网站首页期刊简介编委会过刊目录投稿指南广告合作征订与发行联系我们English
挤压缩口工艺中缺陷的研究
英文标题:Study on defect in extrusion necking
作者:郭永强 徐春国 任广升 周林 任伟伟 
单位:北京机电研究所 
关键词:挤压 缩口 缺陷 
分类号:TG335
出版年,卷(期):页码:2011,36(2):144-147
摘要:

针对钻杆接头挤压缩口成形过程中产生连皮四周出现缺肉及折叠缺陷的现象,采用三维有限元模拟软件Derform-3D,对整个缩口过程及成形影响因素进行了模拟分析,发现缺陷的产生主要是由反挤压与缩口同时进行时成形件底部金属复杂流动引起的。通过对冲头形状、凹模型腔及摩擦系数等成形影响因素分析,确定出缩短冲头长度、适当增大冲头直径、凹模变锥角并底部加台、减小摩擦系数等解决措施,并通过实验得到合格的产品。

Aiming at the defect of enfold and the shortage of material around web in the forming process of necking for drill pipe joint, the finite element software Derorm-3D was employed to simulate the whole process and the shape factors of necking. The results show that the defect is mainly caused by complex metal flow at the bottom of formed parts when backward extrusion and necking at the same time. Through the analysis of forming factors including punch shape, matrix cavity and friction coefficient,the solutions were determined, such as shortening the length of the punch, increasing the punch diameter, changing cone angle of the concave die, increasing the table at the bottom of concave die and reducing the friction coefficient . Finally, the qualified workpiece is produced.

基金项目:
国家自然科学基金资助项目(51075024,50675014)
作者简介:
参考文献:


[1]任广升,白志斌.复合挤压变形的模拟研究[J]. 中国机械工程,1994.30(1):56-62.
[2]郭永强,徐春国,任广升,等.石油钻杆接头复合挤压缩口的数值模拟及实验研究[A].第十一届全国塑性工程学会[C].长沙:全国塑性工程学会,2009.
[3]范建文,吴诗淳,李淼泉.外径不等杯一杯型复合挤压过程的数值模拟[J].机械科学与技术,1998,1(17):91-93.
[4]刘化民,白志斌,梁继才.复合挤压变形规律的研究[J].中国机械工程,1999,10(12):1398-1400.
[5]任广升,胡亚民,付传锋. 模具型腔挤压成型技术[M].北京: 机械工业出版社,2009.
[6]Srinivasan K,Venugopal P. Formability limit in container less (Open Die) extrusion of commercial purity titanium rods and tubes[J]. Materials and Manufacturing Process,2008,23:347-351.
[7]中国机械工程学会锻压学会. 锻压手册:第一卷[M]. 北京:机械工业出版社,1993.

服务与反馈:
文章下载】【加入收藏
《锻压技术》编辑部版权所有

中国机械工业联合会主管  中国机械总院集团北京机电研究所有限公司 中国机械工程学会主办
联系地址:北京市海淀区学清路18号 邮编:100083
电话:+86-010-82415085 传真:+86-010-62920652
E-mail: fst@263.net(稿件) dyjsjournal@163.com(广告)
京ICP备07007000号-9