Thaum cov neeg feem coob hnov 'poob siv quav ciab casting system', lawv pom cov txheej txheem ncaj nraim, yuav luag romantic: ua tus qauv siv quav ciab, tsim lub plhaub ceramic, yaj tawm cov quav ciab, ncuav hlau. Qhov tseeb nyob rau hauv ib puag ncig ntau lawm, tshwj xeeb tshaj yog ib tug tuav complex alloys, yog ib qho kev sib tham tas li ntawm cov khoom siv science, thermal dynamics, thiab sheer practicality. Nws yog ib qho system, tsis yog ib kauj ruam, thiab qhov ntawd yog qhov uas ntau tus kws tshaj lij thiab txawm tias cov engineers tshiab tuaj txog. Lawv tsom mus rau qhov casting nws tus kheej tab sis underestimate lub ecosystem - lub wax formulation, slurry chav tsev huab cua tswj, dewaxing txoj kev, lub firing nkhaus - uas tiag txiav txim seb koj puas tau ib tug masterpiece los yog seem. Tau dhau los ntawm qhov no tau ntau xyoo lawm, lub gloss hnav sai sai; dab tsi tseem yog tsom rau cov saw ntawm kev vam meej.
Lub hauv paus ntawm qhov system: Nws yog txhua yam hais txog kev tswj hwm thiab rov ua dua
Thawj qhov kev xav tsis zoo rau ditch yog tias peev casting yog kev kos duab. Hauv cov khoom sib xyaw ua ke, cov khoom ua haujlwm qis, tej zaum. Tab sis rau ib tug ruaj zoo li Qingdao Qiangsenyuan Technology Co., Ltd. (QSY), uas tau ua haujlwm rau ntau tshaj 30 xyoo, nws yog cov txheej txheem tswj kev lag luam. Lub 'system' pib ntev ua ntej hlau yog nchuav. Peb tab tom tham txog cov kev txhaj tshuaj wax. Qhov kub, siab, thiab tuav lub sij hawm rau txhaj cov qauv siv quav ciab ncaj qha cuam tshuam qhov kev ruaj ntseg thiab qhov chaw tiav. Qhov sib txawv ntawm ob peb degrees tuaj yeem qhia cov kev hloov pauv hloov maj mam uas sib xyaw tom qab. Kuv tau pom cov haujlwm ua tsis tiav vim tias chav tsev kub tsis ruaj khov, ua rau cov qauv tsis sib xws uas ua rau lub plhaub-tsev ua rau npau suav phem.
Tom qab ntawd los ntawm slurry thiab stucco daim ntawv thov. Qhov no tsis yog tsuas yog dipping thiab dunking. Lub viscosity ntawm thawj slurry, lub zircon hmoov / silica binder piv, cov av noo nyob rau hauv lub dipping chav tsev - txhua qhov sib txawv yog lub pob qhov rooj uas koj yuav tsum qhib. Rau cov nickel-based lossis cobalt-based superalloys, uas QSY ua haujlwm tsis tu ncua, lub plhaub yuav tsum tiv taus qhov kub thiab txias yam tsis muaj buckling lossis ua rau cov hlau. Peb feem ntau siv fused silica-raws li slurry rau cov no, tab sis lub sij hawm ziab ntawm cov tsho tiv no tseem ceeb heev. Rush nws, thiab koj ntxiab ya raws; tos ntev heev, thiab cov khaubncaws sab nraud povtseg tsis zoo. Nws yog lub suab sib dhos uas koj kawm los ntawm kev saib lub plhaub, tsis yog lub moos xwb.
Cov kauj ruam dewaxing yog qhov chaw 'poob ciab' tshwm sim, thiab nws yog lub sijhawm tsausmuag rau lub plhaub. Ob txoj hauv kev tseem ceeb yog autoclave (steam) thiab hluav taws kub. Txhua tus muaj nws qhov chaw. Rau cov tuab tuab tuab, kev tua hluav taws tuaj yeem ua rau tawg los ntawm thermal shock. Peb feem ntau nyiam autoclave rau complex geometries uas muaj nyob rau hauv peb plhaub molding thiab peev casting ua hauj lwm, raws li nws yog softer. Tab sis txawm li ntawd los, tus nqi nce thiab siab yuav tsum sib phim rau hom siv quav ciab. Puas siv cov tshuaj nplaum uas tsis tshua muaj melting point? Ntau lub zog siab dhau nrawm dhau, thiab qhov nthuav dav tseem tuaj yeem tawg lub plhaub ntsuab. Nws yog ib qho kev ntsuas ntsuas uas xav tau ntau dua li cov qauv qee zaum.
Material Matters: Vim li cas Alloy Choice Dictates tus txheej txheem
Koj tsis tuaj yeem cais cov poob ciab casting system los ntawm cov khoom raug cam khwb cia. Cov txheej txheem rau cov hlau ductile yog qhov sib txawv ntawm qhov ntawd rau cov hlau nplaum nickel zoo li Inconel 718. Qhov no yog lub zog tseem ceeb ntawm lub chaw zoo li QSY. Nrog cov hlau tsis muaj steel, lub hom phiaj yog txhawm rau tiv thaiv qhov chaw carburization ntawm lub plhaub, yog li peb yuav siv qhov nruab nrab lossis me ntsis oxidizing hluav taws xob cua. Tab sis nrog reactive alloys zoo li titanium (txawm tias peb tsis nrum nws, lub hauv paus ntsiab lus siv rau peb high-nickel alloys), koj tab tom sib ntaus sib tua alpha-case. Lub plhaub muaj pes tsawg leeg ua qhov tseem ceeb - feem ntau tsiv mus rau yttria lossis lwm lub ntsej muag txawv txawv.
Rau cov khoom siv hlau thiab cov hlau tsis muaj steel, qhov kev sib tw feem ntau yog pub thiab shrinkage. Lub rooj vag system tsim, uas yog ib feem ntawm cov qauv siv quav ciab los ua ke, yog qhov kev paub txog metallurgical tiag tiag los hauv. Nws tsis yog hais txog kev txais hlau rau hauv kab noj hniav; nws yog hais txog kev tsim kev taw qhia solidification. Kuv nco qab lub twj tso kua mis vaj tse nyob rau hauv 17-4PH stainless uas khaws cia pom porosity nyob rau hauv ib tug tuab flange. Peb rov tsim kho cov ntoo siv quav ciab, ntxiv ib lub chiller hauv lub plhaub peev ze ntawm thaj chaw teeb meem los txhawb kom txias dua. Nws ua haujlwm, tab sis nws ntxiv tus nqi thiab lub plhaub-tsev complexity. Lub kaw lus yuav tsum hloov kho.
Ua hauj lwm nrog tshwj xeeb alloys xws li Stellite (cobalt-based) qhia lwm txheej: pouring kub tswj. Cov alloys no muaj qhov nqaim 'superheat' ntau yam - txias dhau, thiab lawv yuav tsis sau cov ntu nyias; kub dhau heev lawm, thiab lawv tuaj yeem ua rau lub plhaub sab hauv, tsim kom muaj qhov tsis xws luag. Peb qhov kev xyaum ua melting, txawm tias siv qhov cub induction, yog calibrated rau txhua pawg alloy. Cov logbooks los ntawm kaum xyoo ntawm kev khiav ntawm tsi.com yog arguably zoo li cov khoom siv, muab keeb kwm siv rau dab tsi ua hauj lwm thiab dab tsi tsis nrog cov ntaub ntawv tshwj xeeb qib.
Qhov Tseem Ceeb Txuas: Kev sib koom ua ke CNC Machining rau hauv Casting Workflow
Qhov no yog qhov uas ntau qhov chaw ua si dawb huv poob luv, thiab qhov chaw ua haujlwm sib koom ua ke qhia nws tus nqi. A ploj wax casting yuav luag tsis tau tiav ib feem. Nws muaj lub rooj vag seem, ua tau me fins, thiab xav tau qhov chaw tseem ceeb machined kom nruj tolerances. Ntawm QSY, muaj CNC machining hauv tsev tsis yog ib qho yooj yim; nws yog ib qho tsim nyog rau kev tswj kom zoo. Vim li cas? Vim hais tias tus machinist muab thawj cov tswv yim tiag tiag ntawm lub suab sab hauv ntawm lub casting.
Yog tias lub cuab yeej me ntsis dheev hnav sai dua ntawm thaj chaw tshwj xeeb ntawm ntau qhov castings, nws qhia tau hais tias muaj peev xwm nyuaj los yog suav nrog pawg los ntawm cov txheej txheem casting. Cov lus teb kaw-loop no yog irreplaceable. Peb tuaj yeem taug qab qhov teeb meem machining rov qab mus rau lub plhaub tshwj xeeb, cov xov tooj cua sov, qhov kub thiab txias tau nkag rau hnub ntawd. Yog tias tsis muaj kev sib koom ua ke ntsug no, lub voj kev tawm tswv yim tau tawg, thiab cov teeb meem nyuaj rau kev kuaj mob thiab daws mus tas li.
Tsis tas li ntawd, kev tsim cov qauv siv quav ciab nws tus kheej feem ntau cuam tshuam los ntawm kev xav tau ntawm machining. Tej zaum peb yuav ntxiv cov khoom lag luam ntxiv (ib qho 'cov nyiaj pub siv tshuab') hauv cov chaw tshwj xeeb paub txog peb lub tuam txhab CNC yuav ua tiav nws. Los yog, peb yuav muab qhov chaw rau ntawm tsob ntoo ciab kom txo qis machining teeb tsa lub sijhawm tom qab. Qhov kev sib koom ua ke ntawm cov hauv pem teb casting thiab lub khw muag khoom yog dab tsi hloov qhov zoo casting rau hauv ib qho kev txhim khu kev qha, kev ua haujlwm siab. Nws yog qhov sib txawv ntawm kev ua cov duab thiab ua ib feem ua haujlwm.
Kev Ua Tsis Taus Feem ntau thiab Cov Lus Qhia Lawv muab
Leej twg tsis tau ua ib yam dab tsi. Hauv peev casting system, tsis ua hauj lwm yog kim xib fwb. Plhaub tawg thaum dewaxing los yog firing yog ib qho classic. Feem ntau, nws tau taug qab mus rau qhov tsis txaus ziab ntawm slurry tsho loj, tshwj xeeb tshaj yog nyob rau hauv huab cua ntub. Peb tawm tsam qhov no nrog kev tswj dehumidification hauv thaj chaw dipping - ib qho kev daws teeb meem yooj yim, tab sis ib qho koj tsuas yog siv tom qab poob ob peb lub plhaub.
Hlau tsis xws luag xws li shrinkage porosity los yog kua muag kub yog lwm pawg. Cov no feem ntau taw qhia rov qab mus rau qhov rooj vag thiab nce kev tsim, lossis nchuav kub. Cov ntaub ntawv nco tau yog lub cev valve hauv duplex stainless hlau. Peb khaws cia tau txais micro-porosity hauv qhov chaw thermal. Cov qauv siv quav ciab thiab rooj vag zoo li suab. Qhov kev tawg tuaj thaum peb saib xyuas lub voj voog tua ntawm lub plhaub. Nws muab tawm qhov kub-kub tuav tsis ntev txaus los hlawv tag nrho cov khoom seem seem ntawm cov tub ntxhais sab hauv, tsim kom muaj cov pa roj me me uas cuam tshuam kev noj zaub mov. Extending lub firing so lub sij hawm daws nws. Zaj lus qhia? Qhov teeb meem tsis yog ib txwm nyob qhov twg koj saib thawj zaug - nws tuaj yeem ua rau hauv lub plhaub npaj.
Dimensional inaccuracy yog ib tug qeeb killer. Nws yuav tsis ua rau tsis lees paub, tab sis nws tua cov txiaj ntsig los ntawm kev siv ntau dhau. Qhov no feem ntau loops rov qab mus rau lub wax qauv stability. Kev siv cov khoom siv rov ua dua tshiab yam tsis tau sim nws qhov kev sib cog lus rau qhov tshiab geometry yog ib qho pitfall. Peb tam sim no nruj me ntsis kuaj cov wax tshiab los yog saib xyuas kev laus ntawm peb cov khoom tam sim no, ua kev hloov me me rau cov cuab yeej txhaj tshuaj kom them nyiaj. Nws yog ib tug nruam calibration ntawm thawj kauj ruam nyob rau hauv lub system.
Lub Ntiaj Teb Ecosystem tiag tiag: Los ntawm Kev Tshawb Fawb Txog Kev Ua tiav
Yog li, qhov system no zoo li cas hauv kev xyaum ntawm kev ua haujlwm ntev? Nws pib nrog kev tshuaj xyuas ntawm cov duab kos thiab cov khoom siv spec. Cov engineers ntawm QSY tsis tsuas yog pom cov duab xwb; lawv pom cov thermal loj faib, cov ntsiab lus kev ntxhov siab, thiab machining datums. Kev tsim cov cuab yeej siv quav ciab yog npaj siab, feem ntau nrog cov tswv yim los ntawm pab pawg CNC ntawm fixturing. Cov wax yog txhaj thiab sib sau ua ke rau hauv cov ntoo.
Lub plhaub-tsev pib - ib qho qeeb, txheej txheem ntawm dipping, stuccoing, thiab ziab uas tuaj yeem siv sijhawm ntev li ib lub lim tiam rau lub plhaub zoo rau cov hlau alloys. Txhua batch yog teev. Dewaxing thiab firing hloov lub plhaub ntsuab tsis yooj yim rau hauv cov pwm tsis zoo ceramic. Lub caij no, cov alloy tshwj xeeb-xws li carbon steel, 316 stainless, los yog npib tsib xee-raws li alloy-yog npaj thiab melted nyob rau hauv kev tswj tej yam kev mob. Lub ncuav yog ceev, tab sis lub teeb thiab ntsuas kub tsis yog.
Tom qab txias, lub plhaub tau muab tshem tawm, cov khoom raug txiav los ntawm tsob ntoo, thiab lawv tsiv mus rau qhov pib ua tiav (steev blasting, txiav tawm). Tom qab ntawd los ntawm qhov tseem ceeb tshaj tawm rau CNC machining. Ntawm no, ib feem yog validated tiv thaiv luam. Kev tshuaj xyuas zaum kawg, tejzaum nws suav nrog NDT zoo li dye penetrant, kaw lub voj. Tag nrho poob ciab casting system, yog li ntawd, yog qhov kev sib koom ua ke no: qauv tsim, plhaub tsev, melting / pouring, thiab tom qab cam khwb cia ua. Ib qho kev sib txuas tsis muaj zog hauv txhua ntu cuam tshuam qhov kawg ntawm cov khoom. Nws yog qhov kev pom zoo, ua rau peb caug xyoo ntawm kev daws teeb meem thoob plaws tag nrho cov theem no, uas txhais tau hais tias tus neeg muag khoom muaj peev xwm, tsis yog lub peev xwm los ncuav hlau rau hauv pwm.
