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Calibration method of cold-rolling mill gap closing mark

A calibration method and technology for cold rolling mills, which are applied in rolling force/roll gap control, metal rolling, metal rolling, etc. The generation of closed seam printing, the effect of reducing the impact

Active Publication Date: 2018-12-14
BENGANG STEEL PLATES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, as customers have higher and higher requirements for product quality, the objection rate of product surface quality has also been increasing in recent years, especially in high-end automotive panels

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] A calibration method for closed seam marks of a cold rolling mill, comprising the steps of:

[0019] (1) Stop the transmission: correct the selected rack to be changed;

[0020] (2) The work roll, intermediate roll, and bending roll are switched to the pressure of the horizontal roll, so that the work roll and the intermediate roll are in a non-contact state; the balance of the backup roll is in a balanced lifting state;

[0021] (3) HGC hydraulic cylinder retracts, detection + hydraulic cylinder position sensor feedback value;

[0022] (4) The roll gap is closed, and the force of the calibration cylinder is set to 1000KN for pressing; at the same time, check the action position of the hydraulic cylinder and check whether the elevation of the rolling line is correct. According to the working roll, intermediate roll, roll diameter, Hydraulic Gap Control, and hydraulic cylinder position feedback ;

[0023] (5) If the roll gap is opened 5mm successfully, the calibration ...

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PUM

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Abstract

The invention discloses a calibration method of a cold-rolling mill gap closing mark, and belongs to the technical field of steel machining. The Hydraulic Gap Control position control program is optimized, a work roller is close to strip steel by 5 mm, the Hydraulic Gap Control pressing speed is converted into low speed, the phenomenon that due to calculation deviation, during high-speed pressing,the work roller makes contact with the strip steel, due to large impactg on the work roller, and a roller mark is generated is avoided, through reduction of roller gap closing speed when the work roller will make contact with strip steel, impact on the roller is reduced, the Hydraulic Gap Control pressing speed is changed into 80% of the original speed, through the roller gap closing program optimization, impact on the roller when the roller gap is closed is reduced, the gap closing mark is prevented from being generated, and the strip steel surface quality is improved.

Description

technical field [0001] The invention belongs to the technical field of iron and steel processing, and in particular relates to a calibration method for closed seam marks of a cold rolling mill. Background technique [0002] As users have higher requirements for automobile safety and quality, high-strength and lightweight steel has become the first choice of automobile manufacturers. Benxi Steel’s three-cold rolling five-stand six-high cold rolling mill is positioned to roll high-end automotive steel. The maximum rolling force of this rolling mill is 3300T, the maximum rolling speed is 1500m / min, and the maximum rolled strip width is 2150mm. CVC roll type, the middle roll can move axially to control the flatness of the strip. [0003] However, as customers have higher and higher requirements for product quality, the objection rate of product surface quality has also been increasing in recent years, especially in high-end automotive panels. In the research on the surface qua...

Claims

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Application Information

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IPC IPC(8): B21B38/10B21B37/58
Inventor 张耀明
Owner BENGANG STEEL PLATES