Crossing angle and roll bending force reduction based roll shape design method of work roll of PC rolling mill

Abstract

The invention provides a crossing angle and roll bending force reduction based roll shape design method of a work roll of a PC rolling mill, aiming at the rolling characteristics of the PC rolling mill. The roll shape design method comprises the following steps of: (a) collecting equipment parameters and process parameters of the PC rolling mill; (b) collecting rolling process parameters of typical band steel; (c) setting a curve equation of the work roll; (d) optimally computing curve parameters of a roll shape; and (e) substituting the curve parameters of the roll shape into the roll shape curve equation of the work roll so as to obtain an optimized roll shape curve equation of the work roll. The invention enhances the stability of the PC rolling mill because a roll shape curve of the work roll reduces the crossing angle and the roll bending force, prolongs the service life of the work roll, enhances the convexity control capacity of the PC rolling mill, not only ensures the qualityrequirement of a profile shape, but also meets the requirement for industrial application precision, and can also be used for the roll shape curve design of the work roll of any rack according to actual field situation.

Description

technical field [0001] The invention relates to a PC rolling mill design technology, in particular to a PC rolling mill work roll profile design method based on reducing intersection angle and roll bending force. Background technique [0002] In industrial production, PC rolling mill has been widely used and promoted in the field of hot-rolled and cold-rolled strip steel due to its outstanding flatness control capability. The characteristic of the PC rolling mill is that the upper and lower rolls cross in pairs. It is precisely because of the crossing between the rolls that a large axial force will be generated during the rolling process. As the crossing angle increases, the axial force will increase accordingly. It makes the design requirements of the rolling mill system more complicated. In the case of high-speed rolling, the stability of the PC rolling mill is lower than that of the ordinary four-high rolling mill due to the existence of the cross angle, which limits the...

AI Technical Summary

Problems solved by technology

In the case of high-speed rolling, the stability of the PC rolling mill is lower than that of the ordinary four-high rolling mill due to the existence of the cross angle, which limits the quality of the strip product and the rolling production efficiency

In addition, due to the existence of roll bending force, the wear of the work roll surface will be accelerated, the service life of the work roll and its bearing seat will be reduced, the roll changing cycle will be shortened, and the workload and cost of equipment operation and maintenance will be increased.

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