Cold-strip steel edge drop method through working roll asymmetric shifting control

A technology for edge thinning and cold-rolling strip steel, which is applied in rolling mill control devices, metal rolling, manufacturing tools, etc.

Active Publication Date: 2015-10-14
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for incoming hot-rolled materials with different convexities on both sides, symmetrical roll shifting cannot achieve the ideal edge drop control effect
Similarly, when the entrance strip deviates, it is difficult to achieve the ideal edge drop control effect by using symmetrical roll shifting.

Method used

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  • Cold-strip steel edge drop method through working roll asymmetric shifting control
  • Cold-strip steel edge drop method through working roll asymmetric shifting control
  • Cold-strip steel edge drop method through working roll asymmetric shifting control

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Embodiment Construction

[0053] The tapered roll is placed on different racks, and the effect of improving strip edge thinning is different. Putting it on the 1# rack can improve 40%, 2# rack can improve 30%, and the total improvement effect of the other racks does not exceed 30% %. Therefore, in consideration of equipment investment, edge thinning control effect, equipment operation cost, etc., it is suggested to add asymmetric roll shifting of work rolls to the 1#-3# stands of the tandem cold rolling mill during the implementation process.

[0054] Instrument and hardware configuration scheme of the present invention are:

[0055] The cold tandem mill is equipped with an entrance multi-point crown gauge, which has the function of measuring width.

[0056] The cold tandem mill is equipped with an exit multi-point crown gauge and an exit multi-point edge drop instrument, which have the strip edge positioning function.

[0057] T-WRS work rolls are adopted; both the upper and lower work rolls can be ...

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Abstract

The invention provides a cold-strip steel edge drop method through working roll asymmetric shifting control, which comprises the steps that the width of entrance strip steel serves as feedforward presetting control; practical convexity degrees of the two sides of an incoming material are measured by an entrance multipoint convexity gauge, and tapered section insertion quantities of tapered working rolls on a driving side and an operation side are calculated by the feedforward control and serve as the feedforward presetting control; an incoming material running deviation measured by the entrance multipoint convexity gauge serves as the feedforward presetting control; practical edge drops of the two sides of finished strip steel are measured by an exit multipoint edge drop gauge, and the tapered section insertion quantities of the tapered working rolls on the driving side and the operation side are calculated by a feedback closed-loop control model; and according to position changes of the single-taper working rolls on the driving side and the operation side, bending compensation control on the working rolls is performed. Through independent shifting of an upper working roll and lower working roll, and independent roll bending of the working rolls on the operation side and the driving side, independent control on the thicknesses of the two side edges of the strip steel is realized, the incoming material with different convexity degrees on the two sides reaches a perfect edge drop effect, and the influence from strip steel off-tracking on the edge drop is compensated.

Description

technical field [0001] The invention belongs to the field of steel rolling control, and in particular relates to a method for asymmetrical shifting of work rolls to control edge thinning of cold-rolled strip steel. Background technique [0002] Edge thinning (also known as edge drop) is a very important cross-sectional quality index of cold-rolled strips, and is extremely critical for cold-rolled electrical steel products. The quality control of edge thinning directly affects the stability of the user's sheet punching process and the quality of the lamination coefficient after punching, and also directly affects the amount of edge trimming in the cold rolling production process. [0003] Usually edge thinning is defined as ΔE=H 115 -H 15 , where H 115 is the thickness at 115mm from the edge, H 15 It is the thickness at 15mm from the edge. With the continuous improvement of customer demand, it is usually required that the edge thinning ΔE≤7μm, which is difficult to achie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/20
CPCB21B37/20
Inventor 刘宝权王军生张岩侯永刚秦大伟宋君吴萌柴明亮费静王奎越
Owner ANGANG STEEL CO LTD
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