Izingxenye ezinhlanu zensimbi eyisihluthulelo zenziwe ngokuncibilika kwe-electron beam, engadlulisela imishayo yamabhokisi angenalutho nezindonga ezincane.Kodwa ukuphrinta kwe-3D kuyisinyathelo sokuqala kuphela.
Insimbi esetshenziswa ekunikezelweni kweciko i-PIXL, idivayisi ye-X-ray ye-petrochemical engahlaziya amasampula e-rock ku-Mars.Umthombo walesi sithombe nangaphezulu: NASA / JPL-Caltech
NgoFebhuwari 18, lapho i-rover ethi "Perseverance" ifika ku-Mars, izophatha izingxenye eziphrintiwe ze-3D zensimbi ezicishe zibe eziyishumi.Ezinhlanu zalezi zingxenye zizotholakala kumishini ebalulekile kumishini ye-rover: i-X-ray Petrochemical Planetary Instrument noma i-PIXL.I-PIXL, efakwe ekugcineni kwe-cantilever ye-rover, izohlaziya amasampula edwala nomhlabathi endaweni ye-Red Planet ukusiza ukuhlola amandla okuphila lapho.
Izingxenye eziphrintiwe ze-PIXL ze-3D zifaka ikhava yayo yangaphambili nekhava yangemuva, uhlaka olufakwayo, ithebula le-X-ray nokusekelwa kwetafula.Uma ubheka nje, zibukeka njengezingxenye ezilula, ezinye izingxenye zezindlu ezinodonga oluncane kanye nabakaki, zingase zenziwe ngeshidi lensimbi.Kodwa-ke, kuvela ukuthi izimfuneko eziqinile zaleli thuluzi (kanye ne-rover ngokuvamile) zifana nenani lezinyathelo zokucubungula ngemva kokucubungula ekukhiqizeni okungeziwe (AM).
Lapho onjiniyela be-NASA's Jet Propulsion Laboratory (JPL) baklama i-PIXL, abazange bazimisele ukwenza izingxenye ezilungele ukuphrinta kwe-3D.Esikhundleni salokho, banamathela "kusabelomali" esiqinile kuyilapho begxile ngokugcwele ekusebenzeni nasekuthuthukiseni amathuluzi angafeza lo msebenzi.Isisindo esabelwe se-PIXL singamakhilogremu angu-16 kuphela;ukweqa lesi sabelomali kuzobangela ukuthi idivayisi noma okunye ukuhlola "kweqe" ku-rover.
Nakuba izingxenye zibukeka zilula, lo mkhawulo wesisindo kufanele ucatshangelwe lapho uklama.Ibhentshi lomsebenzi we-X-ray, uhlaka lokusekela kanye nohlaka lokukhweza konke kwamukela isakhiwo sebhomu lebhokisi elingenalutho ukugwema ukuthwala noma yisiphi isisindo esengeziwe noma izinto zokwakha, futhi udonga lwekhava yegobolondo luncane futhi uhlaka luvala ithuluzi ngokuseduze.
Izingxenye eziphrintiwe ze-3D ezinhlanu ze-PIXL zibukeka njengobakaki abalula kanye nezingxenye zezindlu, kodwa ibhajethi eqinile yeqoqo idinga lezi zingxenye ukuthi zibe nezindonga ezincane kakhulu kanye nezakhiwo zamabhokisi angenalutho, okuqeda inqubo evamile yokukhiqiza esetshenziswa ukuzenza .Umthombo wesithombe: Izithasiselo Zombazi
Ukuze kwenziwe izingxenye zezindlu ezingasindi neziqinile, i-NASA yaphendukela ku-Carpenter Additive, umhlinzeki wempushana yensimbi kanye nezinsizakalo zokukhiqiza zokunyathelisa ze-3D.Njengoba incane indawo yokushintsha noma yokulungisa ukwakheka kwalezi zingxenye ezingasindi, I-Carpenter Additive yakhetha ukuncibilika kwe-electron beam (EBM) njengendlela yokukhiqiza engcono kakhulu.Le nqubo yokuphrinta ye-3D yensimbi ingakhiqiza imishayo yamabhokisi angenalutho, izindonga ezincane nezinye izici ezidingwa umklamo we-NASA.Nokho, ukuphrinta kwe-3D kuyisinyathelo sokuqala kuphela senqubo yokukhiqiza.
Ukuncibilika kwe-electron beam kuyinqubo yokuncibilika okuyimpushana esebenzisa ugongolo lwe-electron njengomthombo wamandla ukuze ukhethe ngokukhetha ukuhlanganisa izimpushana zensimbi.Wonke umshini ushiswa ngaphambili, inqubo yokunyathelisa yenziwa kulawa mazinga okushisa aphakeme, izingxenye ziphathwa ngokushisa lapho izingxenye zinyatheliswa, futhi impushana ezungezile i-semi-sintered.
Uma kuqhathaniswa nezinqubo ezifanayo ze-metal metal sintering (DMLS), i-EBM ingakhiqiza ama-rougher surface finishes nezici ezijiyile, kodwa izinzuzo zayo futhi ukuthi yehlisa isidingo sezakhiwo zokusekela futhi igwema isidingo sezinqubo ezisekelwe nge-laser.Izingcindezi ezishisayo ezingase zibe yinkinga.Izingxenye ze-PIXL ziphuma enqubweni ye-EBM, zikhudlwana ngosayizi, zinezindawo ezimahhadlahhadla, futhi zicupha amakhekhe ayimpuphu ku-geometry engenalutho.
I-Electron beam melting (EBM) inganikeza izinhlobo eziyinkimbinkimbi zezingxenye ze-PIXL, kodwa ukuze uziqedele, uchungechunge lwezinyathelo zokucubungula emva kokucubungula kufanele lwenziwe.Umthombo wesithombe: Izithasiselo Zombazi
Njengoba kushiwo ngenhla, ukuze kuzuzwe usayizi wokugcina, ukuphela kwendawo kanye nesisindo sezingxenye ze-PIXL, uchungechunge lwezinyathelo zokucubungula emva kokucubungula kufanele lwenziwe.Zombili izindlela zemishini nezamakhemikhali zisetshenziselwa ukususa impushana esele futhi bushelelezi indawo engaphezulu.Ukuhlolwa phakathi kwesinyathelo ngasinye senqubo kuqinisekisa ikhwalithi yayo yonke inqubo.Ukwakhiwa kokugcina kungamagremu angu-22 kuphela kunesamba sesabelomali esiphelele, esisengaphakathi kwebanga elivumelekile.
Ukuze uthole ukwaziswa okwengeziwe mayelana nokuthi lezi zingxenye zenziwa kanjani (okuhlanganisa izici zesikali ezihilelekile ekunyatheliseni kwe-3D, ukuklanywa kwezakhiwo ezisekelayo zesikhashana nezihlala unomphela, kanye nemininingwane yokukhishwa kwempushana), sicela ubheke lolu cwaningo lwecala futhi ubuke isiqephu sakamuva se-The Cool. Bonisa Izingxenye Ukuze uqonde ukuthi kungani, ngokuphrinta kwe-3D, lokhu kuyindaba engavamile yokukhiqiza.
Ku-carbon fibre reinforced plastics (CFRP), indlela yokukhipha impahla iyagxoba esikhundleni sokugunda.Lokhu kuyenza ihluke kwezinye izinhlelo zokusebenza ezicutshungulwayo.
Ngokusebenzisa ijiyomethri ekhethekile yokusika i-milling kanye nokwengeza uqweqwe oluqinile endaweni ebushelelezi, i-Toolmex Corp. idale umshini wokugaya ofaneleka kakhulu ukusikwa okusebenzayo kwe-aluminium.Ithuluzi libizwa ngokuthi "Mako" futhi liyingxenye yochungechunge lwamathuluzi ochwepheshe e-SharC.
Isikhathi sokuthumela: Feb-27-2021