Peb txhua tus tau ua cov tsev xuab zeb ntawm ntug hiav txwv: phab ntsa loj, cov pej thuam zoo nkauj, cov kwj dej puv nrog ntses ntses. Yog tias koj zoo li kuv, koj yuav xav tsis thoob tias cov dej me me lo ua ke zoo npaum li cas - tsawg kawg yog txog thaum koj tus tij laug loj tuaj thiab ncaws nws hauv qhov kev xyiv fab puas tsuaj.
Tus ua lag luam Dan Gelbart kuj siv dej los sib txuas cov khoom, txawm hais tias nws tus qauv tsim ruaj khov dua li qhov kev ua yeeb yam ntug hiav txwv thaum hnub so.
Ua tus thawj tswj hwm thiab tus tsim ntawm Rapidia Tech Inc., tus neeg muab khoom ntawm cov hlau 3D luam ntawv hauv Vancouver, British Columbia, thiab Libertyville, Illinois, Gelbart tau tsim ib txoj kev tsim khoom uas tshem tawm cov kauj ruam siv sijhawm ntau hauv cov thev naus laus zis sib tw thaum ua kom yooj yim rau kev tshem tawm kev txhawb nqa.
Nws kuj ua rau kev sib koom ua ke ntawm ntau qhov tsis nyuaj dua li tsuas yog muab lawv tso rau hauv dej me ntsis thiab nplaum ua ke - txawm tias rau cov khoom ua los ntawm cov txheej txheem tsim khoom ib txwm muaj.
Gelbart tham txog qee qhov sib txawv tseem ceeb ntawm nws cov txheej txheem dej thiab cov uas siv cov hmoov hlau uas muaj 20% txog 30% quav ciab thiab polymer (los ntawm qhov ntim). Rapidia ob lub taub hau hlau 3D tshuab luam ntawv tsim cov nplaum los ntawm cov hmoov hlau, dej thiab cov khoom siv resin hauv qhov ntau ntawm 0.3 txog 0.4%.
Vim li no, nws piav qhia, cov txheej txheem debinding uas cov thev naus laus zis sib tw xav tau, uas feem ntau siv sijhawm ob peb hnub, raug tshem tawm thiab qhov khoom tuaj yeem xa ncaj qha mus rau qhov cub sintering.
Cov txheej txheem lwm yam feem ntau yog nyob rau hauv "kev lag luam txhaj tshuaj molding (MIM) uas tau ntev lawm uas xav tau cov khoom tsis tau sintered kom muaj cov polymer ntau heev kom pab lawv tso tawm ntawm pwm," Gelbart hais. "Txawm li cas los xij, qhov ntau ntawm cov polymer uas xav tau los txuas cov khoom rau 3D printing yog qhov me me heev - ib feem kaum ntawm ib feem pua ​​​​​​yog txaus rau feem ntau."
Yog li ntawd, vim li cas ho haus dej? Ib yam li peb cov piv txwv xuab zeb siv los ua cov nplaum (cov nplaum hlau hauv qhov no), cov polymer tuav cov khoom ua ke thaum lawv qhuav. Qhov tshwm sim yog ib feem nrog qhov sib xws thiab qhov tawv ntawm cov chalk sidewalk, muaj zog txaus los tiv taus kev ua tom qab sib dhos, kev ua maj mam (txawm hais tias Gelbart pom zoo kom ua tom qab sintering), sib dhos nrog dej nrog lwm cov khoom tsis tiav, thiab xa mus rau qhov cub.
Kev tshem tawm cov roj av kuj tseem tso cai rau cov khoom loj dua, phab ntsa tuab dua kom luam tawm vim tias thaum siv cov hmoov hlau uas muaj polymer impregnated, cov polymer tsis tuaj yeem "hlawv tawm" yog tias phab ntsa tuab dhau.
Gelbart tau hais tias ib lub chaw tsim khoom siv xav tau phab ntsa tuab ntawm 6 hli lossis tsawg dua. "Yog li cia peb hais tias koj tab tom tsim ib feem txog qhov loj ntawm lub khoos phis tawj nas. Hauv qhov xwm txheej ntawd, sab hauv yuav tsum yog qhov khoob lossis tej zaum qee yam ntawm mesh. Qhov no zoo heev rau ntau daim ntawv thov, txawm tias lub hom phiaj yog qhov sib dua. Tab sis yog tias lub zog lub cev xav tau zoo li lub ntsia hlau lossis qee qhov muaj zog siab, ces [hlau hmoov txhaj tshuaj] lossis MIM feem ntau tsis haum. "
Ib daim duab manifold uas nyuam qhuav luam tawm tshiab qhia txog sab hauv uas lub tshuab luam ntawv Rapidia tuaj yeem tsim tau.
Gelbart taw qhia txog ntau yam ntxwv ntawm lub tshuab luam ntawv. Cov cartridges uas muaj cov hlau nplaum tuaj yeem rov ua dua tshiab thiab cov neeg siv xa rov qab mus rau Rapidia kom rov ua dua tshiab yuav tau txais cov ntsiab lus rau txhua yam khoom siv tsis siv.
Muaj ntau yam khoom siv, suav nrog 316 thiab 17-4PH stainless hlau, INCONEL 625, ceramic thiab zirconia, nrog rau tooj liab, tungsten carbide thiab ntau lwm yam khoom siv uas tab tom tsim kho. Cov ntaub ntawv txhawb nqa - cov khoom xyaw zais cia hauv ntau lub tshuab luam ntawv hlau - yog tsim los luam cov khoom siv uas tuaj yeem tshem tawm lossis "evaporated" los ntawm tes, qhib lub qhov rooj rau lwm yam sab hauv uas tsis tuaj yeem rov ua dua.
Rapidia tau ua lag luam tau plaub xyoos lawm thiab, qhov tseeb, nyuam qhuav pib xwb. "Lub tuam txhab siv sijhawm los kho tej yam," Gelbart hais.
Txog niaj hnub no, nws thiab nws pab neeg tau siv tsib lub tshuab, suav nrog ib qho ntawm Selkirk Technology Access Center (STAC) hauv British Columbia. Tus kws tshawb fawb Jason Taylor tau siv lub tshuab txij li thaum kawg Lub Ib Hlis thiab tau pom ntau qhov zoo dua li ntau lub tshuab luam ntawv STAC 3D uas twb muaj lawm.
Nws tau hais tias lub peev xwm "ua kua nplaum ua ke nrog dej" cov khoom nyoos ua ntej sintering muaj peev xwm zoo heev. Nws kuj paub txog cov teeb meem cuam tshuam nrog kev tshem roj, suav nrog kev siv thiab pov tseg cov tshuaj lom neeg. Txawm hais tias cov ntawv cog lus tsis qhia tawm tiv thaiv Taylor los ntawm kev qhia cov ntsiab lus ntawm nws txoj haujlwm nyob ntawd, nws thawj qhov project sim yog qee yam uas peb ntau tus yuav xav txog: tus pas luam tawm 3D.
"Nws zoo meej," nws hais nrog luag nyav. "Peb ua tiav lub ntsej muag, tho qhov rau lub qhov, thiab kuv siv nws tam sim no. Peb zoo siab rau qhov zoo ntawm kev ua haujlwm nrog lub kaw lus tshiab. Ib yam li txhua qhov sintered, muaj qee qhov shrinkage thiab txawm tias me ntsis ntawm misalignment, tab sis lub tshuab txaus. Tsis tu ncua, peb tuaj yeem them rau cov teeb meem no hauv kev tsim qauv.
Daim Ntawv Tshaj Tawm Ntxiv tsom mus rau kev siv cov thev naus laus zis tsim khoom ntxiv hauv kev tsim khoom tiag tiag. Cov chaw tsim khoom niaj hnub no siv 3D luam ntawv los tsim cov cuab yeej thiab cov khoom siv, thiab qee tus txawm siv AM rau kev tsim khoom ntau. Lawv cov dab neeg yuav raug nthuav tawm ntawm no.