【摘要】 本文基于ANSYS有限元软件，建立了SLM成形薄壁零件的热—力耦合动态模拟模型，采用高斯面热源作为激光输入，研究了薄壁零件在典型工艺参数下的应力场和形变规律。结果显示：在选定的工艺参数下，零件的总体形变规律为外壁的形变量大于内壁，高度略有缩短，壁厚减小，但整体形状无明显畸变；分析了冷却过程中的变形机理，提出了优化冷却方式、调整零件设计尺寸等方法，以提高尺寸精度。更多还原

【Abstract】 Based on ANSYS finite element software, this paper establishes a thermal-mechanical coupling dynamic simulation model for SLM forming of thin-walled parts. Gaussian surface heat source is used as laser input to study the stress field and deformation rules of thin-walled parts under typical process parameters.The results show that under selected process parameters, the overall deformation pattern of the part is that the outer wall has greater deformation than the inner wall, with a slight shortening in height, a decrease in wall thickness, but no significant distortion in the overall shape. The deformation mechanism during cooling is analyzed, and methods such as optimizing the cooling method and adjusting the part design size are proposed to improve dimensional accuracy.更多还原