JPS63295015A - Device for controlling processing speed - Google Patents

Abstract

PURPOSE:To improve the quality of a strip by calculating the stoppage scheduled time of a processing material as well as detecting the amt. of the processing material inside a looper and operating the adjustable rate of the processing material based on the result thereof. CONSTITUTION:An inlet side stoppage scheduled time computing element 10 is provided inside a processing speed control device and an adjustable speed rate computing element 11 is arranged as well. The computing element 11 operates the optimum adjustable speed rate of an inlet side section based on the operation signal of an inlet side operation speed reducing signal generator 9, the time (t) of the computing element 10, central processing speed and the detection amt. of a looper position detector 6. The processing speed of a central processing section is then controlled based on the adjustable speed rate operated of the processing material. The variation in the strip speed given access to a looper is relaxed and the tension fluctuation in the strip is reduced. Consequently the quality of a strip is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] This invention relates to a stop of an entry section used in a continuous process line such as a continuous plating line.

The present invention relates to a process speed control device for operation.

[Conventional technology]

Continuous process lines, such as continuous plating lines, require a continuous supply of strips of processing material to a central processing section. For this purpose, while the tail end of the preceding strip is temporarily stopped at the input side of the process line and the tip of the following strip is connected by welding, etc., a looper is installed at an intermediate position between the input side of the process line and the central processing section. The strips are continuously delivered to a central processing section.

After the preceding strip and the following strip are connected, the inlet section is operated at a faster speed than the central processing section in preparation for supplying the strip for the next connection, thereby supplying the strip to the looper and discharging the strip. I try to replenish the strips in proportion to the quantity.

FIG. 3 shows a conventional process speed control device on the inlet side of a process line, in which 1 is a speed reference generation circuit that generates a speed reference for the inlet section, 2 is an inlet speed generation circuit,
The output of the input speed circuit 2 controls the speed of a motor that drives a roller (not shown) that conveys the input strip. 3 is a speed setting device, 4 is an acceleration/deceleration weight setting device, and the speed standard generation circuit 1 generates a speed standard that reaches the speed set in the speed setting device 3 at the acceleration/deceleration rate set in the acceleration/deceleration weight setting device 4. , or make it disappear.

5 is a processing speed detector for detecting the central processing speed in the central processing section, and 6 is a processing material amount detector, in which a looper position detector is used.

7 is a synchronous control circuit which generates a synchronous control signal 8 based on the input signals from the speed reference generation circuit 1, the processing speed detector 5 and the louver position detector 6, and alternately turns the contacts 8a and 8b open.
N, OFF control.

Next, the operation will be explained.

In the figure, the speed reference generation circuit 1 is the acceleration/deceleration weight setting device 4.
The speed signal is generated by accelerating or decelerating according to a constant rate of the entrance section acceleration/deceleration rate set in , determines the speed that will reach the speed set in the speed setter 3, and generates a speed signal. This speed signal is a speed signal for dispensing the strip from the looper to the central processing section for following the subsequent strip, and for replenishing the strip to the looper, and is given as an incoming speed reference via contact 8b.

On the other hand, during normal operation when a predetermined amount of strip is formed in the looper, the central processing speed detected by the processing speed detector 5 is supplied to the inlet speed generation circuit 2 via the contact 8a, and the strip is conveyed at the central processing speed. do.

The above two speed signals supplied to the inlet speed generating circuit 2 are connected to the contact 8 by a synchronous control signal generated by the synchronous control circuit 7.
By alternately ON-OFF controlling a and 8b, they are supplied alternatively.

That is, the louver position detector 6 is a detector attached to a strip accumulating mechanical device (looper) installed at an intermediate position between the entrance section and the central processing section, and detects the amount of strip. . Synchronous control circuit 7
In order to keep the looper at a constant position based on the position detection amount of the louver position detector 6, the inlet speed of the speed reference generation circuit, and the processing speed of the processing speed detector 5, the inlet speed reference is set to the center speed. Control so that it is the same as the standard.

FIG. 4 shows a pattern of input and process speeds operated by a conventional process speed controller.

In the figure, 41 is the central processing speed, which is operated at a constant speed to ensure production volume.

Reference numeral 42 represents the entry speed, and section a represents the entry stop time. During this stop time, the welding machine in the entry section welds the preceding coil and the succeeding coil. The area of the diagonal line S is the variation in the stripping amount caused by the speed difference between the entrance side and the processing section, and the stripping amount decreased in the section C makes the entrance speed 42 higher than the processing speed 41 in the section C. This replenishes the loopa. A looper is a mechanical device that dispenses and stores the amount of strip that varies between sections S and C.

[Problem that the invention seeks to solve]

Since the conventional process speed control device is configured as described above, the deceleration rate α1 and acceleration rate α2 for the inlet side deceleration at the time of strip discharging and the inlet side acceleration at the time of strip storage in the looper are determined by the looper's deceleration rate α1 and acceleration rate α2, respectively. It is unrelated to the loop amount, and the expected stop time on the entry side due to the processing material is not taken into account, so the acceleration/deceleration rate is constant. For this reason, the fourth
Deceleration start point A, deceleration completion point B, and acceleration start point C shown in the figure
There is a problem in that a large amount of tension fluctuation occurs due to a speed change at the point where one acceleration is completed, and as a result, tension fluctuation is applied to the central processing section, which adversely affects the processed product.

This invention was made to solve the above-mentioned problems, and aims to provide a process speed control device that can suppress tension fluctuations in the strip and prevent tension fluctuations from being applied to the central processing section. purpose.

[Means for solving problems]

The process speed control device according to the present invention determines the processing speed in the central processing section, the amount of processing material generated in the looper, and the scheduled stop time on the entry side of the central processing section, and based on these values, The processing material on the input side of the central processing section is stored in the looper, and the acceleration rate and deceleration rate of the processing material to be discharged are calculated.

[Effect]

The process speed control device according to the present invention controls the speed of the material to be processed on the inlet side according to the deceleration rate and acceleration rate calculated from the processing speed of the central processing section, the expected stop time on the inlet side, and the amount of material to be processed in the looper. As a result, the amount of material to be processed in the looper is effectively utilized.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, numerals 1 to 8 have the same configuration as in the conventional case shown in FIG. 2, so the explanation thereof will be omitted.

9 is an input side operation deceleration signal generator, 10 is an input side scheduled stop time calculator, and the output time t is determined by the welding capacity of the input side welding machine and the processing material, that is, in this embodiment, strip material etc. Calculated based on specifications.

11 is the deceleration rate α1. Acceleration/deceleration coal car calculator 12 calculates acceleration rate α2; 12 is acceleration/deceleration coal car calculator 11
13 is an inlet section material remaining calculation circuit, and 14 is a deceleration signal given from the inlet section remaining calculation circuit 13 to the acceleration/deceleration coal car calculation circuit 11. .

Next, the operation will be explained.

FIG. 2 shows the speed patterns of the inlet section and central processing section in this invention.

In FIG. 2, 31 is the central processing speed, 32 is the entrance speed, the solid line is the entrance speed according to the present invention, and the two-dot chain line is the conventional entrance speed. α,.

α2 is the deceleration rate and acceleration rate calculated by the acceleration/deceleration coal car calculator 11.

Diagonal line Sl, S2. S3 is the strip length, S is the strip length of the expected stop time on the entry side, S is the strip length required for entry side deceleration, and S3 is the strip length required for entry side acceleration.

In FIG. 1, the acceleration/deceleration coal car calculator 11 includes an operation signal from an inlet operation deceleration signal generator 9, a deceleration signal 14 from an inlet section material remaining calculation circuit 13, and a processing speed detector 5.
The optimum acceleration/deceleration rate of the entrance section is calculated based on the central processing speed of , the position detection amount of the looper position detector 6 at time t from the entrance scheduled stop time calculation unit 10, and the like. The calculated optimum acceleration/deceleration rate is sent to the acceleration/deceleration weight setting unit 4 via the output device 12, and the optimum acceleration/deceleration rate is set. This optimum acceleration/deceleration rate is internally processed in the speed reference generation circuit 1 and becomes the acceleration/deceleration rate of the entrance speed.

The following is the deceleration rate α1 calculated by the acceleration/deceleration coal car calculator 11,
A method for calculating the acceleration rate α2 will be described.

If the effective loop amount of the entrance looper is S, then this S, the strip length S1 for the scheduled entrance stop time mentioned above, the strip length S2 required for entrance deceleration, and the strip length S3 required for entrance acceleration. The relationship is S-Ten S + +S z +33
It is.

Here, if we set S z -33 (acceleration rate α2 and
When the deceleration rate α1 is the same), S=S+ +2・
S2・−・−−−−−−−−−−−−−−−−−−
−−−−−−(1) If the central processing speed is V and the inlet side deceleration rate is α, then from equations (1) and (2) ■2 This α1 is the effective loop amount of the inlet looper. Since this is the value when the maximum effective use is made, it is the slowest time during deceleration, and is the optimal deceleration rate during deceleration.

Next, α2 at the time of acceleration will be α2 = α if the scheduled entrance stop time t is as planned, but in reality it may be earlier or later than the scheduled time t, so at the start of acceleration (deceleration of the entrance side) When the operation signal is generated from the signal generator 9), the remaining loop amount of the inlet looper is detected and α2 is adjusted according to the actual remaining loop amount.
Determine. Remaining loop amount! Then,
In addition, the strip length S1 of the scheduled stop time on the entry side is S, = V・
The estimated time depends on the capacity of the welding machine, the thickness of the processed strip,
It is obtained by performing calculations using a board or the like.

Also, as a matter of course, α1. The calculation of α2 is performed continuously and is designed to follow changes in the central processing speed during acceleration and deceleration.

In addition, although the above embodiment shows a process control device that performs acceleration/deceleration calculations for the input side section, a looper is also provided between the central processing section and the output side section for the output side section that turns the product strip into a coil shape. The looper has exactly the same effect as the looper in the entry section. Therefore, instead of calculating the expected stop time on the input side in the input section, the expected stop (or deceleration) time on the output side is calculated (predicted calculation based on the number of sheets cut by the output shear, etc.)
By doing so, the present device can be added to conventional process control equipment in the exit section to alleviate tension fluctuations in the strip from the exit section.

〔Effect of the invention〕

As described above, according to the present invention, the strip stored in the looper is calculated by calculating an optimal and gradual acceleration/deceleration according to the processing speed in the central processing section, the scheduled stop time on the entry side, and the amount of material to be processed in the looper. Since changes in the speed of the strip and the speed of the strip to be dispensed are made gentle, fluctuations in the tension of the strip are drastically reduced, which has the effect of improving the quality of the strip.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing the configuration of a process speed control device according to an embodiment of the present invention, and FIG. 2 is a speed pattern diagram of entry-side equipment that is accelerated and decelerated by the process speed control device according to an embodiment of the present invention. , FIG. 3 is a circuit diagram showing the configuration of a conventional process speed control device, and FIG. 4 is a speed pattern diagram of entry-side equipment that is accelerated and decelerated by the conventional process speed control device. 4 is an acceleration/deceleration weight setting device, 5 is a processing speed detector, 6 is a looper position detection circuit, 10 is an entry side scheduled stop time calculator, 11
is the acceleration/deceleration coal car calculator. In each figure, the same reference numerals indicate the same or corresponding parts. Figure 1 8: Shikihan j Tsubaki p, signal - Tsukuda ¥ Figure 3 Figure 4

Claims (1)

[Claims] A process speed control device is provided with a looper for storing and discharging processing material on the entrance side of a central processing section, comprising: a processing speed detector for detecting the processing speed of the central processing section; and a processing speed detector for detecting the processing speed of the processing material in the looper. a processing material amount detector that detects the amount; an entry side scheduled stop time calculator that calculates the scheduled stop time of the processing material on the entry side of the central processing section; and the processing speed, processing material amount, and entry side stop schedule. and an acceleration/deceleration rate calculator that calculates a deceleration rate and an acceleration rate of the processing material in order to accumulate the processing material in the looper and dispense it into a predetermined processing material amount based on the time. A process speed control device, characterized in that the speed of the processing material at the entrance side of the central processing section is controlled by the deceleration rate and acceleration rate.