Ib hom yog dab tsi? Multimode yog dab tsi?
Qhov tseem ceeb sib txawv ntawm ib hom laser thiab multimode laser yog tias ib hom laser tsuas muaj ib hom nyob rau hauv cov zis beam qauv, thaum lub multimode laser muaj ntau hom nyob rau hauv cov zis beam qauv;
Ntawd yog, ib hom yog hais txog ib hom kev faib tawm ntawm lub zog laser hauv ob sab dav hlau, thaum multimode yog hais txog lub zog spatial faib hom tsim los ntawm superimposing ntau hom kev faib ua ke. Piv txwv li, koj lub laser yog 1064nm, piv txwv li koj ntaus tawm tag nrho 1064, tab sis rau lub hom phiaj, yog tias muaj ob peb lub ntsiab lus nyob rau tib lub sijhawm, xws li 10 rings 9 rings 7 rings 2 rings, txhua yam, txawm tias lub qhov loj, uas yog. multi-transverse hom. Tab sis yog tias koj tua tag nrho 10 rings ib qho taw tes, qhov ntawd yog ib qho kab rov tav tuag.
Hais txog kev faib hluav taws xob:
Kev lag luam feem ntau hais txog ib hom, xa mus rau transverse hom ntawm lub laser, piv txwv li, tsuas muaj ib hom nyob rau hauv tus ntoo khaub lig-section, uas yog Gaussian faib, nrog rau lub focal point yog qhov chaw mus rau sab nrauv, thiab lub zog laser. kev ceev txo nyob rau hauv kev txiav txim. Multi-mode, ntawm qhov tod tes, nthuav qhia ntau lub zog hauv ntu ntu, thiab ntau hom muaj, ntau lub zog raug faib rau hauv lub tiaj tiaj, piv txwv li piv rau liab tassel thiab hma tus hniav lo. .
Qhov sib txawv ntawm ib hom thiab ntau hom hauv kev siv vuam yog tias: yog tias koj xav mus sib sib zog nqus fusion vuam, nws tsim nyog rau ib hom lossis tsawg hom, ib hom muaj qhov zoo hauv kev sib sib zog nqus fusion vuam, pawg vuam, vuam fillet. , thiab lwm yam. Siab zog ceev yog yooj yim rau ntaus lub fusion tob. Multi-hom yog tsim rau ntiav welding, zoo flatness, uniform weld zog, tab sis kuj kom tsis txhob muaj kev poob zoo xws li ablation thiab perforation nyob rau hauv nruab nrab ntawm lub weld coj los ntawm qhov tsawg melting point ntawm lub hauv paus khoom.
Piv txwv tias cov kab ke ntsug ntawm txoj kev nkhaus sawv cev, thiab liab yog lub zog ua kom muaj zog, nws tuaj yeem pom tau tias cov khoom siv hluav taws xob sab saum toj, nws tuaj yeem pom tau tias cov tib hom muaj zog nyob rau hauv lub zog ntom, thiab unit zog ceev yog ntau dua.
Feem ntau, ib hom multimode tuaj yeem txawv ntawm laser beam zoo M²:
M² yam yog xam los ntawm kev faib cov khoom ntawm qhov tseeb beam dav thiab lub divergence lub kaum sab xis los ntawm cov khoom ntawm lub zoo tagnrho beam dav thiab lub divergence lub kaum sab xis, qhov twg lub zoo tagnrho beam yog txhais los ntawm lub hauv paus hom Gaussian beam thiab lub beam dav yog txhais los ntawm lub sijhawm thib ob xaj. Thaum lub laser beam dhau los ntawm lub aberration-free optical system, nws M² yam yog kis tau tus mob invariant thiab M² Ntau tshaj los yog sib npaug rau 1; qhov deb M² deviates los ntawm 1, qhov phem ntawm laser beam zoo yog.
Nyob ntawm M², lasers tuaj yeem muab faib ua peb hom: ntshiab ib hom lasers nrog M2 < 1.3, quasi-ib hom lasers nrog M2 ntawm 1.3 thiab 2.{{10}}, thiab multimode lasers nrog M2> 2.0.
Ib hom laser piv rau multimode:
Ib hom laser fiber ntau txoj kab uas hla yog me me (14um), lub zog yog Gaussian tis, qhov chaw focal me me, siab zog ceev (tib lub zog, lub zog ceev yog 4-10 zaug ntau dua multimode), thiab cov Thaum tshav kub kub-cuam tshuam cheeb tsam yog me me, tshwj xeeb tshaj yog rau siab anti-alloy (aluminium, tooj liab) instantly tsim ib tug molten pas dej ua ke keyhole (lub zog ceev yog ntau dua li lub siab anti-alloy melting pib), tsis muaj siab reversal, tsis yooj yim rau kev puas tsuaj. fiber ntau, thiab tuaj yeem ua tiav siab tiv thaiv alloy High-speed processing, tab sis kuj nyob rau hauv micro-kev sib txuas muaj qhov zoo.
Thaum tshav kub kub input: ib leeg-hom zog yog ntau concentrated, me me tshav kub-tshem tawm tsam, me me yaj pas dej ua ke, me me thermal deformation, loj melting qhov tob, ib hom kab teeb zoo li rab riam ntse, ntau hom zoo li lub mos txwv.
Vuam txheej txheem: ib leeg-hom keyhole qhib yog me me, ntau hom keyhole qhib yog loj, muaj kev cuam tshuam nyob rau hauv lub vuam stability, ib leeg-hom qis-ceev vuam tsis ruaj khov, yooj yim kom muaj spatter thiab porosity, yuav tsum phim lub oscillating taub hau, daim iav vibration, los yog kev kub ceev welding, qis-ceev vuam spatter yog loj, nyias phaj stacking, sputtering vuam; reflected nyob rau hauv metallographic, ib hom muaj ntau dua qhov tob rau dav piv (qhov piv ntawm metallographic qhov tob rau dav); Ntau hom tuaj yeem ua tau dawb hauv cov thermal conduction vuam thiab sib sib zog nqus fusion vuam hloov, haum rau splicing, thiab sib xws nrog qhov sib txawv ntawm qhov sib txawv.
Daim ntawv thov sib txawv: ib hom vim qhov chaw me me, lub zog concentration, kev nkag mus zoo, kev tswj xyuas kom zoo ntawm cov khoom siv hluav taws xob, tsim nyog rau kev sib txuas ntawm micro txuas (3C, kev kho mob, thiab lwm yam) tab sis lub zog tsis siab (qhov siab tshaj plaws tam sim no 3{{ 4}}W mature lag luam); ntau hom tuaj yeem muab lub zog ntau dua (10,000 watts), haum rau thaj chaw loj vuam, sib raug zoo dua nrog cov khoom sib txawv ntawm cov thickness ua, rau cov thicknesses sib txawv, qhov sib txawv, cov ntaub ntawv sib txawv tuaj yeem siv tau. Tus nqi ntawm ntau hom kuj muaj qhov zoo.
