超声耦合直流MIG焊叠加波形分析  

Analysis of superposition waveform for the ultrasonic coupled DC MIG welding

作　　者：陈琪昊 孙亚龙[1] 王佳辉 林三宝 王加友[1] Chen Qihao;Sun Yalong;Wang Jiahui;Lin Sanbao;Wang Jiayou(Jiangsu University of Science and Technology,Zhenjiang 212003,Jiangsu,China;State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology,Harbin 150001,Heilongjiang,China)

机构地区：[1]江苏科技大学,江苏镇江212003 [2]哈尔滨工业大学,先进焊接与连接国家重点实验室,黑龙江哈尔滨150001

出　　处：《机械制造文摘（焊接分册）》2021年第3期8-12,共5页Welding Digest of Machinery Manufacturing

基　　金：国家自然科学基金资助项目(51905230);先进焊接与连接国家重点实验室开放课题研究基金资助项目(AWJ-20-MO6)。

摘　　要：电弧超声复合焊接方法具有一定的应用优势,利用超声电源与焊接电源之间的电叠加可将超声引入焊接过程。文中利用电容和电阻串联将超声脉冲信号和直流MIG焊信号进行叠加,利用电路仿真软件对不同器件参数下的叠加波形进行仿真分析。结果表明,电阻和电容通过改变叠加波形的形状进而影响超声激励强度及焊接热输入,其中电阻变化仅影响超声激励强度,电容变化同时影响超声激励强度及焊接热输入。超声激励强度较强同时焊接热输入较小的叠加波形为最佳波形,文中提出了获得最佳叠加波形的条件。Arc ultrasonic composite welding method has certain application advantages.The ultrasonic energy could be introduced into the welding process by the coupling of ultrasonic power and welding power.In this paper,the ultrasonic pulse signal and DC MIG welding signal were coupled by the connection of capacitor and resistor in series,and the superposition waveform under different device parameters was imitated and analyzed by circuit simulation software.The results showed that the resistance and capacitance would affect the ultrasonic excitation intensity and welding heat input by changing the shape of the superposition waveform.The change of resistance would affect the ultrasonic excitation intensity,and the change of capacitance affected the ultrasonic excitation intensity and heat input simultaneously.The coupling waveform with higher ultrasonic excitation intensity and small welding heat input was the best superposition waveform.The conditions for obtaining the best superposition waveform were presented.

关 键 词：铝合金 MIG焊 超声频脉冲 叠加波形 

分 类 号：TG432[金属学及工艺—焊接]