01 Daim Ntawv Qhia
Nyob rau hauv lub tshav pob ntawm laser ua, tshwj xeeb tshaj yog nyob rau hauv sib sib zog nqus welding, ib txwm Gaussian beams, txawm hais tias muaj zog ceev ceev, feem ntau ua rau overly concentrated zog faib, uas yuav yooj yim ua rau tsis xws luag xws li keyhole instability, spatter, thiab porosity. Txhawm rau daws cov teeb meem no, lub zej zog kev kawm tau hais kom siv Bessel beams lossis annular beams los cuam tshuam lub zog, ntawm cov uas kho lub nplhaib hom (ARM) lasers tau raug pov thawj los ua kom lub pas dej molten zoo thiab txo qhov tsis xws luag. Txawm li cas los xij, cov kev daws teeb meem sib xyaw uas twb muaj lawm feem ntau ntsib teeb meem xws li tus nqi siab, qhov ntev ntawm qhov focal ntev, thiab kev hloov kho tsis pub dhau ntawm spatial zog faib. Piv txwv li, lub nplhaib lasers feem ntau xav kom Gaussian thiab lub nplhaib beams nyob rau tib lub dav hlau focal, uas tsis tuaj yeem ua tau raws li cov kev xav tau tshwj xeeb rau txoj haujlwm focal sib txawv hauv cov phaj tuab. Txhawm rau kov yeej cov kev txwv no, txoj kev tshawb fawb no tau nthuav tawm txoj kev teeb tsa lub teeb pom kev tshiab- Kho kom pom tseeb Gaussian-Nplhaib hom (AFGRM) laser. Txoj kev no siv tus nqi qis -tus nqi 'ib daim iav freeform' los hloov tus qauv Gaussian laser qhov chaw rau hauv cov kab sib txuas nrog qhov sib txawv focal lengths, adjustable power ratios, thiab ring radii, aiming to achieve high-welding quality with two deep penetration and low defects.
02 Phau Ntawv Qhia Tag Nrho
Txoj kev tshawb no nthuav tawm txoj kev hloov kho tshiab ntawm lub teeb pom kev zoo, uas yog hloov pauv tus qauv Gaussian laser qhov chaw mus rau hauv qhov kho tau -focus Gaussian-ring hom (AFGRM) laser nrog nws tus kheej adjustable focal ntev, lub hwj chim piv, thiab lub nplhaib vojvoog, los ntawm kev tsim ib qho kev hloov kho ib daim iav dawb daim iav. Cov txheej txheem no cleverly tiav spatial sib cais thiab recombination ntawm lub beam, tso cai rau lub central Gaussian beam txais ib tug tsis zoo defocus lub xeev los txhim khu kev nkag mus rau hauv, thaum lub nplhaib sab nrauv beam tsom rau lub workpiece nto kom nthuav thiab stabilize lub molten pas dej ua ke. Qhov no muaj txiaj ntsig zoo rau cov teeb meem hauv ib txwm muaj siab - lub zog sib sib zog nqus nqus vuam, qhov chaw muaj zog tuaj yeem ua rau lub pas dej molten instability thiab porosity defects. Vuam thwmsim ua rau 16 hli tuab SUS304 stainless hlau daim hlau qhia tau hais tias, piv rau cov pa Gaussian lasers ntawm tib lub hwj chim, AFGRM laser nrog ib tug zoo zog piv (8: 2) tsis tsuas yog nce weld nkag los ntawm 37.0%, tab sis kuj txo porosity los ntawm 17.58% mus rau 0.24%, qhov no yog ib tug high-ceev technology{3. txhim khu kev qha kev daws teeb meem, muaj peev xwm zoo rau kev txhim kho qhov zoo ntawm cov phaj tuab sib sib zog nqus nqus vuam.
Daim duab 1 nyob rau hauv daim duab tsom xam qhia tau hais tias simulated cov ntsiab lus ntawm cov nqaj propagation tom qab shaping los ntawm ib tug freeform daim iav nrog lub hwj chim piv ntawm 8: 4. Nws pom tau tias ib daim iav freeform tuaj yeem tsim lub laser rau hauv nruab nrab nqaj thiab lub nplhaib - zoo li tus nqaj, thiab tuaj yeem ua tiav cov kev hloov pauv los ntawm kev sib cais mus rau kev sib koom ua ke thaum lub sij hawm nthuav tawm, tsim ib qho chaw sib xyaw hauv thaj tsam focal nrog lub zog sib faib thiab tswj tau cov proportions. Qhov txiaj ntsig no tau lees paub qhov ua tau zoo ntawm cov kab teeb pom kev zoo no hauv kev ua tiav ob qho tib si me me thiab kev tswj xyuas meej ntawm lub hauv paus - rau - lub zog peripheral.
Daim duab 1 Schematic simulation ntawm beam propagation tom qab shaping nyob rau hauv lub AFGRM system: (a) Zuag qhia tag nrho laser propagation qauv (b) Beam qauv ntawm 297 mm: (b1) – (b2) Laser fais fab tuag density tis thiab 3D zaub ntawm 297 mm. (c) Beam qauv ntawm 300 mm: (c1)–(c2) Laser fais fab tuag density faib thiab 3D zaub ntawm 300 mm.
Daim duab 2 piv tus ntoo khaub lig-sectional morphology ntawm welds ua nrog AFGRM composite beam thiab ib tug pa Gaussian beam. Cov txiaj ntsig tau pom tias cov kab hluav taws xob Gaussian ib txwm ua ib qho V- zoo li cov vuam, nrog rau qhov tob tob zuj zus ntxiv vim tias tag nrho lub zog nce. Nyob rau hauv sib piv, AFGRM beam tsim ib tug ruaj khov "T- zoo li" weld, nrog rau qhov tob tob pib nce thiab ces stabilizing raws li lub hwj chim ntawm lub annular beam nce, ua tiav qhov siab tshaj plaws nkag ntawm 8: 2 zog piv. Cov txiaj ntsig no qhia tau hais tias AFGRM beam tuaj yeem ua tiav qhov sib sib zog nqus zoo dua -kev nkag mus vuam los ntawm kev sib koom ua ke tswj cov vuam morphology thiab qhov tob tob los ntawm qhov nruab nrab-annular zog hloov.
Daim duab 2 Kev sib piv ntawm weld seam morphology ntawm cov pa Gaussian laser thiab AFGRM laser vuam
Daim duab 3 qhia tau hais tias tus ntoo khaub lig longitudinal -sectional morphology tuaj yeem cuam tshuam qhov kev faib tawm ntawm qhov pores hauv qhov vuam. Piv nrog cov pa Gaussian lasers, AFGRM lasers txo cov pores nyob rau hauv lub weld nyob rau hauv tib Gaussian hom hwj chim thiab tag nrho cov hwj chim tej yam kev mob. Lub caij no, nrog rau kev nce ntawm lub zog laser, qhov kev faib ua feem ntawm qhov pores nyob rau hauv cov pa Gaussian laser vuam qhia tau hais tias ib tug downward sib, uas yog feem ntau yog ntaus nqi mus rau lub enhanced khiav ntawm cov kua hlau nyob rau hauv lub molten pas dej ua ke. Cov kev taw qhia ntawm annular lasers ntxiv suppresses pore tsim, qhia tau hais tias lawv muaj ib tug meej kom zoo dua nyob rau hauv kev txhim kho lub molten pas dej ua ke dynamics thiab cov tej yam kev mob rau roj khiav.
04 Xaus
Txoj kev tshawb no tau ua tiav ib qho tshiab beam -shaping txoj kev raws li ib daim iav freeform, muab ib tug npaum thiab tsawg - nqi tov rau tuab phaj laser vuam. Cov lus xaus tseem ceeb yog raws li hauv qab no: 1. Kev Tsim Kho Tshiab: Lub tswv yim AFGRM laser tau thov thiab siv tau, ua tiav qhov sib cais ntawm Gaussian thiab nplhaib - cov qauv zoo li qub thiab kev ywj pheej hloov ntawm focal ntev los ntawm ib qho kev cuam tshuam . 2. Kev Txhim Kho Kev Ua Haujlwm: Hauv qhov vuam ntawm 16mm AFG2 lub zog stainless hlau, qhov sib npaug txhim kho qhov tob tob los ntawm 37.0% thiab txo qhov porosity los ntawm 98.6% piv rau cov pa lasers, ua kom cov vuam zoo tau zoo. 3. Daim Ntawv Thov Kev Pom Zoo: Cov thev naus laus zis no tsis tsuas yog hais txog qhov kev sib tw ntawm ib txhij ua tiav qhov tob tob thiab zoo nyob rau hauv tob- kev nkag mus rau vuam siv hluav taws xob, tab sis kuj muaj cov nqi qis thiab muaj peev xwm ntawm cov khoom siv hluav taws xob zoo heev. kam rau ua (30kW) ntawm lub reflector.
