不同摩擦条件下的斜轧穿孔过程有限元分析

FE Analysis on Cross Piercing Process in Different Friction Condition

以曼内斯曼穿孔机为研究对象,利用MSC.Superform 2005有限元软件对直径100mm的33Mn2V钢实心坯斜轧穿孔过程进行三维热力耦合数值模拟,并对不同摩擦系数条件下管坯运动状态以及应力、应变分布进行了分析.研究表明:摩擦系数对塑性应变、摩擦力、切应力以及轧制力的影响不大.1255℃的高温条件下摩擦系数增加并不影响整个系统,而在摩擦系数为0.2时塑性应变率最大,轧件表面温度最低.合理的摩擦系数在0.1～0.2之间.

Based on Mannesmann piercing mill, a finite element model of 33Mn 2V Solid billet which diameter is 100mm was established by MSC.Superform 2005 software to make a 3D thermal-mechanical coupling simulation of the piercing process. The motion state, stress distribution and strain distribution of the tube billet in different friction coefficient have been analyzed. The research confirmed that the plastic strain, friction force, shear stress and roll force are almost not effected in different friction coefficient. In a higher as 1255~C temperature condition, the mill system is not influenced when improve the coefficient of friction. The largest plastic strain rate and lowest billet surface temperature are achieved when the coefficient of friction is 0.2. The results shows that the reasonable coefficient of friction is between 0.1 to 0.2.