Cov xaiv vuam txheej txheem thiab cov txheej txheem hauv cov txheej txheem tsim hluav taws xob cov roj teeb hluav taws xob ncaj qha cuam tshuam tus nqi, zoo, kev nyab xeeb, thiab cov roj teeb sib xws li qub.
1 Txujci ntawm laser vuam
Laser welding yog siv cov kev qhia zoo tshaj plaws thiab lub zog siab ntawm cov kab teeb laser mus ua haujlwm. Lub nqaj laser tau tsom rau hauv thaj chaw me me los ntawm kev kho qhov muag. Nyob rau lub sijhawm luv luv, thaj chaw muaj cua sov nrog qhov kev siv hluav taws xob siab yog tsim nyob rau ntawm qhov chaw welded, kom lub nruas welded yog melted thiab cov khoom sib txuas qhov txuas thiab cov weld yog tsim.
2 Hom ntawm laser welding
Laser tshav kub conduction vuam, cov kab hluav taws xob laser melts nplaim qhov chaw ua haujlwm raws txoj leeg, thiab cov khoom siv hlau ua kom sib xyaw thiab sib zog ua rau daim ntawv txuas. Nws yog tsuas yog siv rau cov ntaub ntawv nyias. Qhov siab tshaj plaws vuam qhov tob ntawm cov khoom siv yog tsim los ntawm nws cov thermal conductivity, thiab qhov weld dav yog ib txwm ntau dua li qhov vuam tob.
Kev sib sib zog nqus nqus vuam sib txuas, thaum lub tshuab hluav taws xob high-power laser sib sau ua ke rau saum npoo ntawm cov hlau, lub tshav kub tsis tuaj yeem ploj, thiab lub vuam qhov tob yuav tob ntxiv. Lub vuam thev naus laus zis yog lub tshuab nqus hlau tau zoo. Vim tias qhov kev ua haujlwm siab nrawm, qhov kub me me cuam tshuam rau thaj chaw, thiab kev sib cais yam tsawg kawg, kev siv lub tshuab nqus hlau sib sib zog nqus tuaj yeem siv rau kev nqus hlau lossis vuam vuam ntau txheej ntawm cov ntaub ntawv ua ke.
Lub ntsiab sib txawv ntawm cov kub conduction vuam thiab sib sib zog nqus vuam yog lub zog ntom ntom thov rau cov hlau saum npoo hauv lub sijhawm ua haujlwm, thiab tus nqi tseem ceeb yog txawv rau cov hlau sib txawv.
Kev sib txuas ntawm cov vuam thiab cov vuam txuas
Los ntawm kev vuam, qhov txuas txuas tsis tas yuav xuas nrig ntaus, thiab kev coj ua yog yooj yim. Lub siab-fais fab laser welder xav tau rau kev nkag mus vuam. Qhov kev nkag mus tob ntawm kev nkag mus rau ntawm cov vuam qis yog qis dua qhov ntawm lub vuam seam, thiab kev ntseeg tau tus kheej kuj tsis zoo.
Piv nrog kev sib txaws vuam, vuam sib tsoo tsuas xav tau hluav taws xob muaj zog me dua. Kev nkag mus ntawm seam seam yog siab dua li ntawm kev nkag mus rau welding, thiab kev ntseeg tau kuj zoo. Tab sis qhov txuas txuas yuav tsum tau punched, yog li nws yog qhov nyuaj rau txheej txheem.
Pulsed welding thiab txuas txuas tas mus li
1) Mem tes hom vuam
Thaum laser vuam, tsim nyog vuam viav vias yuav tsum raug xaiv. Cov kab ke siv dag zog nquag yog lub voos plaub fab, ncov voom, bimodal yoj, thiab lwm yam. Qhov kev cuam tshuam ntawm aluminium alloy nto mus rau lub teeb dhau heev. Thaum lub tshuab hluav taws xob siab siv laser nqaj zuj zus cov khoom nto, 60% - 98% ntawm lub zog laser ntawm lub ntsej muag hlau yuav ploj vim yog qhov xav txog, thiab qhov cuam tshuam hloov nrog qhov kub. Feem ntau, thaum vuam aluminium alloy, qhov zoo tshaj plaws xaiv yog yoj ntse thiab bimodal yoj. Qhov no vuam waveform muaj qhov ntev dua mem tes ntawm qhov qis, uas tuaj yeem txo lub cim ntawm qhov hws thiab tawg.
Pulsed laser vuam qauv
Vim tias qhov cuam tshuam loj ntawm aluminium alloy rau laser, txhawm rau tiv thaiv lub laser nqaj los ntawm kev ua rau txoj kev rov qab ntsug thiab ua rau lub teeb tsom ntawm laser, lub vuam sib koom ua ke feem ntau deflected ntawm qee lub kaum sab xis hauv cov txheej txheem welding. Txoj kab uas hla ntawm pob qij thiab ua kom muaj kev sib txuam zoo nce ntxiv nrog qhov nce ntawm laser inclination kaum. Thaum lub laser inclination lub kaum sab xis yog 40 degrees, qhov siab tshaj plaws ua rau cov leeg sib koom tes thiab qhov kev sib koom ua ke zoo tau txais. Lub weld nkag mus thiab kev txau zoo txo qis nrog lub kaum sab xis laser inclination. Thaum lub kaum sab xis laser inclination siab tshaj 60 degrees, qhov kev nkag siab zoo weld txo qis rau xoom. Yog li ntawd, lub weld nkag mus thiab dav yuav tau nce ntxiv los ntawm tilting qhov sib koom tes welded mus rau qee lub kaum sab xis.
Tsis tas li ntawd, thaum ua vuam, noj lub weld raws li tus ciam, qhov chaw laser yuav tsum tau welded los ntawm 65% ntawm lub hau npog thiab 35% ntawm lub plhaub, uas tuaj yeem txo qhov tawg los ntawm lub hau kaw teeb meem.
2) Nruam hom vuam
Vim tias cov txheej txheem cua kub ntawm kev ua haujlwm txuas mus tas li ntawm laser vuam tsis zoo li cia li txias thiab cua sov ntawm lub tshuab mem tes, qhov sib tsoo tawg tsis yooj yim pom tseeb thaum lub sijhawm vuam. Txhawm rau txhawm rau txhim kho qhov zoo ntawm qhov txuas, txuas nruam laser vuam yog saws. Qhov chaw weld yog du thiab tsis muaj teeb meem, tsis muaj txaws thiab qhov tsis xws luag, thiab tsis muaj qhov tawg nyob sab hauv ntawm lub weld. Hauv kev siv vuam vias txhuas txhuas, qhov zoo ntawm nruam laser yog pom tseeb. Piv nrog rau kev siv vuam txheej txheem, kev txuas ntxiv mus rau laser muaj qhov ntau lawm ntau lawm thiab tsis muaj qhov xaim; piv nrog mem tes laser vuam, nws tuaj yeem daws qhov tsis xws luag tom qab vuam, xws li cov kab nrib pleb, qhov hws, qhov tawg, thiab lwm yam, kom ntseeg tau tias aluminium alloy muaj cov cuab yeej zoo tom qab vuam; nws yuav tsis sag tom qab welding, thiab tus nqi ntawm polishing tom qab vuam raug txo, uas txuag cov nqi ntawm ntau lawm, Txawm li cas los xij, vim hais tias cov nqaij ntawd ntawm CW laser muaj tsawg, qhov sib dhos qhov tseeb ntawm qhov chaw ua haujlwm yuav tsum siab dua.
Nruam laser vuam qauv
Hauv vuam ntawm cov roj teeb hluav taws xob, cov vuam siv tshuab yuav xaiv qhov tsim nyog laser thiab vuam vuam raws li cov neeg siv khoom' s roj teeb cov khoom, cov qauv, tuab, lub zog tensile yuav tsum tau, suav nrog vuam ceev, vuam vias, cov txiaj ntsig siab, vuam lub taub hau qaij. lub kaum ntse ntse, thiab lwm yam kom teeb tsa qhov tsim nyog vuam siv, thiaj li ua kom paub tseeb tias qhov kawg vuam nyhuv ua tau raws li qhov yuav tsum tau ua ntawm cov roj teeb hluav taws xob.
3 Cov txiaj ntsig ntawm laser welding
Nws muaj qhov zoo ntawm cov khoom siv hluav taws xob muaj zog, kev ua haujlwm siab vuam ntau dua, siab machining qhov tseeb, thiab qhov loj qhov loj qhov sib piv ntawm cov hlau txuas. Lub nqaj laser yog qhov yooj yim kom pom kev, sib dhos, thiab coj kev los ntawm cov khoom siv kho qhov muag. Nws tuaj yeem tso rau qhov kev ncua deb ntawm qhov chaw ua haujlwm thiab tuaj yeem rov kho dua tshiab ntawm cov clamps lossis cov teeb meem nyob ib ncig ntawm qhov chaw ua haujlwm. Lwm cov cai vuam tsis tuaj yeem ua si vim cov chaw txwv saum toj no.
Lub vuam lub zog tuaj yeem tswj tau kom raug, lub vuam nyhuv yog ruaj khov thiab lub vuam zoo li zoo;
Cov kev sib chwv tsis sib kis, kev xaib fiber ntau, kev siv mus tau zoo, kev kawm siab ntawm kev siv lub tshuab. Thaum vuam vias cov khoom nyias nyias lossis cov khoom siv hlau zoo, yuav tsis muaj teeb meem kev nco qab zoo li arc vuam. Vim tias lub xov tooj ntawm lub zog siv hluav taws xob roj ua raws cov ntsiab cai ntawm" hnav" ;, nws feem ntau yog ua los ntawm" lub teeb ci" txhuas thiab xav tau" thinner" ;. Feem ntau, lub plhaub, cov npog, thiab cov hauv qab yog qhov yuav tsum tsawg dua 1.0 hli. Tam sim no, cov khoom siv yooj yim tuab ntawm cov tuam txhab loj yog li ntawm 0.8 hli.
Nws tuaj yeem muab cov tshuab muaj zog siab rau ntau cov khoom sib txuas ua ke, tshwj xeeb tshaj yog siv hlau txuas ntawm cov khoom siv tooj liab thiab cov khoom siv txhuas. Qhov no tseem yog lub thev naus laus zis nkaus xwb uas tuaj yeem muab weld nickel plating rau cov khoom siv tooj liab.
4 Cov kev nyuaj ntawm laser vuam
Tam sim no, aluminium alloy roj teeb plhaub tso nyiaj rau ntau dua 90% ntawm cov roj teeb tag nrho. Qhov nyuaj ntawm vuam yog qhov cuam tshuam ntawm aluminium alloy mus rau lub laser yog qhov siab heev, thiab qhov rhiab heev ntawm porosity yog siab nyob rau hauv txoj kev vuam. Qee qhov teeb meem thiab qhov tsis xws luag yuav tshwm sim nyob rau hauv txheej txheem vuam, qhov tseem ceeb tshaj plaws uas yog porosity, kub tawg, thiab tawg.
Muaj ob lub ntsiab ntawm porosity hauv laser vuam ntawm aluminium alloy: hydrogen porosity thiab porosity tshwm sim los ntawm npuas tawg. Vim hais tias qhov txias txias ntawm qhov laser vuam tau nrawm heev, qhov teeb meem ntawm hydrogen porosity yog qhov hnyav dua, thiab tseem muaj qhov zoo vim qhov vau ntawm qhov me me hauv laser vuam.
Thaum tshav kub kub cracksproblem. Aluminium alloy yog ib qho tshwj xeeb eutectic alloy, uas nquag sib tsoo kub thaum lub sijhawm vuam, nrog rau cov hlau sib tsoo tawg thiab HAZ liquefaction tawg. Vim muaj pes tsawg leeg sib cais hauv qhov chaw weld, eutectic segregation yuav tshwm sim thiab lis ciam ciam teb yaj yuav tshwm sim. Raws li kev ua ntawm qhov kev ntxhov siab, liquefaction cov nplawm tawg yuav ua rau ntawm thaj tsam lis, uas yuav txo qhov ua tau zoo ntawm qhov txuas ua ke.
Kev tawg (tseem hu ua txaws) teeb meem. Muaj ntau yam ua rau muaj kev tawg, xws li kev nyiam huv ntawm cov khoom, huv huv ntawm cov khoom nws tus kheej, cov yam ntxwv ntawm cov khoom siv nws tus kheej, thiab lwm yam, thiab kev ruaj khov ntawm lub laser ua lub luag haujlwm uas txiav txim siab. Qhov saum npoo ntawm lub plhaub yog convex, qhov cua qhov cua, thiab lub tshuab huab cua sab hauv. Lub ntsiab yog vim li cas cov fiber ntxhais lub cheeb yog qhov loj heev los yog lub laser lub zog tau teeb dhau dhau. Nws tsis yog" zoo dua nqaj zoo, zoo dua vuam nyhuv" tshaj tawm los ntawm qee cov khoom siv cov cuab yeej siv laser. Lub nqaj zoo tau zoo yog tsim nyog rau kev muab cov vuam txuas nrog kev nkag mus loj. Tus yuam sij rau kev daws teeb meem yog nrhiav qhov txheej txheem uas nyob tsis raug.
Lwm yam nyuaj
Rau lub vuam ntawm muag qhwv polar lug, vuam tooling yog qhov yuav tsum tau heev, yog li ntawd cov ncov qaumteb qabteb khi yuav tsum khov kho kom ntseeg tau qhov vuam kev sib txawv. Nws tuaj yeem paub cov kev ua haujlwm siab ntawm viav vias ntawm S-puab, daim duab kauv, thiab lwm cov kev sib tw uas nyuaj, nce qhov chaw txuas ua ke thiab ntxiv dag zog vuam kev tib lub sijhawm.
Lub vuam ntawm cov kab hluav taws xob cylindrical yog siv rau lub vuam ntawm cov electrodes zoo. Vim tias lub plhaub ntawm qhov hluav taws xob tsis zoo yog nyias, nws yog qhov yooj yim heev rau weld los ntawm. Piv txwv li, tam sim no, qee cov tuam ntxhab siv txoj kev tsis zoo electrode vuam dawb cov txheej txheem, thiab qhov zoo electrode yog laser vuam.
Thaum cov roj teeb square ua ke yog welded, tus ncej lossis cov khoom sib txuas muaj kuab hnyav; thaum cov thooj txuas txuas yog welded, cov kuab paug pov tseg, uas yog yooj yim rau daim ntawv vuam tawg cov ntsiab lus thiab ua rau lub qhov; thaum tus ncej yog nyias thiab muaj cov yas lossis tej hub ntu hauv qab nws, nws yooj yim rau weld los ntawm. Thaum tus ncej yog me me, nws yooj yim rau kev cuam tshuam ntawm cov yas thiab hlawv tawm. Tsis txhob siv txuas ntau-txheej, muaj pores nruab nrab ntawm txheej, nws tsis yooj yim rau weld.
Cov txheej txheem vuam tseem ceeb tshaj plaws ntawm cov roj teeb square yog cov ntim ntawm lub plhaub npog, tuaj yeem muab faib ua vuam daim npog sab saum toj thiab hauv qab npog raws li txoj haujlwm sib txawv. Vim tias lub me me ntawm lub roj teeb, qee lub roj teeb ua lag luam siv" sib sib zog nqus teeb duab" cov txheej txheem los tsim cov roj teeb plhaub, tsuas yog xav tau weld lub hau sab saum toj.
Sab vuam qauv ntawm cov square fais fab roj teeb
Txoj kev vuam ntawm cov roj teeb square feem ntau muab faib ua ib sab vuam thiab vuam sab saum toj. Qhov zoo tseem ceeb ntawm lub vuam tso sab nraud yog tias nws muaj tsawg dua ntawm sab hauv ntawm lub cell, thiab lub spatter yuav tsis yooj yim nkag mus rau sab hauv lub plhaub. Vim tias lub vuam yuav ua rau cov thim tawm, uas yuav muaj kev cuam tshuam me ntsis ntawm cov txheej txheem tom qab ntawm kev sib dhos, yog li cov txheej txheem sab vuam muaj cov kev cai siab ntawm kev ruaj ntseg ntawm lub laser thiab kev huv ntawm cov khoom. Vim hais tias cov txheej txheem vuam sab saum toj yog welded rau ntawm ib sab, qhov yuav tsum tau ua rau vuam cov khoom siv sib xyaw ua ke yog tsawg, thiab kev tsim tawm ntau yog yooj yim. Txawm li cas los xij, muaj ob qhov tsis zoo: ib qho yog tias qhov tshwj xeeb me ntsis tuaj yeem nkag mus rau hauv lub cell thaum lub sijhawm vuam, thiab lwm qhov yog tias qhov xav tau siab rau ntu ntawm pem hauv ntej ntawm lub plhaub yuav ua rau muaj teeb meem nqi.
5. Qhov cuam tshuam rau vuam zoo
Laser welding yog txoj kev tseem ceeb ntawm kev ua haujlwm siab-siab roj teeb vuam. Laser welding yog txheej txheem ntawm lub siab-siab nqaj laser tsis muaj kev cuam tshuam ntawm qhov chaw ua haujlwm, uas ua rau kev ua haujlwm kub kom nce siab, thiab qhov haujlwm ntawm lub ntsej muag ploj thiab rov ua dua los ua qhov txuas mus tas li. Lub shear lub zog thiab kua muag tsis kam ntawm laser vuam zoo dua. Lub tshuab hluav taws xob muaj zog, lub zog, huab cua nruj, hlau tsis kam, thiab kev txhim kho corrosion ntawm roj teeb vuam yog cov vuam kev ua tau zoo ntsuas kev ntsuas.
Muaj ntau ntau yam uas cuam tshuam rau qhov zoo ntawm laser vuam. Ib txhia ntawm lawv yog heev volatile thiab muaj txiav txim siab tsis txaus ntseeg. Yuav ua li cas teeb tsa thiab tswj cov kev txwv no kom raug, thiaj li tuaj yeem tswj tau hauv qhov tsim nyog hauv cov txheej txheem kev kub ceev thiab txuas ntxiv mus kom paub tseeb tias cov hlau zoo. Qhov ntseeg tau thiab ruaj khov ntawm weld sib sau yog cov teeb meem tseem ceeb uas cuam tshuam txog kev siv tswv yim thiab kev tsim kho tshuab laser welding. Lub hauv paus tseem ceeb cuam tshuam rau qhov zoo ntawm laser vuam yog cov khoom siv vuam, khoom ua haujlwm, thiab cov txheej txheem kev ua haujlwm.
1) Laser vuam cov khoom
Fiber Laser Laser Tshuab rau fais fab roj teeb
Qhov RS-SWF-80/150 80W& 150W fiber ntau laser vuam tshuab tau raws li qhov kev thov rau qhov kev lag luam zoo high-speed laser welding rau lithium roj teeb hlwb.
Qhov tseem ceeb tshaj plaws zoo uas yuav tsum tau ntawm laser yog nqaj hom, tso zis ntau lawm, thiab kev ruaj khov. Beam hom yog qhov ntsuas tseem ceeb ntawm nqaj zoo. Qhov qis dua qhov kev txiav txim ntawm nqaj hom, qhov zoo dua cov nqaj tsom qhov kev ua tau zoo, qhov chaw me dua, qhov siab zog hluav taws xob ntau dua, thiab qhov loj dua qhov weld qhov tob thiab dav hauv tib lub zog laser. Lub hauv paus hom (TEM00) lossis hom kev txiav txim siab tsawg yog feem ntau xav tau, txwv tsis pub, nws nyuaj rau kev ua kom tau raws li cov kev xav tau ntawm kev ua haujlwm siab laser vuam. Nyob rau tam sim no, nws yog qhov nyuaj rau cov lasers hauv tsev kom siv cov laser vuam siv ntawm qhov nqaj zoo thiab lub zog tsim hluav taws xob. Los ntawm cov xwm txheej txawv teb chaws, cov laser nqaj zoo thiab cov zis hluav taws xob ruaj khov tau zoo heev, uas yuav tsis ua teeb meem ntawm laser vuam. Lub teeb tsom xam yog qhov tseem ceeb tshaj plaws cuam tshuam rau kev ua haujlwm zoo hauv kev kho qhov muag. Qhov ntev focal ntev feem ntau ntawm 127 hli (5 hauv) thiab 200 hli (7.9 hauv). Ib qho me me focal ntev yog qhov zoo rau kev txo lub duav lub cheeb qhov ntev ntawm lub nqaj teem, tab sis lub focal ntev ntev me me yog yooj yim los ua paug thiab puas tsuaj los ntawm kev sib dhos hauv cov txheej txheem welding.
Lub luv luv luv nthwv dej yog, qhov siab dua ntawm absorptivity yog. Feem ntau, qhov cuam tshuam ntawm cov ntaub ntawv nrog kev coj zoo yog qhov siab heev. Rau YAG laser, qhov cuam tshuam ntawm cov nyiaj yog 96%, uas ntawm txhuas yog 92%, uas tooj liab yog 90%, thiab cov hlau muaj 60%. Qhov ntsuas kub ntau dua, qhov siab dua ntawm qhov nqus tau yog, qhia txoj kab sib txuas; feem ntau, phosphate, carbon xim dub, thiab graphite tuaj yeem txhim kho qhov kev nqus sai.
2) Cov mob ua haujlwm
Laser vuam yuav tsum tau ua tiav ntawm cov ntug ntawm qhov haujlwm, qhov sib dhos muaj qhov raug siab, thiab lub chaw nruj me ntsis txuas nrog lub weld. Ntxiv mus, qhov sib dhos thawj qhov tseeb thiab qhov teeb ntawm cov chaw ua haujlwm tsis tuaj yeem hloov vim lub vuam thermal deformation hauv cov txheej txheem welding. Qhov no yog vim tias lub laser qhov chaw me me thiab lub weld seam nqaim. Feem ntau, tsis muaj cov muab tub lim hlau ntxiv. Yog tias qhov sib dhos tsis nruj thiab qhov sib txawv yog qhov loj heev, lub nqaj tuaj yeem hla ntawm qhov sib txawv thiab tsis tuaj yeem yaj lub hauv paus hlau, lossis ua rau pom tseeb undercut thiab kev nyuaj siab. Yog tias qhov sib txawv ntawm qhov chaw ntawm qhov nqaws yog me me loj, nws yuav ua rau lub fusion tsis tiav lossis nkag mus tsis tiav. Yog li ntawd, qhov phaj dav dav sib dhos sib txawv thiab cov chaw sib khi sib txawv yuav tsum tsis txhob ntau dua 0.1 hli, misalignment yuav tsum tsis txhob siab tshaj 0.2 hli. Hauv kev tsim ntau, qee zaum laser vuam tshuab tsis tuaj yeem siv vim tias nws tsis tuaj yeem ua tau raws li cov cai no. Yuav kom tau txais cov vuam zoo, qhov tso cai tau txais qhov sib txawv thiab ceg tawv kis yuav tsum tau tswj nyob hauv 10% ntawm cov ntawv tuab.
Kev vam meej laser welding yuav tsum muaj kev sib txuam sib luag ntawm cov khoom nruab nrog kom tau welded. Qhov no yuav tsum ua tib zoo ua ntu ntawm cov ntu rau cov txiaj ntsig zoo. Qhov no yog qhov nyuaj rau qhov ua los ntawm cov khoom siv nyias ntawm lub nra, vim tias nws yog nquag ua khoov thiab misalignment, tshwj xeeb tshaj yog thaum lub nra raug teeb rau hauv lub roj teeb loj lossis cov qauv siv.
3) Laser tsis txuas
(1) Lub zog ntom ntawm laser chaw yog qhov tseem ceeb tshaj plaws cuam tshuam rau laser vuam hom thiab weld forming ruaj ntseg. Cov cawv ntawm laser pom lub zog ntom ntawm vuam hom thiab weld forming ruaj khov yog li hauv qab no: nrog lub laser pom lub zog hluav taws xob nce los ntawm me me rau loj, qhov kev txiav txim yog ruaj khov thermal conductivity vuam, hom tsis ruaj khov vuam, thiab ruaj khov sib sib zog nqus vuam.
Lub zog ntom ntom ntawm qhov chaw laser yog tshwj xeeb txiav txim siab los ntawm lub zog laser thiab cov nqaj tsom qhov chaw thaum lub nqaj hom thiab focal ntev yog tsau. Lub laser fais fab ntom ntom yog muaj sib npaug rau lub zog laser. Thaum ua kom pom tseeb ntawm cov nqaj yog nyob rau ntawm qee txoj haujlwm hauv qab ntawm qhov chaw ua haujlwm (1-2 hli, nyob ntawm qhov tuab thiab tsis sib luag), qhov kev pom zoo rau weld tuaj yeem tau txais. Sib txawv los ntawm qhov chaw ua kom pom tseeb, qhov teeb pom kev nyob rau saum npoo ntawm qhov chaw ua haujlwm yuav loj dua, ua rau lub zog ua kom me dua. Txog rau qee qhov ntau, nws yuav ua rau kev hloov vuam daim ntawv foos.
Tsuas yog thaum vuam tsoo ua haujlwm siab dhau, qhov ruaj khov sib sib zog nqus nqus txheej txheem tsis tuaj yeem tswj tau vim muaj cov cua sov nkag me. Qhov tseeb vuam, ruaj khov kev sib sib zog nqus vuam lossis ruaj khov thermal conduction vuam yuav tsum raug xaiv raws li qhov yuav tsum tau ua kom nkag mus ntawm weldment, thiab tsis ruaj khov vuam hom yuav tsum tau zam kiag li.
(2) Nyob rau hauv qhov ntau ntawm kev sib sib zog nqus vuam sib tsoo, lub zog ntawm vuam tsis sib haum ntawm qhov kev nkag tau: nyob rau hauv qhov ntau ntawm qhov tob tob ruaj khov vuam, qhov ntau dua ntawm lub zog laser, ntau dua qhov kev nkag mus, uas yog txog 0.7 zog; thiab qhov siab dua vuam ceev, qhov tob tob nkag mus. Ntawm qee qhov laser fais fab thiab vuam ceev, qhov kev nkag mus yog qhov loj tshaj thaum lub siab tsom rau ntawm txoj haujlwm zoo. Yog tias kev ua kom pom tseeb tau txav mus los ntawm txoj haujlwm no, qhov kev nkag qis poob qis thiab txawm tias yuav tsis ruaj khov vuam lossis ruaj khov thermal conduction vuam.
(3) Lub luag haujlwm tseem ceeb ntawm kev tiv thaiv roj yog tiv thaiv cov haujlwm tawm los ntawm kev tiv thaiv oxidation thaum vuam, los tiv thaiv lub tsom teeb tsom mus los ntawm cov pa hlau vapor paug thiab kua dej ntws tawm, ua rau cov ntshav tawg los ntawm cov muaj zog laser vuam, ua kom lub ntsej muag txias, thiab txo qis tshav kub cuam tshuam thaj chaw.
Argon lossis helium feem ntau yog siv los ua cov roj thaiv. Nitrogen tuaj yeem siv rau cov uas tsis muaj qhov ua tau zoo. Qhov zoo siab ntawm helium los ua cov ntshav txawv yog txawv: helium muaj ntau dua cov ionization ntim thiab sai dua cov kev sib tw thaum tshav kub kub. Raws li cov xwm txheej qub, cov roj muaj qhov sib zog me dua los tsim cov ntshav ntau dua li argon, yog li nws tuaj yeem tau txais qhov ua kom tob dua. Hauv qhov tseeb ntau, nrog qhov nce ntawm cov ndlwg ntawm cov roj tiv thaiv, qhov nyiam ntawm kev tsim cov ntshav nce ntxiv, yog li lub qhov siab yaj nce, tab sis nws zoo li ruaj khov thaum nws nce mus rau qee yam.
(4) Kev txheeb xyuas ntawm kev saib xyuas txhua yam: ntawm plaub lub vuam tsis sib haum, vuam ceev thiab thaiv cov pa roj tawm tau yooj yim los saib xyuas thiab kom ruaj khov, thaum lub zog laser thiab tsom qhov chaw yog qhov tsis xws luag thiab tsis yooj yim los saib xyuas hauv cov txheej txheem welding. Txawm hais tias lub zog laser tawm ntawm lub laser yog qhov ruaj khov thiab yooj yim los saib xyuas, vim qhov poob ntawm lub teeb qhia thiab kev ua kom pom tseeb, lub zog laser mus txog ntawm qhov chaw ua haujlwm yuav hloov, thiab qhov kev ploj no cuam tshuam rau qhov zoo ntawm cov haujlwm kho qhov muag, kev pabcuam lub sijhawm thiab cov pa phem saum npoo av, yog li nws tsis yooj yim los saib xyuas thiab dhau los ua qhov tsis muaj tseeb ntawm vuam zoo. Txoj kab teeb tsa tsom teeb yog ib qho nyuaj tshaj plaws los ntsuas thiab tswj, uas muaj lub zog cuam tshuam rau lub vuam zoo. Nyob rau tam sim no, nws yog qhov tsim nyog los txiav txim siab txoj haujlwm tsom kwm tsim nyog los ntawm phau ntawv hloov kho thiab ntsuas cov txheej txheem kev soj ntsuam txhawm rau kom tau txais qhov zoo tshaj plaws nkag. Tab sis nyob rau hauv txoj kev vuam, vim yog workpiece deformation, lub teeb thermal cuam tshuam, lossis ntau lub vuam ntawm qhov chaw nkhaus, qhov chaw tsom yuav hloov thiab tej zaum dhau qhov kev tso cai.
Rau ob qhov xwm txheej saum toj saud, ntawm ib sab, cov khoom lag luam zoo thiab lub siab ruaj ntseg kho qhov muag yuav tsum tau siv thiab tswj kev ua ntu zus kom tsis txhob muaj kuab paug thiab ua kom huv si; ntawm qhov tod tes, qhov kev soj ntsuam tiag tiag thiab kev tswj hwm ntawm cov txheej txheem laser vuam yuav tsum tau tsim kho kom zoo dua qhov ntsuas tsis pub dhau thiab saib xyuas lub vuam txheej txheem Nws tuaj yeem ua tiav qhov kev hloov ntawm lub zog laser thiab tsom mus rau txoj haujlwm ntawm qhov chaw ua haujlwm, paub kev tswj lub voj, thiab txhim kho kev ntseeg tau thiab ruaj khov ntawm laser vuam zoo.
Thaum kawg, nws yog ib qho tseem ceeb kom nco ntsoov tias laser welding yog txheej txheem melting. Qhov no txhais tau tias ob qho tib si substrates yaj thaum laser vuam. Cov txheej txheem no tau nrawm heev, yog li cov ntawv xa tawm hauv tshav kub yog tsawg. Tab sis vim tias nws yog cov txheej txheem melting, nws yog ib qho ua tau los ua brittle high resistance intermetallic compound thaum vuam cov khoom sib txawv. Kev sib xyaw ntawm txhuas thiab tooj liab yog yooj yim tshwj xeeb tshaj yog ua rau cov kev sib txuas. Cov tebchaw no tau ua pov thawj tias muaj qhov tsis zoo rau lub sijhawm luv luv hluav taws xob thiab lub cev ntev thiab kev sib raug zoo ntawm kev sib koom tes ntawm cov cuab yeej siv hluav taws xob. Cov cawv ntawm cov kev cuam tshuam no rau ntawm kev ua mus sij hawm ntev ntawm cov roj teeb lithium yog qhov tsis muaj tseeb.