Thaum koj hnov 'ceramic core rau peev casting', feem ntau xav tias nws tsuas yog qhov chaw, ib qho kev txi. Qhov ntawd yog thawj qhov kev xav tsis zoo. Nyob rau hauv kev muaj tiag, nws yog tus kws kes duab vajtse ntawm internal complexity. Cov tub ntxhais tsim tsis zoo tuaj yeem tawg, hloov pauv, lossis ua tsis tiav, tshem tawm tag nrho cov turbine hniav lossis kho mob cog. Kuv tau pom cov khw muag khoom liam cov hlau lossis lub plhaub, tsuas yog nrhiav cov hauv paus hauv paus yog ib qho tseem ceeb uas tsis tuaj yeem tiv taus qhov thermal shock ntawm superalloy ncuav. Nws tsis yog ib feem; nws yog kev cog lus rau precision los ntawm qhov pib ntawm lub voj voog tsim.
Cov khoom tsis yog Ceramic nkaus xwb
Hu ua a ceramic core zoo li hu ua steel 'hlau'. Lub composition yog txhua yam. Silica-based cores muaj ntau, tab sis rau high-nickel alloys nchuav saum 1500 ° C, koj tab tom saib alumina lossis zirconia-based systems. Qhov txawv tsis yog qhov ntsuas kub xwb. Lub coefficient ntawm thermal expansion (CTE) yuav tsum tau engineered kom phim lub plhaub puag ncig. Ib qho tsis sib xws, txawm tias me ntsis, ua rau muaj kev ntxhov siab tawg thaum lub caij txias. Kuv nco qab qhov project rau ib cobalt-raws li alloy manifold qhov twg peb siv ib tug off-the-shelf alumina core. Nws zoo nkaus li zoo meej tom qab dewax, tab sis tom qab nchuav, micro-cracks hauv cov tub ntxhais tau txhais ua qhov tawg ntawm qhov nrum hauv cov channel. Cov khoom tseem ceeb yog 'zoo', tab sis nws tsis yog 'txoj cai'.
Tom qab ntawd muaj lub binder system. Nws tsis yog hais txog tuav cov nplej zom ua ke thaum lub xeev ntsuab. Nws yog hais txog kev tswj lub cev qhuav dej thaum tua hluav taws los teeb tsa lub zog kawg thiab, qhov tseem ceeb, tswj kev sib cais hauv cov da dej caustic tom qab. Qee cov silica-based cores siv cov hlua khi uas tawm ntawm qhov tsis yooj yim, cov iav iav, ua rau lawv yooj yim los tuav kev puas tsuaj. Qhov kev txawj ntse tiag tiag yog tsim cov khoom siv uas muaj zog txaus kom muaj sia nyob lub plhaub tsev thiab nchuav, tseem ua rau cov tshuaj tsis muaj zog txaus kom raug tshem tawm yam tsis muaj kev cuam tshuam kev siv tshuab uas tuaj yeem ua rau cov phab ntsa nyias nyias.
Qhov no yog qhov kev paub nrog cov alloys tshwj xeeb them tawm. Ua haujlwm nrog Nickel-raws li alloysPiv txwv li, koj paub tias lawv muaj qhov sib txawv ntev ntev thiab cov dej ntws siab. Cov tub ntxhais xav tau qhov tshwj xeeb kub lub zog los tiv thaiv cov hlau nkag thiab yaig ntev dua. Lub hom phiaj tseem ceeb ntawm lub hom phiaj yuav ntxuav tawm, tawm hauv qhov ntxhib sab hauv uas tua cov cua ntws hauv cov khoom siv turbine. Nws yog qhov tsis ua haujlwm ntsiag to - koj tsuas pom nws thaum lub sijhawm X-ray lossis ntsuas ntws.
Tsim: Qhov twg Txoj Kev Ua Raws Li Lub Hauv Paus Foundry
CAD qauv zoo meej. Cores tsis yog. Qhov sib txawv loj tshaj plaws yog nyob rau hauv lub kaum sab xis thiab kev txhawb nqa. Cov neeg tsim qauv feem ntau xav kom xoom cov qauv ntawm cov yam ntxwv sab hauv kom ua kom zoo tshaj aerodynamic lossis hydraulic efficiency. Tab sis ib tug tub ntxhais yog ib yam khoom ntawm lub cev uas yuav tsum tau ejected los ntawm ib tug tuag los yog nias rau hauv ib lub cuab tam. Peb tawm tsam qhov no tau ntau xyoo. Qhov kev sib haum xeeb feem ntau yog qhov tsawg kawg nkaus, hais 0.5 mus rau 1 degree, ua ke nrog kev siv tswv yim ntawm cov ntawv luam tawm - cov kev txuas ntxiv uas nrhiav thiab thauj cov tub ntxhais hauv cov qauv siv quav ciab thiab tom qab lub plhaub.
Kuv nco ntsoov ib tug complex roj nozzle tsim rau aerospace. Cov ceramic core muaj ob peb nyias, cantilevered caj npab. Hauv kev simulation, nws ruaj khov. Nyob rau hauv kev xyaum, thaum lub sij hawm txhaj tshuaj ntawm wax qauv nyob ib ncig ntawm nws, lub siab ua rau deflection. Qhov tshwm sim? Phab ntsa thickness variation tshaj spec. Kev kho tsis yog ib qho tseem ceeb zoo dua; nws tau rov tsim kho lub rooj vag txhaj tshuaj thiab ntxiv cov kev txhawb nqa ceramic ib ntus (tom qab ntawd tshem tawm hauv kev sib tsoo) txhawm rau txhawm rau lub hauv paus ntawm cov txheej txheem ntawd. Nws ntxiv tus nqi thiab ib kauj ruam, tab sis nws txuag tau ib feem. Qhov no yog hom peev casting nuance koj tsis pom hauv phau ntawv.
Lwm qhov ua rau mob taub hau yog core venting. Raws li cov hlau molten nyob rau hauv kab noj hniav, huab cua nyob rau hauv lub tub ntxhais yuav tsum khiav. Yog tias nws ua tsis tau, rov qab-siab tiv thaiv kev ua tiav, lossis roj tau daig hauv qhov casting. Peb xyaum cov qhov me me hauv qhov tsis tseem ceeb ntawm cov tub ntxhais kawm, tab sis lawv qhov kev tso kawm yog kev kos duab. Ntau dhau ua rau lub hauv paus tsis muaj zog; tsawg dhau ua rau muaj teeb meem. Nws yog ib qho kev txiav txim hu raws li cov tub ntxhais lub ntim thiab geometry, feem ntau refined los ntawm kev sim pours.
Kev koom tes nrog tus kws tsim khoom tshwj xeeb
Qhov no tsis yog ib yam khoom uas koj xaj los ntawm catalog. Nws yog txheej txheem kev tsim kho. Tau ntau xyoo, peb tau nce siab rau cov kws tshaj lij. Ib lub tuam txhab zoo li Qingdao Qiangsenyuan Technology Co., Ltd. (QSY) coj tus nqi tshwj xeeb ntawm no. Nrog lawv 30 xyoo nyob rau hauv plhaub molding thiab peev casting, lawv to taub tag nrho cov txheej txheem saw. Thaum koj tham txog tus qauv tsim nrog lawv, lawv tsis yog xav txog qhov tseem ceeb ntawm kev sib cais. Lawv tab tom xav txog yuav ua li cas nws cuam tshuam nrog lawv lub plhaub, lawv cov dewaxing autoclave, lawv cov kev coj ua rau stainless hlau vs ib tshwj xeeb alloy.
Kuv tau mus xyuas lawv qhov chaw ib zaug, tshuaj xyuas qhov project rau lub cev valve hauv duplex stainless hlau. Lub hauv paus muaj qhov tob, nqaim hnab ris. Lawv tus engineer tam sim ntawd taw qhia txog qhov muaj peev xwm tshem tawm qhov teeb meem. Lawv qhov kev tawm tswv yim yog hloov pauv me ntsis ntawm lub hnab tshos qhov sib piv thiab qhia meej cov txheej txheem ntxeem tau ntau dua hauv thaj chaw tshwj xeeb kom nrawm cov tshuaj lom neeg tawg. Qhov ntawd yog kev xav integrated. Nws los ntawm kev muaj CNC machining muaj peev xwm nyob hauv tsev ib yam nkaus-lawv tuaj yeem hloov kho sai sai rau cov cuab yeej siv rau cov wax core tuag raws li kev tawm tswv yim los ntawm kev sim thawj zaug, ua kom luv luv ntawm txoj kev loj hlob. Koj tuaj yeem pom lawv txoj hauv kev ntawm lawv qhov chaw ntawm https://www.tsingtaocnc.com.
Kev sib raug zoo yog qhov tseem ceeb vim tias tom qab lub hauv paus tau tsim, lub luag haujlwm tsis tas yuav xaus. Muaj thawj tsab xov xwm tshuaj xyuas, feem ntau siv CT scan los sib piv cov tub ntxhais uas raug rho tawm haujlwm rau CAD qauv, kuaj xyuas qhov tsis sib xws. Tom qab ntawd muaj cov txheej txheem ntawm kev kho cov tub ntxhais mus rau hauv lub wax txhaj tshuaj tuag. Tus kws tsim khoom tshwj xeeb feem ntau yuav muab cov khoom siv los yog cov txheej txheem ntxaws. Ib tus neeg muab khoom tseem ceeb tsuas yog xa ib lub thawv ntawm cov khoom tawg yooj yim.
Failure yog Data Point
Koj tsis tau ua haujlwm nrog ceramic cores mus txog rau thaum koj tau muaj qhov tsis txaus ntseeg. Ib tug uas sticks nrog kuv yog rau ib tug loj industrial twj impeller. Cov cores yog loj thiab intricate. Lawv raug rho tawm haujlwm zoo nkauj thiab muaj sia nyob lub tsev plhaub. Lub ncuav ntawm nrum hlau mus smoothly. Qhov teeb meem tshwm sim thaum shakeout. Lub hauv paus tsuas yuav tsis tawm los. Peb sim ncua leaching, thermal shock, txawm ultrasonic da dej. Fragments tseem fused nyob rau hauv cov kab lus. Tom qab-mortem qhia qhov teeb meem: cov tub ntxhais binder tau cuam tshuam nrog ib qho impurity nyob rau hauv cov av nplaum siv nyob rau hauv thawj slurry tsho tiv no ntawm lub plhaub, tsim ib tug fused ceramic interface ntawm kub. Cov khoom tseem ceeb tau zoo. Cov khoom siv plhaub tau zoo. Tab sis lawv cov kev sib xyaw ua ke, nyob rau hauv cov xwm txheej tshwj xeeb, yog kev puas tsuaj loj.
Qhov kev ua tsis tiav ntawd tau qhia peb ib txwm ua qhov kev sim ua tau zoo - tua ib qho me me ntawm cov tub ntxhais tiv thaiv lub plhaub slurry tiag tiag uas peb npaj yuav siv, tom qab ntawd kuaj xyuas qhov adhesion. Nws yog ib kauj ruam yooj yim uas tam sim no tus qauv hauv peb cov txheej txheem. Nws kuj qhia kuv tias hauv peev casting, txhua lub ntsiab yog ib feem ntawm lub system. Koj tsis tuaj yeem optimize ib qho hauv lub tshuab nqus tsev.
Lwm qhov ua tau zoo, ntsiag to tsis ua haujlwm yog qhov dav dav. Ib qho tseem ceeb yuav zoo meej rau thawj 100 daim, tom qab ntawd koj pib pom ib qho qauv mus rau qhov siab siab siab. Nws feem ntau yog cov cuab yeej-tus tuag siv los tsim cov wax core-hnav. Los yog nws yuav yog qhov hloov maj mam hloov hauv qhov hluav taws kub cua sov. Kev ntes qhov no yuav tsum muaj kev tswj xyuas cov txheej txheem nruj, ntsuas tsis yog qhov kawg casting, tab sis cov tub ntxhais ceramic ntawm ntau theem. Nws yog tedious, tab sis nws tiv thaiv kev puas tsuaj qeeb.
The Unsung Payoff
Thaum nws tag nrho los ua ke, lub ceramic core yog dab tsi enables tsis yooj yim sua casting. Xav txog lub hollow turbine hniav nrog intricate cua txias raws raws li cov airfoil contour. Tsis muaj lwm txoj hauv kev tuaj yeem ua tiav qhov zoo li-cam khwb cia hauv geometry. Tus nqi tsis yog nyob rau hauv kev tsim ib qho chaw hollow; nws yog nyob rau hauv kev tsim ib tug precisely engineered khiav txoj kev uas tso cai rau lub cav khiav kub, ntau npaum. Qhov ntawd yog qhov uas tus nqi siab ntawm kev tsim thiab tsim cov cores no yog qhov ncaj ncees.
Rau ib lub tuam txhab xws li QSY, uas nws ua hauj lwm spans los ntawm industrial nrum hlau cov khoom siv rau kev ua haujlwm siab cobalt-based alloys, cov thev naus laus zis tseem ceeb yog tus choj ntawm cov kev lag luam no. Cov hauv paus ntsiab lus yog tib yam, tab sis kev ua tiav ntsuas hauv precision thiab cov ntaub ntawv tshawb fawb. Lub peev xwm los tswj cov spectrum nyob rau hauv ib lub ru tsev yog dab tsi cais lub khw ua hauj lwm los ntawm ib tug tiag tiag engineering khub.
Yog li tom ntej no koj saib ntawm qhov kev nqis peev uas nyuaj, nco ntsoov cov pob txha tsis pom sab hauv. Qhov ntawd ceramic core pib raws li ib tug muab tshuaj txhuam, tau zoo li tus, raug rho tawm haujlwm, tuav, ib puag ncig los ntawm wax, coated, raug rho tawm haujlwm dua, poob rau hauv cov hlau molten, thiab thaum kawg dissolves. Nws tag nrho cov hav zoov yog ib qho kev ua ntu zus ntawm qhov tseeb, tsuas yog tawm hauv kab noj hniav zoo meej tom qab. Tau txais txoj cai ntawd yog ib nrab ntawm kev sib ntaus sib tua hauv kev ua ib qho casting uas tsis yog qhov zoo xwb, tab sis kev ya dav hlau tsim nyog, cog-qib, lossis lub hom phiaj tseem ceeb. Nws yeej tsis yog qhov chaw cia xwb.
