基于ABAQUS的多层铜铝超声金属焊接过程

Ultrasonic metal welding process of multilayer copper aluminum based on ABAQUS

针对叠片工艺软包电池极耳采用多层同种金属与单层异种金属超声焊接的过程,使用Abaqus/Explicit软件结合实际焊头振动数据,并考虑多层界面的摩擦系数变化规律,建立了二维多层铜铝超声波焊接有限元分析模型,分析超声波多层铜铝金属焊接行为。并与红外摄像仪测量的焊接温度和焊接界面截面金相对比。结果表明多层铜铝进行超声波焊接时,摩擦热与塑性变形热为超声波焊接过程中主要的热量来源,焊接塑性形变在达到一定状态会剧烈增加,多层铜铝异种金属焊接时,塑性形变主要发生与铜片接触的铝片,模拟结果与试验结果吻合较好,对叠片工艺软包电池的极耳焊接试验具有一定的指导意义。

Aiming at the process of ultrasonic welding of multi-layer same metal and single-layer dissimilar metal for the electrode lug of laminated soft package battery,ABAQUS software was used and combined with the actual welding head vibration data,as well as considering the variation law of friction coefficient of multi-layer interface,to establish a two-dimensional finite element analysis model of multi-layer copper aluminum ultrasonic welding,and the ultrasonic multi-layer copper aluminum metal welding behavior was analyzed.The results were compared with the welding temperature measured by infrared camera and the metallography of welding interface section.The results showed that friction heat and plastic deformation heat were the main heat sources in the ultrasonic welding process of multilayer copper and aluminum,and the welding plastic deformation would increase sharply when reaching a certain state.When multilayer copper and aluminum dissimilar metals were welded,the plastic deformation mainly occurred in the aluminum sheet in contact with the copper sheet.The simulation results were in good agreement with the experimental results,which had certain guiding significance for the electrode lug welding experiment of laminated soft pack battery.