Lub tswv yim thiab kev faib tawm ntawm cov roj hlau arc vuam
Lub arc vuam txoj kev uas siv ib tug molten electrode, sab nraud roj raws li lub arc nruab nrab, thiab tiv thaiv cov hlau tee, welding pas dej ua ke thiab high-temperature hlau nyob rau hauv lub vuam cheeb tsam yog hu ua molten electrode gas shielded arc vuam.
Raws li kev faib tawm ntawm vuam hlau, nws tuaj yeem muab faib ua cov tub ntxhais hlau vuam thiab flux cored hlau vuam. Cov roj inert (Ar los yog Nws) shielded arc vuam txoj kev siv cov tub ntxhais hlau yog hu ua Melting Inert Gas Arc Vuam (MIG Vuam); argon-nplua nuj sib xyaw roj shielded arc vuam txoj kev siv cov khoom siv hlau yog hu ua Hlau Inert Gas Arc Vuam (MIG welding). MAG welding (Metal Active Gas Arc Vuam). CO2 roj shielded vuam siv cov khoom hlau, hu ua CO2 vuam. Thaum siv flux-cored hlau, arc vuam uas tuaj yeem siv CO2 lossis CO2 + Ar sib xyaw roj raws li cov roj tiv thaiv hu ua flux-cored wire gas shielded welding. Nws tseem tuaj yeem ua qhov no yam tsis tau ntxiv cov roj thaiv kev tiv thaiv. Txoj kev no yog hu ua self-shielded arc vuam.
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Qhov sib txawv ntawm qhov sib txawv ntawm MIG / MAG vuam thiab CO2 vuam
Cov yam ntxwv ntawm CO2 vuam yog: tus nqi qis thiab kev ua haujlwm siab. Txawm li cas los xij, nws muaj qhov tsis zoo ntawm qhov loj ntawm spatter thiab tsis zoo molding, yog li qee qhov txheej txheem vuam siv MIG / MAG vuam zoo tib yam. Ordinary MIG/MAG welding yog ib txoj kev vuam arc tiv thaiv los ntawm cov roj inert lossis argon-nplua nuj roj, tab sis CO2 vuam muaj zog oxidizing zog, uas txiav txim qhov txawv thiab cov yam ntxwv ntawm ob. Piv nrog CO2 vuam, qhov zoo ntawm MIG / MAG vuam yog raws li nram no:
1) Tus nqi txaws yog txo los ntawm ntau tshaj 50%. Lub vuam arc nyob rau hauv kev tiv thaiv ntawm argon los yog argon-nplua nuj roj yog ruaj khov. Tsis tsuas yog lub arc ruaj khov thaum lub sij hawm hloov pauv hloov pauv thiab dav hlau hloov pauv, tab sis kuj tseem nyob rau hauv qhov kev hloov pauv luv luv ntawm qhov tam sim no MAG vuam, lub arc muaj qhov cuam tshuam me me ntawm cov tee dej, yog li ua kom ntseeg tau tias MIG / Tus nqi ntawm spatter los ntawm MAG welding luv Circuit Court hloov yog txo los ntawm ntau tshaj 50%.
2) Lub vuam seam yog sib npaug thiab zoo nkauj. Txij li thaum kev hloov ntawm MIG / MAG welding droplets yog uniform, hloov maj mam, thiab ruaj khov, lub vuam yog tsim uniformly thiab zoo nkauj.
3) tuaj yeem vuam ntau cov hlau nquag thiab lawv cov alloys. Cov cuab yeej oxidizing ntawm arc cua yog qhov tsis muaj zog lossis txawm tias tsis muaj oxidizing. MIG / MAG welding tsis tuaj yeem tsuas yog vuam carbon steel thiab siab alloy hlau, tab sis kuj muaj ntau yam hlau thiab lawv cov alloys, xws li: txhuas thiab txhuas alloys, stainless hlau thiab nws cov alloys, Magnesium thiab magnesium alloys, thiab lwm yam.
4) Zoo heev txhim kho cov txheej txheem vuam, vuam zoo thiab kev ua haujlwm ntau lawm.
Qhov txawv ntawm pulse MIG / MAG vuam thiab zoo tib yam MIG / MAG vuam
Cov ntaub ntawv hloov pauv tseem ceeb ntawm MIG / MAG vuam zoo tib yam yog dav hlau hloov mus rau qhov siab tam sim no thiab luv luv-circuit hloov ntawm qhov tam sim no. Yog li ntawd, tsis tshua muaj tam sim no tseem muaj qhov tsis zoo ntawm qhov loj ntawm spatter thiab tsis zoo shaping, tshwj xeeb tshaj yog qee cov hlau tsis tuaj yeem welded nyob rau hauv qis tam sim no. Vuam xws li txhuas thiab alloys, stainless hlau, thiab lwm yam. Yog li ntawd, pulsed MIG/MAG vuam tshwm sim. Nws tus cwj pwm hloov pauv hloov pauv yog tias txhua tus mem tes tam sim no hloov ib lub tee dej. Nyob rau hauv qhov tseeb, nws yog ib tug droplet hloov. Piv nrog rau qhov zoo tib yam MIG / MAG vuam, nws cov yam ntxwv tseem ceeb yog raws li nram no:
1) Daim ntawv zoo tshaj plaws ntawm kev hloov pauv rau mem tes MIG / MAG vuam yog hloov ib lub tee rau ib lub mem tes. Nyob rau hauv txoj kev no, los ntawm kev kho cov mem tes zaus, tus naj npawb ntawm cov tee hloov ib lub sij hawm tuaj yeem hloov pauv, uas yog qhov ceev ntawm cov welding ceev.
2) Vim tias lub xaim xaim ntawm ib lub mem tes thiab ib qho poob, txoj kab uas hla ntawm cov tee dej yog kwv yees sib npaug ntawm txoj kab uas hla ntawm lub vuam hlau, yog li lub arc cua sov ntawm cov tee dej qis dua, uas yog, qhov kub ntawm cov tee dej yog tsawg. (piv rau kev hloov dav hlau thiab kev hloov pauv loj loj). Yog li ntawd, lub melting coefficient ntawm vuam hlau yog nce, uas txhais tau hais tias lub melting efficiency ntawm vuam hlau yog zoo dua.
3) Vim tias qhov ntsuas kub qis qis, muaj cov pa luam yeeb tsawg dua. Qhov no ntawm ib sab yuav txo tau qhov kub ntawm cov ntsiab lus alloy thiab ntawm qhov tod tes txhim kho qhov chaw tsim kho.
Piv nrog rau qhov zoo tib yam MIG / MAG vuam, nws lub ntsiab zoo yog raws li nram no:
1) Vuam spatter yog me me los yog tsis muaj spatter.
2) Lub arc muaj kev ncaj ncees zoo thiab tsim nyog rau kev vuam hauv txhua txoj haujlwm.
3) Lub weld yog tsim tau zoo, lub melting dav yog loj, tus ntiv tes zoo li nkag mus rau cov yam ntxwv tsis muaj zog, thiab residual qhov siab yog me me.
4) Cov tam sim no me me tuaj yeem ua tau zoo kawg nkaus welded hlau (xws li txhuas thiab nws cov alloys, thiab lwm yam).
Kev nthuav dav tam sim no ntawm MIG / MAG vuam dav hlau hloov mus. Thaum lub sij hawm pulse welding, cov vuam tam sim no tuaj yeem ua tiav qhov hloov pauv hloov pauv ntawm qhov ze ntawm qhov tseem ceeb ntawm lub dav hlau hloov mus rau qhov loj dua tam sim no ntawm kaum tawm amps.
Los ntawm cov saum toj no, peb tuaj yeem paub cov yam ntxwv thiab qhov zoo ntawm pulse MIG / MAG, tab sis tsis muaj dab tsi tuaj yeem ua tau zoo. Piv nrog rau MIG / MAG zoo tib yam, nws qhov tsis txaus yog raws li hauv qab no:
1) Welding efficiency yog ib txwm xav tias yuav qis me ntsis.
2) Cov kev xav tau zoo rau cov welders yog qhov siab.
3) Tam sim no, tus nqi ntawm cov khoom siv vuam yog qhov siab.
Cov txheej txheem tseem ceeb ntawm kev txiav txim siab rau kev xaiv cov mem tes MIG / MAG vuam
Raws li cov txiaj ntsig ntawm kev sib piv saum toj no, txawm hais tias mem tes MIG / MAG welding muaj ntau yam zoo uas tsis tuaj yeem ua tiav thiab muab piv nrog rau lwm txoj kev vuam, nws kuj muaj teeb meem ntawm cov khoom siv siab, me ntsis kev ua haujlwm tsawg, thiab nyuaj rau cov welding tswv. Yog li, kev xaiv cov mem tes MIG / MAG vuam yog txiav txim siab los ntawm cov txheej txheem vuam uas yuav tsum tau ua. Raws li cov txheej txheem vuam hauv tsev tam sim no, cov vuam hauv qab no yuav tsum pib siv mem tes MIG / MAG vuam.
1) carbon hlau. Lub sijhawm nrog cov kev xav tau siab ntawm cov khoom siv vuam zoo thiab cov tsos mob feem ntau yog nyob rau hauv kev lag luam ntawm cov hlab ntsha siab, xws li boilers, chemical heat exchangers, central air-conditioning heat exchangers, and turbine casings in the hydropower industry.
2) Stainless hlau. Siv cov tam sim no me me (qis dua 200A yog hu ua me me tam sim no, tib yam hauv qab no) thiab lub sijhawm uas yuav tsum muaj siab ntawm cov khoom siv vuam zoo thiab cov tsos, xws li locomotives thiab siab hlab ntsha hauv kev lag luam tshuaj.
3) Aluminium thiab nws cov alloys. Siv cov tam sim no me me (qis dua 200A yog hu ua me me tam sim no, tib yam hauv qab no) thiab lub sijhawm muaj kev xav tau siab ntawm weld zoo thiab tsos, xws li cov tsheb ciav hlau ceev, high-voltage switches, cua sib cais thiab lwm yam lag luam. Tshwj xeeb tshaj yog cov tsheb ciav hlau ceev, suav nrog CSR Group Sifang Rolling Stock Co., Ltd., Tangshan Rolling Stock Factory, Changchun Railway Tsheb, thiab lwm yam, nrog rau cov tuam txhab me me uas ua haujlwm rau lawv. Raws li kev lag luam cov peev txheej, los ntawm 2015 tag nrho cov nroog cov nroog thiab cov nroog nrog cov pej xeem ntau dua 500,000 hauv Suav teb yuav muaj tsheb ciav hlau. Qhov no qhia tau hais tias qhov kev xav tau loj heev rau cov tsheb ciav hlau, nrog rau qhov kev thov rau cov khoom siv vuam thiab cov khoom siv vuam.
4) tooj liab thiab nws cov alloys. Raws li kev nkag siab tam sim no, tooj liab thiab nws cov alloys yeej siv pulse MIG / MAG vuam (nyob rau hauv lub scope ntawm molten arc arc vuam).
Post lub sij hawm: Oct-23-2023
