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Variable coefficient looper control method

A control method and variable coefficient technology, applied in the direction of rolling mill control devices, metal rolling, manufacturing tools, etc., can solve the problems of affecting the normal operation of the rolling line, poor quality of strip steel products, economic losses, etc., and achieve the solution of strip pressure and product quality, solve stability, and ensure normal results

Active Publication Date: 2015-08-05
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of high-strength steel varieties, when rolling low-temperature thick-gauge high-strength steel, due to the mismatch between the hydraulic looper adjustment control and the looper hydraulic system, the looper between the finishing stands oscillates, which also causes the pressing to follow the oscillation. The quality of the strip steel products is poor, and in severe cases, it will lead to direct scrap steel between the racks, which seriously affects the normal production of the rolling line and brings great economic losses.

Method used

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Examples

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Effect test

Embodiment Construction

[0017] According to the target temperature of strip steel finish rolling exit (less than 830°C) and finished product thickness (greater than 7mm), it is used as a selection mark to complete the corresponding high-strength steel judgment process; and then complete the logic chain function according to the strip steel tracking signal, so as to satisfy the looper Automatic control requirements.

[0018] Under normal circumstances, the looper control between the racks after the looper is set is torque control, which can solve the technical control problem of looper adjustment. For high-strength steel looper control, the variable coefficient looper automatic control is realized by computer. By changing the coefficient C of the looper torque regulator, the control matching between the looper regulator control and the hydraulic looper system is realized, which meets the requirements of strip steel. Control process requirements. Through calculation and actual debugging, the control p...

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PUM

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Abstract

The invention belongs to the field of control of hot continuous rolling strip steel rolling lines and particularly discloses a variable-coefficient loop control method. During rolling of a plurality of rolling mills, a control chip selects a loop torque adjuster coefficient according to temperatures and thicknesses of strip steels during rolling of rolling mills, and the loop torque adjuster coefficient Yn=Yn-1+C*Kp*((1+TA / TN)* delta YEn- delta YEn-1). A loop adjusting device adjusts the magnitude of the supporting force of a loop hydraulic device according to the loop torque adjuster coefficient transmitted by the control chip. By the aid of the method, the automatic control of a hydraulic loop during rolling of low-temperature thick-specification high-strength steels is guaranteed, the problem of oscillation of the loop between finishing rolling racks is solved, and the normal hot rolling production and the product quality are guaranteed.

Description

technical field [0001] The invention belongs to the field of hot strip steel rolling line control, in particular to a variable coefficient looper control method. Background technique [0002] With the development of high-strength steel varieties, when rolling low-temperature thick-gauge high-strength steel, due to the mismatch between the hydraulic looper adjustment control and the looper hydraulic system, the looper between the finishing stands oscillates, which also causes the pressing to follow the oscillation. The quality of the strip steel product is poor, and in serious cases, it will lead to direct scrap steel between the racks, which seriously affects the normal production of the rolling line and brings great economic losses. Contents of the invention [0003] The technical problem to be solved by the present invention is to ensure the automatic control of the hydraulic looper when rolling low-temperature thick-gauge high-strength steel, to solve the oscillation ph...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/00
Inventor 张世厚武海平闫峥嵘闫丰梅
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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