5052铝合金脉冲激光焊接温度场模拟

Temperature Field Simulation of 5052 Aluminum Alloy Pulsed Laser Welding

使用ANSYS有限元分析软件对5052铝合金薄板脉冲激光焊接过程进行温度场模拟,模型使用了三维锥体热源,通过模拟结果与试验结果的对比确认了模型的可靠性。通过分别改变峰值功率、脉宽和频率,分析了各焊接参数对焊缝截面形状及表面最高温度的影响。结果表明,焊缝的熔深、熔宽和表面最高温度均随峰值功率、脉宽或频率的增加而增加,其中,峰值功率对这些焊缝参数的影响最大,脉宽次之,频率最小。采用低单脉冲能量、高频率的参数设定能在获得较低的焊缝表面最高温度的同时,获得一定的熔深。

Temperature field in pulsed laser welding of thin 5052 aluminum alloy plate was simulated by the finite element software ANSYS. The finite element model was established with a threedimensional cone-type heat source, and the reliability of this model was verified by the comparison between the simulation results and experimental results. By changing the peak power, pulse width and frequency, the effects of different parameters on the weld profile and peak temperature were analyzed. The results show that the penetration, width and peak temperature of the weld increase with the increase of the peak power, pulse width and frequency, and the peak power has the greatest effect on the weld profile parameters, the pulse width is the second, the frequency is the third. Lower peak temperature and certain penetration can be obtained with low pulse energy and high frequency parameter setting.