Nrog kev hloov kho dua tshiab thiab kev txhim kho ntawm cov neeg siv khoom siv hluav taws xob xws li xov tooj ntawm tes, ntsiav tshuaj computers, thiab phau ntawv sau, ntau ntawm cov txheej txheem tshiab, cov ntaub ntawv tshiab, thiab cov kev teeb tsa tshiab tau raug thov. Allolo alloys muaj qhov zoo ntawm lub teeb yuag, lub zog siab, kev txhim kho corrosion, thiab cov qauv zoo. Nws yog dav siv hauv kev tsim cov txheej txheem ntawm ntau yam khoom siv hluav taws xob.
Ntawm no, ib qho kev sib piv yog tsim los ntawm cov kab hluav taws xob txuas mus tas li thiab cov vas nthiv lasers, uas tau siv dav hauv aluminium alloy cov qauv ntawm cov neeg siv khoom siv hluav taws xob.
1. Vuam cov tsis xws luag
Lub ntsiab cov teeb meem ntawm lub laser vuam ntawm aluminium alloy yog pores thiab tawg, uas yog qhov tshwj xeeb pom tseeb thaum lub caij mem tes laser vuam. Nws feem ntau ntseeg tias qhov hws hle uas tsim los ntawm laser vuam ntawm alloys feem ntau yog tshwm sim los ntawm kev nqus ntawm hydrogen pores thiab cov khoom ua kom tsis muaj roj tsawg-kub ntxig nrog cov khoom ua. Aluminium alloy muaj qhov loj ntawm kev nthuav dav coefficient thiab siab vuam kev cuam tshuam. Nws yog eutectic alloy thiab yog qhov nquag rau thermal tawg. Tshwj xeeb tshaj yog nyob rau hauv laser pulse spot welding, lub sijhawm ua haujlwm ntawm ib tus mem tes yog luv, lub voj voog thermal nrawm nrawm dua, thiab qhov tawg feem ntau yog qhov zoo. Thaum cov fiber ntau laser siv rau kev nruam ntsaws vuam ntawm aluminium alloy, lub sijhawm ntawm lub pas dej molten yog lub caij nyoog ntev, uas txhim kho lub vuam kev ntxhov siab thiab lub siab ntawm qis melting point tshuaj rau ntawm vuam kab, thiab zoo heev txo qhov nyiam ntawm kev tawg nyob rau hauv vuam txheej txheem. Nyob rau tib lub sijhawm, txuas ntxiv ntawm qhov muaj nyob ntawm lub sijhawm ntawm lub pas dej molten tseem yog qhov zoo rau kev tso tawm cov roj hauv lub pas dej molten thiab txo qhov tsim ntawm vuam pores.
2. Lub zog thiab ruaj khov
Cov vuam tsoo tawg yuav txo qhov muaj zog ntawm qhov txuas cov pob txha txuas, muaj qhov cuam tshuam loj ntawm kev coj ua thiab kev ntseeg tau ntawm cov khoom, thiab yog ib qho ntawm cov kev phom sij vuam tsis zoo tshaj plaws. Fiber laser nruam vuam txheej txheem rau vuam aluminium alloy tuaj yeem zam qhov vuam tsoo thiab ua tau zoo txhim kho lub zog thiab ruaj khov ntawm qhov txuas.
Lub vuam vuam ntawm fiber ntau laser thiab mem tes laser vuam tib lub txhuas aluminium khoom yog sib piv. Tom qab kev suav, qhov nruab nrab rub lub zog ntawm cov fiber ntau laser yog 3.9 npaug ntawm cov laser pulsed, thiab cov qauv sib txawv ntawm cov rub lub zog cov ntaub ntawv tsuas yog 1/3 ntawm qhov ntawd ntawm lub laser pulsed. Kev tsom xam ntawm qhov sib xyaw ua ke pom tau hais tias qhov dav ntawm qhov txuas ntawm qhov sib txuas ntawm cov kab hluav taws xob fiber ntau me dua li ntawm qhov chaw muaj cov nplaim hluav taws xob, tab sis lub zog tensile tuaj yeem ncav cuag ze li 4 npaug ntawm cov laser pulsed. Qhov no yog vim tias: (1) Cov roj carbon fiber weld nyob rau hauv cov lus qhia ntev tseem muaj qhov txuas ntxiv rau saum toj no, thiab qhov tseeb qhov ua tau zoo ntawm thaj chaw tsis yog me dua li ntawm cov mem tes solder sib koom tes; (2) Lub vuam kab teeb meem xws li lub qhov hws thiab cov kab nrib pleev hauv cov mem tes solder sib koom tes ua rau nws lub zog vuam ua tau qis dua qhov muaj zog ntawm cov khoom siv dag zog, thaum lub zog ntawm cov khoom siv fiber ntau laser weld.
3. Vuam deformation
Aluminium alloy muaj cov kab sib txuas loj dua thiab yog qhov cuam tshuam ntawm welding deformation. CW fiber ntau laser muaj qhov zoo tshaj qhov nqaj zoo, qhov pom me me, ntau lub zog ntau dua, kev nrawm nrawm dua thiab ua kom muaj cua sov me dua, yog li cov khoom deformation me dua li cov tsoos CW laser. Tib lub sijhawm, lub zog ntawm fiber ntau laser vuam aluminium alloy IT tivthaiv cov khoom lag luam muaj ntau dua li ntawm cov mem tes laser.
4. Khoom muag qhov tshwm sim
IT tivthaiv cov khoom lag luam muaj qhov yuav tsum tau muaj ntau dua rau cov ntsej muag, thiab cov khoom siv aluminium alloy cuam tshuam los ntawm kev sib cais, kev ua haujlwm saum npoo, txheej txheej oxide, thiab lwm yam, uas ua rau muaj qhov ua rau laser tsis haum ntawm qhov chaw ua haujlwm. Qhov tshwm sim no muaj kev cuam tshuam ntau dua rau laser pulse spot welding. Thaum siv pulsed laser spot vuam, teeb meem xws li tsis tuaj yeem, tawg, pa taws thiab hmoov av yog tshwm sim, uas cuam tshuam rau cov tsos thiab kev ua haujlwm ntawm cov khoom, thiab yuav tsum tau ntxuav ob zaug. Thaum cov fiber ntau laser txuas ntxiv txuas cov txhuas hlau ntau, cov txheej txheem welding yog qhov ruaj khov dua, nws tsis yooj yim los ua cov txaws thiab pa taws, thiab nws tsis tas yuav ntxuav ob zaug. Nws zoo dua li cov mem tes laser nyob rau hauv tsos thiab txheej txheem.
Hauv kev xaus:
(1) Kev siv fiber ntau laser rau kev nruam txuas welding ntawm aluminium alloy cov khoom tuaj yeem zam qhov tsis xws luag xws li vuam tsoo thiab qhov hws uas feem ntau tshwm sim hauv mem tes laser chaw vuam, thiab zoo heev txhim kho lub vuam lub zog thiab ruaj khov.
(2) Los txhim kho lub vuam tsis ua haujlwm ntawm cov hluav taws xob fiber ntau, vuam kev cuam tshuam vuam tuaj yeem txo qis thiab kev tsim khoom ua tau zoo dua.
(3) Thaum nruam cov fiber ntau laser vuam aluminium alloy Cheebtsam, lub vuam txuas yog du thiab zoo nkauj, thiab nws tsis yooj yim los tsim txaws, haus luam yeeb, thiab lwm yam.
