Cov khoom siv luam ntawv tam sim no muaj rau SLS thev naus laus zis suav nrog nylon hmoov, PS hmoov, PP hmoov, hlau hmoov, ceramic hmoov, resin xuab zeb thiab coated xuab zeb. Vim tias cov ntaub ntawv sib txawv, cov txheej txheem sintering tshwj xeeb kuj txawv.
1. Sintering txheej txheem ntawm cov ntaub ntawv polymer hmoov
Siv cov khoom siv polymer hmoov ua piv txwv. Cov txheej txheem sintering ntawm cov khoom no tuaj yeem muab faib ua peb theem: pretreatment, hmoov txheej sintering stacking thiab tom qab kho:
①Qhov kev ua ua ntej yog tsuas yog siv cov software tsim los tsim cov qauv peb-dimensional CAD, thiab tom qab ntawd nkag mus rau cov ntaub ntawv zoo li qub STL rau hauv cov hmoov laser sintering ceev prototyping system tom qab hloov dua siab tshiab.
② theem thib ob yog cov hmoov txheej laser sintering stacking: cov cuab yeej teeb tsa cov kev tsim tshwj xeeb raws li cov yam ntxwv ntawm tus qauv, thiab cov cuab yeej tau ua tiav cov txheej txheem los ntawm txheej hmoov sintering stacking txheej txheem ntawm tus qauv. Tom qab tsis siv neeg sintering ntawm tag nrho cov laminates tiav, cov qauv tsim yuav tsum tau txias rau 40 ° C hauv lub tog raj kheej, thiab cov qauv raug coj tawm rau kev ua haujlwm tom qab.
②Post-processing: Vim hais tias lub zog ntawm cov qauv tsim muaj zog heev, nws yog tsim nyog los infiltrate ciab los yog resin rau ntxiv dag zog rau lub sij hawm tag nrho cov txheej txheem tom qab.
2. Indirect sintering txheej txheem ntawm hlau qhov chaw
Cov txheej txheem indirect sintering ntawm hlau qhov chaw yog muab faib ua peb theem: zus tau tej cov SLS prototype qhov chaw, zus tau tej cov hmoov sintered qhov chaw, thiab tom qab kev kho mob ntawm hlau infiltration.
Kev tsim cov qauv SLS suav nrog CAD qauv, txheej slicing, laser sintering, thiab prototypes. Tus yuam sij rau theem no yog yuav ua li cas xaiv cov hmoov nplej uas tsim nyog thiab cov txheej txheem ua tiav kom ua tiav cov qauv tsim. Lub" xim av qhov chaw" Cov txheej txheem ntau lawm yog qhov thib ob sintering (800 ° C) thiab thib peb sintering (1080 ° C). Tus yuam sij rau theem no yog tias cov organic impurities nyob rau hauv burnt-tawm qauv tau txais ib tug hlau qauv nrog ib tug kuj yog cov duab thiab lub zog. lub cev. Cov txheej txheem ntawm hlau infiltration theem yog theem nrab sintering (800 ° C)-tertiary sintering (1080 ° C)-hlau infiltration-hlau qhov chaw. Tus yuam sij rau theem no yog xaiv cov khoom tsim nyog infiltration thiab cov txheej txheem kom tau txais cov hlau denser.
3. Kev tsim khoom ncaj qha ntawm cov khoom siv hlau los ntawm cov txheej txheem SLS
Cov txheej txheem kev tsim khoom ncaj qha ntawm cov hlau qhov chaw ntawm cov txheej txheem SLS yog: CAD qauv-txheej hlais-laser sintering (SLS)-RP qauv qauv-hlau qhov chaw.
4. Cov yam ntxwv cuam tshuam rau tus qauv raug hauv cov txheej txheem SLS
Nyob rau hauv cov txheej txheem ntawm kev tsim cov qauv siv cov txheej txheem SLS, muaj ntau yam uas yooj yim cuam tshuam qhov tseeb ntawm cov qauv qauv, xws li SLS cov khoom raug yuam kev, CAD qauv slicing yuam kev, scanning txoj kev, hmoov hais, ambient kub, laser zog, scanning ceev. , scanning nrug, Ib txheej tuab thiab lwm yam ntawm lawv, cov txheej txheem sintering tsis muaj kev cuam tshuam zoo rau qhov raug thiab lub zog. Tsis tas li ntawd, qhov tsis sib xws preheating tuaj yeem ua rau qhov tsis zoo ntawm cov qauv.
① Laser fais fab tuag: Nrog rau qhov nce ntawm lub zog laser, qhov loj me yuam kev nce nyob rau hauv cov kev taw qhia zoo, thiab cov kev nce nyob rau hauv lub thickness kev taw qhia yog loj dua qhov me me yuam kev nyob rau hauv dav kev taw qhia.
② Scanning ceev: Thaum lub scan ceev nce, qhov me me yuam kev txo qis hauv qhov kev taw qhia tsis zoo, thiab qhov kev siv qis dua.
③ Sintering nrug: Raws li qhov ntsuas qhov deb nce, qhov yuam kev loj yuav txo qis hauv qhov tsis zoo.
④ Ib txheej tuab: Raws li cov tuab ntawm ib txheej nce, lub zog txo qis, thiab qhov kev ua yuam kev me me yuav txo qis hauv kev tshuaj xyuas.