面向空间服役环境的激光选区熔化天线组件的形性测试与工程化应用研究  

Shape-Performance Testing and Engineering Application of Antenna Components Formed by Selected Laser Melting Components for Space Service Environment

作　　者：陈天宇 包杰 孔勇 Chen Tianyu;Bao Jie;Kong Yong(Nanjing Electronic Equipment Research Institute,Nanjing 211103,Jiangsu,China)

机构地区：[1]南京电子设备研究所,江苏南京211103

出　　处：《中国激光》2024年第24期175-184,共10页Chinese Journal of Lasers

基　　金：中国航天科工集团工艺振兴项目。

摘　　要：为验证激光选区熔化(SLM)成形样件能够满足工程应用公差、性能、环境适应性要求,以星载某天线组件为研究对象,通过Simufact Additive建立了零件成形的位移场和应力场分析模型,预测了样件的成形偏差、等效应力及失效位置,并通过反变形法控制成形偏差,对成形的样件从尺寸公差、性能、环境适应性等方面进行了系统性验证。研究结果表明:固有应变法可准确预测零件成形偏差;通过反变形法迭代优化反变形零件,至少可降低39.47%的成形偏差,反变形零件的成形偏差仿真误差低于44.4%;成形样件满足外包络尺寸公差要求,力学性能优异,验收级环境试验前后组件的电气性能均符合指标要求,SLM成形零件具有工程应用可行性。Objective To verify the engineering application of selected laser melting(SLM)technology in aerospace products,systematic verification is conducted in terms of aspects such as dimensional tolerances,testing performance,and environmental testing.Owing to the high temperature gradient around the molten pool under the action of a moving heat source and the deposition undergoing heating and cooling cycles,SLM technology is prone to residual stress and deformation during part forming,thereby affecting the accuracy and quality of the parts.Therefore,it is necessary to accurately predict and control the residual stress and deformation of the parts.Conventional methods used to control the residual stress and deformation have limitations in their applicability to various characteristic parts.Therefore,more effective methods are necessary to suppress part-forming deviations and improve the quality of SLM-formed parts.Methods Taking a satellite-mounted antenna component as the research object,an SLM process simulation is performed using Simufact Additive.The simulation adopts a pure structural algorithm called the inherent strain method.The inherent strain value is calculated based on the process parameters,scanning strategy,and material characteristics,thereby establishing displacement and stress field analysis models for part forming and predicting the forming deviation,equivalent stress,and failure position of the sample.As the inherent strain method cannot accurately determine the anti-deformation amount,it can only be approximated with reasonable accuracy through an iterative method.The final shape error of the formed part can be calculated using a recursive formula for the antideformation structure.When the allowable shape error is satisfied,the iterative calculation ends,and the final anti-deformation shape function is obtained.Finally,the simulation results are experimentally verified,and performance and environmental tests are conducted.Results and Discussions This study fully verifies the environmental adaptabilit

关 键 词：增材制造 激光选区熔化 固有应变法 反变形法 成形偏差 工程应用 

分 类 号：V19[航空宇航科学与技术—人机与环境工程]