
第42卷第3期 Vol. 42Na.3
假压技本
FORGING & STAMPING TECHNOLOGY
2017年3月 Mar.2017
工艺参数对薄壁铜管游动芯头振动拉拔过程拉拔力影响分析
许永强,姜志宏,胡沛,曾艳祥,李旭
(江西理工大学机电工程学院,江西赣州341000)
摘要:在金属塑性成形中加人振动,可以有效降低材料变形抗力并提高产品质量。以薄壁铜管游动芯头拉拔为研究对象,分析了振动对铜管拉拨过程中拉拨力的影响,并通过有限元分析软件MARC,对不同的工艺参数(拉拨速度、外模模角和芯头锥角)进行数值模拟。研究结果表明:针对本模型,存在一个最佳外模半锥角和芯头锥角组合(外模半锥角α为12°,芯头锥角β为9°),使得薄壁铜管游动芯头振动拉拔过程中的拉拨力最小,面拉拨速度对拉拨力的影响较小。
关键词:薄壁铜管;游动芯头振动拉拔;拉拔力;数值模拟;振动 DOI; 10, 13330/j, issn. 1000-3940. 2017. 03, 014
中图分类号:TG394
文献标识码:A
文章编号:1000-3940(2017)03-0069-04
Influence of processparameters ondrawingforceinthefloatingplug
vibrationdrawingprocessofthin-walledcoppertube
Xu Yongqiang,Jiang Zhihong,Hu Pei,Zeng Yanxiang,Li Xu
(School of Mechanical and Electrical Engineering, Jiangxi Univensity of Seience and Technology, Ganzhou 341000, China)
Abstract : The vibration adding in metal plastic forming can effectively reduce the deformation resistance of material and improve the qual-ity of products. Thus, for the thin-wall copper tube floating plug drawing, the influence of vibration on the drawing force of copper tube in the drawing process was analyzed, and different process parameters (drawing speed, extemal mold angle and cone angle) were simulated by the finite element analysis software MARC. The result shows that based on this model, the best parameter combination with the half cone angle of external die of 12°and the plug cone angle of 9°exists. Thus, the drawing force in the floating plug vibration drawing process of thin-walled copper tube is the minimum, and the inluence of drawing speed on the drawing force is smaller.
Key words: thin walled copper tube; vibration drawing of floating plug; drawing force; numerical simulation; vibration
游动芯头拉拔是靠芯头外形本身建立起来的力收稿日期:2016-1009;修订日期:20161230
基全项目:国家自然科学基金资助项目(50665003,51464017)
作者简介:许永强(1992-),男,硕士研究生 E-mail;1162299134@qq:com
通讯作者:姜志宏(1977-),男,硕士,副教授 E-mall: jzheemail@gmail.com
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平衡而稳定在模孔中,从而实现减径减壁的拉拔方法[1]。在拉拔过程中添加振动,不仅可以提高表面质量,还可以减小材料成形力(2-4)。关于拉拔过程中拉拨力的研究,谢涛等在拉丝过程中添加超声振动,相比普通拉拔,拉拨力明显减小[3]。藏勇等对薄壁铜管游动芯头拉拔过程拉拔力影响因素进行了分析,但未考虑在拉拔过程中振动的影响["}。本文针对薄壁铜管游动芯头振动拉拔进行研究,借助
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