Vuam yog hais txog kev sib koom ua ke lossis kev sib txuas ntawm cov khoom los ntawm kev siv cua sov thiab / lossis compression kom cov khoom sib txuas ua ke.Lub hauv paus ntawm cov cua sov hauv vuam feem ntau yog cov nplaim hluav taws uas ua los ntawm cov hluav taws xob ntawm lub vuam fais fab.Arc-based welding yog hu ua arc vuam.
Kev sib xyaw ntawm cov khoom tuaj yeem tshwm sim tsuas yog raws li cov cua sov uas tsim los ntawm cov arc kom cov welding pieces melts ua ke.Cov qauv no tuaj yeem siv rau hauv TIG vuam, piv txwv li.
Feem ntau, cov hlau muab tub lim yog, txawm li cas los xij, melted rau hauv vuam seam, los yog weld, yog siv ib tug hlau feeder los ntawm vuam phom (MIG/MAG welding) los yog los ntawm kev siv phau ntawv-feed vuam electrode.Hauv qhov xwm txheej no, cov hlau muab tub lim yuav tsum muaj kwv yees li qhov sib npaug ntawm cov khoom siv welded.
Ua ntej pib nrog vuam, cov npoo ntawm cov khoom siv vuam yog zoo li lub vuam zawj, piv txwv li, V groove.Raws li cov vuam txuas ntxiv, lub arc fuses ua ke ntawm cov npoo ntawm qhov zawj thiab cov muab tub lim, tsim kom muaj lub pas dej molten weld.
Txhawm rau kom cov vuam kom ruaj khov, lub pas dej molten weld yuav tsum tau tiv thaiv los ntawm oxygenation thiab cuam tshuam ntawm cov huab cua nyob ib puag ncig, piv txwv li nrog shielding gases los yog slag.Lub shielding gas yog pub rau hauv lub molten weld pas dej ua ke nrog lub vuam teeb.Lub vuam electrode kuj yog coated nrog cov khoom uas ua rau shielding roj thiab slag hla lub molten weld pas dej ua ke.
Cov khoom siv welded feem ntau yog hlau, xws li txhuas, me me hlau, thiab stainless hlau.Tsis tas li ntawd, cov yas tuaj yeem welded.Nyob rau hauv cov yas welding, lub tshav kub yog cua kub los yog hluav taws xob resistor.
WELDING ARC
Lub vuam arc xav tau nyob rau hauv vuam yog tawg ntawm hluav taws xob nruab nrab ntawm vuam electrode thiab vuam daim.Lub arc yog generated thaum ib tug txaus voltage mem tes yog generated ntawm daim.Nyob rau hauv TIG welding qhov no tuaj yeem ua tiav los ntawm kev siv hluav taws xob los yog thaum cov khoom siv welded raug ntaus nrog cov vuam electrode (strike ignition).
Yog li, qhov hluav taws xob raug tso tawm zoo li lub bolt ntawm xob laim tso cai rau cov hluav taws xob ntws los ntawm qhov sib txawv ntawm huab cua, uas tsim ib qho arc nrog qhov kub ntawm ntau txhiab degrees centigrade, qhov siab tshaj plaws li 10,000 ⁰Cdegrees (18,000 degrees Fahrenheit).Ib qho txuas txuas tam sim no los ntawm vuam fais fab mov mus rau lub workpiece yog tsim los ntawm vuam electrode, thiab yog li ntawd lub workpiece yuav tsum tau grounded nrog ib tug grounding cable nyob rau hauv lub vuam tshuab ua ntej vuam pib.
Hauv MIG / MAG welding lub arc yog tsim los thaum cov khoom siv muab tub lim kov rau saum npoo ntawm qhov chaw ua haujlwm thiab tsim hluav taws xob luv luv.Tom qab ntawd cov hluav taws xob luv luv tam sim no melts qhov kawg ntawm cov xaim xaim thiab lub vuam arc raug tsim.Rau ib tug du thiab ruaj khov weld, vuam arc yuav tsum ruaj khov.Yog li ntawd nws yog ib qho tseem ceeb nyob rau hauv MIG / MAG vuam uas ib tug vuam voltage thiab hlau pub tus nqi haum rau cov ntaub ntawv weld thiab lawv thicknesses yog siv.
Tsis tas li ntawd, cov txheej txheem ua haujlwm ntawm cov welder cuam tshuam rau qhov smoothness ntawm arc thiab, tom qab, qhov zoo ntawm cov vuam.Qhov kev ncua deb ntawm qhov vuam electrode los ntawm qhov zawj thiab qhov nrawm ntawm qhov vuam vuam yog qhov tseem ceeb rau kev ua tiav vuam.Kev ntsuam xyuas qhov tseeb voltage thiab xaim pub ceev yog ib feem tseem ceeb ntawm cov welder lub peev xwm.
Cov tshuab vuam niaj hnub no, txawm li cas los xij, muaj ntau yam uas ua rau cov vuam ua haujlwm tau yooj yim dua, xws li txuag cov khoom siv vuam yav dhau los lossis siv cov txheej txheem sib koom ua ke, uas ua rau nws yooj yim dua los teeb tsa cov vuam tsis ua haujlwm ntawm tes.
SHIELDING GAS hauv welding
Lub shielding gas feem ntau plays lub luag haujlwm tseem ceeb hauv kev tsim khoom thiab zoo ntawm vuam.Raws li nws lub npe qhia, lub shielding gas shields lub solidifying molten weld los ntawm oxygenation nrog rau impurities thiab ya raws nyob rau hauv cov huab cua, uas tej zaum yuav tsis muaj zog corrosion-tolerance ntawm lub weld, tsim ntxeem tau, thiab tsis muaj zog lub durability ntawm weld los ntawm kev hloov lub welding. geometrical nta ntawm kev sib koom ua ke.Lub shielding gas kuj cools down lub vuam phom.Cov khoom siv tiv thaiv ntau tshaj plaws yog argon, helium, carbon dioxide, thiab oxygen.
Lub shielding gas yuav inert los yog active.Ib qho roj inert tsis hnov mob nrog cov molten weld txhua lub sijhawm thaum cov roj nquag koom nrog hauv cov txheej txheem vuam los ntawm kev ruaj khov ntawm arc thiab ruaj ntseg cov khoom xa mus rau qhov vuam.Inert gas siv hauv MIG welding (hlau-arc inert gas welding) thaum cov roj nquag siv hauv MAG vuam (hlau-arc nquag roj vuam).
Ib qho piv txwv ntawm cov roj inert yog argon, uas tsis hnov mob nrog cov molten weld.Nws yog feem ntau siv shielding roj hauv TIG vuam.Cov pa roj carbon dioxide thiab oxygen, txawm li cas los xij, ua rau cov molten weld zoo li kev sib xyaw ntawm carbon dioxide thiab argon.
Helium (Nws) kuj yog ib qho roj tiv thaiv tsis muaj zog.Helium thiab helium-argon sib tov yog siv hauv TIG thiab MIG vuam.Helium muab kev nkag mus rau sab zoo dua thiab ntau dua vuam ceev piv rau argon.
Cov pa roj carbon dioxide (CO2) thiab cov pa oxygen (O2) yog cov roj siv hluav taws xob siv los ua cov khoom siv oxygenating kom ruaj khov thiab ua kom cov khoom sib kis tau zoo hauv MAG vuam.Qhov kev faib ua feem ntawm cov khoom siv roj no hauv cov roj tiv thaiv yog txiav txim siab los ntawm hom hlau.
NORMS thiab Standards nyob rau hauv vuam
Ntau cov qauv thoob ntiaj teb thiab cov qauv siv rau cov txheej txheem vuam thiab cov qauv thiab cov yam ntxwv ntawm vuam tshuab thiab cov khoom siv.Lawv muaj cov ntsiab lus, cov lus qhia, thiab kev txwv rau cov txheej txheem thiab cov qauv siv tshuab kom muaj kev nyab xeeb ntawm cov txheej txheem thiab cov tshuab thiab ua kom cov khoom zoo.
Piv txwv li, tus qauv dav dav rau arc vuam tshuab yog IEC 60974-1 thaum cov ntsiab lus ntawm kev xa khoom thiab cov khoom siv, qhov ntev, qhov siab ntev, thiab cov ntawv sau muaj nyob rau hauv tus qauv SFS-EN 759.
Kev nyab xeeb hauv vuam
Muaj ntau yam kev pheej hmoo uas txuas nrog vuam.Lub arc emits lub teeb ci heev thiab hluav taws xob ultraviolet, uas yuav ua rau lub qhov muag puas.Molten hlau splashes thiab sparks tuaj yeem hlawv daim tawv nqaij thiab ua rau muaj kev pheej hmoo ntawm hluav taws, thiab cov pa taws uas tsim los ntawm vuam tuaj yeem ua rau muaj kev phom sij thaum nqus tau.
Cov kev phom sij no tuaj yeem zam tau, txawm li cas los xij, los ntawm kev npaj rau lawv thiab siv cov cuab yeej tiv thaiv tsim nyog.
Kev tiv thaiv hluav taws kub hnyiab tuaj yeem ua tiav los ntawm kev txheeb xyuas qhov chaw ntawm qhov chaw vuam ua ntej thiab tshem tawm cov khoom siv hluav taws xob los ntawm qhov ze ntawm qhov chaw.Tsis tas li ntawd, cov khoom siv tua hluav taws yuav tsum tau yooj yim.Cov neeg sab nrauv tsis raug tso cai nkag mus rau thaj tsam txaus ntshai.
Qhov muag, pob ntseg, thiab tawv nqaij yuav tsum tau tiv thaiv nrog cov iav tiv thaiv tsim nyog.Lub npog ntsej muag nrog lub ntsej muag tsis pom kev tiv thaiv lub qhov muag, plaub hau, thiab pob ntseg.Cov hnab looj tes tawv tawv thiab cov hnab looj tes ruaj khov, tsis muaj nplaim taws tiv thaiv caj npab thiab lub cev los ntawm cov pa taws thiab cua sov.
Vuam fumes tuaj yeem zam tau nrog qhov cua txaus ntawm qhov chaw ua haujlwm.
WELDING MUAB
Vuam txoj kev tuaj yeem raug cais los ntawm txoj kev siv los ua cov vuam cua sov thiab txoj kev cov khoom muab tub lim yog pub rau hauv vuam.Cov txheej txheem vuam siv yog xaiv raws li cov ntaub ntawv yuav tsum tau welded thiab cov khoom tuab, qhov yuav tsum tau ua kom zoo, thiab qhov xav tau kev pom zoo ntawm vuam.
Txoj kev siv vuam feem ntau yog MIG / MAG vuam, TIG vuam, thiab lo (manual hlau arc) vuam.Cov txheej txheem qub tshaj plaws, feem ntau paub, thiab tseem muaj cov txheej txheem tseem ceeb yog MMA phau ntawv hlau arc vuam, uas feem ntau siv rau hauv cov chaw ua haujlwm thiab cov chaw sab nraum zoov uas xav tau kev ncav cuag tau zoo.
TIG vuam txoj kev qeeb qeeb tso cai rau kev tsim cov vuam zoo heev, thiab yog li ntawd nws yog siv rau hauv welds uas yuav pom lossis xav tau qhov tseeb.
MIG/MAG welding yog ib txoj kev vuam ntau yam, uas cov khoom siv muab tub lim yuav tsum tsis txhob muab cais pub rau hauv cov molten weld.Es tsis txhob, cov hlau khiav los ntawm cov phom welding ib puag ncig los ntawm cov roj tiv thaiv ncaj qha mus rau hauv cov molten weld.
Kuj tseem muaj lwm txoj kev vuam tsim nyog rau cov kev xav tau tshwj xeeb, xws li laser, plasma, qhov chaw, submerged arc, ultrasound, thiab kev sib txhuam vuam.
Post lub sij hawm: Mar-12-2022