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Method for leveling strip produced by secondary cold rolling unit

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

Active Publication Date: 2013-06-19
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

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no. 1 Embodiment

[0073] Figure 4 This is the general flow chart of the method for leveling strips 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) the parameters determined in the step (A) are input into the control calculator, and the rolling process setting value is obtained according to the established calculation model and the control objective function;

[0076] (C) The secondary cold rolling process is carried out according to the obtained rolling process setting value.

[0077] Wherein the calculation flow of step (B) is as follows Figure 5 Follow the steps shown:

[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) determining the elongation distribution coe...

no. 2 Embodiment

[0123] In order to further illustrate the present invention, a high-brightness mirror panel with a material size of 0.20×1200 mm and a total elongation of 1.2% is used as an example to describe the production method and related effects of a specific high-brightness mirror panel on a specific unit.

[0124] First, also in step a, set the surface roughness of the first and second stand work rolls:

[0125] Collect the key rolling process parameters of the high-brightness mirror panel to be rolled, mainly including: the thickness transverse 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}; horizontal distribution value L of incoming sheet shape i ={0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; strip width B=1200mm; elongation set value ε 0 = 1.2%; allowable limit value of elongation distribution coefficient between racks ξ max =0.75, ξ min =0.25; strip material roughness Ra strip0 =0.35μm; the finished strip requires roughne...

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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 method for rolling strips, in particular to a flattening method for producing strips, especially high-brightness mirror panels, by using a secondary cold rolling unit. Background technique [0002] Strips (such as strip steel) are widely used in all walks of life. Among them, high-gloss mirror panels, as a kind of strip steel with huge demand in the domestic market, are mainly used for tableware, lamps, locks, gift boxes, lighters, etc. It is characterized by extremely high requirements on the shape and surface quality of related products. Taking surface quality as an example, for high-brightness mirror panels that meet the processing requirements of modern appliances, the surface roughness must be controlled below 0.1 μm, and there should be no chromatic aberration. [0003] However, because the domestic high-brightness mirror panel mainly relied on imports, the development of the related flat production process is still in...

Claims

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Application Information

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Patent Type & Authority Patents(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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