Roller contour process for rolling of plates of middle thickness
A roll shape and process technology, applied in the direction of rolls, metal rolling, manufacturing tools, etc., can solve the problems of excessive plate convexity and flatness defects, and achieve the improvement of quality image, significant economic benefits, and significant social benefits. Effect
Active Publication Date: 2016-07-06
SGIS SONGSHAN CO LTD
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Problems solved by technology
[0007] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a roll shape process for medium and heavy plate rolling, which can completely improve the excessive convexity of the plate shape and obvious flatness defects in the 3450mm medium and heavy plate production line of Shaoguan Iron and Steel Co., Ltd. question
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[0067] For the 3450mm production line of Shaoguan Iron and Steel Co., Ltd., the roll shape curve adopted by the backup roll is as follows:
[0068] As for the work rolls, according to the usage on site, they are divided into the following stages according to the rolling tonnage of the backup rolls:
[0069] The first stage: the rolling tonnage is 0~15,000 tons, at this time, the work roll crown with a radius value of 0.18mm is used (the 0.18mm crown here is the difference between the radius value at the middle position of the roll and the radius value at the extreme end position , the same below), such as figure 2 Shown in the specific roll shape equation ~ as follows:
[0070]
[0071] The second stage: the rolling tonnage is 15,000~50,000 tons. At this time, the radius value of the work roll is 0.21mm. image 3 Shown in the specific roll shape equation ~ as follows:
[0072]
[0073] The third stage: the rolling tonnage is 50,000~80,000 tons. At this time, ...
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The invention relates to a roller contour process for rolling of plates of middle thickness. The process includes the steps that the middle of the roller contour of a supporting roller is a sextic polynomial roller contour, the two ends of the roller contour of the supporting roller are linear chamfers, and the roller contour of the supporting roller is named as an SGB supporting roller contour and is specifically required as follows: according to the design objectives of the SGB supporting roller contour, firstly, the harmful contact zone of a working roller and the supporting roller is reduced so as to reduce the convexity of rolled plates, and secondly, the SGB supporting roller contour can achieve a certain self-keeping function so that the later plate shape convexity of the supporting roller can be effectively reduced; and a working roller contour is a sextic polynomial roller contour and named as an SGW working roller contour which is specifically required as follows: according to the design objectives of the SGW working roller contour, firstly, the convexity of the rolled plates is reduced, and secondly the flatness of the rolled plates is guaranteed so that the situation that large waves occur due to regulation of the convexity can be prevented. After the SGB supporting roller contour, the SGW working roller contour and the matched using process are adopted, the plate shape convexity of a unit is controlled obviously, and the average convexity of the unit is reduced to 0.07 mm or below from original 0.30 mm or above before the process is used.
Description
technical field [0001] The invention belongs to the technical field of steel rolling technology, and relates to a roll shape technology for medium and thick plate rolling. Background technique [0002] As one of the most important products of the iron and steel industry, medium and thick plates play a very important role in the development of the national economy. It is widely used in industry, agriculture, national defense and daily life. With the rapid development of modern industry and science and technology, the vast number of users of industrial enterprises have put forward more and more strict requirements on the quality of medium and heavy plates. [0003] Convexity is an important indicator of the quality and cost control of medium and heavy plates. Excessive convexity will seriously affect the quality and accuracy of plates and increase the cost of plates. How to improve the level of crown control of medium and heavy plates is a problem that needs to be solved in t...
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IPC IPC(8): B21B27/02
CPCB21B27/02B21B2267/19
Inventor 戴文笠陈亚辉张祖江戴杰涛武秀琪吴世庆孙建伟叶新富
Owner SGIS SONGSHAN CO LTD