Scope ntawm daim ntawv thov ntawmlaser vuam tshuabtau dhau los ua ntau thiab ntau dua, tab sis cov kev xav tau kuj tau nce thiab siab dua.Thaum lub sij hawm vuam txheej txheem, shielding roj yuav tsum tau tshuab kom ntseeg tau tias cov nyhuv vuam ntawm cov khoom zoo nkauj.Yog li yuav ua li cas siv cov cua tshuab kom raug hauv cov txheej txheem hlau laser vuam?
Nyob rau hauv laser vuam, shielding gas cuam tshuam rau weld tsim, weld zoo, weld nkag thiab dav, thiab lwm yam. Feem ntau, tshuab shielding gas yuav muaj txiaj ntsig zoo rau cov vuam, tab sis nws kuj tuaj yeem muaj kev puas tsuaj yog tias siv tsis raug.
Cov nyhuv zoo ntawm shielding gas raulaser vuam tshuab:
1. Kev ua kom raug cua tshuab tiv thaiv tau zoo tuaj yeem tiv thaiv lub pas dej ua ke kom txo tau oxidation, lossis txawm tias tsis txhob oxidized.
2. Nws tuaj yeem txo cov spatter tsim nyob rau hauv cov txheej txheem vuam, thiab ua lub luag haujlwm ntawm kev tiv thaiv lub tsom iav lossis iav tiv thaiv.
3. Nws tuaj yeem txhawb nqa kev sib kis ntawm lub pas dej weld thaum nws solidifies, kom cov weld yog uniform thiab zoo nkauj.
4. Ua tau zoo txo cov qhov hws ntawm weld.
Raws li ntev raws li hom roj, cov roj ntws thiab tshuab tshuab raug xaiv kom raug, cov nyhuv zoo tagnrho tuaj yeem tau txais.Txawm li cas los xij, kev siv tsis raug ntawm kev tiv thaiv roj kuj tuaj yeem muaj kev cuam tshuam tsis zoo rau kev vuam.
Cov teebmeem tsis zoo ntawm kev siv tsis raug ntawm kev tiv thaiv roj ntawm laser vuam:
1. Kev siv tsis raug ntawm cov khoom siv tiv thaiv yuav ua rau cov welds tsis zoo.
2. Xaiv qhov tsis ncaj ncees lawm ntawm cov roj yuav ua rau cov kab nrib pleb hauv cov vuam thiab kuj tseem tuaj yeem ua rau txo cov khoom siv ntawm cov vuam.
3. Xaiv qhov tsis ncaj ncees lawm cov roj tshuab ntws yuav ua rau oxidation hnyav dua ntawm qhov vuam (txawm tias qhov ntws ntws loj dhau lossis me dhau), lossis nws kuj tseem tuaj yeem ua rau lub pas dej vuam hlau ua rau muaj kev cuam tshuam loj heev los ntawm sab nraud quab yuam, ua rau muaj kev cuam tshuam loj heev ntawm cov hlau. weld kom tawg los yog tsim unevenly.
4. Xaiv txoj kev siv roj tshuab tsis raug yuav ua rau lub vuam tsis ua tiav lossis txawm tias tsis muaj kev tiv thaiv los yog muaj kev cuam tshuam tsis zoo rau kev tsim vuam.
Hom kev tiv thaiv roj:
Feem ntau sivlaser vuamshielding gases feem ntau yog N2, Ar, Nws, thiab lawv lub cev thiab tshuaj lom neeg cov khoom sib txawv, yog li cov nyhuv ntawm cov vuam kuj txawv.
Argon
Lub zog ionization ntawm Ar yog qhov tsawg, thiab cov qib ntawm ionization nyob rau hauv qhov kev txiav txim ntawm lub laser yog qhov siab, uas tsis tsim nyog rau kev tswj cov txheej txheem ntawm cov huab plasma, thiab yuav muaj qee yam cuam tshuam rau kev siv lub laser.Txawm li cas los xij, kev ua haujlwm ntawm Ar yog qhov tsawg heev, thiab nws nyuaj rau kev tshuaj lom neeg nrog cov hlau sib txawv.cov tshuaj tiv thaiv, thiab tus nqi ntawm Ar tsis siab.Tsis tas li ntawd, qhov ntom ntawm Ar yog qhov loj, uas yog qhov tsim nyog rau kev tso dej rau sab saum toj ntawm lub pas dej weld, uas tuaj yeem tiv thaiv lub pas dej weld zoo dua, yog li nws tuaj yeem siv tau raws li cov pa roj shielding.
Nitrogen N2
Lub zog ionization ntawm N2 yog nruab nrab, siab dua li ntawm Ar, thiab qis dua ntawm Nws.Nyob rau hauv qhov kev txiav txim ntawm laser, ionization degree yog qhov nruab nrab, uas tuaj yeem txo qhov tsim ntawm plasma huab, yog li ua kom muaj txiaj ntsig zoo ntawm laser.Nitrogen tuaj yeem cuam tshuam nrog aluminium alloy thiab carbon hlau ntawm qhov kub thiab txias los tsim cov nitrides, uas yuav ua rau kom cov brittleness ntawm cov vuam thiab txo cov toughness, uas yuav muaj kev cuam tshuam ntau dua rau cov khoom siv ntawm cov khoom sib txuas, yog li nws yog tsis pom zoo kom siv nitrogen.Aluminium alloy thiab carbon steel welds yog tiv thaiv.Cov nitride uas tsim los ntawm cov tshuaj tiv thaiv ntawm nitrogen thiab stainless hlau tuaj yeem txhim kho lub zog ntawm kev sib koom ua ke, uas yuav pab txhim kho cov khoom siv ntawm cov vuam, yog li nitrogen tuaj yeem siv los ua cov roj tiv thaiv thaum vuam stainless hlau.
Helium Nws
Nws muaj lub zog ionization siab tshaj plaws, thiab qib ionization tsawg heev nyob rau hauv qhov kev txiav txim ntawm lub laser, uas tuaj yeem tswj tau qhov tsim ntawm cov huab cua hauv plasma.Nws yog ib qho zoo weld shielding gas, tab sis tus nqi ntawm Nws yog siab dhau lawm.Feem ntau, cov pa roj no tsis yog siv rau hauv cov khoom lag luam loj.Nws feem ntau yog siv rau kev tshawb fawb txog kev tshawb fawb lossis cov khoom lag luam nrog tus nqi ntxiv.
Tam sim no muaj ob txoj kev tshuab tshuab rau kev tiv thaiv roj: sab-ncej tshuab thiab coaxial tshuab
Daim duab 1: Sab-ncej tshuab
Daim duab 2: Coaxial Blowing
Yuav ua li cas xaiv ob txoj kev tshuab yog ib qho kev xav zoo.Feem ntau, nws raug pom zoo kom siv sab tshuab tiv thaiv roj txoj kev.
Kev xaiv txoj cai ntawm kev tiv thaiv roj cua tshuab: nws yog qhov zoo dua los siv paraxial rau txoj kab ncaj nraim, thiab coaxial rau dav hlau kaw cov duab.
Ua ntej tshaj plaws, nws yuav tsum paub meej tias lub npe hu ua "oxidation" ntawm qhov vuam tsuas yog ib lub npe xwb.Nyob rau hauv txoj kev xav, nws txhais tau hais tias cov weld yog chemically reacted nrog teeb meem Cheebtsam nyob rau hauv cov huab cua, ua rau lub deterioration ntawm qhov zoo ntawm weld.Nws yog ib qho uas cov hlau weld yog nyob rau ntawm qhov kub thiab txias.Reacts chemically nrog oxygen, nitrogen, hydrogen, thiab lwm yam hauv huab cua.
Tiv thaiv lub vuam los ntawm "oxidized" yog los txo lossis tiv thaiv cov khoom tsim kev puas tsuaj los ntawm kev sib cuag nrog cov hlau vuam ntawm qhov kub thiab txias, tsis yog lub pas dej molten hlau xwb, tab sis txij li lub sij hawm cov hlau vuam yog yaj mus txog rau thaum lub pas dej ua ke hlau solidifies. thiab nws qhov kub thiab txias poob qis dua ib qho kub ntawm lub sijhawm.
Piv txwv li, titanium alloy vuam tuaj yeem nqus tau hydrogen sai sai thaum qhov kub siab tshaj 300 ° C, oxygen tuaj yeem nqus tau sai thaum qhov kub siab tshaj 450 ° C, thiab nitrogen tuaj yeem nqus tau sai thaum nws siab tshaj 600 ° C, yog li cov titanium. alloy weld yog solidified thiab kub txo mus rau 300 ° C Cov theem hauv qab no yuav tsum tau tiv thaiv zoo, txwv tsis pub lawv yuav "oxidized".
Nws tsis yog qhov nyuaj rau kev nkag siab los ntawm cov lus piav qhia saum toj no hais tias lub tshuab hluav taws xob tiv thaiv tsis yog tsuas yog xav tau los tiv thaiv lub pas dej welding raws sijhawm, tab sis kuj yuav tsum tau tiv thaiv thaj chaw uas tsuas yog solidified uas tau welded, yog li feem ntau ntawm sab ncej. qhia hauv daim duab 1 yog siv.Tshuab lub shielding gas, vim hais tias qhov kev tiv thaiv ntau yam ntawm txoj kev no yog dav dua li ntawm cov coaxial tiv thaiv txoj kev nyob rau hauv daim duab 2, tshwj xeeb tshaj yog nyob rau hauv lub cheeb tsam uas cov weld tau cia li solidified muaj kev tiv thaiv zoo dua.
Rau cov ntawv thov engineering, tsis yog txhua yam khoom siv tuaj yeem siv cov khoom siv sab nraud ntawm lub tshuab hluav taws xob.Rau qee cov khoom tshwj xeeb, tsuas yog coaxial shielding gas tuaj yeem siv tau, uas yuav tsum tau nqa tawm los ntawm cov khoom tsim thiab daim ntawv sib koom ua ke.Lub hom phiaj xaiv.
Xaiv cov txheej txheem tiv thaiv roj cua tshwj xeeb:
1. Ncaj Welds
Raws li pom nyob rau hauv daim duab 3, cov duab ntawm lub vuam seam ntawm cov khoom yog ib txoj kab ncaj nraim, thiab daim ntawv sib koom ua ke yog lub pob tw, lub puab tsaig sib koom tes, lub kaum sab xis ntawm lub kaum sab xis sib koom ua ke los yog lub puab tsaig welded.Nws yog qhov zoo dua los tshuab kev tiv thaiv roj rau ntawm tus ncej sab.
Daim duab 3: Ncaj Welds
2. Flat kaw graphic welds
Raws li pom nyob rau hauv daim duab 4, cov duab ntawm lub vuam seam ntawm cov khoom yog ib tug kaw zoo xws li lub dav hlau voj voog, ib tug dav hlau polygon, thiab ib tug dav hlau multi-segment kab.Nws yog qhov zoo dua los siv cov coaxial shielding roj txoj kev qhia hauv daim duab 2.
Daim duab 4: Flat Closed Graphic Welds
Cov kev xaiv ntawm shielding roj ncaj qha cuam tshuam qhov zoo, efficiency thiab nqi ntawm vuam ntau lawm.Txawm li cas los xij, vim muaj kev sib txawv ntawm cov khoom siv vuam, kev xaiv cov roj vuam kuj tseem cuam tshuam rau hauv cov txheej txheem vuam tiag tiag.Nws yog ib qho tsim nyog yuav tsum ua tib zoo xav txog cov khoom siv vuam, vuam txoj kev, thiab vuam txoj haujlwm.Raws li qhov yuav tsum tau muaj cov nyhuv vuam, tsuas yog los ntawm kev ntsuas vuam tuaj yeem xaiv cov roj vuam zoo dua kom ua tiav cov txiaj ntsig zoo dua.
Post lub sij hawm: May-08-2023
