Thaum cov neeg feem coob hnov 'xuab zeb casting txhuas', lawv pom ib qho yooj yim, yuav luag cov txheej txheem tseem ceeb - pov tseg cov hlau molten rau hauv cov xuab zeb pwm, txias nws, thiab koj ua tiav. Qhov ntawd yog qhov kev tsis ncaj ncees loj tshaj plaws. Qhov kev muaj tiag yog kev sib tham tas li ntawm qhov fluidity ntawm txhuas thiab cov tawv tawv ntawm cov xuab zeb, qhov twg kev vam meej hinges ntawm cov ntsiab lus feem ntau specs tsis tau hais txog. Nws tsis yog ib txoj kev casting xwb; nws yog ib tug series ntawm xam compromises.
Cov xuab zeb tsis yog av xwb, thiab Aluminium tsis yog hlau xwb
Wb tham txog cov xuab zeb ua ntej. Ntsuab xuab zeb, resin-bonded, sodium silicate - txhua tus muaj nws tus kheej. Rau kev ua haujlwm ntawm txhuas, ib qho zoo ol' ntsuab xuab zeb sib xyaw nrog cov av nplaum kom zoo thiab tswj cov dej noo yog qhov ua haujlwm. Tab sis kuv tau pom tej yaam num ua tsis tiav vim ib tug neeg kho cov xuab zeb zoo li cov khoom zoo li qub. Nws yog ib qho kev ua neej nyob. Cov xuab zeb rov siv dua, tab sis nws degrades, khaws cov kab mob los ntawm cov khoom siv hluav taws xob, thiab nws cov permeability hloov. Yog tias koj tsis saib xyuas nws cov khoom batch rau batch, koj yuav pib tau txais qhov tsis xws luag, xws li scabbing lossis nas tails, uas zoo li cov teeb meem hlau tab sis yog cov teeb meem xuab zeb.
Tom qab ntawd muaj aluminium. 'Aluminium' yog dav heev. Puas yog peb tham A356 rau nws cov castability zoo heev thiab kev kho cua sov? Los yog tej zaum 6061 rau ib qho tshwj xeeb machinability yuav tsum tau, txawm tias nws yog trickier los nrum? Qhov kev xaiv dictates txhua yam - qhov kub thiab txias, lub rooj vag system tsim, lub solidification shrinkage. Pouring A380 ntawm tib qhov kub li A356 yog ib daim ntawv qhia rau porosity. Lub alloy dictates tus seev cev.
Qhov no yog qhov kev paub dhau los ntawm lub khw muag khoom tag nrho tseem ceeb. Ib qhov chaw zoo li Qingdao Qiangsenyuan Technology Co., Ltd. (QSY), nrog rau lawv kaum xyoo hauv casting thiab machining, tau txais qhov kev sib tshuam. Lawv yuav tsis cia li saib ib daim duab rau ib lub tsev nyob aluminium; lawv xav txog tag nrho cov lus los ntawm molten hlau mus rau tiav, machined ib feem. Cov txheej txheem xuab zeb casting teeb tsa theem rau tag nrho cov dej ntws hauv CNC. Ib qho tsis zoo cam khwb cia nrog cov shrinkage sab hauv lossis cov pob tawv tawv yuav tua cov cuab yeej thaum lub sij hawm machining, tus nqi feem ntau saib tsis zoo hauv cov nqe lus pheej yig casting.
Gating, Pub, thiab Art of Directional Solidification
Qhov no yog lub plawv ntawm nws. Koj tuaj yeem muaj cov xuab zeb zoo meej thiab zoo meej alloy, tab sis yog tias koj lub rooj vag thiab nce siab (feem ntau) yog qhov kev xav tom qab, koj yuav khawb qhov. Lub hom phiaj yog kev taw qhia kev ua kom muaj zog: ua rau cov hlau khov kho los ntawm qhov deb tshaj plaws ntawm qhov casting rov qab mus rau lub riser, uas yog lub pas dej ntawm cov hlau kub uas pub shrinkage. Rau aluminium, qhov no yog qhov tseem ceeb vim nws qhov shrinkage tus nqi tseem ceeb.
Kuv kawm qhov no nyuaj heev thaum ntxov nrog ib tug tuab-walled twj bracket. Lub casting ntsia lub suab, tab sis thaum lub sij hawm ntsuas siab, nws leaked. Sectioning nws qhia ib tug spongy center ntawm micro-shrinkage porosity. Qhov teeb meem? Lub riser me me dhau lawm thiab muab tso tsis raug; nws solidified ua ntej qhov tuab ntawm lub bracket tau ua, yog li tsis muaj kua hlau sab laug los pub qhov shrinkage. Qhov kho tsis yog tsuas yog ntxiv hlau ntxiv; nws tau redesigning lub rooj vag los tswj cov thermal gradient. Peb siv cov chills-hlau ntxig rau hauv cov xuab zeb-ua kom txias txias hauv cov cheeb tsam tshwj xeeb thiab quab yuam kom khov rau hauv txoj cai.
Software simulation pab tam sim no, tab sis nws tsis yog txoj moo zoo. Nws muab rau koj ib tug qauv, kev twv ua ntej. Koj tseem yuav tsum tau txhais nws nrog kev paub txog tswv yim. Qee lub sij hawm, qhov kev simulation qhia qhov chaw kub, thiab phau ntawv qhia hais tias ntxiv ib qho riser rau ntawd. Tab sis yog tias qhov chaw ntawd nyob hauv lub vev xaib nyias, ntxiv cov riser loj heev yog overkill thiab tsim lub nra loj loj. Tej zaum qhov kev daws teeb meem zoo dua yog hloov me ntsis ntawm qhov tsim nrog tus neeg siv khoom, ntxiv ib qho me me rau rov faib cov pawg. Qhov ntawd yog hom kev tsim khoom muaj nqis uas tus khub caij nyoog coj.
Qhov twg Sand Casting hits nws txwv (Thiab qhov twg nws ci)
Sand casting aluminium yog qhov zoo heev rau cov ntim qis rau nruab nrab, rau qhov loj, thiab rau cov qauv tsim uas yuav txwv tsis pub kim rau tshuab los ntawm cov khoom billet. Xav tias cav thaiv, kis tau tus mob, cov qauv loj loj. Qhov saum npoo tiav yuav tsis zoo li kev nqis peev casting lossis tuag casting, thiab qhov ntev ntev yog dav dua. Koj tab tom ua lag luam tawm qee qhov kev ua kom yooj yim thiab txo cov cuab yeej siv.
Tab sis qhov txwv tsis yog qhov loj me los yog kam rau ua. Nws yog geometric complexity. Qhov tob, nqaim hnab ris? Undercuts? Cov no yog npau suav phem rau ib qho yooj yim ob feem xuab zeb pwm. Koj pib ntxiv cov cores - cais cov xuab zeb duab ntxig rau hauv pwm. Txhua tus tub ntxhais ntxiv cov nqi, qhov nyuaj, thiab qhov chaw tshiab ntawm qhov tsis xws luag (xws li cov tub ntxhais hloov lossis roj los ntawm cov tub ntxhais khi). Kuv nco qab txog qhov project rau lub cev valve complex qhov twg cov tub ntxhais sib dhos muaj rau qhov sib cais. Tus nqi tawm los yog txaus ntshai kom txog thaum peb hloov cov ntaub ntawv tseem ceeb rau ib qho uas tsim cov roj tsawg thiab nce cov tub ntxhais luam qhov ntev (cov ntsiab lus sau npe) kom ruaj ntseg zoo dua.
Qhov no yog vim li cas cov tuam txhab uas muaj ntau yam txheej txheem, xws li QSY nrog lawv lub plhaub pwm thiab peev casting peev, muaj qhov zoo dua. Lawv tuaj yeem saib ntawm ib feem thiab hais ncaj ncees, Rau qhov geometry no thiab yuav tsum tau ua kom tiav, xuab zeb casting tsis zoo. Kev nqis peev casting tuaj yeem txuag koj tus nqi tag nrho los ntawm kev txo cov machining. Lub hom phiaj ntawd yog qhov tseem ceeb.
Qhov tseem ceeb Handoff: As-Cast to Machined
Lub casting tsis yog ib feem tiav. Yuav luag ib txwm, nws xav tau machining. Kev sib raug zoo ntawm lub tsev tsim khoom thiab lub khw muag khoom tsis tuaj yeem yog tus yeeb ncuab. Tus kws kho tshuab yuav tsum nkag siab txog qhov xav tau ntawm kev ua haujlwm-xws li cov duab me me ntawm lub ntsej muag ntsug, lub peev xwm rau qhov chaw nyuaj nyob ze, lossis cov nyiaj tsis sib xws. Lub foundry yuav tsum nkag siab tias tus kws kho tshuab xav tau dab tsi: cov ntaub ntawv zoo ib yam, cov khoom lag luam txaus rau kev ntxuav, thiab tsis txhob muaj qhov tsis xws luag hauv qhov chaw tseem ceeb.
Kev ua haujlwm sib xyaw ua ke daws qhov no. Yog hais tias tib lub tuam txhab uas pours lub casting kuj tshuab nws, xws li cov CNC machining kev pabcuam ntawm QSY, lub tswv yim voj yog nruj. Pab neeg machining qhia rau qhov chaw tsim khoom, Peb pom cov cuab yeej hnav txhua zaus peb tsoo qhov kev sib tshuam no. Lub foundry tuaj yeem tshawb xyuas-tej zaum nws yog alumina suav nrog, tej zaum nws yog qhov chaw txias txias-thiab kho cov txheej txheem. Qhov kev sib koom ua ke no yog qhov koj ua tiav kev ntseeg tau. Nws hloov cov khoom siv los ua ib qho kev daws teeb meem.
Kuv tau nyob rau hauv tej yaam num uas lub casting yog los ntawm ib tug neeg muag khoom thiab machining los ntawm lwm tus. Tus ntiv tes taw thaum ib pawg ua tsis tiav yog qhov kawg. Puas yog qhov tsis zoo ntawm casting lossis machining yuam kev? Ib tus neeg muab kev koom ua ke yog tus tswv ntawm tag nrho cov txheej txheem, thiab qhov kev lav phib xaub txhais tau zoo.
Khoom siv tsis yog Island: Thaum Aluminium tsis txaus
Thaum kawg, xav txog cov ntaub ntawv. Thaum peb tsom ntsoov rau aluminium, ib qho chaw zoo tsis xav hauv silos. Qee lub sij hawm, dab tsi pib raws li aluminium xuab zeb casting specification hloov zuj zus. Tej zaum qhov yuav tsum tau tiv taus qhov kub thiab txias los yog ntau dua corrosion. Muaj kev txawj ntse hauv lwm cov ntaub ntawv, xws li cov hlau tsis muaj steel thiab cov alloys tshwj xeeb (nickel-based, cobalt-based) uas QSY teev, muab kev pom dav dua. Lawv tuaj yeem hais tias rau ib qho chaw hnav khaub ncaws ntawm ib qho txhuas, qhov sib txawv ntawm cov hlau ntxig tuaj yeem raug cam khwb cia hauv lossis machined tom qab. Nws yog hais txog kev muaj tag nrho cov cuab yeej los daws cov neeg siv khoom qhov teeb meem kev ua tau zoo, tsis yog lawv qhov kev thov txheej txheem.
Yog li, xuab zeb casting aluminium? Nws yog ib tug deceptively teb. Nws yog hais txog kev tswj tus cwj pwm ntawm cov xuab zeb, coj lub zog ntawm cov hlau shrinking, tsim rau manufacturability txij thaum pib, thiab xyuas kom meej qhov cam khwb cia yog ib qho zoo tshaj plaws precursor rau nws kawg machined daim ntawv. Nws yog qhov tsis xis nyob, ua haujlwm ntawm tes, thiab tag nrho ntawm kev hloov pauv. Tab sis thaum nws tag nrho cov clicks, thiab koj rub lub suab, huv si casting los ntawm cov xuab zeb, npaj rau precision machining, uas yog qhov tiag them nyiaj. Nws tsis yog primitive; nws yog foundational.
