JPS58158708A - Controller of rolling mill - Google Patents

Abstract

PURPOSE:To decrease the tuning time remarkably without requiring specialists, by setting the measurement of data, re-calculation and slow-down profile by means of the software. CONSTITUTION:In selecting a measuring data type mode switch 7 for the maximum slip mode, a tuning program 11 is started and a slow down profile table 2 is switched to the maximum slip measurement. In this case, when a set request is incoming, a control objective device 3 is driven according to the maximum slip measurement profile to measure the slip at the stop from the maximum notch. Similarly, a minimum slip measuring mode switch 8 is selected to measure the minimum slip. In depressing a set command PBL switch 9, the program 11 is started, the re-calculation correcting the slip is done by using a correction coefficient set switch 10 and the final slow down table is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention is an automatic position side # (generally called ^PC) device for a rolling mill that rolls sheet metal, rods, rails, pipes, etc. by placing steel materials between rotating rolls. The present invention relates to a rolling mill control device in which tuning of the slowdown profile can be performed using "software."

Fig. 1 is a block diagram showing a conventional EE rolling mill control device of this type, and (凰) is the software logic of the automatic position control device, hereinafter referred to as PC software logic.
2) is the slowdown profile table, and the above APC
The software logic (1) is the profile table (2)
) K has been tricked into slowing down/trolling. (3) is based on the above PC software logic (1)
) and a slowdown profile table (2) to form a control loop, 14
) is a measuring device connected to the control loop, and (5) is an operator console.

The conventional rolling mill control device is as above 5! has been completed,
The slowdown profile table (z) before adjustment has a value calculated in advance using the operator console. The adjustment is made by operating the APC1tlJ target device (8). That is, when the setting request signal is input, the PC software logic (1) operates, and the position of the APC control target device 13) is controlled based on the slowdown profile table (2)K. A measuring device connected to this control loop is designed to measure speed, current, voltage, etc. Then, the adjustment worker recalculates the slowdown profile table (2) based on this measurement data and re-enters the slowdown profile from the operator console (5). is repeated to find the optimal control slowdown profile.

However, according to the conventional rolling control device described above,
To perform APC slowdown tuning,
This invention solves these problems, as it requires a specialized engineer who is familiar with the contents of the slowdown profile to analyze the measurement data, and also requires a long time to tune the measurement equipment, analyze the data, and recalculate. This rolling mill was developed with a focus on data measurement, recalculation, and slowdown profile settings using software, which eliminates the need for specialized engineers and significantly shortens tuning time. The control device is provided as part 5.

That is, FIG. 2 shows an embodiment of the present invention.
In the diagram, (1) is the kPC software logic, (1) is the slowdown profile table, IS) & equipment to be controlled by the MPC such as a rolling mill, and (1) is the equipment to be controlled by the APCMII. The loop number setting switch (1 (Il+) is a measurement data type switch that selects one measurement data type, and the mode switch V? (7) is the control target when stopped from the maximum notch. This is the maximum slip amount measurement mode switch that measures the slip amount of the device +81, and the mode switch 1
11141 This is a minimum slip amount measurement mode switch that measures the slip amount of the controlled device 1g) after it has been stopped from the minimum notch. (S) is the setting command PBL switch,
A recalculation and slowdown profile table (which issues a command to reset the speed, and this FBI switch and the mode switches mentioned above are not shown in the operating set) is provided.

aI is the correction coefficient setting switch V used to correct the recalculated value, and U is the tuning program, which is software for recalculating the needle side of the data and resetting the slowdown profile (2). When the above measurement data type mode switch ('n (also) is selected, the APC software logic (1)K is connected, and the 5tCIII is configured to be activated by the setting command PBL (s)K. Since the machine control device of the invention in item 6 is configured as shown in g] 5 above, first, when one measurement data type mode switch (7), which is the maximum slip measurement mode, is selected,
The tuning program Q1 is started and the slowdown profile table (3) is switched to the maximum slip amount measurement. At this point, when there is a setting request bt, the controlled equipment; 8), that is, the rolling mill, changes to the maximum slip amount measurement It is driven according to the profile for 1 and stopped from the maximum notch! ! σ] Measure the amount of slip [8mxJ.

Similarly, select the minimum slip amount measurement mode switch (@) and measure the minimum slip amount "amln J."

Next, when the setting command PBL switch tS> is pressed, the tuning program achin is started and the
After calculating the slowdown point of each notch from mi+mj K and creating the above slowdown profile table, the final operation is to set the above correction coefficient in order to deal with the processing delay 1 mechanical "variation" K. The final slowdown table is obtained by recalculating the above-mentioned ``8ma resistance'' using Sweety, and the adjustment staff only needs to select the mode and request activation as described above. It is possible to do so.

As described above, the rolling mill control device of the present invention is configured so that measurement data collection, slowdown point calculation, and slowdown profile settings can be performed by "software". This has the excellent effect of simplifying PC slowdown tuning and shortening the tuning time. In addition, the "software" of this invention includes an APC control pair (loop number setting switch (6) for selecting which IJ to tune, a measurement data type mode switch +71 +8+, and a setting command PBL.
+9), a correction coefficient setting switch, and tuning programs aυ and K, so that it can be implemented easily and inexpensively.

In the embodiment described above, various mode switches and PBL switches were provided on the operation panel, but it is also possible to use CRT (1m polar ray tube) setting input, etc. In the example, we have described the case where the slowdown point is determined from the amount of slip of the APC controlled device, but it goes without saying that the same effect can be obtained even if the speed, voltage, or current is determined. .

[Brief explanation of the drawing]

Figure 1 is a block diagram showing a conventional rolling mill control device;
FIG. 2 is a boot diagram showing an embodiment of the present invention. In the drawing, (1) is PC software logic, (2)
is the slowdown glofill table, (8) is the Arc controlled equipment such as a rolling mill, ■ is the loop number setting switch,
(D) is a measurement data type mode switch, (9) is a setting command PBL switch, aS is a correction coefficient setting switch, and aυ is a tuning program. Note that the same reference numerals in the figures indicate the same or corresponding parts. Agent Shin Kuzuno −

Claims (3)

[Claims] (1) A rolling mill control device that tunes the slowdown profile of equipment subject to automatic position control of the rolling mill and is equipped with a 5-power air system. (2) Software system, automatic position fullj
2. The rolling mill control device according to claim 1, wherein the rolling mill control device is configured by N(Pc) software aerodynamics, a slowdown profile table, and a tuning program. (3) In the tuning program, include the loop number setting switch, measurement data type mode switch, and setting command P.
The rolling mill control device according to claim 2, further comprising a BL switch, a correction coefficient setting switch, and the like.