Nyob rau hauv xyoo tas los no, laser ntxuav tau dhau los ua ib qho ntawm cov kev tshawb fawb hotspots hauv kev lag luam kev lag luam, kev tshawb fawb npog cov txheej txheem, kev xav, khoom siv thiab kev siv. Nyob rau hauv kev lag luam kev siv tshuab, laser tu tshuab muaj peev xwm txhim khu kev ntseeg tau ntau ntawm ntau qhov sib txawv substrate nto, tu cov khoom xws li hlau, txhuas, titanium, iav thiab cov ntaub ntawv sib xyaw, thiab lwm yam., daim ntawv thov kev lag luam npog aerospace, aviation, shipping, high-speed. rail, automotive, pwm, nuclear zog thiab marine thiab lwm yam teb.
Laser tu tshuab, yos rov qab mus rau xyoo 1960, muaj qhov zoo ntawm kev tu zoo, ntau yam kev siv, siab precision, tsis sib cuag thiab siv tau. Hauv kev tsim khoom lag luam, kev tsim khoom thiab kev saib xyuas thiab lwm yam kev lag luam muaj ntau yam ntawm daim ntawv thov kev cia siab, yuav tsum tau hloov ib nrab los yog tag nrho cov kev tu ib txwm siv, thiab dhau los ua cov kev cog lus ntsuab tu tshuab hauv xyoo pua 21st.
Laser ntxuav txoj kev
Laser tu txheej txheem yog heev complex, nrog rau ntau yam ntawm cov khoom tshem tawm mechanisms, rau ib tug laser tu txoj kev, lub tu txheej txheem yuav muaj nyob rau tib lub sij hawm ib tug ntau yam ntawm mechanisms, uas yog feem ntau tshwm sim los ntawm kev sib cuam tshuam ntawm lub laser thiab cov khoom, xws li. Cov khoom nto ablation, decomposition, ionization, degradation, melting, combustion, vaporization, vibration, sputtering, expansion, shrinkage, tawg, tev, shedding thiab lwm yam kev hloov ntawm lub cev thiab tshuaj. txheej txheem.
Tam sim no, cov txheej txheem tu laser raug feem ntau yog peb yam: laser ablation tu, kua zaj duab xis-pab laser tu thiab laser shock yoj tu txoj kev.
Laser ablation tu txoj kev
Cov txheej txheem tseem ceeb yog thermal expansion, vaporization, ablation thiab theem tawg. Lub laser ua ncaj qha rau ntawm cov khoom yuav raug tshem tawm ntawm qhov chaw ntawm lub substrate thiab lub ambient tej yam kev mob yuav ua tau huab cua, rarefied gas los yog nqus. Cov kev ua haujlwm yog qhov yooj yim thiab feem ntau siv los tshem tawm ntau yam txheej txheej, xim, hais los yog av. Daim duab hauv qab no qhia txog daim duab txheej txheem rau cov txheej txheem laser ablation tu.
Thaum lub laser irradiation nyob rau saum npoo ntawm cov khoom, lub substrate thiab tu cov ntaub ntawv yog thawj thermal expansion. Nrog rau kev nce hauv laser kev sib cuam tshuam lub sij hawm nrog cov khoom siv tu, yog tias qhov kub thiab txias yog qis dua li cov khoom siv tu lub cavitation, cov khoom siv tu tsuas yog cov txheej txheem hloov lub cev, qhov sib txawv ntawm cov khoom siv tu thiab cov substrate thermal expansion coefficient ua rau lub siab ntawm lub interface. , cov khoom siv tu buckling, tearing los ntawm qhov chaw ntawm lub substrate, cracking, mechanical puas, vibration crushing, thiab lwm yam., cov khoom tu yog tshem tawm los ntawm dav hlau los yog stripped ntawm substrate nto.
Yog tias qhov ntsuas kub siab tshaj qhov ntsuas kub ntawm cov khoom siv ntxuav, yuav muaj ob qhov xwm txheej: 1) ablation qhov pib ntawm cov khoom siv tu yog tsawg dua li cov substrate; 2) lub ablation pib ntawm cov khoom tu yog ntau dua li cov substrate.
Ob qhov xwm txheej ntawm kev ntxuav cov ntaub ntawv no yog melting, cavitation thiab ablation thiab lwm yam physicochemical kev hloov, kev tu mechanism yog complex, ntxiv rau thermal cuam tshuam, tab sis kuj yuav muaj xws li ntxuav cov ntaub ntawv thiab substrates ntawm molecular bond breakage, ntxuav cov ntaub ntawv decomposition los yog degradation, theem. tawg, ntxuav cov ntaub ntawv gasification instantaneous ionization, tiam ntawm plasma.
(1)Ua kua zaj duab xis pab laser ntxuav
Txoj kev mechanism feem ntau muaj kua zaj duab xis boiling vaporization thiab kev co, thiab lwm yam.. Kev siv qhov yuav tsum tau xaiv qhov tsim nyog laser wavelength, nyob rau hauv ib txoj kev los ua kom tsis muaj kev cuam tshuam lub siab nyob rau hauv lub laser ablation tu txheej txheem, yuav siv tau los tshem tawm. qee qhov nyuaj rau tshem tawm cov khoom tu.
Raws li pom hauv daim duab hauv qab no, cov yeeb yaj kiab ua kua (dej, ethanol lossis lwm yam kua) ua ntej npog hauv qhov chaw ntawm cov khoom tu, thiab tom qab ntawd siv lub laser irradiate nws. Ua kua zaj duab xis absorbs laser zog uas ua rau muaj zog tawg ntawm cov kua xov xwm, tawg ntawm boiling kua high-speed txav, lub zog hloov mus rau cov ntaub ntawv ntxuav, siab transient explosive quab yuam yog txaus los tshem tawm cov av av kom ua tiav cov hom phiaj tu.
Lub tshuab ua kua zaj duab xis-pab laser tu txoj kev muaj ob qhov tsis zoo.
Cumbersome txheej txheem thiab nyuaj los tswj cov txheej txheem.
Vim yog siv cov yeeb yaj kiab ua kua, cov tshuaj muaj pes tsawg leeg ntawm cov substrate nto tom qab ntxuav yog yooj yim hloov thiab tsim cov tshuaj tshiab.
(1)Laser shock yoj hom tu txoj kev
Cov txheej txheem mus kom ze thiab cov txheej txheem yog qhov txawv ntawm thawj ob, lub tshuab feem ntau yog kev tshem tawm yoj yoj quab yuam tshem tawm, tu cov khoom yog cov khoom siv, feem ntau yog rau kev tshem tawm cov khoom (sub-micron lossis nanoscale). Cov txheej txheem yuav tsum tau nruj heev, ob qho tib si los xyuas kom meej tias lub peev xwm ionize huab cua, tab sis kuj yuav tsum tswj kom muaj kev ncua deb ntawm lub laser thiab lub substrate kom ntseeg tau tias qhov kev txiav txim ntawm qhov cuam tshuam ntawm cov quab yuam yog loj txaus.
Laser shock yoj tu txheej txheem schematic daim duab qhia hauv qab no, lub laser mus rau qhov sib npaug mus rau cov kev taw qhia ntawm lub substrate nto txhaj, thiab lub substrate tsis tuaj rau hauv kev sib cuag. Txav mus rau lub workpiece lossis laser lub taub hau los kho lub laser tsom mus rau cov khoom nyob ze ntawm lub laser tso zis, qhov focal point ntawm huab cua ionization tshwm sim yuav tshwm sim, ua rau poob siab tsis muaj zog, poob siab tsis tau mus rau kev nthuav dav ntawm lub kheej kheej, thiab txuas mus rau kev sib cuag. nrog cov particle. Thaum lub sij hawm ntawm lub transverse tivthaiv ntawm lub shock yoj ntawm lub particle yog loj dua lub sij hawm ntawm lub longitudinal tivthaiv thiab particle adhesion quab yuam, particle yuav raug tshem tawm los ntawm dov.
Laser tu tshuab
Laser tu tshuab yog tsuas yog nyob ntawm qhov chaw ntawm cov khoom tom qab nqus ntawm lub zog laser, los yog vaporization thiab volatilization, los yog instantaneous thermal expansion kom kov yeej cov adsorption ntawm cov khoom ntawm qhov chaw, kom cov khoom los ntawm qhov chaw, thiab tom qab ntawd ua tiav cov khoom siv. lub hom phiaj ntawm kev ntxuav.
Roughly summarized li: 1. laser vapor decomposition, 2. laser stripping, 3. thermal expansion ntawm av hais, 4. substrate nto vibration thiab particle vibration plaub yam
Piv nrog rau cov txheej txheem tu ib txwm, laser tu tshuab muaj cov yam ntxwv hauv qab no.
1. Nws yog "qhuav" ntxuav, tsis muaj tshuaj ntxuav lossis lwm yam tshuaj lom neeg, thiab kev huv huv yog ntau dua li cov txheej txheem tshuaj ntxuav.
2. Lub peev xwm ntawm kev tshem tawm cov av thiab cov khoom siv substrate yog dav heev, thiab
3. Los ntawm cov kev cai ntawm cov txheej txheem laser, tsis tuaj yeem ua rau lub ntsej muag ntawm lub substrate ua rau lub hauv paus ntawm kev tshem tawm cov kab mob tsis zoo, yog qhov chaw zoo li tshiab.
4. Laser tu tuaj yeem ua haujlwm tau yooj yim.
5. Cov khoom siv laser decontamination tuaj yeem siv tau ntev, cov nqi khiav haujlwm qis.
6. Laser tu tshuab yog ib qho: ntsuab: cov txheej txheem tu, tshem tawm cov khoom pov tseg yog cov hmoov nplej, me me, yooj yim khaws cia, yooj yim yuav tsis ua paug ib puag ncig.
Nyob rau xyoo 1980, txoj kev loj hlob sai ntawm kev lag luam semiconductor nyob rau saum npoo ntawm silicon wafer daim npog qhov ncauj kab mob ntawm cov tshuab ntxuav tau muab tso rau hauv cov kev xav tau ntau dua, lub ntsiab lus tseem ceeb yog kov yeej cov kab mob micro-particles thiab substrate ntawm lub zog adsorption zoo. , cov tshuaj ntxuav tu ib txwm siv, kev tu txhua yam, ultrasonic tu txoj kev tsis tuaj yeem ua tau raws li qhov xav tau, thiab kev ntxuav laser tuaj yeem daws cov teeb meem kev ua qias tuaj, kev tshawb fawb thiab kev siv tau tsim sai heev.
Xyoo 1987, thawj qhov tshwm sim ntawm daim ntawv thov patent ntawm laser tu. Nyob rau xyoo 1990, Zapka tau ua tiav siv laser tu tshuab rau cov txheej txheem tsim khoom semiconductor kom tshem tawm cov micro-particles ntawm lub ntsej muag, paub txog cov ntawv thov thaum ntxov ntawm laser tu tshuab hauv kev lag luam. Xyoo 1995, cov kws tshawb fawb tau siv 2 kW TEA-CO2 laser kom ua tiav kev tu lub dav hlau fuselage xim tshem tawm.
Tom qab nkag mus rau hauv lub xyoo pua 21st, nrog rau kev loj hlob ceev ntawm ultra-luv mem tes lasers, domestic thiab txawv teb chaws kev tshawb fawb thiab daim ntawv thov ntawm laser ntxuav tshuab maj mam nce, tsom rau saum npoo ntawm cov ntaub ntawv hlau, kev siv txawv teb chaws yog aircraft fuselage xim tshem tawm, pwm nto degreasing, cav nrog cov pa roj carbon tshem tawm thiab ntxuav cov pob qij txha ua ntej vuam. Teb Chaws Asmeskas Edison Welding Institute laser ntxuav ntawm FG16 warplane, thaum lub zog laser ntawm 1 kW, lub ntim tu ntawm 2.36 cm3 ib feeb.
Nws yog ib qho tsim nyog hais tias kev tshawb fawb thiab kev siv cov xim laser tshem tawm cov khoom sib xyaw ua ke kuj yog qhov chaw kub kub. Lub US Navy HG53, HG56 nyoob hoom qav taub hau hniav thiab F16 fighter dav hlau lub tiaj tus Tsov tus tw thiab lwm yam composite nto tau pom tau hais tias laser xim tshem tawm daim ntaub ntawv, thaum Tuam Tshoj cov ntaub ntawv sib xyaw nyob rau hauv daim ntawv thov dav hlau lig, yog li cov kev tshawb fawb no yog qhov pib hauv qhov khoob.
Tsis tas li ntawd, kev siv lub tshuab ntxuav laser rau CFRP kev sib xyaw ua ke ntawm qhov sib koom ua ntej gluing los txhim kho lub zog ntawm kev sib koom tes kuj yog ib qho ntawm cov kev tshawb fawb tam sim no. hloov lub tuam txhab laser mus rau Audi TT lub tsheb ntau lawm kab los muab fiber ntau laser tu cov cuab yeej los ntxuav qhov chaw ntawm lub teeb yuag aluminium alloy qhov rooj ncej oxide zaj duab xis. Rolls G Royce UK siv laser ntxuav los ntxuav oxide zaj duab xis ntawm qhov chaw ntawm titanium aero-engine Cheebtsam.
Laser tu tshuab tau tsim sai heev nyob rau hauv ob lub xyoos dhau los, txawm nws yog lub laser tu txheej txheem tsis thiab tu mechanism, ntxuav cov khoom tshawb fawb los yog daim ntawv thov kev tshawb fawb tau ua tau zoo. Laser ntxuav tshuab tom qab ntau qhov kev tshawb fawb theoretical, lub hom phiaj ntawm nws cov kev tshawb fawb yog tsis tu ncua rau kev siv cov kev tshawb fawb, thiab hauv kev siv cov txiaj ntsig tau zoo. Nyob rau hauv lub neej yav tom ntej, laser tu tshuab nyob rau hauv kev tiv thaiv ntawm kab lis kev cai relics thiab tej hauj lwm ntawm kos duab yuav siv ntau lug, thiab nws cov lag luam yog dav heev. Nrog rau txoj kev loj hlob ntawm kev tshawb fawb thiab thev naus laus zis, daim ntawv thov ntawm laser tu tshuab hauv kev lag luam tau dhau los ua qhov tseeb, thiab cov peev txheej ntawm daim ntawv thov tau dhau los ua ntau dua.
Maven laser automation tuam txhab tsom rau kev lag luam laser rau 14 xyoo, peb tshwj xeeb hauv laser npav, peb muaj tshuab txee laser tu tshuab, trolley rooj plaub laser tu tshuab, hnab ev ntawv laser tu tshuab thiab peb hauv ib lub tshuab ntxuav laser, ntxiv rau, peb kuj muaj. laser vuam tshuab, laser txiav tshuab thiab laser npav engraving tshuab, yog tias koj xav tau peb lub tshuab, koj tuaj yeem ua raws li peb thiab xav tiv tauj peb.
Post lub sij hawm: Nov-14-2022
