Kev xaiv cov roj tiv thaiv tsis raug yuav ua rau koj muaj cov vuam uas muaj porosity, spatter, lossis lub zog tsis muaj zog - txawm tias thaum koj siv cov hlau MIG zoo meej thiab cov khoom siv. Cov roj vuam MIG yuav zoo li tsis pom tseeb, tab sis nws yog "tus qauv tseem ceeb uas tsis pom" uas cuam tshuam ncaj qha rau cov yam ntxwv arc, cov txheej txheem hloov hlau, thiab cov khoom siv kho tshuab kawg ntawm qhov vuam. Hauv qab no, peb yuav rhuav tshem cov qauv kev txiav txim siab yooj yim los pab koj xaiv cov roj tiv thaiv zoo rau koj daim ntawv thov.
Lub Txheej Txheem Kev Txiav Txim Siab: Nrhiav Koj Cov Roj Tiv Thaiv Zoo Tshaj Plaws
Peb yuav teb peb lo lus nug tseem ceeb kom koj xaiv tau raws li koj xav tau. Tsis tas yuav kwv yees ntxiv lawm—tsuas yog xaiv raws li koj xav tau tiag tiag xwb.
Lo lus nug 1: Koj vuam cov khoom siv dab tsi?
Cov khoom siv yog thawj qhov tseem ceeb tshaj plaws. Cia peb pib nrog cov feem ntau thiab txav mus rau cov hlau tshwj xeeb.
Hlau Me (Qhov Xwm Txheej Feem Ntau)
Rau cov roj siv rau vuam hlau tsis muaj zog nrog cov hlau MIG khov kho, muaj ob txoj kev xaiv uas yeej kev ua lag luam. Nov yog lawv cov yam ntxwv:
C25 Gas (75% Ar, 25% CO2) - Qhov Kev Xaiv Thawj Zaug Rau Txhua Tus
Vim li cas nws thiaj ua haujlwm: Cov argon CO2 sib tov no muab qhov arc ruaj khov, qhov vuam spatter tsawg kawg nkaus, thiab qhov zoo li vuam du - daws qhov kev ntxhov siab loj tshaj plaws ntawm kev vuam hlau me me. Nws txo cov khoom sib xyaw ua ke poob, ua rau lub zog tensile ntawm vuam, thiab ua haujlwm rau feem ntau daim ntawv thov, los ntawm cov ntawv nyias mus rau cov phaj nruab nrab-tuab. Txawm hais tias koj ua qhov luv luv lossis txau hloov pauv, C25 ua kom cov txheej txheem huv thiab tswj tau.C25
Qhov zoo tshaj plaws rau: Feem ntau cov haujlwm hlau tsis muaj zog uas qhov zoo, tsos, thiab yooj yim ua haujlwm tseem ceeb.
CO2 Ntshiab - Kev Sib pauv txuag nqi
Vim li cas nws thiaj siv: CO2 ntshiab pheej yig dua li cov pa roj sib xyaw, ua rau nws nyiam rau cov haujlwm ntim ntau ntawm cov peev nyiaj tsawg. Nws kuj muab kev nkag mus tob dua, uas yog qhov muaj txiaj ntsig zoo rau kev vuam phaj tuab yam tsis muaj beveling. Kev pauv pauv: Xav tias yuav muaj "arc" "nyuaj dua", ntau qhov vuam spatter, thiab qhov chaw vuam rougher. Koj yuav siv sijhawm ntxiv rau kev ntxuav tom qab vuam, thiab kev poob alloy siab dua piv rau C25.
Zoo tshaj plaws rau: Cov hlau tuab thiab mos uas tsis pom tseeb thiab tus nqi yog qhov tseem ceeb tshaj plaws.
Lub tswv yim zoo: Yog tias koj feem ntau vuam cov hlau tsis hnyav thiab xav tau cov txheej txheem huv si, tsis muaj teeb meem, pib nrog C25. Nws yog qhov kev xaiv ntau yam rau cov ntawv thov hlau MIG khov kho.
Hlau tsis xeb
Cov roj vuam hlau tsis xeb yuav tsum tswj tau qhov corrosion thiab xyuas kom meej tias qhov vuam zoo. Argon ntshiab yuav tsis ua haujlwm ntawm no - nws ua rau qhov vuam ntub thiab tsis zoo.成形Xaiv cov roj sib xyaw ua ke xws li Ar + 2-5% CO2 + 1-2% O2 lossis Ar + 90% He + 2.5% CO2. Cov roj sib xyaw no ua rau cov hlau yaj qis dua, txhim kho qhov sib kis ntawm cov hlau vuam, thiab txo qhov poob ntawm cov hlau sib xyaw, ua kom cov hlau tsis xeb zoo li qub.
Aluminium
Aluminium xav tau argon ntshiab los yog argon-helium sib xyaw. Argon txoj haujlwm tseem ceeb yog ntxuav cov zaj duab xis aluminium oxide (yuav tsum muaj rau cov vuam muaj zog) thiab ua kom lub arc ruaj khov. Kev ntxiv helium ua rau muaj cua sov ntau ntxiv, uas pab nrog cov seem aluminium tuab dua los ntawm kev nce qhov nkag thiab qhov ceev ntawm kev vuam. Tsis txhob muaj CO2 lossis O2 hauv cov roj tiv thaiv txhuas - lawv yuav ua rau muaj porosity thiab brittle welds.
Lo lus nug 2: Koj xav tau cov khoom siv vuam twg ua ntej?
Koj qhov kev xaiv roj cuam tshuam ncaj qha rau koj qhov kev vuam zoo li cas thiab ua haujlwm li cas. Sib phim cov roj rau koj cov khoom tseem ceeb:
- Xav tau cov hlaws weld dav dua thiab qhov nkag mus tob dua (zoo rau cov ntawv nyias nyias)? Mus nrog qhov sib piv argon siab dua - nws ua rau lub arc mos thiab tiv thaiv kev hlawv.
- Xav tau qhov tob rau cov phaj tuab? CO2 ntshiab lossis cov CO2 sib xyaw siab dua yuav muab cua sov ntau dua.
- Xav tau qhov vuam ceev dua? Cov khoom sib xyaw Argon-helium lossis C25 tso cai rau amperage siab dua yam tsis muaj spatter ntau dhau, ua rau muaj kev tsim khoom ntau dua.
- Ntxub kev ntxuav tom qab vuam? C25 lossis lwm yam khoom sib xyaw uas muaj argon ntau yuav txo tau cov dej vuam tawg ntau heev, txuag koj lub sijhawm ntawm kev sib tsoo thiab ua kom tiav.
Lo lus nug 3: Koj cov peev nyiaj yog dab tsi?
Cia peb ua tiag tiag - kev siv nyiaj txiag yog lub hauv paus rau ntau qhov kev txiav txim siab. Nov yog qhov kev faib tawm tiag tiag ntawm tus nqi, tsis yog tsuas yog tus nqi roj xwb:
- CO2 Ntshiab: Tus nqi roj qis tshaj plaws, tab sis tus nqi mus sij hawm ntev dua los ntawm lub sijhawm ntxuav ntxiv thiab cov khib nyiab hlau MIG ntau ntxiv.
- C25 Roj Av: Tus nqi roj av kim dua li CO2 ntshiab, tab sis tus nqi tag nrho qis dua ua tsaug rau qhov vuam ceev dua thiab ua haujlwm dua tsawg dua. Tsis tas yuav muaj cov khoom siv ntxiv - tsuas yog ib lub tog raj kheej sib tov xwb.
- Tri-mix lossis argon-helium sib tov: Tus nqi siab dua rau cov ntaub ntawv tshwj xeeb, tab sis tsim nyog kom tsis txhob muaj kev puas tsuaj kim heev.
Nov yog qhov teeb meem: Yog tias koj tsis muaj nyiaj ntau tab sis vuam cov hlau me me, CO2 ntshiab yog qhov ua tau - tsuas yog suav nrog lub sijhawm ntxuav xwb. Rau feem ntau lub khw, C25 muab qhov sib npaug zoo tshaj plaws ntawm tus nqi thiab kev ua tau zoo.
Cov Lus Qhia Tseem Ceeb: Tsis Txhob Ua Rau Kev Xaiv Roj Zoo Yog Tias Tsis Zoo
Txawm tias cov roj tiv thaiv zoo los yuav tsis cawm koj qhov vuam yog tias koj ua rau cov roj ntws qeeb lossis cov roj qhuav. Cov ntsiab lus no tsis tuaj yeem sib tham tau:
Tus Nqi Roj Ntws (CFH/LPM)
Yog tias cov dej ntws tsawg dhau ua rau koj cov hlau vuam tsis muaj kev tiv thaiv (ua rau cov hlau vuam porosity); yog tias ntau dhau ua rau muaj kev kub ntxhov (nqus cua, ua rau muaj porosity). Rau feem ntau cov hlau MIG khov kho:
- Hlau me me (C25 lossis CO2 ntshiab): 15-25 LPM (30-50 CFH)
- Hlau tsis xeb (tri-mix): 18-28 LPM (38-60 CFH)
- Txhuas (argon/argon-helium): 20-30 LPM (42-63 CFH)
Kev Qhuav Roj
Cov dej noo hauv cov roj tiv thaiv yog ib yam uas tua tau ntsiag to. Nws ua rau cov qhov vuam thiab ua rau cov vuam tsis muaj zog. Ib txwm siv lub tshuab ziab/lim hauv koj cov kav roj, thiab xyuas kom koj cov thoob roj siab tshaj 0.5 MPa (70 psi)—hauv qab qhov siab no, cov dej noo thiab cov khoom tsis huv yuav sib sau ua ke hauv cov roj.
Txoj Cai Kawg & Kauj Ruam Tom Ntej
Txoj cai tseem ceeb: Sib phim koj cov roj tiv thaiv rau koj cov khoom siv, sib npaug qhov zoo thiab tus nqi, thiab ib txwm xyuas kom huv si thiab xa roj txaus. Ua qhov no kom raug, thiab koj cov khoom khov khoMIG hlauyuav ua tau zoo tshaj plaws.
Thaum koj tau xaiv cov roj tiv thaiv zoo lawm, kev xaiv cov hlau MIG zoo uas phim cov roj thiab koj cov khoom siv yog kauj ruam tom ntej rau kev vuam kom zoo. Cov hlau MIG zoo ua kom muaj cov tshuaj lom neeg ruaj khov thiab kev pub hlau du - ua haujlwm sib xws nrog koj cov roj tiv thaiv uas tau xaiv zoo kom xa cov vuam sib xws, muaj zog txhua lub sijhawm.
Lub sijhawm tshaj tawm: Lub Ib Hlis-03-2026