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Processing method of the hot rolling arrived material convexity in the computing of cold rolled sheet shape initialization

A processing method and technology of cold-rolled plates, applied in metal rolling, metal rolling, metal processing equipment, etc., can solve the problems of high price, high cost, complicated maintenance, etc., achieve good plate shape, reduce costs, and save investment Effect

Active Publication Date: 2008-03-05
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method requires an additional measurement instrument, and the instrument has many measurement positions, is expensive, and the maintenance is complicated and expensive

Method used

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  • Processing method of the hot rolling arrived material convexity in the computing of cold rolled sheet shape initialization
  • Processing method of the hot rolling arrived material convexity in the computing of cold rolled sheet shape initialization
  • Processing method of the hot rolling arrived material convexity in the computing of cold rolled sheet shape initialization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0081] In a three-electric transformation project of a tandem cold rolling mill, the incoming convexity of the roll bending force model has been processed according to the present invention, and the automatic setting of the roll bending force can be realized, and the strip shape is in good condition.

[0082] Examples of convexity processing are as follows:

[0083] Assume that the measured crown values ​​of hot rolling are shown in Table 1;

[0084] Table 1

[0085] 40.00

42.39

44.20

44.98

44.54

42.99

40.70

38.24

36.216

35.11

35.20

36.47

38.60

41.07

43.28

44.69

44.94

43.99

42.06

39.62

37.27

35.60

35.00

35.62

37.31

39.66

42.10

44.01

44.95

44.67

[0086] Assume that the total length of the steel coil is 500m, and the cutting head is 10m. Tension and leveling extension 3%, strip wid...

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Abstract

The present invention relates to shape control method for cold rolled steel strip, and discloses method of treating convexity degree of the hot rolled material in the cold rolled steel strip shape setting and calculating. The treating method includes compensating calculation based on the sectional convexity degree data from hot rolling to eliminate the error caused by post step, and calculating the current convexity degree as the input condition for the accurate pre-calculation and post-calculation of roller bending force based on the current steel strip rolling position. The present invention can realize accurate setting in the whole length of steel strip without need of complicated and costly convexity degree measuring instrument in front of the cold rolling mill, and has saving in investment and lowered cost.

Description

(1) Technical field [0001] The invention relates to a shape control method of cold-rolled strip steel, in particular to a method for processing the convexity of hot-rolled incoming materials in the calculation of cold-rolled shape setting. (2) Background technology [0002] During hot rolling, in order to make the strip run smoothly, the cross-section of the strip must always maintain a certain convexity. The crown of the hot coil for hot rolling and cold rolling is generally controlled at 0-60 μm, and the DI material is 0-40 μm. During cold rolling, the shape of the steel strip must be considered on the basis of the principle of equal-proportion convexity, so that the shape of the load roll gap matches the shape of the incoming material section, so as to ensure a good shape of the steel strip at the exit of the unit. In the actual cold rolling, when the crown of the incoming material changes, the predetermined rolling state will change, thus changing the shape of the plate...

Claims

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Application Information

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IPC IPC(8): B21B37/28B21B38/02
Inventor 李山青熊斐吴平陈军冯莲芹吴文彬王骏飞
Owner BAOSHAN IRON & STEEL CO LTD
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