Roll shape of driven roll of second intermediate roll of Sendzimir mill

Abstract

The invention discloses a roller shape of a driven roller of a second intermediate roller of a sendzimir mill, the roller shape of the driven roller (5) of the second intermediate roller is a parabola, an elliptic curve or a quartic curve, the axis of the driven roller is used as an x axis, the radial direction of the driven roller is used as a y axis, and the vertex of the end part of a roller body of the driven roller is used as an original point; the convexity curve equation of the parabola roll shape is y = delta-delta (2x / L-1) 2, the convexity curve equation of the elliptic curve roll shape is the convexity curve equation of the quartic curve roll shape is y = delta-delta (2x / L-1) 4, the middle convexity is 2 delta, the roll surface length is L, and the value range of x is 0-L. According to the method, the roll shape is optimized into a parabola, an elliptical line or a quartic curve from an existing common arc curve, the contact stress between the Sendzimir roll system rolls can be further reduced, the convexity keeping performance of the driven roll is improved, the strip shape control capacity of a rolling mill on strip steel is enhanced, the service life of the second intermediate roll is prolonged, and the production cost of silicon steel is reduced.

Description

technical field [0001] The invention relates to a roll system for a Sendzimir rolling mill, in particular to a driven roll shape of the second intermediate roll of the Sendzimir rolling mill. Background technique [0002] The twenty-high Sendzimir mill is mainly composed of work rolls 2, first intermediate rolls 3, second intermediate rolls, backing bearing rolls 6 and other rolls. Please refer to the appendix. figure 1 (attached figure 1 Only 10 rolls of the upper half of the roll train of strip 1 are shown). Among them, the second intermediate roll includes driving rolls 4 on both sides and a driven roll 5 (idler roll) in the middle. In the entire roll system, the driving roll 4 mainly plays the role of driving the rolling mill to work stably. Please see attached figure 2 , the transmission roller 4 of the prior art is a straight roller, and the driven roller 5 is a circular arc convex roller of 200 μm on both sides. The roll shape curve equation of the driven roll 5 ...

AI Technical Summary

Problems solved by technology

[0004] (1) The wear resistance is relatively insufficient, and the use time of the second intermediate roll is generally only about 2 weeks. Frequent roll changes make the production organization very complicated, which greatly increases the use cost of the roll

[0005] (2) The crown retention ability of the driven roll 5 of the second intermediate roll is not enough. As the wear crown decreases, it will affect the shape control of the silicon strip in the later stage.

[0008] However, from the point of view of the contact stress of the intermediate roll, this multi-stage, multiple intermediate roll shape of the prior art, especially the intermediate roll adopts a multi-stage roll shape and is used with other surrounding work rolls (the first intermediate roll 3) , Backing roll (backing bearing roll 6) matching, it is unavoidable that there are problems such as large local contact stress on the roll surface, many stress concentration points, and complicated manufacturing process at the joint of the multi-section roll shape curve. These problems are now With the first intermediate roll 3, the backing bearing roll 6 also tends to be more prominent under the background of constantly emphasizing the role of roll shape (chamfering)

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