JPH0649212B2 - Rewinding method of strip and its equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a strip of a preceding coil and a coil of a following coil in an inlet side process such as an electric resistance welded pipe, a welded steel manufacturing facility or a steel plate processing facility. TECHNICAL FIELD The present invention relates to a strip rewinding method and equipment capable of automatically performing a rear end treatment of a preceding coil when joining strips.

<Prior art> In manufacturing equipment such as electric resistance welded steel pipe and continuous annealing equipment for steel sheet, it is inefficient to process each coil and it takes a lot of time and manpower to pass the coil tip. In the entry side process, the strip steel end of the preceding coil and the strip steel starting end of the trailing coil are joined by welding or the like, and the strip steel is processed continuously.

When joining the strip steel, stop the strip steel of the preceding coil so that the end part is located at the cutting position, cut the uneven part of the strip steel end with a cutting machine, and then move this strip steel end to the joining position. After feeding and waiting, the trailing coil is unwound at the same time, the uneven portion of the strip steel starting end is cut, and then it is sent to the joining position, and the strip steel end of the preceding coil and the strip steel starting end of the trailing coil are crossed. It is joined by a splicer.

On the other hand, in the continuous processing equipment on the outlet side, the strip steel is fed out by the looper equipment for the strip steel arranged between the inlet side equipment and the predetermined speed regardless of the passage stop or speed change in the inlet side process. The continuous processing is performed at.

In such an entry-side process, it is necessary to quickly join the leading strip steel and the trailing strip steel from the viewpoint of the capacity of the looper equipment. It is difficult to speed up the start, cutting, and horizontal setting of the starting end of the trailing strip steel, and it is difficult to speed it up. Therefore, it is desired to speed up the termination process of the preceding strip steel, which is a relatively simple work.

Conventionally, the following method has been proposed as a rewinding method at the end of the coil.

JP-A-1-166818 discloses an image sensor that detects a side surface shape of a coil central portion of a payoff reel, analyzes a signal from the image sensor, and then an uneven image of the coil side surface (a dark portion between strips is concave). ) Is created, the remaining number of coil turns is measured based on this image, and when this remaining number of coil turns matches the preset number of coil turns at the start of deceleration, a deceleration command is output to the entry side control device to automatically decelerate. Is a way to do.

This is a plate length measuring device for measuring the length of a strip steel behind a splicing welder of each line in equipment having two or more coil rewinding lines for H-section steel or the like. The strip length measuring device is used to measure the strip steel length from the start of operation, the line operation is stopped at the required length position, and the strip length is adjusted by cutting with a cutting machine. This is the method.

<Problems to be Solved by the Invention> However, the method (1) has the following problems.

(a) It requires an image sensor and image processing, which increases equipment costs.

(b) Since it is detected by the unevenness image, it is difficult to analyze when the winding shape of the coil is good, and especially in the case of a thin plate, the difference in the number of windings leads to the difference in length, and the accuracy of reliability is low.

(c) The purpose is to decelerate in advance near the end of the coil, and it can be used even if the accuracy is somewhat poor, but it can not be used for control that grasps the end of the coil accurately and quickly performs the end process of the coil. .

Also, the method (1) has the following problems.

(a) There is an error in the plate length measuring device, and it is not accurate in grasping the end of the coil. In particular, in the case of a long coil, the error is integrated. For example, even if the error is 1%, the error of 10 m appears in the coil of 1000 m.

(b) Therefore, when trying to terminate the coil, one person visually confirms the end of the coil and one person cuts the coil end →
Feeding to the horizontal splicing machine → Preparing for horizontal splicing, another person will start next coil, leveling, start end cutting, and perform horizontal splicing machine feed, and then perform horizontal splicing, etc. Will be needed. Further, when the above-mentioned work is performed by one person, it takes time, and it is necessary to lengthen the looper accordingly, resulting in a high equipment cost.

The present invention has been made to solve the above-mentioned problems, and an object thereof is to accurately grasp the strip plate start end of the preceding coil by a relatively simple and inexpensive device configuration, and to perform strip steel end treatment. An object of the present invention is to provide a method of rewinding a winding plate that can be automatically performed and its equipment.

<Means for Solving the Problem> A first rewinding method of the present invention is, as shown in FIG. 1, a stripping machine S ₁ rewound from an uncoiler device 1, a cutting machine 3, and a horizontal splicing machine 4. passed through in order, delivery upon sending to the next step by the pinch rolls 6, detects that missing end of the strip S ₁ from uncoiler device 1 is driven to rotate at a tension of the strip S _1, the first end detection signal To switch the speed V of the delivery pinch roll 6 to a constant speed V ₀ , and then
The time t ₁ required to detect the end of the strip S _{1 on} the entrance side of the cutting machine 3 and move between the devices,
After setting t ₂ and t ₃ in advance, the feed pinch roll 6 is stopped after the set time t ₁ , t ₂ and t _{3 has} elapsed after receiving the second end detection signal or the work completion signal of each device. It is designed such that predetermined work such as end cutting is performed.

As shown in FIG. 1, the first unwinding equipment of the present invention allows the strip plate S ₁ unwound from the uncoiler device 1 to pass through the cutting machine 3 and the transverse splicing machine 4 in this order, and by the delivery pinch roll 6. in equipment sending to the next step, provided uncoiler apparatus 1 which may be rotated by tension of the strip S _1, the first end detection sensor 7 capable of detecting that the missing end of the strip S ₁ from uncoiler device 1 And a second end detection sensor 8 installed on the entrance side of the cutting machine 3 and capable of detecting the end of the strip S _1.
And the time t ₁ , t ₂ required for switching the speed V of the sending pinch roll to a constant speed V ₀ by the first end detection signal from the first end detection sensor 7 and moving the strip end between the devices. , T ₃ are set, and the set time t _{1 is} set after the second end detection signal from the second end detection sensor 8 or the work completion signal of each device is received.
A control device 10 for stopping the delivery pinch roll 6 after t ₂ and t ₃ has been provided.

The first end detection sensor 7 may detect the stop of the mandrel 11 due to passing through the end of the coil C from the mandrel 11 as shown in FIGS. 3 to 6, or as shown in FIG. Alternatively, it may be one that detects the expansion of the mandrel 11 or one that directly detects the end of the coil C as shown in FIG.

In the second rewinding method of the present invention, as shown in FIG. 2, the strip S ₁ rewound from the uncoiler device 1 is passed through the cutting machine 3 and the horizontal splicing machine 4 in this order, and is fed by the delivery pinch roll 6. When sending to the next process, the end of the strip S ₁ is detected between the uncoiler device 1 and the cutting machine 3, and the moving distance of the strip S ₁ is measured in the vicinity of the delivery pinch roll 6.
The movement distances after receiving the end detection signal or the work completion signal of each device are set distances l ₁ , l ₂ , l between the devices.
_When the number reaches ₃ , the feeding pinch roll 6 is stopped and a predetermined work such as cutting the end is performed.

As shown in FIG. 2, the second unwinding equipment of the present invention passes the strip S ₁ unwound from the uncoiler device 1 through the cutting machine 3 and the horizontal splicing machine 4 in this order, and by the delivery pinch roll 6. in equipment sending to the next step, the movement of the uncoiler apparatus 1 and the cutting machine and end detection sensor 8 that can detect the end of the installed strip S ₁ between the 3, feed belt disposed near plate S ₁ pinch rolls 6 Length measuring device 9 capable of measuring distance
And the moving distance after receiving the end detection signal or the work completion signal of each device is a set distance l ₁ between each device,
A control device 10 is provided to stop the delivery pinch roll 6 when reaching l ₂ and l ₃ .

<Operation> In the first invention, when the end of the strip S ₁ comes out of the uncoiler device 1, the first end detection sensor 7 detects it and the first end detection signal synchronizes with the speed of the next process. The speed V of the feeding pinch roll 6 being operated is switched to the constant speed V ₀ . The delivery pinch roll 6 is operated at this constant speed V ₀ until the bead is removed after the horizontal connection.

The end of the strip S ₁ that is being continuously sent out by the sending-out pinch roll 6 is detected at the entrance side of the cutting machine 3 by the second end detection sensor 8 and a set time t ₁ is reached after the second end detection signal is obtained. The delivery pinch roll 6 is stopped, and the end of the strip plate is cut. The feeding speed of the strip S ₁ is constant at V ₀ , and the time t ₁ required for the end of the strip to move from the second end detection sensor 8 to the cutting machine 3 at this constant speed V ₀ is set by a timer. Thus, the end of the strip plate can be automatically positioned at the cutting position and the cutting can be performed automatically.

At the same time, the feed pinch rolls 6 are stopped after the set times t ₂ and t ₃ after the cutting completion signal or the transverse connection completion signal is obtained, and the feeding to the transverse connection device 4 or the removing device 5 is automatically performed.

In the present invention, the operator sets the end of the trailing coil C ₂ , which is difficult to find, cuts, and sets the horizontal joint, and cuts the trailing end of the preceding coil C ₁ prior to the processing of the leading end of the trailing coil C _2. , The horizontal joint feed is automatically performed, and the bead removal and looper feed after the horizontal joint are automatically performed.

Next, in the second invention, the end of the strip S ₁ that has passed through the uncoiler device 1 is detected by the end detection sensor 8, the moving distance of the strip S ₁ is measured by the length measuring device 9, and the end detection signal is output. When the moving distance after receiving reaches the set distance l ₁ between the end detection sensor 8 and the cutting machine 3, the delivery pinch roll 6
Is stopped and the end of the strip is cut.

Similarly, when the moving distance after obtaining the cutting completion signal or the transverse joint completion signal reaches the set distances l ₂ and l ₃ , the feed pinch roll 6 stops and the feeding to the transverse joint machine 4 or the bead removing device 5 is performed. Is done automatically.

Since the moving distance of the strip S ₁ is directly measured, the timer as in the first invention is not necessary, the distance to be measured is short, and the error does not accumulate, so that the error of the length measuring device 9 can be ignored.

<Example> Hereinafter, the present invention will be described based on illustrated examples.
FIG. 1 is a first embodiment of the present invention, in which the inlet side equipment is, in order from the upstream side, an uncoiler device 1, a leveler device 2, a shear cutting machine 3, a transverse splicing machine 4 such as a flash butt welding machine, and bead removal. The apparatus 5 and the delivery pinch roll 6 are arranged.

The uncoiler device 1 includes a coil C as shown in FIG.
Mandrel 11 on which the mandrel 1 is mounted, and the mandrel 1
1 is composed of a motor 15 and a forward / backward moving cylinder 17 for moving the device stand 16 forward / backward with respect to the path line. The mandrel 11 is rotationally driven by the motor 15 by closing the clutch and opening the brake at the beginning of rewinding. Thus, the strip steel S is fed out, and when the feed-out by the feed-out pinch roll 6 is steady, the clutch device 14 is opened and the friction brake device 13 applies a predetermined brake to prevent the strip steel S from being loosened in the entry process. Is being done.

In such an uncoiler device 1, a tooth type disc 18 having teeth formed on the outer circumference is attached to the side that rotates at the time of steady feeding, for example, the coil side of the clutch device 14, and rotation / stop of this tooth type disc 18 is performed. It is detected by the first end detection sensor 7. The sensor 7 is composed of a transmission type or reflection type photoelectric switch arranged facing the tooth so that ON / OFF can be obtained by the tooth (see FIGS. 4 and 5).

As shown in FIG. 6, the signal from the sensor 7 is a continuous ON / OFF signal while the mandrel 11 is rotating, but when the mandrel 11 is stopped, it becomes a constant signal, which is the set time t _0. When it is continued, it is determined that the mandrel 11 is stopped. When the strip steel S is removed from the mandrel 11, the rotation of the mandrel 11 is stopped by the braking force of the friction brake device 13, so that the termination of the mandrel 11 can detect that the end of the strip steel S has come out of the uncoiler device 1.

Further, the second end detection sensor 8 is installed on the exit side of the leveler device 2 to detect the end of the strip steel S exiting the uncoiler device 1. This sensor 8 can also be composed of a photoelectric switch.

First end detection sensor 7 and second end detection sensor 8
The detection signal of is input to the control device 10. Control device 10
Is capable of switching the feeding speed of the feeding pinch roll 6 and is capable of setting set times t ₁ , t ₂ and t ₃ by a timer, and receives a command to each device in response to a sensor detection signal and a work end signal from each device. It is supposed to output.

The following control is performed in the above configuration.

<Termination of preceding strip steel> (i) The preceding strip steel S ₁ is fed by the feed pinch roll 6 while being braked by the friction brake device 13, and the uncoiler device 1 is driven by the tensile force of the preceding strip steel S _1. It's spinning.

(ii) When the steady state ends and the preceding strip steel S ₁ disappears from the uncoiler device 1, the mandrel 11 is stopped by the braking force of the friction brake device 13, and at the same time, the tooth type disc 18 stopped is detected by the first end detection sensor. 7 detects and outputs a stop signal to the control apparatus 10. As a result, it is detected that the end of the preceding strip steel S ₁ has come off the uncoiler device 1.

(iii) The controller 10 receives the stop signal, that is, the first end detection signal, and switches the feed speed V of the feed pinch roll 6 to the set constant speed V ₀ . The feed speed V varies in synchronization with the next process speed (rotation control is performed by the looper equipment so that the loop length is kept constant), but the end of the preceding strip steel S ₁ is an uncoiler device. When exiting 1, the speed is switched to a constant speed as follows.

(iv) The preceding strip steel S ₁ is continuously delivered at a constant speed V ₀ , and the rear end of such strip steel is detected by the second end detection sensor 8. After receiving the second end detection signal, the control device 10 stops the delivery pinch roll 6 after the timer setting time t ₁ and cuts and removes the stopped end portion of the preceding strip steel S ₁ by the shear cutting machine 3.

Here, t ₁ may be t ₁ = (l ₁ −l ′) / V ₀ l ₁ : distance from the position detected by the sensor 8 to the cutting position of the cutting machine 1 ′: cut removal length.

(v) When the cutting is completed, the control device 10 receives the cutting completion signal and restarts the delivery pinch roll 6 at a constant speed V ₀ , and stops the delivery pinch roll 6 after another timer setting time t ₂ . t ₂ is t ₂ = l ₂ / V
_0: set in _(l 2 Distance from the cutting position of the cutting machine 3 to the lateral joint position of the transverse splicing device 4). The end of the preceding strip steel S ₁ stops at the joining position and waits for the next transverse joint work.

<Preparation of trailing coil> The trailing coil is rewound by a known technique, either automatically or automatically. A trailing coil is attached to the uncoiler device 1, and the motor is driven to rotate so that the lead is output. The shear cutting machine 3 cuts and removes the starting end portion of the trailing strip steel, and then sends it to the horizontal splicing machine 4.
In the horizontal joint machine 4, the end of the leading strip and the beginning of the trailing strip are connected by flash butt welding or the like.

<Sending of continuous strip steel> (i) When the horizontal joint is completed, the control device 10 receives the horizontal joint completion signal and starts the sending pinch roll 6 at a constant speed V ₀ , and after another timer setting time t ₃ , the sending pinch. The roll 6 is stopped. t ₃ is t ₃ = l ₃ / V
₀ (l ₃ : from the joining position of the horizontal splicing machine 4 to the bead removing device 5)
The distance to the removal position) is set.

(ii) After the beads are automatically removed by the bead removing device 5,
Upon receiving the bead removal completion signal, the feed-out pinch roll 6 is activated, and a steady operation at the feed-out speed V is performed.

The above is an example in which the tooth-shaped disc 18 and the photoelectric sensor 7 are used to detect the end of the preceding strip steel by the uncoiler device, but the present invention is not limited to this, and the following detection method may be used.

a) Method for detecting expansion of mandrel As shown in FIG.
9 is configured to be expanded / contracted by a cylinder 22 via, for example, a link 20 and a rod 21, and holds the coil C under pressure from the inside at all times. However, when the coil disappears, there is no constraint and the mandrel 11 is Since the diameter is expanded to the expansion limit, this is detected by the sensor. This sensor may be a switch such as a limit switch 7'operated by an actuator 23 attached to the rod 21, and detects the forward movement of the rod 21 when the strip steel comes off.

b) Direct detection method A photoelectric switch 7 ″ is installed on the outlet side of the uncoiler device 1 to directly detect the end of the preceding strip steel S ₁ .

Next, FIG. 2 shows a second embodiment of the present invention. In the first embodiment, the speed of the delivery pinch roll is switched to a constant speed and the distance is set by a timer, whereas the moving distance of the strip steel is directly set. Detect and perform distance setting. The only sensor is the end detection sensor 8 composed of a photoelectric switch on the output side of the leveler device 2, and the length measuring device 9 is installed on the output side of the feed pinch roll 6. The length measuring device 9 is a known device including a roller and a rotation detector.

The following control is performed in the above configuration.

(i) The end detection sensor 8 detects the end of the preceding strip steel S ₁ sent out from the uncoiler device 1 and sent by the pinch roll 6.

(ii) Start the measurement of the moving distance of the end of the preceding strip steel S ₁ by resetting the counter or the like by the end detection signal, and when the measured value reaches the preset distance l ₁ , stop the delivery pinch roll 6 Then, the shearing device 3 cuts and removes the terminal end portion of the stopped preceding strip steel S ₁ . The set distance l
It goes without saying that ₁ is exactly 1 ₁ (distance from the detection position to the cutting position) -l '(cutting removal length).

(iii) When the cutting is completed, the sending-out pinch roll 6 is restarted by the cutting completion signal, and the measurement is started.
As in (ii), when the distance l ₂ is reached, the delivery pinch roll 6 is stopped.

(iv) Similar to the first embodiment, the following coil is rewound and transversely connected.

(v) When the lateral joint is completed, the sending pinch roll 6 is restarted by the lateral joint completion signal, the measurement is started, and the sending pinch roll 6 is stopped at the distance l ₃ .
Hereinafter, the same processing as in the first embodiment is performed.

Although the strip steel has been described above, it goes without saying that the present invention can be applied not only to steel but also to the coil rewinding of other materials, for example, non-metallic materials such as copper, aluminum or cloth and rubber.

<Effects of the Invention> As described above, the present invention detects that the end of the strip has passed through the uncoiler device, switches the feeding speed to a constant speed, and sets the moving distance at the end of the strip by a timer. To stop the strip, or measure the strip movement amount after the strip end detection or work completion, and stop the strip at a preset travel distance to perform termination processing such as end cutting and lateral joint feed. , And has the following effects.

(i) By switching the feeding speed to a constant speed and setting a timer, or by measuring and setting a moving distance without error, the end of the preceding strip steel can be accurately grasped and the termination processing of the preceding strip steel can be completely automated. .

As a result, conventionally, a total of two operators were required for terminating the leading coil and exposing the trailing coil. However, one operator can perform the joining work, and labor can be saved.

(ii) The joining work can be speeded up, and the looper equipment can be shortened or the production efficiency can be improved.

(iii) Only a relatively inexpensive sensor or the like needs to be provided, and accurate automatic control can be performed with relatively simple and inexpensive equipment.
Further, in the case of an existing line, it can be easily and inexpensively modified.

[Brief description of drawings]

1 is a schematic diagram of a line showing a first embodiment of the present invention, FIG. 2 is a schematic diagram of a line showing a second embodiment of the present invention, and FIG.
FIG. 4 is a schematic side view showing an uncoiler device according to the present invention.
Fig. 5 is a side view showing the sensor part, a front view,
FIG. 6 is a graph showing an output signal of the sensor, and FIGS. 7 and 8 are a sectional view and a line schematic view showing another example of the sensor, respectively. C ... Coil, S ... Strip plate (band steel) 1 ... Uncoiler device 2 ... Leveler device, 3 ... Shear cutting machine 4 ... Horizontal splicing machine, 5 ... Bead removal device 6 ... Send-out pinch roll 7, 8 ... Rear end detection sensor 9 ... Length measuring device, 10 ... Control device 11 ... Mandrel, 12 ... Reducer 13 ... Friction brake device 14 ... Clutch device, 15 ... Motor 16 ... Device stand, 17 ... Forward / backward traveling cylinder 18 ... Toothed disc.

Claims (4)

[Claims] 1. A strip plate unwound from an uncoiler device,
The first end detection signal is detected when the end of the strip is removed from the uncoiler device that is driven and rotated by the tensile force of the strip when it is sent to the next process by the sending pinch roll through the cutting machine and the horizontal splicing machine in order. The feed pinch roll speed is switched to a constant speed by
Then, the end of the strip is detected at the entrance side of the cutting machine, and the time required for the strip end to move between the devices is set in advance, and the second end detection signal or the work completion signal of each device is set. A method for rewinding a strip plate, which comprises stopping the feed-out pinch roll and carrying out a predetermined operation after the set time has elapsed after receiving. 2. The strip rewound from the uncoiler device,
In the rewinding equipment that feeds to the next process by the sending pinch roll through the cutting machine and the horizontal splicing machine in order, it was installed in the uncoiler device that can be driven and rotated by the tensile force of the strip plate, and the end of the strip plate came out of the uncoiler device. End detection sensor capable of detecting the end, a second end detection sensor installed at the entrance side of the cutting machine and capable of detecting the end of the strip, and a pinch sent out by the first end detection signal from the first end detection sensor. It has a timer for switching the roll speed to a constant speed and for setting the time required for the end of the strip to move between the respective devices.
A strip rewinding facility, which is provided with a control device for stopping the delivery pinch roll after a set time has elapsed after receiving the end detection signal or the work completion signal of each device. 3. The strip rewound from the uncoiler device,
The end of the strip is detected between the uncoiler device and the cutter when sending it to the next process by the sending pinch roll through the cutting machine and the horizontal splicing machine in order, and the moving distance of the strip near the sending pinch roll is detected. When the measured distance is reached and the moving distance after receiving the end detection signal or the work completion signal of each device reaches a set distance between the devices, the feeding pinch roll is stopped and a predetermined work is performed. How to rewind a board. 4. The strip rewound from the uncoiler device,
In the rewinding equipment that sends through the cutting machine and the horizontal splicing machine in order, and sends it to the next process by the sending pinch roll, the end detection sensor that is installed between the uncoiler device and the cutting machine and that can detect the end of the strip, and the sending pinch roll A length measuring device installed in the vicinity and capable of measuring the moving distance of the strip, and the sending pinch roll when the moving distance after receiving the end detection signal or the work completion signal of each device reaches the set distance between the devices Rewinding equipment for strips, which is provided with a control device for stopping.