板材小圆角柔性成形机理  

Mechanism research on sheet flexible forming with small round corner

作　　者：郎利辉[1,2] 王耀[1] 张泉达 孙志莹[1] 张淳[3] LANG Lihui WANG Yao ZHANG Quanda SUN Zhiying ZHANG Chtm(School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China Collaborative Innovation Center of Advanced Aero-Engine, Beihang University, Beijing 100191, China Tianjin Tianduan Press Co. Ltd, Tianjin 301700, China)

机构地区：[1]北京航空航天大学机械工程及自动化学院,北京100191 [2]北京航空航天大学先进航空发动机协同创新中心,北京100191 [3]天津市天锻压力机有限公司,天津301700

出　　处：《中南大学学报（自然科学版）》2017年第9期2324-2330,共7页Journal of Central South University:Science and Technology

基　　金：国家科技重大专项(2014ZX04002041);国家自然科学基金资助项目(51175024)~~

摘　　要：针对带有局部小圆角特征的试件,提出一种2道次大圆角变小圆角的柔性成形方法。根据试件贴模过程中与模具相切位置的不同,首先分析第2道次成形过程中2种贴模方式的优劣,给出影响凸凹小圆角贴模过程的流料方式及直壁区的应力状态,并通过理论分析给出第1道次成形合适的凸凹圆角的计算公式。研究结果表明:贴模方式2更有利于小圆角的成形,是凸凹小圆角的较好成形方式。A new flexible forming method, which cnages the round corner radius from big values to small ones by two steps, was proposed for the specimen with local small round corner radius. Depending on different tangent positions between the specimen and the die, two kinds of forming modes in the second step were analyzed firstly. The material flow modes which had influence on the forming of small convex and concave round corner and the stress state of straight wall area were both presented. Meanwhile, the calculation formulas for the suitable convex and concave round corner in the first step were also given by theoretical analysis. The results show that forming mode 2 is more beneficial for the formation of small round corner and is a good method for the formation of small convex and concave round corner.

关 键 词：板材 局部特征 凸凹小圆角 贴模方式 柔性成形 

分 类 号：TG394[金属学及工艺—金属压力加工]