Casting thiab forging txheej txheem

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Hauv kev ua haujlwm hlau, casting yog txheej txheem uas cov kua hlau xa mus rau hauv pwm (feem ntau yog los ntawm lub crucible) uas muaj cov kev xav tsis zoo (piv txwv li, daim duab peb sab tsis zoo) ntawm lub hom phiaj.


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Kev taw qhia txog qhov casting thiab forging qhov chaw

Hauv kev ua haujlwm hlau, casting yog txheej txheem uas cov kua hlau xa mus rau hauv pwm (feem ntau yog los ntawm lub crucible) uas muaj cov kev xav tsis zoo (piv txwv li, daim duab peb sab tsis zoo) ntawm lub hom phiaj.Cov hlau yog poured rau hauv pwm los ntawm ib tug hollow channel hu ua ib tug sprue.Cov hlau thiab pwm yog tom qab ntawd txias, thiab cov hlau seem (cov casting) raug rho tawm.Casting feem ntau yog siv los ua cov duab nyuaj uas yuav nyuaj lossis tsis yooj yim los ua los ntawm lwm txoj hauv kev.
Cov txheej txheem Casting tau paub ntau txhiab xyoo, thiab tau siv dav rau cov duab puab (tshwj xeeb yog cov tooj liab), cov hniav nyiaj hniav kub hauv cov hlau zoo nkauj, thiab riam phom thiab cov cuab yeej.Cov khoom siv hluav taws xob zoo tshaj plaws muaj nyob hauv 90 feem pua ​​​​ntawm cov khoom siv ruaj khov, suav nrog tsheb, tsheb thauj khoom, aerospace, tsheb ciav hlau, mining thiab siv cov cuab yeej siv, roj qhov dej, khoom siv, kav dej, hydrants, cua turbines, nuclear nroj tsuag, khoom siv kho mob, khoom tiv thaiv, khoom ua si, thiab ntau.

Cov txheej txheem ib txwm muaj xws li ploj-wax casting (uas tuaj yeem muab faib ntxiv rau hauv centrifugal casting, thiab lub tshuab nqus tsev pab ncaj qha rau casting), plaster pwm casting thiab xuab zeb casting.

Cov txheej txheem casting niaj hnub no tau muab faib ua ob pawg loj: expendable thiab non-expendable casting.Nws tau tawg ntxiv los ntawm cov khoom siv pwm, xws li cov xuab zeb lossis hlau, thiab cov txheej txheem nchuav, xws li lub ntiajteb txawj nqus, lub tshuab nqus tsev, lossis tsis tshua muaj siab.

Forging yog cov txheej txheem tsim khoom uas muaj cov txheej txheem ntawm cov hlau siv hauv zos compressive zog.Lub tshuab yog xa nrog rauj (feem ntau lub zog rauj) lossis tuag.Forging feem ntau yog cais raws li qhov kub ntawm qhov uas nws tau ua: txias forging (ib hom kev ua haujlwm txias), sov forging, lossis kub forging (ib hom kev ua haujlwm kub).Rau ob qhov kawg, cov hlau yog rhuab, feem ntau nyob rau hauv ib tug forge.Forged qhov chaw muaj peev xwm nyob rau hauv qhov hnyav ntawm tsawg tshaj li ib kilogram mus rau pua pua metric tons.Forging tau ua los ntawm smiths rau millennia;Cov khoom siv niaj hnub yog cov khoom siv hauv chav ua noj, khoom siv kho mob, cov cuab yeej tes, riam phom, cymbals, thiab jewellery.Txij li thaum muaj kiv puag ncig, forged qhov chaw yog dav siv nyob rau hauv mechanisms thiab tshuab nyob qhov twg ib tug tivthaiv yuav tsum tau muaj zog;xws li forgings feem ntau yuav tsum tau ua ntxiv (xws li machining) kom ua tiav ib feem yuav luag tiav.Niaj hnub no, forging yog kev lag luam loj thoob ntiaj teb

Expendable pwm casting thiab forging qhov chaw

Expendable pwm casting yog ib qho kev faib tawm uas suav nrog xuab zeb, yas, plhaub, plaster, thiab peev (poob-wax txheej txheem) moldings.Cov txheej txheem ntawm pwm casting no suav nrog kev siv cov pwm ib ntus, tsis siv dua tshiab.

Casting and forging process001

Txawv txheej txheem ntawm casting thiab forging

Xuab zeb casting
Xuab zeb casting yog ib qho nrov tshaj plaws thiab yooj yim tshaj plaws ntawm casting, thiab tau siv rau ntau pua xyoo.Xuab zeb casting tso cai rau cov khoom me me dua li cov pwm mus tas li thiab ntawm tus nqi tsim nyog heev.Tsis tsuas yog txoj kev no tso cai rau cov tuam txhab tsim cov khoom lag luam ntawm tus nqi qis, tab sis muaj lwm yam txiaj ntsig rau xuab zeb casting, xws li kev ua haujlwm me me.Cov txheej txheem tso cai rau castings me me txaus haum nyob rau hauv xib-teg ntawm ib txhais tes rau cov loj txaus xwb rau lub tsheb ciav hlau txaj (ib tug casting tuaj yeem tsim tag nrho lub txaj rau ib lub tsheb ciav hlau).Xuab zeb casting kuj tso cai rau feem ntau cov hlau yuav raug nrum nyob ntawm seb hom xuab zeb siv rau pwm.

Xuab zeb casting yuav tsum tau ua lub sij hawm ua cov hnub, los yog lub lis piam qee zaum, rau kev tsim khoom ntawm cov zis siab (1-20 pieces / hr-pwm) thiab yog unsurpassed rau cov khoom loj.Ntsuab (ntub) xuab zeb, uas yog xim dub, yuav luag tsis muaj qhov hnyav txwv, thaum cov xuab zeb qhuav muaj qhov ua tau zoo ntawm 2,300-2,700 kg (5,100-6,000 lb).Yam tsawg kawg nkaus qhov hnyav ntawm 0.075–0.1 kg (0.17–0.22 lb).Cov xuab zeb yog sib koom siv cov av nplaum, cov tshuaj binders, los yog cov roj polymerized (xws li cov roj cav).Xuab zeb tuaj yeem siv tau ntau zaus hauv kev ua haujlwm feem ntau thiab yuav tsum tau saib xyuas me ntsis.

Loam molding
Loam molding tau siv los tsim cov khoom loj symmetrical xws li cannon thiab pawg ntseeg tswb.Loam yog sib tov ntawm av nplaum thiab xuab zeb nrog straw los yog dung.Ib qho qauv ntawm cov khoom tsim yog tsim nyob rau hauv cov khoom friable (cov chemise).Lub pwm yog tsim nyob ib ncig ntawm no chemise los ntawm npog nws nyob rau hauv loam.Qhov no yog tom qab ntawd ci (ntxuav tawm) thiab cov chemical tshem tawm.Cov pwm ces sawv ntsug nyob rau hauv ib lub qhov taub nyob rau hauv pem hauv ntej ntawm lub cub tawg rau cov hlau yuav tsum tau poured.Tom qab ntawd cov pwm yog tawg.Pwm tuaj yeem siv tau ib zaug nkaus xwb, yog li ntawd lwm txoj kev nyiam rau ntau lub hom phiaj.

Plaster pwm casting
Plaster casting zoo ib yam li xuab zeb casting tshwj tsis yog tias plaster ntawm paris yog siv es tsis txhob xuab zeb ua cov khoom pwm.Feem ntau, daim ntawv yuav siv sij hawm tsawg tshaj li ib lub lim tiam los npaj, tom qab uas qhov ntau lawm ntawm 1-10 units / hr-pwm yog tiav, nrog cov khoom loj li 45 kg (99 lb) thiab me me li 30 g (1 oz) nrog zoo heev nto tiav thiab nyob ze tolerances.[5]Plaster casting yog ib qho pheej yig dua lwm txoj kev molding rau cov khoom nyuaj vim yog tus nqi qis ntawm plaster thiab nws lub peev xwm los tsim ze li ntawm cov duab castings.Qhov tsis zoo tshaj plaws yog tias nws tsuas yog siv tau nrog cov khoom siv uas tsis tshua muaj melting uas tsis yog-ferrous, xws li txhuas, tooj liab, magnesium, thiab zinc.

Plhaub molding
Plhaub molding zoo ib yam li cov xuab zeb casting, tab sis lub molding kab noj hniav yog tsim los ntawm ib tug hardened "plhaub" ntawm cov xuab zeb es tsis txhob ntawm ib lub khob ntim nrog xuab zeb.Cov xuab zeb siv yog finer tshaj xuab zeb casting xuab zeb thiab yog tov nrog ib tug resin kom nws yuav tsum tau rhuab los ntawm cov qauv thiab hardened rau hauv ib lub plhaub nyob ib ncig ntawm tus qauv.Vim yog cov resin thiab finer xuab zeb, nws muab ib tug ntau finer nto tiav.Cov txheej txheem yog yooj yim automated thiab ntau meej tshaj xuab zeb casting.Cov hlau uas tau cam khwb cia muaj xws li cam khwb cia hlau, aluminium, magnesium, thiab tooj liab alloys.Cov txheej txheem no yog qhov zoo tagnrho rau cov khoom nyuaj uas me me mus rau nruab nrab.

Kev nqis peev casting
Kev nqis peev casting (lub npe hu ua ploj-wax casting hauv kev kos duab) yog txheej txheem uas tau siv ntau txhiab xyoo, nrog cov txheej txheem ploj-wax yog ib qho ntawm cov txheej txheem qub tshaj plaws uas paub txog kev tsim hlau.Los ntawm 5000 xyoo dhau los, thaum beeswax tsim tus qauv, rau niaj hnub no cov cuab yeej siv siab, cov ntaub ntawv refractory, thiab cov alloys tshwj xeeb, cov castings ua kom cov khoom zoo yog tsim nrog cov txiaj ntsig tseem ceeb ntawm qhov raug, rov ua dua, ntau yam, thiab kev ncaj ncees.
Kev nqis peev casting muab nws lub npe los ntawm qhov tseeb tias tus qauv yog nqis peev, lossis ib puag ncig, nrog cov khoom siv refractory.Cov qauv siv quav ciab xav tau kev saib xyuas hnyav rau lawv tsis muaj zog txaus los tiv thaiv cov rog thaum lub sijhawm ua pwm.Ib qho txiaj ntsig ntawm kev nqis peev casting yog qhov siv quav ciab tuaj yeem rov qab siv dua.

Cov txheej txheem tsim nyog rau kev rov ua dua tshiab ntawm cov khoom sib txuas los ntawm ntau yam hlau sib txawv thiab kev ua haujlwm siab alloys.Txawm hais tias feem ntau yog siv rau me me castings, cov txheej txheem no tau siv los ua tiav qhov rooj dav hlau qhov rooj, nrog cov hlau castings txog li 300 kg thiab aluminium castings txog li 30 kg.Piv rau lwm cov txheej txheem casting xws li tuag casting lossis xuab zeb casting, nws tuaj yeem yog cov txheej txheem kim.Txawm li cas los xij, cov khoom lag luam uas tuaj yeem tsim los siv peev casting tuaj yeem suav nrog cov duab sib txawv, thiab feem ntau cov khoom raug cam khwb cia ze ze ntawm cov duab, yog li yuav tsum tau me me los yog tsis muaj rework ib zaug cam khwb cia.

Qhov zoo thiab qhov tsis zoo ntawm forging qhov chaw

Forging tuaj yeem tsim ib daim uas muaj zog tshaj qhov sib npaug cam khwb cia lossis machined ib feem.Raws li cov hlau yog zoo li tus thaum lub sij hawm forging txheej txheem, nws internal grain kev ntxhib los mos deforms ua raws li cov qauv ntawm ib feem.Yog li ntawd, qhov kev ntxhib los mos variation yog tas mus li thoob plaws hauv ib feem, muab nce mus rau ib daim nrog zoo zog cov yam ntxwv. Tsis tas li ntawd, forgings tuaj yeem ua tiav tus nqi qis dua li casting lossis fabrication.Xav txog tag nrho cov nqi uas tshwm sim hauv cov khoom lag luam lub neej voj voog los ntawm kev yuav khoom mus rau lub sijhawm ua haujlwm rov ua dua, thiab ua rau cov nqi ntawm cov khoom seem, thiab cov sijhawm poob thiab lwm yam kev xav zoo, cov txiaj ntsig ntev ntawm forgings tuaj yeem tshaj qhov luv nqi txuag. uas castings los yog fabrications yuav muab.

Qee cov hlau yuav yog forged txias, tab sis hlau thiab hlau yuav luag ib txwm kub forged.Kub forging tiv thaiv kev ua hauj lwm hardening uas yuav tshwm sim los ntawm txias forming, uas yuav ua rau kom qhov nyuaj ntawm kev ua hauj lwm machining theem nrab ntawm daim.Tsis tas li ntawd, thaum ua hauj lwm hardening tej zaum yuav xav tau nyob rau hauv qee qhov xwm txheej, lwm txoj hauv kev ua kom tawv tawv, xws li kev kho cua sov, feem ntau yog kev lag luam thiab tswj tau ntau dua.Alloys uas yog amenable rau nag lossis daus hardening, xws li feem ntau aluminium alloys thiab titanium, tuaj yeem kub forged, ua raws li hardening.

Kev tsim khoom forging suav nrog kev siv nyiaj tseem ceeb rau cov tshuab, cuab yeej, chaw thiab cov neeg ua haujlwm.Nyob rau hauv cov ntaub ntawv ntawm kub forging, ib tug high-temperature rauv (qee zaum hu ua forge) yog yuav tsum tau rau cua sov ingots los yog billets.Raws li qhov loj ntawm forging rauj thiab nias thiab cov khoom uas lawv tuaj yeem tsim tau, nrog rau cov kev phom sij uas muaj nyob hauv kev ua haujlwm nrog cov hlau kub, ib lub tsev tshwj xeeb feem ntau yuav tsum tau ua haujlwm hauv tsev.Nyob rau hauv cov ntaub ntawv ntawm kev poob forging kev khiav hauj lwm, cov kev cai yuav tsum tau ua kom nqus tau cov shocks thiab vibration generated los ntawm rauj.Feem ntau cov kev ua haujlwm forging siv cov hlau tsim tuag, uas yuav tsum tau ua tib zoo tshuab thiab ua tib zoo kho cov cua sov kom raug cov khoom ua haujlwm kom raug, nrog rau kev tiv thaiv lub zog loj heev.

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