Thaum koj hnov 'precision casting qhov chaw tsim khoom', feem ntau lub siab dhia ncaj nraim rau kev kam rau siab thiab cov ntaub ntawv pov thawj. Qhov ntawd yog lub hauv paus, daim pib mus rau qhov kev ua si. Zaj dab neeg tiag tiag, ib qho uas cais tus neeg muab khoom siv los ntawm tus khub tiag tiag, tshwm sim hauv thaj chaw grey ntawm cov lej no - hauv kev txhais cov ntawv sau, kev tuav ntawm tus qauv tsim tsis meej, lossis kev txiav txim siab hu rau tus neeg siv khoom thaum 2 AM vim tias lub tshuab hluav taws xob tau saib me ntsis tawm xim. Nws tsis yog hais txog kev ua ib feem; nws yog hais txog kev nkag siab qhov kev ntxhov siab tsis hais nws yuav dais.
Lub Plhaub Game: Ntau dua li Pwm
Plhaub pwm casting tau pitched raws li tus nqi nruab nrab hauv av, thiab nws yog, tab sis qhov ntawd undersells nws nuance. Cov silica xuab zeb thiab cob sib xyaw - 'plhaub' - nws qhov sib xws yog txhua yam. nkig dhau lawm, thiab koj tau txais inclusions los yog pwm tawg thaum lub sij hawm pouring. Yooj yim heev, thiab qhov ntev stability tawm ntawm lub qhov rais. Peb kawm qhov no thaum ntxov nrog ib pawg ntawm cov twj tso kua mis rau cov neeg siv khoom. Cov khoom tau dhau qhov kev kuaj pom thawj zaug tab sis ua tsis tiav kev ntsuas siab ntawm tus neeg siv khoom lub xaib. Tus neeg ua txhaum? Microscopic xuab zeb yaig nyob rau hauv lub runner system peb tsis tau suav rau, uas hloov cov dynamic ndlwg txaus txaus los tsim turbulence thiab porosity nyob rau hauv ib qho tseem ceeb seem. Daim ntawv qhia tshwj xeeb hais tias 'plhaub pwm casting,' tab sis qhov tsis ua haujlwm tau hais tias peb tsis nkag siab cov kua dej ntawm peb tus kheej cov txheej txheem rau qhov tshwj xeeb geometry.
Qhov ntawd yog qhov uas 30 xyoo tuaj, zoo li ntawm qhov chaw nyiam Qingdao Qiangsenyuan Technology Co., Ltd. (QSY). Txoj cai ntawd tsis yog tus lej xwb; nws yog ib lub tsev qiv ntawv ntawm cov micro-failures thiab kho. Nws txhais tau hais tias lawv tau pom tias muaj dab tsi tshwm sim rau lub plhaub ntawd sib xyaw hauv cov av noo siab piv rau huab cua qhuav, thiab tau hloov kho lub voj voog ua ntej cua sov kom haum. Nws yog pab pawg neeg paub uas tsis ua rau nws mus rau daim ntawv muag khoom.
Kev nqis peev casting, lossis poob-wax, yog lwm tus ncej. Lub allure yog ze-net-puab complexity, tab sis tus ntxiab yog xav tias tag nrho cov complexities sib npaug. Ib qho nyias, txuas ntxiv flange thiab tuab, chunky hub ntawm tib qhov yuav txias ntawm radically txawv tus nqi. Koj tuaj yeem muaj kev txhaj tshuaj zoo meej thiab lub plhaub zoo nkauj ceramic, tab sis yog tias qhov kev sib tw ua kom muaj zog yog tawm los yog tsis quav ntsej, koj tab tom twv txiaj. Peb ib zaug nchuav ib pawg zoo nkauj ntawm stainless hlau impellers, tsuas yog nrhiav cov kab nrib pleb hauv cov hniav tom qab kev kho cua sov. Cov kev ntxhov siab raug kaw thaum lub caij txias; qhov kev daws teeb meem tsis yog qhov zoo dua qub, tab sis ib qho kev tsim kho tshiab ntawm lub rooj vag system los tswj cov thermal gradients, ib yam dab tsi uas yuav tsum tau zaum nrog tus neeg siv khoom tus engineer thiab hashing tawm kev sib haum xeeb.
Cov khoom siv maze: Alloys tsis tsim sib npaug
Stainless hlau. Suab hais ncaj. Tab sis 304L piv rau 316L rau daim ntawv thov marine? Qhov no yog ib qho pom tseeb hu. Qhov kev lom zem tiag tiag pib nrog 'tshwj xeeb alloys' - cov nickel-based thiab cobalt-based sawv daws yuav. Cov no feem ntau teev rau qhov chaw huab cua: kub kub, corrosion, hnav. Kev ntes yog, lawv tus cwj pwm thaum lub sij hawm casting yog dab tsi tab sis tus qauv. Lawv muaj cov ntsiab lus siab melting, txawv shrinkage yam ntxwv, thiab tuaj yeem nkag siab rau cov kab lus.
Kuv nco qab txog ib qhov project uas muaj cobalt-raws li alloy rau hnav phaj. Cov chemistry yog rau spec, cov neeg kho tshuab kuaj zoo ntawm daim coupon. Tab sis nyob rau hauv lub teb, ib feem hnav unevenly. Tom qab ntau lub taub hau-scratching thiab metallurgical tsom, nws muab tawm qhov teeb meem yog carbide tis. Qhov ntsuas cua txias peb siv, uas yog tus qauv rau cov cuab yeej hlau, tsis zoo rau kev txhawb nqa ib qho kev sib txuam, zoo carbide network hauv cov cobalt alloy tshwj xeeb. Peb yuav tsum tsim cov txheej txheem ua kom txias txias, yuav luag ib qho kev kho cua sov tom qab kev kho cua sov, kom tau txais qhov microstructure txoj cai. Tus neeg siv khoom kos duab tsuas yog hais tias Co-Cr-W alloy, ASTM XXXX. Qhov tseeb ntawm kev tsim khoom yog ob lub lis piam kev txhim kho kev sim.
Qhov no yog qhov chaw tsim khoom cov khoom siv pedigree tseem ceeb. Ib lub khw uas casually hais tias yog, peb ua cov nickel alloys yog txawv ntawm ib qho uas muaj cov kab mob rau cov kab mob thiab cov thermocouple teeb rau lawv, los tiv thaiv kev sib kis. Nws yog nyob rau hauv cov ntsiab lus ntawm lawv CNC machining txheej txheem, ib yam. Machining lub hardened stainless hlau casting yog ib yam; noj ib qho kev txiav ntawm nag lossis daus-hardening npib tsib xee alloy yuav tsum muaj cov cuab yeej sib txawv geometry, txau, thiab nrawm kom tsis txhob ua hauj lwm-hardening nto rau hauv lub xeev unmachinable.
CNC: Qhov twg Casting ntsib lub ntiaj teb no
Qhov no yog lub sij hawm ua-los-tawm. Koj tuaj yeem ncuav lub zoo meej casting, tab sis yog tias lub machining tsis koom ua ke rau hauv kev npaj txij thaum pib, koj tau poob. Nws yog hais txog kev xaiv datum, Tshuag nyiaj pub dawb, thiab nkag siab txog qhov casting 'tus kheej'.
Ib qho pitfall feem ntau yog kho cov casting raws li ib qho kev thaiv ntawm cov Tshuag. Tsis yog. Tej zaum yuav muaj qhov porosity me ntsis hauv qab ntawm daim tawv nqaij hauv ib cheeb tsam, lossis ib qho kev ntxhov siab uas nyob ntawm qhov txias. Ib qho hnyav, txhoj puab heev thawj txiav nyob rau hauv qhov tsis ncaj ncees lawm yuav distort ib feem los yog kua muag tawm cov khoom. Peb machined lub cev loj valve ib zaug, ib tug ductile hlau casting. Thawj qhov kev ua haujlwm yog mus ntsib lub flange mounting. Sai li sai tau raws li peb tso tawm lub clamping siab, ib feem bowed. Qhov kev ntxhov siab los ntawm kev tshem tawm cov tawv nqaij saum npoo tau tso cai rau latent casting stresses rau redistribute. Peb yuav tsum rov ua kom tiav cov haujlwm, ua kom sib zog, ntsuas kev txiav kom maj mam coj mus rau hauv kev ruaj ntseg.
Rau kev pabcuam puv ntoob precision casting qhov chaw chaw tsim tshuaj paus, machining tsis yog ib qho teeb meem ntawm tus neeg tsim khoom; nws yog qhov txuas ntxiv ntawm cov txheej txheem casting. Ntawm QSY, piv txwv li, muaj ob qho tib si casting thiab CNC machining nyob rau hauv ib lub ru tsev tsis yog rau logistics xwb. Nws txhais tau hais tias pab pawg machining paub txog qhov shrinkage ntawm lawv tus kheej peev castings, los yog tej zaum yuav nyuaj me ntsis nyob rau hauv lawv lub plhaub pwm daim. Lawv tuaj yeem tso cov khoom lag luam ntxiv rau hauv thaj chaw muaj teeb meem paub yam tsis raug nug. Qhov kev tawm tswv yim ntawd lub voj voog ntawm lub hauv pem teb thiab lub khw CNC tsis pom rau tus neeg siv khoom tab sis tseem ceeb rau qhov tshwm sim.
Kev Sib Txuas Lus Chasm: Drawings vs. Lub Hom Phiaj
Qhov no yuav yog qhov mob taub hau loj tshaj plaws. Daim duab kos yog cov ntaub ntawv raug cai thiab kev ua haujlwm, tab sis nws yog kev txhais lus tsis zoo ntawm tus kws ua haujlwm lub hom phiaj. Ib daim ntawv teev tiav saum npoo, ib daim ntawv tsis meej txog lub vojvoog ntawm txhua qhov npoo, ib qho kev hloov pauv tsis tau hais tseg - cov no yog qhov chaw yug me nyuam rau kev poob siab.
Kuv twb pom drawings rau ib precision casting ib feem nrog tolerances nruj dua li cas lub hauv paus txheej txheem casting tuaj yeem tuav tau, ntawm cov yam ntxwv tsis tseem ceeb. Blindly quoting rau qhov ntawd yog ib tug ntxiab. Txoj kev txav mus los yog mus nqa lub xov tooj. Peb pom qhov no +/- 0.1mm kam rau ntawm tus thawj mounting no. Puas yog rau kev sib tw, lossis rau kev sib tw? Vim yog tias nws yog rau kev tshem tawm, peb tuaj yeem tuav kev lag luam ntau dua li-cam khwb cia siab ntev thiab lav nws haum rau koj qhov kev sib tw. Ib nrab sij hawm, tus engineer txaus siab rau cov lus nug; tej zaum lawv yuav tau luam ib qho kev nthuav dav los ntawm lwm daim duab. Lwm qhov ib nrab, nws nthuav tawm qhov kev xav tau tseem ceeb uas xav tau txoj hauv kev sib txawv, xws li txav mus rau qhov chaw ua haujlwm precision.
Nws yog hais txog proactive clarification, tsis yog tsuas yog ua. Ib lub chaw tsim khoom lub vev xaib, zoo li tsi.com, tuaj yeem pom muaj peev xwm, tab sis qhov kev sim tiag tiag yog nyob rau hauv cov kev sib tham ua ntej. Lawv puas nug cov lus nug ntse? Puas yog lawv hais kom tsim qauv rau kev tsim khoom (DFM) tweaks uas ua kom yooj yim cov txheej txheem yam tsis muaj kev cuam tshuam kev ua haujlwm? Qhov ntawd yog lub cim ntawm kev paub.
Ua tsis tiav raws li Cov Ntawv Qhia
Tsis muaj leej twg hauv kev lag luam no muaj cov ntaub ntawv zoo meej. Cov uas koj xav ua haujlwm nrog yog cov uas muaj kev txheeb xyuas qhov tsis ua haujlwm zoo. Cov chaw tsim khoom zoo tsis zais cov no; lawv institutionalize cov kev kawm.
Peb tau muaj kev puas tsuaj thaum ntxov nrog cov txheej txheem ntawm txhuas-bronze peev castings. Lawv khaws cia qhia cov micro-porosity tawg. Peb kuaj txhua yam: siv quav ciab, plhaub, nchuav temp, dewaxing. Thaum kawg, ib tug qub-tes foundryman nug txog cov av noo nyob rau hauv qhov chaw cia rau tus tswv siv quav ciab qauv. Nws siab. Cov qauv tau absorbed txaus noo noo uas thaum lub sij hawm dewaxing (steam autoclave), cov dej tig mus rau hauv chav nyob rau hauv lub ceramic plhaub heev hnyav, me ntsis ua rau nws permeability. Qhov kho yog huab cua-tswj qauv cia. Ib qho me me, tsis pom qhov txawv txav.
Qhov ntawd yog hom granular, nyuaj-yeej kev paub uas txhais tau tias kev ua haujlwm paub tab. Yog vim li cas thaum ntsuas a precision casting qhov chaw chaw tsim tshuaj paus, koj yuav tsum nug tsis yog koj tuaj yeem ua qhov no? tab sis dab tsi yog qhov peb qhov txaus ntshai tshaj plaws uas koj pom nrog rau qhov no, thiab koj yuav txo lawv li cas? Lawv cov lus teb yuav qhia koj ntau dua li daim ntawv pov thawj ntawm phab ntsa. Nws yog nyob rau hauv kev tsis txaus siab ua ntej lawv teb, txoj kev uas lawv taw tes rau ib qho tshwj xeeb ntawm koj daim duab - qhov ntawd yog lub suab ntawm kev paub tiag tiag xav nrov nrov.
