Nyob rau hauv lub tshav pob ntawm picosecond-theem laser npav tshuab, precision yog qhov tseem ceeb qhia rau kev soj ntsuam cov kev ua tau zoo ntawm cov cuab yeej. Lub hauv paus, raws li tus neeg nqa khoom tseem ceeb rau lub laser system thiab precision Cheebtsam, nws cov khoom ncaj qha cuam tshuam rau kev ruaj ntseg ntawm kev ua haujlwm raug. Granite thiab cam khwb cia hlau, raws li ob lub hauv paus ntaub ntawv tseem ceeb, muaj qhov sib txawv tseem ceeb hauv cov yam ntxwv ntawm kev ua kom zoo thaum lub sij hawm picosecond-theem ultra-fine ua. Kab lus no yuav tshawb xyuas qhov kev ua tau zoo thiab qhov tsis zoo ntawm ob qho los muab kev tshawb fawb hauv paus rau kev kho dua tshiab. cov
Cov khoom siv txiav txim siab lub hauv paus ntawm precision
Granite yog qhov tseem ceeb ntawm cov pob zeb uas tsis muaj zog uas tsim los ntawm cov txheej txheem geological ntau pua lab xyoo. Nws cov qauv siv crystal sab hauv yog ntom thiab hnav khaub ncaws, nrog cov ntaub ntawv nthuav dav, nrog rau cov ntaub ntawv nthuav tawm tsawg li 0.5-8 × 10 / piv rau cov khoom siv tsis zoo xws li cov hlau steel. Cov yam ntxwv no ua rau nws qhov kev hloov pauv yuav luag tsis pom zoo thaum qhov ntsuas kub nyob ib puag ncig hloov pauv, ua kom tsis txhob muaj kev kho qhov muag offset thiab cov khoom siv tsis raug los ntawm thermal expansion thiab contraction. Tsis tas li ntawd, qhov ntom ntawm granite yog siab li 2.6-2.8g / cm³, uas ib txwm muaj peev xwm nqus tau zoo heev. Nws tuaj yeem ua kom nrawm nrawm ntawm qhov kev vibrations siab tau tsim thaum lub sijhawm ua haujlwm laser, ua kom muaj kev ruaj ntseg ntawm qhov kho qhov muag thiab txav qhov chaw. cov
Cam khwb cia hlau puag yog dav siv vim lawv zoo heev casting kev ua tau zoo thiab tus nqi zoo. Cov qauv flake graphite raug ntawm grey cam khwb cia hlau endows nws nrog qee yam kev ua haujlwm damping, uas tuaj yeem nqus tau li 30% txog 50% ntawm lub zog vibration. Txawm li cas los xij, cov coefficient ntawm thermal expansion ntawm cam khwb cia hlau yog kwv yees li 10-12 × 10⁻⁶ / ℃, uas yog 2-3 npaug ntawm granite. Nyob rau hauv lub tsub zuj zuj ntawm cov cua sov generated los ntawm lub sij hawm ntev ua tsis tu ncua, seem deformation yog nquag tshwm sim. Meanwhile, muaj kev ntxhov siab nyob rau hauv lub cam khwb cia hlau. Raws li kev ntxhov siab raug tso tawm thaum lub sij hawm siv cov txheej txheem, nws yuav ua rau irreversible hloov nyob rau hauv lub flatness thiab perpendicularity ntawm lub hauv paus. cov
Lub precision attenuation mechanism nyob rau hauv picosecond-theem ua
Picosecond laser ua, nrog rau nws cov yam ntxwv ultra-luv luv mem tes, tuaj yeem ua tiav kev ua haujlwm zoo ntawm qib sub-micron lossis txawm tias qib nanometer, tab sis nws kuj tseem tsim nyog rau kev ruaj ntseg ntawm cov khoom siv. Lub hauv paus granite, nrog nws cov qauv ruaj khov, tuaj yeem tswj tau qhov kev vibration teb ntawm sub-micron qib nyob rau hauv high-frequency laser cuam tshuam, zoo tswj qhov chaw qhov tseeb ntawm lub laser tsom. Cov ntaub ntawv ntsuas qhia tau hais tias lub laser npav tshuab nrog lub hauv paus granite tseem tuav cov kab dav sib txawv hauv ± 0.5μm tom qab ua tiav 8-teev picosecond. cov
Thaum cov cam khwb cia hlau puag yog raug rau lub high-frequency vibration ntawm picosecond laser, lub sab hauv grain qauv yuav undergo microscopic qaug zog vim tsis tu ncua cuam tshuam, ua rau ib tug txo nyob rau hauv lub rigidity ntawm lub hauv paus. Kev soj ntsuam cov ntaub ntawv los ntawm qee qhov chaw tsim khoom lag luam semiconductor qhia tau hais tias tom qab 6 lub hlis ntawm kev ua haujlwm, kev ua haujlwm raug attenuation tus nqi ntawm cov khoom siv nrog cov cam khwb cia hlau mus txog 12%, feem ntau tshwm sim raws li qhov nce hauv qhov roughness ntawm kab npoo thiab nthuav dav ntawm qhov yuam kev. Meanwhile, cam khwb cia hlau yog rhiab heev rau ib puag ncig humidity. Kev siv mus sij hawm ntev yog qhov ua rau xeb, ntxiv rau kev ua kom lub cev tsis zoo ntawm qhov tseeb. cov
Kev txheeb xyuas qhov sib txawv ntawm kev ua tau zoo hauv kev siv tswv yim
Hauv kev ua haujlwm ntawm 3C hluav taws xob precision tivthaiv, lub tuam txhab paub zoo tau ua qhov kev sib piv ntawm cov cuab yeej ua haujlwm ntawm ob hom khoom siv. Hauv kev sim, ob lub picosecond laser npav tshuab nrog tib lub teeb tsa tau nruab nrog granite thiab cam khwb cia hlau hauv paus txiav thiab kos lub iav ntawm cov xov tooj ntawm tes nrog qhov dav ntawm 0.1mm. Tom qab 200 teev ntawm kev ua haujlwm tas mus li, qhov kev tuav pov hwm ntawm kev ua tiav ntawm cov khoom siv granite yog 98.7%, thaum cov khoom siv hlau cam khwb cia tsuas yog 86.3%. Cov npoo ntawm cov iav ua tiav los ntawm yav tas los pom pom pom pom pom qhov tsis xws luag. cov
Nyob rau hauv kev tsim khoom ntawm aerospace Cheebtsam, lub sij hawm ntev xyuas cov ntaub ntawv ntawm ib tug tej yam kev tshawb fawb lub koom haum ntau intuitively qhia txog qhov sib txawv: lub laser npav tshuab nrog ib tug granite puag muaj ib tug cumulative precision attenuation tsawg tshaj li 3μm nyob rau hauv ib tug tsib-xyoo kev pab cuam lub neej; Txawm li cas los xij, tom qab peb xyoos, kev ua haujlwm yuam kev ntawm cov khoom siv hlau cam khwb cia los ntawm kev deformation ntawm lub hauv paus tau dhau tus txheej txheem ntawm ± 10μm, thiab tag nrho cov tshuab raug calibration yuav tsum tau ua. cov
Cov lus pom zoo rau kev hloov kho cov kev txiav txim siab
Yog tias cov tuam txhab siv cov khoom siv high-precision thiab lub voj voog ntev ua haujlwm ruaj khov raws li lawv cov kev xav tau, tshwj xeeb tshaj yog nyob rau hauv cov teb xws li semiconductor chips thiab precision optical Cheebtsam, granite bases, nrog lawv zoo thermal stability thiab kev co kuj, yog ib qho zoo tagnrho upgrade xaiv. Txawm hais tias nws tus nqi pib yuav khoom yog 30% mus rau 50% siab dua li cov hlau cam khwb cia, los ntawm qhov kev xav ntawm tag nrho cov nqi ntawm lub neej, qhov txo qis ntawm kev ntsuas qhov tseeb thiab cov khoom siv downtime rau kev saib xyuas tuaj yeem txhim kho cov txiaj ntsig tag nrho. Rau daim ntawv thov scenarios nrog cov kev ua haujlwm tsawg tsawg thiab cov peev nyiaj tsawg, cov cam khwb cia hlau tseem tuaj yeem siv los ua cov kev hloov pauv hloov raws li qhov tsim nyog ntawm kev tswj hwm kev siv ib puag ncig. cov
Los ntawm kev sib piv qhov tseeb attenuation yam ntxwv ntawm granite thiab cam khwb cia hlau hauv picosecond-theem ua, nws tuaj yeem pom tau tias xaiv cov khoom siv hauv paus tsim nyog yog cov kauj ruam tseem ceeb los txhim kho qhov kev ua tiav thiab kev ntseeg siab ntawm lub tshuab laser npav. Cov tuam txhab lag luam yuav tsum, nyob rau hauv lub teeb ntawm lawv tus kheej cov kev cai thev naus laus zis thiab kev txiav txim siab tus nqi, txiav txim siab txog kev tshawb fawb ntawm lub hauv paus kev txhim kho txoj kev npaj los muab cov khoom siv hauv paus rau kev tsim khoom siab. cov
Post lub sij hawm: May-22-2025