Analytical approach for compulsory broadsiding of continuous rough rolling process

Abstract

In this paper, in order to obtain the solution for using a handful of casting billets to produce a variety of specifications of products, a compulsory broadsiding method of continuous rough rolling process is used with four horizontal mills and two vertical mills. Due to nonplane deformation in grooves, partition method is used for the rolled piece, which is divided into five zones along the width direction. Mathematical model with five zones are proposed and the final width of plate are obtained by superposition method. In order to obtain the width spread coefficients of each zone as well as parameters optimizing, a numerical simulation method is used to calculate the rolling parameters of compulsory broadsiding of continuous rough rolling process. Computation result from mathematical model indicates that the exit width reaches its maximum value when the angle of chamfer reaches nearly 50°, and the trend of width increasing becomes slow when friction coefficient is larger than 0.4. Practical application shows that the present analytical model can be used to calculate the parameters in compulsory broadsiding rough rolling process easily and quickly, the maximum of width spread can reach 87 mm, and the deviation of the measured width could be controlled to be less than ±3 mm.