KR100832986B1 - Methode for controlling width of side trimmer - Google Patents

Abstract

The present invention relates to an automatic width adjusting device of a side trimmer to reduce the time required and improve productivity by automatically adjusting the width of the side trimmer according to the steel sheet width adjusted while driving without notching. In the above, the ratio between the traveling speed of the steel plate and the width adjustment time is set, and the time required for width adjustment for each width adjustment amount is calculated on the basis of the width adjustment speed of the side trimmer, Calculate the time required to reach the width adjustment start point (position) for each width adjustment amount to complete the width adjustment, and adjust the speed and width adjustment speed of the steel sheet at the set ratio from the width adjustment start position to the set ratio, without side stop Width adjustment is performed, and the width-off section is minimized while preventing surface damage of the ring member.

Side trimmer, notch, ring member, traveling speed, steel plate, width adjustment time

Description

How to adjust the width of the side trimmer automatically {METHODE FOR CONTROLLING WIDTH OF SIDE TRIMMER}

1 is a block diagram of a side trimmer.

2 is a graph showing a change in line speed when the width of a conventional side trimmer is adjusted.

3 is a view for explaining a width adjustment method of a conventional side trimmer.

4 is a view showing a side trimmer width adjusting method according to the present invention.

5 is a flowchart showing a width adjusting method of the width adjusting device according to the present invention.

6 is a graph showing the speed change of the steel sheet during the width adjustment of the side trimmer according to the present invention.

7 is a view showing a speed deceleration time position when the width adjustment method according to the present invention is applied.

8 is a block diagram showing a width adjusting device to which the present invention is applied.

* Description of the symbols for the main parts of the drawings *

100: side trimmer

200: notching equipment

300: weld detection device (# 3WPD)                 

400: Chopper Chip Cutting Device

500: chip feeder

The present invention relates to a width adjusting device of the side trimmer, and more particularly, to automatically adjust the width of the side trimmer according to the changed steel sheet width during driving without stopping the steel sheet when the steel plate having different widths passes through the welded part. It is about a width adjustment method.

In general, cold rolling and hot rolling facilities are provided with side trimmers capable of processing the width of the steel sheet in order to satisfy various width orders of demand.

The side trimmer is basically a width adjusting device for varying the width of the steel sheet according to the indicated width, a width measuring device for measuring that the steel sheet is manufactured with the determined width, and a welding part sensing device for sensing the weld to set the width adjustment position. And a notch facility for cutting both ends of the weld so that the side trimmer block can be freely operated.

1 is a block diagram showing a general side trimmer, the motor (2) for adjusting the width of the side trimmer 100 is a combination of the operation block 10 and the drive block 20 and a pair of the upper surface of the sliding bed (4) The block nut members 13 and 23 are integrally fixed to the lower part of the block members 10 and 20, respectively, and are connected with a screw 3 having a predetermined pitch. One side of (3) is configured to be connected to the motor (2).

On one side of the operation block 10, the upper ring road 11 and the plurality of rubber rings 11a are combined, and the lower ring ring 15 and the rubber ring 15a are combined. Similarly, on one side of the driving block 20, the upper and lower ring diagrams 21 and 25 and the plurality of rubber rings 21a and 25a are mounted at the same height.

At this time, the lower ring 15 of the operation block 10 and the lower ring 25 of the drive block 20 is fixed, the distance (D) between the lower ring member 15, 25 is always constant while The spacing between the ring members 11 and 21, the operation block 10 and the drive block 20 depends on the gap adjustment given to the thickness and steel type of the steel plate 1, and the polishing thickness of the ring member.

In addition, the operation block 10 and the drive block 20 is a plurality of hydraulic clamps 17, which is fixed to the lower portion of the operation block 10 and the drive block 20 in order to maintain a constant width while the steel plate 1 is running 27), a plurality of hydraulic clamps 17 and 27 are freed during the width adjustment so that the operation block 10 and the drive block 20 are assembled toward the center or at both ends according to the rotation of the motor 2. It happens or it happens.

In addition, the side trimmer 100 is provided with a pulse generator 5 on one side of the screw (3) when adjusting the width, detects the amount of rotation of the screw (3), and moves the detected amount of rotation of the screw It is converted to length and transferred to the cab for use in width adjustment control.                         

Then, the width adjustment amount of the side trimmer 100 is to recognize the width of the preceding steel plate and the trailing steel plate in the host computer, and to indicate the width adjustment amount by line tracking.

In general, the cold rolled roll has a constant amount of roll replacement due to increased fatigue of the roll surface when it is used for a long time, so that the roll is replaced by a certain amount. Then, the width of the steel sheet to be worked for each unit is knitted so as to decrease in order from the largest.

Therefore, the width of the trailing steel plate is generally smaller than that of the preceding steel plate, and the difference does not exceed 60 mm except for a special case.

3 is a view showing a conventional method of adjusting the width of the side trimmer 100 in the width change portion of the steel sheet, the welding hole (1a) about 20cm in front of the preceding coil side to the welding portion of the preceding steel sheet (1) When the welding hole passes through the weld detector (#WPD) installed in front of the notch, the sensing speed is reduced to 30mpm, and then further a predetermined distance from the notch installed in front of the side trimmer 100 Stop it.

Then, the notch is a leading and trailing steel plate (11, 15, 21, 25) mounted on the side trimmer 10 and the drive block 20 to be introduced into the steel sheet without interference to the steel sheet (1) The welded part 1) is cut back and forth in a half moon shape.

Therefore, as shown in FIG. 3 (a), the welded portion cut in half moon shape around the welded portion moves to the side trimmer 100 at a low speed in a stopped state. When the notching part of the steel sheet arrives, the side trimmer 100 adjusts the desired target value while gradually decreasing the width along the half moon shape.

After the width adjustment is completed, check that the width of the steel sheet is adjusted according to the indicated width.

At this time, if the target value is less than or exceeded, it is necessary to adjust the width of the width, the upper and lower ring members 11, 15, 21, 25 is in a state of biting the steel plate, the screw (3) by rotating the width of the steel sheet (1) Even if it is adjusted, accurate width adjustment is not easy due to the interference of the steel sheet 1, and since it is repeatedly executed several times until the target value is reached, it takes a lot of width adjustment time and as a result, there is a problem of lowering productivity.

Meanwhile, when the width is adjusted, the width is narrowed to the center in the state where the steel plate is bitten by the ring members 11, 15, 21, and 25, and then widened again. Therefore, when the width is narrowed, a part of the surface of the ring member is damaged, There is a problem of generating saw ear in the product.

In addition, as shown in (b) of FIG. 3, between the blocks 10 and 20 of the side trimmer and the chopper facilities 430 and 440, the needles C1 and C2 cut from the steel sheet 1 are smoothly used as a chopper facility. Chute 18, 28, which is a chip guide for guiding, is installed, which is a width between the block members 10, 20 and the ring members 11, 21. ) And the straightness members 410 and 420 of the chopper facility. Therefore, the chip generated during normal steel plate running is smoothly guided through the chutes 18 and 28 by about 10 to 20 mm, but the width of the chip is about 50 mm when the welding part passes through when adjusting the width according to the conventional method. There is a problem that the chip is caught in the chute 18 and 28 because it becomes larger than the chute width.

As shown in (c) of FIG. 3, a predetermined amount of backlash exists between the screw 3 and the block nut 13, but the width of the backlash changes when the width is narrowed and widened as described above. There is a problem that an error occurs when adjusting the width.

The present invention has been proposed in order to solve the above-described problems, and its object is to weld differently to the line and trailing steel plate by specifying the deceleration start position of the steel sheet in accordance with the width adjustment degree when the width is adjusted according to the passage of the different welding portions. The width adjustment is completed at a certain position before reaching the side trimmer, and the trailing steel sheet is received, thereby completing the width adjustment without stopping the line, thereby reducing the time required and preventing the chip from being caught in the chute. The automatic width adjustment method.

As a constitutional means for achieving the above object of the present invention, the present invention is a method for automatically adjusting the width of the side trimmer,

A) The first reference position for determining the width adjustment time, located at the front end of the side trimmer, the first and second set speeds corresponding to the traveling speed of the steel sheet in the width adjustment step, and the width adjustment speed of the side trimmer are set. Making;

B) Calculate the time required for width adjustment by width adjustment amount based on the width adjustment speed of the side trimmer, and start the width adjustment by width adjustment amount to complete the width adjustment at a certain distance from the steel plate welding part to the trailing steel plate. Calculating and tabulating the time required to reach;

C) detecting the welded part of the steel sheet to pass through the first reference position;

D) decelerating the steel plate running speed to the first predetermined speed when the welded part of the steel plate passes the first reference position;

E) checking the width adjustment amount of the side trimmer corresponding to the width change of the steel sheet and determining a delay time from the corresponding first reference position in the table;

F) After the welding part of the steel sheet passes the first reference position and delays for a time corresponding to the width adjustment amount, the speed of the steel sheet is reduced to the second set speed and the side trimmer is operated at the set width adjustment speed of the side trimmer. Performing an adjustment; And

G) amplifying the steel plate speed to the line work speed after the width adjustment is completed.

EMBODIMENT OF THE INVENTION Hereinafter, the automatic width adjustment method of the side trimmer by this invention is demonstrated with reference to attached drawing.

4 (a) is a schematic diagram showing a width adjustment state of the steel sheet according to the present invention, (b) is a state diagram of the screw 3 and the nut member 13 during the width adjustment according to the present invention.

5 is a flowchart illustrating a process for adjusting the width in the welded portion of the steel sheet as shown in FIG. 4A, wherein the second welded portion detecting device installed at the front end of the notch in the state in which the ASD mode is turned on (# 2WPD) is turned on and the weld is first detected (S51), the line speed is first decelerated to the set speed (30mpm) (S52).

In the above, the automatic welding and the semi-automatic time are divided. In the case of full automatic operation, when the third welding part detecting device (# 2WPD) is turned on, the line speed is changed to the width adjusting speed (15mpm) after a delay for the time set by the width adjusting amount. Slows down the car.

At the same time, the width trimming operation of the side trimmer 100 is started to adjust the width, the gap, and the overlapping interval of the side trimmer. At this time, the side trimmer 100 moves by the length corresponding to the width adjustment amount toward the center operation block 10 and the drive block 20 at a constant speed (S56).

When the width adjustment is completed by the above, wait for a predetermined time, and then the speed of the steel sheet running at the normal line speed by the amplification instruction (S65) (S66). Normal line work then takes place.

On the contrary, when the semi-automatic setting is made above, the notch operates according to the notching selection of the operator (S59 to S61). Moving to the trimmer, the width adjustment of the side trimmer 100, the knife interval adjustment, and the overlap interval adjustment operation are performed according to the manual selection of the operator and the set data (S64). Then, after the speed is increased at the normal speed according to the speed increase instruction (S65, S66).

Figure 6 is a graph showing the relationship between the width adjustment time and the steel plate running speed according to the present invention, when the steel sheet is running at the line work speed, when the ASD is turned on, slowly decelerate to 30MPM, and then again the third welded portion When the sensing device (# 3WPD) is on, it decelerates to 15mpm again. Then, the width adjustment operation is carried out while maintaining the speed of 15mpm, wherein the width adjustment time depends on the width adjustment amount, up to about 20 seconds. After that, when the width adjustment is completed, the traveling speed of the steel sheet is increased to the line working speed to proceed with the normal rolling operation. Compared with the time-varying speed change graph in the conventional width adjustment operation shown in FIG. 2, the line stop section for the notch operation is eliminated, and the width adjustment is performed while maintaining the constant speed 15mpm without the line stop during the width adjustment. As a result, the time required for width adjustment is greatly reduced as compared with the conventional art.

7 is a view showing an embodiment for the width adjustment start position for each width adjustment amount according to the present invention, Figure 8 is a process diagram of a cold rolling facility to which the present invention is applied.

The present invention will be described with reference to the above drawings.

In the process diagram of FIG. 8, when the welding hole formed in the preceding steel sheet of the steel sheet 1 passes through the second welding part detecting apparatus # 2WPD, the first relay 44 is operated to turn on the contact a, and as a result, the line Instead of the first speed setpoint 40 corresponding to the speed, a second speed setpoint 41 (eg, 30 mpm) is applied to the speed controller 45, and the speed controller 45 controls the motor 46. To reduce the traveling speed of the steel sheet to the second predetermined speed.

Then, when the steel plate travels at the decelerated second set speed and the welding part reaches the third welding part detecting device # 3WPD, the second relay 43 and the fourth relay 49 operate to contact the A contact point. Turn on Thus, the third speed setpoint 42, which is lower than, for example, 15 mpm, is applied to the speed controller 45 instead of the second speed setpoint 41, so that the traveling speed of the steel sheet becomes the third setpoint speed. To decelerate second.

Then, the fourth relay 49 is operated to apply the material information values 52 and 53 provided from the host computer to the width controller 50 so that the width adjustment of the side trimmer 100 is performed. When the width adjusting motor 51 is controlled, the actual speed value fed back from the pulse generator PLG is compared with the preceding coil information 52 and the following coil information 53 provided from the host computer to reach a target width. Feedback is controlled.

In more detail, the width adjustment operation is performed. The coil information 52 or 53 applied from the host computer is the width of the preceding coil and the width of the following coil, and the width deviation of the preceding coil and the following coil is compared with the line speed. By setting the width adjustment start time differently according to the width deviation, the setting example is shown in Table 1 below.

Leading width-trailing width Time delay 46 to 54 mm 4 sec 37 to 45 mm 7 sec 28 to 36 mm 10 sec 19 to 27 mm 13 seconds 1 to 18 mm 15 seconds

In Table 1, the time delay indicates a time interval in which the width adjustment is delayed from the side trimmer 100 to the start of the welding at the time of detecting the welding part of the third welding part detecting device (# 3WPD). When the operating speed of the screw 3 of the side trimmer 10 is the same, the larger the width adjustment amount, the width adjustment is required, but the width adjustment should be made sooner than when the width adjustment amount is small. Table 1 above shows the time relationship between the width adjustment amount and the width adjustment start time.

That is, since the distance from the third welding part detecting device # 3WPD to the center of the side trimmer 100 is a constant value (for example, 6.5 m), the line speed is fixed and the width adjusting speed is fixed. However, the time required for width adjustment will vary depending on the width adjustment amount. Therefore, the width adjustment complete position is set to the same position, and accordingly, the width start position is set differently for each width adjustment amount, thereby minimizing the occurrence of unnecessary width off sections.

For example, as shown in Table 1 above, if the width adjustment amount is 18 mm, after 4.5 m (15 seconds later) in the third welding part detecting apparatus (# 3WPD), the third adjustment value is 19 to 27 mm. After proceeding 3.75m (# 3WPD) in the weld zone detection device (after 13 seconds), after 3m for 28 ~ 36mm (after 10 seconds), after 2.25m for 37 ~ 45mm (after 7 seconds), 46 In the case of ˜54mm, after the 1.75m progress (after 4 seconds), the speed is reduced to 15mpm, which is the width adjustment speed, and the width is adjusted by moving the operation block 10 and the drive block 20 to the center by the width adjustment value.

7 is a diagram illustrating a line speed reduction and a width adjustment start position for each of the above-described width adjustment amounts.

In the above, the width adjustment proceeds while the operation block 10 and the drive block 20 move to the center while the steel sheet proceeds to 15mpm, and the width adjustment is performed 20 cm in front of the welded portion of the preceding and following steel sheets irrespective of the width adjustment amount. It is set to complete.

Since the traveling speed of the steel plate during the width adjustment is 250 mm / s (15mpm), the width adjustment speed at which the operation block 10 and the driving block 20 move to the center is 2 mm / s, so the speed ratio is 250: 3. do.

Unlike the above, when the ratio of the traveling speed and the width adjustment speed of the steel sheet is larger than 250: 3, that is, when the traveling speed of the steel sheet is faster than the width adjustment speed, the width adjusting section becomes longer and thus the width-off section becomes longer. The error rate will drop. In addition, when the ratio between the traveling speed and the width adjustment speed of the steel sheet is less than 250: 3, a regular overlapping interval is usually formed between the upper ring members 11 and 15, and the width is adjusted while the steel sheet is sandwiched therebetween. There is a problem that the accuracy is lowered and the surface breakage of the upper and lower ring members occur.                     

Therefore, in the present invention, by setting the ratio between the traveling speed and the width adjustment speed of the steel sheet during the width adjustment as described above to 250: 3, to prevent surface damage and the inaccuracy of the width of the ring member and to minimize the width off section.

On the other hand, there are widths and tolerances required by the demand price during normal driving, although the width of the steel sheet being manufactured is included in the tolerances, but some deviations may occur. In this case, it is necessary to adjust the width even if the welds of the leading and trailing steel sheets do not reach. If the disc defects such as bending of the preceding coil (camber) and lack of width occur even at the time when the welding portion reaches the actual welding portion, You need to adjust the width.

In this case, the present invention enables manual adjustment of the width adjustment of the weld, so that the width adjustment can be performed at the discretion of the driver regardless of the position of the weld. In FIG. 8, when the operator arbitrarily sets the width adjustment amount through the width adjustment amount setting unit 47, and selects manual, the setting value of the width adjustment amount setting unit 47 is transferred to the width control unit 50. Width control is achieved.

That is, when the driver determines that the width adjustment is necessary and instructs the width adjustment and sets the width adjustment amount, the traveling speed of the steel sheet is decelerated to 15mpm at the point of time, and the width adjustment of the side trimmer 100 starts.

As described above, the present invention sets the ratio between the running speed and the width adjusting speed of the steel sheet appropriately, and sets the width adjusting starting point for each width adjusting amount, so that the width adjusting operation can be executed immediately while the steel sheet is running without line stop. By minimizing the width-off section and preventing surface damage of upper and lower circular members, it is possible to expect quality improvement, shortening the width adjustment time, and completing the width adjustment just before the trailing steel sheet reaches the side trimmer. It has an excellent effect.

Claims (4)

In the automatic width adjustment method of the side trimmer, A) the first reference position for determining the width adjustment start point, the first and second set speeds corresponding to the traveling speed of the steel sheet in the width adjustment step, and the width adjustment speed of the side trimmer Making; B) Calculate the time required for width adjustment by width adjustment amount based on the width adjustment speed of the side trimmer, and start the width adjustment by width adjustment amount to complete the width adjustment at a certain distance from the steel plate welding part to the trailing steel plate. Calculating and tabulating the time required to reach; C) passing the welded portion of the steel sheet through the first reference position; D) decelerating the steel plate running speed to the first predetermined speed when the welded part of the steel plate passes the first reference position; E) checking the width adjustment amount of the side trimmer corresponding to the width change of the steel sheet and determining a delay time from the corresponding first reference position in the table; F) After the welding part of the steel sheet passes the first reference position and delays for a time corresponding to the width adjustment amount, the speed of the steel sheet is reduced to the second set speed and the side trimmer is operated at the set width adjustment speed of the side trimmer. Performing an adjustment; And G) Automatic width adjustment method of the side trimmer, characterized in that the step of amplifying the steel sheet speed to the line work speed after the width adjustment is completed. The method of claim 1, wherein the ratio of the second set speed corresponding to the traveling speed of the steel sheet during the width adjustment and the width adjustment speed of the side trimmer is 250: 3. The method of claim 1, wherein the first set speed of the steel sheet is set to be slower than the line work speed and faster than the second set speed. The method of claim 1 wherein the method is A) selecting whether to automatically or manually adjust the width; I) executing step a) in step a) during automatic selection; The driver setting the width adjustment amount during the manual selection; And K) when the driver width adjustment instruction further comprises the step of operating the sight trimmer to reduce the traveling speed of the steel sheet to the second set speed and then adjust the width by the set width adjustment amount; .

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