选择性激光熔化中基于最小能量理论的参数优化研究

为了减小选择性激光熔化过程中的能量消耗,建立三维瞬态温度场模型,设置激光功率为2000W、光斑半径为4mm、扫描速度30mm/s;对单烧结道截面温度场进行研究,经过ANSYS仿真和MATLAB分析得到温度在径向深度方向呈高斯分布、径向宽度方向呈指数分布规律,在保证成型件质量的前提下结合最小能耗原则得出扫描间距为1.3mm;最后通过双烧结道的温度场模拟验证扫描间距设置的合理性,并通过相邻烧结道熔池截面模型确定铺粉层高为0.17mm,为选择性激光熔化过程中考虑能量消耗条件下的工艺参数优化提供了一种方法。

Parameter Optimization Research Based on Minimum Energy Theory in Selective Laser Melting

In order to reduce the energy consumption during selective laser melting,a three-dimensional transient temperature field model was established,and the laser power was set to 2000W,the spot radius was 4mm,and the scanning speed was 30mm/s.The temperature field of the single sinter section was studied,it is shown that the temperature is Gaussian in the radial depth direction and exponentially distributed in the radial width direction after the simulation with ANSYS and the analysis with MATLAB.Under the premise of ensuring the quality of the molded parts,the scanning distance is 1.3mm combined with the principle of minimum energy loss.Finally,the temperature field simulation of the double sintering channel is used to verify the rationality of the scanning spacing setting,and the height of the paving layer is determined by the adjacent sintering channel cross-section model to be 0.17mm,which provides a method for optimizing the process parameters under energy consumption conditions during selective laser sintering.