Thaum cov neeg feem coob hnov 'kev cai peev casting', lawv pom ib qho flawless, net-puab qhov ncaj tawm ntawm lub plhaub ceramic, npaj rau kev sib dhos. Cov ntawv qhia thiab cov vev xaib ua rau nws zoo li khawv koob. Qhov tseeb, qhov uas tau them cov nqi thiab ua rau cov neeg siv khoom rov qab los, yog txhua yam hais txog kev tswj hwm qhov tsis pom: qhov cuam tshuam uas tsis nyob hauv phau ntawv qhia rau koj cov kev sib xyaw tshwj xeeb, txoj hauv kev tshwj xeeb cov qauv luam tawm tuaj yeem cuam tshuam tag nrho lub plhaub thaum lub sij hawm dewax, los yog qhov chaw ua tiav kev lag luam tawm thaum koj nyob nraum chasing ob phab ntsa nyias thiab sab hauv. Nws tsis yog tsuas yog ua cov pwm; nws yog hais txog foreseeing tag nrho cov saw ntawm cov txheej xwm los ntawm 3D qauv kom tiav, machined tivthaiv.
Lub Foundation: Nws pib (thiab feem ntau Stumbles) nrog tus qauv
Txhua tus neeg tsom mus rau cov hlau, tab sis thawj kauj ruam tiag tiag yog cov qauv cuab yeej. Kuv tau pom tej yaam num tau derailed ntawm no ntau dua nyob qhov twg. Koj tsis tuaj yeem nqa tus qauv CAD thiab mills tus qauv tuag. Koj yuav tsum siv txoj cai shrink, tab sis qhov twg? Tus nqi luam tawm rau 316 stainless yog qhov pib, tab sis hauv kev xyaum, nws hloov nrog cov geometry. Ib tug ntev, nyias feature yuav txwv shrinkage txawv tshaj ib tug loj seem. Peb tau kawm qhov no nyuaj rau thaum ntxov, ua ib pawg ntawm lub cev valve uas zoo meej rau ntawm CMM tshwj tsis yog rau lub ntsej muag flange tseem ceeb - nws tau tawm los ntawm qhov txaus los ua qhov teeb meem sib khi. Lub alloy shrunk raws li kwv yees, tab sis tus qauv tsis suav rau qhov sib txawv txias. Tam sim no, peb tsim nyob rau hauv cov nyiaj them raws li ib feem topology, tsis yog ib daim pam feem pua.
Tom qab ntawd muaj cov qauv khoom nws tus kheej. Rau qhov ntim qis kev cai peev casting, ceev prototyping zoo li SLA lossis siv quav ciab luam ntawv yog ntxias. Nws ceev. Tab sis rau kev khiav ntawm 50 daim, qhov sib xws ntawm machined aluminium lossis steel tuag yog tsim nyog rau tus nqi pem hauv ntej. Ib daim ntawv luam tawm ntawm lub ntsej muag muaj qhov zoo nkauj, me ntsis stair-step, uas hloov mus rau lub plhaub ceramic thiab tom qab ntawd mus rau cov hlau. Yog tias koj xav tau Ra 63 microinch lossis zoo dua li-cam khwb cia saum npoo, qhov ntawd yog qhov teeb meem. Cov nyiaj khaws cia thawj zaug evaporate nrog cov nqi ntxiv.
Qhov no yog qhov uas tus khub qhov kev paub qhia. Ib lub tuam txhab zoo li Qingdao Qiangsenyuan Technology Co., Ltd. (QSY), nrog lawv peb lub xyoo caum, muaj peev xwm ua tau ntau txhiab tus qauv tuag. Lub tsev qiv ntawv ntawm cov ntaub ntawv keeb kwm hais txog yuav ua li cas cov duab sib txawv coj tus cwj pwm hauv pwm yog qhov tseem ceeb. Nws yog qhov sib txawv ntawm qhov theoretical shrink thiab ib qho pov thawj, tweaked ib qho rau lub turbine hniav piv rau lub twj tso kua mis.
Lub Plhaub Game: Ceramics, Stucco, thiab Lub Sijhawm Qhuav
Lub plhaub tsev txheej txheem yog qhov chaw kos duab raws li kev tshawb fawb. Lub tsho loj slurry yog qhov tseem ceeb rau kev ua kom tiav, tab sis lub tsho tiv no yog rau lub zog. Qhov kev xaiv ntawm stucco - zircon, fused silica, alumino-silicate - nyob ntawm cov alloy qhov kub thiab txias thiab qhov xav tau thermal. Pouring nickel-based superalloy? Koj yuav luag siv lub ntsej muag zirconia-raws li lub tsho tiv no thiab stucco los tiv thaiv cov tshuaj tiv thaiv hlau-pwm. Tab sis qhov ntawd yog kim. Rau ntau daim ntawv thov carbon steel, fused silica system ua haujlwm zoo kawg nkaus thiab txo nqi.
Qhuav lub sij hawm ntawm dips yog ib tug ntsiag to killer ntawm lub sij hawm thiab zoo. Rush nws, thiab koj ntxiab ya raws. Lub zog siab thaum lub sij hawm tom qab kub-kub dewax tuaj yeem tawg lub plhaub ntawm sab hauv tawm. Peb ib zaug poob tag nrho tsob ntoo ntawm aerospace brackets vim tias cov av noo nyob rau hauv chav ziab tsis suav nrog. Cov plhaub tau zoo kawg nkaus kom txog thaum lawv tawg hauv lub dewax autoclave. Tam sim no, peb soj ntsuam ambient tej yam kev mob zoo li cov slurry viscosity.
Plhaub thickness yog lwm qhov kev txiav txim hu. Thicker muaj zog dua, tab sis nws kuj txhais tau tias cov khoom siv ntau dua, lub sij hawm cua sov ntev dua rau pwm ua ntej nchuav, thiab qhov ua kom txias txias dua rau cov hlau. Rau cov txheej txheem nyias-walled, koj xav tau lub plhaub muaj zog los tiv thaiv kev tawg thaum tuav, tab sis koj tsis xav tau lub thermal huab hwm coj uas ua rau kom khov thiab tsim cov teeb meem ntawm cov nplej. Nws yog qhov sib npaug koj kawm los ntawm kev xav, feem ntau los ntawm kev rhuav tshem ob peb lub plhaub los kuaj xyuas qhov permeability thiab lub zog.
Dewax thiab Burnout: Qhov Kev Hloov Tsis Pom Zoo
Dewax tsis yog melting tawm ciab xwb. Niaj hnub no autoclaves siv high-pressure chav kom yaj thiab vaporize nws sai heev. Tus yuam sij yog ceev thiab tswj siab - tau txais cov quav ciab tawm ua ntej nws nthuav txaus kom tawg cov ceramic. Tab sis tom qab dewax, koj muaj lub khoob khoob khoob khoob khoob. Lub voj voog kub hnyiab tom qab ntawd tua hluav taws mus rau thaj tsam 1000 ° C kom hlawv tawm cov khoom seem seem, sinter cov khoom ceramic ua ke kom muaj zog, thiab coj cov pwm mus rau qhov kub thiab txias. Yog tias tus nqi nce nrawm dhau, thermal shock ua rau tawg. qeeb dhau, thiab koj nkim lub sijhawm thiab lub zog ntawm lub cub tawg. Qhov no yog cov txheej txheem ntshiab cov khoom siv tes ua, feem ntau tshwj xeeb rau lub plhaub system thiab qhov loj me.
Metallurgy thiab Pouring: Qhov twg Qhov Kev Txiav Txim Siab tshwm sim
Lub sijhawm no yog qhov tseeb. Koj muaj cov pwm kub thiab lub cub tawg ntawm cov hlau molten. Kev xaiv ntawm cov khoom zoo li ncaj nraim los ntawm daim ntawv spec, tab sis kev xyaum ua yaj yog txhua yam. Piv txwv li, nrog stainless hlau, tswj cov ntsiab lus nitrogen yog qhov tseem ceeb rau kev ua haujlwm corrosion. Koj tsis tuaj yeem pov cov seem rau hauv qhov cub induction. Tus nqi pleev yuav tsum tau tswj.
Degassing yog lwm kauj ruam tseem ceeb, tshwj xeeb tshaj yog rau aluminium alloys lossis steels xav tau lub zog qaug zog. Hydrogen khaws los ntawm noo noo yog yeeb ncuab. Koj yuav pom nws tom qab li porosity hauv radiographs. Peb ua hauj lwm nrog ntau yam los ntawm cam khwb cia hlau mus rau tshwj xeeb alloys xws li cobalt-based Stellite, thiab txhua tus muaj nws tus kheej seev cev. Pouring cobalt alloy rau lub rooj hnav-tiv taus lub rooj zaum yog qhov sib txawv ntawm cov tsiaj nyaum los ntawm nchuav cov hlau rau lub iav vaj tse. Lub superheating kub, lub pouring ceev kom tsis txhob turbulence, kev siv cov chills nyob rau hauv lub pwm los ncaj qha solidification ... tag nrho cov kev xaiv no yog ua nyob rau hauv feeb raws li lub tshav kub kev tsom xam thiab ib feem ntawm geometry.
QSY qhov hais txog kev ua haujlwm nrog cov alloys tshwj xeeb xws li nickel-based thiab cobalt-based sawv daws yuav yog lub teeb liab ntawm lub peev xwm. Cov no tsis yog cov ntaub ntawv yooj yim. Lawv muaj cov ntsiab lus siab melting, feem ntau reactive, thiab xav tau kev tswj xyuas thermal kom ua tiav lawv cov khoom xav tau (xws li creep kuj nyob rau hauv ib feem ntawm turbine). Kev tuav cov ntaub ntawv no ntseeg siab txhais tau hais tias lawv tau nqis peev hauv cov cuab yeej hluav taws xob zoo thiab muaj cov kws tshaj lij metallurgical los txhawb nws.
Tom qab: Ntxuav, Tiav, thiab CNC Handshake
Thaum lub casting tau txias thiab koj tau tawg tawm ntawm lub plhaub, koj nyob nraum sab laug nrog ib tug ntxhib ib feem txuas rau nws lub rooj vag system. Cov txheej txheem knockout xav tau kev saib xyuas - koj tsis xav ua kom puas cov yam ntxwv tsis yooj yim uas koj nyuam qhuav tsim. Tom qab ntawd los txiav tawm, feem ntau nrog lub log abrasive lossis band saw. Tom qab ntawd, sib tsoo kom tshem tawm lub rooj vag stubs. Qhov no yog phau ntawv, kev ua haujlwm txawj. Lub grinder uas paub txog qhov tuaj yeem txuag koj lub sijhawm ua haujlwm tom qab; ib tug uas tsis tuaj yeem zom tawm qhov tseem ceeb datum nto.
Qhov no yog qhov kev koom ua ke nrog CNC machining ua tsis yog-negotiable rau precision Cheebtsam. Tsawg heev peev castings yog tiag tiag net-puab rau kev ua haujlwm. Koj xav tau lub ntsej muag machined rau sealing, drilled thiab tapped qhov nrog cov lus qhia meej, los yog dhuav diameters nrog nruj tolerances. Qhov txiaj ntsig loj ntawm peev casting ntawm no yog tias nws muab rau koj nyob ze-net-zoo li preform, txo tus nqi ntawm cov khoom kim heev uas koj yuav tsum tau tshuab tam sim ntawd. Nws kuj tseem muab cov nyiaj pub dawb zoo ib yam thiab tsawg kawg nkaus, uas tso cai rau tus kws kho tshuab ua haujlwm ntau dua, cov cuab yeej siv tau zoo.
Muaj ob qho tib si casting thiab machining nyob rau hauv ib lub ru tsev, raws li QSY ua, tshem tawm qhov kev sib txhuam loj loj. Pab pawg casting paub tseeb tias cov khoom lag luam tawm mus rau cov tshuab. Cov machinists nkag siab txog qhov muaj peev xwm casting anomalies (xws li kev hloov pauv me ntsis lossis qhov porosity tsawg) thiab tuaj yeem ua haujlwm thawj zaug los ntxuav qhov chaw tseem ceeb tshaj plaws ua ntej. Qhov kev sib koom ua ke no yog qhov hloov pauv qhov zoo casting rau hauv kev txhim khu kev qha, kev ua haujlwm siab. Sim ua kom sib koom ua ke no hla ob tus neeg xa khoom sib cais yog mob taub hau ntawm kev thauj mus los, kev foob-ua haujlwm, thiab ntxiv sijhawm ua haujlwm.
Lus Nug: Qhov Kev Cai Tiag Tiag yog nyob rau hauv Kev Txiav Txim
Yog li, kev cai tiag tiag txhais li cas ntawm no? Nws tsis yog hais txog kev ua kom zoo nkauj xwb. Nws yog hais txog kev txiav txim siab uas tau siv rau ntawm txhua kauj ruam ntawm tus txheej txheem. Nws yog xaiv qhov zoo shrink factor rau no lobe ntawm lub impeller. Nws tau txiav txim siab ntxiv ib lub tsho tiv no ceramic ntxiv rau ntawm ib lub ntsej muag ntawm lub plhaub vim tias cov qauv thermal qhia tau tias qhov chaw kub. Nws yog tweaking lub rooj vag tsim los ntawm txoj haujlwm zoo sib xws los txhim kho cov txiaj ntsig los ntawm 5%.
Tus nqi ntawm kev ua haujlwm ntev tsis yog nyob rau hauv lawv cov npe khoom siv xwb; nws yog nyob rau hauv lawv lub hlwb database ntawm kev daws teeb meem. Thaum lawv saib daim duab tshiab, lawv tsis yog pom kab xwb; lawv nyob nraum visualizing tus qauv tuag, lub plhaub tsim, lub ncuav, lub solidification fronts, thiab qhov kawg machining teeb. Qhov ntawd yog kev cai hauv kev cai peev casting - cov txheej txheem kev tsim khoom tiav, tsis yog kev pabcuam molding nkaus xwb. Qhov chaw uas tuaj txog ntawm tus neeg siv khoom qhov chaw nres nkoj yog qhov tshwm sim ntawm ib puas me me, paub txog kev txiav txim siab, feem ntau tsis ua rau hauv daim ntawv tso cai.
