01
Taw qhia rau kab lus no
Ultrafast laser thev naus laus zis yog cov thev naus laus zis thev naus laus zis uas ua kom muaj siab - siv lub teeb pulses nyob rau lub sijhawm luv luv, thiab nws cov ntawv thov hauv thaj chaw aerospace tau nce ntau ntxiv. Cov thev naus laus zis no muaj npe nrov rau nws qhov kev ua tau zoo tshaj plaws hauv kev ntsuas, kev tsim khoom, thiab kev sib txuas lus, thiab nws cov ntawv thov dav hauv aerospace engineering muab cov peev txheej tshiab rau kev txhim kho dav hlau kev ua haujlwm thiab kev nyab xeeb.
Ultrafast lasers feem ntau xa mus rau lasers nrog mem tes dav tsawg dua 10^-12 vib nas this, feem ntau suav nrog femtosecond lasers (1 fs=10^-15 s) thiab picosecond lasers (1 ps=10^-12 s). Vim tias ultrafast laser pulses ua rau lub sijhawm luv luv, lawv tuaj yeem tsim lub zog siab siab heev. Yog li ntawd, tsis zoo li cov txheej txheem laser uas ua rau cov khoom siv los ntawm cov teebmeem photothermal, cov txheej txheem ua haujlwm ntawm ultrafast lasers yog ncaj qha hluav taws xob hauv lub xeev nqus, uas hloov lub zog rau cov khoom siv lattice, rhuav tshem nws cov ntawv cog lus, thiab thaum kawg ejects nws li ntshav. Ntxiv mus, tsis zoo li cov thermal ua ntawm zoo tib yam nruam lasers, ultrafast laser ua dlhos ntau nrog ib tug "txias ua" txoj kev. Los ntawm qhov kev xav ntawm kev sib cuam tshuam mechanism ntawm lub laser thiab cov khoom, femtosecond laser ua tiav high precision, tsawg tshav kub-cuam tshuam cheeb tsam, tsis thermal melting, tsis recast txheej, thiab tsis muaj microcracks. Nws yog ib txoj hauv kev zoo tshaj plaws los txhim kho qhov kev ncaj ncees ntawm cov turbine hniav zaj duab xis-txias qhov tsim hauv aviation xyaw.
02 Daim Ntawv Thov Tshwj Xeeb (1) Gas Film Hole Machining of Aeroengine Turbine Blades
Raws li lub hauv paus tseem ceeb ntawm lub tshuab aeroengine, kev tsim, kev tsim khoom zoo, thiab kev ua haujlwm ntawm turbine blades cuam tshuam rau lub cav lub neej kev pab cuam. Feem ntau, thermal barrier coatings yog siv rau saum npoo ntawm siab - kub alloys kom muab cov hniav siab toughness, siab plasticity, corrosion kuj, thiab siab - kub kuj. Tsis tas li ntawd, cov khoom siv roj av lub qhov yog tsim rau ntawm qhov chaw. Los ntawm kev tso cua txias los ntawm sab hauv cov khoom, thiab tsim cov cua ntws los ntawm cov qhov me me, tiv thaiv cov cua txias zaj duab xis rau saum npoo, cais cov roj kub thiab tiv thaiv cov khoom tiv thaiv. Txawm li cas los xij, cov txheej txheem ua tam sim no, xws li kev siv hluav taws xob tawm tshuab thiab ntev -pulse laser machining, muaj qhov tsis zoo, suav nrog cov txheej txheem uas tsis yog- conductive thermal barrier txheej, txheej delamination, tawg, thiab txheej txheej chipping, ua rau nws nyuaj rau tsim kom zoo- tsim qhov me me.
Nrog rau txoj kev loj hlob ntawm ultrafast laser ua tshuab, femtosecond lasers tau tam sim no tau siv los tsim cov roj qhov ntawm turbine hniav yam tsis muaj txheej delamination los yog tawg, thiab nrog rau qhov ntev raws li cov kev cai. Qhov no muab cov thev naus laus zis tshiab rau kev tsim cov yeeb yaj kiab roj qhov hauv aeroengine Cheebtsam.
Lub machining ntawm ntau cov roj zaj duab xis txias qhov ntawm thermal barrier -coated turbine hniav yog ib qho tseem ceeb rau daim ntawv thov ntawm siab thrust- mus rau - luj piv, siab - kev ua tau zoo cav, yog li teeb tsa cov kev xav tau ntau dua rau kev siv cov hniav coated no. Femtosecond laser micro-qhov kev siv tshuab, nrog nws qhov zoo ntawm kev ua haujlwm siab, siab zoo, thiab ua haujlwm txias, ua rau siab -zoo micro- qhov machining rau lub cav. Nrog rau kev txhim kho txuas ntxiv hauv femtosecond laser drilling tshuab, tam sim no muaj peev xwm ua tiav siab - precision machining ntawm cov pa zaj duab xis qhov ntawm thermal barrier-coated hniav yam tsis muaj re-cov txheej txheem melted, micro- tawg, los yog cua sov{13}} thaj chaw cuam tshuam, thaum ua kom cov txheej txheem ua kom tsis muaj xim dub. Yog li ntawd, femtosecond laser micro- qhov txheej txheem thev naus laus zis tau npaj los ua ib txoj hauv kev tseem ceeb rau kev tsim cov roj zaj duab xis qhov ntawm thermal barrier-coated turbine hniav.
(2) Machining ntawm zaj duab xis txias qhov nyob rau hauv lub combustion Chamber ntawm Aero Engines
Cov nplaim hluav taws yog ib feem tseem ceeb ntawm lub tshuab hluav taws xob aero combustion chamber thiab yog ib qho tseem ceeb tshaj plaws thaum tshav kub kub- tiv taus qhov chaw. Txhawm rau kom cov nplaim taws ua haujlwm ruaj khov thiab tsis tu ncua nyob rau hauv qhov kub siab heev - qhov kub thiab txias, nws yuav tsum tau txias. Tam sim no, ib txoj hauv kev muaj kev sib xyaw ua ke ntawm coatings thiab perforations. Siv ntev -mem tes laser machining tuaj yeem ua rau muaj qhov tsis xws luag xws li txheej ablation, txaws, thiab ntug chipping, uas cuam tshuam rau lub neej kev pab cuam ntawm cov nplaim taws. Tam sim no, siv picosecond laser machining tuaj yeem tsim cov yeeb yaj kiab txias qhov uas tsis muaj qhov loj - cheeb tsam delamination lossis flaking ntawm qhov chaw, thiab qhov ntev uas ua tau raws li cov kev cai, raws li qhia hauv daim duab 2 thiab 3.
(3) Machining ntawm Tshwj Xeeb -Shoed Grooves hauv Aero Cav
Sealing kev ua tau zoo muaj qhov cuam tshuam tseem ceeb rau kev ua haujlwm ntawm lub tshuab aero. Nyob rau hauv xyoo tas los no, nrog rau txoj kev loj hlob ntawm kev lag luam aviation, lub cav kev ua tau zoo tau txhim kho tsis tu ncua, thiab cov kev ua haujlwm tau nce zuj zus. Kev ua tsis tiav los ntawm lub cav foob malfunctions tau nce, thiab cov teeb meem no yuav tsum tau kho sai. Yog li ntawd, cov kev cai tshiab tau thov rau lub cav sealing tshuab. Cov ntiv tes ntiv tes yog ib yam tshiab ntawm cov cuab yeej siv tau rau kev sib khi lub ntsiab bearing chamber thiab airflow paths ntawm aero engines. Lub machining ntawm ntiv tes ntiv tes foob Cheebtsam yuav tsum tau siab precision. Tam sim no txhua yam machining, hluav taws xob tawm machining, thiab ntev -pulse laser machining tsis tuaj yeem daws teeb meem xws li warp thiab deformation generated thaum lub sij hawm ua. Txawm li cas los xij, femtosecond lasers, vim lawv lub zog loj heev thiab lub sijhawm ua haujlwm luv luv, ua kom muaj kev ua haujlwm siab thiab ua haujlwm siab hauv cov txheej txheem machining. Tsis muaj qhov tsis xws luag xws li cov txheej txheem rov ua dua, cov kab nrib pleb, lossis burrs tshwm sim ntawm cov ntiv tes ntiv tes foob, muab ib txoj hauv kev tshiab rau kev ua haujlwm tshwj xeeb - zoo li cov grooves hauv siab - precision aero engine qhov chaw.
03
Cov ntsiab lus thiab Outlook
Raws li cov khoom siv siab heev ua thiab kev siv tshuab, kev ua laser ultrafast muaj cov ntawv thov dav dav hauv kev lag luam aerospace engine manufacturing. Nyob rau hauv daim ntawv thov engineering ntawm ultrafast laser ua, cov txheej txheem laser sib txawv yuav tsum raug xaiv raws li cov yam ntxwv ntawm cov khoom siv los txo cov txheej txheem, txhim kho kev ua haujlwm zoo, thiab xyuas kom meej cov khoom tsim tau zoo thiab qhov ntev. Nrog rau txoj kev loj hlob ntawm ultrafast laser technology thiab kev txhim kho cov txheej txheem optimization, cov teeb meem xws li kev ua hauj lwm tsawg thiab tsawg machinable thickness yuav daws tau zoo. Ntxiv mus, dual-mem tes laser ua tshuab, uas ua ke ultrafast laser ua nrog ntev-mem tes laser ua, yuav yog yav tom ntej kev taw qhia rau kev txhim kho zoo thiab efficiency.
