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A quarter corrugated shape control method for five-stand continuous cold rolling high-strength steel strip

A five-stand cold continuous rolling, high-strength steel plate technology, applied in the direction of profile control, can solve the problems of reducing the control ability of the middle stand, increasing the pressure of the last stand to eliminate the shape defect, so as to improve the shape quality and reduce the The effect of regulating pressure and improving control accuracy

Active Publication Date: 2020-03-31
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, the adjustment ability of the quarter-wave plate shape defect of the middle frame is reduced, and the pressure of the end frame to eliminate the plate shape defect is increased.

Method used

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  • A quarter corrugated shape control method for five-stand continuous cold rolling high-strength steel strip
  • A quarter corrugated shape control method for five-stand continuous cold rolling high-strength steel strip
  • A quarter corrugated shape control method for five-stand continuous cold rolling high-strength steel strip

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0101] Preparation thickness is 2.75mm, and width is the QP980 automobile dual-phase steel strip of 1250mm, after five times of continuous cold rolling, be rolled into the plate strip that thickness is 0.7mm, adopt five stands cold rolling high-strength steel plate of the present invention Before and after the quarter corrugated control method of the belt is controlled, the parameters of the lateral movement of the intermediate rollers of each frame are shown in Table 1:

[0102] Table 1 The method of the present invention puts into use before and after each frame intermediate roller traverse parameter

[0103]

[0104] As can be seen from Table 1, before the method of the present invention is put into use, the intermediate roller traverse of the fifth frame has approached the limit value, while the intermediate roller traverse of the front several frames still has a margin. Figure 5 It is the shape of the finished strip before the method of the present invention is put in...

Embodiment 2

[0106] Preparation thickness is 4.0mm, and width is the DP980 automobile dual-phase steel strip of 1150mm, after five times of continuous cold rolling, be rolled into the plate strip that thickness is 1.8mm, adopt five stand cold rolling high-strength steel plates of the present invention Before and after the quarter corrugated control method of the belt is controlled, the parameters of the lateral movement of the intermediate rollers of each frame are shown in Table 2:

[0107] Table 2 The parameters of the lateral movement of the intermediate rollers of each frame before and after the method of the present invention is put into use

[0108]

[0109] As can be seen from Table 2, before the method of the present invention is put into use, the traverse of the middle roller of the fifth frame is close to the limit value, while the traverse of the intermediate rollers of several front stands still has a margin. Figure 7 It is the shape of the finished strip before the method ...

Embodiment 3

[0111] Preparation thickness is 3.0mm, and width is the DP780 automobile dual-phase steel strip of 1200mm, after five times of continuous cold rolling, be rolled into the plate strip that thickness is 0.8mm, adopt five stand cold rolling high-strength steel plates of the present invention Before and after the quarter corrugated control method of the belt is controlled, the parameters of the lateral movement of the intermediate rollers of each frame are shown in Table 3:

[0112] Table 3 The method of the present invention puts into use before and after each frame middle roller traverse parameter

[0113]

[0114] As can be seen from Table 3, before the method of the present invention is put into use, the traverse of the middle roller of the fifth frame is close to the limit value, while the traverse of the intermediate roller of the front several frames still has a margin. Figure 9 It is the shape of the finished strip before the method of the present invention is put into...

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Abstract

The invention provides a quarter-wave plate shape control method for a cold continuous rolling high-strength steel plate strip through five racks and relates to the technical field of control over theshape of cold continuous rolling strip steel plates. According to the method, a precondition that the method is adopted for controlling the quarter-wave plate shape is provided at first, then the final rack is arranged as the i-th rack, and a quarter-wave plate shape value at an outlet of the i-1-th rack is calculated; a quarter-wave plate shape calculated value at an outlet of the i-th rack is compared with an actually measured value, and repeated calculation is conducted until plate shape quality requirements of finished products are met; then a correction value of transverse movement of amiddle roller of the i-1-th rack is calculated, and if the requirements are not met, a correction value of the transverse movement of a middle roller of the i-2-th rack after correction is calculateduntil a plate shape quarter-wave deviation at the outlet of the i-th rack meets the plate shape quality requirements of the finished products. According to the provided control method, the quarter-wave plate shape control precision of the front rack is improved, the adjustment and control pressure of the final rack is reduced, and the plate shape quality of the products is improved.

Description

technical field [0001] The invention relates to the technical field of cold-rolled strip shape control technology, in particular to a method for controlling the quarter-corrugated shape of a five-stand cold-rolled high-strength steel strip. Background technique [0002] Cold-rolled steel strips are widely used in various fields of the national economy. With the improvement of the quality of cold-rolled steel strips, users' requirements for the shape quality are also gradually increasing. Good shape quality plays a vital role in improving product quality and yield in downstream processes. [0003] Like the thickness and width, the strip shape is an important index to measure the geometrical accuracy of the strip steel. It is the degree of warping of the strip steel intuitively, and its essence is the distribution of the internal residual stress of the strip steel along the width direction of the strip after rolling. Common board shape defects are mainly divided into edge wav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/28
CPCB21B37/28
Inventor 彭良贵金鑫王煜李长生武志成
Owner NORTHEASTERN UNIV LIAONING
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