Dual-conicity working roll and roll shape design method thereof

Abstract

The invention provides a dual-conicity working roll and a roll shape design method thereof, and belongs to the technical field of plate-strip rolling roll shape design. The working roll mainly comprises three curves, a middle convexity control segment and edge drop control segments on the two sides. The two ends of the middle convexity control segment are tangent to the edge drop control segments correspondingly, and smooth transition of the curves is achieved. The special roll shape curves are adopted in the edge drop control segments, and the edge drop is effectively controlled. A quadratic parabola form is adopted in the middle convexity control segment, and the control requirement for the convexity of strip steel can be met. By means of the roll shape parameter correspondence relation provided by the method, the dual-conicity roll shape with the edge drop control capacity can be flexibly designed according to the production requirement of a hot rolling field.

Description

technical field [0001] The invention relates to the technical field of roll shape design for strip rolling, in particular to a double-taper work roll and a roll shape design method thereof. Background technique [0002] At present, it has gradually become a development trend for hot-rolled products to be hot-rolled and cold-rolled, and to be thin. Control has become a difficult point in the shape control of hot-rolled high-precision strip production. The existing hot rolling control methods can achieve effective secondary crown control through roll bending, roll crossing, etc., but they can't do anything about the edge drop zone. How to achieve effective section profile control over the full width of the strip, realize the coordinated control of edge drop and crown, and realize high-precision super-flat material control are common key issues that plague the research field of hot rolling technology. [0003] At present, there are mainly the following methods in the field of...

AI Technical Summary

Problems solved by technology

However, there is a large accuracy error in compensating the worn roll shape through the tapered roll, and it is difficult to realize the original design intention

At the same time, there is a large overall concavity in the hot-rolled work roll, which forms a curve form similar to the CVC roll shape in combination with the edge taper. The one-way roll shifting operation will cause continuous changes in the crown of the loaded roll gap, forming a Wave defects, the "CVC effect"

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