Thaum tib neeg hnov 'kev nqis peev casting aerospace', lawv feem ntau pom qhov tsis zoo, gleaming turbine hniav tshiab tawm ntawm cov yeeb yaj kiab tshaj tawm. Qhov tseeb yog deb messier, ntau constrained, thiab frankly, nthuav ntau. Nws tsis yog hais txog kev ua tiav cov geometry nyuaj; Nws yog ib qho kev sib tham tas mus li ntawm kev tsim ambition, metallurgical kev muaj tiag, thiab kev lag luam siab phem ntawm ntim, seem nqi, thiab lub sij hawm txhuas. Ntau tus xav tias qhov kev ua siab ntev dua yog ib txwm zoo dua, tab sis kev qhia txog ± 0.05mm ntawm qhov tsis tseem ceeb sab hauv tuaj yeem ua rau peb tus nqi rau xoom cov txiaj ntsig. Qhov ntawd yog qhov chaw ua haujlwm tiag tiag.
Lub ntsiab lus tsis meej: Nws tsuas yog txheej txheem meej
Qhov loj tshaj oversimplification yog kho peev casting raws li tsuas yog ib tug precision lwm txoj rau forging los yog machining. Precision yog qhov tshwm sim, tsis yog muab. Nws tau khwv tau los ntawm kev tswj ntawm ib puas qhov sib txawv. Piv txwv li, cov qauv siv tshuaj pleev ib ce - qhov kub thiab txias, siab, lub sijhawm nyob hauv - ncaj qha cuam tshuam qhov kev ruaj ntseg ntawm qhov ntev thiab qhov chaw tiav ntev ua ntej cov hlau yog nchuav. Ib qho kev hloov pauv me me hauv chav ciab qhov kub thiab txias tuaj yeem qhia cov qauv kev ntxhov siab uas tsuas yog qhia lawv tus kheej li nyias-phab ntsa distortion tom qab lub plhaub tsev thiab dewaxing. Koj tsis yog casting hlau xwb; koj nyob nraum nrum tag nrho cov keeb kwm ntawm cov quav ciab thiab ceramic txheej txheem.
Kuv nco qab txog qhov project rau ib qho kev sib koom ua ke hauv cov nickel-based superalloy. Tus tsim tau thawb cov kev txwv ntawm cov phab ntsa nyias thiab ntse sab hauv cov ces kaum. Lub simulation saib huv si. Thawj cov ntawv, txawm li cas los xij, tau pom cov kua muag tsis tu ncua ntawm cov junctions. Cov tshuaj tiv thaiv tam sim los ntawm engineering yog tweak lub rooj vag. Tab sis cov hauv paus ntsiab lus yog qhov tseem ceeb tshaj: qhov tshwj xeeb alumina-silicate binder hauv cov txheej txheem slurry yog tsim kom muaj qhov tsis zoo thermal gradient tiv thaiv qhov tshwj xeeb alloy cov yam ntxwv solidification. Hloov mus rau zircon-raws li cov khoom siv, txawm tias nws tus nqi siab dua, daws nws. Zaj lus qhia? Lub plhaub hauv plhaub pwm casting tsis yog ib lub thawv passive; Nws yog ib qho active thermal system.
Qhov no yog vim li cas kev koom tes mus sij hawm ntev nrog cov foundries uas muaj kev sib sib zog nqus cov ntaub ntawv tshwj xeeb yog qhov tseem ceeb. Ib lub tuam txhab zoo li Qingdao Qiangsenyuan Technology Co., Ltd. (QSY), nrog lawv peb xyoo caum hauv peev casting thiab machining, yuav tau ntsib cov xwm txheej no suav tsis txheeb. Lawv cov kev paub dhau los ntawm cam khwb cia hlau, steel, thiab tseem ceeb heev cobalt-based alloys thiab Nickel-raws li alloys txhais tau hais tias lawv yuav tau tsim ib lub tsev qiv ntawv intuitive uas lub plhaub zaub mov ua haujlwm nrog cov tsev neeg ntawm cov hlau nyob rau hauv txawv geometric stresses. Qhov kev paub tacit tsis nyob hauv ib pob software.
Cov Khoom Dance: Alloys tsis hloov pauv
Hais txog alloys, lub aerospace hloov mus rau cov ntaub ntawv xws li Inconel 718, Mar-M247, los yog cobalt-based HS-188 tsis yog ib tug spec daim ntawv hloov. Txhua tus cwj pwm zoo li tus tsiaj sib txawv thaum lub sijhawm peev casting txheej txheem. 718 kuj yog kev zam txim tab sis muaj kev sib cais yog tias qhov ntsuas kub ntawm cov plaub hau tawm. Lub tshuab nqus tsev melting rau lub directionally solidified Mar-M ib feem yog ib tug ballet ntawm kub tswj thiab tshem tawm ceev. Tau txais nws yuam kev, thiab koj tsis tsuas yog tau txais kev lees paub; koj tau txais lub cub tawg uas kim heev.
Peb kawm qhov no mob siab rau ntawm qhov project thaum ntxov rau lub khob combustor swirl. Cov ntawv luam tau hu ua tus tswv cobalt alloy. Peb tau txais qhov peb xav tias yog qib sib npaug. Cov chemistry yog nyob rau hauv spec, tab sis cov kab sib txawv - tej yam xws li lanthanum los yog yttrium cov ntsiab lus - hloov pauv qhov fluidity thiab kub kua muag tsis kam. Qhov tshwm sim yog 40% seem tus nqi ntawm thawj cov khoom lag luam vim tawg. Txoj kev kho tsis yog tus txheej txheem tweak; nws tau rov qab mus rau lub zeb rau lub yaj nrog ib tug nruj, ntau tailored kab keeb profile. Tam sim no, kuv yog hyper-paub tias qhov alloy spec yog qhov pib, tsis yog qhov lav.
Qhov no yog qhov chaw sib xyaw ua ke qhia lawv lub zog. Thaum tib lub koom haum tuav cov peev casting thiab tom qab ntawd CNC machining, lawv tuaj yeem ua kom paub kev lag luam tawm. Tej zaum lawv tawm ib qho ntxiv 0.5 hli ntawm cov khoom lag luam ntawm cov flange tsis yooj yim paub txog lawv cov machining pab pawg muaj lub tswv yim tshwj xeeb, txhim kho cov txheej txheem casting rau kev ncaj ncees es tsis yog ze-net-zoo li zoo meej. Saib ntawm QSYlub peev xwm (https://www.tsingtaocnc.com) qhia txog qhov kev sib koom ua ke no-casting thiab machining nyob rau hauv ib lub ru tsev-uas yog ib qho tseem ceeb rau aerospace qhov chaw uas tom qab cam khwb cia machining yog yuav luag ib txwm yuav tsum tau ntaus cov kawg datum nta.
Lub rooj vag thiab pub mis Puzzle: Ntau Daim Duab Tshaj Lij Tshawb Fawb
Simulation software tau los ntev, tab sis gating tsim tseem yog ib feem kev tshawb fawb, ib feem dub kos duab. Lub software tuaj yeem kwv yees qhov porosity shrinkage, tab sis nws tsis tuaj yeem suav tag nrho rau kev sib cuam tshuam ntawm lub plhaub ceramic lub thermal huab hwm coj thiab cov alloy lub freezing ntau yam nyob rau hauv lub ntiaj teb lub cub tawg. Kuv tau pom zoo nkauj simulated pub txoj kev tsis zoo vim lawv tsim qhov chaw kub hauv lub plhaub, ncua kev ua kom muaj zog hauv qhov tsis ncaj ncees lawm.
Ib qho piv txwv: lub tsev loj, nyias-walled titanium. Qhov kev simulation tau pom zoo ib qho yooj yim sab saum toj-qhov rooj nrog ntau lub feeders. Thawj lub ncuav ua rau txias kaw thiab laminations. Qhov teeb meem? Titanium ceev ceev txias thiab viscosity. Lub rooj vag tau tsim turbulent, txias hlau ua ntej nws puv lub kab noj hniav. Txoj kev daws teeb meem, tsim los ntawm kev sim thiab kev ua yuam kev, yog kev sib xyaw ntawm cov rooj vag me me, faib cov rooj vag thiab me ntsis siab dua superheat, ua ke nrog cov pwm ua ntej ua kom sov kom qeeb qhov pib txias. Nws yog counter-intuitive rau tus qauv xyaum rau txhuas los yog hlau.
Qhov kev daws teeb meem empirical no yog lub hauv paus ntawm txoj kev nyuaj peev casting. Koj pib nrog simulation, tab sis koj yuav tsum tau npaj kom lub cev rov ua dua. Tus neeg muag khoom txaus siab thiab muaj peev xwm los khiav cov kev sim me me no - feem ntau ntawm lawv tus kheej tus nqi los tsim kev sib raug zoo - yog qhov sib txawv tseem ceeb. Nws tsis yog hais txog kev muaj plhaub molding khoom siv; nws yog hais txog kev ua siab ntev thiab kev txawj ntse los debug cov txheej txheem rau koj qhov tshwj xeeb.
Lub Inevitable Handoff: Casting rau Machining
Tsis muaj aerospace casting yog tiag tiag li-cam khwb cia. Muaj ib txwm machining, feem ntau EDM, qee zaum vuam lossis brazing. Qhov kev tuav tes ntawm no yog qhov tseem ceeb ntawm tus ntiv tes taw. Tus kws kho tshuab ua rau lub qhov rooj rau qhov chaw nyuaj, qhov seem seem, lossis qhov porosity zais. Lub caster liam tus kws kho tshuab rau qhov tsis tsim nyog clamping los yog txhoj puab heev txiav.
Cov haujlwm ua tau zoo tshaj plaws uas kuv tau tswj hwm tau kho qhov cam khwb cia raws li daim ntawv ua ntej. Peb tuav kev tshuaj xyuas kev sib koom ua ke ntawm qhov chaw tsim khoom thiab lub khw muag khoom ua ntej thawj tus qauv txawm txiav. Cov lus nug xws li: Peb puas tuaj yeem ntxiv lub ncoo me me ntawm no rau lub tshuab machining datum? Puas yog phab ntsa tuab txaus rau koj lub siab chucking? Peb puas yuav tsum muaj kev ntxhov siab ua ntej lossis tom qab kev ua haujlwm nyuaj rau cov hlau no? Cov kev sib tham no yog kub. Lawv ua raws cov kev cia siab thiab tig cov txheej txheem serial mus rau qhov sib npaug.
Qhov no yog tus nqi implicit proposition ntawm tus muab kev pab tag nrho. Thaum twg QSY hais txog lawv cov kev txawj ntse ua ke hauv peev casting thiab CNC machining, nws qhia tau tias lawv tau suav tias yog kev sib tham hauv cov kev sib tham no. Lawv tuaj yeem ua kom zoo dua qhov casting kom ua tau zoo, paub meej tias lawv tus kheej machining department xav tau dab tsi. Nws tshem tawm cov txheej txheem loj heev ntawm kev pheej hmoo thiab kev sib txuas lus nyiaj siv ua haujlwm, uas rau qhov kev pab cuam aerospace, feem ntau muaj txiaj ntsig ntau dua li tus nqi me ntsis ntawm ib qho kev txuag nyiaj los ntawm cov khoom siv sib txuas.
Saib tom ntej: Tsis yog Complexity, tab sis Consistency
Lub neej yav tom ntej ntawm peev casting aerospace tsis tas yuav muaj ntau dua baffling geometry; additive manufacturing yog noj qhov nyuaj nyuaj crown. Tus nqi ntawm peev casting yuav solidify (pun npaj) nyob rau hauv high-volume, high-reliability Cheebtsam uas sib xws nyob rau hauv ntau txhiab qhov chaw yog qhov tseem ceeb. Xav txog cov khoom siv roj hluav taws xob, cov khoom siv hluav taws xob, cov khoom siv hluav taws xob - cov khoom uas yuav zoo li yooj yim tab sis tsis muaj kev zam rau qhov tsis xws luag.
Qhov kev sib tw hloov ntawm peb tuaj yeem ua tau? peb puas tuaj yeem ua tau kaum txhiab ntawm lawv tus kheej, nrog tus nqi seem qis dua 0.1%? Qhov no xav tau ntau hom kev sib txawv: cov txheej txheem kev txheeb cais ntawm qhov ntev ntawm cov quav ciab, lub plhaub dipping neeg hlau rau cov txheej txheem sib xws, thiab tshawb xyuas cov khoom siv hluav taws xob hauv lub sijhawm. Nws tsis tshua muaj kev txawj ntse thiab ntau ntxiv txog kev lag luam, cov ntaub ntawv-tsav rov ua dua.
Cov neeg muag khoom uas muaj sia nyob qhov kev hloov pauv no yuav yog cov uas tau nqis peev tsis yog hauv cov tshuab hluav taws xob tshiab, tab sis hauv cov pob txha digital los taug qab thiab tswj txhua qhov ntsuas. Nws yog qhov tho txawv, tsis zoo nkauj ua haujlwm ntawm kev tswj xyuas zoo uas yuav txhais cov tiam tom ntej ntawm aerospace foundries. Cov neeg uas tau txais nws yuav hais tsis yog ntawm tus nqi thiab muaj peev xwm, tab sis ntawm qhov pov thawj ntawm cov txheej txheem muaj peev xwm (Cpk) rau qhov tshwj xeeb uas koj nyiam. Tam sim no yog lub frontier tiag tiag.
