Ukunyibilika kwe-Electron Beam(EBM)
Ukunyibilika okuKhethekileyo kwe-Electron Beam (EBSM) Umgaqo
Ngokufana ne-laser selective sintering kunyeUkunyibilika kweLaser okukhethiweyoiinkqubo, itekhnoloji ye-electron beam ekhethiweyo yokunyibilikisa (EBSM) yitekhnoloji yokuvelisa ekhawulezayo esebenzisa imiqadi ye-electron ene-eneji ephezulu kunye nesantya esiphezulu ukukhetha umgubo wentsimbi webhombu, ngaloo ndlela unyibilika wenze izinto zomgubo.
Inkqubo ye-EBSM ubuchwepheshe buhamba ngolu hlobo lulandelayo: okokuqala, sasaza umaleko womgubo kwinqwelomoya yokusasaza umgubo;ke, phantsi kolawulo lwekhompyuter, umqadi we-electron unyibilikisiwe ngokukhetha ngokweenkcukacha zeprofayili yecandelo elinqamlezayo, kwaye umgubo wesinyithi unyibilikiswa kunye, udityaniswe nenxalenye eyenziweyo engezantsi, kwaye ufunjwe umaleko ngokwemaleko de yonke inxalenye iphelele. inyibilika;Ekugqibeleni, umgubo ogqithisileyo uyasuswa ukuze uvelise imveliso efunwayo enemigangatho emithathu.Isiginali yokuskena yexesha lokwenyani yekhompyuter ephezulu igqithiselwa kwidyokhwe yokuphambuka emva koguqulo lwedijithali ukuya kwi-analog kunye nokukhulisa amandla, kwaye umqa we-electron ujikisiwe phantsi kwesenzo sommandla wamagnetic oveliswe ngumbane wokuphambuka ohambelanayo ukufezekisa ukunyibilika okukhethiweyo. .Emva kweminyaka engaphezulu kweshumi yophando, kufunyaniswe ukuba ezinye iiparamitha zenkqubo ezifana ne-electron beam yangoku, igxile ngoku, ixesha lesenzo, ubukhulu bepowder, i-voltage ekhawulezayo, kunye nemowudi yokuskena ziyenziwa kwiimvavanyo ze-orthogonal.Ixesha lesenzo linempembelelo enkulu ekubumbeni.
Iingeneloye-EBSM
Itekhnoloji yokwenza itekhnoloji yentsimbi ye-Electron isebenzisa imiqadi ye-electron ene-eneji ephezulu njengomthombo wobushushu.Ukuskena ukubunjwa kunokwenziwa ngaphandle kwe-inertia yomatshini ngokulawula ikhoyili yokuphambuka kwemagnethi, kunye nemeko-bume yevacuum ye-electron beam inokuthintela umgubo wesinyithi ekubeni ufakwe oxid ngexesha lesigaba solwelo sokunyibilika okanye ukunyibilika.Xa kuthelekiswa ne-laser, i-electron beam ineenzuzo zezinga eliphezulu lokusetyenziswa kwamandla, ubunzulu besenzo esikhulu, izinga eliphezulu lokufunxa izinto, ukuzinza kunye nokusebenza okuphantsi kunye neendleko zokugcina.Izibonelelo zetekhnoloji ye-EBM zibandakanya ukusebenza kakuhle okuphezulu, ukuguqulwa kwenxalenye ephantsi, akukho mfuneko yenkxaso yentsimbi ngexesha lenkqubo yokwenza, i-microstructure exineneyo, njalo njalo.Ukuphambuka komqadi we-electron kunye nolawulo lokujolisa ngokukhawuleza kwaye lunovakalelo.Ukuphambuka kwelaser kufuna ukusetyenziswa kwesipili esingcangcazelayo, kwaye isantya esijikelezayo sesibuko sikhawuleza kakhulu xa iskena i-laser ngesantya esiphezulu.Xa amandla e-laser anyuswa, i-galvanometer idinga inkqubo yokupholisa eyinkimbinkimbi, kwaye ubunzima bayo banda kakhulu.Ngenxa yoko, xa usebenzisa ukuskena kwamandla aphezulu, isantya sokuskena selaser siya kuthintelwa.Xa uskena uluhlu olukhulu lokubumba, ukutshintsha ubude obugxininise belaser nako kunzima.Ukuphambuka kunye nokugxila kwe-electron beam kufezekiswa yintsimi yamagnetic.Ukuphambuka kunye nobude obugxininise bomqa we-electron bunokulawulwa ngokukhawuleza kunye novelwano ngokuguqula ubunzulu kunye nolwalathiso lwesignali yombane.Inkqubo yokugxininisa i-electron beam beam ayiyi kuphazamiseka yi-metal evaporation.Xa unyibilika isinyithi kunye ne-laser kunye nemiqadi ye-electron, umphunga wesinyithi uya kusasazeka kuyo yonke indawo yokwenza kwaye ugqume umphezulu wayo nayiphi na into edibene nefilimu yesinyithi.Ukuphambuka kunye nokugxila kwimiqadi ye-electron zonke zenziwa kwintsimi yamagnetic, ngoko abayi kuchaphazeleka ngokunyuka kwesinyithi;izixhobo zokukhanya ezifana ne-laser galvanometers zingcoliseka ngokulula ngokunyuka komphunga.
Laser mnatal Ukubekwa(LMD)
ILaser Metal Deposition (LMD) yacetywa okokuqala yiSandia National Laboratory eUnited States ngeminyaka yoo-1990, emva koko yaphuhliswa ngokulandelelana kwiindawo ezininzi zehlabathi.Ekubeni iiyunivesithi ezininzi kunye namaziko aqhuba uphando ngokuzimeleyo, le teknoloji Kukho amagama amaninzi, nangona amagama awafani, kodwa imigaqo yawo iyafana.Ngexesha lenkqubo yokubumba, umgubo uqokelelwa kwinqwelo-moya esebenzayo ngombhobho, kwaye umqadi we-laser nawo uqokelelwa kweli nqanaba, kwaye umgubo kunye namanqaku entshukumo yokukhanya ayenzeka ngengozi, kwaye iqumrhu eligqunyiweyo lifunyanwa ngokuhamba ngetafile yokusebenza. okanye umlomo.
Itekhnoloji yeLENS isebenzisa i-kilowatt-class lasers.Ngenxa yendawo enkulu ekugxilwe kuyo ngelaser, ngokubanzi ngaphezulu kwe-1mm, nangona izinto zetsimbi ezixineneyo zibotshelelwe ngokwesinyithi zinokufumaneka, ukuchaneka kwazo komda kunye nokugqitywa komphezulu akulunganga kakhulu, kwaye ukwenziwa komatshini kuyafuneka phambi kokusetyenziswa.I-Laser cladding yinkqubo enzima yomzimba kunye neekhemikhali ye-metallurgical, kwaye iiparameters zenkqubo yokugquma zinempembelelo enkulu kumgangatho weendawo ezigqunyiweyo.Iiparamitha zenkqubo kwi-laser cladding ikakhulu zibandakanya amandla e-laser, ubukhulu bendawo, isixa sokungagxinisi, isantya sokutya umgubo, isantya sokuskena, ubushushu bechibi elinyibilikisiweyo, njl. .Ngexesha elifanayo, ipharamitha nganye ichaphazela enye nenye, eyona nkqubo inzima kakhulu.Iindlela ezifanelekileyo zokulawula kufuneka zamkelwe ukulawula izinto ezahlukeneyo ezinempembelelo ngaphakathi koluhlu oluvumelekileyo lwenkqubo yokugquma.
NgqoIntsimbi yeLaser Sphakathinge(DMLS)
Ngokuqhelekileyo kukho iindlela ezimbini zokuSLSukwenza iindawo zetsimbi, enye yindlela engathanga ngqo, oko kukuthi, i-SLS ye-polymer-coated metal powder;enye yindlela ethe ngqo, oko kukuthi, Direct Metal Laser Sintering (DMLS) .Ukusukela uphando kwi-laser sintering ngqo yomgubo wesinyithi lwaqhutywa kwiYunivesithi yaseChatofci eLeuvne ngo-1991, ukucwiliswa ngokuthe ngqo komgubo wesinyithi ukwenza amacandelo amathathu-dimensional. ngenkqubo ye-SLS yenye yeenjongo zokugqibela zeprototyping ekhawulezayo.Xa kuthelekiswa neteknoloji ye-SLS engathanga ngqo, inzuzo ephambili yenkqubo ye-DMLS kukupheliswa kweendleko ezibizayo kunye nexesha elide lokunyangwa kwangaphambili kunye namanyathelo enkqubo yonyango.
Iimbonakalo yeDMLS
Njengesebe letekhnoloji ye-SLS, itekhnoloji ye-DMLS inomgaqo ofanayo.Nangona kunjalo, kunzima ukwenza ngokuchanekileyo iinxalenye zetsimbi ezinemilo enzima ngeteknoloji ye-DMLS.Kuhlalutyo lokugqibela, ikakhulu ngenxa yesiphumo "spheroidization" kunye ne-sintering deformation ye powder yensimbi kwi-DMLS.I-Spheroidization yinto apho imilo yomphezulu yolwelo olunyibilikisiweyo iguqukela kumphezulu ongqukuva phantsi koxinzelelo oluphakathi kobuso phakathi kwesinyithi elulwelo kunye nendawo ejikelezileyo ukuze kwenziwe inkqubo equlunqwe ngumphezulu wolwelo olunyibilikisiweyo kunye nomphezulu wesinyithi. isiphakathi esisingqongileyo esinamandla asimahla asezantsi.I-Spheroidization iya kwenza ukuba i-powder yensimbi ingakwazi ukuqiniswa emva kokunyibilika ukwenza i-pool etyhidiweyo eqhubekayo kunye negudileyo, ngoko ke iindawo ezibunjiweyo zikhululekile kwaye zihamba, zibangele ukungaphumeleli kokubumba.Ngenxa ye-viscosity ephezulu yecandelo elinye lomgubo wesinyithi kwinqanaba lolwelo lokuntywila, isiphumo se-"spheroidization" sibi kakhulu, kwaye ububanzi be-spherical buhlala bukhulu kunobubanzi bamasuntswana omgubo, nto leyo ekhokelela kwinani elikhulu lomgubo. imingxunya kwiindawo ezine-sintered.Ngoko ke, i-DMLS yecandelo elilodwa lomgubo wensimbi ineziphene ezicacileyo zenkqubo, kwaye ihlala ifuna unyango olulandelayo, kungekhona ingqiqo yangempela "ye-sintering ngqo".
Ukuze woyise isenzeko se "spheroidization" yecandelo elinye lomgubo wesinyithi iDMLS kunye neziphene zenkqubo ezifana ne-sintering deformation kunye noxinaniso oluxekileyo, lunokufezekiswa ngokubanzi ngokusebenzisa umgubo wesinyithi wamacandelo amaninzi aneendawo ezahlukeneyo zokunyibilika okanye ukusebenzisa umgubo wangaphambili. .Isixokelelwano somgubo wesinyithi samacandelo amaninzi senziwa ngokubanzi ziintsimbi eziphezulu zokunyibilika, iindawo ezisezantsi zokunyibilika kwesinyithi kunye nezinye izinto ezongeziweyo.Umgangatho ophezulu wokunyibilika wesinyithi njengomgubo wentsimbi njengoko isinyithi samathambo sinokugcina isiseko saso esiqinileyo kwi-DMLS.Iqondo eliphantsi lokunyibilika umgubo wesinyithi usetyenziswa njengentsimbi yokubopha, enyibilikiswa kwi-DMLS ukwenza inqanaba lolwelo, kunye nesiphumo seedyasi zesigaba solwelo, ukumanzisa kunye neebhondi zamasuntswana entsimbi yesigaba esiluqilima ukuphumeza ingxinano ye-sintering.
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Umnikeli: Sammi