Aluminium thiab aluminium alloys yog dav siv nyob rau hauv kev tsim kho, tsheb thauj mus los, tsheb, electronics, ntim thiab aerospace teb vim lawv lub teeb yuag, siab zog thiab corrosion kuj. Nrog rau kev txhim kho thev naus laus zis, aluminium alloy vuam txheej txheem tau txhim kho. Laser welding yog ib qho kev siv vuam siv tshuab hauv kev lag luam tam sim no, uas muaj qhov zoo ntawm cov khoom siv hluav taws xob muaj zog, qhov chaw me me ntawm cov cua sov, tsis muaj deformation, txuag hluav taws xob thiab txo kev noj.
Nyob rau hauv cov txheej txheem vuam niaj hnub, vim muaj cov khoom tshwj xeeb ntawm txhuas, laser vuam ntawm aluminium thiab aluminium alloy yuav nyuaj rau kev tswj lub laser tsom thiab lub pas dej molten; Thaum tus welder teeb tsa cov txheej txheem tsis raug lossis tsis muaj kev paub nplua nuj, tej zaum yuav muaj porosity, tawg thiab deformation, blackening ntawm weld thiab tom npoo tsis sib koom ua ke thiab lwm yam teeb meem, uas cuam tshuam rau qhov zoo ntawm vuam thiab nws cov kev ua tau zoo. Tom ntej no, peb yuav qhia txog cov teeb meem thiab cov kev daws teeb meem uas tau ntsib hauv vuam aluminium.
Porosity
Qhov teeb meem tseem ceeb tshwm sim thaum vuam aluminium nrog lub laser yog porosity. Thaum lub sij hawm welding txheej txheem, lub laser beam ua rau fluctuations nyob rau hauv lub molten hlau, thiab thaum cov roj daig nyob rau hauv cov hlau expands thiab spills tawm, porosity tshwm sim. Tsis tas li ntawd, aluminium oxide zaj duab xis tiv thaiv kev sib txuas ntawm cov hlau, adsorbs ya raws, thiab muaj kev cuam tshuam rau impurities, uas txhawb kev tsim cov porosity.
Qhov tsim ntawm porosity ua rau tsis muaj zog welds, txo corrosion kuj thiab unsightly welds. Feem ntau, cov kev ntsuas hauv qab no raug pom zoo:
Kho qhov tsim nyog lub zog laser kom ntseeg tau tias cov khoom siv hluav taws xob zoo ib yam.
Thaum welding nyias daim hlau, nws raug nquahu kom ua kom ceev kom txo tau lub sijhawm ntawm cov pa nthuav dav hauv cov hlau; Thaum vuam tuab daim hlau, qhov vuam ceev tuaj yeem raug txo kom ntseeg tau tias qhov kev ua haujlwm ntawm vuam seam nyob rau hauv cov xwm txheej ntawm cov khoom preheating.
Ntxuav lub weld nto chemically los yog mechanically kom txo tau cov nyhuv impurities ntawm weld zoo.
Tswj kev siv cov shielding roj los yog flux kom txo tau oxidation thiab tus nqi ntawm cov roj tsim.
Thermal Cracking
Vim yog qhov kub thiab txias tsim thaum lub sij hawm vuam txheej txheem, qhov no tuaj yeem ua rau kev nthuav dav sai thiab kev cog lus ntawm txhuas thiab tsim cov ntsiab lus kev ntxhov siab. Yog hais tias lub sij hawm solidification ntawm lub vuam yog luv luv thiab cov ntsiab lus kev ntxhov siab tsis tso tawm, lawv tuaj yeem ua rau tawg ntawm aluminium thiab thermal tawg; Tsis tas li ntawd, oxidation thiab thermal tawg tuaj yeem tshwm sim tau yooj yim thaum lub vuam tsis muaj kev tiv thaiv zoo.
Txhawm rau zam qhov no, peb yuav tsum tswj cov cua sov thaum lub sijhawm vuam, preheat lub vuam kom txaus ua ntej vuam, thiab kho cov roj tiv thaiv.
Blackening ntawm weld seam
Blackening ntawm laser welded txhuas feem ntau yog tshwm sim los ntawm tsis txaus laser hwj chim, unfocused npaum li cas tsis kho raws li tus nqi, los yog puas laser lens. Nyob rau hauv cov ntaub ntawv no, lub zog laser tsis ncav cuag lub melting pib ntawm oxide txheej nyob rau saum npoo ntawm txhuas, ua rau cov txhuas sib tov nrog huab cua thiab impurities, uas ua rau blackening ntawm weld.
Txhawm rau kom tau txais vuam zoo thiab zoo nkauj, thaum lub sij hawm txhuas vuam txheej txheem, Mytronic qhia ua ntej, xaiv lub hwj chim thiab teeb tsa qhov tseeb ntawm defocus; thib ob, koj tuaj yeem tshawb xyuas seb lub lens tiv thaiv puas puas.
Bite ntug tsis fused
Thaum laser welding aluminium, tsis tu ncua, ntxhib thiab tsis sib xws weld txoj kev thiab tsis sib xws ripples yog ib qho tshwm sim. Cov laj thawj tseem ceeb yog qhov sib dhos loj dhau ntawm qhov vuam, laser chaw ua haujlwm, lub zog laser tsis txaus thiab ntau dhau defocus.
Ua ntej, peb tuaj yeem txo cov hauv paus tshem tawm ntawm welded workpiece; thib ob, peb tuaj yeem kho lub teeb pom kev laser los txiav txim qhov chaw qhov chaw raug; Tsis tas li ntawd, peb kuj tuaj yeem ua kom lub zog laser thiab kho qhov tsis pom tseeb ntawm qhov zoo ntawm qhov chaw ua haujlwm, kom ntseeg tau tias qhov zoo ntawm vuam tom qab melting ntawm txhuas.
Vim yog cov yam ntxwv tshwj xeeb ntawm txhuas, cov txheej txheem ntawm laser vuam kuj yuav ntsib lwm yam teeb meem. Ua ntej welding aluminium thiab aluminium alloys, peb yuav tsum tsis tsuas yog xav txog qhov ruaj khov ntawm cov vuam zoo, tab sis kuj zoo li cov nyhuv vuam. Nrog rau kev txhim kho ntawm laser technology thiab aluminium manufacturing technology, cov txheej txheem ntawm laser vuam aluminium kuj tau zoo heev, muab lub hauv paus ruaj khov rau tsim lub teeb yuag hlau structural Cheebtsam hauv tsheb, aerospace thiab lwm yam kev lag luam.
