Al3003铝合金激光脉冲焊温度场数值模拟

Numerical simulation of pulsed laser welding temperature field for Al3003 aluminum alloy

采用有限元法对超级电容器壳体焊接结构在激光脉冲焊接时的温度场演变规律进行模拟计算.在实际构件上截取各条焊缝试样进行宏观观察,确定焊缝的几何参数.在热扩散仪上对材料的热导率和比热容进行测试,获得有限元计算所需的准确的材料热物理参数.在材料试验机上对材料进行高温拉伸试验,通过多个温度点的应力应变曲线判断材料的熔点温度.结果表明,脉冲激光焊接能量集中,不会造成整个构件的整体温升,在整个焊接过程中电芯及橡胶元器件均不会发生损坏.

The pulsed laser welding temperature field for supercapacitor shell structure was analyzed by FEM. The welding heat model parameterswere defined based on the macrostructure of the welded joint taken from the real component. The thermalconductivity andspecific heat were tested to obtain the thermodynamic parameter,respectively. Thehigh temperaturemechanical propertiesat 3 different temperatureswere tested,and the melting point is predicted to analyze the FEM calculation result. The result shows that the pulsed laser welding energy is more concentrated than that of arc welding,the core inside the supercapacitor and the rubber component will not be destroyed by high welding temperature during the whole welding process.