Laser vuam yog tsuas yog tsom rau kev txhim kho vuam efficiency thiab zoo ntawm nyias phab ntsa cov ntaub ntawv thiab precision qhov chaw. Niaj hnub no peb yuav tsis tham txog qhov zoo ntawm laser welding tab sis tsom mus rau yuav ua li cas siv shielding gases rau laser vuam kom zoo.
Vim li cas siv cov ntaub thaiv npog rau laser vuam?
Nyob rau hauv laser welding, shield gas yuav cuam tshuam lub vuam txoj kev, weld zoo, weld qhov tob, thiab weld dav. Feem ntau, tshuab cov pa pab cuam yuav muaj txiaj ntsig zoo rau cov vuam, tab sis nws kuj tuaj yeem ua rau muaj kev cuam tshuam tsis zoo.
Thaum koj tshuab shield gas kom raug, nws yuav pab tau koj:
✦Ua tau zoo tiv thaiv lub pas dej weld kom txo lossis txawm tias tsis txhob oxidation
✦Ua tau zoo txo cov txaws uas ua rau hauv cov txheej txheem vuam
✦Ua tau zoo txo cov qhov pores
✦Pab lub pas dej weld kis tusyees thaum solidification, kom cov weld seam tuaj nrog ib tug huv thiab du ntug.
✦Cov nyhuv shielding ntawm cov hlau vapor plume los yog plasma huab ntawm lub laser yog txo kom zoo, thiab kev siv tau zoo ntawm lub laser yog nce.
Ntev npaum li qhovshield gas hom, gas flow rate, thiab tshuab xaiv homyog lawm, koj tuaj yeem tau txais cov txiaj ntsig zoo ntawm vuam. Txawm li cas los xij, kev siv tsis raug ntawm cov roj tiv thaiv kuj tuaj yeem cuam tshuam rau vuam. Kev siv yam tsis raug ntawm cov ntaub thaiv npog tuaj yeem ua rau creaks hauv qhov vuam lossis txo cov khoom siv ntawm cov vuam. Qhov siab dhau los yog qis dhau ntawm cov pa roj ntws tuaj yeem ua rau muaj kev cuam tshuam loj ntawm weld oxidation thiab kev cuam tshuam loj heev ntawm cov khoom hlau hauv lub pas dej ua ke, uas ua rau weld vau lossis tsis sib xws.
Hom ntaub thaiv npog gas
Feem ntau siv cov roj siv tiv thaiv ntawm laser vuam yog feem ntau N2, Ar, thiab Nws. Lawv lub cev thiab tshuaj muaj zog sib txawv, yog li lawv cov teebmeem ntawm welds kuj txawv.
Nitrogen (N2)
Lub zog ionization ntawm N2 yog nruab nrab, siab dua li ntawm Ar, thiab qis dua ntawm Nws. Nyob rau hauv cov hluav taws xob ntawm lub laser, lub ionization degree ntawm N2 nyob twj ywm ntawm ib tug txawm keel, uas yuav zoo dua txo cov tsim ntawm ib tug plasma huab thiab ua rau kom cov kev siv ntawm lub laser. Nitrogen tuaj yeem hnov mob nrog aluminium alloy thiab carbon steel ntawm qhov kub thiab txias los tsim nitrides, uas yuav txhim kho weld brittleness thiab txo cov tawv nqaij, thiab muaj kev cuam tshuam zoo rau cov khoom siv ntawm cov pob qij txha. Yog li ntawd, nws tsis pom zoo kom siv nitrogen thaum vuam aluminium alloy thiab carbon hlau.
Txawm li cas los xij, cov tshuaj tiv thaiv ntawm nitrogen thiab stainless hlau tsim los ntawm nitrogen tuaj yeem txhim kho lub zog ntawm kev sib koom ua ke, uas yuav muaj txiaj ntsig zoo los txhim kho cov khoom siv ntawm cov khoom siv vuam, yog li vuam ntawm stainless hlau tuaj yeem siv nitrogen los tiv thaiv cov roj.
Argon (zeeg)
Lub zog ionization ntawm Argon yog qhov tsawg, thiab nws cov qib ionization ntawm nws yuav ua siab dua nyob rau hauv qhov kev txiav txim ntawm lub laser. Tom qab ntawd, Argon, raws li cov khoom siv tiv thaiv, tsis tuaj yeem tswj kev tsim cov huab cua hauv plasma, uas yuav txo qhov kev siv ntawm laser vuam. Cov lus nug tshwm sim: Puas yog argon yog ib tus neeg sib tw tsis zoo rau kev siv vuam siv los tiv thaiv roj? Cov lus teb yog Tsis yog. Ua ib qho roj inert, Argon yog qhov nyuaj rau kev hnov mob nrog feem ntau ntawm cov hlau, thiab Ar yog pheej yig siv. Tsis tas li ntawd, qhov ntom ntawm Ar yog qhov loj, nws yuav ua rau muaj kev cuam tshuam rau qhov chaw ntawm lub pas dej molten thiab tuaj yeem tiv thaiv lub pas dej weld zoo dua, yog li Argon tuaj yeem siv los ua cov pa roj tiv thaiv.
Helium (zeeg)
Tsis zoo li Argon, Helium muaj lub zog ionization siab uas tuaj yeem tswj kev tsim cov huab cua hauv plasma yooj yim. Tib lub sijhawm, Helium tsis hnov mob nrog cov hlau. Nws yog qhov kev xaiv zoo rau laser vuam. Qhov teeb meem tsuas yog tias Helium kuj kim heev. Rau cov fabricators uas muab cov khoom loj-tsim hlau, helium yuav ntxiv ntau npaum li cas rau cov nqi tsim khoom. Yog li helium feem ntau yog siv rau hauv kev tshawb fawb tshawb fawb lossis cov khoom lag luam nrog tus nqi siab ntxiv.
Yuav ua li cas tshuab lub shield gas?
Ua ntej tshaj plaws, nws yuav tsum paub meej tias lub npe hu ua "oxidation" ntawm cov vuam tsuas yog ib lub npe xwb, uas yog hais txog cov tshuaj tiv thaiv ntawm cov vuam thiab cov khoom tsis zoo hauv cov huab cua, ua rau lub vuam tsis zoo. . Feem ntau, cov hlau weld reacts nrog oxygen, nitrogen, thiab hydrogen hauv huab cua ntawm qhov kub thiab txias.
Txhawm rau tiv thaiv lub vuam los ntawm "oxidized" yuav tsum tau txo lossis zam kev sib cuag ntawm cov khoom tsim kev puas tsuaj thiab cov hlau vuam nyob rau hauv qhov kub thiab txias, uas tsis yog tsuas yog nyob rau hauv lub pas dej ua ke hlau, tab sis tag nrho lub sij hawm los ntawm lub sij hawm thaum lub weld hlau yog melted mus txog rau thaum lub welding hlau. molten pas dej ua ke hlau yog solidified thiab nws kub yog txias mus rau ib tug tej yam kub.
Ob txoj hauv kev tseem ceeb ntawm kev siv cov ntaub thaiv npog gas
▶Ib qho yog tshuab hluav taws xob thaiv ntawm sab axis, raws li pom hauv daim duab 1.
▶Lwm qhov yog coaxial tshuab tshuab, raws li qhia hauv daim duab 2.
Daim duab 1.
Daim duab 2.
Qhov kev xaiv tshwj xeeb ntawm ob txoj kev tshuab tshuab yog ib qho kev xav txog ntau yam. Nyob rau hauv dav dav, nws yog pom zoo kom txais yuav txoj kev ntawm sab-blowing tiv thaiv roj.
Qee qhov piv txwv ntawm laser vuam
1. Ncaj hlaws / kab vuam
Raws li pom nyob rau hauv daim duab 3, lub weld zoo ntawm cov khoom yog linear, thiab daim ntawv sib koom ua ke yuav ua tau ib tug pob tw, lap joint, tsis zoo ces kaum sib koom, los yog overlapped welding ob leeg. Rau hom khoom no, nws yog qhov zoo dua los txais yuav lub sab-axis tshuab tiv thaiv roj raws li qhia hauv daim duab 1.
2. Kaw daim duab lossis thaj chaw vuam
Raws li pom nyob rau hauv daim duab 4, lub weld zoo ntawm cov khoom yog ib tug kaw qauv xws li dav hlau ncig, dav hlau multilateral zoo, dav hlau multi-segment linear duab, thiab lwm yam. Nws yog qhov zoo dua los siv cov coaxial tiv thaiv roj raws li qhia hauv daim duab 2 rau hom khoom no.
Kev xaiv cov roj tiv thaiv ncaj qha cuam tshuam rau vuam zoo, kev ua tau zoo, thiab tus nqi ntawm cov khoom siv, tab sis vim muaj ntau yam ntawm cov khoom siv vuam, nyob rau hauv cov txheej txheem vuam tiag tiag, kev xaiv cov roj vuam yog qhov nyuaj dua thiab xav tau kev xav txog cov khoom siv vuam, vuam. txoj kev, vuam txoj hauj lwm, raws li zoo raws li qhov yuav tsum tau ntawm cov welding nyhuv. Los ntawm cov kev ntsuam xyuas vuam, koj tuaj yeem xaiv cov vuam zoo dua kom ua tiav cov txiaj ntsig zoo dua.
Txaus siab rau laser vuam thiab txaus siab kawm yuav ua li cas xaiv cov ntaub thaiv npog roj
Txuas Txuas:
Post lub sij hawm: Oct-10-2022