Optimization technology of roll contours during skin-pass rolling process of hot-rolled strip
Materials Science Forum, ISSN: 1662-9752, Vol: 944 MSF, Page: 237-246
2018
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Metrics Details
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Conference Paper Description
The hot-rolled strip skin-pass mill is the important technological equipment of finishing process in the hot rolling plant, and its role is to apply a slight thickness reduction of approximately 1%-4% to the finished products cooled to room temperature to repair flatness defects and improve the surface quality and mechanical properties. In this study, the initial flat roll contours were optimized to solve some problems such as the serious and non-uniform wear of work rolls and the poor shape control abilities of the strip. A three-dimensional rolls–strip coupling model of hot-rolled strip skin-pass mill was established using the nonlinear finite element software ABAQUS. The effects of the roll contours on the contact pressure between rolls and the control effect of bending forces were analyzed, and a variable contact-length backup roll (VCR) contour configured with a positive crown contour for work rolls was proposed. Compared with the initial flat roll contours, the average replacement cycle of work rolls for the optimized roll contours increased from 465.4 tons to 701.3 tons, the non-uniform wear amount was reduced by nearly 15%, and the adjustment ratio of the negative bending forces decreased from-100% to-40% by industrial experiments in the 1580 mm single-stand four-high hot-rolled strip skin-pass mill.
Bibliographic Details
Trans Tech Publications, Ltd.
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