摘要
以0.8 mm厚的纯铜为研究对象,进行了超声焊接接头试验分析,研究了焊接压力对焊接过程及接头强度的影响规律.界面间运动传递力学分析表明,焊接压力通过界面粘—滑运动影响界面的能量输入,进而影响焊接接头的成形过程.结果表明,焊接压力直接影响压电换能器的功率输出,从而影响输入焊接界面的能量,致使焊接区域的变形程度不同;焊接压力存在临界值,低于临界值时,焊接接头拉伸剪切力随焊接压力增大而增大,但强度较低;高于临界值时,随着焊接压力的增大,焊接接头拉伸剪切力基本保持不变.
The copper sheets with 0.8 mm in thickness were successfully welded by high power ultrasonic welding(USW).The effect of welding pressure on the interfacial behavior of the joints was investigated.The analyses of the transfer kinematics between interfaces show that the energy input of the interface is mainly decided by the viscous-slip motion occurring between the weld coupons.The output power of the piezoelectric transducer is significantly influenced by the welding pressure,which determines the welding energy inputted the welding interface.It is concluded that there is a critical value of welding pressure in USW.When the welding pressure is lower than the critical value,the joint strength is low and increased with the increase of welding pressure.When the welding pressure is higher than the critical value,the joint strength is almost invariable.
作者
杨景卫
曹彪
柳健
卢清华
YANG Jingwei;CAO Biao;LIU Jian;LU Qinghua(School of Mechatronics Engineering,Foshan University,Foshan 528000,China;School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510640,China)
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2018年第2期53-56,131,共5页
Transactions of The China Welding Institution
基金
国家自然科学基金资助项目(51175184)
广东省自然科学基金项目(2014A030313616
2015A030310181)
广东省科技计划项目(2015B010101015)
关键词
超声焊接
焊接压力
动力学分析
铜
ultrasonic welding
welding force
kinematic analysis
copper
