Xaiv thiab siv roj av thaum lub sijhawm vuam
1. Cov tub ntxhais lub luag haujlwm ntawm cov roj av hauv laser vuam
· Zam cov pas dej Molten: Tiv thaiv cov dej hiav txwv oxidation thiab nitrogen, ecygen, nitrogen, thiab zam kev tsis txaus siab xws li pores thiab tawg.
· Pab tiv thaiv cov pas dej Molten kev nrawm ntawm cov pas dej ua ke nrawm ntawm lub pas dej Molten los ntawm Airflow los txhim kho microstructure thiab cov khoom ntawm Weld Seam.
Kev tshem tawm kev tawg: txo cov kev sib kis ntawm lub lens lossis workpiece nto tshwm sim los ntawm hlau txaws thaum vuam.
· Kev tswj cov ntshav: thaum lub sijhawm high-zog laser vuam, suppressing qhov nqus ntawm lub plasma huab los txhim kho kev siv hluav taws xob.
2.ommon roj hom thiab cov yam ntxwv siv hauv laser vuam
Inert gases (tsuas yog siv rau kev tiv thaiv)
Argon (AR): Kev kub ceev, kev tiv thaiv kev tiv thaiv zoo, tus nqi qis; Cov pa hluav taws xob ruaj khov, tsis tshua muaj cua sib txuas.
Helium (nws): Tsawg ntom ntom thiab siab thermal conductivity, uas tuaj yeem ua kom muaj txiaj ntsig zoo rau kev nkag mus ntawm qhov muaj peev xwm sib sib zog nqus Txawm li cas los xij, tus nqi yog high.suitable rau high-pilling laser laser vuam ntawm cov hlau tuab (xws li rau scenarios yog qhov siab vuam yuav tsum muaj.
· Nquag roj (siv rau cov ntaub ntawv tshwj xeeb lossis cov txheej txheem)
Cov pa roj carbon dioxide (CO₂):
Nws reacts nrog cov hlau los ua co, uas tuaj yeem txo cov ntug dej nro thiab txhim kho lub pas dej moltenity. Txawm li cas los xij, nws yog tus nquag ua rau weld oxidation.
Muaj feem xyuam nrog cov xwm txheej: Tsawg cov roj av vuam (yuav tsum tau siv ua ke nrog lwm cov roj av), lossis rau laser-mig compbeite vuam.
Nitrogen (n₂):
Nws yog tus nqi-ua tau zoo, tab sis nws yooj yim cov tawv thiab nkig nitrides nrog cov hlau thiab txhuas, cuam tshuam rau kev nruj ntawm Weld.
Muaj feem xyuam nrog cov xwm txheej: Stainless hlau sab saum npoo sealing vuam (rau cov qauv tsis yog-tseem ceeb), lossis tooj liab alloy vuam (rau inhibit oxidation).
3.Qhov qhov tseem ceeb rau kev xaiv roj
· Voov hom
Aluminium Alloy: nyiam siv Ntshiab Argon (AR), zam cov nitrogen-induced emgrittlement; Kom tuab daim hlau, xav txog kev sib xyaw argon-helium (piv txwv li ar: nws=7: 3).
Carbon steel / stainless steel: Thin plates use argon, medium-thick plates (>5 hli) Siv Helium lossis Argon-helium sib tov kom nce qhov tob nkag; rau cov tawv roj roj carbon tsawg, ib qho me me ntawm kev sib xyaw (<5%) can be added to improve the fluidity of the molten pool.
Tooj liab \/ Titanium alloy: Tooj liab Vuam siv kev sib cav lossis cov tshuaj pleev xim rau oxidation), titanium alloy siv ntau-kev ceev siab argon (kom tsis txhob nitriving).
· Voog txheej txheem tsis pom zoo
High-power continuous welding (>2kW): Siv Helium lossis Argon-Hely Sib tov, txo ntshav daim thaiv ntshav;
Tsawg-hwj huam pulsed vuam (<1kW): Pure argon is sufficient, with low cost and stable protection effect.
· Vove Kev Ua Tau Zoo
Welds nrog cov khoom muaj zog (xws li Aerospace Cheebtsam): Tsis txhob nitrogen, xum argon lossis helium;
Welds nrog lub ntsej muag siab yuav tsum: Siv cov argon lossis helium los txo cov khoom sib tw thiab oxide Oxide.
4.Key cov ntsiab lus rau kev siv roj av
Elcas · roj purity tswj
Lub purity ntawm inert gases yuav tsum muaj ntau dua los yog sib npaug rau 99.99% (impurities xws li dej thiab cov pa yuav ua rau Weld Porosity);
Lub purity of active gases (xws li boos) yuav tsum muaj ntau dua los yog sib npaug ntawm 99.5%, thiab lawv yuav tsum tau qhuav (kom tsis txhob ya raws li herrogen ua rau hydrogen pores).
· Roj roj ntws txoj cai
Qhov tsawg ntws: kev tiv thaiv tsis txaus, nquag mus rau oxidation;
Cov nyiaj ntws khiav kub: cov pa roj hmab, huab cua nrog, thiab nws yuav tawg ntawm cov pas dej ua ke hlau.
Kev siv qhov tseem ceeb:
Argon Roj: Cov phaj nyias vuam ({0}} mm)} l \/ min, nruab nrab-tuab phaj ({} l \/ min;
Helium Gas: tus nqi txaus yuav tsum yog 30% {{% siab dua li ntawm kev sib cav (vim nws cov roj ntws qis dua yog tsim nyog los tsim cov roj tiv thaiv).
· Nozzle tsim thiab chaw haujlwm
Nozzle Incher: feem ntau 6-10 mm, lub taub loj dua yuav tsum tau muaj qhov nce ntxiv rau txhaws;
Qhov kev ncua deb ntawm nozzle thiab workpiece: {5-8 mm, dhau ze tuaj yeem tsis yooj yim los ntawm kev txaws, thiab dhau deb dhau los txo cov nyhuv tiv thaiv.
· Airflow Qhia Kev Tswj Xyuas
Tshuab hauv tib txoj kev taw qhia raws li kev coj ua vuam: haum rau high-ceev vuam, txo cov kev cuam tshuam ntawm airflow ntawm Molten pas dej;
Sab tshuab: haum rau kev sib sib zog nqus vuam, zoo dua rau cov tshuab ntshav tseg kom deb li ntshav.
5. Cov kev ceev faj
Guelphy li kev phom sij ntawm cov roj inert
Argon thiab Helium yog muaj xim tsis muaj kob thiab ntxhiab tsw ntxhiab. Ntawm cov siab loj, lawv yuav tshem tawm cov pa oxygen. Thaum lub sijhawm ua haujlwm, qhov cua yuav tsum raug tswj kom tsis txhob siv rau kev siv lawv hauv qhov chaw uas ntim nrog.
· Qhov Kev Txaus Siab thiab Kev Txhaum Kev Pheej Hmoo ntawm Cov Khoom Siv Hluav Taws Xob
Kev sib tw sib zog ntau dhau tuaj yeem ua rau ua pa nyuaj. Nitrogen, thaum rhuab, rov qab nrog cov hlau thiab tuaj yeem tsim cov tshuaj lom nitrogen oxides. Daim npog qhov muag tiv thaiv yuav tsum hnav;
Zam kev sib xyaw cov roj cua nrog cov pa roj av nrog cov tshuaj acetylene) kom tiv thaiv kom tsis txhob tawg.
· Roj tswj
Cov khoom siv roj thooj voos kheej yuav tsum muab khaws cia ruaj khov, khaws cia kom deb ntawm cov cua kub thiab cov hluav taws kub tau tswj hwm los ntawm lub siab reducer (feem ntau}. {1}}. 5 mpa)
-- Ncaws tshav laser laser Camila Wang