Kev vuam laser feem ntau yog tsom rau kev txhim kho qhov ua tau zoo ntawm kev vuam thiab qhov zoo ntawm cov khoom siv nyias nyias thiab cov khoom ua haujlwm raug. Niaj hnub no peb yuav tsis tham txog qhov zoo ntawm kev vuam laser tab sis tsom mus rau yuav ua li cas siv cov pa roj tiv thaiv rau kev vuam laser kom raug.
Vim li cas ho siv roj tiv thaiv rau laser vuam?
Hauv kev vuam laser, cov pa roj tiv thaiv yuav cuam tshuam rau qhov vuam txoj kev, qhov zoo ntawm vuam, qhov tob ntawm vuam, thiab qhov dav ntawm vuam. Feem ntau, kev tshuab cov pa roj pab yuav muaj qhov zoo rau qhov vuam, tab sis nws kuj tseem yuav muaj cov teeb meem tsis zoo.
Thaum koj tshuab cov pa roj kom raug, nws yuav pab koj:
✦Tiv thaiv lub pas dej vuam kom zoo kom txo lossis tiv thaiv kev oxidation
✦Txo qhov txaws uas tsim tawm hauv cov txheej txheem vuam
✦Ua kom txo tau qhov weld pores
✦Pab kom lub pas dej vuam sib kis tau zoo thaum khov kho, kom cov hlua khi vuam los nrog ntug huv thiab du.
✦Qhov cuam tshuam ntawm cov hlau vapor plume lossis plasma huab cua ntawm lub laser raug txo qis, thiab qhov kev siv tau zoo ntawm lub laser nce ntxiv.
Tsuav yog lubHom roj tiv thaiv, tus nqi ntws roj, thiab kev xaiv hom tshuabYog tias yog lawm, koj tuaj yeem tau txais qhov zoo tshaj plaws ntawm kev vuam. Txawm li cas los xij, kev siv roj tiv thaiv tsis raug kuj tseem tuaj yeem cuam tshuam tsis zoo rau kev vuam. Kev siv hom roj tiv thaiv tsis raug yuav ua rau muaj suab nrov hauv qhov vuam lossis txo cov khoom siv kho tshuab ntawm qhov vuam. Qhov siab dhau lossis qis dhau ntawm cov roj ntws tuaj yeem ua rau muaj kev sib txhuam ntawm qhov vuam thiab kev cuam tshuam sab nraud ntawm cov khoom siv hlau hauv lub pas dej vuam, ua rau qhov vuam tawg lossis tsis sib xws.
Hom roj tiv thaiv
Cov roj tiv thaiv uas siv ntau tshaj plaws ntawm laser vuam yog N2, Ar, thiab He. Lawv cov khoom siv lub cev thiab tshuaj lom neeg txawv, yog li lawv cov teebmeem ntawm cov vuam kuj txawv.
Nitrogen (N2)
Lub zog ionization ntawm N2 yog qhov nruab nrab, siab dua li ntawm Ar, thiab qis dua li ntawm He. Nyob rau hauv lub teeb ntawm lub laser, qib ionization ntawm N2 nyob ntawm qhov sib npaug keel, uas tuaj yeem txo qhov kev tsim ntawm cov plasma huab thiab ua kom muaj kev siv zoo ntawm lub laser. Nitrogen tuaj yeem cuam tshuam nrog aluminium alloy thiab carbon steel ntawm qee qhov kub kom tsim cov nitrides, uas yuav txhim kho qhov brittleness ntawm weld thiab txo qhov toughness, thiab muaj kev cuam tshuam loj heev rau cov khoom siv kho tshuab ntawm cov pob qij txha weld. Yog li ntawd, nws tsis pom zoo kom siv nitrogen thaum vuam aluminium alloy thiab carbon steel.
Txawm li cas los xij, cov tshuaj lom neeg ntawm nitrogen thiab stainless hlau tsim los ntawm nitrogen tuaj yeem txhim kho lub zog ntawm qhov sib koom ua ke weld, uas yuav pab tau rau kev txhim kho cov khoom siv kho tshuab ntawm qhov weld, yog li kev vuam ntawm stainless hlau tuaj yeem siv nitrogen ua cov roj tiv thaiv.
Argon (Ar)
Lub zog ionization ntawm Argon yog qhov tsawg heev, thiab nws qib ionization ntawm nws yuav siab dua nyob rau hauv qhov kev ua ntawm laser. Tom qab ntawd, Argon, ua cov roj tiv thaiv, tsis tuaj yeem tswj tau qhov kev tsim ntawm cov huab plasma, uas yuav txo qhov kev siv zoo ntawm laser vuam. Lo lus nug tshwm sim: puas yog argon yog tus neeg sib tw tsis zoo rau kev siv vuam ua cov roj tiv thaiv? Cov lus teb yog Tsis yog. Vim yog cov roj inert, Argon nyuaj rau cuam tshuam nrog feem ntau ntawm cov hlau, thiab Ar pheej yig siv. Tsis tas li ntawd, qhov ceev ntawm Ar yog loj, nws yuav ua rau poob rau ntawm qhov chaw ntawm lub pas dej vuam thiab tuaj yeem tiv thaiv lub pas dej vuam zoo dua, yog li Argon tuaj yeem siv ua cov roj tiv thaiv ib txwm muaj.
Helium (He)
Tsis zoo li Argon, Helium muaj lub zog ionization siab heev uas tuaj yeem tswj tau qhov kev tsim ntawm cov huab plasma yooj yim. Tib lub sijhawm, Helium tsis teb nrog cov hlau. Nws yog qhov kev xaiv zoo rau kev vuam laser. Qhov teeb meem tsuas yog tias Helium kim heev. Rau cov neeg tsim khoom uas muab cov khoom siv hlau ntau lawm, helium yuav ntxiv ntau rau tus nqi tsim khoom. Yog li helium feem ntau yog siv rau hauv kev tshawb fawb lossis cov khoom lag luam uas muaj nqi ntxiv siab heev.
Yuav ua li cas tshuab lub shield gas?
Ua ntej tshaj plaws, nws yuav tsum paub meej tias qhov hu ua "oxidation" ntawm lub vuam tsuas yog lub npe dav dav xwb, uas hais txog kev sib xyaw tshuaj ntawm lub vuam thiab cov khoom phom sij hauv huab cua, ua rau lub vuam puas tsuaj. Feem ntau, cov hlau vuam sib xyaw nrog oxygen, nitrogen, thiab hydrogen hauv huab cua ntawm qee qhov kub.
Yuav kom tiv thaiv tau qhov vuam kom tsis txhob raug "oxidized" yuav tsum txo lossis zam kev sib cuag ntawm cov khoom phom sij thiab cov hlau vuam hauv qab qhov kub siab, uas tsis yog tsuas yog nyob rau hauv cov hlau pas dej uas yaj xwb tab sis tag nrho lub sijhawm txij li lub sijhawm uas cov hlau vuam yaj mus txog thaum cov hlau pas dej uas yaj khov thiab nws qhov kub txias mus rau qee qhov kub.
Ob txoj hauv kev tseem ceeb ntawm kev tshuab cov pa roj tiv thaiv
▶Muaj ib tug tshuab cov pa roj tiv thaiv rau ntawm sab axis, raws li pom hauv Daim Duab 1.
▶Qhov thib ob yog txoj kev tshuab coaxial, raws li pom hauv Daim Duab 2.
Daim Duab 1.
Daim Duab 2.
Qhov kev xaiv tshwj xeeb ntawm ob txoj kev tshuab yog qhov yuav tsum tau xav txog ntau yam. Feem ntau, nws raug pom zoo kom siv txoj kev ntawm cov pa roj tiv thaiv sab.
Qee cov piv txwv ntawm laser welding
1. Kev vuam ncaj / kab
Raws li pom hauv Daim Duab 3, cov duab vuam ntawm cov khoom yog linear, thiab daim ntawv sib koom ua ke tuaj yeem yog lub pob tw sib koom ua ke, lub duav sib koom ua ke, lub ces kaum tsis zoo, lossis lub pob vuam sib koom ua ke. Rau hom khoom no, nws yog qhov zoo dua los siv cov pa tiv thaiv sab-axis raws li pom hauv Daim Duab 1.
2. Kaw daim duab lossis thaj chaw vuam
Raws li pom hauv Daim Duab 4, cov duab vuam ntawm cov khoom yog cov qauv kaw xws li lub voj voog ntawm lub dav hlau, lub voj voog ntau lub dav hlau, lub voj voog ntau ntu kab, thiab lwm yam. Cov duab sib koom ua ke tuaj yeem yog lub pob tw sib koom ua ke, lub voj voog ntawm lub duav, kev vuam sib tshooj, thiab lwm yam. Nws yog qhov zoo dua los siv txoj kev tiv thaiv roj coaxial raws li pom hauv Daim Duab 2 rau hom khoom no.
Kev xaiv cov roj tiv thaiv ncaj qha cuam tshuam rau qhov zoo ntawm kev vuam, kev ua haujlwm zoo, thiab tus nqi tsim khoom, tab sis vim muaj ntau yam khoom siv vuam, hauv cov txheej txheem vuam tiag tiag, kev xaiv cov roj vuam yog qhov nyuaj dua thiab xav tau kev txiav txim siab dav dav ntawm cov khoom siv vuam, txoj kev vuam, qhov chaw vuam, nrog rau cov kev xav tau ntawm cov nyhuv vuam. Los ntawm kev sim vuam, koj tuaj yeem xaiv cov roj vuam uas tsim nyog dua kom ua tiav cov txiaj ntsig zoo dua.
Xav paub txog kev vuam laser thiab xav kawm paub xaiv cov roj tiv thaiv
Cov Kev Txuas Sib Xws:
Lub sijhawm tshaj tawm: Lub Kaum Hli-10-2022