Cov teeb meem thiab cov kev daws teeb meem ntsig txog kev vuam txheej txheem ntawm cov phaj tuab thiab nyias
1. Yuav ua li cas yog tias lub thickness ntawm cov hlau workpiece tshaj qhov siab tshaj plaws vuam tam sim no uas lub vuam tshuab tuaj yeem ua tiav thaum siv roj hlau arc vuam (GMAW) thiab flux cored hlau gas arc vuam (FCAW) rau vuam steel workpieces?
Cov tshuaj yog preheat cov hlau ua ntej welding. Preheat qhov chaw vuam ntawm lub workpiece siv propane, standard gas los yog acetylene welding torch, nrog ib tug preheating kub ntawm 150-260 ℃, thiab ces pib nrog vuam. Lub hom phiaj ntawm preheating cov hlau nyob rau hauv lub vuam cheeb tsam yog los tiv thaiv lub weld cheeb tsam ntawm txias sai heev, thiaj li tsis mus ua kom tawg los yog tsis tiav fusion nyob rau hauv lub weld.
2. Yog hais tias nws yuav tsum tau siv melting electrode gas shielded welding los yog flux cored hlau gas shielded welding rau welding ib tug nyias hlau npog rau ib tug tuab steel yeeb nkab, yog hais tias lub vuam tam sim no tsis tuaj yeem kho kom raug thaum vuam, nws yuav ua rau ob qho xwm txheej:
Ib qho yog los txo cov vuam tam sim no kom tsis txhob muaj cov hlau nyias los ntawm kev kub hnyiab, thiab lub sijhawm no, cov hlau nyias tsis tuaj yeem welded rau cov yeeb nkab tuab; Qhov thib ob, cov vuam tam sim no ntau dhau tuaj yeem hlawv los ntawm cov kaus mom hlau nyias. Yuav tsum tau ua li cas?
Feem ntau muaj ob txoj kev daws teeb meem:
① Kho cov vuam tam sim no kom tsis txhob kub hnyiab los ntawm cov hlau nyias, preheat cov yeeb nkab tuab nrog lub vuam sib txuas, thiab tom qab ntawd siv cov phaj nyias nyias vuam tshuab los vuam ob lub qauv hlau.
② Kho cov vuam tam sim no kom haum rau vuam tuab steel kav. Thaum vuam, tuav lub sij hawm nyob ntawm qhov vuam arc ntawm cov yeeb nkab steel tuab ntawm 90% thiab txo lub sij hawm nyob ntawm cov hlau nyias. Nws yuav tsum tau muab sau tseg tias tsuas yog thaum muaj kev txawj ntse hauv cov txheej txheem no tuaj yeem tau txais cov pob qij txha zoo.
- Thaum welding ib tug nyias-walled ncig los yog rectangular nyias-walled yeeb nkab mus rau ib tug tuab phaj, lub vuam pas nrig yog nquag mus hlawv los ntawm nyias-walled yeeb nkab ib feem. Sib nrug los ntawm ob txoj kev daws teeb meem saum toj no, puas muaj lwm yam kev daws teeb meem?
Yog lawm, feem ntau yog siv lub tshav kub dissipation pas nrig thaum lub sij hawm vuam txheej txheem. Yog hais tias ib lub pas nrig puag ncig yog muab tso rau hauv ib lub raj nyias-walled, los yog cov khoom sib dhos tau muab tso rau hauv cov yeeb nkab sib dhos, cov pas nrig khoom yuav tshem tawm cov cua sov ntawm cov phab ntsa nyias thiab tiv thaiv kev kub nyhiab. Feem ntau hais lus, cov khoom puag ncig lossis cov pas nrig yog nruj nreem ntsia rau hauv feem ntau ntawm cov khoom siv hollow los yog lub raj raj. Thaum welding, yuav tsum tau saib xyuas kom lub vuam tawm ntawm qhov kawg ntawm cov yeeb nkab, uas yog qhov yooj yim tshaj plaws los hlawv. Daim duab schematic ntawm kev siv lub dab da dej ua kom sov kom tsis txhob kub hnyiab tau pom hauv daim duab 1.
- Yuav ua li cas galvanized lossis chromium uas muaj cov ntaub ntawv yuav tsum tau welded rau lwm qhov?
Txoj kev zoo tshaj plaws yog ua ntaub ntawv los yog polish qhov chaw nyob ib ncig ntawm lub vuam ua ntej vuam, raws li galvanized los yog chromium uas muaj hlau daim hlau tsis tsuas yog paug thiab tsis muaj zog ntawm weld, tab sis kuj tso cov pa phem thaum lub sij hawm vuam.