Comprehensive setting method for tension and rolling pressure in VC (Variable Crown) roll temper mill wet leveling process

A technology of rolling pressure and setting method, applied in tension/pressure control, rolling force/roll gap control, etc., can solve the problems affecting rolling efficiency and product quality, small finished product roughness, unqualified products, etc.

Active Publication Date: 2014-08-06
BAOSHAN IRON & STEEL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the parameter setting of the metal model is seriously unreasonable and exceeds the controllable range of the parameters of the roll system, then unqualified products will be generated, resulting in downgrading and bringing large economic losses to the unit
For example, if the setting of rolling pressure and tension is unreasonable, so that the lower limit of elongation is taken under the premise of satisfying the mechanical properties, it may cause the roughness reproduction rate to be low, resulting in a small roughness of the finished product
In particular, for wet temper rolling, the setting of metal model parameters must not only consider quality indicators such as plate shape, mechanical properties, and surface roughness, but also consider rolling stability, and no slippage, vibration, etc. The problem is that this is different from dry temper rolling, and it is often easily overlooked by the site, resulting in unstable rolling and affecting rolling efficiency and product quality

Method used

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  • Comprehensive setting method for tension and rolling pressure in VC (Variable Crown) roll temper mill wet leveling process
  • Comprehensive setting method for tension and rolling pressure in VC (Variable Crown) roll temper mill wet leveling process
  • Comprehensive setting method for tension and rolling pressure in VC (Variable Crown) roll temper mill wet leveling process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0108] use figure 1 The box process shown.

[0109] In step (a), the equipment characteristic parameters of the VC roll leveling unit are collected, mainly including:

[0110] Work roll diameter DW and backup roll diameter Db are:

[0111] D. w =530mm,D b =1400mm;

[0112] Work roll original roll shape distribution value ΔD wi and backup roll original roll shape distribution value ΔD bi They are:

[0113] ΔD wi =0,ΔD bi =0;

[0114] Work roll body length L 1 and backup roll body length L 2 They are:

[0115] L 1 =1650mm,L 2 =1620mm;

[0116] Cylinder spacing of inner bending rolls of work rolls l 21 And outer bending roller cylinder distance l 22 Respectively: l 21 =2320mm,l 22 =3120mm;

[0117] Depress the center moment of the screw l 1 =2720mm;

[0118] The inner bending roll allows the maximum positive bending force and the outer bending roll allows the maximum positive bending force They are:

[0119] S 1 ...

Embodiment 2

[0170] First, in step (a), the equipment characteristic parameters of the VC roll skin pass unit are collected, mainly including: working roll and backup roll diameter D w =510mm,D b =1400mm; original roll shape distribution value of work roll and backup roll ΔD wi =0,ΔD bi =0; work roll and backup roll body length L 1 =1650mm,L 2 =1620mm; work roll inner and outer bending roll cylinder distance l 21 =2320mm,l 22 =3120mm; Depress the center moment of the screw l 1 =2720mm; the inner and outer bending rollers allow the maximum positive bending force The maximum negative bending force allowed by the inner and outer bending rolls VC roller allowable maximum oil pressure p max =49MPa, work roll surface roughness set value Ra r =2.2μm, the number of rolling kilometers L=255km, the maximum allowable rolling pressure P max =16000kN;

[0171] In step (b), the key strip rolling process parameters to be comprehensively set for strip shape parameters are collected, mainl...

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Abstract

The invention provides a comprehensive setting method for tension and rolling pressure in a VC (Variable Crown) roll temper mill wet leveling process and belongs to the field of controlling. The comprehensive setting method comprises the following steps: related parameters are set by a temper mill control computer; related data or operational plans are acquired by the control computer through an input device or a superior computer; all operational parameters of the temper mill are controlled according to a pre-setting control mode, a method or setting parameters; all original values and optimizing step lengths are set according to equipment, technologies and quality parameters; under the premise of making ' taking rolling stability as optimized objective function and the finished product shapes, mechanical properties and surface roughness are qualified' as a constraint condition, three parts of metal model parameters such as rolling pressure, forwards and backwards tension and the like are taken as a whole to be set harmoniously; the rolling force and the forwards and backwards tension are set optimally; under the premise of guaranteeing product mechanical properties, the product mechanical properties, comprehensive control capability of the shapes and surface quality are improved, the production efficiency is guaranteed and the product quality is improved simultaneously.

Description

technical field [0001] The invention belongs to the field of metal machining, and in particular relates to a control method for production equipment of metal plate products. Background technique [0002] With the increasing demand of industries such as household appliances, automobiles, electronics, construction, shipbuilding, military industry, and aerospace, the strip production industry has developed rapidly. Today, the strip ratio has become one of the important symbols to measure the level of a country's steel industry. [0003] As the process closest to the finished product in the production of cold-rolled strip, leveling can not only ensure the mechanical properties and shape quality of the annealed product by controlling the elongation and shape of the strip, but also form a certain roughness on the surface of the strip. To achieve the purpose of improving the strip coating performance and formability. [0004] With the continuous improvement of users' requirements...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/48B21B37/58
Inventor 魏圣明柯阳林白云武陈东辉白振华马续创
Owner BAOSHAN IRON & STEEL CO LTD
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