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Method for leveling strip produced by secondary cold rolling unit

A secondary cold rolling and strip technology, applied in the field of strip rolling, can solve problems such as unstable surface quality and poor control of product shape

Active Publication Date: 2009-08-26
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the actual production process, how to control and adjust the surface roughness and shape quality of the finished product has always been a problem that those skilled in the art are eager to solve. In the past operation process, the rolling process parameters of the strip The setting and adjustment of various parameters such as the equipment process of the cold rolling unit and on-site rolling parameters generally depend on the operator's experience estimation, so it often results in poor control of the product's plate shape and unstable surface quality

Method used

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  • Method for leveling strip produced by secondary cold rolling unit
  • Method for leveling strip produced by secondary cold rolling unit
  • Method for leveling strip produced by secondary cold rolling unit

Examples

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no. 1 Embodiment

[0073] Figure 4 It is the general flowchart of the leveling method of the strip produced by the secondary cold rolling mill of the present invention, and the leveling method specifically includes the following steps:

[0074] (A) determine the rolling process parameters of the strip to be rolled and the equipment parameters of the cold rolling mill;

[0075] (B) input the parameters determined in the step (A) into the control calculator, and obtain the rolling process setting value according to the established calculation model and the control objective function;

[0076] (C) Carry out a secondary cold rolling process according to the obtained rolling process setting value.

[0077] Wherein the calculation process of step (B) is as follows Figure 5 The steps shown are performed:

[0078] (a) determining the set value of the original surface roughness of the work rolls of the first stand and the second stand;

[0079] (b) determine the elongation distribution coefficient ...

no. 2 Embodiment

[0120] In order to further illustrate the present invention, a high-gloss mirror panel with a material size of 0.20×1200mm and a total elongation of 1.2% is taken as an example to describe the production method and related effects of a specific high-gloss mirror panel on a specific unit.

[0121] First also in step a, the surface roughness of the first and second rack work rolls is set:

[0122] Collect the key rolling process parameters of the high-gloss mirror panel to be rolled, mainly including: the thickness lateral distribution value H of the incoming strip material i ={0.20, 0.20, 0.20, 0.20, 0.20, 0.20, 0.20, 0.20, 0.20, 0.20}; the lateral distribution value L of incoming plate shape i = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; strip width B = 1200mm; elongation setting value ε 0 =1.2%; allowable limit value ξ of elongation distribution coefficient between racks max = 0.75, ξ min =0.25; Strip incoming roughness Ra strip0 =0.35μm; finished strip requires roughness Ra strip1...

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Abstract

The invention provides a method for leveling a strip produced by a secondary cold rolling unit, which controls the surface roughness of the strip by reasonably setting the partition coefficients of the roughness and elongation of the working rolls of first and second machine frames and controls the shapes of finished strips other possible surface defects by reasonably setting a bending-roller force, a roll shifting rate and the tension of the front, middle and rear sections of the machine frames to achieve uniform front tension of finished strips and uniform horizontal distribution of a rolling force, thereby establishing effectively improved technology for leveling high-brightness micro plates produced by a secondary cold rolling unit. The principle of the method is clear, a secondary cold rolling process is carried out smoothly according to obtained rolling process set values, the quality of the shape and surface of leveled strips is high, the calculation is quick, and the method issuitable for online use.

Description

technical field [0001] The invention relates to a strip rolling method, in particular to a flattening method for producing strips, especially high-brightness mirror panels, by adopting a secondary cold rolling unit. Background technique [0002] Strip materials (such as strip steel) are widely used in various industries. Among them, high-gloss mirror panels, as a kind of strip steel with huge demand in the domestic market, are mainly used in tableware, lamps, locks, gift boxes, lighters, etc. It is characterized by extremely high requirements on the shape and surface quality of related products. Taking the surface quality as an example, for a high-gloss mirror panel that meets the processing requirements of modern appliances, its surface roughness must be controlled below 0.1 μm, and there must be no chromatic aberration. [0003] However, since the country mainly relied on imports for high-gloss mirror panels, the development of related flattening production processes is s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/28B21B37/30B21B37/56B21B37/48B21B37/42
Inventor 吴首民李秀军陈杰虞坚居天成贾复生蔡晶李良史祖良
Owner BAOSHAN IRON & STEEL CO LTD
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