Kev siv cov khoom siv hluav taws xob tsis zoo lossis cov roj ntws tsis zoo tuaj yeem cuam tshuam cov vuam zoo, cov nqi, thiab cov khoom tsim tau zoo heev. Shielding gas tiv thaiv lub pas dej molten weld los ntawm kev sib kis sab nraud, yog li nws yog ib qho tseem ceeb los xaiv cov roj zoo rau txoj haujlwm.
Txhawm rau kom tau txais txiaj ntsig zoo tshaj plaws, nws yog ib qho tseem ceeb kom paub tias cov roj thiab cov roj sib xyaw ua ke zoo tshaj plaws rau qee yam khoom siv. Koj yuav tsum paub txog ob peb lub tswv yim uas tuaj yeem pab koj ua kom zoo dua cov roj hauv koj qhov kev ua haujlwm vuam, uas tuaj yeem txuag koj nyiaj.
Ntau qhov kev xaiv roj thaiv thaiv rau cov roj hlau arc vuam (GMAW) tuaj yeem ua tiav txoj haujlwm. Xaiv cov roj uas zoo tshaj plaws rau cov khoom siv hauv paus, hloov hom, thiab vuam tsis tuaj yeem pab koj tau txais txiaj ntsig zoo tshaj plaws ntawm kev nqis peev.
Xaiv cov roj uas zoo tshaj plaws rau cov khoom siv hauv paus, hloov hom, thiab vuam tsis tuaj yeem pab koj tau txais txiaj ntsig zoo tshaj plaws ntawm koj cov peev txheej.
Tsis zoo Shielding Gas Performance
Cov pa roj kom zoo thiab kev pab them nqi yog qhov tseem ceeb txij li lub sijhawm vuam arc raug ntaus. Feem ntau, cov teeb meem nrog cov roj ntws tau pom tam sim ntawd. Tej zaum koj yuav muaj teeb meem tsim lossis txhawb nqa ib qho arc lossis pom tias nws nyuaj rau tsim cov welds zoo.
Tshaj li qhov teeb meem zoo, kev ua haujlwm tsis zoo ntawm cov roj thaiv kev ua haujlwm kuj tuaj yeem ua rau cov nqi hauv kev ua haujlwm. Tus nqi ntws siab dhau, piv txwv li, txhais tau tias koj nkim roj thiab siv nyiaj ntau dua los tiv thaiv cov roj ntau dua li qhov koj xav tau.
Cov nqi ntws uas siab dhau lossis qis dhau tuaj yeem ua rau porosity, uas tom qab ntawd yuav tsum tau siv sijhawm rau kev daws teeb meem thiab rov ua haujlwm dua. Tus nqi ntws qis dhau tuaj yeem ua rau muaj qhov tsis xws luag vim tias lub pas dej weld tsis muaj kev tiv thaiv zoo.
Tus nqi ntawm spatter tsim thaum lub sij hawm welding kuj muaj feem xyuam rau cov shielding gas siv. Ntau spatter txhais tau tias ntau lub sij hawm thiab nyiaj siv rau kev sib tsoo postweld.
Yuav Ua Li Cas Xaiv Cov Hluav Taws Xob Hluav Taws Xob
Ob peb yam txiav txim siab txoj cai tiv thaiv roj rau cov txheej txheem GMAW, suav nrog cov khoom siv, muab tub lim hlau, thiab vuam hloov hom.
Hom khoom.Qhov no tej zaum yuav yog qhov loj tshaj plaws los xav txog rau daim ntawv thov. Piv txwv li, carbon steel thiab txhuas muaj cov yam ntxwv sib txawv heev thiab yog li yuav tsum tau sib txawv shielding gases kom ua tiav qhov zoo tshaj plaws. Koj kuj yuav tsum tau coj mus rau hauv tus account cov khoom thickness thaum xaiv ib tug shielding roj.
Filler Hlau Hom.Cov hlau muab tub lim sib phim rau cov khoom siv hauv paus, yog li kev nkag siab cov khoom siv yuav tsum muab koj lub tswv yim zoo txog cov roj zoo tshaj plaws rau cov hlau muab tub lim thiab. Ntau cov txheej txheem weld specifications suav nrog cov ntsiab lus ntawm cov roj sib xyaw tuaj yeem siv nrog cov khoom siv tshwj xeeb.
Kev tiv thaiv roj kom zoo thiab kev tiv thaiv yog qhov tseem ceeb txij li lub sijhawm vuam arc raug ntaus. Daim duab no qhia tau hais tias du ntws ntawm sab laug, uas yuav npog lub pas dej ua ke, thiab turbulent ntws ntawm sab xis.
Vuam hloov hom.Nws tuaj yeem yog luv luv-circuit, tshuaj tsuag-arc, pulsed-arc, lossis globular hloov. Txhua hom ua ke zoo dua nrog qee qhov kev tiv thaiv gases. Piv txwv li, koj yuav tsum tsis txhob siv 100 feem pua argon nrog cov tshuaj tsuag hloov hom. Hloov chaw, siv cov sib tov xws li 90 feem pua argon thiab 10 feem pua carbon dioxide. Cov qib CO2 hauv cov roj sib tov yuav tsum tsis txhob tshaj 25 feem pua.
Lwm yam tseem ceeb uas yuav tsum xav txog suav nrog kev mus ncig ceev, hom kev nkag mus rau qhov sib koom ua ke, thiab ib feem haum. Puas yog qhov vuam tawm ntawm txoj haujlwm? Yog tias muaj, qhov ntawd tseem yuav cuam tshuam cov roj thaiv thaiv koj xaiv.
Shielding Gas Options for GMAW
Argon, helium, CO2, thiab oxygen yog cov khoom siv tiv thaiv ntau tshaj plaws siv hauv GMAW. Txhua lub roj muaj cov txiaj ntsig thiab qhov tsis zoo hauv txhua daim ntawv thov. Qee cov pa roj carbon monoxide zoo dua li lwm tus rau cov khoom siv feem ntau siv, txawm tias nws yog aluminium, me steel, carbon steel, low-alloy steel, lossis stainless hlau.
CO2 thiab oxygen yog reactive gases, txhais tau tias lawv cuam tshuam dab tsi tshwm sim hauv lub pas dej ua ke. Cov electrons ntawm cov pa roj no hnov mob nrog lub pas dej ua ke los tsim cov yam ntxwv sib txawv. Argon thiab helium yog inert gases, yog li lawv tsis hnov mob nrog cov khoom siv hauv paus lossis pas dej ua ke.
Piv txwv li, ntshiab CO2 muab qhov sib sib zog nqus weld nkag mus, uas yog qhov tseem ceeb rau vuam cov khoom tuab. Tab sis nyob rau hauv nws cov ntshiab daim ntawv nws tsim ib tug tsawg ruaj khov arc thiab ntau spatter piv rau thaum nws yog tov nrog lwm gases. Yog tias weld zoo thiab zoo li qhov tseem ceeb, qhov sib xyaw argon / CO2 tuaj yeem muab kev ruaj ntseg arc, vuam pas dej ua ke, thiab txo qhov tawg.
Yog li, cov pa roj twg ua ke zoo tshaj plaws nrog cov ntaub ntawv sib txawv?
Aluminium.Koj yuav tsum siv 100% argon rau txhuas. Kev sib xyaw argon / helium ua haujlwm zoo yog tias koj xav tau kev nkag mus tob dua lossis kev mus ncig sai dua. Tsis txhob siv cov pa hluav taws xob tiv thaiv nrog txhuas vim tias cov pa oxygen nyiam ua kom kub thiab ntxiv txheej txheej oxidation.
Me me hlau.Koj tuaj yeem ua ke cov khoom no nrog ntau hom kev tiv thaiv roj, suav nrog 100 feem pua CO2 lossis CO2 / argon mix. Raws li cov khoom tau thicker, ntxiv cov pa oxygen rau cov roj argon tuaj yeem pab nkag mus.
Cov pa roj carbon steel.Cov khoom no ua ke zoo nrog 100 feem pua CO2 lossis CO2 / argon mix. Tsawg-alloy steel. Ib qho 98 feem pua argon / 2 feem pua cov pa oxygen sib xyaw yog qhov zoo rau cov khoom siv no.
Kev siv cov khoom siv hluav taws xob tsis zoo los yog cov roj ntws tuaj yeem cuam tshuam qhov zoo ntawm vuam, cov nqi, thiab kev tsim khoom hauv koj daim ntawv thov GMAW.
Stainless hlau.Argon tov nrog 2 mus rau 5 feem pua CO2 yog tus qauv. Thaum koj xav tau cov pa roj carbon tsawg ntxiv hauv qhov vuam, siv argon nrog 1 mus rau 2 feem pua oxygen.
Yuav ua li cas-rau lub tswv yim Optimize shielding Gas Performance
Xaiv txoj cai tiv thaiv roj yog thawj kauj ruam mus rau kev vam meej. Kev ua kom zoo tshaj plaws-txuag lub sijhawm thiab nyiaj txiag-yuav tsum kom koj paub txog qee qhov kev coj ua zoo tshaj plaws uas tuaj yeem pab khaws cia cov pa roj thiab txhawb kev pabcuam kom zoo ntawm lub pas dej.
Tus nqi ntws. Tus nqi txaus txaus nyob ntawm ntau yam, suav nrog kev mus ncig ceev thiab tus nqi zeb nplai ntawm cov khoom siv hauv paus. Cov pa roj turbulent thaum lub sij hawm vuam feem ntau txhais tau hais tias tus nqi ntws, ntsuas hauv cubic feet ib teev (CFH), siab dhau, thiab qhov no tuaj yeem ua rau muaj teeb meem xws li porosity. Yog tias ib qho kev hloov pauv hloov pauv, qhov no tuaj yeem cuam tshuam cov roj ntws.
Piv txwv li, ua kom cov xaim pub ceev kuj nce qhov loj ntawm qhov vuam profile lossis kev mus ncig ceev, uas txhais tau hais tias koj yuav xav tau cov pa roj ntau dua kom ntseeg tau tias muaj kev pov hwm zoo.
Cov khoom siv.GMAW phom consumables, muaj xws li ib tug diffuser, hu rau lub taub hau, thiab nozzle, ua lub luag hauj lwm tseem ceeb nyob rau hauv kom ntseeg tau tias lub weld pas dej ua ke yog zoo tiv thaiv los ntawm huab cua. Yog hais tias lub nozzle yog nqaim dhau rau daim ntawv thov los yog yog tias lub diffuser tau txhaws nrog spatter, me me shielding gas yuav tau txais mus rau lub pas dej ua ke. Xaiv cov khoom siv uas tiv thaiv kev sib tsoo thiab muab qhov dav txaus nozzle bore kom ntseeg tau tias muaj roj txaus. Tsis tas li ntawd, nco ntsoov tias qhov kev sib cuag ntawm qhov chaw so yog qhov tseeb.
Gas Preflow.Khiav cov roj tiv thaiv ob peb vib nas this ua ntej tawm tsam arc tuaj yeem pab xyuas kom muaj kev pabcuam txaus. Siv cov roj preflow yuav pab tau tshwj xeeb tshaj yog thaum vuam sib sib zog nqus grooves los yog bevels uas yuav tsum tau ib tug ntev hlau stick-tawm. Ib qho kev ua ntej uas ua rau kev sib koom ua ke nrog cov roj ua ntej pib yuav tso cai rau koj txo qis cov roj ntws, yog li txuag roj thiab txo cov nqi.
Kev kho qhov system.Thaum siv lub tshuab hluav taws xob ntau, ua kev saib xyuas kom zoo los pab txhim kho kev ua haujlwm zoo. Txhua qhov kev sib txuas hauv qhov system yog qhov ua tau ntawm cov pa xau, yog li saib xyuas txhua qhov kev sib txuas kom paub tseeb tias lawv nruj. Txwv tsis pub, tej zaum koj yuav poob qee cov roj tiv thaiv uas koj xav tias tau mus rau qhov vuam.
Gas Regulator. Nco ntsoov siv txoj cai tswj hwm raws li cov roj sib xyaw uas koj siv. Kev sib tov meej yog qhov tseem ceeb rau kev tiv thaiv vuam. Kev siv tus tswj tsis raug rau cov roj sib xyaw, lossis siv cov khoom sib txuas tsis raug, tuaj yeem ua rau muaj kev txhawj xeeb txog kev nyab xeeb. Tshawb xyuas cov neeg tswj xyuas ntau zaus los pab xyuas kom lawv ua haujlwm zoo.
Phom tshiab.Yog tias koj siv rab phom tsis tu ncua, saib mus rau hauv cov qauv tshiab uas muaj cov txiaj ntsig, xws li cov kab me me sab hauv thiab cov kab hluav taws xob cais tawm, uas tso cai rau koj siv cov roj ntws qis dua. Qhov no pab tiv thaiv kev kub ntxhov hauv lub pas dej ua ke thaum tseem txuag roj.
Post lub sij hawm: Dec-30-2022
