JP6851950B2 - Display device, welding torch, wire feeder, and relay device - Google Patents

Description

The present invention relates to a display device in a consumable electrode type welding system. The present invention also relates to a welding torch, a wire feeding device, and a relay device in a consumable electrode type welding system.

In the consumable electrode type welding system, the operator performs inching to feed the welding wire without supplying welding power as a preparation for the welding work. In inching, the operator turns on the inching switch to start feeding the welding wire. Patent Document 1 discloses a welding apparatus capable of inching. When the operator starts the inching, he / she visually confirms that the welding wire has been sent out from the tip of the welding torch, turns off the inching switch, and stops the inching.

Japanese Unexamined Patent Publication No. 2015-16500

However, since the cable connecting the wire feeding device and the welding torch is not a transparent member, the feeding status of the welding wire cannot be known. Therefore, when visually determining the stop of the inching, the welding wire suddenly comes out from the tip of the welding torch. Therefore, the inching switch cannot be turned off at an appropriate timing, and the welding wire may come out too much from the tip of the welding torch. The excess welding wire that came out had to be cut with pliers or the like. In particular, when the distance between the wire feeding device and the welding torch is, for example, 10 m or more, the feeding speed of the welding wire in the inching may be increased. In this case, it becomes difficult to turn off the inching switch at an appropriate timing.

Therefore, the present invention has been conceived in view of the above problems, and an object of the present invention is to allow an operator to grasp the feeding status of the welding wire at the time of inching so that the welding wire is extra from the tip of the welding torch. It is an object of the present invention to provide a display device which can suppress the overshooting. Another object of the present invention is to provide a welding torch, a wire feeding device, and a relay device, each of which is equipped with the display device.

The display device provided by the first aspect of the present invention is a display device of a welding system having a wire feeding device including a feeding motor for feeding the welding wire to the welding torch, and performing inching. An operation unit that accepts an operation and a stop operation, an inching command unit that commands the drive of the feed motor when the operation unit receives an inching execution operation, and the welding wire from the time when the inching is started. It is characterized by including a display unit for displaying the integrated feed amount. According to this configuration, the cumulative feeding amount of the welding wire from the time when the inching is started is displayed on the display unit. Therefore, the operator can operate the inching switch while grasping the feeding status of the welding wire at the time of inching. As a result, it is possible to prevent the welding wire from protruding excessively from the tip of the welding torch.

In a preferred embodiment of the display device, the display unit displays the integrated feed amount by graphic display. According to this configuration, the integrated feeding amount displayed graphically is displayed on the display unit. Therefore, the operator can intuitively grasp the feeding status of the welding wire by confirming the cumulative feeding amount displayed in this figure.

In a preferred embodiment of the display device, the display unit further displays the target value of the integrated feed amount. According to this configuration, the target value of the cumulative feeding amount of the welding wire to be fed by inching is displayed on the display unit. Therefore, the operator can check how much the welding wire is fed to the target during the inching.

In a preferred embodiment of the display device, the integrated feed amount is set to an initial value when a predetermined condition is satisfied after the start of inching. For example, as a predetermined condition, a condition that can be determined that the inching work is completed is set. According to this configuration, the cumulative feeding amount of the welding wire is initialized every time one inching work is completed, so that the cumulative feeding amount of the welding wire for each inching work can be displayed. ..

In a preferred embodiment of the display device, a setting command unit for commanding the setting of the target feeding speed of the welding wire at the time of inching is further provided. According to this configuration, the worker can change the feeding speed at the time of inching. Therefore, the operator can inching at a high feeding speed to the vicinity of the welding torch and inching at a slow feeding speed from the vicinity of the welding torch while checking the cumulative feeding amount of the welding wire displayed on the display unit. it can. As a result, it is possible to further prevent the welding wire from protruding excessively from the tip of the welding torch.

In a preferred embodiment of the display device, an information acquisition unit for acquiring the integrated feed amount is further provided, and the display unit displays the integrated feed amount acquired by the information acquisition unit. According to this configuration, since the display device acquires the cumulative feed amount, it is not necessary to calculate the cumulative feed amount. Therefore, the configuration of the display device becomes simple.

In a preferred embodiment of the display device, an information acquisition unit that acquires an actual feed rate, which is the feed rate of the welded wire that is actually being fed, and an actual feed that is acquired by the information acquisition unit. It further includes a feed amount calculation unit that calculates the integrated feed amount from the speed, and the display unit displays the integrated feed amount calculated by the feed amount calculation unit. According to this configuration, the display device acquires the actual feed rate and calculates the integrated feed rate from the acquired actual feed rate. Therefore, the display device can display the integrated feed amount calculated by the display device.

In a preferred embodiment of the display device, the feeding speed of the welding wire is calculated from the information acquisition unit that acquires the rotation speed of the feeding motor and the rotation speed acquired by the information acquisition unit. A speed calculation unit and a feed amount calculation unit that calculates the integrated feed amount from the actual feed rate calculated by the feed speed calculation unit are further provided, and the display unit includes the feed amount. The integrated feed amount calculated by the calculation unit is acquired. According to this configuration, the display device acquires the rotation speed and calculates the actual feed rate and the integrated feed amount from the acquired rotation speed. Therefore, the display device can display the integrated feed amount calculated by the display device.

In a preferred embodiment of the display device, the information acquisition unit acquires from either a welding power supply device that supplies welding power or the wire feeding device. According to this configuration, the display device can acquire information from either the welding power supply device or the wire feeding device. The information is either the integrated feeding amount, the actual feeding speed, or the rotation speed.

The welding torch provided by the second aspect of the present invention is characterized by comprising the display device provided by the first aspect. According to this configuration, the operator can perform the inching execution operation and the inching stop operation while checking the integrated feed amount from the start of the inching by the welding torch.

The wire feeding device provided by the third aspect of the present invention is characterized by comprising the display device provided by the first aspect. According to this configuration, the operator can perform the inching execution operation and the inching stop operation while checking the integrated feeding amount from the start of the inching by the wire feeding device.

The relay device provided by the fourth aspect of the present invention is a relay device that is arranged in the middle of the induction path of the welding wire from the wire feeding device to the welding torch and relays the feeding of the welding wire. It is characterized by comprising the display device provided by the first aspect. According to this configuration, the operator can perform the inching execution operation and the inching stop operation while checking the integrated feed amount from the start of the inching by the relay device.

According to the present invention, it is possible to make the operator grasp the feeding status of the welding wire at the time of inching. As a result, the operator can prevent the welding wire from protruding excessively from the tip of the welding torch.

It is a schematic diagram which shows the whole structure of the welding system which concerns on 1st Embodiment. It is a functional block diagram of the welding system which concerns on 1st Embodiment. It is a figure which shows the appearance of an example of the welding torch which concerns on 1st Embodiment, (a) is a front view, and (b) is a plan view. This is an example of the screen displayed on the display during inching. It is a timing chart when the worker performs inching. It is a functional block diagram of the welding system which concerns on 2nd Embodiment. It is a functional block diagram of the welding system which concerns on 3rd Embodiment. It is a functional block diagram of the welding system which concerns on 4th Embodiment. It is a schematic diagram which shows the whole structure of the welding system which concerns on 5th Embodiment. It is a functional block diagram of the welding system which concerns on 5th Embodiment. It is a functional block diagram of the welding system which concerns on 6th Embodiment. It is a functional block diagram of the welding system which concerns on 7th Embodiment.

Preferred embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show the welding system A1 according to the first embodiment of the present invention. FIG. 1 is a schematic view showing the overall configuration of the welding system A1. FIG. 2 is a block diagram showing a functional configuration of the welding system A1. The welding system A1 of the first embodiment includes a welding power supply device 1, a wire feeding device 2, a welding torch 3, a power cable 41, 42, a power transmission line 5, a gas cylinder 6, a gas pipe 7, and signal lines 81, 82. It has.

In the welding system A1, the welding power supply device 1 converts the AC power input from the power system P and outputs it from the pair of output terminals. One output terminal of the welding power supply device 1 is connected to the welding torch 3 via a power cable 41. The wire feeding device 2 sends the welding wire to the welding torch 3 so that the tip of the welding wire protrudes from the tip of the welding torch 3. In the contact tip arranged at the tip of the welding torch 3, the power cable 41 and the welding wire are electrically connected. The other output terminal of the welding power supply device 1 is connected to the workpiece W via the power cable 42. The welding power supply device 1 generates an arc between the tip of the welding wire protruding from the tip of the welding torch 3 and the workpiece W, and supplies electric power to the arc. The welding system A1 welds the workpiece W with the heat of the arc.

The welding system A1 is a configuration in gas shield welding in which a shield gas is used at the time of welding. The shield gas of the gas cylinder 6 is supplied to the tip of the welding torch 3 by a gas pipe 7 provided so as to pass through the welding power supply device 1 and the wire feeding device 2. The welding system A1 may be configured to circulate cooling water through the welding torch 3. Further, in the case of self-shielding welding in which the welding system A1 does not require shield gas because gas is self-generated from the welding wire at the time of welding, the configuration may not include the gas cylinder 6 and the gas pipe 7.

The welding power supply device 1 supplies electric power for arc welding to the welding torch 3. The welding power supply device 1 converts the three-phase AC power input from the power system P into power suitable for arc welding and outputs the power. Further, the welding power supply device 1 converts the three-phase AC power input from the power system P into power for driving the wire feeding device 2, and transfers the three-phase AC power to the wire feeding device 2 via the power transmission line 5. Output.

The welding power supply device 1 is controlled to output electric power according to welding conditions and the like, and the welding conditions and the like are changed according to the operation of an operation unit (not shown) provided in the welding power supply device 1. .. Further, the welding power supply device 1 changes the welding conditions and the like according to the signal input from the welding torch 3 via the signal lines 81 and 82.

The wire feeding device 2 sends the welding wire and the shield gas to the welding torch 3. The wire feeding device 2 operates by the electric power supplied from the welding power supply device 1 via the power transmission line 5. A wire reel 201 around which a welding wire is wound is attached to the wire feeding device 2. The wire reel 201 is removable from the wire feeding device 2. The welding wire of the wire reel 201 is guided to the tip of the welding torch 3 by the wire feeding device 2 through the inside of the torch cable 308 and the liner provided inside the welding torch 3, which will be described later.

As shown in FIG. 2, the wire feeding device 2 has a connector 202 for connecting the welding torch 3. The connector 202 is, for example, a concave connection terminal, and the welding torch 3 and the wire feeding device 2 are inserted by inserting a convex torch plug (not shown) provided at one end of the torch cable 308 of the welding torch 3. And connect. Through the connector 202, the power cable 41, the gas pipe 7, the liner, the power transmission line 5 and the signal line 82 inside the wire feeding device 2 are connected to the power cable 41 and the gas pipe 7 inside the torch cable 308, respectively. , Liner, power transmission line 5 and signal line 82.

In the present embodiment, as shown in FIG. 2, the wire feeding device 2 has, as functional blocks, a feeding motor 21, a detection unit 22, a first communication unit 231 and a second communication unit 232, a control unit 24, and , The storage unit 25 is provided.

The feed motor 21 generates a driving force for feeding the welding wire. The feed motor 21 is driven by a control unit 24 (a drive unit 241 described later). A feed roll (not shown) is attached to the rotating shaft of the feed motor 21, and the feed roll is rotated by driving the feed motor 21. In addition, instead of attaching the feed roll to the rotating shaft of the feed motor 21, the rotational force of the feed motor 21 is transmitted to the feed roll by one or more gears to rotate the feed roll. You may. The welding wire is in contact with the feed roll, and is fed by rotating the feed roll. Therefore, the welding wire is fed by driving the feed motor 21. A pressure handle and a pressure roll for reliably feeding the welding wire, and an outlet guide for smoothly feeding the welding wire to the liner in the torch cable 308 from the feeding roll to the connector 202. However, the description and description in the figure are omitted.

The detection unit 22 detects the rotation speed of the feed motor 21. The detection unit 22 is based on, for example, an armature voltage for speed control of the feed motor 21, a detection value of an encoder attached to the feed motor 21, a detection value of a Hall element, or the like. Detects the rotation speed of. The configuration of the detection unit 22 is not limited to these as long as the rotation speed of the feed motor 21 can be detected. In the present embodiment, the detection unit 22 includes a rotary encoder. The detection unit 22 generates an encoder pulse according to the rotation of the feed motor 21 by the rotary encoder. Then, the rotation speed of the feed motor 21 is detected according to the generated encoder pulse. The detection unit 22 outputs the detected rotation speed to the control unit 24.

The first communication unit 231 is for communicating with the welding power supply device 1 via the signal line 81. The first communication unit 231 transmits the signal input from the control unit 24 to the welding power supply device 1, and outputs the signal received from the welding power supply device 1 to the control unit 24. In the present embodiment, the case where the first communication unit 231 performs wired communication with the welding power supply device 1 using the signal line 81 will be described, but wireless communication may be performed.

The second communication unit 232 is for communicating with the welding torch 3 via the signal line 82. The signal line 82 is provided inside the torch cable 308 between the wire feeding device 2 and the welding torch 3. The second communication unit 232 transmits the signal input from the control unit 24 to the welding torch 3, and outputs the signal received from the welding torch 3 to the control unit 24. In the present embodiment, the case where the second communication unit 232 performs wired communication with the welding torch 3 using the signal line 82 will be described, but wireless communication may be performed.

The control unit 24 controls the wire feeding device 2. The control unit 24 is realized by, for example, a microcomputer or the like. The control unit 24 is based on the operation signals of the operation unit (not shown) provided in the wire feeding device 2 and various signals input from the first communication unit 231 and the second communication unit 232, and the wire feeding device 2 Control each part of. Further, the control unit 24 transmits various signals to the welding power supply device 1 via the first communication unit 231 and various signals to the welding torch 3 via the second communication unit 232. In the present embodiment, the control unit 24 includes a drive unit 241, a feed rate calculation unit 242, and a feed amount calculation unit 243.

The drive unit 241 controls the drive of the feed motor 21 and controls the feed of the welding wire to the welding torch 3. The drive unit 241 drives the feed motor 21 by inputting a drive signal to the feed motor 21. That is, the welding wire is fed. In the present embodiment, the drive unit 241 drives the feed motor 21 in response to a welding execution signal (described later) or an inching signal (described later) input from the second communication unit 232 to the control unit 24.

The feed rate calculation unit 242 calculates the feed rate of the welded wire that is actually fed (hereinafter, referred to as “actual feed rate”). In the present embodiment, the feed rate calculation unit 242 calculates the actual feed rate of the welding wire from the rotation speed detected by the detection unit 22 by using a predetermined calculation formula. For example, the feed rate calculation unit 242 calculates the actual feed rate at predetermined intervals.

The feed amount calculation unit 243 calculates the feed amount of the welded wire actually fed (hereinafter, referred to as “inching integrated feed amount”) from the start of inching to the present time (calculation time). In the present embodiment, the feed amount calculation unit 243 actually feeds at each predetermined interval by integrating the actual feed rate at each predetermined interval calculated by the feed rate calculation unit 242 over time at the predetermined interval. The feed amount of the supplied welding wire (hereinafter referred to as "actual feed amount") is calculated. Then, the calculated actual feed amount is added to the inching integrated feed amount stored in the storage unit 25. As a result, the integrated inching feed amount from the start of inching to the calculation time is stored in the storage unit 25. The method of calculating the integrated feeding amount of inching is not limited to the above. For example, the feed amount calculation unit 243 stores in the storage unit 25 the actual feed rate at predetermined intervals input from the feed rate calculation unit 242 after the start of inching. Then, the integrated feeding amount of the inching may be calculated by integrating the actual feeding speed from the start of the stored inching to the present time.

The storage unit 25 stores information necessary for performing various controls of the wire feeding device 2. In the storage unit 25, the writing and reading of information is controlled by the control unit 24. In the present embodiment, the storage unit 25 stores the integrated feeding amount of inching and the target feeding speed at the time of inching (hereinafter, referred to as “target inching speed”). The inching integrated feed amount stored in the storage unit 25 is set to an initial value (for example, zero) by the control unit 24 when a predetermined condition is satisfied. As a predetermined condition, a condition that can be determined that one inching work has been completed is set. Specifically, when a predetermined time has elapsed since the inching was stopped, when a welding execution signal described later is input, when an operation instructing to reset the inching integrated feed amount is input, or when a welding power supply or a welding power supply is input. For example, when the power of the feeding device is turned off. When the control unit 24 determines that at least one of these conditions is satisfied, the control unit 24 sets the inching integrated feed amount stored in the storage unit 25 as an initial value. As a result, the integrated inching feed amount is initialized each time one inching operation is completed, so that the integrated inching feed amount is added from zero at the next inching. That is, the cumulative feeding amount of the welding wire for each inching operation can be calculated.

In the present embodiment, when the inching signal is input from the second communication unit 232 in the control unit 24, the following processing is performed. That is, when an inching signal is input from the second communication unit 232 to the control unit 24, the drive unit 241 drives the feed motor 21 according to the input inching signal. When the feed motor 21 is driven, the detection unit 22 detects the rotation speed of the feed motor 21. Then, the feeding speed calculation unit 242 calculates the actual feeding speed from the rotation speed, and the feeding amount calculation unit 243 calculates the inching integrated feeding amount from the actual feeding speed. The calculated actual feed rate and the integrated inching feed amount are transmitted from the control unit 24 to the welding torch 3 via the second communication unit 232.

In the present embodiment, the drive unit 241 performs feedback control at the time of inching so that the actual feed rate at predetermined intervals calculated by the feed rate calculation unit 242 becomes the target inching speed. Further, the drive unit 241 performs feedback control at the time of welding so as to reach the target feeding speed set for the time of welding. The drive unit 241 may be feedback-controlled so that the actual feed amount calculated by the feed amount calculation unit 243 at predetermined intervals becomes the target feed amount set for each inching and welding. Good.

The welding torch 3 welds the workpiece W by the welding power supplied from the welding power supply device 1. The welding torch 3 is operated by electric power supplied from the welding power supply device 1 via the power transmission line 5. The electric power stored in the secondary battery provided in the welding torch 3 may be used for operation. FIG. 3 is a diagram showing the appearance of an example of the welding torch 3. The figure (a) is a front view, and the figure (b) is a plan view. As shown in FIG. 3, the welding torch 3 includes a torch body 301, a handle 302, a control board 303, a display 304, a torch switch 305, an inching switch 306, a plurality of operation buttons 307, and a torch cable 308.

The torch body 301 is a tubular member made of metal, and a liner into which a welding wire is inserted, a power cable 41, and a gas pipe 7 are arranged therein. A nozzle 301a is attached to the tip of the torch body 301. The torch body 301 has a curved portion so that the operator can easily point the nozzle 301a at the workpiece W.

The handle 302 is a portion for the operator to grip, and is provided so as to hold the base end portion of the torch body 301. The operator grips the handle 302 and performs welding work. A display 304, a torch switch 305, an inching switch 306, and an operation button 307 are arranged on the handle 302. A control board 303 is arranged inside the handle 302.

The display 304 displays various types of displays. As shown in FIG. 3A, the display 304 is arranged on the side of the handle 302 opposite to the torch switch 305.

The torch switch 305 is an operating means for accepting a welding execution operation and a welding stop operation. The torch switch 305 is attached to the handle 302, and is arranged at a position where the operator holding the handle 302 can easily push the torch switch with his / her index finger. In the present embodiment, the torch switch 305 is composed of a push switch, and when pressed, a welding execution operation is received, and when the pressing is released, a welding stop operation is received. Therefore, when the torch switch 305 is pressed, the welding power is output and the welding wire is fed. Then, when the torch switch 305 is released from being pressed, the output of the welding power is stopped and the feeding of the welding wire is stopped. The operator performs welding by operating the torch switch 305.

The inching switch 306 is an operating means for receiving an inching execution operation and an inching stop operation. The inching switch 306 is attached to the handle 302. In the present embodiment, the inching switch 306 is composed of a push switch, and when pressed, an inching execution operation is received, and when the pressing is released, an inching stop operation is received. Therefore, when the inching switch 306 is pressed, inching is executed. Then, when the pressing of the inching switch 306 is released, the inching is stopped. In the present embodiment, the case where the inching is executed only while the inching switch 306 is pressed is shown. However, by pressing the inching switch 306 once, the inching is continuously executed, and by pressing the inching switch 306 again, the inching is continuously executed. , The inching may be stopped. The operator executes inching by operating the inching switch 306. The inching switch 306 may be composed of other switches such as a toggle switch and a rocker switch instead of the push switch.

The operation button 307 is an operation means for switching screens and changing various setting values. The operation button 307 is located on the same side of the handle 302 as the display 304, and is arranged between the grip portion of the handle 302 and the display 304. The operation button 307 includes an upper button 307a, a lower button 307b, a left button 307c, and a right button 307d. The left button 307c and the right button 307d are operating means for switching the screen displayed on the display 304. The up button 307a and the down button 307b are operating means for changing the set value displayed on the display 304. By operating the plurality of operation buttons 307, the operator sets, for example, welding conditions, a target inching speed, and a target value of the inching integrated feeding amount.

A sensor for detecting the pressing of each operation button 307 is mounted on the control board 303. Further, the display 304 is arranged on the same control board 303. In the present embodiment, the display screen of the display 304 has a predetermined angle with respect to the control board 303 so that the operator can easily operate each operation button 307 while looking at the display screen of the display 304. There is. The display 304 may be arranged so that the display screen is parallel to the control board 303.

The appearance of the welding torch 3 is not limited to that shown in FIG. For example, the arrangement location and shape of the display 304, the torch switch 305, the inching switch 306, and each operation button 307 are not limited. Further, in the present embodiment, the case where the plurality of operation buttons 307 are four independent buttons is shown, but one cross button may be used. Also, the number of buttons is not limited. Further, although the case where the inching switch 306 is provided is shown, the inching may be executed by operating the operation button 307.

As shown in FIG. 2, the welding torch 3 includes a communication unit 31, a display unit 32, an operation unit 33, a storage unit 34, and a control unit 35 as functional blocks. The circuits constituting the communication unit 31, the display unit 32, the operation unit 33, the storage unit 34, and the control unit 35 are mounted on the control board 303.

The communication unit 31 is for communicating with the wire feeding device 2. The communication unit 31 transmits the signal input from the control unit 35 to the wire feeding device 2 via the signal line 82 inside the torch cable 308. Further, the communication unit 31 receives the signal input from the wire feeding device 2 via the signal line 82 inside the torch cable 308 and outputs the signal to the control unit 35. As a communication standard, for example, CAN (Controller Area Network) is used. In the present embodiment, the case where the communication unit 31 performs wired communication with the wire feeding device 2 using the signal line 82 will be described, but wireless communication may be performed.

The display unit 32 displays various types of displays, and includes, for example, a display 304 which is a liquid crystal display device. The display unit 32 is controlled by the control unit 35. The display unit 32 (display 304) displays the welding conditions stored in the storage unit 34. Further, the display unit 32 (display 304) displays, during inching, the inching integrated feeding amount of the welding wire, the target value of the inching integrated feeding amount of the welding wire, and the current feeding speed of the welding wire (the above-mentioned actual feeding). Feeding speed) etc. are displayed.

FIG. 4 shows an example of a screen displayed on the display 304 during inching. In the present embodiment, as shown in FIG. 4, the display 304 has an icon display S1 indicating that welding is in progress, a numerical display S2 indicating the current welding wire feeding speed (the actual feeding speed), and the like. Numerical display S3 showing the target value of the integrated inching feed amount at the time of inching, numerical display S4 showing the total inching feed amount of the current welding wire, and the total inching feed amount and inching cumulative feed amount of the current welding wire. A graphic display S5 or the like indicating the target value of the amount is displayed. In the graphic display S5 shown in FIG. 4, a plurality of quadrangular marks are lined up. These square marks are all white before the welding of the welding wire is started, and become black in order from the left in the figure every time the welding wire is fed 1 m. In FIG. 4, since the block between "6" and "7" is black, it is shown that the integrated feeding amount of inching is 7 m. Further, in the graphic display S5 shown in FIG. 4, a black inverted triangle mark is displayed at a position indicating a target value (10 m) of the integrated feeding amount of inching. The screen displayed on the display 304 is not limited to this, and at least the integrated feeding amount of the welding wire may be displayed.

The operation unit 33 includes a plurality of operation means, and outputs the operation of each operation means by the operator to the control unit 35 as an operation signal. In the present embodiment, the operation unit 33 includes a torch switch 305, an inching switch 306, and a plurality of operation buttons 307 as operation means. Therefore, the operation unit 33 outputs the operation signal corresponding to the operation of the torch switch 305, the operation signal corresponding to the operation of the inching switch 306, and the operation signal corresponding to the operation of each operation button 307 to the control unit 35. The operation unit 33 may be provided with other operation means.

The storage unit 34 stores each set value such as welding conditions. Further, the storage unit 34 stores the target values of the target inching speed and the inching integrated feeding amount. The target value of the integrated feeding amount of the inching is set in advance based on, for example, the length of the torch cable 308. Further, the target value of the integrated feeding amount of inching may be set and changed by the operation of the operation unit 33 (operation button 307).

The control unit 35 controls the welding torch 3, and is realized by, for example, a microcomputer or the like. The control unit 35 performs predetermined processing according to various operation signals input from the operation unit 33. Further, the control unit 35 controls communication by the communication unit 31, writing and reading of information in the storage unit 34, and display on the display unit 32. In the present embodiment, the control unit 35 includes a welding command unit 351, an inching command unit 352, a setting unit 353, an information acquisition unit 354, and an image creation unit 355.

When an operation signal corresponding to the operation of the torch switch 305 is input from the operation unit 33 to the control unit 35, the welding command unit 351 generates a welding execution signal in response to the operation signal. The welding execution signal is turned on, for example, when the torch switch 305 is pressed and the welding execution operation is being performed, and is turned off when the pressing is released and the welding stop operation is being performed. Then, the generated welding execution signal is transmitted to the wire feeding device 2 and the welding power supply device 1 via the communication unit 31. As a result, the welding command unit 351 drives the wire feeding device 2 to feed the welding wire, and causes the welding power supply device 1 to output welding power. In the present embodiment, when the welding execution signal is on, the welding wire is fed and the welding power is output, and when the welding execution signal is off, the welding wire is fed and the welding power is output. Is not output.

When an operation signal corresponding to the operation of the inching switch 306 is input from the operation unit 33 to the control unit 35, the inching command unit 352 generates an inching signal in response to the operation signal. The inching signal is turned on, for example, when the inching switch 306 is pressed and the inching is executed, is released, and is turned off when the inching is stopped. Then, the generated inching signal is transmitted to the wire feeding device 2 via the communication unit 31. As a result, the inching command unit 352 drives the wire feeding device 2 to feed the welding wire 21. In the present embodiment, the welding wire is fed when the inching signal is on, and the welding wire is not fed when the inching signal is off. The inching signal is not limited to the above. For example, it may be a signal instructing only the start and stop of inching. In this case, when the wire feeding device 2 receives the signal instructing the start, the wire feeding device 2 feeds the welding wire until it receives the signal instructing the stop. Further, the inching command unit 352 may transmit the inching signal in the ON state to the wire feeding device 2 only when the inching switch 306 is pressed.

When an operation signal corresponding to the operation of each operation button 307 is input from the operation unit 33 to the control unit 35, the setting unit 353 performs a predetermined setting process according to the operation signal. In the present embodiment, the predetermined setting process includes a welding condition setting process, a target inching speed setting process, and a target value setting process of the inching integrated feeding amount. As a welding condition setting process, the setting unit 353 generates a welding condition setting signal for changing the welding condition setting, and transmits this to the welding power supply device 1. Then, the welding power supply device 1 changes the setting value of the welding condition according to the received welding condition setting signal. As a result, the welding conditions are set. As a target inching speed setting process, the setting unit 353 generates an inching speed setting signal for setting the target inching speed, and transmits this to the wire feeding device 2. Then, the wire feeding device 2 changes the set value of the target inching speed stored in the storage unit 25 according to the received inching speed setting signal. As a result, the target inching speed is set. The inching speed setting signal may be a signal indicating the set value of the target inching speed itself, or a signal for increasing or decreasing the set value. In the present embodiment, the setting unit 353 corresponds to the "setting command unit" of the present invention. As a process of setting the target value of the inching integrated feeding amount, the setting unit 353 changes the target value of the inching integrated feeding amount stored in the storage unit 34. As a result, the target value of the integrated feeding amount of inching is set.

The information acquisition unit 354 acquires predetermined information from the wire feeding device 2 via the communication unit 31. In the present embodiment, the information acquisition unit 354 acquires the actual feeding speed and the inching integrated feeding amount during inching. Whether or not inching is in progress is determined by whether or not an operation signal corresponding to the operation of the inching switch 306 is input from the operation unit 33 to the control unit 35, or whether or not the inching signal generated by the inching command unit 352 is on. It can be judged based on whether or not it is.

The image creation unit 355 creates various images to be displayed on the display unit 32. In the present embodiment, the actual feed rate and the integrated inching feed amount acquired by the information acquisition unit 354 and the target value of the integrated inching feed amount stored in the storage unit 34 are used to display the display during inching. Create an image (see FIG. 4). The image creation unit 355 causes the display unit 32 (display 304) to display the created display image.

In the welding system A1 configured as described above, the inching command unit 352 generates an inching signal in response to the operation of the inching switch 306 by the operator. Then, the inching signal is transmitted to the wire feeding device 2. The wire feeding device 2 drives the feeding motor 21 in response to the received inching signal to start feeding the welding wire. That is, inching is started. When the inching is started, the information acquisition unit 354 acquires the actual feeding speed and the inching integrated feeding amount transmitted from the wire feeding device 2. Then, the image creation unit 355 uses the actual feed rate and the integrated inching feed amount acquired by the information acquisition unit 354 and the target value of the integrated inching feed amount stored in the storage unit 34 during inching. A display image is created and displayed on the display unit 32 (display 304). Inching is performed in this way.

Next, an example of inching work in the welding system A1 will be described. FIG. 5 is a timing chart when the operator performs inching. FIG. 5A shows an inching signal. FIG. 5B shows the actual feed rate of the welded wire. FIG. 5C shows the integrated feeding amount of the welding wire inching. The inching is performed, for example, as a welding preparation after attaching the new wire reel 201 to the wire feeding device 2. Further, the inching is a welding wire located on the outer peripheral portion of the welding wire wound around the wire reel 201 when confirming whether or not there is an abnormality in the feeding operation of the welding wire, and is dirty or rusted. This is also done when discarding the weld wire. The purpose of inching is not limited to the above reasons.

When the operator presses the inching switch 306 at time t1 to instruct the execution of inching in order to perform inching, the inching signal is turned on as shown in FIG. 5A. The inching signal is transmitted from the inching command unit 352 to the wire feeding device 2 via the communication unit 31 and the second communication unit 232. Then, the drive unit 241 drives the feed motor 21 in response to the received inching signal. As a result, the feeding of the welding wire is started.

When the feed motor 21 is driven, the detection unit 22 detects the rotation speed of the feed motor 21, and the rotation speed is output to the feed speed calculation unit 242. Then, the feeding speed calculation unit 242 calculates the actual feeding speed of the welding wire from the rotation speed input from the detection unit 22. At this time, the drive unit 241 controls so that the actual feeding speed becomes the preset target inching speed (first target inching speed V1). Therefore, as shown in FIG. 5B, the actual feeding speed of the welding wire gradually increases from the time t1 and reaches the first target inching speed V1 at the time t2, and then the actual feeding speed of the welding wire. Is maintained at the first target inching speed V1. Further, the feed amount calculation unit 243 calculates the actual feed amount from the actual feed rate calculated by the feed rate calculation unit 242. Each time the feed amount calculation unit 243 calculates the actual feed amount, it adds this to the inching integrated feed amount stored in the storage unit 25 of the control unit 24. As a result, as shown in FIG. 5C, the integrated feeding amount of inching increases from time t1.

The control unit 35 (information acquisition unit 354) of the welding torch 3 acquires the actual feeding speed and the inching integrated feeding amount from the wire feeding device 2 during inching. The image creation unit 355 uses, for example, the actual feed rate and the integrated inching feed amount acquired by the information acquisition unit 354 and the target value of the integrated inching feed amount stored in the storage unit 34, as shown in FIG. 4, for example. A display image is created and displayed on the display unit 32 (display 304). As a result, the operator can confirm how much the welding wire has been fed by the display image (see FIG. 4) displayed on the display 304.

After that, the worker confirms the inching integrated feeding amount displayed on the display 304, and when the inching integrated feeding amount reaches a value L1 smaller than, for example, the target value L2 of the inching integrated feeding amount (time t3). , The pressing of the inching switch 306 is released. By releasing the pressing of the inching switch 306, as shown in FIG. 5A, the inching signal is turned off at time t3, and the drive unit 241 stops the drive of the feed motor 21. At this time, the rotation speed of the feed motor 21 does not instantly become "0", but gradually decreases to "0". Therefore, the actual feeding speed of the welding wire gradually decreases from the time t3 when the pressing of the inching switch 306 is released. Then, at time t4, the actual feeding speed becomes "0", and the feeding of the welding wire is stopped. Since the welding wire is fed from time t3 to time t4, the integrated feeding amount of inching is increasing as shown in FIG. 5 (c).

Subsequently, the operator uses the operation unit 33 (various operation buttons 307a to 307d) of the welding torch 3 to set the feeding speed at the time of inching, which is lower than the first target inching speed V1 set earlier. The speed (second target inching speed V2) is set. Then, at time t5, the inching switch 306 is pressed again. As a result, as shown in FIG. 5A, the inching signal is turned on at time t5, and the drive unit 241 drives the feed motor 21. Then, as shown in FIG. 5B, the feeding of the welding wire is controlled so that the actual feeding speed becomes the second target inching speed V2. It should be noted that the period during which the inching signal from the time t3 to the time t5 is in the off state is the predetermined time or less, that is, the predetermined time has not elapsed since the instruction to stop the inching is instructed, and thus is shown in FIG. 5 (c). As described above, the integrated feeding amount of inching is not initialized. Further, since the drive unit 241 drives the feed motor 21 to feed the welding wire, the integrated feeding amount of the inching increases from the time t5 as shown in FIG. 5 (c). At this time, since the actual feeding speed became slower, the degree of increase in the integrated feeding amount of inching was small.

When the operator confirms that the tip of the welding wire protrudes from the tip of the welding torch 3 by an appropriate length (for example, about 10 cm) while looking at the tip of the welding torch 3 (time t7), the inching switch 306 is pressed. To cancel. As a result, as shown in FIG. 5A, the inching signal is turned off at time t7, and the drive unit 241 stops driving the feed motor 21. Therefore, the feeding of the welding wire is stopped. Therefore, the operator can stop the inching when the welding wire is fed to an appropriate position by the inching.

The above-mentioned inching work is an example and is not limited to this. For example, in the above example, when the integrated feeding amount of the inching reaches the predetermined length L1, the execution of the inching is stopped once, but the inching is not stopped and the inching remains at the first target inching speed V1. The welding wire may be fed up to the target value L2 of the cumulative feed amount. Further, when the inching integrated feed amount becomes a value L1 that is smaller than a predetermined value from the target value L2 of the inching integrated feed amount, or becomes a predetermined ratio (for example, 90%) of the target value L2 of the inching integrated feed amount. At that time, it may be configured to automatically change to the second target inching speed V2.

Next, the action and effect of the welding torch 3 will be described.

According to the first embodiment, the feed amount of the welding wire at the time of inching (inching integrated feed amount) is displayed on the display 304 (display unit 32). Therefore, the operator can recognize the inching integrated feed amount by looking at the display on the display 304 (display unit 32). As a result, the operator can perform the inching work while checking the feeding status of the welding wire at the time of inching, so that it is possible to prevent the welding wire from excessively protruding from the tip of the welding torch 3.

According to the first embodiment, the display 304 (display unit 32) and the inching switch 306 (operation unit 33) are provided on the welding torch 3. Therefore, the operator can perform the inching work while checking the integrated inching feed amount of the welding wire at hand. Further, in the present embodiment, the target inching speed can be set by the welding torch 3. Therefore, the operator can set the target inching speed while checking the feeding status of the welding wire at hand.

According to the first embodiment, the display 304 (display unit 32) displays the target value of the inching integrated feeding amount as well as the inching integrated feeding amount of the welding wire. As a result, the operator can grasp how much the welding wire has been fed with respect to the target value of the integrated welding feed amount. Further, these are displayed not only numerically but also graphically (see S5 in FIG. 4). As a result, the operator can intuitively grasp the feeding status of the welding wire at the time of inching.

In the first embodiment, the case where the integrated feeding amount of the welding wire is displayed on the display 304 is shown, but not only the display on the display 304 but also, for example, the welding torch when the length is 90% of the target. The speaker (not shown) provided in No. 3 may be notified by voice or may be vibrated. In this case, the operator does not have to keep an eye on the display 304.

In the first embodiment, the display unit 32 (display 304) shows the case where the inching integrated feed amount calculated by the feed amount calculation unit 243 is displayed as it is, but the present invention is not limited to this. For example, as shown in FIG. 5, even if the inching signal is turned off, the actual feeding speed does not instantly become “0” but gradually decreases to “0”. Therefore, in FIG. 5, from the time t3 to the time t4, the inching integrated feed amount increases even though the inching switch 306 is released from being pressed. Therefore, even if the operator releases the pressing of the inching switch 306 when the integrated inching feed amount displayed on the display 304 reaches a desired value, when the feeding of the welding wire actually stops, the inching An inching integrated feeding amount larger than the inching integrated feeding amount displayed when the switch 306 is released is displayed. Therefore, at the current actual feeding speed during inching, the control unit 35 is fed by the time the actual feeding speed becomes "0" when the pressing of the inching switch 306 is released at the current timing. The feed amount of the welding wire is predicted based on the performance (deceleration degree) of the feed motor 21 and the actual feed rate. Then, the predicted feed amount is added (added) to the inching integrated feed amount calculated by the feed amount calculation unit 243 and displayed on the display 304. By doing so, even during inching, it is possible to display the inching integrated feeding amount when the feeding of the welding wire actually stops.

6 to 12 show other embodiments of the present invention. In these figures, the same or similar elements as those in the first embodiment are designated by the same reference numerals as those in the first embodiment.

Next, the welding system A2 according to the second embodiment will be described. In the present embodiment, the welding torch 3 calculates the integrated feeding amount of inching. FIG. 6 is a functional block diagram of the welding system A2. As shown in the figure, the welding system A2 is different from the first embodiment (see FIG. 2) in that the control unit 35 of the welding torch 3 has the feed amount calculation unit 356.

The feed amount calculation unit 356 is configured in the same manner as the feed amount calculation unit 243. That is, the feed amount calculation unit 356 calculates the inching integrated feed amount from the actual feed rate of the welding wire. In the present embodiment, the feed amount calculation unit 356 calculates the inching integrated feed amount based on the actual feed rate acquired by the information acquisition unit 354. Specifically, since the actual feed rate acquired by the information acquisition unit 354 is the actual feed rate at predetermined intervals, the feed amount calculation unit 356 sets the actual feed rate at each predetermined interval to the predetermined interval. By integrating the time with, the actual amount of feed is calculated at predetermined intervals. In the present embodiment, the inching integrated feed amount is stored in the storage unit 34, and the feed amount calculation unit 356 stores the calculated actual feed amount in the storage unit 34. Add to. As a result, the integrated inching feed amount from the start of inching to the calculation time is stored in the storage unit 34. As described above, the feed amount calculation unit 356 calculates the inching integrated feed amount.

In the welding system A2, when the inching command unit 352 commands the execution of inching, the information acquisition unit 354 delivers the actual feed calculated by the feed rate calculation unit 242 from the wire feed device 2 via the communication unit 31. Get the feed rate. The feed amount calculation unit 356 calculates the inching integrated feed amount based on the actual feed rate acquired by the information acquisition unit 354. The image creation unit 355 has a target value of the actual feed rate acquired by the information acquisition unit 354, the inching integrated feed amount calculated by the feed amount calculation unit 356, and the inching integrated feed amount stored in the storage unit 34. Create a display image (see FIG. 4) in which the above is displayed. Then, the image creation unit 355 causes the display unit 32 (display 304) to display the created display image.

According to the second embodiment, the feed amount of the welding wire at the time of inching (inching integrated feed amount) is displayed on the display 304. Therefore, the operator can recognize the integrated feeding amount of the welding wire by looking at the display on the display 304. As a result, the operator can perform the inching work while checking the feeding status of the welding wire at the time of inching, so that it is possible to prevent the welding wire from excessively protruding from the tip of the welding torch 3. That is, the same effect as that of the first embodiment can be obtained in the second embodiment.

Next, the welding system A3 according to the third embodiment will be described. In the present embodiment, the welding torch 3 calculates the actual feeding speed of the welding wire and the integrated feeding amount of the inching. This point is different from the first embodiment. FIG. 7 is a functional block diagram of the welding system A3. As shown in the figure, the welding system A3 has the first embodiment (see FIG. 2) in that the control unit 35 of the welding torch 3 has a feed rate calculation unit 357 and a feed amount calculation unit 356. ) Is different.

The feed rate calculation unit 357 is configured in the same manner as the feed rate calculation unit 242. That is, the feed rate calculation unit 357 calculates the actual feed rate from the rotation speed of the feed motor 21.

In the present embodiment, the information acquisition unit 354 acquires the rotation speed of the feed motor 21 detected by the detection unit 22.

In the welding system A3, when an inching signal is transmitted from the welding torch 3 to the wire feeding device 2 and the inching is executed, the information acquisition unit 354 acquires the rotation speed of the feeding motor 21 from the wire feeding device 2. .. Next, the feed rate calculation unit 357 calculates the actual feed rate of the welding wire from the rotation speed of the feed motor 21 acquired by the information acquisition unit 354. Next, the feed amount calculation unit 356 calculates the inching integrated feed amount from the actual feed rate calculated by the feed rate calculation unit 357. Next, the image creation unit 355 uses the actual feed rate calculated by the feed rate calculation unit 357, the inching integrated feed amount calculated by the feed amount calculation unit 356, and the inching integrated feed stored in the storage unit 34. Create a display image (see FIG. 4) displaying the target value of the amount of salary. Then, the image creation unit 355 causes the display unit 32 (display 304) to display the created display image.

In the welding system A3, as shown in FIG. 7, the control unit 24 of the wire feeding device 2 has a feeding speed calculation unit 242. This is provided for the drive unit 241 to perform feedback control based on the actual feed rate of the welding wire. However, when the wire feeding device 2 acquires the actual feeding speed from the feeding speed calculation unit 357 of the welding torch 3, the feeding speed calculation unit 242 may not be provided.

According to the third embodiment, the feed amount of the welding wire at the time of inching (inching integrated feed amount) is displayed on the display 304. Therefore, the operator can recognize the integrated feeding amount of the welding wire by looking at the display on the display 304. As a result, the operator can perform the inching work while checking the feeding status of the welding wire at the time of inching, so that it is possible to prevent the welding wire from excessively protruding from the tip of the welding torch 3. That is, the same effect as that of the first embodiment can be obtained in the third embodiment.

Next, the welding system A4 according to the fourth embodiment will be described. In the present embodiment, the wire feeding device 2 is made to display the inching integrated feeding amount. This point is different from the first embodiment. FIG. 8 is a functional block diagram of the welding system A4. As shown in the figure, the welding system A4 is different from the first embodiment (see FIG. 2) in that the wire feeding device 2 is provided with the display unit 26 and the operation unit 27. Further, as shown in FIG. 8, the control unit 24 is different from the first embodiment (see FIG. 2) in that the inching command unit 244, the setting unit 245, and the image creation unit 246 are further included.

The display unit 26 is configured in the same manner as the display unit 32 of the welding torch 3. The display unit 26 displays various types of displays, and includes, for example, a display which is a liquid crystal display device. The display unit 26 is controlled by the control unit 24. The display unit 26 displays the inching integrated feeding amount of the welding wire, the target value of the inching integrated feeding amount of the welding wire, the actual feeding speed, and the like (see FIG. 4).

The operation unit 27 is configured in the same manner as the operation unit 33 of the welding torch 3. The operation unit 27 includes a plurality of operation means, and outputs the operation of each operation means by the operator to the control unit 24 as an operation signal. In the present embodiment, as an operation means, the operation unit 27 includes an inching switch for receiving an inching execution operation and a stop operation, and an operation button for receiving an operation for setting a target inching speed and a target value of the inching integrated feeding amount. , At least.

The inching command unit 244 is configured in the same manner as the inching command unit 352. The inching command unit 244 generates an inching signal when an operation signal corresponding to an inching execution operation is input from the operation unit 27 to the control unit 24. Then, the generated inching signal is output to the drive unit 241. As a result, the drive unit 241 drives the feed motor 21 in response to the inching signal to execute the inching.

The setting unit 245 is configured in the same manner as the setting unit 353. When the operation unit 27 inputs the operation signals corresponding to the various setting operations to the control unit 24, the setting unit 245 performs a predetermined setting process according to the operation signals. In the present embodiment, the predetermined setting process includes a target inching speed setting process, an inching integrated feeding amount setting process, and the like. As the target inching speed setting process, the setting unit 245 changes the set value of the target inching speed stored in the storage unit 25. As a result, the target inching speed is set. As a process of setting the target value of the inching integrated feeding amount, the storage unit 25 stores the target value of the inching integrated feeding amount, and the setting unit 245 stores the inching integrated feeding amount stored in the storage unit 25. Change the target value of. As a result, the target value of the integrated feeding amount of inching is set. In the present embodiment, the setting unit 245 corresponds to the "setting command unit" of the present invention.

The image creation unit 246 is configured in the same manner as the image creation unit 355. The image creation unit 246 is of the actual feed rate calculated by the feed rate calculation unit 242, the inching integrated feed amount calculated by the feed amount calculation unit 243, and the inching integrated feed amount stored in the storage unit 25. Create a display image (see FIG. 4) in which the target value and the like are displayed. The image creation unit 246 causes the display unit 26 to display the created display image.

In the welding system A4, the inching command unit 244 generates an inching signal in response to an operation of the operation unit 27 by an operator (operation of an inching switch provided in the wire feeding device 2). Then, the drive unit 241 drives the feed motor 21 in response to the inching signal to execute the inching. When the inching is executed, the detection unit 22 detects the rotation speed of the feed motor 21 and outputs this to the control unit 24. Then, the feed rate calculation unit 242 calculates the actual feed rate from the input rotation speed, and the feed amount calculation unit 243 calculates the inching integrated feed amount. The image creation unit 246 is of the actual feed rate calculated by the feed rate calculation unit 242, the inching integrated feed amount calculated by the feed amount calculation unit 243, and the inching integrated feed amount stored in the storage unit 25. Create a display image (see FIG. 4) in which the target value is displayed. Then, this is displayed on the display unit 26. Inching is performed in this way.

According to the fourth embodiment, the feeding amount of the welding wire at the time of inching (inching integrated feeding amount) is displayed on the display unit 26 of the wire feeding device 2. Therefore, the operator can recognize the integrated feeding amount of the welding wire by looking at the display on the display unit 26. As a result, the operator can perform the inching work while checking the feeding status of the welding wire at the time of inching, so that it is possible to prevent the welding wire from excessively protruding from the tip of the welding torch 3. That is, the same effect as that of the first embodiment can be obtained in the fourth embodiment.

In the fourth embodiment, the case where the inching command unit 244 is provided has been described, but it is not necessary to provide the inching command unit 244. In this case, when an operation signal corresponding to the execution operation of the inching is input from the operation unit 27 to the control unit 24, the drive unit 241 may drive the feed motor 21 in response to the operation signal. As a result, inching is performed.

In the fourth embodiment, since the integrated feeding amount of inching is displayed on the display unit 26 of the wire feeding device 2, the welding torch 3 does not have to be provided with the display unit 32. Further, in the fourth embodiment, since the wire feeding device 2 is provided with the inching switch and the operation button, the welding torch 3 does not have to be provided with the inching switch 306 and the operation button 307.

In the fourth embodiment, the wire feeding device 2 has a display unit 26 and an operation unit 27, and the welding torch 3 has a display unit 32 and an operation unit 33. Therefore, for example, when the inching execution operation and the inching stop operation are performed using the operation unit 33 of the welding torch 3, the inching integrated feeding amount is displayed on the display unit 32 of the welding torch 3, and the wire feeding device 2 When the inching execution operation and the stop operation are performed using the operation unit 27 of the above, the inching integrated feeding amount may be displayed on the display unit 26 of the wire feeding device 2.

Next, the welding system A5 according to the fifth embodiment will be described. In the present embodiment, the inching integrated feeding amount is displayed on the relay device that relays the feeding of the welding wire from the wire feeding device 2 to the welding torch 3. This point is different from the first embodiment. FIG. 9 is a schematic view showing the overall configuration of the welding system A5. FIG. 10 is a block diagram showing a functional configuration of the welding system A5.

As shown in FIG. 9, the welding system A5 is different from the welding system A1 (see FIG. 1) according to the first embodiment in that it further includes a relay device 9. The relay device 9 is arranged in the middle of the guide path of the welding wire from the wire feeding device 2 to the welding torch 3. Further, the relay device 9 relays the feeding of the welding wire from the wire feeding device 2 to the welding torch 3 as described above. Further, the relay device 9 can communicate with the wire feeding device 2 and the welding torch 3. In the relay device 9, for example, it is difficult to install or move the wire feeding device 2 and the welding power supply device 1 for welding work in a high place, welding work of a long object or a large structure, welding work in a narrow place, etc. In some cases, it is a relay feeder used. The relay device 9 includes a relay cable 901 and a connector 902.

The relay cable 901 is connected to the wire feeding device 2. Similar to the torch cable 308, the relay cable 901 has a power cable 41, a gas pipe 7, a liner, a power transmission line 5, and a signal line 82 arranged inside the cable. One end of the relay cable 901 is a convex plug like the one end of the torch cable 308, and can be inserted into the connector 202 of the wire feeding device 2. By inserting the relay cable 901 into the connector 202 of the wire feeding device 2, the power cable 41, the gas pipe 7, the liner, the power transmission line 5 and the signal line 82 inside the wire feeding device 2 are inserted through the connector 202. Are connected to the power cable 41 inside the relay cable 901, the gas pipe 7, the liner, the power transmission line 5, and the signal line 82, respectively.

The connector 902 is a concave connection terminal like the connector 202, and the above-mentioned convex torch plug of the torch cable 308 can be inserted. By inserting the torch cable 308 of the welding torch 3 into the connector 902 of the relay device 9, the power cable 41 inside the relay device 9, the gas pipe 7, the liner, the power transmission line 5 and the signal line 82 are passed through the connector 902. Are connected to the power cable 41 inside the torch cable 308, the gas pipe 7, the liner, the power transmission line 5, and the signal line 82, respectively.

The relay device 9 also includes a drive roller, a driven roller, a motor for rotationally driving the drive roller, and the like. In the relay device 9, the welding wire is sandwiched between the driving roller and the driven roller, and the welding wire is sent out to the welding torch 3 by the rotational drive of the driving roller. The driven roller is urged, for example, on the driving roller side with a predetermined urging force. As a result, when the drive roller is rotationally driven, the welding wire sandwiched between the drive roller and the driven roller is sent out.

In the present embodiment, as shown in FIG. 10, the relay device 9 has the first communication unit 911, the second communication unit 912, the display unit 92, the operation unit 93, the storage unit 94, and the control unit as functional blocks. It has 95.

The first communication unit 911 is for communicating with the wire feeding device 2 via the signal line 82 inside the relay cable 901. The first communication unit 911 transmits the signal input from the control unit 95 to the wire feeding device 2, and outputs the signal received from the wire feeding device 2 to the control unit 95. In the present embodiment, the case where the first communication unit 911 performs wired communication with the wire feeding device 2 using the signal line 82 will be described, but wireless communication may be performed.

The second communication unit 912 is for communicating with the welding torch 3 via the signal line 82 inside the torch cable 308. The second communication unit 912 transmits the signal input from the control unit 95 to the welding torch 3, and outputs the signal received from the welding torch 3 to the control unit 95. In the present embodiment, the case where the second communication unit 912 performs wired communication with the welding torch 3 using the signal line 82 will be described, but wireless communication may be performed.

The display unit 92 is configured in the same manner as the display unit 32 of the welding torch 3. The display unit 92 displays various types of displays, and includes, for example, a display which is a liquid crystal display device. The display unit 92 is controlled by the control unit 95.

The operation unit 93 is configured in the same manner as the operation unit 33 of the welding torch 3. The operation unit 93 includes a plurality of operation means, and outputs the operation of each operation means by the operator to the control unit 95 as an operation signal. In the present embodiment, as an operation means, the operation unit 93 includes an inching switch for receiving an inching execution operation and a stop operation, and an operation button for receiving an operation for setting a target inching speed and a target value of the inching integrated feeding amount. Have at least.

The storage unit 94 stores information necessary for performing various controls of the relay device 9. In the storage unit 94, the writing and reading of information is controlled by the control unit 95. In the present embodiment, the storage unit 94 stores the target value of the inching integrated feeding amount.

The control unit 95 controls the relay device 9 in various ways. The control unit 95 is realized by, for example, a microcomputer or the like. The control unit 95 performs a predetermined process according to the operation signal input from the operation unit 93. Further, the control unit 95 controls communication by the first communication unit 911 and the second communication unit 912 and display on the display unit 92. As shown in FIG. 10, the control unit 95 includes an inching command unit 952, a setting unit 953, an information acquisition unit 954, and an image creation unit 955.

The inching command unit 952 is configured in the same manner as the inching command unit 352. The inching command unit 952 generates an inching signal when an operation signal corresponding to an inching execution operation is input from the operation unit 93 to the control unit 95. Then, the generated inching signal is transmitted to the wire feeding device 2 via the first communication unit 911. As a result, the wire feeding device 2 feeds the welding wire according to the received inching signal.

The setting unit 953 is configured in the same manner as the setting unit 353. When the operation unit 93 inputs the operation signals corresponding to the various setting operations to the control unit 95, the setting unit 953 performs a predetermined setting process according to the operation signals. In the present embodiment, the predetermined setting process includes a target inching speed setting process, an inching integrated feeding amount setting process, and the like. As a target inching speed setting process, the setting unit 953 generates an inching speed setting signal for setting the target inching speed, and transmits this to the wire feeding device 2. Then, the wire feeding device 2 changes the set value of the target inching speed stored in the storage unit 25 according to the received inching speed setting signal. As a result, the target inching speed is set. As a process of setting the target value of the inching integrated feeding amount, the setting unit 953 changes the target value of the inching integrated feeding amount stored in the storage unit 94. As a result, the target value of the integrated feeding amount of inching is set. In the present embodiment, the setting unit 953 corresponds to the "setting command unit" of the present invention.

The image creation unit 955 displays a display image (FIG. 4) in which the actual feed rate and the integrated inching feed amount acquired by the information acquisition unit 954 and the target value of the integrated inching feed amount stored in the storage unit 94 are displayed (FIG. 4). Refer to) is displayed on the display unit 92.

In the welding system A5, the inching command unit 952 generates an inching signal in response to an operation of the operation unit 93 by an operator (operation of an inching switch provided in the relay device 9). Then, the inching signal is transmitted to the wire feeding device 2. As a result, inching is performed. When the inching is performed, the relay device 9 acquires the actual feeding speed and the integrated feeding amount of the inching from the wire feeding device 2 by the information acquisition unit 954. Then, a display image (FIG. 4) in which the actual feed rate and the integrated inching feed amount acquired by the information acquisition unit 954 by the image creation unit 955 and the target value of the integrated inching feed amount stored in the storage unit 94 are displayed (FIG. 4). (See) is created, and this is displayed on the display unit 92.

According to the fifth embodiment, the feed amount of the welding wire at the time of inching (inching integrated feed amount) is displayed on the display unit 92 of the relay device 9. Therefore, the operator can recognize the integrated feeding amount of the welding wire by looking at the display on the display unit 92. As a result, the operator can perform the inching work while checking the feeding status of the welding wire at the time of inching, so that it is possible to prevent the welding wire from excessively protruding from the tip of the welding torch 3. That is, the same effect as that of the first embodiment can be obtained in the fifth embodiment.

In the fifth embodiment, the relay device 9 shows a case where the information acquisition unit 954 acquires the inching integrated feeding amount from the wire feeding device 2, but the present invention is not limited to this. For example, the control unit 95 of the relay device 9 may calculate the inching integrated feeding amount from the actual feeding speed acquired from the wire feeding device 2. Alternatively, the control unit 95 of the relay device 9 may acquire the rotation speed from the wire feeding device 2 and calculate the actual feeding speed and the inching integrated feeding amount from the acquired rotation speed. Further, as in the second and third embodiments, the welding torch 3 is made to calculate the inching integrated feeding amount, and the control unit 95 of the relay device 9 acquires the inching integrated feeding amount from the welding torch 3. May be good.

In the fifth embodiment, since the integrated feeding amount of inching is displayed on the display unit 92 of the relay device 9, the welding torch 3 does not have to be provided with the display unit 32. Further, in the fifth embodiment, since the relay device 9 is provided with the inching switch and the operation button, the welding torch 3 does not have to be provided with the inching switch 306 and the operation button 307.

In the fifth embodiment, the relay device 9 has a display unit 92 and an operation unit 93, and the welding torch 3 has a display unit 32 and an operation unit 33. Therefore, for example, when the inching execution operation and the inching stop operation are performed using the operation unit 33 of the welding torch 3, the inching integrated feeding amount is displayed on the display unit 32 of the welding torch 3 and the relay device 9 is operated. When the inching execution operation and the stop operation are performed using the unit 93, the inching integrated feeding amount may be displayed on the display unit 92 of the relay device 9.

Next, the welding system A6 according to the sixth embodiment will be described. In the present embodiment, the function of the control unit 24 of the wire feeding device 2 is provided in the welding power supply device 1 instead of the wire feeding device 2. This point is different from the first embodiment. FIG. 11 is a functional block diagram of the welding system A6. As shown in the figure, the welding system A6 differs from the welding system A1 (see FIG. 2) shown in the first embodiment in the following points. The welding power supply device 1 includes a communication unit 11, a control unit 12, and a storage unit 13, and the wire feeding device 2 includes a first communication unit 231 and a second communication unit 232, a control unit 24, and a wire feeding device 2. , The storage unit 25 is not provided.

The communication unit 11 communicates with the communication unit 31 of the welding torch 3 via a signal line 82 provided so as to pass through the wire feeding device 2. Therefore, the signal line 82 in the present embodiment is connected not only between the welding torch 3 and the wire feeding device 2 but also between the wire feeding device 2 and the welding power supply device 1.

The control unit 12 controls the welding power supply device 1. The control unit 12 is realized by, for example, a microcomputer or the like. The control unit 12 includes a drive unit 121, a feed rate calculation unit 122, and a feed amount calculation unit 123.

The drive unit 121 is configured in the same manner as the drive unit 241. That is, the drive unit 121 controls the drive of the feed motor 21. In the present embodiment, as shown in FIG. 11, the control unit 12 of the welding power supply device 1 and the feed motor 21 of the wire feed device 2 are connected by a dedicated signal line 83, and the drive unit 121 is connected to the drive unit 121. A drive signal is input to the feed motor 21 via the signal line 83. In the present embodiment, the inching signal generated by the inching command unit 352 of the welding torch 3 is configured to be transmitted from the welding torch 3 to the welding power supply device 1. Therefore, the inching command unit 352 transmits the generated inching signal to the welding power supply device 1 via the communication unit 31. The drive unit 121 drives the feed motor 21 in response to an inching signal input from the communication unit 31 of the welding torch 3 to the communication unit 11 via the signal line 82.

The feed rate calculation unit 122 is configured in the same manner as the feed rate calculation unit 242. That is, the feed rate calculation unit 122 calculates the actual feed rate from the rotation speed of the feed motor 21. In the present embodiment, as shown in FIG. 11, the control unit 12 of the welding power supply device 1 and the detection unit 22 of the wire feeding device 2 are connected by a dedicated signal line 84, and the feeding speed calculation unit 122. Is input from the detection unit 22 to the rotation speed of the feed motor 21 via the signal line 84.

The feed amount calculation unit 123 is configured in the same manner as the feed amount calculation unit 243. That is, the feed amount calculation unit 123 calculates the inching integrated feed amount from the actual feed rate of the welding wire. In the present embodiment, the feed amount calculation unit 123 calculates the inching integrated feed amount based on the actual feed rate calculated by the feed rate calculation unit 122.

The storage unit 13 stores the integrated inching feed amount and the target inching speed. In the storage unit 13, the writing and reading of information is controlled by the control unit 12.

In the present embodiment, when the inching signal is input from the communication unit 11 in the control unit 12, the following processing is performed. That is, when an inching signal is input from the communication unit 11 to the control unit 12, the drive unit 121 inputs the drive signal to the feed motor 21 via the signal line 83 according to the input inching signal. As a result, the feed motor 21 is driven. When the feed motor 21 is driven, the detection unit 22 detects the rotation speed of the feed motor 21. Since this rotation speed is input to the control unit 12 via the signal line 84, the feed rate calculation unit 122 calculates the actual feed rate from the rotation speed, and the feed amount calculation unit 123 calculates the actual feed rate. Calculate the integrated feeding amount of inching from. The calculated actual feed rate and the integrated inching feed amount are transmitted from the control unit 12 to the welding torch 3 via the communication unit 11.

In the welding system A6 configured as described above, the inching command unit 352 generates an inching signal in response to the operation of the inching switch 306 by the operator. Then, the inching signal is transmitted from the communication unit 31 of the welding torch 3 to the communication unit 11 of the welding power supply device 1 via the signal line 82. The control unit 12 of the welding power supply device 1 drives the feed motor 21 by the drive unit 121 in response to the inching signal received by the communication unit 11, and starts feeding the welding wire. That is, inching is started. When the inching is started, the information acquisition unit 354 acquires the actual feeding speed and the inching integrated feeding amount transmitted from the welding power supply device 1. Then, the image creation unit 355 uses the actual feed rate and the integrated inching feed amount acquired by the information acquisition unit 354 and the target value of the integrated inching feed amount stored in the storage unit 34 during inching. A display image is created and displayed on the display unit 32 (display 304). Inching is performed in this way.

According to the sixth embodiment, the feed amount of the welding wire at the time of inching (inching integrated feed amount) is displayed on the display 304. Therefore, the operator can recognize the integrated feeding amount of the welding wire by looking at the display on the display 304. As a result, the operator can perform the inching work while checking the feeding status of the welding wire at the time of inching, so that it is possible to prevent the welding wire from excessively protruding from the tip of the welding torch 3. That is, the same effect as that of the first embodiment can be obtained in the sixth embodiment.

According to the sixth embodiment, the wire feeding device 2 does not have a circuit configuration (control unit 24) for controlling the feeding motor 21. As a result, the weight of the wire feeding device 2 can be reduced. Further, the wire feeding device 2 generates vibration and dust when the welding wire is fed by the feeding motor 21. This vibration and dust can cause a malfunction of a microcomputer or the like. However, since the wire feeding device 2 is not provided with the control unit 24 configured by a microcomputer or the like, it is possible to suppress a failure of the circuit configuration for controlling the feeding motor 21.

Next, the welding system A7 according to the seventh embodiment will be described. In the present embodiment, the signal lines 83 and 84 are not used but the signal lines 81 are used in the communication between the welding power supply device 1 and the wire feeding device 2. This point is different from the sixth embodiment. FIG. 12 is a functional block diagram of the welding system A7. As shown in the figure, the welding system A7 differs from the welding system A6 (see FIG. 11) shown in the sixth embodiment in the following points. As described above, the welding system A7 does not include the signal lines 83 and 84, but has a signal line 81 connecting the welding power supply device 1 and the wire feeding device 2. Further, the wire feeding device 2 includes a communication unit 230 and a control unit 24. Further, the control unit 12 of the welding power supply device 1 does not include the drive unit 121, and the control unit 24 of the wire feeding device 2 includes the drive unit 241.

The communication unit 230 communicates with the welding power supply device 1 via the signal line 81, and also communicates with the welding torch 3 via the signal line 82. The communication with the welding power supply device 1 performed by the communication unit 230 is performed in the same manner as the first communication unit 231. Further, in the communication with the welding torch 3 performed by the communication unit 230, the same as the second communication unit 232 is performed. Further, the communication unit 230 relays the communication between the welding power supply device 1 and the welding torch 3. A dedicated communication line may be provided between the welding power supply device 1 and the welding torch 3. The communication unit 230 is controlled by the control unit 24. In addition, instead of the communication unit 230, the first communication unit 231 and the second communication unit 232 may be provided as in the first embodiment.

In the present embodiment, the control unit 24 includes a drive unit 241 as described above. When the inching signal is input from the welding power supply device 1 via the communication unit 230, the control unit 24 generates a drive signal corresponding to the inching signal by the drive unit 241 and outputs the drive signal to the feed motor 21. Further, the control unit 24 outputs the rotation speed of the feed motor 21 input from the detection unit 22 to the communication unit 230 and transmits it to the welding power supply device 1.

In the present embodiment, when the inching signal is input from the communication unit 11 in the control unit 12, the following processing is performed. That is, when an inching signal is input from the communication unit 11 to the control unit 12, the control unit 12 transmits the inching signal to the wire feeding device 2 via the communication unit 11. When the wire feeding device 2 receives the inching signal, the wire feeding device 2 drives the feeding motor 21 in response to the received inching signal. Specifically, when an inching signal is input from the communication unit 230 to the control unit 24 in the wire feeding device 2, the drive unit 241 of the control unit 24 generates a drive signal according to the input inching signal. Then, the generated drive signal is input to the feed motor 21 to drive the feed motor 21. When the feed motor 21 is driven, the detection unit 22 detects the rotation speed of the feed motor 21. This rotation speed is output to the communication unit 230 by the control unit 24 and input to the control unit 12 via the signal line 81. Then, the feeding speed calculation unit 122 calculates the actual feeding speed from the rotation speed, and the feeding amount calculation unit 123 calculates the inching integrated feeding amount from the actual feeding speed. The calculated actual feed rate and the integrated inching feed amount are transmitted from the control unit 12 to the welding torch 3 via the communication unit 11.

In the welding system A7 configured as described above, the inching command unit 352 generates an inching signal in response to the operation of the inching switch 306 by the operator. Then, the inching signal is transmitted from the communication unit 31 of the welding torch 3 to the communication unit 11 of the welding power supply device 1 via the signal lines 82 and 81. Further, the control unit 12 of the welding power supply device 1 transmits the inching signal received by the communication unit 11 to the wire feeding device 2 via the communication units 11 and 230. Then, the control unit 24 of the wire feeding device 2 generates a driving signal by the driving unit 241 according to the received inching signal, and outputs the generated driving signal to the feeding motor 21. As a result, the feed motor 21 is driven and the feed of the welding wire is started. That is, inching is started. When the inching is started, the rotation speed of the feed motor 21 detected by the detection unit 22 is transmitted from the wire feed device 2 to the welding power supply device 1 via the communication units 230 and 11. Then, in the welding power supply device 1, the actual feeding speed and the integrated feeding amount of inching are calculated. The information acquisition unit 354 of the welding torch 3 acquires the actual feeding speed and the integrated feeding amount of the inching from the welding power supply device 1. Then, the image creation unit 355 uses the actual feed rate and the integrated inching feed amount acquired by the information acquisition unit 354 and the target value of the integrated inching feed amount stored in the storage unit 34 during inching. A display image is created and displayed on the display unit 32 (display 304). Inching is performed in this way.

According to the seventh embodiment, the feed amount of the welding wire at the time of inching (inching integrated feed amount) is displayed on the display 304. Therefore, the operator can recognize the integrated feeding amount of the welding wire by looking at the display on the display 304. As a result, the operator can perform the inching work while checking the feeding status of the welding wire at the time of inching, so that it is possible to prevent the welding wire from excessively protruding from the tip of the welding torch 3. That is, the same effect as that of the first embodiment can be obtained in the seventh embodiment.

In the seventh embodiment, the case where the welding signal is transmitted from the welding torch 3 to the welding power supply device 1 and then transmitted from the welding power supply device 1 to the wire feeding device 2 is shown, but the present invention is not limited to this. For example, the inching signal may be configured to be transmitted directly from the welding torch 3 to the wire feeding device 2 without going through the welding power supply device 1.

In the seventh embodiment, the case where the communication between the control unit 12 and the detection unit 22 is performed via the signal line 81 is shown, but the present invention is not limited to this. For example, the communication between the control unit 12 and the detection unit 22 may be configured to use a dedicated signal line. In this case, as in the sixth embodiment, the signal line 84 that connects the control unit 12 and the detection unit 22 is provided. Then, the rotation speed is input from the detection unit 22 to the control unit 12 via the signal line 84.

In the seventh embodiment, the case where the control unit 24 of the wire feeding device 2 is provided with the drive unit 241 has been described, but the present invention is not limited to this. For example, instead of the drive unit 241, the control unit 12 of the welding power supply device 1 may be configured to include the drive unit 121. In this case, as in the sixth embodiment, the signal line 83 connecting the control unit 12 and the feed motor 21 is provided. Then, the drive signal is input from the drive unit 121 to the feed motor 21 via the signal line 83.

In the seventh embodiment, the case where the control unit 24 is provided with only the drive unit 241 is shown, but at least one of the feed rate calculation unit 242 and the feed amount calculation unit 243 is further provided. You may. That is, instead of the welding power supply device 1, the wire feeding device 2 may be configured to perform at least one of the calculation of the actual feeding speed and the calculation of the inching integrated feeding amount. Further, the control unit 12 of the welding power supply device 1 may be provided with the feed rate calculation unit 122, and the control unit 24 of the wire feed device 2 may be provided with the feed rate calculation unit 242.

In the sixth and seventh embodiments, the case where the welding power supply device 1 calculates the actual feed rate and the inching integrated feed amount is shown, but the present invention is not limited to this, and the second embodiment is not limited to this. Similarly, the welding torch 3 may be configured to calculate the integrated feeding amount of the inching. Further, as in the third embodiment, the welding torch 3 may be configured to perform both the calculation of the actual feeding rate and the calculation of the inching integrated feeding amount.

In the sixth and seventh embodiments, the case where the display unit 32 (display 304) of the welding torch 3 is displayed to display the inching integrated feeding amount is shown, but the present invention is not limited to this. For example, as in the fourth embodiment, the display unit 26 of the wire feeding device 2 may display the inching integrated feeding amount. Further, similarly to the fifth embodiment, the display unit 92 of the relay device 9 may display the inching integrated feeding amount.

In the first to seventh embodiments, when the detection unit 22 detects the rotation speed of the feed motor 21, and the feed rate calculation unit 242 (357,122) calculates the actual feed rate from the rotation speed. However, the present invention is not limited to this. For example, the detection unit 22 may generate a signal corresponding to the rotation of the feed motor 21, and the feed rate calculation unit 242 (357,122) may calculate the actual feed rate from this signal. Specifically, when the detection unit 22 is composed of a rotary encoder, the detection unit 22 generates an encoder pulse according to the rotation of the feed motor 21. Then, the feed rate calculation unit 242 (357,122) may calculate the actual feed rate from the encoder pulse at predetermined intervals. Alternatively, the detection unit 22 may detect the rotation amount of the feed motor 21, and the feed rate calculation unit 242 (357,122) may calculate the actual feed rate from the rotation amount.

In the first to seventh embodiments, the feed amount calculation unit 243 (356,123) calculates the inching integrated feed amount from the actual feed rate calculated by the feed rate calculation unit 242 (357,123). The case is shown, but the case is not limited to this. For example, the integrated feeding amount of inching may be calculated from the rotation speed detected by the detection unit 22. Further, as described above, when the detection unit 22 generates an encoder pulse (or rotation amount information) instead of the rotation speed, the feed amount calculation unit 243 (356,123) causes the encoder pulse (or rotation amount). Information) may be used to calculate the integrated feeding amount of inching.

The display device according to the present invention, the welding torch including the display device, the wire feeding device including the display device, and the relay device including the display device are not limited to the above-described embodiments. The specific configuration of each part of the display device of the present invention, the welding torch including the display device, the wire feeding device including the display device, and the relay device including the display device can be freely redesigned.

A1 to A7: Welding system 1: Welding power supply device 11: Communication unit 12: Control unit 121: Drive unit 122: Feeding speed calculation unit 123: Feed amount calculation unit 13: Storage unit 2: Wire feeding device 201: Wire Reel 202: Connector 21: Feed motor 22: Detection unit 230: Communication unit 231: First communication unit 232: Second communication unit 24: Control unit 241: Drive unit 242: Feed speed calculation unit 243: Feed amount calculation Unit 244: Inching command unit 245: Setting unit 246: Image creation unit 25: Storage unit 26: Display unit 27: Operation unit 3: Welding torch 301: Torch body 301a: Nozzle 302: Handle 303: Control board 304: Display 305: Torch switch 306: Welding switch 307: Operation button 307a: Up button 307b: Down button 307c: Left button 307d: Right button 308: Torch cable 31: Communication unit 32: Display unit 33: Operation unit 34: Storage unit 35: Control unit 351: Welding command unit 352: Inching command unit 353: Setting unit 354: Information acquisition unit 355: Image creation unit 356: Feed amount calculation unit 357: Feed speed calculation unit 41, 42: Power cable 5: Power transmission line 6 : Gas bomb 7: Gas piping 81, 82, 83, 84: Signal line 9: Relay device 901: Relay cable 902: Connector 911: First communication unit 912: Second communication unit 92: Display unit 93: Operation unit 94: Storage Unit 95: Control unit 952: Welding command unit 953: Setting unit 954: Information acquisition unit 955: Image creation unit P: Power system W: Work piece

Claims (12)

A display device for a welding system having a wire feeding device equipped with a feeding motor for feeding the welding wire to the welding torch.
An operation unit that accepts inching execution operations and stop operations,
When the operation unit receives the execution operation of the inching, the inching command unit that commands the drive of the feed motor and the inching command unit
A display unit that displays the cumulative feed amount of the welding wire from the time the inching is started, and
A display device comprising. The display unit displays the integrated feed amount by graphic display.
The display device according to claim 1. The display unit further displays the target value of the integrated feed amount.
The display device according to claim 1 or 2. The integrated feed amount is set to an initial value when a predetermined condition is satisfied after the start of inching.
The display device according to any one of claims 1 to 3. A setting command unit for commanding the setting of the target feeding speed of the welding wire at the time of inching is further provided.
The display device according to any one of claims 1 to 4. It also has an information acquisition unit that acquires the total amount of feed.
The display unit displays the integrated feed amount acquired by the information acquisition unit.
The display device according to any one of claims 1 to 5. An information acquisition unit that acquires the actual feed rate, which is the feed rate of the welded wire that is actually being fed, and
It further includes a feed amount calculation unit that calculates the integrated feed amount from the actual feed rate acquired by the information acquisition unit.
The display unit displays the integrated feed amount calculated by the feed amount calculation unit.
The display device according to any one of claims 1 to 5. An information acquisition unit that acquires the rotation speed of the feed motor,
A feeding speed calculation unit that calculates the actual feeding speed of the welding wire from the rotation speed acquired by the information acquisition unit, and
It further includes a feed amount calculation unit that calculates the integrated feed amount from the actual feed rate calculated by the feed rate calculation unit.
The display unit acquires the integrated feed amount calculated by the feed amount calculation unit.
The display device according to any one of claims 1 to 5. The information acquisition unit acquires from either the welding power supply device that supplies welding power or the wire feeding device.
The display device according to any one of claims 6 to 8. A welding torch comprising the display device according to any one of claims 1 to 9. A wire feeding device comprising the display device according to any one of claims 1 to 9. A relay device that is arranged in the middle of the induction path of the welding wire from the wire feeding device to the welding torch and relays the feeding of the welding wire.
A relay device including the display device according to any one of claims 1 to 9.

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