摩擦因数对轴对称零件冷挤压过程的影响（英文）

Effects of the friction coefficient on cold extrusion process of axial symmetry parts

冷挤压件强度高、刚性好、生产率高,在装备制造业和液压系统中得到了广泛的应用。利用ANSYS软件对轴对称零件冷挤压过程进行了分析,得到了不同摩擦因数下的轴向、径向和周向应力图,对挤压应力的模拟数值进行了分析和拟合,利用最小二乘法对函数进行了逼近。结果表明:轴向拉伸应力,径向拉伸应力和圆周拉伸应力值分布在一条直线上,值随摩擦因数的增加而增加,轴向压应力、径向压应力和圆周压应力近似分布在二次曲线上,对生产具有重要的理论指导意义。

The cold extrusion has a high strength and a good rigidity.It has been widely used in the equipment manufacturing and hydraulic systems.The cold extrusion process of axisymmetric parts were analyzed using ANSYS software.The axial,radial and circumferential stress maps of different friction coefficients are obtained.The simulation results of the compressive stress are fitted and analyzed,and the function is approximated by the least squares method.The results show that the values of axial tensile stress,radial tensile stress and circumferential tensile stress are distributed in a straight line,and the value increases with the increase of friction coefficient.Axial compressive stress,radial compressive stress and circumferential compressive stress are approximately distributed on a quadratic curve.It has an important theoretical significance for production.