1- Kev nqis peev Casting yog dab tsi?
Kev nqis peev casting, uas tseem paub tias poob ciab casting lossisprecision casting, yog hais txog kev tsim cov ceramic nyob ib ncig ntawm cov qauv siv quav ciab los tsim cov pwm ntau lossis ib feem kom tau txais cov hlau molten. Cov txheej txheem no siv cov txheej txheem txhaj tshuaj molded siv quav ciab qauv kom ua tiav cov ntaub ntawv nyuaj nrog qhov tshwj xeeb ntawm qhov zoo. Txhawm rau tsim cov pwm, cov qauv siv quav ciab, lossis pawg ntawm cov qauv, yog dipped rau hauv cov khoom siv ceramic ob peb zaug los tsim lub plhaub tuab. Cov txheej txheem de-wax yog tom qab ntawd ua raws li lub plhaub qhuav txheej txheem. Cov wax-tsawg ceramic plhaub yog ces tsim. Molten hlau yog tom qab ntawd nchuav rau hauv cov kab noj hniav hauv cov kab noj hniav los yog pawg, thiab ib zaug khoom thiab txias, lub plhaub ceramic tau tawg tawm kom pom cov khoom siv hlau zaum kawg.Precision peev castingstuaj yeem ua tiav qhov tseeb tshwj xeeb rau ob qho tib si me thiab loj casting qhov chaw hauv ntau yam khoom siv.
2- Dab tsi yog qhov zoo ntawm kev nqis peev Casting?
✔ Zoo heev thiab du nto tiav
✔ Tight dimensional kam rau ua.
✔ Cov duab sib txawv thiab sib txawv nrog kev tsim qauv yooj yim
✔ Muaj peev xwm nrum cov phab ntsa nyias yog li qhov sib zog ua haujlwm
✔ Kev xaiv dav ntawm cov hlau cam thiab alloys (ferrous thiab non-ferrous)
✔ Draft tsis tas yuav tsum muaj nyob rau hauv cov pwm tsim.
✔ Txo qhov xav tau rau kev ua haujlwm thib ob.
✔ Cov khoom siv tsawg tsawg.
3- Cov kauj ruam ntawm kev nqis peev Casting yog dab tsi?
Thaum lub sij hawm peev casting txheej txheem, ib tug siv quav ciab qauv yog coated nrog ib tug ceramic khoom, uas, thaum hardened, txais lub internal geometry ntawm qhov xav tau casting. Feem ntau, ntau qhov chaw raug nrum ua ke rau kev ua haujlwm siab los ntawm kev txuas ib tus qauv siv quav ciab rau hauv nruab nrab cov quav ciab hu ua sprue. Cov wax melted tawm ntawm tus qauv - uas yog vim li cas nws tseem hu ua txoj kev poob ciab - thiab molten hlau yog poured rau hauv kab noj hniav. Thaum cov hlau solidifies, lub ceramic pwm yog shaken tawm, tawm hauv lub ze net zoo li qhov xav tau casting, ua raws li kev ua tiav, kuaj thiab ntim.
4- Kev nqis peev Castings siv rau dab tsi?
Peev castings yog dav siv nyob rau hauvtwj thiab li qubtsheb, tsheb,hydraulics, forklift tsheb thiab lwm yamkev lag luam. Vim tias lawv qhov tshwj xeeb casting kam rau ua thiab ua tiav zoo, cov khoom siv pov tseg ploj tau siv ntau dua. Tshwj xeeb tshaj yog, covstainless hlau peev castingsua lub luag haujlwm tseem ceeb hauv kev tsim cov nkoj thiab nkoj vim lawv muaj zog tiv thaiv xeb.
5- Dab tsi Casting kam rau koj qhov Foundry ncav cuag los ntawm kev nqis peev Casting?
Raws li cov ntaub ntawv sib txawv siv los ua lub plhaub, cov peev txheej tuaj yeem muab faib ua silica sol casting thiab dej iav casting. silica sol peev txheej txheej txheem casting muaj qhov zoo dua Dimensional Casting Tolerances (DCT) thiab Geometrical Casting Tolerances (GCT) dua li cov txheej txheem iav dej. Txawm li cas los xij, txawm tias los ntawm tib txheej txheem casting, Qib Siab Siab yuav txawv ntawm txhua qhov cam khwb cia hlau vim lawv ntau yam castability.
Pebpeev casting foundryxav nrog koj tham yog tias koj muaj lus thov tshwj xeeb ntawm qhov yuav tsum tau muaj kev zam txim. Ntawm no yog cov hauv qab no yog cov qib tolerances uas peb tuaj yeem ncav cuag ob qho tib si los ntawm silica sol casting thiab dej iav casting txheej txheem cais:
✔ DCT Qib los ntawm Silica Sol Lost Wax Casting: DCTG4 ~ DCTG6
✔ DCT Qib los ntawm Dej iav Poob Wax Casting: DCTG5 ~ DCTG9
✔ GCT Qib los ntawm Silica Solt Wax Casting: GCTG3 ~ GCTG5
✔ GCT Qib los ntawm Dej iav Poob Wax Casting: GCTG3 ~ GCTG5
6- Dab tsi yog Qhov Loj Li Cas ntawm Kev Lag Luam Castings?
Kev nqis peev castings tuaj yeem tsim nyob rau hauv tag nrho cov alloys los ntawm ib feem ntawm ib ooj, rau kev kho hniav braces, mus rau ntau tshaj 1,000 lbs. (453.6 kg) rau complex aircraft engine qhov chaw. Cov khoom me me tuaj yeem muab pov rau ntawm ntau pua ntawm ib tsob ntoo, thaum hnyav castings feem ntau yog tsim nrog ib tus ntoo. Qhov hnyav txwv ntawm kev nqis peev casting nyob ntawm cov khoom siv pwm ntawm lubkev npaj castingt. Cov cuab yeej cam khwb cia qhov hnyav txog li 20 lbs. (9.07 Kg). Txawm li cas los xij, ntau lub tsev hauv tsev tau nce lawv lub peev xwm los ncuav qhov loj, thiab cov khoom hauv 20-120-lb. Qhov ntau (9.07-54.43-kg) tau dhau los ua ntau. Ib qho piv txwv feem ntau siv los tsim kev nqis peev casting yog 3: 1-rau txhua 1-lb. (0.45-kg) ntawm casting, yuav tsum muaj 3 lbs. (1.36 kg) rau tsob ntoo, nyob ntawm qhov tsim nyog tawm los thiab qhov loj ntawm cov khoom. Cov ntoo ib txwm yuav tsum loj dua qhov sib xyaw, thiab qhov sib piv ua kom ntseeg tau tias thaum lub sij hawm casting thiab solidification txheej txheem, cov pa roj thiab ntsws yuav xaus rau hauv tsob ntoo, tsis yog lub casting.
7- Dab tsi ntawm Deg tiav yog tsim nrog kev nqis peev Casting?
Vim hais tias lub plhaub ceramic yog sib sau ua ke nyob ib ncig ntawm tus qauv tsim los ntawm kev txhaj tshuaj rau hauv cov txhuas polished, qhov kawg casting tiav yog zoo heev. A 125 rms micro tiav yog tus qauv thiab txawm tias qhov ua tiav zoo dua (63 lossis 32 rms) tuaj yeem ua tau nrog kev ua haujlwm tom qab cam khwb cia theem nrab. Txhua tus neeg hlau casting chaw muaj lawv tus kheej cov qauv rau qhov chaw blemishes, thiab cov neeg ua haujlwm thiab cov kws tsim qauv / cov neeg siv khoom yuav sib tham txog cov peev txheej no ua ntej qhov kev txiav txim raug tso tawm. Qee cov qauv yog nyob ntawm qhov kawg ntawm kev siv thiab qhov kawg ntawm cov khoom kom zoo nkauj.
8- Puas yog Kev nqis peev Castings kim?
Vim yog cov nqi thiab kev ua haujlwm nrog cov pwm, peev castings feem ntau muaj cov nqi siab dua li forged qhov chaw lossisxuab zeb castingthiab mus tas li pwm casting txoj kev. Txawm li cas los xij, lawv ua rau tus nqi siab dua los ntawm kev txo qistshuabua tiav los ntawm as-cam khwb cia ze-net-shape tolerances. Ib qho piv txwv ntawm qhov no yog kev tsim kho tshiab hauv tsheb rocker caj npab, uas tuaj yeem raug cam khwb cia nrog zoo tsis muaj machining tsim nyog. Ntauhlau qhov chawuas yuav tsum tau milling, tig, drilling thiab sib tsoo kom tiav tuaj yeem ua lag luam nrum nrog tsuas yog 0.020-0.030 cov khoom tiav. Tsis tas li ntawd, kev nqis peev castings yuav tsum muaj qhov tsawg kawg nkaus cov kaum sab xis kom tshem tawm cov qauv ntawm cov cuab yeej; thiab tsis muaj qhov tsim nyog los tshem tawm cov hlau castings los ntawm lub plhaub peev. Qhov no tuaj yeem tso cai rau castings nrog 90-degree lub kaum sab xis tsim los tsis muaj kev siv tshuab ntxiv kom tau txais cov ces kaum.
9- Cov cuab yeej siv thiab cov qauv dab tsi yog qhov yuav tsum tau ua rau poob ciab Casting?
Txhawm rau tsim cov qauv siv quav ciab, yuav tsum tau ua ib qho kev sib cais-cav hlau tuag (nrog cov duab ntawm qhov kawg casting) yuav tsum tau ua. Nyob ntawm qhov nyuaj ntawm cov casting, ntau yam kev sib txuas ntawm cov hlau, ceramic lossis soluble cores tuaj yeem ua haujlwm kom tso cai rau qhov kev xav tau. Feem ntau cov cuab yeej rau peev casting nqi ntawm $ 500- $ 10,000. Cov qauv nrawm (RP), xws li lub tso suab lithography (SLA) qauv, kuj tuaj yeem siv tau. Cov qauv RP tuaj yeem tsim nyob rau hauv cov xuab moos thiab coj mus rau qhov tseeb ntawm ib feem. Cov RP qhov chaw tom qab ntawd tuaj yeem sib sau ua ke thiab coated nyob rau hauv ceramic slurry thiab hlawv tawm tso cai rau lub hollow kab noj hniav kom tau ib tug qauv peev cam khwb cia khoom. Yog tias qhov casting loj dua lub hnab ntawv tsim, ntau qhov RP sub-component tuaj yeem ua tau, sib sau ua ke rau hauv ib feem, thiab nrum kom ua tiav cov qauv qauv kawg. Kev siv RP qhov chaw tsis zoo rau kev tsim khoom siab, tab sis tuaj yeem pab pawg tsim qauv tshuaj xyuas ib feem kom raug thiab daim ntawv, haum thiab ua haujlwm ua ntej xa cov cuab yeej txiav txim. RP qhov chaw tseem tso cai rau tus tsim qauv los sim nrog ntau qhov kev teeb tsa lossis lwm cov alloys yam tsis muaj nqi ntau ntawm cov cuab yeej siv.
10- Puas muaj Porosity thiab/lossis Shrinkage Defects nrog Peev Castings?
Qhov no nyob ntawm seb qhov chaw ua haujlwm hlau ua kom cov pa tawm ntawm cov hlau molten thiab ceev npaum li cas cov khoom sib zog. Raws li tau hais ua ntej, ib tsob ntoo tsim kom zoo yuav tso cai rau cov porosity rau hauv tsob ntoo, tsis yog qhov casting, thiab lub plhaub kub kub ceramic tso cai rau kom txias dua. Tsis tas li ntawd, lub tshuab nqus tsev-kev nqis peev cam khwb cia khoom tshem tawm cov hlau molten ntawm gassing tsis xws luag raws li huab cua raug tshem tawm. Kev nqis peev castings yog siv rau ntau daim ntawv thov tseem ceeb uas yuav tsum tau x-ray thiab yuav tsum ua kom tau raws li cov qauv zoo meej. Kev ncaj ncees ntawm kev nqis peev casting tuaj yeem ua tau zoo dua rau cov khoom tsim los ntawm lwm txoj hauv kev.
11- Dab tsi hlau thiab Alloys tuaj yeem nchuav los ntawm kev nqis peev Casting ntawm koj qhov Foundry?
Yuav luag feem ntau ntawm cov ferrous thiab nonferrous hlau thiaballoystuaj yeem raug pov los ntawm kev nqis peev casting txheej txheem. Tab sis, ntawm peb poob ciab casting foundry, peb mas cam khwb ciacarbon hlau, hlau alloy, stainless hlau,super duplex stainless hlau, grey cam khwb cia hlau, ductile cam khwb cia hlau,aluminium alloys thiab tooj dag. Tsis tas li ntawd, qee qhov kev siv yuav tsum tau siv tshwj xeeb lwm yam alloys siv feem ntau nyob rau hauv ib puag ncig hnyav. Cov hlau no, xws li Titanium thiab Vanadium, ua tau raws li qhov xav tau ntxiv uas yuav tsis ua tiav nrog cov qauv Aluminium alloys. Piv txwv li, Titanium alloys feem ntau yog siv los tsim turbine hniav thiab vanes rau aerospace xyaw. Cobalt-base thiab Nickel-base alloys (nrog ntau yam ntawm cov ntsiab lus thib ob ntxiv kom ua tiav qhov tshwj xeeb lub zog-lub zog, corrosion-lub zog thiab kub-resistant zog), yog lwm hom cam khwb cia hlau.
12- Vim li cas Investment Casting tseem hu ua Precision Casting?
Lub peev casting tseem hu ua precision casting vim nws muaj qhov zoo dua thiab qhov tseeb dua li lwm cov txheej txheem casting. Tshwj xeeb tshaj yog rau cov txheej txheem silica sol casting, qhov tiav castings tuaj yeem ncav cuag CT3 ~ CT5 hauv geometrical casting kam rau ua thiab CT4 ~ CT6 nyob rau hauv qhov ntev casting kam rau ua. Rau cov casings uas tsim los ntawm peev txheej txheej txheem casting, yuav muaj tsawg dua lossis txawm tias tsis tas yuav ua cov txheej txheem machining. Rau qee qhov, kev nqis peev casting tuaj yeem hloov cov txheej txheem machining ntxhib.
13- Vim Li Cas Poob Wax Casting hu ua Peev Casting?
Lub peev casting tau txais nws lub npe vim hais tias cov qauv (wax replicas) tau nqis peev nrog cov khoom siv refractory puag ncig thaumtxheej txheem casting. Qhov "invested" ntawm no txhais tau hais tias nyob ib puag ncig. Cov wax replicas yuav tsum tau nqis peev (sib puag ncig) los ntawm cov khoom siv refractory kom tiv taus qhov kub siab ntawm cov hlau ntws molten thaum lub sij hawm casting.