Mig vuam roj, tseem hu ua cov ntaub thaiv cov roj, yog cov roj tshwj xeeb siv hauv cov roj weld Tsis zoo li flux - Core} Cov Khoom Siv Hluav Taws Xob (uas siv cov ntaub thaiv cov roj av los tsim cov kev thaiv ntawm Molten hlau thiab ib puag ncig huab cua. Cov roj no tsis tau noj nyob rau hauv cov txheej txheem vuam tab sis ua raws li qhov nruab nrab tiv thaiv, zoo ib yam nkaus rau kev ua tiav huv si, thiab kho tau dawb {}} Welds pub dawb.
Core Laj Txheej Txheem Ntawm Mig Vuam Roj
At its most basic level, MIG welding gas serves to isolate the molten weld pool from atmospheric gases (oxygen, nitrogen, and hydrogen) that would otherwise contaminate the weld. Thaum hlau tau melted thaum lub sij hawm vuam, nws dhau los ua cov pa roj av uas tsis muaj zog rau cov pa roj weld), Nitrogen ua rau porosity (tawg}} Mig vuam roj tsim cov roj av "pam vov" ncig cov pa hluav taws xob hauv Weld, thawb cov hluav taws xob huv rau cov hlau molten kom zoo.
Tshaj li kev tiv thaiv, Mig Vuam roj kuj tseem cuam tshuam Arc ruaj khov, weld hlaws duab, thiab kev nkag mus. Hom roj uas siv tau tuaj yeem ua kom haum rau cov hlau hauv paus (piv txwv li, txhuas) thiab cov qauv tuab rau cov neeg siv tshuaj.
Hom Mig Vuam Roj
Mig vuam roj yog feem ntau muaj ntawm cov roj inert (argon, helbage gases (carbon dioxide, ntau zaus), feem ntau yog sib npaug, arc kev ua haujlwm, thiab tus nqi. Cov hom feem ntau suav nrog:
1. Argon (AR)
Argon yog inert, tsis muaj xim, ocolless roj uas yog lub hauv paus ntawm feem ntau mig vuam gould sib xyaw. Nws muaj nuj nqis rau nws lub peev xwm los tsim lub ruaj khov, "muag" arc thiab ib qho kev nyab xeeb ntawm Weld hlaws dai. Cov yam ntxwv tseem ceeb:
Inert Xwm: tsis muaj dab tsi tshwm sim nrog Molten hlau, ua rau nws zoo tagnrho rau kev ua cov hlau zoo li txhuas, tooj liab, thiab hlau stainless.
Arc Stability: tsim lub meej mom ruaj khov nrog qhov tsawg kawg nkaus, txawm tias tsis tshua muaj hluav taws xob {}}}}}}}}}}
Bead koob: Txhawb kev dav dav, tiaj tus hlaws nrog kev nkag siab maj, zoo meej rau lub cev pom kev (piv txwv li lub tsheb zoo nkauj.
Ntshiab Agon feem ntau siv rau kev siv vuam aluminium, raws li nws tiv thaiv kev tsim ntawm txhuas oxide (ib txheej tawv uas tuaj yeem ntxiab impurities nyob hauv weld). Nws tseem siv los ua lub hauv paus rau kev sib xyaw nrog lwm cov roj (zoo li belium lossis helium) rau vuam hlau.
2. Cov pa roj carbon dioxide (CO₂)
Cov pa roj carbon dioxide yog cov pa hloov roj uas pheej yig dua Argon tab sis tsis tshua ruaj khov. Nws tsis tshua siv ib leeg hauv MIG VUAM (vim nws nyiam ua rau tau hais plaub) tab sis yog tus tseem ceeb ntawm kev sib xyaw rau cov hlau. Cov yam ntxwv tseem ceeb:
Kev nkag mus: Nce Arc Zog, ua rau muaj Weld mus rau hauv lub hauv paus hlau}}}}}} lossis ntau dua) qhov twg tag nrho cov lus tsis zoo yog qhov tseem ceeb.
Tus nqi - qhov ua tau zoo: ntau dua ntau dua Argon, ua nws ib qho nrov ntxiv rau kev sib xyaw hlau los txo cov nqi.
Kev muaj feem kis tau: tuaj yeem ua rau ntau dua li Arton, yog li nws feem ntau yog tov nrog kev sib tw ua rau nkag mus thiab ruaj khov.
Ib qho 100% pa roj ntsha yog qee zaum siv rau hnyav {{}}}}}}}}}}} kev lag luam steel vuam (piv txwv li tus nqi yog qhov ua tau zoo thiab sib luag yog tau.
3. Argon -} Cov pa roj carbon dioxide (ar - co₂) sib xyaw
Cov no yog qhov feem ntau cov mig vuam gases rau cov hlau me me thiab qis - allloy steel. Cov sib npaug sib xyaw argon lub qhov ruaj khov nrog kev nkag mus, muab cov versetility, muab cov versatility rau feem ntau steel tej yaam num. Cov kev sib piv xws li:
75% sib cav + 25}}}} Nws muab cov arc zoo, muaj qhov sib txawv me me, thiab tsawg heev- tsim nyog rau txhua yam ntawm nyias ntawv hlau rau ¼ {4 4} ncha hlau.
90% sib cav + 10} Nws yog qhov zoo tagnrho rau cov hlau stainless (khaws cia corrosion tsis kam) thiab pom steel welds qhov chaw zoo siab yog qhov tseem ceeb.
80% argon + 20}}}
Cov kev sib xyaw no muaj dav thiab tau tshaj tawm cov tshuaj ntsuab, ua rau lawv mus -} {} {}} Cov kws tshaj lij ua haujlwm nrog hlau.
4. Argon {{{{}} helium (ar - nws) sib xyaw
Helium yog cov roj hauv cov roj ntsha uas ua rau lub tsheb kub tshaj argon, ua cov kev sib xyaw no muaj txiaj ntsig zoo rau vuam tuab lossis cua sov {{}} tiv thaiv hlau. Cov yam ntxwv tseem ceeb:
Cov khoom cua kub siab dua: Helium nce zuj zus mus rau qhov kub thiab txias, ua rau nkag mus tob tob hauv tuab txhuas (½ nti lossis tooj liab (uas ua rau kub sai sai).
Bead Fosility: Pab Molten Hlau Flow Ntau smoothly, txo txoj kev pheej hmoo ntawm kev tsis xws luag nyob rau hauv loj.
Cov kev sib tw sib piv suav nrog 75% Argon + 25}}}}} -} {}} kev siv kub). Cov tshuaj sib xyaw no kim dua Aregon - co tab sis yog qhov tseem ceeb rau vuam tuab tsis} ferrous hlau.
Yuav ua li cas Mig vuam roj ua haujlwm hauv cov txheej txheem vuam
Mig vuam roj yog xa tawm los ntawm cov kev ntsuas lub tog raj kheej los ntawm cov kev tswj hwm (uas tswj hwm ntws tus nqi) thiab ib qho kev ntsuas ntws tawm hauv lub vuam phom. Raws li cov phom tau qhib kom tau, cov pa roj ntws los ntawm lub nozzle ntawm ib ncig ntawm cov xaim xaim, muab cov ntaub thaiv thaiv weld pas dej. Ntawm no yog li cas nws cuam tshuam nrog cov txheej txheem vuam:
Kev thaiv cov ntaub thaiv: Cov roj hloov cua los ntawm thaj chaw weld, thaiv cov pa, nitrogen, thiab noo noo. Qhov no txwv tsis pub cov neeg oxides, Nitrides, thiab porosity nyob rau hauv weld.
Arc stabilization: cov roj (tshwj xeeb yog argon) nyob ib puag ncig lub arc, txo kev kub ntxhov thiab ua kom lub arc lub zog tsom rau melting cov xaim xaim thiab cov hlau hlau. Qhov no ua kom ntseeg tau tias muaj cov lej tsawg, zoo li melt.
Hlau Flow Control: Cov pa roj cuam tshuam li cas cov hlau loj sib kis. Argon ua rau cov hlau ntws dav thiab smoother, thaum helium txhawb kom tob dua, kev nkag mus nqaim.
Cov pa roj ntws tsawg (ntsuas hauv cubic feet ib teev, CFH) yog qhov tseem ceeb: tsawg heev, thiab cov ntaub thaiv npog tsis muaj zog (tso cai paug); Ntau dhau, thiab roj yog nkim (thiab tej zaum yuav tsim kev kub siab uas cuam tshuam cov ntaub thaiv npog). Feem ntau cov haujlwm siv 20-30 CFH rau kev tiv thaiv zoo.
Yuav ua li cas MIG Welding roj sib txawv los ntawm lwm cov roj av
Mig vuam roj yog txawv ntawm gases siv hauv lwm cov txheej txheem:
Tige vuam roj: Tig tau Ntshiab Spranon (rau txhuas) lossis Argon {}}}} Hely}}} Hely}}} Helt} cons)), tsis yog cov tsav hlau ua kom muaj zog hauv lub arc).
Oxy - roj roj: oxy- acetylene (siv hauv kev txiav lossis tsheb roj hmab uas hlawv cov roj. Mig vuam roj tsis hlawv - nws tsuas yog cov thaiv.
Flux - Cov Tub Ntxhais "Roj": Flux-}}}}}}}}} Cov Qauv Ntawm Cov Glux Hluav Taws Kub, tsis yog pa roj sab nraud. Mig vuam roj yog cais, tswj nruab nrab.
Xaiv txoj cai Mig vuam roj
Kev xaiv ntawm Mig Vuam roj nyob ntawm ob qho tseem ceeb:
Puag hlau: Aluminium yuav tsum muaj Ntshiab Argon; Cov hlau me me ua haujlwm nrog Argon - kev sib xyaw; Stainless hlau xav tau qis - Kev sib xyaw ua ke los khaws cov corrosion tsis kam; tuab cov hlau yuav siv Argon - helium.
Cov Kev Xav Tau Nqis Tes Haujlwm: Pom tau Welds xav tau tsawg {{0 og, 90/10 argon - co₂); Cov hlau tuab xav tau ntau dua nkag (piv txwv li, 75/25); Tus nqi - Cov phiaj xwm rhiab yuav siv 100% kev sib koom.
Vuam cov khw muag khoom tuaj yeem pom zoo kom cov kev siv tau zoo, tab sis pib nrog 75% Kev sib xyaw rau cov phiaj xwm sib luag rau cov phiaj xwm hlau feem ntau.
Tag
Mig vuam roj yog cov kev tiv thaiv roj (lossis sib xyaw) uas tiv thaiv lub pas dej Weld, thiab tswj cov ADD zoo hauv MIG VUAM. Nws los nyob rau hauv ntau cov ntawv - Argon, CO₂, lossis sib xyaw zoo li argon {}}}}} txhua yam tshuaj xyuas rau cov hlau thiab cov phiaj xwm. Los ntawm kev tsim cov teeb meem tiv thaiv kev ua paug ntawm cov cua thiab cuam tshuam kev ua yeeb yam, Mig vuam roj kom paub meej tias cov roj av muaj zog, huv si, thiab xwm yeem.
Txawm hais tias koj yog vuam nyias cov ntawv txheeb lossis tuab txhuas daim hlau, xaiv txoj cai Mig volor lossis hlau pub ceev. Nws yog lub hauv paus uas tsis pom zoo uas ua rau MIG vuam ib qho ntawm cov txheej txheem txhim khu kev qha tshaj plaws thiab ntau yam rau kev koom nrog cov hlau.
