Ua ib lub cuab yeej ua haujlwm siab heev, laser ua lub luag haujlwm tseem ceeb hauv kev vuam kev lag luam. Txawm hais tias cov cuab yeej siv laser vuam ib txwm muaj peev xwm tswj tau cov teeb meem no rau qee qhov, nws cov nyhuv feem ntau raug txwv los ntawm cov txheej txheem vuam ruaj khov thiab cov txheej txheem. Nyob rau hauv xyoo tas los no, qhov tshwm sim ntawm laser viav vias vuam thev naus laus zis muab ib qho kev daws teeb meem tshiab rau kev tswj hwm cov teeb meem vuam. Los ntawm kev qhia txog kev viav vias ntawm lub teeb laser thaum lub sijhawm vuam, cov thev naus laus zis tuaj yeem txhim kho cov yam ntxwv ntawm lub pas dej vuam, yog li ua kom zoo dua qhov zoo ntawm vuam. Laser viav vias vuam thev naus laus zis feem ntau yog raws li kev tswj hwm qhov tseeb ntawm lub teeb laser thiab viav vias thev naus laus zis kom ua tiav kev vuam zoo thiab zoo.
Txhim kho qhov tsos:
Thaum lub sijhawmtxheej txheem vuam, lub teeb laser raug tig sai thiab meej kom npog tag nrho thaj chaw vuam. Thaum lub teeb txav mus raws qhov kev taw qhia ntawm qhov vuam, nws oscillates hauv ntau daim ntawv, xws li lub voj voog, daim duab 8 thiab helix. Chen et al. siv lub tshuab laser swing los vuam cov hlau txhuas sib txawv, thiab piv nrog tsis muaj lub tshuab laser vuam, lub ntsej muag pem hauv ntej thiab nraub qaum ntawm lub tshuab laser vuam tau zoo dua. Tsis tas li ntawd, transverse swing laser vuam yog siv los ua kom muaj kev hloov pauv ntawm qhov zawj. Ntawm qee qhov kev sib txuas conductive, nws yog qhov tsim nyog los nthuav dav thaj chaw overcurrent, nws kuj tseem tsim nyog los nthuav dav qhov chaw sib txuas hlau, thiab nws kuj tseem tsim nyog los viav vias lub tshuab laser vuam kom ua rau qhov chaw sib txuas hlau ua "U".
1. (a) thiab (b) cov ntaub ntawv ntawm qhov sib txuas ntawm qhov vuam thiab qhov loj ntawm qhov vuam nyob rau hauv ntau hom kev sib hloov; (c) Kev tsim ntawm qhov saum npoo ntawm qhov vuam nyob rau hauv ntau hom kev sib hloov.
Txhim kho qhov tsis zoo ntawm phab ntsa sab sib txuas:
Qhov tsis zoo ntawm phab ntsa sab tsis sib xyaw ua ke yooj yim tshwm sim hauv cov laser vuam qhov sib txawv nqaim ib txwm muaj ntawm cov phaj nruab nrab tuab, uas yog tshwm sim los ntawm kev faib tsis sib xws ntawm lub zog laser hauv qhov ncauj, qhov nkag cua sov hauv nruab nrab ntawm qhov zawj yog loj, thiab qhov nkag cua sov hauv phab ntsa sab ntawm qhov zawj yog me me, uas tsis tuaj yeem tsim kev sib xyaw zoo. Qhov ntsuas tseem ceeb los daws qhov tsis zoo ntawm phab ntsa sab tsis sib xyaw yog kom nce qhov nkag cua sov rau phab ntsa sab. Hauv cov txheej txheem ntawm kev vuam laser, kev faib hluav taws xob tsim nyog dua ntawm lub teeb laser ntawm qhov chaw ua haujlwm tuaj yeem paub los ntawm kev viav vias ntawm lub teeb. Thaum qhov dav ntawm qhov zawj hloov pauv, qhov loj ntawm lub viav vias ntawm lub teeb raug kho kom phim qhov dav ntawm qhov zawj, yog li tsim kom muaj qhov nkag cua sov zoo rau phab ntsa sab.
2. Daim duab macroscopic ntawm qhov vuam los ntawm thawj txheej (L1) mus rau txheej xya (L7) rau kev vuam laser nrog lossis tsis muaj oscillation.
Txo cov qhov tsis zoo ntawm porosity:
Lub tshuab tiv thaiv ntawm laser swing ntawm cov qhov vuam tuaj yeem yog vim kev txhim kho qhov ruaj khov ntawm cov qhov me me thiab txhim kho qhov fluidity ntawm cov hlau kua. Daim duab 3 qhia txog tus cwj pwm ntws ntawm lub pas dej molten uas pom los ntawm cov khoom tracer thaum lub sijhawm vuam. Kev co ntawm lub teeb beam ua rau lub qhov me me tsim cov zaus siab thiab ceev ceev rotational stirring txav, uas txhawb nqa lub npuas dej ntws thiab muaj ib qho "ntxiab" nyhuv rau cov qhov khov. Tib lub sijhawm, kev co ntawm lub teeb beam ua rau thaj chaw ntawm lub qhov me me nce thiab txo qhov tshwm sim ntawm nws qhov tsis ruaj khov collapse los ua npuas dej.
3. (a) thiab (b) txoj kev taug kev ntawm cov khoom me me thaum lub sijhawm vuam; Thaj chaw qhib qhov tseem ceeb: (c) tsis muaj laser co (d) laser co.
Txo cov qhov tawg:
Qhov tawg ntawm cov hlau yog ib hom kev puas tsuaj uas tshwm sim hauv cov txheej txheem vuam vim muaj kev sib cuam tshuam ntawm kev ntxhov siab sab hauv thiab cov yam ntxwv ntawm cov hlau, uas feem ntau pom muaj nyob rau hauv thaj chaw kub hnyiab (HAZ) ntawm kev vuam. Kev tsim cov kab nrib pleb no yog cuam tshuam nrog qhov tsis muaj zog ntawm cov khoom siv ntawm qhov kub siab, kev ntxhov siab ntawm kev vuam thiab cov tshuaj lom neeg ntawm cov khoom siv. Cov thev naus laus zis laser vuam ib txwm muaj peev xwm tsim cov kab nrib pleb thermal hauv cov txheej txheem vuam, feem ntau yog vim cov laj thawj hauv qab no: Ua ntej, vim muaj lub zog siab ntawm laser vuam, ua rau muaj cua sov thiab txias sai ntawm thaj chaw vuam, ua rau muaj qhov kub thiab txias loj; Qhov thib ob, cov tshuaj tiv thaiv hlau hauv cov txheej txheem vuam yuav ua rau muaj kev sib cais ntawm cov khoom tsis huv nrog qhov chaw yaj qis, tsim cov theem tawg thiab ua rau muaj kev cuam tshuam ntawm cov kab nrib pleb. Thaum kawg, kev khov sai ntawm cov khoom siv yuav ua rau muaj qhov sib txawv ntawm cov qauv me me, thiab kev loj hlob ntawm cov siv lead ua ke yog los ntawm lub pas dej yaj mus rau qhov chaw, raws li pom hauv Daim Duab 4. Hauv qhov no, qhov rhiab heev rau kev tawg yog nce ntxiv.
4. Laser vuam solidification hom (a) ib txwm laser vuam (b) viav vias laser vuam.
Cov txheej txheem vuam laser oscillating tuaj yeem txo lossis tshem tawm qhov tshwm sim ntawm cov kab nrib pleb kub los ntawm kev qhia txog lub teeb laser oscillating. Thaum lub sijhawm vuam laser oscillating, qhov oscillation ntawm lub teeb laser tuaj yeem txhawb cov hlau ntws hauv lub pas dej molten, yog li txhim kho qhov sib xws ntawm cov qauv me me, thiab cov noob loj hlob coaxial hauv nruab nrab ntawm lub pas dej molten, raws li pom hauv Daim Duab 5. Cov noob coaxial no ua haujlwm ua lub thaiv kev tiv thaiv kom tiv thaiv kev tawg thiab ua raws li txheej thermal rwb thaiv tsev kom tiv thaiv kev tawg ntxiv. Tib lub sijhawm, lub laser oscillating pab txo cov theem brittle vim yog kev sib cais ntawm cov khoom, txo qhov kev pheej hmoo ntawm kev tawg thermal.
5. (A) cov yam ntxwv ntawm cov qauv solidification microstructure ntawm cov laser welding welds (B) cov yam ntxwv ntawm cov qauv solidification microstructure ntawm laser swing welds (CCW).
Piv nrog rau laser self-fusion welding, swing laser welding technology tau raug lees paub tias yog ib txoj hauv kev zoo los txo qhov kev nyiam ntawm porosity thiab txhim kho qhov tsis zoo xws li tsis fusion ntawm phab ntsa sab. Vim yog qhov cuam tshuam ntawm lub beam ntawm lub pas dej molten, nws muaj qhov zoo tseem ceeb hauv kev txhim kho qhov sib txawv haum, txhim kho qhov microstructure uniformity thiab refining cov noob. Daim ntawv thov ntawm laser swing welding technology tuaj yeem ua rau laser welding siv dav dua, thiab laser ua haujlwm precision welding tuaj yeem ua tiav rau cov workpieces loj dua thiab dav dua welds, uas yog, cov txheej txheem yooj yim thiab kev sib dhos raug ntawm cov khoom yog so.
Lub sijhawm tshaj tawm: Lub Ob Hlis-21-2025
