Ukuphrinta kwe-SLS 3D umbhede wamandla wokuphrinta we-3D ubuchwepheshe obaziwa ngokunemba kwawo futhi asikho isakhiwo sokusekela. Nokho, izingxenye eziphrintiwe zekhwalithi ye-SLS 3D zifinyeleleka kuphela ngokulandela ikhono elifanele nesethi yemiklamo ye-SLS. Lesi sihloko sibonisa ukuthi ukuphrinta kwe-SLS 3D kusebenza kanjani, amathiphu edizayini ye-SLS, nezinhlelo zokusebenza ezijwayelekile zokuklama zenqubo yokuphrinta eyimpumelelo.
Isebenza kanjani Ukuphrinta kwe-SLS 3D
I-SLS ubuchwepheshe bokuphrinta be-3D obusetshenziswa abaningi amasevisi prototyping abasebenzisa i-laser ukuze bafake i-polymer powder futhi bakhe ungqimba lwengxenye ngongqimba ngokuya ngemodeli ye-CAD. Ngezansi kunencazelo yokuthi ubuchwepheshe busebenza kanjani:
Okokuqala, i-powder material ishiselwa ekushiseni okuphezulu futhi ifakwe ezingxenyeni ezincane (cishe u-0.1mm) nge-blade yokubuyisela endaweni yesikhulumi sokwakha. Ngemuva kwalokho, i-laser iskena ingaphezulu leplathifomu yokwakha.
Ngemuva kokuskena, i-laser ikhetha ngokukhetha into eyimpushana ukuyiqinisa. Ukuskena kuyaqhubeka kuze kuqedwe ukukhetha okukhethiwe. Ngemva kwalokho, inkundla yokwakha izokwehla ngobude obusendlalelo. Phakathi nale nqubo, impushana engafakwanga isesesiteji sokwakha. Ngenxa yalokho, izingxenye ze-SLS azidingi izakhiwo zokusekela.
I-recoating blade ibe isifaka ungqimba olusha lwempushana, futhi inqubo iphinda kuze kuqedwe konke ukuphrinta. Lapho uphrinta, isitsha sizoqukatha impushana engafakiwe kanye nengxenye ehlanganisiwe.
Amathiphu Wokuklama Izingxenye Ezingokwezifiso Ngokuphrinta kwe-SLS 3D
Njengengxenye yezinqubo zokukhiqiza ezifana nokubumba umjovo, i-die casting, nakho konke Imisebenzi yemishini ye-CNC, ukuphrinta kwe-SLS 3D kuza nezinselelo zakho. Nawa amathiphu ambalwa angasiza ukuthuthukisa inqubo yakho yokuklama ye-SLS.
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Ukubekezelelana Okujwayelekile
Ukubekezelelana kobukhulu kuncike kubukhulu bezingxenye eziphrintiwe kanye nokuba yinkimbinkimbi kwephrinta ye-3D. Nakuba kudingekile, kufanele ukhawule ukubekezelelana ezindaweni lapho kubaluleke kakhulu. Isibonelo, izingxenye ezidinga ukuhlangana. Amaphrinta amaningi e-SLS anokunemba kokuphrinta okungu-± 0.3mm no-± 0.05mm.
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Wall Ubukhulu
Ugqinsi lwezindonga zezingxenye eziphrintiwe ze-SLS 3D zinquma ukuzinza kwazo phakathi nangemuva kokuphrinta. Ngokuvamile, ukuba nodonga oluwugqinsi kuvimbela izingxenye eziphrintiwe ukuthi zingawi ngesikhathi sokuphrinta noma ukuphuka ngemva kokuphrinta.
Ngokusho kwabashisekeli bokuphrinta be-SLS 3D, ubukhulu bodonga obuncane kufanele bube phakathi kuka-0.7mm (PA 12) no-2.0mm (carbon-polyamide). Kodwa-ke, kungenzeka futhi ukuthi ube nokushuba kodonga okungaba ngu-0.6mm, nakuba uzodinga isakhiwo sokusekela.
Ukuphrinta ngokuqina kodonga okungaphansi kuka-0.5mm kuzoholela ezingxenyeni eziphrintiwe phezu kokuqina ngenxa yokushisa kwe-laser.
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Ubukhulu beHole
Ukuphrinta kwe-SLS kusekela izimbobo zokuphrinta ngokuqondile, ngokungafani nezinye izinqubo zokuphrinta ze-3D nezingezona ze-3D. Kodwa-ke, umgodi akufanele ube mncane kuno-1.5mm ububanzi. Ukuphrinta ngaphansi kuka-1.5mm kungaholela ekubeni impushana engafakiwe igcwalise umgodi. Ngenxa yalokho, phrinta ngosayizi womgodi omkhulu kuno-1.5mm ububanzi.
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Escape Holes
Ubuchwepheshe bombhede wamandla buphinde buvumele ukuthi wenze izingxenye ezingenalutho ukuze unciphise isisindo nokusetshenziswa kwezinto ezibonakalayo. Kodwa-ke, i-powder engafakiwe ingangena engxenyeni engenalutho ngesikhathi sokuphrinta. Ngenxa yalokho, izimbobo zokuphunyuka ziyadingeka ukuze kukhishwe izinto ezingafakiwe. Ukuphunyuka kufanele kube nobuncane obungu-3.5mm ububanzi.
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Ukuwohloka kwezindawo ezinkulu eziyisicaba
I-Warping iphutha lokuphrinta le-3D elenzeka ngenxa yokupholisa okungalingani ngemva kokuphrinta, ikakhulukazi ngezindawo ezinkulu eziyisicaba. Ngakho-ke, izindawo ezinjalo kufanele zigwenywe. Kodwa-ke, uma ziyingxenye ebalulekile yomklamo, kufanele usebenzise izakhiwo zokusekela (lokhu kungase kungayixazululi inkinga njalo).
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Ukuqopha nokugqamisa
Ezingxenyeni ezidinga ukuqoshwa noma ukugqamisa, ungathuthukisa ukubonakala ngokuklama izingxenye ngokujula okungenani okungu-1mm. Lokhu kubalulekile ukulandisa ngokucutshungulwa kwangemuva, njengokuwa kwemidiya okungaholela ekutheni iguge. Ematheksthini, kufanele usebenzise ukujula okungenani okungu-2mm ukuze kucace.
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Izingxenye ezihlanganayo
Ukuphrinta kwe-SLS 3D kulungele ukuphrinta ukukhwelana kanye nezingxenye ezihambayo ngaphandle kokudinga ukuthi izingxenye zihlukane. Kungaba ngcono uma uklama izingxenye ezidinga ukuhlangana ngokuvunyelwa okungenani okungu-0.5mm. Lokhu kukhishwa kuzosiza ekukhipheni impushana engafakwanga ukuze kuvinjwe izingxenye ukuthi zingahlangani.
Izinhlelo zokusebenza ezijwayelekile zokuklama
Izingxenye eziphrintiwe ze-SLS 3D ziyasebenza ekukhiqizeni okuyingxenye noma amasevisi prototyping ezimbonini eziningana. Ngezansi ezinye izinhlelo zokusebenza ezijwayelekile zenqubo:
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Ama-axle
Inayiloni iyasebenza kuma-axles e-prototyping ngenxa yokushelela kwayo, ukumelana namakhemikhali, indlela ephansi yokungqubuzana, kanye nesivinini esiphansi. Uma usebenzisa inayiloni ekwenzeni ama-ekseli agijimayo, indawo enconyiwe yokukhipha indawo yokuthwala ingu-0.3mm. Ngaphezu kwalokho, ukususwa okufanele kwe-powder engafakiwe kuyadingeka ukuze kugcinwe i-shaft ehamba kahle.
Idizayini yemodeli ye-CAD kufanele ihlanganise izimbobo zokuphuma ezinobuncane obungu-3.5mm ububanzi lapho kungenzeka khona kanye nokuvuleka okungu-2mm phakathi kwembobo ye-shaft yokukhipha kanye ne-asili ye-shaft egijimayo ukuze kukhishwe impushana engacwile.
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Amahinge ahlanganisiwe
Ukuphrinta kwe-SLS kuyasebenza ekuklameni amahinge ahlanganisiwe. Iphakethe elimise okwe-trapezoid elihlanganisa ibhola eliyisiyingi lizokhiqiza ihinge elinokungqubuzana okuphansi nokuzinza okwanele. Ngaphezu kwalokho, kufanele kube nokucaciswa okungu-0.2mm phakathi kwe-sphere nephakethe kanye nokucaciswa okungu-0.3mm kwezinye izikhala.
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Amathangi
Inayiloni ye-SLS iyasebenza ekwakhiweni kwethangi langokwezifiso. Lapho amathangi aklama ngokwezifiso, ukujiya kodonga okunconyiwe kufanele kube kukhulu kuno-1mm, futhi kufanele kube nezimbobo zokuphuma ukuze kukhishwe impushana eningi kanye engacwilisiwe. Ngaphezu kwalokho, ithangi lingambozwa ukuze lisebenze emanzini anolaka njengamafutha noma lithuthukise ukucinana kwamanzi.
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imicu
Izingxenye eziphrintiwe ze-SLS 3D zinendawo ephezulu ekhungathekayo. Ngenxa yalokho, kungase kube nezinkinga lapho kuhlanganiswa izingxenye eziphrintiwe ze-SLS 3D ezinentambo. Inketho engcono kungaba ukusebenzisa inayiloni ye-SLS ekuxhumekeni okukodwa nje (kungaba imbobo noma ibhawudi).
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Ama-Hinges aphilayo
Ukuphrinta kwe-SLS 3D kuyindlela efaneleke kakhulu yokwenza amahinge aphilayo asebenzayo. Ukuze wenze amahinji, yibambe ngokuyifudumeza futhi uyigobe phambili naphambili. Ihinge eliphilayo kufanele libe wugqinsi oluyi-0.3-0.8mm nobude obuncane obungu-5mm.
Isiphetho
Ukuphrinta kwe-SLS 3D kudumile ngenxa yokunemba kwakho futhi akukho sakhiwo sokusekela. Nokho, izingxenye eziphrintiwe zekhwalithi ye-SLS 3D zifinyeleleka kuphela ngokulandela isethi yemihlahlandlela yokuklama ye-SLS nolwazi. Lesi sihloko sikhuluma ngokuphrinta kwe-SLS 3D, amathiphu ezingxenye zokuklama ngokwezifiso, nezinye izinhlelo zokusebenza zenqubo. Ukulandela lawa macebiso, qiniseka ngezingxenye ze-SLS ezingenasici
