Thaum neeg tham txog casting precision, thawj yam uas feem ntau los rau hauv lub siab yog kev zam rau ntawm daim duab, tej zaum ib yam dab tsi zoo li ± 0.5mm. Qhov ntawd yog ib feem ntawm nws, paub meej, tab sis yog tias koj tau siv lub sijhawm tiag tiag rau hauv pem teb foundry, koj paub tias tsuas yog qhov chaw. Qhov tseeb precision hauv casting yog qhov ntxhov, holistic tshaj plaws - nws yog hais txog kev ruaj ntseg ntawm qhov chaw, paub meej, tab sis kuj hais txog kev ncaj ncees ntawm qhov chaw, sab hauv lub suab, thiab yuav ua li cas qhov kev coj cwj pwm tom qab nws tau shaken tawm thiab txias. Ntau tus neeg siv khoom, tshwj xeeb tshaj yog cov tshiab rau cov khoom siv castings, fixate ntawm tus lej ntawd. Lawv yuav thov kom tsis txhob nruj raws li-cam khwb cia kam rau ua yam tsis paub tias tus nqi tsav tsheb tsis yog cov pwm xwb, tab sis txhua yam los ntawm cov alloy lub shrinkage tus cwj pwm mus rau qhov koj npaj lub rooj vag system. Kuv twb pom tej yaam num mus rau sab vim hais tias ntawm disconnect. Qhov kev sib tham tiag tiag yuav tsum pib nrog kev ua haujlwm: qhov no ua li cas, qhov twg yog qhov tseeb tiag tiag, thiab qhov twg peb tuaj yeem tso cai rau qee qhov kev hloov pauv kom nws pheej yig? Qhov ntawd yog qhov kev paub dhau los.
Lub Plhaub Mould Balancing Act
Ntawm peb lub khw, plhaub pwm casting yog cov txheej txheem tseem ceeb, thiab nws yog qhov uas muaj ntau qhov kev sib ntaus sib tua. Qhov kev zoo nkauj ntawm nws yog qhov zoo tshaj plaws nto tiav thiab tsim nyog qhov tseeb qhov tseeb koj tuaj yeem tau ncaj qha tawm ntawm pwm. Tab sis kev tsim nyog tsis yog ib txwm txaus. Lub precision ntawm no yog ib qho kev ua haujlwm ncaj qha ntawm tus qauv. Yog tias koj tus qauv tus qauv tsis zoo tag nrho, suav nrog tus nqi qis qis mus rau feem ntawm ib feem pua, koj tsuas yog rov ua qhov yuam kev. Peb siv cov qib siab epoxy lossis hlau qauv, thiab lawv cov kev saib xyuas yog qhov tseem ceeb. Ib lub nti me me los yog ib qho kev tso tawm cov residue tau muab theej rau txhua lub plhaub koj ua.
Ces muaj lub plhaub nws tus kheej. Nws thickness thiab uniformity yog loj. Ib qho chaw nyias tuaj yeem ua rau kub hnyiab hauv lossis pob, tua koj qhov raug. Peb tswj qhov no los ntawm dipping thiab stuccoing tsis-lub slurry viscosity, xuab zeb grain loj, lub sij hawm ziab ntawm cov tsho loj. Nws suab zoo li txheej txheem, tab sis nyob rau hauv qhov chaw uas tsis yog huab cua-tswj (uas muaj ntau qhov chaw tsis muaj), ib hnub ntub dej tuaj yeem cuam tshuam koj lub voj voog kom qhuav, ua rau lub plhaub tsis muaj zog, tsis tshua muaj qhov ruaj khov. Koj kawm nyeem huab cua, tsis yog phau ntawv xwb. Lub hom phiaj yog lub plhaub uas muaj zog txaus los tswj cov hlau molten lub siab zoo li qub yam tsis muaj kev cuam tshuam, tab sis tsis yog tuab heev uas nws ua rau txias txias lossis tsim nws tus kheej cov ntsiab lus kev ntxhov siab. Nws yog calibration tas li.
Kuv nco qab ib pawg ntawm lub cev valve hauv duplex stainless hlau ob peb xyoos dhau los. Cov ntawv luam tawm tau hu rau kev ua siab ntev ntev. Lub plhaub tau zoo tag nrho, cov alloy yog rau spec, tab sis cov bores as-cam khwb cia tau tsis tu ncua ntawm qhov txwv qis. Qhov teeb meem? Tsis ntev los no peb tau hloov mus rau zircon xuab zeb tshiab rau cov tsho loj. Nws muaj qhov sib txawv me ntsis thermal conductivity, uas hloov lub solidification pem hauv ntej txaus los cuam tshuam lub shrinkage nyob rau hauv qhov tseem ceeb seem. Qhov kho tsis yog siv tshuab ntau dua - nws yog los kho cov qauv ntawm cov ntawv luam tawm qhov ntev los ntawm ob peb feem kaum kom them nyiaj rau lub plhaub tshiab. Qhov ntawd yog casting precision: tswj cov saw hlau sib txawv, tsis yog ib qho.
Peev Casting: Chasing Myth of Net-Shape
Kev nqis peev casting tau txais daim ntawv lo pov tseg ib puag ncig ntau, feem ntau ua lag luam raws li cov txheej txheem net-puab. Thiab nws tuaj yeem ua tau, rau qee qhov geometry. Tab sis net-puab yog me ntsis ntawm siren nkauj. Cov txheej txheem txhaj tshuaj siv quav ciab qhia txog nws tus kheej qhov sib txawv - txhaj tshuaj, qhov kub thiab txias, thiab lub sijhawm txias tag nrho cuam tshuam rau cov qauv siv quav ciab loj. 0.1% variation nyob rau hauv wax shrinkage tau magnified los ntawm ceramic plhaub tsim thiab zaum kawg hlau ncuav. Rau feem ntau ntawm kev lag luam-qib peev casting, koj tseem tab tom saib cov nyiaj machining, tsuas yog ib qho me me.
Qhov twg nws tiag tiag ci rau precision yog nrog cov yam ntxwv sab hauv thiab txoj kev contours uas yog txwv tsis pub kim rau tshuab. Xav txog cov impellers lossis turbine hniav nrog cov cua txias sab hauv. Cov casting precision ntawm no yog hais txog kev ntes qhov geometry ncaj ncees. Qhov kev sib tw yog tiv thaiv ceramic core hloov lossis distortion thaum dewaxing thiab tua. Peb feem ntau yuav tsim cov ntoo sib dhos siv quav ciab thiab qhov rooj tshwj xeeb rau thauj tog rau nkoj thiab txhawb nqa cov cores me me. Nws yog ib tug puzzle. Ib tug ua tsis tau tejyam puzzle txhais tau hais tias ib tug casting qhov twg cov lus sab hauv yog off-center, rendering ib feem tsis muaj txiaj ntsim txawm tias ib tug zoo meej sab nrauv.
Peb tau ua haujlwm ntawm ib qhov project rau cov khoom siv kho mob, ib feem ntawm cobalt-chrome alloy nrog cov qauv lattice. Machining nws yog tawm ntawm lo lus nug. Qhov yuav tsum tau ua kom raug yog tsawg dua ntawm qhov tshwj xeeb linear dimension thiab ntau ntxiv txog qhov sib xws ntawm lub lattice strut diameters thiab nto porosity. Peb tau dhau los ntawm kaum ob ntawm wax thiab plhaub zaub mov txawv. Qhov kev tawg tuaj ntawm kev kho qhov kub thiab txias ntawm pwm ua ntej nchuav. Kub dhau, thiab cov hlau yuav ua rau cov ntsiab lus zoo ceramic; txias heev, thiab cov hlau yuav tsis sau cov ntu nyias kiag li. Lub precision tau txhais los ntawm repeatability hla ntau pua qhov chaw, tsis yog ntaus tus lej ntawm ib qho.
Cov khoom yog Cov Lus
Koj tsis tuaj yeem tham txog precision yam tsis tau tham txog cov hlau nws tus kheej. Qhov no yog qhov chaw uas muaj ntau qhov chaw tsim khoom lag luam tsoo phab ntsa. Ntawm QSY, ua hauj lwm nrog txhua yam los ntawm cov hlau cam khwb cia rau nickel-raws li alloys txhais tau tias koj yuav tsum rov pib dua koj qhov kev cia siab rau txhua txoj haujlwm. Grey hlau muaj fluidity zoo thiab qhov kev poob qis, nyob ib ncig ntawm 1%. Nws kuj zam txim rau. Tab sis hloov mus rau nag lossis daus-hardening stainless hlau los yog high-nickel alloy, thiab tag nrho cov kev ua si hloov.
Cov alloys tshwj xeeb no muaj cov yam ntxwv sib txawv thermal contraction. Qee qhov ua rau kub kub tearing yog tias cov pwm nruj dhau lawm, uas ua rau koj siv cov khoom pwm tsis tshua muaj qhov ruaj khov-kev lag luam tawm tam sim. Lwm tus, zoo li qee cov txhuas bronzes, muaj qhov sib txawv ntev, ua rau lawv muaj kev cuam tshuam rau micro-porosity, uas tsuas yog tuaj yeem tshwm sim hauv X-ray tab sis tuaj yeem cuam tshuam rau qhov kev ua tau zoo nyob rau hauv siab. Koj lub rooj vag thiab kev tsim qauv nce siab dhau los ua qhov tseem ceeb rau qhov tseeb, tsis yog kom tsis txhob shrinkage kab noj hniav, tab sis kom ntseeg tau cov kev taw qhia ua kom muaj zog uas txo qis hauv kev ntxhov siab thiab cuam tshuam. Ib feem uas warps tom qab kev kho cua sov tsis yog ib feem, txawm tias nws ntsuas zoo kawg nkaus hauv lub xeev ntsuab.
Peb kawm qhov no txoj kev nyuaj nrog ib tug series ntawm cov twj tso kua mis loj nyob rau hauv ib tug nickel-chromium alloy. Thawj cov ntawv dhau qhov ntsuas qhov ntsuas. Tab sis tom qab cov tshuaj kho cua sov, lawv warped zoo li txiv tsawb. Qhov teeb meem yog residual stress xauv rau hauv lub casting los ntawm uneven txias txias. Peb yuav tsum rov qab los tsim kho cov risers thiab ntxiv cov tswv yim txias fins rau pwm los txhawb kev sib koom ua ke ntau dua. Lub precision yuav tsum tau engineered rau hauv thermal tswj ntawm cov txheej txheem, tsis yog cov pwm kab noj hniav.
Qhov twg CNC Machining Fits Hauv (Nws tsis yog Crutch)
Ntau tus neeg xav txog CNC machining raws li cov kauj ruam tu kom ua tiav qhov tseeb kawg, thiab rau qhov twg, qhov tseeb. Tab sis yog tias koj siv nws los ua ib lub cuab yeej rau kev xyaum ua haujlwm tsis zoo, koj cov npoo npoo evaporate. Lub hom phiaj yog los muab ib qho casting uas yog qhov txaus txaus rau kev ua haujlwm zoo. Qhov ntawd txhais tau hais tias cov phab ntsa tuab zoo ib yam, cov khoom lag luam tuaj yeem kwv yees tau, thiab tsawg kawg qhov tsis xws luag uas tuaj yeem rhuav tshem lub cuab yeej.
Peb lub tshuab machining hauv tsev ntawm QSY tsim cov lus qhia nruj. Cov machinists qhia peb raws nraim qhov twg cov Tshuag sib txawv, qhov twg nyuaj me ntsis, los yog ib tug casting yog springing thaum lub sij hawm clamping. Qhov intel ntawd ncaj nraim rov qab mus rau qhov chaw tsim khoom. Piv txwv li, yog tias peb tsis tu ncua pom ib qho ntxiv 0.3mm ntawm Tshuag ntawm ib lub ntsej muag flange, peb tuaj yeem kho tus qauv lossis cov txheej txheem molding kom rov qab tau. Qhov kev sib koom ua ke no yog qhov tso cai rau peb cog lus ntseeg tau casting precision. Nws tsis yog khawv koob; nws yog kev sib txuas lus.
Kuv nco qab txog ib txoj hauj lwm loj heev rau lub tsheb kauj vab. Raws li-cam khwb cia siab rau ntawm qee qhov ntsia hlau tus thawj qhov siab yog ciam teb rau tus neeg siv khoom siv tshuab machining kab. Lawv xav tau kev sib raug zoo heev. Los ntawm kev tshuaj xyuas thawj ob peb puas machined qhov chaw, peb tau txheeb xyuas qhov sib txheeb ntawm qhov kub thiab txias ntawm qhov kawg tus thawj coj qhov siab tom qab machining. Ib me ntsis siab dua temp ua rau tsawg shrinkage nyob rau hauv uas cais, hnyav seem. Peb nruj peb lub qhov rais qhov rais temp tswj, thiab qhov teeb meem ploj mus. Qhov tseeb tau ua tiav los ntawm kev tswj cov txheej txheem sib txawv peb tsis tau pib xav tias tseem ceeb rau qhov loj me.
Lub Ntiaj Teb tiag tiag kev sib haum xeeb thiab xa tus nqi
Yog li, tom qab tag nrho cov no, yog dab tsi casting precision? Hauv kev xyaum, nws feem ntau yog kos duab ntawm qhov ua tau nyob rau hauv kev lag luam kev muaj tiag. Nws paub tias thaum twg los qhia CT scan rau qhov tseem ceeb ntawm aerospace piv rau thaum tus qauv UT thiab qhov ntsuas qhov ntev txaus rau hydraulic manifold. Nws yog kev nkag siab tias 0.25mm nto roughness (Ra) yuav ua tau raws li-cam khwb cia nrog peev casting, tab sis rau ib tug loj plhaub pwm ib feem, qhia 1.6 hli Ra thiab npaj rau ib tug ceev machining pass yog smarter thiab pheej yig dua.
Tus nqi peb muab ntawm ib lub tuam txhab xws li Qingdao Qiangsenyuan Technology tsis yog nyob rau hauv kev tsim cov duab xwb. Nws yog nyob rau hauv kev coj tus neeg siv khoom los ntawm cov kev lag luam tawm no. Koj tuaj yeem nrhiav peb txoj hauv kev thiab kev muaj peev xwm piav qhia ntawm https://www.tsingtaocnc.com. Nrog ntau tshaj peb xyoo caum nyob rau hauv casting thiab machining, qhov kev txawj ntse tiag tiag yog nyob rau hauv pre-empting teeb meem. Nws yog nyob rau hauv saib ntawm daim duab thiab hais tias, Lub vojvoog ntawd yog qhov ntse heev rau cov hlau uas koj tau xaiv - nws yuav tsim kom muaj kev ntxhov siab thiab tsis tuaj yeem sau. Cia peb so nws los ntawm 1 hli, thiab koj yuav tau txais ib feem ntau txhim khu kev qha. Qhov ntawd yog kev xav txog qhov tseeb-nws tshwm sim ntev ua ntej cov hlau tsis tau yaj.
Thaum kawg, chasing kiag li, zoo meej, raws li-cam khwb cia precision ntawm txhua qhov chaw yog ib tug neeg ruam txoj hauj lwm. Tus nqi nkhaus mus ntsug. Qhov kev txawj ntse tiag tiag yog txhawm rau txheeb xyuas cov yam ntxwv tseem ceeb ntawm kev sib khi - qhov chaw sib khi, cov ntawv sau cia, cov mating interfaces - thiab nchuav tag nrho koj cov txheej txheem tswj kom ua rau cov cheeb tsam zoo meej. Tus so tuaj yeem tswj tau. Qhov ntawd yog li cas koj xa cov khoom meej meej, tsis yog qhov tseeb casting. Nws yeej tsis yog hais txog tus lej ntawm nplooj ntawv xwb. Nws yog hais txog qhov uas ua haujlwm, kav ntev, thiab ua rau kev lag luam. Qhov ntawd yog qhov kawg.
