Lub tsib yam ntawm cov cuab yeej tseem ceeb yog tsim los ntawm electron beam melting, uas muaj peev xwm kis tau hollow box beams thiab nyias phab ntsa.Tab sis 3D luam ntawv tsuas yog thawj kauj ruam.
Cov cuab yeej siv hauv kev ua yeeb yam yog PIXL, cov khoom siv hluav taws xob xoo hluav taws xob uas tuaj yeem txheeb xyuas cov qauv pob zeb ntawm Mars.Qhov chaw ntawm daim duab no thiab saum toj no: NASA / JPL-Caltech
Thaum Lub Ob Hlis 18, thaum lub "Perseverance" rover tsaws rau Mars, nws yuav nqa ze li kaum hlau 3D luam tawm qhov chaw.Tsib ntawm cov khoom no yuav pom nyob rau hauv cov cuab yeej tseem ceeb rau lub hom phiaj rover: X-ray Petrochemical Planetary Instrument lossis PIXL.PIXL, ntsia rau ntawm qhov kawg ntawm lub cantilever ntawm lub rover, yuav tshuaj xyuas cov pob zeb thiab cov qauv av nyob rau saum npoo ntawm lub Ntiaj Teb Liab los pab ntsuas lub neej muaj peev xwm nyob ntawd.
PIXL's 3D luam tawm qhov chaw suav nrog nws lub hau pem hauv ntej thiab nraub qaum, mounting ncej, X-ray rooj thiab lub rooj txhawb nqa.Thaum xub thawj siab ib muag, lawv zoo li tej yam yooj yim qhov chaw, ib co nyias-walled vaj tse qhov chaw thiab brackets, tej zaum lawv yuav ua los ntawm cov ntawv hlau.Txawm li cas los xij, nws hloov tawm tias cov kev cai nruj ntawm cov cuab yeej no (thiab rover feem ntau) phim tus lej ntawm cov txheej txheem tom qab ua tiav hauv kev tsim khoom ntxiv (AM).
Thaum cov engineers ntawm NASA's Jet Propulsion Laboratory (JPL) tsim PIXL, lawv tsis tau teeb tsa los ua cov khoom tsim nyog rau 3D luam ntawv.Hloov chaw, lawv ua raws li "cov peev nyiaj" nruj me ntsis thaum ua haujlwm siab rau kev ua haujlwm thiab tsim cov cuab yeej uas tuaj yeem ua tiav txoj haujlwm no.Qhov hnyav ntawm PIXL tsuas yog 16 phaus;tshaj qhov peev nyiaj no yuav ua rau lub cuab yeej lossis lwm yam kev sim "dhia" los ntawm rover.
Txawm hais tias cov khoom zoo li yooj yim, qhov kev txwv qhov hnyav no yuav tsum tau muab coj los xav thaum tsim.X-ray workbench, txhawb thav duab thiab mounting ncej tag nrho txais yuav ib tug hollow lub thawv beam qauv kom tsis txhob muaj tej yam hnyav ntxiv los yog cov ntaub ntawv, thiab cov phab ntsa ntawm lub plhaub npog yog nyias thiab cov txheej txheem ntau ze rau qhov ntsuas.
PIXL's tsib 3D luam tawm qhov zoo li yooj yim bracket thiab cov khoom vaj tse, tab sis nruj batch pob nyiaj siv yuav tsum tau cov khoom no kom nyias nyias phab ntsa thiab hollow box beam qauv, uas tshem tawm cov pa kev tsim khoom siv los tsim lawv.Yees duab Source: Carpenter Additives
Txhawm rau tsim cov khoom hnyav thiab ruaj khov, NASA tig mus rau Carpenter Additive, tus muab cov hmoov hlau thiab 3D luam ntawv ntau lawm.Txij li thaum tsis muaj chaw me me rau kev hloov lossis hloov kho qhov tsim ntawm cov khoom sib sib zog nqus no, Carpenter Additive xaiv electron beam melting (EBM) ua txoj kev tsim khoom zoo tshaj plaws.Cov txheej txheem hlau 3D luam ntawv no tuaj yeem tsim cov kab hollow lub thawv, cov phab ntsa nyias thiab lwm yam uas xav tau los ntawm NASA tus tsim.Txawm li cas los xij, 3D luam ntawv tsuas yog thawj kauj ruam hauv kev tsim khoom.
Electron beam melting yog txheej txheem hmoov yaj uas siv cov nqaj hlau hluav taws xob ua lub zog los xaiv cov hmoov hlau sib xyaw ua ke.Tag nrho lub tshuab yog preheated, cov txheej txheem luam ntawv yog nqa tawm ntawm qhov kub siab no, cov khoom tseem ceeb yog kub-kho thaum cov khoom luam tawm, thiab cov hmoov nyob ib puag ncig yog semi-sintered.
Piv nrog cov txheej txheem zoo sib xws ntawm cov hlau laser sintering (DMLS), EBM tuaj yeem tsim cov txheej txheem rougher nto thiab cov yam ntxwv tuab dua, tab sis nws qhov zoo kuj yog tias nws txo qhov kev xav tau ntawm cov qauv kev txhawb nqa thiab zam qhov kev xav tau ntawm cov txheej txheem laser.Thermal stresses tej zaum yuav muaj teeb meem.PIXL cov khoom tawm los ntawm cov txheej txheem EBM, muaj qhov loj me me, muaj qhov ntxhib saum npoo, thiab ntxiab hmoov ncuav mog qab zib hauv qhov hollow geometry.
Electron beam melting (EBM) tuaj yeem muab cov ntaub ntawv nyuaj ntawm PIXL qhov chaw, tab sis kom ua tiav lawv, cov txheej txheem tom qab ua tiav yuav tsum tau ua.Yees duab Source: Carpenter Additives
Raws li tau hais los saum toj no, txhawm rau ua kom tiav qhov loj me, qhov ua tiav thiab qhov hnyav ntawm PIXL Cheebtsam, yuav tsum ua cov kauj ruam tom qab ua tiav.Ob txoj kev siv tshuab thiab tshuaj siv los tshem tawm cov hmoov seem thiab du nto.Kev tshuaj xyuas ntawm txhua tus txheej txheem ua kom muaj txiaj ntsig zoo ntawm tag nrho cov txheej txheem.Qhov kawg muaj pes tsawg leeg tsuas yog 22 grams siab dua li tag nrho cov peev nyiaj, uas tseem nyob hauv qhov kev tso cai.
Yog xav paub ntxiv txog yuav ua li cas cov khoom no raug tsim tawm (nrog rau qhov ntsuas qhov cuam tshuam hauv 3D luam ntawv, tsim cov qauv kev txhawb nqa ib ntus thiab mus tas li, thiab cov ntsiab lus ntawm kev tshem tawm cov hmoov), thov mus saib cov ntaub ntawv no thiab saib cov ntu tshiab ntawm The Cool Parts Show Kom nkag siab tias yog vim li cas, rau 3D luam ntawv, qhov no yog ib qho txawv txawv ntau lawm zaj dab neeg.
Nyob rau hauv carbon fiber reinforced plastics (CFRP), cov khoom tshem tawm mechanism yog crushing es shearing.Qhov no ua rau nws txawv ntawm lwm cov ntawv thov ua haujlwm.
Los ntawm kev siv qhov tshwj xeeb milling cutter geometry thiab ntxiv cov txheej tawv tawv rau qhov chaw du, Toolmex Corp. tau tsim ib qho kawg zeb uas tsim nyog rau kev txiav cov txhuas.Cov cuab yeej hu ua "Mako" thiab yog ib feem ntawm lub tuam txhab SharC cov cuab yeej tshaj lij.
Post lub sij hawm: Feb-27-2021