摘要
针对扳手状梁类件完成收口翻边后模具无法实现脱模,且对向翻孔同轴度难以保证等问题,提出一种扳手状梁类件整体冲压成形的方法。首先,通过对传统凸模结构进行改进,取消收口翻边凸模的支撑结构,利用凸模圆角限位和板料的随形流动实现收口翻边,保证凸、凹模能够顺利脱模;其次,通过前工序的预翻孔和后工序的整翻孔保证对向翻孔的同轴度;此外,利用Dynaform对该种梁类件进行全工序分析;最后,以试制的方式对所提及的方法进行验证,结果表明:取消收口翻边凸模的部分支撑结构可以实现凸、凹模的顺利脱模;且通过预翻孔和整形来提高翻孔的同轴度。使对向翻孔的同轴度可以达到Φ0.3 mm。
For the problems that after the wrench-shaped beam part was closed and flanged,the mold cannot be demolded,and the coaxiality of opposite flanging hole was difficult to guarantee,a method of integral stamping for the wrench-shaped beam parts was proposed.Firstly,the traditional punch structure was improved,the supporting structure of the closed flanging punch was cancelled,and according to conformal flow of sheet metal and limit of fillet for punch,the closed flanging was realized to ensure the punch and die to demold smoothly.Secondly,the coaxiality of opposite flanging hole was guaranteed by the pre-flanging hole of the former process and the rectify flanging hole of the latter process.Furthermore,the integral forming process of this kind of beam parts was analyzed by Dynaform.Finally,the mentioned method was verified by trial production.The results show that the smooth demolding of punch and die is achieved by eliminating part of the supporting structure for closed flanging,and the coaxiality of flanging hole is improved up to Φ0.3 mm by pre-flanging hole and shaping.
作者
孙丽
周海龙
黄冠鑫
张亚岐
刘俊锋
戴维
Sun Li;Zhou Hailong;Huang Guanxin;Zhang Yaqi;Liu Junfeng;Dai Wei(Department of Vehicle Engineering,Baotou Vocational and Technical College,Baotou 014030,China;Technology Center,Dongfeng Motor Corporation,Wuhan 430058,China)
出处
《锻压技术》
CAS
CSCD
北大核心
2020年第9期69-74,共6页
Forging & Stamping Technology
基金
国家自然科学基金资助项目(61374196,51178053)
教育部长江学者和创新团队发展计划项目(IRT1286)。
关键词
扳手状梁类件
冲压成形
收口翻边
脱模
对向翻孔
同轴度
wrench-shaped beam parts
stamping
closed flanging
demolded
opposite flanging hole
coaxiality