Influence of drawing process parameters on forming of micro copper tube with straight grooves

来源期刊:中国有色金属学报(英文版)2011年第10期

论文作者:汤勇 欧栋生 万珍平 陆龙生 练彬

文章页码:2264 - 2269

关键词:微沟槽;拉拔;拉拔参数;拉拔力;热管

Key words:micro-groove; drawing; drawing parameter; drawing force; heat pipe

摘    要:利用高速充液旋压技术加工出直径为6 mm的沟槽管;然后,采用多级拉拔成形方法加工出直径为3~6 mm的微型直齿沟槽铜管。在分析其加工成形机理的基础上,重点研究拉拔工艺参数对沟槽管成形的影响规律。结果表明:在微型直齿沟槽铜管成形过程中,随着拉拔成形直径的缩小,壁厚增加,槽深和槽宽均减小;同时,壁厚随着拉拔模具角的增加而减小,而槽深和槽宽随着拉拔模具角的增加而增加;随着拉拔级次压缩率的增大,拉拔力增大,过大的拉拔级次压缩率会导致微型直齿沟槽铜管拉拔成形轴向沟槽产生断裂。随着拉拔模具角的增大,拉拔力先减小后增大,并且存在一个最小值区域。当拉拔模具角α=16°时,拉拔力最小,此为最佳拉拔模具角。

Abstract: Using high-speed oil-filled spinning method, high quality micro copper tube with straight grooves (MCTSG) with an outer diameter of 6 mm was obtained. Then, MCTSG with an outer diameter of 3-6 mm was fabricated successfully by multi-pass drawing processing method. The influence of drawing parameters on the forming of micro straight grooves was investigated based on the forming mechanism. The results show that the values of groove depth and width decrease, while the wall thickness increases as the drawing diameter decreases. At the same time, the groove depth and width increase, while the wall thickness decreases as the die angle increases. The drawing force increases as the reduction increases. Excessive copper tube reduction may results in groove folding and segmental teeth. The drawing force decreases firstly and then increases with the increases in die angle. When the die angle α is 16°, the drawing force is the smallest, indicating 16° is the optimal angle.

有色金属在线官网  |   会议  |   在线投稿  |   购买纸书  |   科技图书馆

中南大学出版社 技术支持 版权声明   电话:0731-88830515 88830516   传真:0731-88710482   Email:administrator@cnnmol.com

互联网出版许可证:(署)网出证(京)字第342号   京ICP备17050991号-6      京公网安备11010802042557号