弹壳形状零件缩口力描述模型研究  

A descriptive model study on necking deformation pressure for a kind of cartridge

作　　者：卢险峰[1] 褚亮[1] 

机构地区：[1]南昌大学,南昌330029

出　　处：《塑性工程学报》2004年第6期43-46,共4页Journal of Plasticity Engineering

摘　　要：基于对冲压成形加工中缩口工序变形区材料的变形力学特点的分析 ,考虑现有分析计算中被忽略的材料厚度变化及加工硬化两个因素的影响 ,利用金属塑性成形理论中的主应力法 ,提出了描述缩口成形力的一个新的数学模型 ,即P =f (n、k、mn、t、α、μ) (其中t=f1(t0 、r0 、r) ) ,及其具体表达式 。According to analyse the stress and strain character of necking deformation range,and on the basis of considering the influencing factors, including the variety of material thickness and material work-hardening, which were omitted in the existent analysis and calculation,a descriptive model and it's detailed expression P=f(n、k、m n、t、α、μ),(t=f 1(t 0、r 0、r )) ,applied to calculate necking pressure is set up by utilize slab method from metal plastic forming theory. And descriptive model is validated by the experiment.

关 键 词：缩口力 加工硬化 料厚变化 主应力法 描述模型 

分 类 号：TG356.23[金属学及工艺—金属压力加工]