Tension and elongation optimization method for single-stand temper mill unit

An optimization method and elongation rate technology, applied in the direction of tension/pressure control, contour control, etc., can solve the problems affecting the regulation of the shape of the plate, lack of innovative methods and practical experience, and failure to achieve the best shape of the plate, so as to improve the shape of the plate Effect

Active Publication Date: 2021-06-29
TANGSHAN IRON & STEEL GROUP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since the tension setting of the unit in the strip steel production process is usually controlled based on experience, this makes the tension setting inaccurate and fails to achieve the best strip shape under a specific production condition, so the precise setting of the tension of the leveling unit The determination method also closely affects the regulation of the shape
At this stage, foreign research on the rolling process of skin pass units is relatively mature, and domestic breakthroughs have been made in the overall layout and design of the process flow, but there is still a lack of innovative methods and practical experience in key areas
However, there are no key methods and guiding opinions in the foreign literature, so it is necessary to conduct in-depth research and multiple experiments on the fields such as accurate tension optimization setting, rolling stability and elongation optimization under the condition of strip shape control. In-depth analysis of the influencing factors among various parameters, on the basis of improving the strip shape as the goal, innovative methods, combined with actual production information, propose a tension and elongation optimization with the goal of rolling stability and strip shape control method, and ultimately realize the optimization and improvement of the on-site strip steel smoothing process

Method used

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  • Tension and elongation optimization method for single-stand temper mill unit

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Embodiment 1

[0043] (a) Collect the equipment characteristic parameters of the single-frame skin pass unit, mainly including: the diameter D of the working roll of the frame, the original roll shape distribution value ΔD of the working roll and the backup roll wi =0,ΔD bi =0, work roll and backup roll body length L 1 =1850mm,L 2 =1850mm, working roll bending cylinder distance l 1 =2500mm, center moment of pressing screw l 2 = 2500mm, the maximum positive roll bending force allowed by work roll bending The maximum negative bending force and Machine roughness Ra of the work roll on the frame 1 =2.5μm, rolling mileage of working rolls of rack L=0km, allowable maximum value of rolling force of rack P max =8000kN, the thickness of the entrance of the rack strip in the roll copy part of the exit surface roughness affects the linear coefficient and the nonlinear coefficient respectively as α h =6.556,α h ′=1.444, Influence coefficient β of the inlet thickness of the rack strip in the ge...

Embodiment 2

[0058] (a) Collect the equipment characteristic parameters of the single-frame skin pass unit, mainly including: the diameter D of the working roll of the frame, the original roll shape distribution value ΔD of the working roll and the backup roll wi =0,ΔD bi =0, work roll and backup roll body length L 1 =1850mm,L 2 =1850mm, working roll bending cylinder distance l 1 =2500mm, center moment of pressing screw l 2 = 2500mm, the maximum positive roll bending force allowed by work roll bending The maximum negative bending force and Machine roughness Ra of the work roll on the frame 1 =2.5μm, rolling mileage of working rolls of rack L=0km, allowable maximum value of rolling force of rack P max =8000kN, the thickness of the entrance of the rack strip in the roll copy part of the exit surface roughness affects the linear coefficient and the nonlinear coefficient respectively as α h =6.556,α h ′=1.444, Influence coefficient β of the inlet thickness of the rack strip in the ge...

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Abstract

The invention relates to a tension and elongation optimization method for a single-stand temper mill unit, and belongs to the technical field of cold rolling. According to the technical scheme, production parameters of the single-rack temper mill unit are summarized, and the optimal front-back tension distribution state of the unit is calculated by integrating multiple factors; the outlet strip shape and a slip factor are taken as target functions, and the actual elongation and the set elongation are controlled within a certain range as constraint conditions; and initial front and back tension and elongation are set, production parameters meeting strip shape control and rolling stability are obtained through multiple iterations, and meanwhile the requirements of two important indexes are met. The method has the beneficial effects that the method has important guiding significance on field production, and compared with a conventional manual adjustment and plate shape feedback adjustment method, the tension calculation and setting method is closer to reality and better meets the requirements of field production, and the plate shape can be further improved.

Description

technical field [0001] The invention relates to a method for optimizing tension and elongation, which belongs to the technical field of cold rolling. Background technique [0002] Tempering plays a very important role in the production process of cold-rolled strips. The single-stand tempering unit is mainly used for tempering rolling of cold-rolled annealed coils. Since the mechanical properties and surface quality of the strip after annealing have not yet reached the target requirements, it is necessary to Smoothing is a process to improve the shape and mechanical properties of the strip. [0003] During the temper rolling process of strip steel, the shape of the strip is affected by many factors. Among them, the slippage during the rolling process seriously endangers the stability of the rolling process, resulting in fluctuations in parameters such as rolling force and tension. Induces risks such as roll rolls and broken belts. This makes reasonable avoidance or predicti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D1/05B21B37/28B21B37/48
CPCB21D1/05B21B37/28B21B37/48
Inventor 刘靖宝邝霜白振华刘春雨王朝张杰田秀刚冯晓勇谷田刘丽萍
Owner TANGSHAN IRON & STEEL GROUP
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