基于SLM工艺的点阵结构优化设计工艺要素  

Research on process elements of lattice structure optimization design based on the SLM process

作　　者：敬晨晨 卢继平[1,2] 庞璐[1] JING Chenchen;LU Jiping;PANG Lu(School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China;Yangtze River Delta Research Institute,Beijing Institute of Technology(Jiaxing),Jiaxing 314019,China)

机构地区：[1]北京理工大学机械与车辆学院,北京100081 [2]北京理工大学长三角研究院(嘉兴),浙江嘉兴314019

出　　处：《实验技术与管理》2025年第2期28-36,共9页Experimental Technology and Management

摘　　要：为了研究SLM工艺对点阵结构的影响,设计了SLM工艺对点阵结构中杆单元的形貌和力学性能影响的实验方案,发现SLM工艺对不同倾角的杆单元的成形质量有很大影响,随倾角的增大成型误差也逐渐减小。杆单元的直径对成型质量存在着一定的影响,随着直径的增加,相对误差也随之减小;杆单元的直径和倾角对其力学性能没有影响。实验最后拟合得到了一组杆单元横截面积预测公式,该公式能够根据杆单元的倾角和设计直径预测在当前工艺下制造后的杆单元直径,从而在设计阶段就对其修正以减小采用SLM加工带来的误差,使得生产出来的产品性能更加符合预期,对整个结构设计领域具有重要意义。[Objective]Owing to the unique manufacturing process of selective laser melting(SLM),designing and manufacturing parts with complex geometries,including cantilever structures,can pose major challenges.This study aims to investigate the effects of the SLM processing angle and diameter on the appearance and mechanical performance of rod units.[Methods]Two groups of samples were designed and manufactured.An experimental approach was developed to evaluate the appearance and mechanical performance of the rod unit in the SLM process,focusing on the point-line structure.[Results]Through appearance observation and mechanical testing,the following conclusions were drawn:1)Regardless of the addition of a support,the inclined angle considerably affects the shape quality of the pole.As the tilt angle increases,the appearance error of the rod gradually decreases.When the angle is less than 30°,the vertical error is large(greater than 0.2 mm).When the tilt angle is 45°,the error drops rapidly.Furthermore,when the tilt angle exceeds 45°,the error becomes less than 0.1 mm.The diameter of the rod unit has minimal effect on the contour error.However,as the design diameter increases,the relative error gradually decreases.2)When a support is added,the pole unit exhibits good mechanical properties,with a tensile strength as high as 1100 MPa.The tilt angle and the diameter of the rod have minimal effect on the mechanical properties,and their effect can be ignored when designing the dot matrix structure.3)An error formula for the rod unit and a calculation formula for the cross-sectional area are proposed.The former determines the vertical error based on the tilt angle,while the latter estimates the cross-sectional area of the rod unit.[Conclusions]This study shows that the angle of the rod component considerably affects its shape,while the mechanical performance and angle variations of the rod unit do not exhibit an inverse relationship.The formula proposed in this study can be used to predict the cross-sectional area of the rear r

关 键 词：SLM工艺 点阵结构 拓扑优化 增材制造 

分 类 号：TQ028.1[化学工程]