普通4辊冷轧机辊型曲线设计新技术

New Technology in the Design of Roll-Shaped Curve for Regular Four-High Cold Rolling Mill

针对普通4辊冷轧机在生产过程中所遇到的复合浪、辊端压靠等问题,经过大量的现场实验与理论研究,充分考虑到4辊冷轧机的设备与工艺特点,并涵盖软硬、薄厚、宽窄等多种规格产品的生产需要,以轧机出口带材前张力横向分布最均匀为目标,同时考虑到硬、薄、窄料的压靠治理,并将辊间压力分布均匀作为约束条件,通过优化辊型曲线的特征参数,使得辊型曲线能够适应不同的板形情况,提出了一套以工作辊辊型曲线中的余弦分项与支撑辊边部的高次曲线分项治理边浪、工作辊型曲线中的高次曲线部分治理压靠、支撑辊中部的凹形余弦曲线分项减少中浪的组合辊型设计新方案,既可以治理复合浪形也可以治理单一浪形,还能减缓薄带轧制过程中的辊端压靠问题,保证产品板形质量的稳定,降低轧辊的磨损。

About the problem of complex wave,roller end forced-contract in the process of regular four-high cold rolling mill,after a number of field experiments and theoretical studies,and considering fully the equipment and the technical characteristics of four-high cold rolling mill,also covering the production needs of a variety of specifications,such as hardness,thickness,width and so on.With the objective of the most evenly to the lateral distribution of forward pull,taking into account the governance issues by pressure of different materials,and even distribution of pressure rollers as a constraint condition,by optimizing characteristic parameter of the roll-shaped curve for the different shape of strip situation.A new scheme to the combination roller design was put forward.The edge wave was removed by the cosine subitem of work roll-shaped curve and the higher degree curve subitem of the edge of backup roll.Forced-contract was removed by high-order part of the curve of work roll.The center wave was lessened by the subitem of the concave cosine curve.In that case,either complex wave or a single wave-shaped can be abated.In addition,it can alleviate the roll end forced-contract producing in the rolling process.And thus the shape quality of strip will be kept in a stable situation and the wear extent of roller will be reduced.