Precision casting, feem ntau hu ua peev casting lossis ploj-wax casting, yog ib qho txheej txheem uas tau coj los siv rau ntau pua xyoo thiab tseem yog cov txheej txheem tseem ceeb hauv kev tsim khoom niaj hnub no. Nws koom nrog kev tsim cov ntsiab lus zoo heev thiab raug hlau los ntawm kev ua kom zoo ntawm cov kauj ruam. Cov txheej txheem ua haujlwm hauv precision casting xyuas kom meej tias cov khoom kawg ua tau raws li cov kev cai nruj ntawm ntau yam kev lag luam, suav nrog aerospace, tsheb, kev kho mob, thiab cov hniav nyiaj hniav kub.
Nyob rau hauv lub plawv ntawm precision casting lies lub ploj-wax txheej txheem. Qhov no pib nrog kev tsim cov qauv siv quav ciab, uas yog ib qho kev hloov pauv ntawm qhov xav tau. Cov qauv siv quav ciab yog tom qab ntawd muab tso rau ntawm lub hauv paus sprue thiab coated nrog ib txheej ntawm cov khoom siv refractory, feem ntau yog ceramic slurry. Cov txheej no yog siv ob peb zaug, tsim ib lub plhaub tuab nyob ib ncig ntawm cov qauv siv quav ciab. Lub plhaub yog tom qab ntawd tawv, los ntawm huab cua kom qhuav lossis ci, tsim kom muaj pwm nruj uas muaj cov hlau molten.
Thaum lub plhaub ceramic tau hardened, cov qauv siv quav ciab raug tshem tawm los ntawm cov txheej txheem hu ua dewaxing. Qhov no yog ua tiav los ntawm cua sov lub plhaub mus rau qhov kub uas melts cov quav ciab, tawm hauv qab lub hollow kab noj hniav nyob rau hauv lub plhaub. Lub plhaub dewaxed ces raug rho tawm haujlwm ntawm qhov kub siab dua kom tshem tawm cov khoom seem thiab ntxiv dag zog rau cov khoom siv ceramic.
Cov kauj ruam tom ntej yog nchuav cov hlau molten rau hauv lub plhaub ceramic. Kev xaiv ntawm cov hlau yog nyob ntawm daim ntawv thov thiab cov khoom tsim nyog ntawm qhov kawg. Cov hlau uas siv hauv precision casting muaj xws li stainless hlau, txhuas, tooj dag, thiab tooj dag. Cov hlau molten yog ua tib zoo nchuav rau hauv lub plhaub los ntawm lub rooj vag, sau cov kab noj hniav uas ib zaug nyob los ntawm cov qauv siv quav ciab.
Raws li cov hlau txias thiab solidifies, nws yuav siv sij hawm qhov zoo ntawm cov kab noj hniav, replicating intricate cov ntsiab lus ntawm tus thawj wax qauv. Ceramic plhaub txhawb cov hlau thaum lub sij hawm no solidification txheej txheem, kom ntseeg tau tias ib feem tswj nws cov duab thiab qhov ntev.
Thaum cov hlau tau ua tiav tiav, lub plhaub ceramic raug tshem tawm, feem ntau yog siv los ntawm kev siv tshuab lossis tshuaj lom neeg. Lub resulting hlau ib feem, hu ua ib tug casting, yog ces ntxuav thiab tiav. Qhov no yuav suav nrog tshem tawm cov hlau ntau dhau ntawm lub rooj vag thiab sprues, nrog rau sandblasting lossis polishing kom ua tiav qhov xav tau ntawm qhov chaw tiav.
Cov txheej txheem casting precision tau piav qhia saum toj no yog cov kauj ruam tseem ceeb hauv cov txheej txheem. Txawm li cas los xij, tseem muaj ntau yam kev tshaj lij thiab kev txiav txim siab uas tuaj yeem txhim kho qhov zoo thiab ua haujlwm ntawm precision casting. Piv txwv li, kev siv lub tshuab nqus tsev los yog lub siab casting tuaj yeem txhim kho qhov ntws ntawm cov hlau molten rau hauv pwm, txo qhov porosity thiab txhim kho tag nrho cov qauv kev ncaj ncees ntawm cov casting.
Tsis tas li ntawd, kev txhim kho ntawm CAD / CAM thev naus laus zis tau hloov pauv kev tsim thiab tsim cov qauv siv quav ciab. Cov cuab yeej no tso cai rau kev tsim cov qauv tsim thiab kev sib txuam nrog qhov tseeb tsis tau muaj dua. Kev sib koom ua ke ntawm CAD / CAM nrog precision casting tau txo qis cov khoom lag luam kev loj hlob thiab txo qhov kev xav tau ntawm kev siv tes ua haujlwm.
Ntxiv mus, kev nce qib ntawm cov khoom siv science kuj tau ua lub luag haujlwm tseem ceeb hauv kev txhim kho cov txheej txheem casting precision. Txoj kev loj hlob ntawm cov tshiab alloys thiab hlau nrog superior mechanical zog, corrosion kuj, thiab kub kam rau ua tau broadened ntau yam kev siv rau precision castings.
Precision casting yog txheej txheem kev tsim khoom zoo heev thiab muaj kev sib tw uas tso siab rau kev sib xyaw ua ke ntawm cov txheej txheem ib txwm ua thiab kev nce qib niaj hnub. Cov txheej txheem ploj-wax, nrog rau kev siv cov ntaub ntawv refractory, molten hlau pouring, thiab tom qab ua cov kauj ruam, ua cov tub ntxhais ntawm precision casting. Kev sib koom ua ke ntawm cov txheej txheem siab heev thiab cov ntaub ntawv kev tshawb fawb kev nce qib txuas ntxiv thawb ciam teb ntawm cov khoom siv qub qub no, ua rau kev tsim cov khoom siv hlau ntau dua thiab meej rau ntau yam kev lag luam.