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Control method for compensating speed drop of finishing stand in hot continuous rolling

A control method and hot continuous rolling technology, applied in the field of steel rolling, can solve the problems of unstable finishing rolling, high rolling pressure, scrap steel, etc., achieve stable speed control of stands, reduce scrap between stands, and looper control. improved effect

Active Publication Date: 2016-06-29
SHANXI TAIGANG STAINLESS STEEL CO LTD
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AI Technical Summary

Problems solved by technology

[0002] Due to the different materials and temperatures of the special steel varieties rolled by Taiyuan Iron and Steel Co., Ltd., the rolling pressure and speed drop are large when the strip is threaded in the finishing rolling unit, which can easily cause abnormal movement of the looper between the stands, resulting in Unstable rolling of finish rolling or even scrap steel and damage to mechanical equipment

Method used

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  • Control method for compensating speed drop of finishing stand in hot continuous rolling

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Embodiment Construction

[0015] High-strength steel TQ750 specification 3mm*1250mm and TQ700 specification 7mm*1250mm two specifications of hot rolling finishing stand compensation speed drop control method, the speed compensation value of each stand is as follows:

[0016] 3mm*1250mm

[0017] .

[0018] 7mm*1250mm

[0019]

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Abstract

The invention discloses a control method for compensating speed drop of a finishing stand in hot continuous rolling, which belongs to the field of steel rolling, that is, before the finish rolling stand bites steel, a speed compensation value is pre-added to the stand, and the speed compensation value is 2% of the reference value of the stand speed ~5%, after the bite time of 100-200ms, cancel the speed compensation value and restore the frame speed reference value for rolling. The invention reduces the speed drop of the racks biting the steel, ensures the normal control of the strip loop between the racks, reduces the scrap steel of the rolling line, and obtains good benefits.

Description

technical field [0001] The invention belongs to the field of steel rolling, and in particular relates to an automatic speed control method of a hot continuous strip steel finishing rolling unit. Background technique [0002] Due to the different materials and temperatures of the special steel varieties rolled by Taiyuan Iron and Steel Co., Ltd., the rolling pressure and speed drop are large when the strip is threaded in the finishing rolling unit, which can easily cause abnormal movement of the looper between the stands, resulting in Unstable rolling of finish rolling may even produce scrap steel and damage mechanical equipment. Therefore, to solve the problem of different speed drops under different loads of finishing stands and to ensure rolling stability, one of the keys is the compensation speed drop control of hot rolling finishing stands. Contents of the invention [0003] The purpose of the present invention is to effectively ensure the action of the looper between...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/58
Inventor 张世厚康炜
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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