摘要
介绍了激光辅助加热加工技术,在传热理论模型基础上,使用有限元分析软件COMSOL Multiphysics得到了激光加热状态下的2024铝合金材料的温度场分布,并研究了激光参数对表面和深度方向的温度场的影响。仿真研究结果表明:激光加热辅助加工使得铝合金表面温度明显提高;铝合金表面激光中心点处的最高温度随着激光功率的增大而升高,随着光斑尺寸的增大而降低;在深度方向,随着加热时间的累积,激光加热辅助起到一定增温作用,激光加热的热累积效应显著;在表面温度场分布均匀性方面,在高温区300~390℃,功率为20 W、激光半径为0.10 mm时温度均匀性最好;在中温区200~300℃,功率为20 W、半径为0.15 mm时温度均匀性最好;在低温区60~180℃,功率为10 W、半径为0.10 mm时温度均匀性最好。
In this paper,laser-assisted heating technology is introduced.On the basis of heat transfer theory model,the temperature field distribution of 2024 aluminum alloy material under laser heating condition is obtained by using the finite element analysis software COMSOL Multiphysics,and the influence of laser parameters on the surface and depth direction temperature field is studied.The simulation results show that the surface temperature of aluminum alloy can be improved obviously by laser heating assisted machining.The maximum temperature at laser center on aluminum alloy surface increases with the increase of laser power.It decreases with the increase of spot size.At the same time,in the depth direction,with the accumulation of heating time,the laser heating assistant has a certain warming effect,and the heat accumulation effect of laser heating is significant.In terms of the uniformity of the surface temperature field distribution,the uniformity is best in the high temperature region,namely 300℃to 390℃,the power is 20 W,the laser radius is 0.10 mm;The temperature uniformity is best when the power is 20 W and the radius is 0.15 mm in the medium temperature region,200℃to 300℃.Temperature uniformity is best in the low-temperature region,60℃to 180℃,with a power of 10 W and a radius of 0.10 mm.
作者
历波
薛勃
张津铭
尹若楠
Li Bo;Xue Bo;Zhang Jinming;Yin Ruonan(College of Mechanical and Electrical Engineering,Northeast Forestry University,Harbin,Heilongjiang 150000,China)
出处
《应用激光》
CSCD
北大核心
2022年第11期121-128,共8页
Applied Laser
基金
中国博士后科学基金面上项目(2022M710642)。
