冷挤压组合模具的ANSYS应力分析

针对传统冷挤压应力设计方法存在计算复杂、应力体现不直观等不足,根据弹性力学基本方程,利用ANSYS有限元软件,分析组合模具中挤压筒内衬和外衬动静态过盈配合时的应力分布。结果显示：在内衬压入外衬过程中,应力呈由小到大的非线性变化;组合模具最大配合应力集中在内衬内表面和接触面,为1350MPa,未超出材料的许用应力,未使产品产生塑性变形。该方法可快捷、准确地找出组合模具过盈配合的最大应力,直观观察应力变化,为该类模具的设计和优化提供了更为方便、有效的数值计算方法。

ANSYS stress analysis of cold-flow pressing combination die

In response to computational complexity and the non-intuitive stress affecting the traditional design of cold-flow pressing,this paper presents an analysis of the stress distribution of dynamic and static tight fit of the lining and outer lining of extrusion cylinder in combination die by using the ANSYS finite element software and according to the basic equations of elastomechanics.The results show that pressing liner into the outer lining gives rise to the stress with non-linear changes from the small to the large.The combination die has the maximum coordination stress in the range of 1 350 MPa,concentrated in the internal surface and contact surface of lining,without exceeding the allowable range of materials stress nor resulting in plastic deformation in the products.This method allows for a quick and accurate identification of the maximum stress of tight fit in combination die and intuitive observation of stress changes and serves as the convenient and effective numerical method for this mold design and optimization.