激光切割钕铁硼磁性材料温度场的仿真分析

Simulation analysis of temperature field of laser cut Nd Fe B magnetic material

为研究激光切割钕铁硼材料过程的温度场分布情况,综合考虑材料热物理性参数与温度的关系及相变潜热的影响,运用ANSYS有限元分析软件模拟激光切割钕铁硼过程,APDL编程语言实现热源的加载移动和对流换热加载。研究了脉冲激光作用下不同激光参数对工件最高温度的影响。模拟结果表明,温度分布表现为近似椭圆形状的温度扩散,最高温度集中在热源中心处;工件最高温度随着激光功率、脉冲宽度增大和切割速度的减小而增大,仿真结果为激光切割参数的合理选取提供一定的依据。

In order to study the temperature field distribution of laser cutting NdFeB materials,considering the relationship between thermal physical parameters and temperature of materials and the influence of latent heat of phase change,ANSYS finite element analysis software was used to simulate the process of laser cutting NdFeB,APDL programming language enable let the loading and convection heat transfer of the heat source realize.The influence of different laser parameters on the maximum temperature of the work piece under the action of pulsed laser is studied.The simulation results show that the temperature distribution shows the temperature diffusion of approximately elliptical shape,and the highest temperature is concentrated at the center of the heat source.The maximum temperature of the work piece increases with the laser power and pulse width.The large and cutting speed decreases and the simulation results provide a basis for the reasonable selection of laser cutting parameters.