Thaum cov neeg feem coob hnov 'aluminium sand casting foundry', lawv pom ib qho yooj yim, yuav luag archaic txheej txheem los ua qhov yooj yim, ntxhib. Qhov ntawd yog thawj qhov kev xav tsis zoo. Qhov tseeb yog ntau nuanced; Nws yog ib txoj hauv kev uas, thaum ua tiav nrog qhov tseeb thiab kev nkag siab, sib tw hauv qhov chaw koj tsis xav tau. Nws tsis yog hais txog kev muab cov hlau pov tseg rau hauv lub qhov xuab zeb. Nws yog hais txog kev tswj hwm qhov sib txawv - xuab zeb muaj pes tsawg leeg, noo noo, binder systems, gating design, solidification control - uas cais cov khoom siv tau los ntawm cov khoom seem. Kuv tau pom ntau txoj haujlwm ua tsis tiav vim tias tus qauv tsim tau muab pov rau ntawm phab ntsa mus rau qhov chaw tsim khoom yam tsis xav txog cov ntsiab lus no. Qhov kev xaiv ntawm ib lub chaw tsim khoom feem ntau ua rau lawv nkag siab ntawm cov ntsiab lus no, tsis yog lawv cov npe khoom siv xwb.
Lub hauv paus ntawm txoj kev: Nws yog tag nrho hauv cov xuab zeb
Cia peb mus rau hauv grit. Lus. Cov 'xuab zeb' hauv cov xuab zeb casting tsis yog koj lub vaj ntau yam. Nws yog ib qho kev sib xyaw ua ke, feem ntau yog silica, zircon, lossis chromite, sib koom nrog av nplaum (ntsuab xuab zeb) lossis tshuaj binders (xws li furan lossis phenolic resin rau cov pwm tsis muaj ci). Qhov txawv yog hmo ntuj thiab nruab hnub. Rau txhuas, kuv lean ntawm chemically-bonded xuab zeb rau complex geometries los yog nruj tolerances. Ntsuab xuab zeb yog sai dua thiab pheej yig dua rau cov ntim siab, cov duab yooj yim, tab sis koj ua lag luam tawm ntawm qhov chaw tiav thiab qhov ruaj khov. Kev txawj ntse yog nyob rau hauv kev xaiv txoj cai system rau txoj hauj lwm. Ib qho pitfall? Piv txwv tias tag nrho cov xuab zeb yog tib yam. Kuv tau muaj cov khoom tawm los nrog cov hlab ntsha txaus ntshai vim tias cov xuab zeb thermal expansion tsis yog rau cov aluminium alloy lub solidification qauv. Nws siv sij hawm ntau lub lim tiam ntawm kev sim thiab ua yuam kev nrog cov xuab zeb sib txawv thiab cov ntawv sib piv los kho nws.
Kev tsim qauv yog lwm yam kev kos duab me me. Cov qauv ntoo yog qhov zoo rau cov qauv siv los yog luv luv, tab sis rau txhua yam kev txhawb nqa, koj xav tau cov qauv hlau lossis epoxy. Lub kaum sab xis, qhov ua tiav, qhov nyiaj pub rau shrinkage-txhua lub alloy shrinks ntawm tus nqi sib txawv-nws txhua tus tau ua rau tus qauv ntawd. Ib qho miscalculation ntawm ob peb feem pua ntawm shrinkage tuaj yeem ua rau tag nrho cov khoom tawm ntawm spec. Kuv nco qab ib pawg ntawm cov twj tso kua mis uas peb tau siv cov txheej txheem shrinkage txoj cai rau A356 txhuas, tab sis qhov kev hloov kho tshwj xeeb thiab qhov ntsuas kub hloov pauv nws tsuas yog txaus los ua qhov teeb meem haum nrog lub tshuab mating. Peb yuav tsum tau kho tus qauv, uas yog ib qho kev qhia siv nyiaj ntau thiab siv sijhawm ntev.
Tom qab ntawd muaj rooj vag thiab nce. Qhov no yog qhov chaw foundry qhov kev paub tiag tiag qhia. Koj tab tom tsim cov channel uas pub molten aluminium rau hauv pwm kab noj hniav thiab cov reservoirs uas pub shrinkage thaum nws txias. Cov rooj vag tsis zoo ua rau muaj kev kub ntxhov, uas ua rau cov oxide suav nrog thiab tsis muaj zog. Tsis txaus rising ua rau shrinkage porosity. Nws tsis yog phau ntawv txoj kev xav xwb; nws yog ib qho kev xav tsim los ntawm kev saib ntau txhiab tus txiav-up castings. Ib tug zoo foundry engineer tej zaum yuav tso ib tug me me riser qhov twg lub simulation software tsis chij qhov teeb meem, raws li ib tug ntshiab ntawm ib tug hunch los ntawm ib tug zoo xws li cov hauj lwm yav dhau los. Thiab lawv feem ntau yog lawm.
Qhov twg Aluminium Sand Casting Fits (Thiab qhov twg nws tsis)
Cov txheej txheem no tsis yog rau txhua yam. Rau siab ntim, nyias-walled, intricate qhov chaw zoo li turbine hniav, koj yuav saib peev casting los yog tuag casting. Tab sis rau qhov tsawg mus rau nruab nrab ntim, qhov loj dua (xav tias lub cav thaiv, kis tau tus mob, cov khoom siv loj), thiab qhov kev tsim qauv yooj yim yog qhov tseem ceeb, cov xuab zeb casting yog qhov zoo heev. Tus nqi cuab yeej yog ib feem ntawm kev tuag casting. Qhov chaw qab zib tiag tiag yog rau ib-tawm, cov qauv, thiab cov khoom hnyav-sectioned. Kuv tau ua haujlwm ntawm cov khoom siv hauv hiav txwv uas hnyav tshaj 200 kg uas tau zoo kawg nkaus rau cov xuab zeb casting. Sim ua li ntawd raws li kev tuag casting yuav txwv tsis pub kim.
Txawm li cas los xij, kev ua haujlwm tom qab casting yog qhov tseem ceeb. Ib aluminium sand casting qhov chaw uas kuj muaj nyob rau hauv-tsev machining yog ib tug loj kom zoo dua. Nws ua kom lawv nkag siab txog cov qauv casting thiab tuaj yeem npaj machining datums thiab nyiaj pub dawb los ntawm qhov pib. Qhov kev sib xyaw ua ke no tiv thaiv kev npau suav phem qhov twg ib feem cuam tshuam zoo nkauj tab sis tsis tuaj yeem tuav tau zoo rau CNC ua haujlwm, lossis qhov chaw tseem ceeb ntawm qhov chaw sib khi xaus rau hauv ib qho chaw ntxeem tau ntawm cov casting. Nws yog hais txog kev tswj cov txheej txheem los ntawm pwm mus rau qhov tiav.
Qhov no yog vim li cas lub tuam txhab qhov dav ntawm kev muaj peev xwm tseem ceeb. Coj ib tug ruaj zoo li Qingdao Qiangsenyuan Technology Co., Ltd. (QSY). Nrog ntau tshaj 30 xyoo nyob rau hauv casting thiab machining, lawv tau txais qhov txuas no. Lawv lub website, tsi.com, qhia tau hais tias lawv tuav ntau yam txheej txheem. Thaum lawv teev plhaub molding thiab peev casting raws li kev tshwj xeeb, cov ntsiab cai ntawm kev tsim pwm thiab metallurgy txhais. Lub tsev tsim khoom uas nkag siab txog qhov tseeb plhaub pwm yuav muaj kev qhuab qhia rau kev tswj cov xuab zeb thiab cov ntaub ntawv txheej txheem uas tau txais txiaj ntsig zoo rau lawv cov xuab zeb casting. Lawv ua hauj lwm nrog tshwj xeeb alloys xws li npib tsib xee-raws li sawv daws yuav qhia ib tug sib sib zog nqus metallurgical muaj peev xwm, uas yog invaluable thaum soj ntsuam nrog complex aluminium alloys zoo li high-silicon los yog high-magnesium qib uas yog tricky cam khwb cia yam tsis kub tearing.
Dab ntxwg nyoog nyob rau hauv cov ntsiab lus: Porosity, tiav, thiab tiag-lub ntiaj teb kev sib haum xeeb
Porosity yog kev sib ntaus sib tua nyob mus ib txhis hauv aluminium casting. Nws tuaj yeem yog roj porosity los ntawm cov av noo hauv cov xuab zeb lossis hydrogen hauv cov yaj, lossis shrinkage porosity los ntawm kev pub mis tsis txaus. Lub chaw tsim khoom muaj peev xwm yuav muaj cov txheej txheem degassing (xws li rotary degassing nrog argon) thiab kev tswj cov xuab zeb kom qhuav. Tab sis qee zaum, koj yuav tsum lees txais qee qib. Tus yuam sij yog txhais nws daim ntawv cog lus-siv ASTM lossis cov qauv zoo sib xws rau kev tshuaj xyuas hluav taws xob-thiab xyuas kom nws tsis nyob hauv qhov chaw tseem ceeb. Kuv tau pom zoo castings nrog qee qhov porosity cais nyob rau hauv cov cheeb tsam uas tsis yog cov qauv kom txuag tau lub sijhawm ua haujlwm, tab sis tsis txhob nyob ze ntawm lub qhov threaded lossis lub foob foob.
Surface finish yog lwm qhov kev xav. Raws li-casting nto los ntawm cov xuab zeb pwm muaj cov yam ntxwv zoo nkauj. Yog hais tias koj xav tau ib tug smoother tiav, nws yuav tsum tau blasting (steev los yog xuab zeb) los yog sib tsoo. Qhov no ntxiv tus nqi. Tus tsim yuav tsum qhia meej tias qhov chaw twg yog 'as-cam khwb cia' thiab qhov twg yog 'machined'. Kuv tau pom cov duab kos uas hu rau qhov tsis muaj tseeb 3.2 μm Ra ntawm qhov chaw pov tseg-nws tsuas yog ua tsis tau. Kev sib txuas lus meej ntawm no yuav txuag kev ntxhov siab ntau tom qab.
Kev kho cua sov yuav luag yog muab rau feem ntau engineering-qib txhuas xuab zeb castings xws li A356 lossis A357. Nws tau ua tiav kom ua tiav qhov xav tau kev npau taws (T6 yog qhov ntau). Tab sis lub foundry txoj kev sib raug zoo nrog lub tshav kub kho teeb meem. Yog tias lawv yog cov chaw sib cais, kev cuam tshuam tuaj yeem dhau los ua kev ua txhaum cai. Puas yog qhov casting qhov seem kev ntxhov siab lossis kev kho thaum lub sij hawm kho cua sov? Ib qho chaw sib koom ua ke, lossis tsawg kawg yog kev sib koom ua ke nruj, ua kom yooj yim rau qhov no. Lub hom phiaj yog qhov ruaj khov, tag nrho cov cua sov kho tau npaj rau qhov kawg machining.
Case in Point: Kawm los ntawm Zej Zog
Cia kuv piav qhia txog qhov xwm txheej tiag tiag, me ntsis tsis qhia npe. Peb muaj lub chassis tivthaiv rau lub tsheb tshwj xeeb. Tus tsim yog complex, nrog txawv phab ntsa thicknesses thiab ob peb cored passages. Peb tau mus nrog lub koob npe nrov aluminium sand casting qhov chaw. Thawj tus qauv dhau qhov kev kuaj pom thiab qhov loj me. Tab sis thaum lub sij hawm tsim qauv, lub pob ntseg mounted snapped thaum lub sij hawm torque-down. Kev soj ntsuam tsis ua tiav tau nthuav tawm qhov txias kaw - qhov tsis sib xws uas ob lub kwj hlau tau ntsib tab sis tsis fuse kom raug - txoj cai ntawm lub hauv paus muaj kev ntxhov siab ntawm pob ntseg.
Lub hauv paus ua rau? Lub rooj vag tsim tau sau cov seem ntawm cov pwm kawg, thiab cov hlau tau poob ntau heev. Lub foundry qhov kev simulation thawj zaug tau teeb tsa qhov teeb meem, tab sis nws tau pom tias muaj kev pheej hmoo tsawg. Qhov kho tsis yog tsuas yog ntxiv hlau ntxiv; nws tau redesigning lub rooj vag los hloov tus qauv sau thiab kho qhov pouring kub rau qhov tshwj xeeb alloy batch. Nws ncua qhov project los ntawm ib hlis. Zaj lus qhia yog ob zaug: tsis txhob tsis quav ntsej txawm tias cov lus ceeb toom me me, thiab ib txwm qhia thiab ua cov kua dej nkag los yog ntsuas hluav taws xob ntawm qhov chaw muaj kev ntxhov siab hauv thawj kab lus tshuaj xyuas, txawm tias nws tsis nyob hauv tus qauv spec.
Qhov no yog qhov chaw nrhiav kev daws teeb meem kab lis kev cai raug sim. Cov zoo tsis tiv thaiv. Lawv dhia hauv, txiav cov casting, txheeb xyuas qhov tsis xws luag, thiab tawm tswv yim txog kev daws teeb meem. Lawv kho nws raws li kev sib tw engineering. Cov tsis zoo taw tes ntiv tes ntawm cov khoom siv hlau lossis cov qauv tsim. Lub foundry uas ua raws li ib tug khub yog tsim nyog nws hnyav nyob rau hauv kub.
Saib tom ntej: Lub Niche yog ruaj ntseg
Nrog rau tag nrho cov lus hais txog 3D luam ntawv rau pwm thiab ncaj qha hlau luam ntawv, yog aluminium xuab zeb casting tsis siv lawm? deb ntawm nws. Rau ntau lawm ntau tshaj ib tug handful, nws tseem vastly ntau economical. Cov technologies yog converging, ho. Kuv tau pom hybrid mus kom ze qhov twg 3D-luam cov xuab zeb cores siv rau impossibly complex nyob rau hauv ib txwm xuab zeb pwm. Qhov no qhib tshiab tsim kev ywj pheej thaum khaws cov txheej txheem ntau tus nqi-zoo.
Lub neej yav tom ntej ntawm ib tug ua tiav foundry nyob rau hauv no hom ntawm adaptability. Kev sib xyaw cov khoom siv ib txwm siv-kev xav rau cov xuab zeb, lub qhov muag rau kev ua kom muaj zog-nrog kev simulation niaj hnub, kev saib xyuas cov txheej txheem, thiab cov thev naus laus zis ntxiv xws li CNC machining. Nws yog hais txog muab tag nrho cov kev daws teeb meem. Ib lub tuam txhab uas tau hloov zuj zus los ntawm lub chaw tsim khoom ntshiab mus rau cov chaw tsim khoom sib xyaw, xws li QSY nrog nws cov lus tshaj tawm kaum xyoo hauv ob qho tib si casting thiab machining, yog positioned rau qhov no. Lawv nkag siab tias qhov casting feem ntau tsuas yog thawj kauj ruam hauv kev xa cov khoom siv ua haujlwm.
Yog li, thaum koj ntsuas ib qho aluminium sand casting qhov chaw, saib tshaj tus nqi ib kilogram. Saib ntawm lawv cov qauv khw, lawv cov xuab zeb lab, lawv cov txheej txheem tswj kom zoo rau cov chemistry yaj thiab kev sim tshuab, thiab qhov tseem ceeb, lawv txaus siab los koom nrog cov txheej txheem tsim thaum ntxov. Nug cov ntaub ntawv tshawb fawb txog qhov nyuaj. Qhov kev ua haujlwm zoo tshaj plaws yog los ntawm cov foundries uas pom lawv tus kheej tsis yog hlau pourers, tab sis raws li kev tsim cov koom tes daws teeb meem geometry thiab cov khoom siv. Qhov kev xav ntawd ua rau txhua qhov sib txawv ntawm ib feem uas ua haujlwm thiab ib qho uas xaus li khoom kim heev.
