Hauv kev siv cov tshuab cim picosecond-level laser, qhov tseeb yog qhov tseem ceeb rau kev ntsuam xyuas kev ua tau zoo ntawm cov khoom siv. Lub hauv paus, ua tus nqa khoom tseem ceeb rau lub tshuab laser thiab cov khoom siv precision, nws cov khoom siv cuam tshuam ncaj qha rau kev ruaj khov ntawm kev ua tiav. Granite thiab cam khwb cia hlau, ua ob yam khoom siv tseem ceeb, muaj qhov sib txawv tseem ceeb hauv cov yam ntxwv ntawm kev ua kom raug thaum lub sijhawm ua tiav picosecond-level ultra-fine. Tsab xov xwm no yuav tshuaj xyuas qhov zoo thiab qhov tsis zoo ntawm ob qho tib si los muab lub hauv paus kev tshawb fawb rau kev txhim kho cov khoom siv.
Cov khoom siv txiav txim siab lub hauv paus ntawm kev ua kom raug
Granite yog ib lub pob zeb igneous uas tsim los ntawm cov txheej txheem geological ntau pua lab xyoo. Nws cov qauv siv lead ua sab hauv yog ntom thiab sib xws, nrog rau qhov coefficient nthuav dav linear qis li 0.5-8 × 10⁻⁶ / ℃, sib piv rau cov hlau alloys precision xws li indium steel. Cov yam ntxwv no ua rau nws qhov kev hloov pauv loj yuav luag tsis tseem ceeb thaum qhov kub thiab txias hloov pauv, zoo zam kev cuam tshuam ntawm txoj kev pom thiab cov yuam kev kho tshuab los ntawm kev nthuav dav thermal thiab kev cog lus. Tsis tas li ntawd, qhov ceev ntawm granite yog siab li 2.6-2.8g / cm³, uas muaj peev xwm nqus tau kev co zoo heev. Nws tuaj yeem ua kom sai sai cov kev co siab uas tsim thaum lub sijhawm ua laser, ua kom ntseeg tau tias lub kaw lus pom thiab cov khoom txav mus los ruaj khov.
Cov hlau cam khwb cia yog siv dav vim lawv qhov kev ua tau zoo heev thiab cov nqi zoo. Cov qauv graphite flake feem ntau ntawm cov hlau cam khwb cia grey muab nws nrog qee qhov kev ua haujlwm damping, uas tuaj yeem nqus tau li 30% txog 50% ntawm lub zog co. Txawm li cas los xij, qhov coefficient ntawm thermal expansion ntawm hlau cam khwb cia yog kwv yees li 10-12 × 10⁻⁶ / ℃, uas yog 2-3 npaug ntawm granite. Nyob rau hauv kev sib sau ua ke ntawm cua sov tsim los ntawm kev ua haujlwm ntev mus tas li, qhov kev hloov pauv ntawm qhov ntev yog qhov tshwm sim. Lub caij no, muaj kev ntxhov siab casting hauv cov hlau cam khwb cia. Raws li kev ntxhov siab raug tso tawm thaum lub sijhawm siv, nws yuav ua rau muaj kev hloov pauv tsis rov qab hauv qhov tiaj tus thiab perpendicularity ntawm lub hauv paus.
Lub tshuab ua kom raug qhov tseeb hauv kev ua cov txheej txheem picosecond
Kev ua haujlwm laser picosecond, nrog nws cov yam ntxwv luv luv ultra-luv, tuaj yeem ua tiav kev ua tiav zoo ntawm qib sub-micron lossis txawm tias qib nanometer, tab sis nws kuj tsim cov kev cai nruj rau kev ruaj khov ntawm cov khoom siv. Lub hauv paus granite, nrog nws cov qauv sab hauv ruaj khov, tuaj yeem tswj cov lus teb vibration ntawm qib sub-micron nyob rau hauv kev cuam tshuam laser zaus siab, ua kom zoo tswj qhov tseeb ntawm qhov chaw ntawm lub laser tsom. Cov ntaub ntawv ntsuas qhia tau hais tias lub tshuab cim laser nrog lub hauv paus granite tseem tswj tau qhov dav kab sib txawv hauv ± 0.5μm tom qab ua tiav 8-teev picosecond tas mus li.
Thaum lub hauv paus hlau cam khwb raug rau qhov kev co siab ntawm picosecond laser, cov qauv sab hauv yuav raug kev qaug zog me me vim muaj kev cuam tshuam tas mus li, ua rau lub hauv paus tsis khov kho. Cov ntaub ntawv soj ntsuam los ntawm ib lub tuam txhab tsim khoom semiconductor qhia tau tias tom qab rau lub hlis ntawm kev ua haujlwm, qhov ua tiav qhov tseeb ntawm cov khoom siv nrog cov hauv paus hlau cam khwb ncav cuag 12%, feem ntau yog qhia tias muaj kev nce ntxiv ntawm qhov roughness ntawm cov kab ntug thiab kev nthuav dav ntawm qhov yuam kev tso chaw. Lub caij no, hlau cam khwb yog qhov rhiab heev rau cov av noo ib puag ncig. Kev siv ntev yog qhov yooj yim xeb, ua rau qhov kev puas tsuaj ntawm qhov tseeb nce ntxiv.
Kev txheeb xyuas qhov sib txawv ntawm kev ua tau zoo hauv kev siv ua haujlwm
Hauv kev ua cov khoom siv hluav taws xob 3C, ib lub tuam txhab nto moo tau ua qhov kev sim sib piv ntawm kev ua haujlwm ntawm ob hom khoom siv. Hauv kev sim, ob lub tshuab cim picosecond laser nrog tib lub qauv tau nruab nrog granite thiab cam khwb cia hlau los txiav thiab cim lub iav ntawm cov ntxaij vab tshaus xov tooj ntawm tes nrog qhov dav ntawm 0.1 hli. Tom qab 200 teev ntawm kev ua tiav tas mus li, qhov ceev 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 qhov kawg tau pom tseeb sawtooth defects.
Hauv kev tsim cov khoom siv aerospace, cov ntaub ntawv saib xyuas ntev ntawm ib lub koom haum tshawb fawb qhia tau ntau yam txog qhov sib txawv: Lub tshuab laser cim nrog lub hauv paus granite muaj qhov sib sau ua ke ntawm qhov tseeb tsawg dua 3μm hauv tsib xyoos kev pabcuam; Txawm li cas los xij, tom qab peb xyoos, qhov yuam kev ua tiav ntawm cov khoom siv hlau cam khwb cia los ntawm kev hloov pauv ntawm lub hauv paus tau dhau qhov txheej txheem tus qauv ntawm ± 10μm, thiab tag nrho cov tshuab raug calibration yuav tsum tau ua.
Cov lus qhia rau kev txiav txim siab hloov kho dua tshiab
Yog tias cov lag luam siv cov txheej txheem ua haujlwm ruaj khov thiab ntev-lub voj voog ua lawv qhov kev xav tau tseem ceeb, tshwj xeeb tshaj yog hauv cov teb xws li cov chips semiconductor thiab cov khoom siv kho qhov muag precision, cov hauv paus granite, nrog lawv qhov kev ruaj khov thermal zoo heev thiab kev tiv thaiv kev co, yog qhov kev xaiv zoo tshaj plaws. Txawm hais tias nws cov nqi yuav khoom pib yog 30% txog 50% siab dua li cov hlau cam khwb cia, los ntawm qhov kev xav ntawm tus nqi tag nrho lub neej voj voog, qhov txo qis ntawm kev ntsuas qhov tseeb thiab cov khoom siv tsis ua haujlwm rau kev saib xyuas tuaj yeem txhim kho cov txiaj ntsig tag nrho. Rau cov xwm txheej thov nrog cov kev cai ua haujlwm tsawg thiab cov peev nyiaj tsawg, cov hauv paus hlau cam khwb cia tseem tuaj yeem siv ua kev daws teeb meem hloov pauv raws li lub hauv paus ntawm kev tswj hwm qhov chaw siv.
Los ntawm kev sib piv cov yam ntxwv ntawm kev txo qhov tseeb ntawm granite thiab cam khwb cia hlau hauv kev ua picosecond-level, nws tuaj yeem pom tias kev xaiv cov khoom siv hauv paus tsim nyog yog ib kauj ruam tseem ceeb los txhim kho qhov tseeb ntawm kev ua tiav thiab kev ntseeg siab ntawm lub tshuab cim laser. Cov lag luam yuav tsum, raws li lawv tus kheej cov kev xav tau thev naus laus zis thiab kev txiav txim siab txog tus nqi, txiav txim siab txog kev tshawb fawb ntawm txoj kev npaj txhim kho hauv paus kom muab lub hauv paus khoom siv ruaj khov rau kev tsim khoom siab.
Lub sijhawm tshaj tawm: Tsib Hlis-22-2025