JPS5938079B2 - Self-propelled semi-automatic welding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a semi-automatic welding machine, in which a hand torch is held along a base material by a traveling device having a particularly simple structure so that it can be rotated and rotated in a free direction. The present invention relates to a self-propelled semi-automatic welding machine that allows even a person to easily obtain good welds.

Conventionally, in semi-automatic welding operations such as CO2 welding, an operator moves a welding torch along a welding line while maintaining a constant distance between the workpiece and the tip of the torch nozzle.

Although this welding work is convenient because the torch can be handled manually, it requires the tip of the torch nozzle to be kept at a certain distance from the surface of the material to be welded and moved at a constant speed, which not only requires skill but also causes fatigue. Furthermore, it is extremely difficult for even experienced welders to perform good welding continuously for a long period of time. Therefore, it has been proposed to provide a hand torch with supporting running wheels, and these running wheels have been proposed to be constructed with one or two wheels (including cases with auxiliary wheels). However, the one-wheeled one simply supports the weight of the hand torch, making it unstable to run, and has the disadvantage that a stable and good weld bead cannot be obtained. In addition, although the two-wheeled type can run stably, since it does not have a drive device or a rudder, it is difficult to follow the welding line and to stably match the running direction. Furthermore, it was not possible to pull the entire traveling device to one side and make it follow the weld line, as in fillet welding. Therefore, the present invention eliminates the drawbacks of the conventional semi-automatic welding machine and the previously proposed self-propelled semi-automatic welding machine, is simple and easy to handle, and furthermore, the traveling device follows the rotation and rotation of the torch so that the traveling device can move in the torch pointing direction. The purpose is to provide a self-propelled semi-automatic welding machine that can be moved. However, such a semi-automatic welding machine is a semi-automatic welding machine in which a dolly device that supports a hand welding torch is equipped with front wheels and rear wheels, at least one of which is a drive wheel, and the front wheel turns and rotates on a horizontal plane. The front wheel is configured to turn and rotate following the displacement of the welding torch. In addition, in such a welding machine, the displacement of the welding torch includes rotation and turning, and the structure is such that these rotations and turning positions can be fixed at free positions, and the welding torch cannot be rotated in a vertical plane. This includes a configuration in which the rotation of the front wheel for scooping can also be freely adjusted when carrying out. The present invention will be described in detail below based on the drawings, but the drawings show one example of specific implementation of the present invention, and the present invention is not limited to these examples. It can be implemented in the same way even if the shape is changed or the component parts or design are changed.

Furthermore, the embodiments described in the claims do not limit the present invention. Fig. 1 is a side view of the semi-automatic welding machine of the present invention, Fig. 2 is a front view of the welding machine on the left side of Fig. 1, and Fig. 3 is a rear view of the welding machine as seen from the right side of Fig. 1. The device section is shown broken away.

FIG. 4 is a plan cross-sectional view taken along the cutting line - in FIG. 1 in the direction of the arrow. In these figures, the welding machine is composed of a welding torch 1, a traveling drive section 2, and a torch mounting section 3 (Fig. 1).
The welding torch 1 may be a conventional hand welding torch or an improved version thereof. The figure shows grasping part 4
An example is shown in which a switch box 6 is provided on the side. A cable 5 is connected to the grasping portion 4 and a torch switch 4' is provided. Further, the switch box 6 is provided with a switch 7 for starting the traveling device and for changing the traveling direction, which will be described later, and a polyurethane knob 8 for adjusting the traveling speed. A bent nozzle pipe 11 is fixed in front of the grasping part 4, and a nozzle 10 is attached to the tip thereof. Such a hand welding torch is removably fixed to a torch clamper 12 provided at the front of the torch mounting portion 3. A low-voltage power cord 9 is connected to the switchbox 6, and a traveling device drive cord 16, which will be described later, extends therefrom, and is attached to the gripping section 4 by screwing it onto the gripping section 4 via a mounting member 6'. . On the other hand, the traveling drive unit 2 is composed of a front wheel 28 and a rear wheel 25, and constitutes a traveling bogie device. The wheel 25 is shown configured as a driving wheel, and the following description will focus on this, but either one of these wheels 28 and 25 may be configured as a single wheel, or the front wheel may be the driving wheel. can.

Reference numeral 13 denotes a frame of the travel drive unit, on which the drive shafts 21 of the drive wheels 25, 25 are loosely supported, and within the frame 13 a drive device is built.

These drive devices can be configured in any suitable combination, but in the illustrated example, a wall plate 14 is fixed within the framework 13 and a drive motor 15 is attached thereto.
The drive shaft 21 is driven (FIGS. 1 and 3). That is, it is recommended that the motor 15 be a DC type low voltage motor. Then, the bevel gear 17 fixed to the motor shaft and the bevel gear 19 fixed to the counter shaft 18 loosely supported on the frame 13 are engaged to rotate the counter shaft 18, and the sprocket wheel 20 fixed to the counter shaft 18 is rotated. A sprocket 23 provided on a differential device 22 provided on the drive shaft 21 is connected by a chain 24, and the drive shaft 21 is rotated.
Drive wheels 25, 25 fixed at both ends of the motor are rotated. The drive wheel 25 is preferably provided with a friction material such as an elastic material on its circumferential surface. 26 is a heat shield plate.

At the upper part of the framework 13 constructed in this way, a pivot 2r is fixedly formed on the front wall thereof, and a support 31 of a front rudder wheel 28 is provided to pass through the pivot 27.

As described above, the front wheels 28 are constructed in pairs, each forming a spherical running surface to facilitate the rudder rotation, and each is fixedly or loosely supported on a support shaft 29. Further, the support shaft 29 is provided with a bearing member 30 at its intermediate portion and is loosely or fixedly provided, and the bearing member 30
A support column 31 is fixedly installed on the top of the (FIG. 9). Therefore, by rotating the support 31, the front wheel 28 can be rotated in the scooping direction. In addition, when attaching the support 31 to the pivot 27 which is provided through the support, if the support 31 is fixed to the pivot 27, it will not be able to be rotated, and if it is loose, it will be able to rotate in the free direction. A set hoop 48 is arranged in the groove part of 27, and the set hoop 48 is attached to the support 31.
8 (FIG. 10), it should be understood that the support column 31 can stably support the travel drive device 2 and rotate freely. On the other hand, the torch mounting portion 3 is connected to the framework 13.
A pivot bracket 32 is fixed to the pivot support 27 and is provided with the levering post 31 of the front wheel 28 as a pivot, a slider 34 fixed to the pivot bracket 32, and a slider 34 provided on the slider 34 so as to be movable up and down. The welding torch mounting clamp 12 is provided with the welding torch mounting clamper 12, and a bracket 40 is attached to the torch mounting seat 38.

The bracket 40 and the torch mounting seat 38 are configured to be fixed to each other or to be fixed by rotating the bracket 40. The figure shows these attachments fixed. In addition, the torch mounting seat 38 and the slider 34
This means that a support part 39 integrally formed with a mounting seat 38 is provided on the slider 34 so as to be able to move up and down, and the slider 34 has guide rods 35, 35 fixed thereon, and a screw shaft 36 arranged in parallel in the middle part thereof. , the support portion 39 is slidable and screwed onto the screw shaft 36, and the screw shaft 36
6, the support portion 39 is slid (FIG. 8).
Note that 36' is a rotating handle provided at one end of the screw shaft 36. In the torch mounting part 3 configured in this way,
By operating the handle 36' of the slider 34, the distance between the tip of the held welding torch nozzle 10 and the workpiece can be finely adjusted.

The pivot bracket 32 supported by the pivot bracket 27 is
A set screw 33 (Fig. 1) is attached to the support bracket 31 so as to be freely rotatable in any direction, and is provided on the pivot bracket side.
When engaging and fixing the holding torch 1 with the support column 31, the torch mounting portion 3 of the holding torch 1 can be rotated in a free direction around the pivot portion of the support support, and the support torch 31 is also rotated in accordance with this rotation. As shown in FIG. 5, the front wheels 28 are rotated. That is, following the rotation (rotation) of the torch, the front rake wheel is rotated in the pointing direction. In addition, when a weld line is provided on a part other than the lower part of the traveling device 2 by downward butt welding, etc., and it is necessary to fix only the torch mounting member 3 by twisting it as shown in FIG. In this case, a set screw 2r' is provided on the pivot part 27 (Fig. 6).
It is also possible to maintain the front wheel 28 in a specific relationship and configure only the pivot bracket 32 to be freely rotatable. When it is necessary to fix and hold the rotation position, use the setscrew 33 or the retaining screw 37' provided on the top surface of the pivot bracket 32 to hold the pivot bracket 27 at a specific position, or fix the pivot bracket 32 in a fixed position. If the supporting column 31 is held at a specific position, only the torch 1 can be held at a specific firing position (FIG. 7). In this apparatus configured in this manner, the holding welding torch 1 can be rotated relative to the traveling drive unit 2 only in a horizontal plane, and is mainly used for downward welding, and weeping is also performed only in a horizontal plane. However, the semi-automatic welding machine may be required to be able to rotate freely in a plane perpendicular to the travel drive unit 2. For these purposes, the torch clamper 12 holding the welding torch 1 can be configured to be rotatable on the bracket 40, but this can also be applied particularly to horizontal fillet welding, and furthermore, this rotation can also be fixed in a free position. In order to achieve this, it is recommended that these rotations be made by the slider 34 and the bracket 32. The invention therefore also includes these pivoting means as well as fixing means at appropriate positions. That is, FIG. 8 shows an example of this, in which the projecting member 31 is fixed to the back surface of the slider 34 mentioned above. ．． Both have holes 3 in which the protruding member 34' fits into the bracket 32? are provided, and these are fitted to form the slider 3.
4 along the bracket 32, and a set screw 37 is provided on the bracket 32. Therefore, the slider 34 can rotate in the free direction and can be fixed at the free position by tightening the set screw 37. Further, by loosening the set screw 3r, the held contact torch 1 can be freely rotated and rotated. The rotation fixing set screw 2r' for fixing these at a specific position is called a first fixing device, and the set screw 37 for fixing rotation is called a second fixing device, and one or both of these may be used depending on the use. Fixed or open for use. Note that it is recommended that the projecting member 31 provided on the slider 34 be provided with a set screw fitting groove on the circumferential surface. FIG. 9 is a front view when this machine is used for horizontal fillet welding, in which the slider 34 is tilted and the first,
The position of the nozzle 10 can be finely adjusted using the slider 34.

Further, in fillet welding, it is recommended to install a guide roller 42 in order to make the travel drive device 2 travel along the vertical plate or side plate, and the guide roller 42 connects the arm rod 41 to the frame 13 of the travel drive unit 2. Attach it and rest on this tip. When the torch 1 is arranged in this way and weeping is required, it is sufficient to create play in the first and second fixing devices. The engagement hole may be made larger or formed with a stepped portion. Further, in the semi-automatic welding machine of the present invention, it is recommended that the front rake wheel 28 be oriented in the direction of rotation even when the torch is rotated within the vertical plane, and especially when rotating the torch in the vertical plane, When performing fillet welding and using guide rollers 42, extremely stable fillet welding can be achieved by setting the running direction of traveling drive device 2 so that guide rollers 42 always follow the workpiece.

Therefore, the construction is such that the front wheel 28 for taking out the rake is rotated toward the upright plate side even if it follows the rotation. Various means are conceivable for these devices, but it is preferable that they have a simple configuration and that the displacement ratio can be freely changed. It is configured so that the front wheel 28 for scooping can be rotated not only for rotation but also for application.A mounting ring seat 45 is attached to the nozzle 10, and an operating rod mounting portion 46 is formed on the ring seat 45. Attach the L-shaped operating rod 4r to this. In addition, the front wheel 28
The rotating support 31 is free to rotate, and the mounting seat 4 is attached to the support 31.
3 is attached, and a slit arm rod 4 is attached to the mounting seat 43.
Fix 4. Then, the bent portion of the L-shaped operating sweat 47 is fitted into the slit of the slit arm rod 44. The slit arm rod 44 is made of thin material and the L-shaped rod 47 is made of a round bar, so that when the torch 1 is rotated, the front wheel is turned in synchronization with the direction of rotation of the torch 1. For L-shaped rod 4
7 and the slit arm lever 44 slide relative to each other, allowing the front wheel 28 to be rotated in the rotational direction. These displacement turning amounts can be freely adjusted by selecting the mounting ring seat 45, the mounting seat 43, and the L-shaped rod 47. If necessary, the torch 1 may be configured for rotation only, and the front wheel 28 for rudder removal may be configured to be directly connected. Figure 11 shows an example of this, especially the framework 13.
A box part 49 is formed on the front side of the top of the box part 49, and the rotation support 31 of the front wheel 28 is freely supported in this box part 49. The figure shows a thin shaft part 3 at the top of the support 31.
This shows what V is formed on. On the other hand, on the back side of the slider 34 constituting the torch mounting portion 2, a support shaft 50 is fixedly provided in place of the protrusion 34' as shown in FIG.
The bevel gear 51 is fixed to the tip of the bevel gear. Further, a bevel gear 52 is fixed to the thin shaft portion 31' of the rotating support 31, and these bevel gears are meshed with each other. With this configuration, the slider 34 also rotates as the torch 1 rotates, and the front wheel 28 can be rotated in the raking direction via the gear. These displacement turning ratios are appropriately selected and determined, and the teeth of the bevel gears 51 and 52 are determined. In the second fixing device configured as described above, an arcuate seat 53 formed around the core axis of the support shaft 50 is provided at the lower part of the front wall of the box part 49, and the arcuate seat 53 is provided on the back surface of the lower part of the slider 34. A protruding piece 54 is formed along the surface of the protruding piece 54, and a set screw 55 is provided on the protruding piece 54, so that it can be fixed at an appropriate position within the rotation range in the same way as the set screw 37. In addition, the self-propelled semi-automatic welding machine configured in this manner can be placed directly on the surface of the workpiece to be welded and run as described above, or it can be placed on the flat part of the mounting base on which the workpiece is placed and fixed. However, if the running surface is uneven or there are obstacles and the tension of the torch is unstable, it is possible to install a separate running surface rail and run it. can.

Furthermore, prepare a dedicated guide rail for this automatic welding machine, and arrange the work to be welded along the guide rail, or arrange the guide rail on the work to be welded and use this automatic welding machine. You can also do that. FIG. 12 to FIG. 14 show an example of this, and show a case where a cover plate 57 is welded to the opening side of an H-beam 56 as a member to be welded. In other words, in such a case, edge welding is performed and the cover plate 57 is welded as shown in FIG.
are temporarily fixed or temporarily welded 57a. It is reasonable to weld the edge portion 58 in a downward position, and in such edge welding, the first guide rail is used as the guide rail.
The one shown in Figure 4 is recommended. That is, in order to perform downward welding on the edge portion 58, the H-beam 56 to which the cover plate 57 has been temporarily attached is moved to the welded portion 58 using a suitable jig or holding device.
is held in the upward position. In the guide rail 59, a slit 59a is formed along the welding line direction in the central part of the flat plate forming the running surface, and leg walls 59b are formed on the lower surface side of the slit 59a, and the corner part of the H-shaped steel 56 is formed with leg walls 59b. Place it so that the running surface is almost horizontal. The figure shows the leg wall 59b.
are shown in contact with the H-shaped steel 56 and the cover plate surface, respectively, but it is also possible to provide a magnetic attraction holding member at an appropriate position on the leg wall 59b side to stably support it, or to use a mounting and fixing member. It can also be installed. When the semi-automatic welding machine of the present invention is placed on the guide rail flat plate and welded, edge welding can be performed extremely efficiently. The figure shows an automatic welding machine with front wheel 28, drive wheel 25, and nozzle 1.
It is abbreviated as 0 etc. The self-propelled semi-automatic welding machine of the present invention configured as described above (1) can maintain a constant distance between the surface to be welded and the torch nozzle (workpiece tension) and can obtain a constant welding speed, so no skill is required. , good welding is possible even with unskilled hands.

(2) Since the torch is held by a traveling device such as a truck, welding work can be performed continuously for a long time with less fatigue.

(3) In semi-automatic welding of long objects, the bead is disturbed when the worker moves his or her body, but when the welding machine of the present invention is used, the torch is held in the traveling device and stabilized even when the worker moves. The machine runs smoothly and produces stable and good welding.

(4) Since the torch holding cart device is provided with a rudder device that follows the rotation of the torch, it is possible to easily align the traveling direction of the cart device along the welding line.

Furthermore, since the weeping mechanism of the torch is connected to the welding wheel, it is possible to carry out the welding while weeping, making it possible to use it as a semi-automatic welding machine ideal for butt welding. (5) It is very easy to switch between downward and horizontal fillet welding, and it can be used as a general-purpose welding machine, and the oscillator can be freely operated manually, resulting in good welding.

You can enjoy benefits such as:

[Brief explanation of drawings]

Fig. 1 is a side view of the welding machine of the present invention, Fig. 2 is a front view, and Fig. 3 is a side view of the welding machine of the present invention.
The figure is a rear view, and the side and rear views are partially cut away to show the drive device. Fig. 4 is a plan cross-sectional view taken along the cutting line - in Fig. 1 in the direction of the arrow, Figs. 5 and 7 are explanatory diagrams of the operation in Fig. 4, and Fig. 6 is a part of Fig. 1 and shows another configuration example. FIG. 8 is a configuration explanatory expanded sketch showing another example of the configuration of the torch mounting part. FIG. 9 is a front view of the operation explanatory diagram of FIG. 2 with other devices added. FIG. 10 11 is a side view showing another configuration example of the present invention, and FIG. 11 is also a side view illustrating another configuration of the present invention, with main parts cut away. FIGS. 12 to 14 are explanatory sketches showing examples of welding application of the apparatus of the present invention. 1: Torch, 2: Traveling drive device, 3: Torch mounting section, 4: Vaginal grip section, 5: Cable, 6
: Switch box, 7: Travel switch, 8: Travel speed adjustment knob, 10: Nozzle, 11: Nozzle pipe, 12:
Torch clamper, 13: Framework, 14: Wall plate, 15: Motor, 18: Counter shaft, 21: Drive shaft, 22: Differential, 24: Chain, 25: Drive wheel, 26: Heat shield, 27: Pivotal support , 28: Front wheel, 29: Support shaft, 31:
Post, 32: Pivot bracket, 33: Set screw, 34:
Slider, 3r: Set screw, 38: Torch mounting seat, 39
: Support part, 40: Bracket, 41: Arm rod, 42: Guide roller, 43: Mounting seat, 44: Slit arm rod, 45: Mounting ring seat, 47: L-shaped operating rod, 48: Set hoop, 49
: Box part, 50: Support shaft, 53: Arc-shaped seat, 54: Projection part, 5
6: H-beam, 57: Cover plate, 58: Edge, 5
9: Guide rail.

Claims (1)

[Scope of Claims] 1. A self-propelled semi-automatic welding machine that runs while holding a welding torch, wherein front and rear wheels are provided at the front and rear of the welding machine, and at least one of the front and rear wheels is a drive wheel, The center of rotation of the front wheel and the center of rotation of the welding torch in a horizontal plane are arranged concentrically so that the front wheel turns and rotates in the horizontal plane following the rotation of the welding torch in the substantially horizontal plane. , a first fixing device is provided for fixing the pivoting of the pivoting column to the pivoting column at an appropriate position; A second support bracket is connected to the torch support slider so as to be freely rotatable in a vertical plane, and the torch support slider is fixed at an appropriate position from rotation with respect to the support bracket.
A self-propelled semi-automatic welding machine characterized by being configured with a fixing device. 2. The semi-automatic welding machine according to claim 1, wherein the front wheel and the rear wheel are configured such that the rear wheel is a driving wheel and the front wheel is a rudder driven wheel. 3. In claim 1 or 2, the semi-automatic welding machine is for downward butt welding and horizontal fillet welding. 4. The semi-automatic welding machine according to any one of claims 1 to 3, wherein the welding torch is configured to be adjustable up and down via a slider. 5. In any one of claims 1 to 4, the first fixing device is arranged at a pivot support of a front wheel, and a support bracket of a welding torch holding device pivotally supported by the support, and a support bracket disposed at the pivot support. A semi-automatic welding machine consisting of a locking member. 6. In any one of claims 1 to 5, the second fixing device includes a projection formed on the back surface of the torch support slider that is fitted into an insertion hole formed in the support bracket. A semi-automatic welding machine configured to engage and fix the protruding circular part with a set screw provided on the bracket. 7 In a self-propelled semi-automatic welding machine that runs while holding a welding torch, a front wheel and a rear wheel are provided at the front and rear of the welding machine, at least one of the front and rear wheels is a driving wheel, and the welding torch is substantially perpendicular to the welding torch. The front wheel is constructed so that it turns and rotates in a horizontal plane following the rotation in the plane, and also includes a fixing device that fixes the rotation of the welding torch in an approximately vertical plane at an appropriate position. A self-propelled semi-automatic welding machine featuring: 8. The semi-automatic welding machine according to claim 7, wherein the front wheels and the rear wheels are configured such that the rear wheel is a driving wheel and the front wheel is a rudder driven wheel. 9. In claim 7 or 8, the semi-automatic welding machine is a semi-automatic welding machine for downward butt welding and horizontal fillet welding. 10 In claims 7, 8, and 9, the means for turning and rotating the front wheel in a horizontal plane following the rotation of the welding torch in a vertical plane includes an arm rod provided on the torch nozzle and a front wheel rotation. A semi-automatic welding machine that uses a structure in which arm rods installed on a moving column are connected to each other. 11 In claim 7, 8, or 9, the means for turning and rotating the front wheel in a horizontal plane following the rotation of the welding torch in the vertical plane is an umbrella provided at the axis of the torch mounting rotating member. A semi-automatic welding machine with a configuration in which a gear and a bevel gear provided on the front wheel rotation support are engaged.