不同冷成形加工工况下钛合金板材的初始回弹  

Analysis of Initial Resilience for Ti-Alloy Sheet under Different Cold-Forming Cases

作　　者：刘垒 杨志恒 宋波 范正伟[2] 刘金玉[2] 姜建华[2] 

机构地区：[1]上海飞机制造有限公司,上海200436 [2]同济大学航空航天与力学学院,上海200092

出　　处：《力学季刊》2014年第1期105-114,共10页Chinese Quarterly of Mechanics

基　　金：2011年度上海市第一批高新技术产业化重点项目(沪经信技2011-819);飞机复杂钛合金钣金件精确成形技术开发研究(上飞SAM C12-75-13-038)

摘　　要：钛合金板材是一种高模量弹塑性材料,在冷成形加工的过程中,回弹控制难度较大.金属板材的冷成形加工过程,实际涵盖了多种冷成形加工工况.就板材冷成形加工过程中遇到的各种工况进行梳理分析,归纳为若干典型的工况,针对不同的冷成形加工工艺所含盖的典型工况,对高模量弹塑性板材在冷成形加工脱模后的初始回弹问题,进行了精细的分析,并提出了高精度的解析解.从而,在理论上为诸如钛合金之类的高模量弹塑性板材的冷成形加工,冷成形模具设计,及其冷成形加工工艺的工序优化,提供参考依据.Ti-alloy sheet is a high-modulus elastic-plastic material, about which the resilience in the cold-forming process is quite difficult to control. As a mater of fact, the procedure of cold-forming is composed of many cases such as tensile case and bending case. By classifying the cold-forming process, some typical cases of cold-forming were presented in this paper, and analytical solutions with a high precision of initial resilience for high-modulus elastic-plastic material such as Ti-Alloy Sheet under the different typical cases were obtained. The accurate analytical solutions of initial resilience for high-modulus elastic-plastic material presented in this paper will contribute to cold-forming process both in the mould-designing and optimizing of cold-forming procedure.

关 键 词：冷成形加工 初始回弹分析 工序优化 钛合金板材 两参数弹塑性本构模型 

分 类 号：TQ320.66[化学工程—合成树脂塑料工业] O344.3[理学—固体力学]