辗环过程动力有限元分析中的抱辊约束

The restraining from guide rollers in dynamic explicit FEM of ring rolling

在辗环过程中，抱辊起着稳定轧制过程，使环件中心始终保持在主辊与压力辊的中心连线上，并起到矫正环件不圆度的作用。本文采用动力有限元分析方法模拟辗环过程，提出了抱辊约束的施加方法，推导了用惩罚法施加抱辊约束的详细公式，对比了有抱辊约束和无抱辊约束的有限元计算结果。

Guide rollers play the important roles in ring rolling.They ensure the rolling processing steady and force the central of the ring being rolled move on the line through the circle central of main roller and press roller.A new method of analyzing the restraining from guide rollers in dynamic explicit FEM of ring rolling is presented.The penalty forces are applied to the ring while its FE nodes penetrate the surface of guide roller.And the formulations in detail are given.At last two examples are illustrated,and one is with the restraining method,contrary is another.