H型钢万能轧制力计算方法

Calculation method for universal rolling force of H-beam

基于分离腹板和翼缘相互影响的思路建立2种特殊的H型钢万能轧制模型。通过研究不同延伸比和面积比条件下水平辊、立辊轧制力与平板轧制的关系,总结归纳出H型钢万能轧制力计算公式,并用其他规格道次的H型钢轧制力进行对比验证。研究结果表明:在相同的面积比条件下,随着腿腰延伸比λ的增大,水平辊轧制力减小,立辊轧制力增加;随着翼缘或者腹板面积的减小,不同延伸比情况下的水平辊中间位置轧制力和立辊轧制力分别收敛于1个稳定值;该H型钢轧制力计算公式能较好地反映不同工艺参数下轧制力的变化趋势;水平辊轧制力公式计算结果与有限元模型计算结果的最大相对误差为16.7%,与实测值的相对误差为3.4%;立辊轧制力公式计算结果与有限元模型计算结果的最大相对误差为8.7%,与实测值的相对误差为4.4%。

Two models of universal rolling were built with intention to get rid of influence of web and flange. The calculation formulas of H-beam＇s rolling force were derived based on the research of differences and relationship between H-beam＇s and fiat＇s rolling forces. Then, the calculation formulas were verified by rolling forces of other sizes and passes. The results show that force of horizontal roll decreases with the increase of ratio of elongation as well as the force of vertical roll increases in the same area ratio. Rolling force of the middle position of horizontal roller converges to a stable value with the reducing of flange＇s area. Vertical rolling force converges to a stable value with the decrease of web＇s area. The changing trend of rolling force in different process parameters was expressed well by calculation formulas. The maximum relative error between the rolling force formula of horizontal roll and finite element results is 16.7%. The average relative error between the formula and test values is 3.4%. The maximum error between the rolling force formula of vertical roll and finite element results is 8.7%. The average relative error between the formula and test value is 4.4%.