Thaum lub sij hawm tsim cov txheej txheem ntawm cov roj teeb uas siv nyob rau hauv hluav taws xob tsheb, cov ntaub ntawv tooj liab yuav tsum tau welded ntawm high speeds thiab tsis spatter. Infrared lasers nrog wavelengths ze rau 1000 nm feem ntau yog siv, tab sis qhov no nthuav tawm ob qhov teeb meem tseem ceeb rau vuam cov ntaub ntawv tooj liab: qis zog nqus thiab cov txheej txheem tsis ruaj khov. Kev nqus ntawm infrared laser lub teeb los ntawm cov khoom siv tooj liab nce nrog qhov kub thiab txias. Thaum lub zog siab IR laser irradiates tooj liab nto, lub zog nqus tus nqi ntawm tooj liab nto dheev nce tom qab tsim cov qhov me me; cov qhov tsis ruaj khov thiab tawg yog yooj yim tsim. Nyob rau tib lub sijhawm, vim tias lub zog ntawm infrared laser yuav loj, nws yuav ua rau lub laser puas. Kev nqus ntawm xiav laser los ntawm cov khoom siv tooj liab yog li 60%, uas yog ntau npaum li cas ntawm IR laser. Qhov ua tau ntawm xiav diode lasers rau kev ua tooj liab tau raug tshaj tawm hauv qee cov ntaub ntawv. Blue lasers tuaj yeem vuam tooj liab foils lossis nplooj ntawv nrog kev ua haujlwm siab thiab zoo. Txawm li cas los xij, tus nqi ntawm cov lasers xiav yog ntau dua li ntawm NIR lasers thiab qhov siab tshaj plaws tso zis hluav taws xob yog txwv rau 2000 W. Kev sib txuas cov teeb meem ntawm qis IR laser lub zog nqus, cov txheej txheem tsis ruaj khov thiab cov khoom siv hluav taws xob tsawg ntawm xiav laser, peb tuaj yeem tawm tswv yim. xiav-IR puas laser vuam txheej txheem. Nyob rau hauv cov txheej txheem vuam no, peb tuaj yeem ua ntej yaj qhov saum npoo ntawm cov khoom siv nrog lub laser xiav nrog kev nqus siab, thiab tom qab ntawd ua kom qhov tob ntawm lub pas dej molten nrog lub infrared laser.Yang li al. tshawb xyuas qhov ze-blue-infrared composite laser vuam ntawm 3 hli-tuab phaj raws li kev sim thiab cov lej simulations; ua ntej, lub phaj tooj liab tau rhuab nrog lub tshuab hluav taws xob qis qis, thiab tom qab ntawd lub zog hluav taws xob infrared laser irradiated lub siab kub ntawm lub phaj los tsim ib lub qhov tob me me.Fujio li al. tsim ib lub xiav-infrared laser composite welding system thiab pom tias vuam efficiency ntawm lub hybrid laser yog 1.45 lub sij hawm siab tshaj ntawm cov infrared laser.Kaneko li al. siv lub coaxial composite xiav-infrared laser kom loj lub pas dej ua ke thiab qhov me me thiab stabilize lub thermal convection sab hauv. Hauv kev sib xyaw xiav-infrared laser vuam, qhov nqus ntawm lub zog laser cuam tshuam tsis yog tsuas yog kev ruaj ntseg ntawm cov txheej txheem vuam, tab sis kuj yog kev pabcuam lub neej ntawm cov khoom siv. Yog tias qhov kub ntawm qhov tooj liab qhov chaw qis qis tom qab raug lub laser xiav, lub zog IR laser pom los ntawm cov tooj liab saum npoo yog siab, uas tuaj yeem ua rau lub taub hau laser puas.
Fujio, S. et al. tsim ib lub tshuab laser sib xyaw siv xiav semiconductor laser ua qhov preheating qhov chaw thiab ib hom fiber ntau laser raws li qhov chaw vuam. Kev ntsuas vuam tau ua tiav ntawm 2.5 × 3.0 × 50 hli tooj liab xaim siv lub tshuab laser sib xyaw. Fig. 1 qhia txog qhov melting thiab solidification kinetics ntawm ntshiab tooj liab ntes nrog lub koob yees duab siab ceev ntawm 0.1, 0.2, thiab 0.3 s hauv qab (a) lub laser sib xyaw thiab (b) ib hom fiber ntau laser. Rau ib hom fiber ntau laser nrog lub zog tso zis ntawm 1 kW, melting ntawm tooj liab pib ntawm li 0.3 s. Lub melting kinetics ntawm ib hom fiber ntau laser yog qhia nyob rau hauv daim duab 2.1.2. Ntawm qhov tod tes, rau ib lub laser hybrid nrog ib hom fiber ntau laser nrog lub zog tso zis ntawm 1 kW thiab xiav diode laser nrog lub zog tso zis ntawm 200 W, lub melting ntawm tooj liab pib ntawm 0.2 vib nas this. Yog li ntawd, raws li qhia nyob rau hauv daim duab 2, lub melting ntim ntawm tooj liab ua loj nyob rau hauv lub hybrid laser tshaj nyob rau hauv ib hom fiber ntau laser.
Vim yog preheating nrog xiav diode laser, qhov kub ntawm tooj liab nce mus txog 800 degree . Qhov kub ntawm cov tooj liab nce mus txog 1.5 ° F (0.5 ° F). Qhov nce hauv qhov kub thiab txias ua rau lub zos nce hauv qhov muag pom ntawm tooj liab rau hauv fiber ntau laser. Nyob rau tib lub sij hawm lub composite laser tau ib tug loj tooj liab melting ntim tshaj ib hom fiber ntau laser. Yog li ntawd, nws tau xaus lus tias los ntawm preheating ntawm xiav diode laser, lub teeb nqus ntawm tooj liab mus rau ib hom fiber ntau laser yog nce thiab vuam efficiency yog txhim kho.
Wu et al. tsim ib lub teeb xiav xiav-infrared laser tshav kub qhov qauv qauv rau cov khoom siv tooj liab nrog lub thickness ntawm 0.5 hli los ntawm kev siv coaxial composite xiav lub teeb-infrared laser vuam txheej txheem, thiab lej simulated tus cwj pwm dynamic ntawm lub pas dej ua ke molten thiab laser zog nqus los ntawm kev sib txuas nrog lub virtual mesh refinement txoj kev. Piv nrog rau xiav laser vuam, qhov siab tshaj plaws melting kub thiab tshaj tawm ntawm coaxial composite xiav-IR laser vuam fluctuate ntau, thiab tag nrho cov laser zog efficiency yog tsawg, tab sis zoo welds tseem yuav tau. Piv nrog infrared laser vuam, nyob rau hauv coaxial composite xiav-IR laser vuam, lub xiav laser txhim kho thiab stabilized lub zog efficiency ntawm lub infrared laser.
Kev simulation tshiab nrog {{{{10}}}}} W ntawm xiav laser zog, 1400 W ntawm IR laser zog, thiab vuam ceev ntawm 1.2 m / min tau rov pib dua los ntawm coaxial composite xiav-IR laser vuam rooj plaub ntawm t=0.1 s. Qhov kev simulation tshiab tau qhia hauv daim duab 3(a). Raws li pom nyob rau hauv daim duab 3(a), tsuas yog ib lub pas dej me me molten nkaus xwb. Qhov siab tshaj plaws melting kub yog 1798 K thiab qhov siab tshaj plaws melting ceev yog 0.11 m / s. Raws li pom nyob rau hauv daim duab 3(b), lub absorbed IR laser zog thiab efficiency yog 190.4 W thiab 13.60%, feem, tom qab t=0.232 s. Lub zog IR laser thiab kev ua haujlwm ntawm cov khoom siv welded kuj pom nyob rau hauv daim duab 3(c). Piv nrog rau IR laser vuam, IR laser zog efficiency ntawm coaxial puas xiav-IR laser vuam tau nce 16.99%, thiab tag nrho laser zog efficiency tau nce los ntawm 165.22%. Raws li qhia hauv daim duab 3(c), tus qauv sib txawv ntawm IR laser efficiencies nyob rau hauv coaxial composite xiav lub teeb-IR laser vuam thiab IR laser vuam yog 0.014% thiab 0.215%, feem. Nws tuaj yeem xaus lus tias xiav laser txhim kho thiab stabilizes lub zog efficiency ntawm infrared laser nyob rau hauv composite xiav-IR laser vuam.
Nyob rau hauv kev saib ntawm tus nqi raws li qhov siab tshaj plaws lub zog txwv ntawm lub teeb xiav thiab qhov tsis zoo ntawm lub infrared laser qhov tsis muaj zog nqus thiab cov txheej txheem tsis ruaj khov, ib qho kev sib xyaw xiav-liab laser vuam txheej txheem tau thov. Los ntawm preheating cov khoom siv nrog lub siab nqus ntawm lub teeb xiav, yog li ua tiav qhov kev nqus ntawm lub teeb liab, thiab tib lub sijhawm, vim lub zog me me ntawm lub teeb xiav piv rau fiber ntau laser, nws muaj peev xwm paub tau. Kev sib xyaw ua ke ntawm cov khoom siv hluav taws xob ruaj khov thiab sib sib zog nqus welding kom ua tiav cov vuam zoo ntawm cov hlau tiv thaiv corrosion (Aluminum, tooj liab).
