Correlation and Engineering Study of Wide Spread Factors on Material of Wire Rod Rolling

Abstract

Roll force and filling rate are essential for wire rod rolling. Width Spread is very important on wire rod rolling because roll force and filling rate are determined by width spread. And, because cross-section area of material is circle shape, wire rod rolling has groove, unlike plate rolling. Width spread is affected by groove. We should know the factors that affect width spread in groove. Also, we need to know correlation of width spread and factors. This study confirmed factors to affect width spread and measured width spread through FEM. Through measured result, I reviewed the correlation with width spread and factors. This study compared and analyzed between theoretical width spread value and measured width spread value. Also, as the width spread change, I confirmed effectiveness of rolling force and filling rate. Existing theoretical formula of width spread was only reflected geometrical part of material and groove. There is difference between theoretical width spread value and actual width spread value that included property of material and rolling conditions. Threrfore, rolling force and filling rate are difference between theoretical value and actual value because there are influenced from width spread. To reflect accurate width spread, this paper suggested correction factor to existing theoretical formula of width spread. This correction factor is calculated through difference of theoretical value and FEM analysis value. This corrected formula could be help for accurate prediction of width spread at design work.