
第43卷第1期 Vol. 43No.1
假压技木
FORGING & STAMPING TECHNOLOGY
2018年1月 Jan.2018
基于CATIA的弯边零件橡皮囊液压成形下陷区回弹补偿及验证
张凌云,陈瑶,孟伟琪,范作鹏”
(1.沈阳航空航天大学航空制造工艺数字化国防重点学科实验室,辽宁沈阳110136:
,中航工业沈阳飞机工业(集团)有限责任公司,辽宁沈阳110034) 2.
摘要:针对弯边零件橡皮囊液压成形过程中普通存在的回弹现象,运用PAM-STAMP2G有限元分析软件对带下陷弯边零件进行模拟,发现下陷特征两侧的回弹值明显小于其他位置的回弹值,下陷特征限制了回弹的发生。利用解析法得到理论回弹公式,使用曲线法平面截取补偿算法和下陷区型面补偿方法解决了下陷区的型面补偿间题。在CATIA交互模式环境下完成了对
对比橡皮囊液压成形试验结果。发现零件回弹前后的角度偏差
回弹补偿系统的开发,对补偿后的模具进行有限元数值模拟,
关键词:橡皮囊液压成形:弯边零件:回弹补偿;下陷区;CATIA DOI: 10. 13330/j. issn. 1000-3940. 2018. 01. 015
文献标识码:A
中图分类号:TG386
文章编号:1000-3940(2018)01-0083-07
Springback compensation and verification on joggle in rubber hydraulic
forming for flanging part based on CATIA Zhang Lingyun', Chen Yao', Meng Weiqi', Fan Zuopeng
( 1. Key Lab of Fundamental Science for National Defense of Aeronautical Digital Manufacturing Process, Shenyang Aerospace University,
Shenyang 110136, China; 2. AVIC Shenyang Aireraft Industrial (Group) Co. , Lad. , Shenyang 110034, China)
Abstract : Aiming at the springhack phenomenon commonly occurred in the process of rubber hydraulic forming for flanging part, the flan ging part with joggle was simulated by finite element analysis sofiware PAM-STAMP2G, and the springhack values on both sides of joggle were obriously smaller than that at other positions, the joggle characteristic limited the possibility of springback. Then, a theoretical spri-nghack fommula was obtained by analytic method, and the pnoblem of surface compensation on joggle was solved by the curve normal plane uaduoa gaequuds aq go uowdoaaap aq *aaouaquny ~aasof p poqiau uogesuaduoa aorgns aq pue unqiuo8e uogrsuaduoo dasagul sation system was completed under CATIA interaction mode, the compensated die was simulated by finite element method, and the results were compared to the rubber hydraulic foming test. The results show that the angle deviation before and after springhack of part is within 1°, which verifies that the springback compensation system has a good compensation effect on the flanging part with joggle and saves a lot of costs to modify die.
Key words : rubber hydraulic forming; flanging part; springhack compensation; joggle; CATIA
橡皮囊液压成形是利用橡皮半模向刚性半模包覆或流动完成零件的制造,可以同时成形多种复杂的零件,减少模具数量,提高贴模精度,并改善零件表面质量1-2)。橡皮囊液压成形零件可以分为很多类别,其中最广泛的就是弯边成形,包括凸弯边、凹弯边和直弯边。弯边零件作为典型的飞机钣金零
收稿日期:20170714;修订日期:20170929
作者筒介:张凌云(1963-),男,博士,教授,额士生导师 E-mail: zhangly79@ 163. com
通讯作者:陈瑶(1992-),男,颈士研究生万方数据il:459311221@q-com
件具有种类多、产量少的特点,橡皮囊液压成形工艺刚好满足弯边零件的成形特点。
弯边零件成形中普遍存在回弹、
起皱和破裂三
大质量问题,其中回弹现象最难控制[3-5]。目前,回弹控制的方法主要有两种:一种是通过控制对回弹影响较大的成形工艺参数来控制回弹量;另一种是模具补偿法,即通过对模具型面进行预修正,使得回弹后的形状与设计模具相同[6-9]
20世纪80年代后期,有限元理论日益成熟,计算机技术迅猛发展,利用有限元数值模拟方法已经解决了很多有关回弹方面的问题。李奇涵等]通过Dynaform对汽车顶盖冲压成形回弹进行数值模
特种成形栏目是由北京机电研究所有限公司①费助刊出