JPH04111923A - Method and equipment for unwinding steel strip - Google Patents

Abstract

PURPOSE:To exactly detect the final end of steel strip and to automatically treat the final end by detecting that the final end of steel strip passed the un- coiler device, changing the feeding speed at the fixed speed and executing the prescribed work with stopping the steel strip after the lapse of set time since detecting the final end of steel strip or finishing the work. CONSTITUTION:By detecting that the final end of steel strip S1 is passed from the un-coiler device 1 rotating following with the tensile force of the steel strip S1, the speed of the feeding pinch roll 6 is switched to the constant speed with this 1st final end detecting signal. Next, the final end of the steel strip S1 is detected at the inlet side of the change-over machine 3, the times required for the movement of the final end of steel strip among each devices t1, t2, t3 are preliminarily set, and after the lapse of set time t1, t2, t3 since receiving the 2nd final end detecting signal or the work finishing signal of each devices 3, 4, 5, by stopping the feeding pinch roll 6, the prescribed work is executed.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is applicable to the manufacturing of electric resistance welded steel pipes, welded sections, processing equipment for steel plates, etc., in which the strip of the leading coil and the trailing coil are separated. The present invention relates to a method and equipment for unwinding a strip that can automatically process the rear end of a preceding coil when joining strips.

<Prior art> In manufacturing equipment for electric resistance welded steel pipes, continuous annealing equipment for steel plates, etc., processing each coil individually is inefficient and requires a great deal of time and manpower to pass through the tip of the coil. In the entry process, the end of the steel strip of the preceding coil and the beginning of the steel strip of the succeeding coil are joined by welding or the like to make the steel strip continuous and processed.

When joining steel strips, stop the steel strip of the preceding coil so that the end of the steel strip is located at the cutting position, cut the uneven part at the end of the steel strip with a cutting machine, and then move the end of this steel strip to the joining position. At the same time, the trailing coil is unwound, and after cutting the uneven part at the beginning of the strip, it is sent to the joining position, and the trailing coil's end of the strip and the beginning of the trailing coil are horizontally connected. Joined using a splicing machine.

On the other hand, in the continuous processing equipment on the exit side, the steel strip is fed out by the looper equipment for strip steel installed between the equipment on the input side, and the steel strip is fed out at a predetermined speed regardless of the stoppage of threading or speed changes in the input process. Continuous processing is performed.

In such an entry process, it is necessary to quickly join the leading steel strip and the trailing steel strip in view of the capacity of the looper equipment. Since it is difficult to automatically operate the starting end of the trailing steel strip, cut it, and set the plate joints, it is difficult to speed up the process, so it is desired to speed up the processing of the end of the leading steel strip, which is a relatively simple operation.

Regarding the unwinding method at the end of the coil, the following methods have been proposed in the past.

■Unexamined Japanese Patent Publication No. 1-166818 This method detects the side shape of the center of the coil in a payoff reel using an image sensor.
The signal is analyzed to create an uneven image of the side surface of the coil (the dark bone between the steel strips becomes concave), and based on this image, the number of remaining turns of the coil is measured, and this number of remaining turns of the coil is used as the starting point for deceleration set in advance. This method automatically decelerates by outputting a deceleration command to the input side control device when the number of coil turns matches.

■Japanese Patent Application Laid-Open No. 50-104155 This is a plate length measurement method that measures the length of the strip steel behind the seam welding machine of each line in equipment that has two or more coil unwinding lines such as H-shaped steel. A device is installed, and this plate length measuring device measures the length of the steel strip from the start of operation.The line operation is stopped at the required length position, and the length of the steel strip is determined by cutting it with a cutting machine. This is a method to align them.

Problems that this invention attempts to solve> However, method (2) has the following problems.

(a) Image sensor-1 requires image processing, increasing equipment cost.

(b) Since the detection is based on a concavo-convex image, it is difficult to analyze when the coil winding shape is good, and especially in the case of a thin plate, a difference in the number of windings leads to a difference in length, and the reliability of accuracy 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 slightly low, but it cannot be used for control that accurately determines the end of the coil and quickly processes the end of the coil. .

Furthermore, the method (2) also has the following problems.

(a) There is an error in the plate length measuring device, and there is a lack of accuracy in determining the end of the coil. Particularly in long coils, errors are accumulated; for example, even with a 1% error, a 1000 m long coil will result in an error of 10 m.

(b) Therefore, when trying to terminate the coil,
Visually check the end of the coil, then one person cuts the end of the coil → feeds it to the cross-jointing machine → prepares for the cross-joint, and another person leads the next coil → leveling → cuts the starting end → sends it to the cross-joining machine Then, cross-jointing etc. will be performed, and two operators will be required. Furthermore, if the above-mentioned work is performed by a second person, it will take time, and the louvers will have to be made longer, increasing equipment costs.

This invention was made to solve the above-mentioned problems, and its purpose is to accurately grasp the starting end of the strip of the preceding coil and to process the end of the strip using a relatively simple and inexpensive device configuration. An object of the present invention is to provide a method for automatically rewinding a winding plate and its equipment.

<Means for Solving the Problems> A first unwinding method of the present invention, as shown in FIG.
, the strip S1 is sequentially passed through the cross splicing machine 4, and sent to the next process by the feed pinch roll 6. It is detected that the end of the strip S1 has come off from the uncoiler device 1, which rotates as a result of the tension of the strip S1. 1. The speed of the feed-out pinch roll 6 is set to a constant speed ■ by the end detection signal. Then, the end of the strip S is detected on the input side of the cutting machine 3, and
Time required for the end of the strip to move between each device tI, t
2, t3 is set in advance, and after receiving the second end detection signal or the work completion signal of each device, the set time 1. ．． 12.1. After the elapse of time, the feed pinch roll 6 is stopped and a predetermined operation such as end cutting is performed.

As shown in FIG. 1, the first unwinding equipment of the present invention cuts the strip S1 unwound from the uncoiler device 1 into a cutting machine 3.
, a transverse splicing machine 4 in order, and a feed-out pinch roll 6 to send to the next process, which is installed in an uncoiler device 1 that can be driven to rotate by the tensile force of the strip SI, and from the uncoiler device 1 to the terminal end of the strip SI. a first end detection sensor 7 that can detect that the strip has come off; a second end detection sensor 8 that is installed on the inlet side of the cutting machine 3 and that can detect the end of the strip SI; The speed of the feeding pinch roll is set to a constant speed V by the first end detection signal. 1. The time required for the end of the strip to move between each device. ．． 12.13, and the set time t+, t2 after receiving the second termination detection signal from the second termination detection sensor 8 or the work completion signal of each device.
, j3, a control device 10 is provided to stop the feed-out pinch roll 6.

The first end detection sensor 7 may be a sensor that detects the stoppage of the mandrel 11 due to the end of the coil C coming off the mandrel 11, as shown in FIGS. 3 to 6, or a sensor as shown in FIG. It may be possible to detect the expansion of the mandrel 11 or to directly detect the end of the coil C as shown in FIG.

In the second unwinding method of the present invention, as shown in FIG.
, the cross-jointing machine 4 in order, and the uncoiler device 1 and the cutting machine 3 are sent to the next process by the feed pinch rolls 6.
The end of the strip S1 is detected between the two, and the moving distance of the strip SI is measured in the vicinity of the feed-out pinch roll 6, and the moving distance after receiving the end detection signal or the work completion signal of each device is determined. Set distance β1 between each device! 2.13
When this point is reached, the feed pinch roll 6 is stopped and a predetermined operation such as end cutting is performed.

As shown in FIG. 2, the second unwinding equipment of the present invention cuts the strip S1 unwound from the uncoiler device 1 into a cutting machine
, a cross-splicing machine 4 in order, and sent to the next process by a feed-out pinch roll 6, in which an end detection sensor 8 is installed between the uncoiler device 1 and the cutter ta3 and is capable of detecting the end of the strip S; A length measuring device 9 is installed near the pinch roll 6 and can measure the moving distance of the strip S, and the moving distance after receiving the end detection signal or the work completion signal of each device is the set distance between each device. z, , p2
, p, is provided with a control device 10 that stops the feed-out pinch roll 6.

Function> In the first invention, when the end of the strip S comes out of the uncoiler device 1, the first end detection sensor 7 detects this, and this first end detection signal causes the speed of the next step to be adjusted. The speed ■ of the synchronized delivery pinch roll 6 is a constant speed ■. can be switched to The delivery pinch roll 6 maintains this constant speed (■) until the bead is removed after cross-splicing. It is driven by.

The end of the strip S, which is being continuously fed out by the feed pinch roll 6, is detected at the entrance side of the cutting machine 3 by the second end detection sensor 8, and after a set time L1 has elapsed since this second end detection signal is obtained, The delivery pinch roll 6 is stopped and the end of the strip is cut. The feeding speed of the strip S is constant at ■o, and this constant speed V. The end of the strip is the second
Time required to move from end detection sensor 8 to cutting machine 3 1. By setting the timer, the end of the strip can be automatically positioned at the cutting position and the strip can be cut automatically.

Similarly, after the set times t2 and t3 have elapsed after receiving the cutting completion signal or cross-splicing completion signal, the feed pinch roll 6 stops, and the sheet is automatically fed to the cross-splicing machine 4 or removing device 5.

In addition, in the present invention, the operator performs the locating, cutting, and cross-splicing setting of the terminal end of the trailing coil C2, which is difficult to operate. All feeding is done automatically, and bead removal after cross-splicing and looper feeding are also done automatically.

Next, in the second invention, the end of the strip S1 that has passed through the uncoiler device 1 is detected by the end detection sensor 8, the moving distance of the strip S1 is measured by the length measuring device 9, and the end detection signal is received. The distance traveled after this is the set distance between the end detection sensor 8 and the cutting machine 3! , the feed pinch roll 6
stops and the end of the strip is cut.

Similarly, when the moving distance after receiving the cutting completion signal or cross-splicing completion signal reaches the set distance flz, f13, the feed pinch roll 6 stops and the feed to the cross-splicing machine 4 or bead removal device 5 is automatically stopped. It is done with purpose.

Since the moving distance of the strip S1 is directly measured, there is no need for a timer as in the first invention, and since the distance to be measured is short and the error does not accumulate, the error of the length measuring device 9 can be ignored.

Practical example The present invention will be described below based on illustrated embodiments.

FIG. 1 shows a first embodiment of the present invention, and the inlet equipment includes, in order from the upstream side, an uncoiler device 1, a leveler device 2, a shear cutting machine 3, and a horizontal splicing machine 4 such as a flash loose welding machine.
, a bead removing device 5, and a feeding pinch roll 6 are arranged.

The uncoiler device 1 includes a coil C as shown in FIG.
The mandrel 11 is connected to the mandrel 11 via the reducer 12, the friction brake device 13, and the clutch device 14.
The mandrel 11 is rotated by the motor 15 with the clutch closed and the brake opened at the beginning of rewinding. By this, the steel strip S is fed out, and when the feeding by the feeding pinch roll 6 is steady, the clutch device 14 is opened and a predetermined brake is applied by the friction brake device 13.
This is designed to prevent the steel strip S from loosening in the entry process.

In such an uncoiler device 1, a toothed disk 18 having teeth formed on the outer periphery is attached to the side that rotates during steady feeding, for example, the coil side of the clutch device 14, and the toothed disk 18 is rotated and stopped. is detected by the first end detection sensor 7. The sensor 7 is composed of a transmissive or reflective photoelectric switch placed opposite the tooth so that ON-OFF signals can be obtained from 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 stops, it becomes a constant signal that does not change, and this signal continues for the set time t. When it continues for a long time, it is determined that the mandrel 11 has stopped. Steel strip S from mandrel 11
When the rotation of the mandrel 11 stops due to the braking force of the friction brake device 13, the mandrel 1
1, it can be detected that the end of the strip S has been removed from the uncoiler device 1.

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

First termination detection sensor 7 and second termination detection sensor 8
The detection signal is input to the control device 10. Control device 10
The feed-out speed of the feed-out pinch roll 6 can be changed, and the setting times j+, f, z, and L3 can be set using a timer, and commands are output to each device upon receiving sensor detection signals and work completion signals from each device. It is made to be.

In the above configuration, the following control is performed.

<Termination treatment of the preceding steel strip> (i) The preceding steel strip S is fed by the feeding 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 steel strip SI. It's rotating.

(ii) When the steady state ends and the preceding steel strip S1 is removed 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 toothed disc 18 that has stopped is detected by the first end detection sensor. 7 detects and outputs a stop signal to the control device 10. This results in
It is detected that the end of the preceding steel strip SI has come out of the uncoiler device 1.

In the OiD control device 10, upon receiving the stop signal, that is, the first end detection signal, the feed-out speed ■ of the feed-out pinch roll 6 is set to a constant speed ■.

Switch to This delivery speed (■) fluctuates in sync with the next process speed (the rotation is controlled by the looper equipment so that the loop length is kept constant), but the preceding strip steel S
When the end of I passes through the uncoiler device 1, the speed is switched to a constant speed, for example as follows.

ω) Leading steel strip SI is at constant speed■. The second end detection sensor 8 detects the rear end of such a steel strip. The control device 10 receives the second end detection signal and stops the delivery pinch roll 6 after the timer setting time tI, and cuts and removes the end portion of the stopped preceding steel strip S by using the shear cutter 3.

Here, 1. teeth, t+ −(ffi+ 42’)/”.

! I: Distance from the detection position by sensor 8 to the cutting position of cutting machine 3! ”: The cutting removal length may be used.

0 When the cutting is completed, the control device 10 receives the cutting completion signal and sends out the pinch roll 6 at a constant speed ■. Then, after another timer setting time t2, the feeding pinch roll 6 is stopped. t2 is tz =42z /vo
(ffz: distance from the cutting position of the cutting machine 3 to the cross-joining position of the cross-joining machine 4). Preceding steel strip S.

The end of the joint stops at the joining position and waits for the next cross-joining operation.

Preparing the trailing coil> The trailing coil is rewound manually or automatically using a known technique. A trailing coil is attached to the uncoiler unit N1, and the motor is driven to rotate to perform extraction. After the starting end of the trailing band steel is cut and removed by the shear cutting machine 3, it is sent to the cross-splicing machine 4.

In the cross-jointing machine 4, the terminal end of the preceding steel strip and the starting end of the following steel strip are connected by flash hat welding or the like.

<Feeding continuous steel strip> (i) When the cross-splicing is completed, the control device 1o receives the cross-splicing completion signal and sets the feeding pinch roll 6 at a constant speed V.
. and stops the feed-out pinch roll 6 after another timer setting time t3. t3 is t3-j2:+
/ Vo (j23: distance from the joining position of the cross-jointing machine 4 to the removal position of the bead removal device 5).

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

Although an example has been described above in which the end of the preceding steel strip is detected in the uncoiler device using the toothed disc 18 and the photoelectric sensor 7, the detection method is not limited to this, and the following detection method may be used.

a) Method for detecting expansion of mandrel As shown in FIG.
For example, the coil C is expanded and contracted by a cylinder 22 via a link 20 and a rod 21, and the coil C is always held under pressure from inside. However, when the coil is removed, the restraint is lost and the mandrel 11 is This is detected by a sensor in order to expand the diameter to the enlargement ratio. 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 steel strip is removed.

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 steel strip S.

Next, FIG. 2 shows a second embodiment of the present invention. In the first embodiment, the speed of the feeding pinch rolls is changed to a constant speed and the distance is set by a timer, whereas the moving distance of the strip is directly controlled. Detect and set distance. The only sensor is an end detection sensor 8 consisting of a photoelectric switch on the output side of the leveler device 2, and a length measuring device 9 is installed on the output side of the feed pinch roll 6. This length measuring device 9 is a known device consisting of a roller and a rotation detector.

In the above configuration, the following control is performed.

(i) An end detection sensor 8 detects the end of the preceding steel strip S that has come off the uncoiler device 1 and is sent by the pinch rolls 6.

(11) Start measuring the movement distance of the end of the preceding steel strip S1 by resetting the counter etc. with the end detection signal,
When this measured value reaches a preset distance, the delivery pinch roll 6 is stopped, and the stopped leading steel strip s +
The terminal end is cut off using a shear cutter 3. In addition, the setting distance! It goes without saying that 1 is precisely p, 1 (distance from the detection position to the cutting position) - p'' (cutting removal length).

When the GiD cutting is completed, the feed-out pinch roll 6 is restarted by the cutting completion signal, measurement is started, and as in (ii), when the distance 12 is reached, the feed-out pinch roll 6 is stopped.

Gv) The trailing coil is unwound and cross-spliced in the same manner as in the first embodiment.

(V) When the cross-joint is completed, the feed-out pinch roll 6 is restarted by the cross-joint completion signal, measurement is started, and the distance is measured! 3, the feed-out pinch roll 6 is stopped.

Hereinafter, processing is performed in the same manner as in the first embodiment.

Although the above description has been made regarding a steel band, it goes without saying that the present invention can be applied to coil unwinding of not only copper but also other materials, such as copper, aluminum, or non-metallic materials such as 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, sets the moving distance of the end of the strip with a timer, and starts the strip. Stop the plate, or detect the end of the strip or measure the amount of strip movement from the completion of the work, stop the strip at a preset moving distance, and perform end processing such as end cutting or horizontal splicing. Therefore, the following effects are achieved.

(1) By switching the feed speed to a constant speed and setting a timer, or by measuring and setting the moving distance without error, the end of the preceding strip can be accurately determined, and the termination process of the preceding strip can be completely automated. .

As a result, whereas conventionally a total of two operators were required to terminate the preceding coil and to take out the trailing coil, only one operator can perform the joining work, resulting in labor savings.

(ii) It is possible to speed up the joining work, shorten the length of looper equipment, or improve production efficiency.

It is only necessary to provide GiO, which is relatively inexpensive, such as a sensor, and accurate automatic control is possible with relatively simple and inexpensive equipment.

Furthermore, in the case of an existing line, it can be modified easily and at low cost.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of lines showing a first embodiment of the present invention, FIG. 2 is a schematic diagram of lines showing a second embodiment of the invention, and FIG.
The figure is a schematic side view showing the uncoiler device of the present invention.
Figure 5 is a side view and front view showing a part of the sensor,
FIG. 6 is a graph showing the output signal of the sensor, and FIGS. 7 and 8 are a cross-sectional view and a line schematic diagram showing other examples of the sensor, respectively. C...Coil, S...Strip plate (strip steel) 1...
Uncoiler device 2... Leveler device, 3... Shear cutting machine 4...
Cross joining machine, 5... Beat removal device 6... Delivery pinch roll 7.8... Trailing edge detection sensor 9... Length measuring device, 10... System? fll device 11
...Mandrel, 12...Reducer 13...Friction brake device 14...Clutch device, 15...Motor 16...
Equipment mount, 17...Cylinder for forward and backward movement 1 day...
Tooth disc. Figure A Figure ψ Figure

Claims (4)

[Claims] (1) When the strip rewound from the uncoiler device is passed through a cutting machine and a cross splicing machine in order, and sent to the next process by a feed-out pinch roll, the end of the strip is removed from the uncoiler device, which rotates under the tension of the strip. The first end detection signal is used to switch the speed of the feed pinch roll to a constant speed, and then the end of the strip is detected on the input side of the cutting machine, and the end of the strip is detected between each device. The time required to move the roller is set in advance, and after the set time elapses after receiving the second end detection signal or the work completion signal of each device, the feeding pinch roll is stopped and the predetermined work is performed. A distinctive method of unwinding the strip. (2) In the unwinding equipment, the strip unwound from the uncoiler device is passed through a cutting machine and a cross-splicing machine in order, and then sent to the next process using pinch rolls. a first end detection sensor that is provided and capable of detecting that the end of the strip has come off from the uncoiler device; a second end detection sensor that is installed on the entry side of the cutting machine and capable of detecting the end of the strip; The speed of the feed pinch roll is switched to a constant speed by the first end detection signal from the first end detection sensor, and the second end detection sensor has a timer that sets the time required for the end of the strip to move between each device. 1. A strip rewinding facility comprising a control device that stops the feed pinch roll after a set time has elapsed after receiving a second end detection signal from a sensor or a work completion signal from each device. (3) When the strip rewound from the uncoiler device is passed through a cutting machine and a cross-splicing machine in order, and sent to the next process by a feed-out pinch roll, the end of the strip is detected between the uncoiler device and the cutting machine. At the same time, the moving distance of the strip is measured near the feed-out pinch roll, and when the moving distance after receiving the end detection signal or the work completion signal of each device reaches the set distance between each device, the feed-out pinch roll is A method for unwinding a strip, characterized by stopping the strip and performing a predetermined operation. (4) In the unwinding equipment, the strip unwound from the uncoiler device is passed through a cutting machine and a cross splicing machine in order, and then sent to the next process using a feed-out pinch roll. An end detection sensor capable of detecting the end, a length measuring device installed near the feed pinch roll and capable of measuring the moving distance of the strip, and the distance traveled after receiving the end detection signal or the work completion signal of each device. 1. A strip rewinding facility characterized in that a control device is provided to stop the feeding pinch rolls when the rollers reach a set distance between the devices.