Precision Casting Los Ntawm Txoj Kev Dewaxing

Nta thiab Qhov Zoo
(1) Qhov siab tshaj plaws txwv ntev ntawm cov casting yog 700mm, thiab qhov yooj yim ntev yog tsawg dua 200mm. Qhov hnyav tshaj plaws ntawm cov cam khwb cia yog hais txog 100 kg, feem ntau tsawg dua 10 kg.
(2) Qhov ntev kam rau ua ntawm casting yog 20mm ± 0.13mm, 10{{10}}mm ± 0. 30mm, 200mm ± 0.43mm, thaum qhov tseeb ntawm qhov me me tsis yooj yim kom ncav cuag tsawg dua ± 0.10mm. Lub kaum sab xis yog ± 0.5 ~ ± 2.0 degrees, thiab qhov tsawg kawg nkaus thickness ntawm lub casting yog 0.5 ~ 1.5 hli. Lub thickness ntawm lub casting yog hais txog Rmax 4S ~ 12S.
(3) Casting khoom yuav luag tsis muaj kev txwv, xws li txhuas alloy, magnesium alloy, titanium alloy, titanium alloy, tooj liab alloy, txhua yam hlau, cobalt-based thiab npib tsib xee-raws li kub-resistant alloy, cov ntaub ntawv nyuaj.
(4) Kev tsim cov khoom ua haujlwm nrog cov duab nyuaj, qhov loj me zoo, txiav tsawg dua thiab ua tiav.
(5) Txuag cov khoom pov tseg, thiab tuaj yeem tsim ua ntau.
Dewaxed precision castings yog dav siv nyob rau hauv dav hlau cav, roj turbines, chav turbines, aircraft qhov chaw, tsheb, internal combustion engine, tsheb, zaub mov machinery, tshuab luam ntawv, ntawv ua machinery, compressors, valve qhov chaw, neeg hlau, meters, tshuab xaws, riam phom , kev lag luam tshuab, thiab lwm yam tshuab qhov chaw.
2-2 Txheej txheem
Muaj ob hom dewaxing casting txoj kev: khoom pwm (Solid Pwm) txoj kev thiab ceramic plhaub pwm (Ceramic Plhaub Mould) txoj kev, tom kawg yog txoj kev txhim kho ntawm yav dhau los.
Txoj kev tuag cov khoom ua pwm zoo ib yam li qhov kawg casting loj tom qab txiav txim siab lub condensation shrinkage ntawm cam khwb cia pwm thiab condensation shrinkage ntawm cov hlau molten. Lub melted ciab yog poured rau hauv pwm ua los ntawm hlau los yog silica gel. Tom qab tshem tawm cov wax hom, soak cov hmoov refractory thiab binder. Tom qab dripping, sprinkle coarse refractory thiab qhuav nws. Muab tso rau hauv lub cam khwb cia, sau cov hmoov nrog binder, thiab ces qhuav. Tom qab ntawd sov nws kom yaj cov quav ciab tawm ntawm pwm. Tshav kub cov pwm ntawm qhov kub thiab txias, hlawv ib qho me me ntawm cov khoom seem thiab ua kom nws lub zog, thiab tom qab ntawd txhaj cov hlau flux.
Ceramic plhaub pwm txoj kev kom txog rau thaum hom wax yog tib yam li cov khoom pwm, tab sis tom qab slurry thiab xuab zeb (los yog ntab xuab zeb), tsis yog pwm ua haujlwm, tab sis rov qab mus rau slurry thiab xuab zeb kom txog rau thaum lub plhaub tuab ntawm predetermined. Qhuav, cua sov, melting tawm ntawm ciab, kub kub thiab ces pouring, txoj kev no yog dav siv nyob rau hauv lub tam sim no dewaxing precision casting kev lag luam, vim hais tias nws muaj cov nram qab no zoo:
(1) Kev ruaj ntseg zoo
(2) Tsawg siv cov khoom siv refractory
(3) Lub teeb yuag, nqa tau yooj yim, kov, thiab ua cov castings loj
(4) Cov txheej txheem tsim khoom tuaj yeem ua haujlwm ib nrab kom txuag tau cov neeg ua haujlwm thiab txhim kho tus nqi ntau lawm
(5) Tsawg tus nqi tsim khoom
(6) Ceramic plhaub pwm yog qhov nyias nyias, thiab qhov txias ntawm qhov casting tom qab nchuav yog qhov siab thiab tsis sib xws, yog li nws cov khoom siv tshuab zoo dua.
(A) Master Qauv (Master Pattern)
Cov duab ntawm lub ntsiab qauv zoo ib yam li cov khoom kawg. Lub condensation thiab shrinkage ntawm cov quav ciab, thiab cua sov thiab expansion thiab condensation thiab shrinkage ntawm lub casting pwm yuav tsum tau txiav txim siab nyob rau hauv lub casting hlau. Piv txwv li, thaum lub shrinkage tus nqi ntawm wax hom yog 1.2 feem pua, qhov thermal expansion tus nqi ntawm casting pwm yog 0.7 feem pua, thiab shrinkage tus nqi ntawm casting hlau yog 1.7 feem pua, qhov loj nce tus nqi ntawm lub ntsiab qauv. yog 2.2 feem pua, thiab cov khoom siv feem ntau yog aluminium alloy thiab tooj liab