摘要
选择性激光熔化(Selective Laser Melting,SLM)技术是增材制造(Additive Manufacturing,AM)过程中最具潜力的技术之一。在SLM激光照射下,金属粉末粒子完全熔化凝固在一起,从而形成三维组件。拓扑优化(Topology Optimization,TO)是一种针对给定的问题计算最优材料分布的优化方法。SLM技术结合拓扑优化方法可以开发创建更多轻量化组件。在整个制造过程中,可以从优化设计、生产和测试3个方面解决问题。拓扑优化的解决方案是对AM技术的进一步解释和设计,在解释和设计过程中,设计方法为了方便获得更准确的解决方案而被定义。经过拓扑优化后的组件不仅体积、重量得到降低,安全系数也相应地提高。为了验证组件的设计与计算机分析的结果,拓扑优化后的机械组件需要进行生产、计量和机械测试。实验测试结果与计算机分析结果之间具有密切联系,通过两者之间的差异可以进一步优化设计。
Additive Manufacturing(AM)is a manufacturing process through which a 3D component is produced by consecutively addingmaterial.One of the most promising AM processes is SLM.In SLM a laser completely melts metallic powder particles togetherforming a 3D component.SLM is known for its freedom of manufacturing constraints allowing complex geometries and highmaterial efficiency.Topology Optimisation(TO)is an optimisation type that calculates the optimal material distribution for agiven problem.The combination of SLM with TO is being developed to create lightweight components.In this work,the whole development process,from optimisation to design,production and testing is addressed.Initially,an aircraft bracket topology wasoptimised to be produced by means of SLM.The TO solution was interpreted and designed for AM.During the interpretationand design process,a design methodology was defined in order to facilitate and make more accurate the TO solution design andmake it ready for AM.After the optimised component was produced,metrological and mechanical tests were performed in orderto validate the final design and the computer analysis.The optimised component showed considerable weight reduction with anincrease of the factor of safety.The experimental tests revealed a good relation to the computer analysis evidencing,however,room for improvement,both in the computer model and the experimental tests.
作者
王仁
杨伟群
Wang Ren;Yang Weiqun(School of Mechanical Engineering and Automation,Beihang University,Beijing 100191,China)
出处
《现代制造工程》
CSCD
北大核心
2018年第12期24-30,共7页
Modern Manufacturing Engineering
关键词
增材制造
选择性激光熔化
拓扑优化
面向AM设计
Additive Manufacturing (AM)
Selective Laser Melting (SLM)
Topology Optimisation (TO)
design for AM
