Lub tswv yim thiab kev faib tawm ntawm MIG arc vuam
Lub arc vuam txoj kev siv molten electrode, nrog rau sab nraud roj raws li qhov nruab nrab ntawm arc, thiab tiv thaiv cov hlau tee, vuam lub pas dej molten thiab cov hlau kub kub hauv qhov chaw vuam yog hu ua MIG arc vuam. Raws li qhov sib txawv ntawm cov khoom siv vuam hlau thiab cov khoom siv tiv thaiv, nws tuaj yeem muab faib ua cov hauv qab no, raws li qhia hauv daim duab.
Raws li kev faib tawm ntawm vuam hlau tuaj yeem muab faib ua cov khoom siv hlau vuam thiab flux-cored hlau vuam. Inert Gas (Ar lossis Nws) Arc Vuam nrog cov tub ntxhais hlau xaim yog hu ua MIG arc vuam (Metal Inert Gas Arc Vuam); Argon nplua nuj Gas Arc Vuam nrog cov khoom cored hlau, hu ua MAG (Metal Active Gas Arc Vuam). CO2 roj welding nrog cov khoom cored hlau yog hu ua CO2 vuam. Nyob rau hauv cov ntaub ntawv ntawm flux-cored hlau, lub arc vuam uas siv tau CO2 los yog CO2+Ar sib tov raws li cov shielding gas hu ua flux-cored hlau gas shielding vuam. Nws tuaj yeem ua tau yam tsis muaj kev tiv thaiv roj, uas yog hu ua self-protective arc vuam.
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, muaj qhov tsis txaus ntawm cov txaws loj thiab ua tsis zoo, 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 oxidation, uas txiav txim siab qhov sib txawv thiab cov yam ntxwv ntawm ob. Lub ntsiab zoo ntawm MIG / MAG vuam piv rau CO2 vuam yog raws li nram no:
1) Tus nqi ntawm spatter yog txo los ntawm ntau tshaj 50%. Lub vuam arc nyob rau hauv kev tiv thaiv ntawm argon los yog argon nplua nuj roj lub cev yog ruaj khov, tsis tsuas yog lub arc yog ruaj khov nyob rau hauv lub tee hloov thiab lub dav hlau hloov, tab sis kuj lub arc muaj tsawg repulsive nyhuv ntawm cov tee nyob rau hauv lub luv luv Circuit Court hloov ntawm lub me me. Tam sim no MAG vuam, yog li ua kom ntseeg tau tias cov nyiaj txaws ntawm kev hloov pauv luv luv ntawm MIG / MAG vuam yog txo los ntawm ntau dua 50%.
2) Lub vuam tsim yog sib xws thiab zoo nkauj. Vim hais tias MIG / MAG welding droplet hloov pauv yog qhov sib xws, zoo, ruaj khov, yog li cov vuam tsim zoo ib yam thiab zoo nkauj.
3) tuaj yeem vuam ntau cov hlau nquag thiab lawv cov alloys. Cov oxidation ntawm lub arc cua tsis muaj zog, txawm tias tsis muaj oxidation, MIG / MAG vuam tsis tau tsuas yog weld carbon steel, siab alloy hlau, tab sis kuj muaj peev xwm welding ntau active hlau thiab lawv alloys, xws li: txhuas thiab txhuas alloys, stainless hlau. thiab nws cov alloys, magnesium thiab magnesium alloys.
4) Zoo heev txhim kho cov txheej txheem vuam, vuam zoo thiab kev ua haujlwm ntau lawm.
Qhov sib txawv ntawm pulsed MIG / MAG vuam thiab zoo tib yam MIG / MAG vuam
Daim ntawv hloov pauv tseem ceeb ntawm MIG / MAG vuam zoo tib yam yog kev hloov dav hlau ntawm qhov siab tam sim no thiab kev hloov pauv luv luv ntawm qhov tam sim no, yog li tam sim no me me tseem muaj qhov tsis zoo ntawm cov txaws loj thiab tsis zoo, tshwj xeeb tshaj yog qee cov hlau tsis tuaj yeem welded. ntawm qhov tsis tshua muaj tam sim no, xws li aluminium thiab alloys, stainless hlau thiab lwm yam. Yog li ntawd, pulsed MIG / MAG welding yog tsim, thiab nws txoj kev hloov pauv hloov pauv yog tus cwj pwm los ntawm kev hloov pauv rau txhua tus mem tes tam sim no, uas belongs rau kev hloov pauv hauv cov ntsiab lus. Piv nrog rau qhov zoo tib yam MIG / MAG vuam, nws cov yam ntxwv tseem ceeb yog raws li nram no:
1) Daim ntawv hloov pauv zoo tshaj plaws ntawm kev hloov pauv MIG / MAG vuam yog ib qho kev hloov pauv mus rau ib lub tee dej. Nyob rau hauv txoj kev no, los ntawm kev kho cov mem tes zaus, tus naj npawb ntawm cov tee nyob rau hauv lub yaj poob hloov ib lub sij hawm yuav hloov, uas yog, lub melting ceev ntawm lub vuam hlau.
2) Vim tias qhov poob ntawm qhov kev hloov pauv ntawm cov tee dej, lub tee txoj kab uas hla yog roughly sib npaug ntawm txoj kab uas hla ntawm lub vuam hlau, ces cov tee arc cua sov yog tsawg, uas yog, lub tee dej kub yog tsawg (piv nrog lub dav hlau hloov. thiab kev hloov pauv loj loj). Yog li ntawd, lub melting coefficient ntawm vuam hlau yog zoo dua, uas yog, lub melting efficiency ntawm vuam hlau yog zoo dua.
3) Vim tias qhov poob qis, cov pa luam yeeb vuam tsawg dua. Nyob rau hauv txoj kev no, qhov hluav taws kub poob ntawm alloying ntsiab yog txo ntawm ib sab, thiab kev tsim kho ib puag ncig zoo dua ntawm qhov tod tes.
Piv nrog rau qhov zoo tib yam MIG / MAG vuam nws lub ntsiab zoo yog raws li nram no:
1) Vuam txaws me me, lossis txawm tsis muaj txaws.
2) Zoo arc ncaj qha, haum rau txhua txoj haujlwm vuam.
3) Lub vuam yog tsim tau zoo, lub melting dav yog loj, tus ntiv tes zoo li melting qhov tob tus yam ntxwv tsis muaj zog, thiab qhov seem qhov siab yog me me.
4) Me me tam sim no zoo meej vuam ntawm cov hlau nquag (xws li txhuas thiab nws cov alloys).
Tam sim no ntau yam ntawm MIG / MAG vuam dav hlau hloov pauv tau nthuav dav. Nyob rau hauv lub tshuab nqus tsev vuam, cov vuam tam sim no tuaj yeem ruaj khov los ntawm qhov tseem ceeb tam sim no ntawm lub dav hlau hloov mus rau qhov loj dua tam sim no ntawm kaum tawm amperes.
Los ntawm cov saum toj no peb tuaj yeem pom cov yam ntxwv thiab qhov zoo ntawm cov mem tes MIG / MAG, tab sis tsis muaj dab tsi tuaj yeem ua tau zoo. Qhov tsis zoo piv nrog MIG / MAG zoo tib yam yog raws li hauv qab no:
1) Lub vuam ntau lawm efficiency ib txwm xav tias me ntsis qis.
2) Cov kev xav tau zoo tshaj plaws rau cov welders.
3) Tam sim no, tus nqi ntawm cov khoom siv vuam yog siab dua.
Kev xaiv ntawm pulsed MIG / MAG vuam yog txiav txim siab los ntawm cov txheej txheem
Raws li cov txiaj ntsig sib piv saum toj no, txawm hais tias kev sib tw MIG / MAG welding muaj ntau qhov zoo uas lwm cov vuam tsis tuaj yeem paub thiab muab piv, nws kuj muaj teeb meem xws li cov khoom siv siab, me ntsis kev ua haujlwm qis thiab nyuaj rau cov welders rau tus tswv. Yog li ntawd, kev xaiv ntawm pulsed MIG / MAG vuam yog tsuas yog txiav txim los ntawm cov txheej txheem vuam yuav tsum. Raws li cov txheej txheem vuam hauv tsev tam sim no, cov vuam hauv qab no yuav tsum pib siv lub tshuab MIG / MAG vuam.
1) carbon hlau. Lub sijhawm muaj kev xav tau siab rau 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 turboshells in the hydropower industry.
2) Stainless hlau. Kev siv cov tam sim no me me (200A hauv qab no yog hu ua me me tam sim no, tib yam hauv qab no) thiab cov khoom siv vuam zoo, cov kev xav tau zoo dua qub, xws li locomotives, tshuaj lom neeg kev lag luam siab hlab ntsha, thiab lwm yam.
3) Aluminium thiab nws cov alloys. Kev siv cov tam sim no me me (200A hauv qab no yog hu ua me me tam sim no, tib yam hauv qab no) thiab cov khoom siv vuam zoo, cov kev xav tau ntawm cov sijhawm siab dua, xws li cov tsheb loj, cov hloov hluav taws xob siab, cua sib cais thiab lwm yam lag luam. Tshwj xeeb, cov tsheb ceev, suav nrog CSR Group Sifang tsheb, Tangshan Tsheb Hoobkas thiab Changke thiab lwm cov tuam txhab me me rau lawv cov khoom lag luam. Raws li kev lag luam xov xwm, los ntawm 2015, tag nrho cov nroog cov nroog thiab cov nroog uas muaj cov pej xeem ntau dua 500, 000 tau paub txog cov tsheb ciav hlau mos txwv, uas qhia tau hais tias qhov kev thov loj rau cov mos txwv tsheb ciav hlau thiab qhov kev thov loj 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 yog qhov tseem ceeb ntawm MIG / MAG vuam (hauv thaj tsam ntawm MIG roj tiv thaiv vuam).
