内台阶锥形环件辗扩锻件设计方法研究  

Research on design method of conical ring with inner steps for rolling process

作　　者：兰箭[1] 左治江[1] 韩星会[1] 赵玉民[1] 华林[1] 

机构地区：[1]武汉理工大学材料学院

出　　处：《塑性工程学报》2006年第2期51-56,共6页Journal of Plasticity Engineering

基　　金：国家自然科学基金重点项目(50335060);高校青年教师奖项目(教人司[2002]383号);塑性成形模拟及模具技术国家重点实验室开放基金(054)。

摘　　要：内台阶锥形环件是工业中的一种典型金属结构,相对于其它内锥形、外锥形和梯形环件而言,具有中部连续渐变、两端突变的特点。文章针对内台阶锥形环件的这一特点,首次提出了横截面变化率的定义,并将此定义用于内台阶锥形环件锻件设计,得出改进此类锻件轮廓的一般规律。对于给出的锻件及其改进方案,用弹塑性动力显式有限元方法进行辗扩塑性变形过程的模拟,证实了横截面变化率作为锻件改进的依据是可行的,所提出的锻件设计方法对于类似内台阶锥形环件辗扩工艺设计具有指导意义。The Conical Ring with Inner Steps （CRIS） is a typical metal structure in many industries. Compared to other rings with inner taper, outer taper and/or trapezoid section, the CRIS has a long middle section with uniform wall thickness and two sharp steps at two ends. To deal with these characteristics of CRIS, the definition of Cross Section Area Change Rate （CSACR） is firstly proposed and used to design the shape of CRIS. The general rule of the shape design of CRIS is outlined. The elasto-plastic dynamic explicit finite element method is employed to simulate the plastic deformation in the ring rolling process with initial ring section shape and its modifications. The numeric results have confirmed the validity of the CSACR as a criterion of improving the shape of CRIS. The proposed design method can give good guidance for the rolling process design of CRIS.

关 键 词：环件辗扩 塑性变形 有限元方法 面积变化率 

分 类 号：TG316.13[金属学及工艺—金属压力加工]