Dab tsi yog qhov txawv ntawm nruam laser (CW) thiab quasi nruam laser (QCW)?

Nruam nthwv dej (CW) lasers thiab quasi-nruam nthwv dej (QCW) lasers yog ob hom lasers uas feem ntau siv hauv ntau daim ntawv thov. CW lasers emit ib tug nruam beam ntawm lub teeb, thaum QCW lasers emit ib tug series ntawm luv pulses. Nov yog qee qhov sib txawv ntawm ob hom lasers:

Gaussian Energy Distribution of Single -Mode CW Laser

CW laser: CW yog cov ntawv luv rau "nruam yoj", uas txhais tau hais tias tsis tu ncua yoj laser. Nws ua tiav cov txiaj ntsig laser los ntawm kev ua kom lub zog txuas ntxiv, txhais tau hais tias lub laser tseem nyob mus txog thaum nws nres. CW lasers feem ntau muaj lub zog qis dua thiab siab dua qhov nruab nrab lub zog.

Raws li pom nyob rau hauv daim duab 1, nruam laser hais txog ib tug laser uas muaj peev xwm tsis tu ncua thiab tsis tu ncua emit teeb, collectively hu ua nruam laser. Feem ntau, cov hlau txiav thiab tooj liab txhuas vuam yog cov lasers txuas ntxiv, uas yog siv ntau tshaj plaws. Lub ntsiab tsis tseem ceeb rau cov txheej txheem laser nruam debugging muaj xws li: lub zog waveform, defocusing tus nqi, core txoj kab uas hla, thiab ceev;

Raws li pom nyob rau hauv daim duab 2, daim duab schematic ntawm Gaussian lub zog faib ntawm ib zaug -mos nruam laser qhia lub zog faib ntawm tus ntoo khaub lig seem ntawm ib tug laser beam. Lub zog nruab nrab yog qhov siab tshaj plaws, thiab lub periphery txo qis hauv lem, qhia txog Gaussian tis (ib txwm faib).

QCW Laser Pulse Zog thiab Pulse Vuam Sib Piv

QCW yog cov ntawv luv rau "quasi nruam yoj", uas txhais tau hais tias quasi nruam yoj laser. Raws li pom hauv daim duab ntawm Pulsed laser, laser feem ntau yog cov txheej txheem ntawm kev sib tshuam lub teeb emission; Daim duab b qhia txog kev faib hluav taws xob laser. Muab piv rau ib hom kev txuas ntxiv lasers, lub zog faib ntawm QCW yog ntau concentrated, uas txhais tau hais tias QCW muaj lub zog ntau dua (muaj peev xwm nkag mus tau zoo) dua li cov lasers tas li.

Qhov no tau tshwm sim hauv metallographic nam, uas txhais tau hais tias QCW muaj peev xwm nkag tau ntau dua. Lub metallographic nam tsim yog zoo ib yam li tus ntsia thawv, nrog ib tug ntau dua nam piv. Lub ncov laser lub zog thiab lub zog siab ceev ntawm QCW ua rau nws tsim nyog rau cov hlau tsis muaj zog, cov ntaub ntawv thermal rhiab heev Muaj qhov zoo hauv micro txuas; Daim duab c qhia lub vuam schematic daim duab ntawm Pulsed laser nrog ntau zaus. Nws tuaj yeem pom tau tias cov pulse vuam yog qhov ruaj khov nrog yuav luag tsis muaj spatter.

QCW lasers feem ntau yog siv lub tshuab hu ua Q-switching, uas yog ib txoj hauv kev zoo kom tau txais siab- lub zog luv pulses. Nws compresses cov zis dav dav txuas ntxiv mus rau hauv qhov nqaim heev rau cov pa tawm, yog li ua kom lub zog siab tshaj plaws ntawm lub teeb ci los ntawm ntau qhov kev txiav txim ntawm qhov loj. Thaum lub sij hawm Q- hloov, ua ntej qhov nce nruab nrab khw muag khoom muaj zog txaus, tag nrho laser resonator tuav lub siab kab noj hniav.

Rau kev taw qhia txog kev ua haujlwm luv luv dua li Q- hloov, tshawbultrafast laser tshuab rau precision ua.

Lub sijhawm no, lub laser tsis tuaj yeem tsim laser oscillation vim tias qhov chaw pib siab dhau lawm, yog li cov lej ntawm qib siab Particle tus lej tuaj yeem sau ntau ntau. Thaum lub tsub zuj zuj mus txog tus nqi saturation, cov kab noj hniav poob sai sai txo mus rau ib tug heev me me nqi, yog li feem ntau ntawm lub zog khaws cia los ntawm lub sab sauv hais hais yuav hloov dua siab tshiab rau hauv laser zog nyob rau hauv ib tug luv luv lub sij hawm, Tsim ib tug muaj zog laser pulse tso zis nyob rau hauv cov zis kawg.

Piv txwv li, lub zais pa zoo ib yam li lub nruas puag ncig tuaj yeem tso tawm ntawm nws lub nozzle thiab maj mam thiab tsis tu ncua deflated, uas yog hu ua lub laser txuas ntxiv. Kho tus nqi Q yog los ua kom lub zais pa thiab ua kom nws nrawm nrawm, uas yog kwv yees li cov ntaub ntawv txuas ntxiv thiab QCW.

Daim duab 4 Ib qho tshwm sim ntawm CW laser sealing ntsia thawv, zoo li ncaj weld seam, metallographic kuaj ntawm longitudinal seem; ib QCW laser sealing ntsia thawv tsos, ncaj weld tsos, longitudinal seem metallography;

Txhawm rau nkag mus tob rau hauv yuav ua li cas cov mem tes compression thiab lub zog siab ceev cuam tshuam rau qhov tseeb micro- ua, koj tuaj yeem nyeem peb cov lus qhia dav dav ntawmoptimizing fiber ntau laser micro- vuam thiab xaiv qhov zoo. Rau lub hauv paus kev puas tsuaj ntawm cov cuab yeej no, tshawb xyuas peb cov lus piav qhia tag nrho ntawmQCW quasi - laser tshuab txuas ntxiv.

1. Cov tsos ntawm QCW zoo ib yam li pulse qhov chaw vuam, nrog cov qauv ntses nplai, thaum lub laser txuas ntxiv muaj qhov nkhaus du thiab tsis tu ncua;

2. Lub zog input: nruam laser input, pulse intermittent input, reflected nyob rau hauv metallography, nruam laser weld longitudinal metallographic nruam, tsuas yog me ntsis fluctuations, mem tes laser yuav kom meej meej pom lub laser drilling zoo li ib tug taw tes laser metallographic splicing, txhua laser sib xws metallographic kom meej meej pom; Yog li ntawd, nruam vuam yog muaj zog tshaj QCW laser welding nyob rau hauv weld ob leeg zog.

Cov ntsiab lus sib piv ntawm Nruam (CW) thiab Quasi-Nruam (QCW) Laser Vuam Cov Ntsiab Cai

1. Tsis txhob cuam tshuam cov plumes ntawm cov khoom absorbance, ua rau cov txheej txheem ruaj khov: thaum lub sij hawm sib cuam tshuam ntawm laser thiab cov khoom, cov khoom yuav raug evaporation hnyav, tsim ib tug sib tov ntawm hlau vapor, plasma, thiab lwm yam gases saum lub molten pas dej ua ke, collectively hu ua hlau plumes. Cov hlau plumes no yuav tiv thaiv lub laser los ntawm kev ncav cuag cov khoom nto, uas ua rau lub zog tsis ruaj khov ntawm laser mus txog cov khoom nto, uas ua rau muaj qhov tsis xws luag xws li txaws, tawg, thiab qhov chaw; Txawm li cas los xij, lub pulse vuam ntawm QCW yog tus cwj pwm los ntawm cov teeb pom kev sib cuam tshuam (5ms ntawm lub teeb tso zis, 10ms ntawm cov teeb pom kev sib cuam tshuam, thiab tom qab ntawd lub teeb pom kev tom ntej), uas ua kom ntseeg tau tias txhua lub laser tawm tsam ntawm cov khoom nto tsis cuam tshuam los ntawm cov hlau plumes, ua rau nws ruaj khov dua piv rau vuam thiab muaj qhov zoo hauv cov phaj nyias nyias.

2. Stable Melt Pool: Qhov kev ntxhov siab ntawm lub qhov tseem ceeb ntawm lub pas dej yaj, lub sijhawm ntev ntawm kev ua haujlwm laser txuas ntxiv, thaj chaw tshav kub loj, thaj chaw loj yaj hauv pas dej, thiab kev nplua nuj ntawm cov kua hlau ua rau lub pas dej txuas txuas txuas ntxiv ntau dua li QCW laser melt pas dej. Qhov tsis xws luag xws li pores, tawg, thiab splashes yog ze ze rau lub pas dej molten: yog tias lub pas dej molten loj, qhov nro ntawm lub pas dej molten txo qis nrog qhov kub thiab txias, thiab lub pas dej loj molten yog qhov ua rau lub qhov dej loj dua, raws li qhia hauv a3; Vim yog lub zog ntau zog thiab lub sijhawm luv luv ntawm QCW laser vuam, lub pas dej molten feem ntau tshwm sim nyob ib ncig ntawm lub qhov tseem ceeb, thiab lub zog sib xws. Qhov txheeb ze tshwm sim ntawm qhov pores, tawg thiab spatters yog qis dua.

3. Saller tshav kub cuam tshuam cheeb tsam: nruam laser txiav ntawm cov khoom tsis tu ncua hloov tshav kub mus rau cov khoom siv, ua rau cov khoom nyias nyias muaj kev cuam tshuam rau thermal deformation thiab tsis xws luag xws li cov kab nrib pleb tshwm sim los ntawm kev ntxhov siab sab hauv. QCW cuam tshuam rau cov khoom siv, muab lub sijhawm txias, ua kom me me hauv thaj chaw tshav kub thiab cua sov, ua rau nws tsim nyog rau kev ua cov ntaub ntawv nyias; Thiab cov ntaub ntawv ze rau thermal sensors tsuas yog ua tiav siv QCW laser.

4. High Peak Power: With the same average power of continuous and QCW lasers, QCW can achieve higher peak power, higher energy density, greater melting depth, and stronger penetration. QCW muaj ntau qhov zoo hauv kev vuam ntawm tooj liab alloy thiab aluminium alloy ntawv. Lub zog ntom ntom ntawm lub laser txuas ntxiv nrog tib lub zog nruab nrab qis dua QCW, uas tuaj yeem ua rau lub laser tsis tuaj yeem tsim cov cim vuam ntawm cov khoom siv thiab tag nrho cov ntawm lawv yuav tsum tau xav txog. Yog hais tias lub laser yog siab dhau lawm, lub laser nqus tus nqi yuav nce siab heev tom qab ua tiav cov khoom melting, thiab cov khoom cua sov yuav dheev nce, uas ua rau incontrolled melting qhov tob thiab kub input. Nws tsis tuaj yeem siv rau hauv cov phaj nyias nyias, thiab tej zaum yuav muaj qhov tshwm sim ntawm kev ua tsis tiav los ua cov cim vuam lossis hlawv, uas tsis tuaj yeem ua tau raws li cov txheej txheem.

Cov ntsiab lus sib piv ntawm CW thiab QCW Laser Welding Keyhole Mechanisms

Vim hais tias ntawm no tsis yog - spatter thiab siab - tus yam ntxwv ruaj khov, quasi - nthwv dej tsis tu ncua tau hloov pauv kev tsim khoom. Kawm paub ntau ntxiv txog kev tsim vaj tsev tshwj xeeb tom qab cov tshuab no hauv peb tsab xov xwm:QCW fiber ntau laser vuam tshuab yog dab tsi?

Vim tias lub sijhawm mem tes luv luv (feem ntau yog ob peb milliseconds), cov cua sov nkag mus rau hauv qhov yog txo qis, yog li nws raug nquahu kom siv pulse laser vuam nyob ib ncig ntawm lub thermal sensor thiab cov ntaub ntawv phab ntsa nyias nyias. Nyob rau tib lub sijhawm, vim tias qhov loj ntawm lub zog xa tawm thaum pib ntawm lub plawv dhia, lub tshuab nqus laser vuam feem ntau haum rau cov hlau xaim. Feem ntau hu ua "hloov mem tes", lub zog nce siab thaum pib ntawm lub voj voog mem tes tsuas yog nyob rau ib feem me me ntawm tag nrho cov mem tes ntev. Txawm li cas los xij, nws lub hwj chim txaus los ua txhaum ntawm cov khoom siv qhov cuam tshuam thaum tuav lub zog nruab nrab qis, yog li txo cov cua sov. CW lasers yuav tsum muab ntau lub zog rau ob peb cov hlau uas muaj kev cuam tshuam zoo heev, thiab cov cua sov tsim tau yooj yim ua rau cov khoom lossis cov khoom hauv lawv puas. CW nruam yoj laser vuam feem ntau yog siab - lub zog laser nrog lub zog siab dua 500 watts. Feem ntau hais lus, hom laser no yuav tsum tau siv rau daim hlau nrog lub thickness ntawm 1 hli lossis ntau dua. Lub vuam tshuab yog qhov sib sib zog nqus nqus vuam raws li cov nyhuv ntawm qhov tseem ceeb, nrog rau qhov loj ntawm qhov sib piv ntawm 8: 1, tab sis kuj muaj cov cua kub nkag.

Thaum kawg, vim kev nce qib ntawm cov tshuab laser, kuj tseem muaj cov tshuab laser txuas ntxiv kom ua tiav cov mem tes vuam ntawm cov lasers tas li, nrog rau siab - zaus pulse vuam ntawm QCW lasers.

Zuag qhia tag nrho, ob qho tib si CW lasers thiab QCW lasers muaj lawv qhov zoo thiab qhov tsis zoo, nyob ntawm daim ntawv thov tshwj xeeb. CW lasers yog tsim rau daim ntaub ntawv uas yuav tsum tau ib tug nruam beam ntawm lub teeb, thaum QCW lasers yog haum rau daim ntaub ntawv uas yuav tsum tau luv luv pulses ntawm siab zog. Yog li ntawd, nws yog ib qho tseem ceeb uas yuav tau xaiv qhov zoo ntawm laser rau koj daim ntawv thov tshwj xeeb kom ua tiav cov txiaj ntsig zoo tshaj plaws.

Txhawm rau sib piv ntau qhov chaw laser ib sab, nyeem peb cov lus qhia rau lubqhov zoo thiab qhov tsis zoo ntawm ntau yam lasersua ntej xaiv qhov system.

Txawm hais tias koj daim ntawv thov xav tau lub siab ncov lub zog ntawm QCW laser rau ilv micro- cov khoom lossis cov khoom siv hluav taws xob txuas ntxiv ntawm tus qauv CW laser rau tuab hlau txiav, xaiv txoj cai kev lag luam yog qhov tseem ceeb. Tshawb nrhiav peb qhov ua tau zoo -Fiber Laser Vuam Tshuabqeb kom nrhiav tau qhov zoo tshaj plaws customized configuration rau koj kev txawj tej yam ntxiv ntau lawm.

Kev xaiv ntawm CW, QCW, thiab lwm qhov chaw laser pulsed los rau peb nqe lus nug txog koj cov txheej txheem tsim khoom: dab tsi yog cov khoom koj ua, tuab npaum li cas, thiab koj qhov tseem ceeb ntawm kev ceev thiab zoo yog dab tsi?

Khoom thickness thiab kub rhiab heev.CW lasers xa cov khoom ruaj khov, siab nruab nrab lub zog, uas ua rau lawv lub ntuj xaiv rau cov hlau phaj 1 hli thiab tuab dua. Rau cov ntawv nyias hauv qab 1 hli, lossis rau cov khoom uas nyob ze rau cov cua sov- cov ntsiab lus tseem ceeb xws li roj teeb lub hlwb, cov khoom siv hluav taws xob, thiab cov khoom siv hluav taws xob, cov khoom siv hluav taws xob sib cuam tshuam ntawm QCW laser ua kom cov cua sov nkag qis thiab tiv thaiv kev cuam tshuam. Tib lub logic siv rau kev xaiv ntawm cov qauv txuas mus ntxiv thiab cov mem tes dav dav: ntev pulse widths haum tuab, zam cov ntaub ntawv, thaum luv, siab -pulses ncov tiv thaiv nyias los yog muag heev.

Reflectivity ntawm lub workpiece.Cov hlau muaj kev cuam tshuam zoo xws li tooj liab, txhuas, thiab kub ua rau muaj kev cuam tshuam loj ntawm cov teeb meem nqaj. Lub CW laser yuav tsum thawb lub zog txaus kom tawg los ntawm qhov kev cuam tshuam no, uas tuaj yeem yooj yim overheat qhov. Lub QCW laser concentrates nws lub zog rau hauv luv luv pulses nrog lub siab ncov siab heev, coupling rau hauv qhov chaw muaj kev ntseeg siab dua thaum ua kom lub zog nruab nrab qis. Qhov no yog vim li cas QCW qhov chaw tau dav siv rau tooj liab thiab aluminium alloy daim ntawv vuam.

Kev sib piv nrog precision.Yog tias koj cov kab khiav tuab - phaj txiav lossis sib sib zog nqus- kev nkag vuam nyob ib ncig ntawm lub moos, lub zog nruab nrab ntawm CW laser maximizes throughput. Yog tias koj cov txheej txheem xav tau kev tswj xyuas kom zoo, me me spatter, thiab cua sov me me- thaj chaw cuam tshuam, QCW lossis qhov chaw pulsed muab qhov tseeb rau koj ntawm qhov nrawm nrawm. Tsis muaj universal "zoo tshaj" laser - qhov zoo yog qhov uas phim cov khoom siv, kev sib koom tes lossis txiav geometry, thiab lub hom phiaj zoo ntawm koj daim ntawv thov tshwj xeeb. Thaum tsis ntseeg, xa cov qauv mus rau koj lub chaw muag khoom laser rau kev sim ua ntej ua haujlwm rau lub tshuab teeb tsa.

CW-vim-QCW kev txiav txim siab zoo li sib txawv hauv txhua daim ntawv thov laser loj, thiab ob lub thev naus laus zis tsis tshua muaj peev xwm hloov tau sab nraud vuam.

Txiav.Nruam yoj lasers dominate industrial txiav. Lawv cov khoom tso tawm tsis tu ncua ua rau cov kerfs du ntawm kev kub ceev, thiab rau cov phaj thicknesses siab tshaj 2-3 hli qhov tob -kev nkag mus rau qhov tseem ceeb yog qhov tseem ceeb ntawm CW kev tswj hwm. QCW lasers tsis yog siv rau tej daim ntawv txiav, tab sis lawv pom ib tug niche nyob rau hauv micro- txiav nyias foils qhov twg tshav kub yuav tsum nyob rau hauv lub zos.

Vuam.Qhov no yog daim ntawv thov uas CW thiab QCW sib tw tiag tiag, raws li tau piav qhia hauv ntu saum toj no: CW rau kev sib sib zog nqus- nkag thiab tuab- phaj vuam, QCW rau cov ntawv nyias, cua sov- cov khoom sib dhos, thiab cov copper reflective- txhuas pob qij txha.

Kos npe.Pulsed lasers - suav nrog QCW ntawm luv luv -pulse kawg - dominate laser marking vim lub ncov lub zog tam sim no vaporizes cov khoom thaum lub zog nruab nrab qis ua kom lub ntsej muag txias. CW qhov chaw tsis siv rau kev kos npe zoo.

Ntxuav.Ob txoj kev pabcuam kev tu lub laser: nruam yoj lasers tshem tawm cov xim, xeb, thiab coatings nyob rau hauv cov cheeb tsam loj sai sai, thaum pulsed lasers ntxuav ilv qhov chaw nrog meej tswj. Loj - nplai kev lag luam txheej tshem tawm thiab xeb stripping feem ntau nyiam cov kev tswj hwm txuas ntxiv, uas yog vim li cas cov tshuab ntxuav laser txuas ntxiv yog cov txheej txheem hauv cov kab ntau lawm. Rau cov neeg yuav khoom ntsuas kev daws teeb meem, anruam yoj laser ntxuav tshuabyog qhov mus - rau kev xaiv rau siab -throughput nto npaj.

Drilling thiab micro-kev ua haujlwm.QCW lasers ua tau zoo ntawm qhov drilling thiab micro- koom nrog vim tias lawv lub zog ncov tsim qhov tob, nqaim qhov nrog qhov sib piv siab, zoo ib yam li tus ntsia thawv- zoo li cov duab metallographic tau piav qhia ua ntej.

Lub takeaway: daim ntawv qhia koj daim ntawv thov mus rau qhov matrix no ua ntej, ces xaiv qhov chaw. Feem ntau cov kab ntau lawm xaus nrog ntau tshaj ib hom laser - CW qhov chaw rau kev ua haujlwm hnyav thiab lub zog los yog QCW qhov chaw rau kev ua haujlwm zoo.

CW thiab QCW tsuas yog ob tug tswv cuab ntawm tsev neeg laser loj dua. Kev nkag siab qhov chaw lawv zaum yuav pab koj txiav txim siab yuav khoom zoo dua thiab cia siab tias yuav mus qhov twg.

Laser tsev neeg.Ntawm qhov kawg, siab -lub zog txuas ntxiv lasers pab txiav thiab sib sib zog nqus vuam; Ntawm qhov tod tes, ultrashort-pulse lasers xa lub zog hauv femtoseconds thiab picoseconds rau txias, kev puas tsuaj-dawb micro- ua. Nruab nrab ntawm lawv zaum pulsed, QCW, thiab nanosecond qhov chaw npog cov cim, drilling, thiab vuam zoo. Txhua lub pulse- dav dav daim duab qhia chaw rau cov ntawv thov sib txawv - qhov dav koj cov khoom lag luam, qhov ntau dua koj yuav xav tau ntau qhov chaw ib sab.

Semiconductor lasers li lub tsev blocks.High- lub zog diode thiab fiber ntau lasers tau nce ntxivsemiconductor laser tshuab, uas muab lub zog twj tso kua mis tom qab feem ntau muaj CW thiab QCW systems. Raws li cov chips semiconductor thawb mus rau qhov ci ntsa iab ntau dua thiab tus nqi qis dua, lawv rub tag nrho tsev neeg mus tom ntej - ntau lub zog ib duas, zoo dua beam zoo, thiab cov wavelengths tshiab rau cov ntaub ntawv uas yav tas los nyuaj rau txheej txheem.

Vim li cas laser ua kom nthuav dav.Piv nrog rau cov txheej txheem ib txwm siv, kev ua laser tsis muaj -kev sib cuag, tsis muaj cuab yeej hnav, programmable yooj, thiab rov ua tau zoo dua. Cov txheej txheemqhov zoo ntawm laser ua tshuabpiav qhia tias yog vim li cas cov chaw tsim khoom hloov pauv cov txheej txheem kho tshuab, thermal, thiab tshuaj lom neeg nrog cov kev daws teeb meem laser hla cov ntawv hlau, hluav taws xob, tsheb, thiab kev lag luam hluav taws xob.

Kev lag luam mus qhov twg.Kev ua lag luam txuas ntxiv mus rau nruab nrab lub zog siab dua, luv dua pulse widths, thiab kev tswj cov txheej txheem ntse dua. Ua raws lilaser kev lag luam tsom xamluam tawm los ntawm cov kws tsim khoom thiab cov neeg soj ntsuam kev lag luam yog ib txoj hauv kev los taug qab cov hom twg tau txais hauv av - thiab rau lub sijhawm koj lub tshuab peev tom ntej. Txawm koj daim ntawv thov, pib los ntawm cov khoom thiab lub hom phiaj zoo, thiab cia cov txheej txheem cov ntaub ntawv - tsis cwj pwm - xaiv ntawm CW, QCW, thiab pulsed.