Quick and precise elongation control method for temper mill

A technology of precise control and elongation rate, applied in the direction of elongation rate control, etc., can solve the problems of lack of fast real-time response characteristics and stable control methods, and achieve the effect of fast real-time response characteristics and strong system stability

Active Publication Date: 2013-01-16
ANGANG STEEL CO LTD
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Problems solved by technology

The method proposed in the article has a certain effect on the control of elongation rate and anti-disturbance, but it lacks the characteristics of fast real-time response and the control method of stability

Method used

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  • Quick and precise elongation control method for temper mill
  • Quick and precise elongation control method for temper mill
  • Quick and precise elongation control method for temper mill

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Experimental program
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Effect test

Embodiment Construction

[0024] see Figure 1~3 , the specific steps are as follows:

[0025] Step 1. Design of the elongation control system of the temper mill, including the selection of controller software and hardware and the construction of the control system platform:

[0026] The control system hardware selects Siemens S7-400 series PLC and FM458 series high-speed closed-loop control module. S7-400 is selected for elongation control mode selection and start-stop logic, FM458 module is used as elongation controller, FM448 module is used for field bus data communication, and FM438 module is used for input and output signal processing. The elongation detection part adopts two methods of laser speedometer and encoder. The control software adopts Siemens STEP 7 V5.3 and D7 SYS system development environment.

[0027] Step 2. Elongation detection system of temper mill:

[0028] Two methods of laser velocimeter and encoder are used for actual elongation detection. The laser velocimeter is connect...

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PUM

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Abstract

The invention discloses a quick and precise elongation control method for a temper mill. Double closed-loop control systems are adopted by the method, an inner loop control system is responsible for rolling force control, and an outer loop control system is responsible for elongation control including dynamic compensation control. The rolling force closed-loop control system adopts a mode of sum rolling force control and difference rolling force control of an operating side and a transmission side, and a hydraulic cylinder servo valve adopts a leakage compensation integral control mode. An elongation control loop adopts a dynamic variable-gain adaptive control method to calculate deviation of rolling force for correcting controller gain in real time by means of an integral inverse method. A mathematical model between speed fluctuation and elongation is set up aiming at the problem of high fluctuation of the elongation in a decelerating phase, and elongation control is jointly completed by the rolling force pre-control compensation control method and elongation closed loops.

Description

technical field [0001] The invention belongs to the field of metallurgical production process automation, and relates to an elongation control method of a tempering machine in a cold rolling production line. Background technique [0002] In the production process of cold-rolled strip steel, elongation is an important technical index of the product. The quality of the elongation control performance is directly related to the quality of the product. Because in the production process, the elongation rate has the characteristics of lagging, time-varying, nonlinear, and mathematical models are difficult to establish accurately, especially in the process of increasing and decelerating the tempering machine, the elongation rate fluctuates even more. Therefore, it is difficult to obtain a satisfactory control effect by using the conventional incremental PID algorithm. "Application and Research on Elongation Control System of Cold Rolling and Tempering Mill" (Journal of Iron and St...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/56
Inventor 秦大伟王军生宋君刘宝权张岩侯永刚费静吴萌
Owner ANGANG STEEL CO LTD
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