JPH01288558A - Process speed controller - Google Patents

Abstract

PURPOSE:To suppress the variation of the tension of a strip by calculating the optimum and gentle accelerating/decelerating speed according to the processing speed in a central processing section, center stop estimated time, and the processed material quantity in a louver, in a continuous acid pickling line, etc. CONSTITUTION:An accelerating/decelerating speed rate calculator 11 calculates the accelerating/decelerating speed rate which is optimum and gentle in a central section on the basis of the operation signal supplied from a central operation deceleration signal generator 9, deceleration signal supplied from a central section material residual quantity calculating circuit 13, central processing speed detected by a detector 5, position detection quantity of a louver position detector 6 at the time (t) detected by a central stop estimated time calculator 10, etc., and sets the optimum accelerating/ decelerating speed rate by a setting device 4 through an output device 12. The optimum accelerating/decelerating speed rate is internally processed by a speed standard generating circuit 1 and becomes the accelerating/decelerating speed rate at the middle speed, and the middle speed standard 2 is generated, together with the exit side speed, through the contact points 8a and 8b which are turned-ON/OFF alternately by a synchronous control circuit 7, and the speed of a motor for transporting a center strip is controlled. Thus, the quality of the strip can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a process speed control device for stopping and operating a central section used in a continuous process line such as a continuous pickling line.

[Conventional technology]

Continuous process lines, such as continuous pickling systems, require continuous delivery of strips of processing material to a central processing section.

For this purpose, the strip that is continuously unwound from the central section is separated from the process line exit side by temporarily stopping or decelerating the wound strip at the exit side of the process line and dividing the subsequent winding by an exit shear or the like. It is stored in a looper located midway between the central section and the central section.

FIG. 3 shows a conventional process speed control device in the center of a process line, in which (1) is a speed reference generation circuit that generates a speed reference for the center section, (2) is a central speed reference; ) controls the speed of a motor that drives a roller (not shown) that conveys the central strip. (3) is a speed setting device, and (4) is an acceleration/deceleration weight setting device.
3) Generates or eliminates a speed standard that reaches the speed set in 3). FIG. 4 shows a pattern of process line center and exit speeds operated by a conventional process speed controller.

In the figure, θ is the center speed of the process line, which is operated at a constant speed to ensure production volume. θ is the exit velocity, which means that the winding strip is continuously unwound from the central section and accumulated while the winding strip is temporarily stopped at the exit of the process line and subsequent windings are split at the exit shear. The exit speed is higher than the center speed,
Shows the speed pattern of dispensing the strip.

[Problem to be solved by the invention]

In recent years, as equipment has become more complex, central processing sections have also been added in some cases. Now it becomes necessary to slow down and stop. This 11 means that the downstream section (output side) has become even more important than the current central processing section due to compounding. Conventional process line speed 'il+(j control equipment 1o) was configured as described above, and the central processing section was given the most importance, and the purpose was to prevent the central section from slowing down or stopping. Even when the downstream section is critical, there is no usable strip accumulated, so at the same time as the central section is stopped or decelerated, the output section of the critical section has to be stopped or decelerated, and tension fluctuations due to speed changes cause the output section to stop or decelerate. There was a problem in that it had a negative impact on the processing in the side section and was also an obstacle to improving yield.

This invention was made to solve the above-mentioned problems, and aims to reduce the number of speed changes in the exit section, suppress tension fluctuations applied to the product, improve yield, and maximize the storage capacity of the looper. The purpose is to obtain a process speed control device that can perform the following steps.

[Means to solve the problem]

The process speed control device according to the present invention determines the processing speed in the central processing section, the amount of processing material that has been generated in the looper, and the scheduled central stop time of the central processing section, and based on these values, The time required for storing the processing material in the processing section into the looper, and the acceleration rate and deceleration rate during storage and dispensing are calculated.

[Effect]

The process speed control device according to the present invention controls the speed of the material to be processed in the center according to the deceleration rate and acceleration rate calculated from the processing speed of the central processing section, the scheduled center stop time, and the amount of material to be processed in the looper. , the amount of material processed in the looper is effectively utilized 3
, [Embodiment of the Invention] An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, (1) to (4) have the same structure as the conventional case shown in FIG. 3, so their explanation will be omitted.

(5) is an exit speed detector that detects the exit processing speed in the exit section, and (6) is a processing phase-specific amount detector, in which a Loupai vertical 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 looper position detector (6). Contact (8a)
, (8b) are alternately turned ON and OFF. (9) is a central operation deceleration signal generator, 00 is a central expected stop time calculator, and the output time t is calculated from the stop time of the mechanical equipment that is owned by the central facility and that requires stopping.

(mill roll rearrangement, trimmer blade change time, etc.), 01) is the acceleration/deceleration rate that calculates the deceleration rate α7 and acceleration rate α2 from the remaining loop amount, central processing speed, and scheduled central stop time t. A rate calculator, 02 is an output device that provides the calculation result of the acceleration/deceleration amount calculator OD to the acceleration/deceleration weight setting device (4), 0 is a center section material remaining calculation circuit, 0 is a center section remaining This is an acceleration/deceleration signal given from the calculation circuit α3 to the acceleration/deceleration event calculation circuit 0].

Next, the operation will be explained.

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

In FIG. 2, 22 is the central processing speed, 2L is the output speed, the solid line is the inlet speed according to the present invention, and the two-dot chain line is the conventional central processing speed. α1 and α2 are the deceleration rate and acceleration rate calculated by the acceleration/deceleration rate calculator at 0°C.

Diagonal lines S1, S2, and S3 are strip lengths, with Sl indicating the strip length for the scheduled center stop time, S2 indicating the strip length necessary for center deceleration, and S3 indicating the strip length necessary for center acceleration.

In FIG. 1, the acceleration/deceleration rate calculator αD includes an operation signal from the central operation deceleration signal generator (9), a deceleration signal α (a) from the central section material remaining calculation circuit (to), and a processing speed detector ( 5) The optimum acceleration/deceleration rate of the central section is calculated based on the central processing speed, the position detection amount of the looper position detector (6) at time t from the central expected stop time calculator Od, etc. This calculated optimum acceleration/deceleration rate is sent to the acceleration/deceleration event setting device (4) via the output device @, and sets the optimum acceleration/deceleration rate. This optimum acceleration/deceleration rate becomes the acceleration/deceleration rate of the center speed due to internal processing in the speed reference generation circuit (1).

Next, the central operation deceleration signal generator (9) will be described.

Conventionally, this device has a central processing speed of σ),
It was operated according to the set speed standard, regardless of the loop amount on the exit side.

In the process speed control device according to the present invention, since the exit side section is considered important, the output side loop amount is no longer relevant, and acceleration/deceleration is determined based on the exit side loop amount.

The method for calculating the acceleration and deceleration signals of the central operation deceleration signal generator (9) will be described below.

If the effective loop amount of the exit side looper is S, the relationship between this S and the strip length S1 of the scheduled center stop time, the strip length S2 necessary for center deceleration, and the strip length S3 necessary for center acceleration is as follows. S'' S1+S2+S3.

That is, if the center speed is controlled in advance so that the loop amount of the exit side looper becomes S (there is a speed difference between the center and the exit side), the exit side section can be operated without stopping or decelerating. I can do it.

The method of calculating the control point of this center operation deceleration signal generator (9), that is, the difference speed point between the center speed and the exit speed is as follows.

VC-VD VC-VD - Differential speed (center speed - exit speed) Center section specific stopping point requires stopping VO - Center current speed, VC = Center acceleration completion speed α2 at the time of next acceleration is the center If the scheduled stop time t is as scheduled, the result will be a2-α], but in reality it may be earlier or later than the scheduled time t, so at the start of acceleration (the operation signal from the central operation deceleration signal generator (9) (time), the remaining loop ring of the output looper is detected, and α2 is determined according to the actual remaining loop amount. If the remaining loop amount fPe is "・= 24," the strip length S of the scheduled central stop time is S, = V-
The scheduled time t is the machine equipment capacity and the thickness of the processing strip,
Calculation is performed by board etc. and it is obtained by -.

Further, as a matter of course, the calculations of α1 and α2 are performed continuously, and are 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 calculates acceleration/deceleration of the center section, if the center section is considered important as before, the exit side stop (or deceleration ) By performing scheduled time calculations (predictive calculations based on the number of sheets cut by the exit shear, etc.), this device can be added to the conventional process control device of the exit section to alleviate tension fluctuations in the strip from the exit section. be able to.

〔Effect of the invention〕

As described above, according to the present invention, by calculating the optimum and gradual acceleration/deceleration according to the processing speed in the central processing section, the scheduled central stop time, and the amount of processing material '#4 in the looper, By making the changes in the speed of the stored strip and the speed of the dispensing strip gradual, and by maximizing the storage capacity of the exit side looper, we have reduced the number of speed changes in the exit section. Tension fluctuations 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 central 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 diagram showing speed patterns of central and outlet equipment that are accelerated and decelerated by the conventional process speed control device.

Claims (1)

[Claims] The processing material is stored on the outlet side of the central processing section.
In a process speed control device provided with a looper for dispensing, the processing speed detector detects the processing speed of the central processing section, the processing material amount detector detects the amount of the processing material in the looper, and the central processing Based on the scheduled central stop time calculation unit that calculates the scheduled stop time of the processed material in the section, the processing speed, the amount of processed material, and the scheduled central stop time, the processed material is stored in the looper and dispensed at a predetermined time. and an acceleration/deceleration rate calculator that calculates the deceleration rate and acceleration rate of the processing material to achieve the processing material amount in the central processing section. A process speed control device characterized by controlling speed.