Lub arsenal ntawm vuam arsenals muaj los tiv thaiv kev kho hlau ua hauj lwm tau loj hlob exponentially nyob rau hauv lub xyoo, nrog rau cov welder daim ntawv teev cov tsiaj ntawv.
Yog tias koj muaj hnub nyoog tshaj 50 xyoo, tej zaum koj tau kawm yuav ua li cas rau vuam nrog SMAW (Shielded Hlau Arc lossis Electrode) vuam tshuab.
Xyoo 1990 tau coj peb txoj kev yooj yim ntawm MIG (hlau inert gas) los yog FCAW (flux-cored arc vuam) vuam, uas ua rau muaj ntau tus buzzers so haujlwm. Tsis ntev los no, TIG (tungsten inert gas) thev naus laus zis tau ua nws txoj hauv kev mus rau hauv khw muag khoom ua liaj ua teb raws li txoj hauv kev zoo tshaj plaws rau fuse cov ntawv hlau, txhuas thiab stainless hlau.
Kev loj hlob ntawm ntau lub hom phiaj welders tam sim no txhais tau hais tias tag nrho plaub txheej txheem tuaj yeem siv rau hauv ib pob.
Hauv qab no yog cov kev kawm luv luv uas yuav txhim kho koj cov kev txawj ntse kom tau txais txiaj ntsig zoo, txawm tias koj siv cov txheej txheem vuam dab tsi.
Jody Collier tau mob siab rau nws txoj haujlwm rau vuam thiab kev cob qhia welder. Nws lub vev xaib Weldingtipsandtricks.com thiab Vuam-TV.com tau sau nrog cov lus qhia thiab kev ua kom yuam kev rau txhua hom vuam.
Cov roj uas nyiam tshaj rau MIG vuam yog carbon dioxide (CO2). Txawm hais tias CO2 yog kev lag luam thiab zoo tagnrho rau kev tsim cov welds sib sib zog nqus hauv cov hlau tuab, cov roj tiv thaiv no tuaj yeem kub dhau thaum vuam cov hlau nyias. Yog vim li cas Jody Collier xav kom hloov mus rau qhov sib xyaw ntawm 75% argon thiab 25% carbon dioxide.
"Huag, koj tuaj yeem siv cov ntshiab argon rau MIG vuam aluminium lossis hlau, tab sis tsuas yog cov ntaub ntawv nyias heev," nws hais. "Txhua yam yog phem welded nrog ntshiab argon."
Collier sau tseg tias muaj ntau cov roj sib tov ntawm lub khw, xws li helium-argon-CO2, tab sis qee zaum lawv nyuaj nrhiav thiab kim.
Yog tias koj tab tom kho cov hlau tsis muaj steel hauv ib lub teb, koj yuav tsum tau ntxiv ob qhov sib xyaw ntawm 100% argon lossis argon thiab helium rau vuam aluminium thiab sib xyaw ntawm 90% argon, 7.5% helium thiab 2.5% carbon dioxide.
Lub permeability ntawm MIG weld nyob ntawm cov roj shielding. Cov pa roj carbon dioxide (sab saum toj sab xis) muab qhov sib sib zog nqus nqus vuam piv rau argon-CO2 (sab laug sab laug).
Ua ntej arcing thaum kho aluminium, nco ntsoov ntxuav lub vuam kom huv si kom tsis txhob rhuav tshem cov vuam.
Kev ntxuav vuam yog qhov tseem ceeb vim tias alumina melts ntawm 3700 ° F thiab cov hlau hauv paus yaj ntawm 1200 ° F. Yog li ntawd, txhua yam oxide (oxidation los yog dawb corrosion) los yog roj nyob rau ntawm qhov chaw kho yuav tiv thaiv kev nkag mus ntawm cov hlau muab tub lim.
Kev tshem tawm rog ua ntej. Tom qab ntawd, thiab tsuas yog tom qab ntawd, yuav tsum tshem tawm cov kab mob oxidative. Tsis txhob hloov qhov kev txiav txim, ceeb toom Joel Otter ntawm Miller Electric.
Nrog rau qhov muaj koob meej ntawm cov tshuab vuam hlau nyob rau xyoo 1990, cov neeg siv khoom sim thiab qhov tseeb beehive welders raug yuam kom sau cov plua plav hauv cov ces kaum ntawm cov khw.
Tsis zoo li cov qub buzzers uas tau siv rau kev ua haujlwm tam sim no (AC) nkaus xwb, cov welders niaj hnub ua haujlwm ntawm ob qho tib si alternating tam sim no thiab ncaj qha tam sim no (DC), hloov cov vuam polarity 120 zaug ib ob.
Cov txiaj ntsig tau muab los ntawm qhov kev hloov pauv nrawm nrawm no yog qhov loj, suav nrog kev pib yooj yim dua, tsis muaj kev sib txuas, tsis tshua muaj tawg, zoo nkauj dua welds, thiab yooj yim dua ntsug thiab nyiaj siv ua haujlwm vuam.
Ua ke nrog qhov tseeb tias cov nplaum nplaum tsim cov welds sib sib zog nqus, nws yog qhov zoo rau kev ua haujlwm sab nraum zoov (MIG shielding gas yog cua tshuab), ua haujlwm zoo nrog cov ntaub ntawv tuab, thiab hlawv los ntawm xeb, av, thiab xim. Vuam tshuab kuj yog portable thiab yooj yim rau kev khiav lag luam, yog li koj tuaj yeem pom yog vim li cas lub tshuab electrode tshiab lossis ntau lub tshuab welding yog tsim nyog rau kev nqis peev.
Joel Orth ntawm Miller Electric muaj cov nram qab no electrode pointers. Yog xav paub ntxiv mus xyuas: millerwelds.com/resources/welding-guides/stick-welding-guide/stick-welding-tips.
Hydrogen roj yog ib qho kev phom sij loj heev, ua rau vuam qeeb, HAZ tawg uas tshwm sim ntau teev lossis hnub tom qab vuam tiav, lossis ob qho tib si.
Txawm li cas los xij, qhov kev hem thawj hydrogen feem ntau yog yooj yim tshem tawm los ntawm kev ntxuav cov hlau kom huv. Tshem tawm cov roj, xeb, xim thiab txhua yam dej noo vim lawv yog qhov chaw ntawm hydrogen.
Txawm li cas los xij, hydrogen tseem yog ib qho kev hem thawj thaum welding high-strength steel (nce siv nyob rau hauv cov khoom siv ua liaj ua teb niaj hnub), tuab hlau profiles, thiab nyob rau hauv cov vuam txwv heev. Thaum kho cov ntaub ntawv no, nco ntsoov siv lub tshuab hluav taws xob tsawg tsawg thiab preheat qhov chaw vuam.
Jody Collier taw qhia tias cov qhov spongy lossis me me npuas npuas tshwm rau ntawm qhov chaw ntawm lub vuam yog ib qho kev qhia tseeb tias koj qhov vuam muaj qhov porosity, uas nws suav tias yog qhov teeb meem thib ib nrog vuam.
Weld porosity tuaj yeem siv tau ntau yam, suav nrog cov pores saum npoo, wormholes, craters, thiab kab noj hniav, pom (ntawm qhov chaw) thiab pom tsis pom (qhov tob hauv qhov vuam).
Collier kuj qhia tias, "Cia lub pas dej nyob twj ywm molten ntev dua, cia cov roj npau npau tawm ntawm qhov vuam ua ntej nws khov."
Thaum cov hlau kab uas muaj ntau tshaj plaws yog 0.035 thiab 0.045 ntiv tes, ib txoj kab uas hla me me ua rau nws yooj yim dua los tsim cov vuam zoo. Carl Huss ntawm Lincoln Electric pom zoo kom siv 0.025 "xaim, tshwj xeeb tshaj yog thaum vuam cov ntaub ntawv nyias 1/8" lossis tsawg dua.
Nws piav qhia tias feem ntau cov welds nyiam ua welds uas loj dhau, uas tuaj yeem ua rau kub hnyiab. Me me txoj kab uas hla muab ib tug ruaj khov weld ntawm qis tam sim no ua rau nws tsis tshua muaj kev kub hnyiab los ntawm.
Ceev faj thaum siv txoj kev no ntawm cov ntaub ntawv tuab (3⁄16 ″ thiab thicker), vim 0.025 ″ txoj kab uas hla xaim yuav ua rau tsis txaus.
Ib zaug tsuas yog npau suav tuaj tseeb rau cov neeg ua liaj ua teb tab tom nrhiav txoj hauv kev zoo dua rau vuam nyias hlau, txhuas thiab stainless hlau, TIG vuam tau dhau los ua ntau dua hauv cov khw ua liaj ua teb ua tsaug rau qhov muaj koob meej ntawm ntau tus txheej txheem vuam.
Txawm li cas los xij, raws li kev paub ntawm tus kheej, kev kawm TIG vuam tsis yooj yim li kev kawm MIG vuam.
TIG yuav tsum tau ob txhais tes (ib qho los tuav cov cua kub hauv lub hnub kub-kub tungsten electrode, lwm qhov los pub cov pas nrig rau hauv arc) thiab ib ko taw (kom khiav cov ko taw pedal lossis tam sim no regulator mounted ntawm lub teeb) Peb-txoj kev sib koom tes yog siv los pib, kho thiab nres tam sim no ntws).
Txhawm rau zam cov txiaj ntsig zoo li kuv, cov neeg pib tshiab thiab cov uas xav ua kom lawv cov kev txawj ntse tuaj yeem ua kom zoo dua ntawm cov TIG vuam cov lus qhia, nyob rau hauv cov lus ntawm Miller Electric tus kws pab tswv yim Ron Covell, Cov Lus Qhia Vuam: Cov Lus Qhia rau TIG Vuam Zoo.
Yav tom ntej: ncua yam tsawg kawg 10 feeb. Cov ntaub ntawv yog muab "raws li yog" rau cov ntaub ntawv xov xwm nkaus xwb thiab tsis yog rau kev lag luam lossis cov lus pom zoo. Txhawm rau saib txhua qhov kev sib pauv qeeb thiab cov ntsiab lus ntawm kev siv, saib https://www.barchart.com/solutions/terms.