LaserMicroweldingTechnologyandEquipmentforCross-ScaleCollimatorGridofDee p-SpaceExplorationSatellite br

Huang Ting,Du Weizhe,Su Kun,Zhang Jianchao,Li Jingyang,Qi Junfeng,Lei Yongping,Wu Qiang,Xiao Rongshi

CHINESE JOURNAL OF LASERS-ZHONGGUO JIGUANG（2022）

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摘要

ObjectiveDeep-spaceexplorationisimportanttoinnovatespacetechnologyandexplorespaceresources Acollimatorisakeycomponentofadeep-spaceprobe however producingahighspatialresolutioncollimatorischallengingCurrentlythedeep-spaceexplorationcollimatorgridismostlycomposedofframes Castingorlaseradditivemanufacturingisusedtobuildtheinnergridstructure whichisquitethick aswellastheentireoutsidewall Thegridframeisthenusedtocreatethemicrogrooves Finallythecollimatorgridisformedbyinsertingtungstenortantalumfoilsintothemicrogrooves Furthermore collimatorgridmanufacturingtechnologiesincludeLIGAandelectricaldischargewire-cuttingTheseapproachesmayresultinthickwalls limitingthecollimator????sdutyratioandefficiencyorresultinalongermanufacturingperiod highercost andasmallergridheight ThehardX-raymodulationtelescopesatelliteHXMTwhichChinadevelopedindependentlyisusedasanexampletopresentourresearchprogressonlasermicroweldingtechnologyandequipmentdevelopmentforthecross-scalecollimatorgrid whichisfundedbytheNationalKeyResearchandDevelopmentProgram MethodsThelaserspotweldingexperimentwasconductedfirsttoidentifytheweldingparametersbasedonthestructuralfeaturesoftheHXMTcollimator Thegriddeformationfiniteelementanalysiswasthenperformedtoprovidelaserweldingguidance Finallylaserweldingequipmentwasdesignedandvalidatedtomeetthegridcelllaserweldingrequirements ResultsandDiscussionsTheHXMTcollimatoriscomposedofanaluminumalloyframewithmanytantalumgridcellsplacedintoit Laserspotweldingjunctionpointsformedbytwoorthogonalarraysoftantalumfoilsareusedtocreatethegridcell Thefabricationoftantalumfoils gridcellassemblyandweldingandgridcellinsertionintothecollimatorframeareallpartofthemanufacturingprocessFig3Forlaserweldinggridcells anIPGYLM-150 1500-QCWquasicontinuousfiberlaserandaself-developedthree-dimensional3Ddynamicfocusinggalvanometerareemployed Withabeamdiameterof40 mu m laserpowerof180--220W andpulsewidthof6--10ms awell-formedweldingspotiscreatedFig4TheresultsofthefiniteelementanalysisshowthatinstabilitydeformationiscommonduringthelaserweldingofthecollimatorgridcellFig5Toaddressthisissue anintegratedsetcombiningtantalumfoilassemblyandcollimatorgridwelding insertionisdevelopedFig6Theassemblyerrorandweldingdeformationarewell-controlled resultinginthecollimatinghole????sdimensionsaccuracybeingwithi

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关键词

microfabrication, deep-spaceexploration, collimator, cross-scalegrid, lasermicro-welding, lasertechnique

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