用统一强度理论的多层预应力组合凹模强度设计和应用  

Strength design of multi-layer pre-stressed combination die by unified strength theory

作　　者：敖文刚[1] 唐全波[1] 黄勇刚[1] 

机构地区：[1]重庆工商大学机械工程学院,重庆400067

出　　处：《塑性工程学报》2011年第6期31-35,共5页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(51105397);重庆市科技攻关计划资助项目(CSTC;2009AC3062)

摘　　要：运用统一强度理论,对用于加工废油资源化装备部件,以及由不同材料构成的3层预应力组合凹模的分层半径、过盈量和弹性极限内压进行分析,得到了组合凹模的分层半径、过盈量和弹性极限内压的表达式。运用该文所推导的公式对挺柱体冷挤压组合凹模在考虑和不考虑拉压异性的两种情况下,计算出组合凹模的分层半径、过盈量和弹性极限内压。结果表明,在考虑拉压异性情况下,组合凹模的分层半径、过盈量有较小差异,而弹性极限内压有较大提高。Applying unified strength theory,the three terms-radius of different layer,amount of interference and elastic limit internal pressure were analyzed for the three-layer pre-stressed combination die made of different materials used for processing waste oil recovery equipment.Formulas for calculating the three terms were derived and used for calculating a three-layer pre-stressed combination die with and without considering difference in tension-compression strength respectively.The results show that with and without considering difference in tension-compression stress,the radius of different layer differ a little bit and so are the amount of interference,but the elastic limit internal pressure differ remarkably.

关 键 词：多层组合凹模 SD效应 分层半径 过盈量 

分 类 号：TG375.4[金属学及工艺—金属压力加工]