文档名：薄壁件选区激光熔化成形精度控制分析及优化
摘要：为了解决薄壁件选区激光熔化成形(selectivelasermelting,SLM)过程中残余应力引起的变形问题,保证成形精度,以SLM制备的钛合金雷达屏蔽器为研究对象,使用固有应变法对其进行变形分析和应力分析.提出了一种基于体素仿真模型的反变形补偿方法,并对其进行实验验证.结果表明:SLM制备的屏蔽器残余应力和位移较大,最大分别达831MPa和0.61mm.经过反变形补偿后,屏蔽器表面区域的整体变形量偏差从0.582mm下降到0.438mm以内,误差减少24.7％,从而保证了屏蔽器的打印质量.
Abstract：Inordertosolvethedeformationproblemofthin-walledpartscausedbyresidualstressduringtheSelectiveLaserMelting(SLM)processandensureformingaccuracy,thispapertakesthetitaniumalloyradarshieldingdevicepreparedbySLMastheresearchobjectandemploystheinherentstrainmethodtoanalyzeitsdeformationandstress.Itproposesananti-deformationcompensationmethodbasedonthevoxelsimulationmodelandexperimentallyverifythemethod.SelectiveLaserMelting(SelectiveLaserMelting)isoneofthemostmatureandwidelyusedmetaladditivemanufacturingtechnologiesinAdditiveManufacturing(AM),whichusesahighenergydensitylaserbeamasaheatsourcetomeltmetalpowderlayerbylayeraccordingtotheslicingpatternwiththeassistanceofcomputersoftware,andultimatelyaccumulatesandformsdensethree-dimensionalsolidparts,theprintedpartshavehighprecision,complexstructureandhighmaterialutilization,andarenowwidelyusedinaviation,aerospace,energy,automotiveandotherfields.However,theuneventemperaturegradientcausedbytherapidheatmeltingandcoolingsolidificationofmetalpowderintheSLMformingprocessgivesrisetolargeresidualstresses.Althoughtherehasbeenmuchresearchonreducingresidualstressandcontrollingformingaccuracy,researchershavenotcompletelysolvedthedeformationproblemofthin-walledpartsintheSLMprocess.Ontheonehand,duetothespecialstructureofthin-walledparts,theirindicationaccuracyrequirementsarealsohigher,anditisdifficulttouseinactualproductionbecauseofthehighcostofthewayofexperimentalmeasurements;ontheotherhand,ittakesalotofcomputationalandtimecostsinmodelsimulationandcomputationalcompensation.Basedontheintrinsicstrainmethod,itcalculatesthestressfieldanddeformationoftheTC4radarshieldingdevicepreparedinSLMandproposesananti-deformationcompensationmethodbasedonthevoxelgridsimulationmodeltosolvetheanti-deformationcompensationmodelquickly.TheresultsshowthattheresidualstressesanddisplacementsoftheshieldingdevicepreparedinSLMare831MPaand0.61mmrespectively.Aftertheanti-deformationcompensation,theoveralldeformationdeviationofthesurfaceareaoftheshieldingdevicedecreasesfrom0.582mmtowithin0.438mm,andtheaccuracyimprovesby24.7％,whichensurestheprintqualityoftheshieldingdevice.
作者：祝世超 丁雨露 施书杰 龙兵 陈荣华 尹飞鸿 赵景波 Author：ZHUShichao DINGYulu SHIShujie LONGBing CHENRonghua YINFeihong ZHAOJingbo
作者单位：常州工学院航空与机械工程学院,江苏常州213032常州工学院汽车工程学院,江苏常州213032
刊名：重庆理工大学学报 PKU
Journal：JournalofChongqingInstituteofTechnology
年，卷(期)：2024, 38(7)
分类号：V19
关键词：选区激光熔化 固有应变法 有限元分析 反变形补偿
Keywords：selectivelasermelting inherentstrainmethod finiteelementanalysis reversedeformationcompensation
机标分类号：U464O441.4TH133.2
在线出版日期：2024年6月24日
基金项目：中国博士后科学基金，国家自然科学基金，江苏省高等学校基础科学(自然科学)研究重大项目薄壁件选区激光熔化成形精度控制分析及优化[
期刊论文] 重庆理工大学学报--2024, 38(7)祝世超 丁雨露 施书杰 龙兵 陈荣华 尹飞鸿 赵景波为了解决薄壁件选区激光熔化成形(selectivelasermelting,SLM)过程中残余应力引起的变形问题,保证成形精度,以SLM制备的钛合金雷达屏蔽器为研究对象,使用固有应变法对其进行变形分析和应力分析.提出了一种基于体素仿真...参考文献和引证文献
参考文献
引证文献
本文读者也读过
相似文献
相关博文
薄壁件选区激光熔化成形精度控制分析及优化 Analysis and optimization of precision control for selective laser melting forming of thin-walled parts
薄壁件选区激光熔化成形精度控制分析及优化.pdf
- 文件大小:
- 4.13 MB
- 下载次数:
- 60
-
高速下载
|
|
