Laser txiav tshuab siv lub teeb pom kev zoo laser kom ua tiav cov khoom tshem tawm. Vim lub zog ceev ntawm lub laser, cov ntaub ntawv tuaj yeem yaj, vaporized, lossis tshem tawm tau zoo hauv thaj chaw me me.
Tom qab tsom, lub laser tsim ib txoj kab nqaim thiab muaj zog heev. Thaum nws hits lub workpiece nto, ib feem ntawm lub zog yog absorbed thiab hloov mus rau hauv tshav kub.
Rau cov ntaub ntawv ceramic, qhov nqus dej tob yog qhov ntiav heev (feem ntau tsuas yog ob peb micrometers). Qhov no txhais tau tias thaum tshav kub kub yog concentrated nyob ze ntawm qhov chaw, ua rau lub zos kub nce sai heev mus rau lub melting los yog vaporization point.
Raws li cov txheej txheem txuas ntxiv mus:
Cov khoom ntawm qhov chaw focal melts los yog vaporizes
Cov khoom nyob ib puag ncig yog cuam tshuam los ntawm thermal diffusion
Vapor expansion tsim ib qho micro-ejection nyhuv, tshem tawm cov khoom molten
Qhov no yog li cas laser txiav ua tiav qhov siab precision thiab huv si, tshwj xeeb tshaj yog rau cov ntaub ntawv nyuaj thiab nkig xws li ceramics.
Cov Cheebtsam tseem ceeb ntawm Laser Tej Tshuab
Ib tug raug laser txiav system muaj peb lub ntsiab:
1. Laser Source (Laser Generator)
Lub laser qhov chaw tsim cov nqaj thiab loj txiav txim siab ua haujlwm.
Rau ceramic laser txiav, feem ntau siv laser hom muaj xws li:
YAG lasers (nruam lossis siab -frequency pulsed)
CO₂ lasers
QCW fiber ntau lasers (nrov nrov)
Nrog kev txhim kho thev naus laus zis tsis tu ncua, QCW fiber ntau lasers tau maj mam hloov cov tsoos YAG lasers vim:
Lub zog siab dua
Txo cov cua kub nkag
Zoo dua efficiency thiab stability
2. Optical System
Lub tshuab kho qhov muag xa thiab tsom mus rau lub teeb laser.
Nws feem ntau suav nrog:
Daim iav
Lens
Nozzles
Nws lub luag haujlwm yog los hloov cov kab hluav taws xob sib txuas mus rau hauv qhov chaw tsom mus rau qhov zoo, ua kom ruaj khov txiav zoo.
3. Worktable / Motion System
Lub rooj ua haujlwm muab ntau-axis txav, tso cai rau qhov tseeb thiab ua haujlwm ntawm cov khoom ua haujlwm.
Ua ke nrog CNC tswj, nws enables:
Txoj kev nyuaj txiav
Siab repeatability
Micron-qib qhov chaw
Cov ntsiab lus tseem ceeb cuam tshuam rau kev ua haujlwm laser
Hauv ceramic thiab hlau laser txiav, kev ua haujlwm zoo nyob ntawm ntau yam:
Laser wavelength thiab mem tes hom
Beam puab thiab focal txoj hauj lwm
Cov khoom muaj pes tsawg leeg thiab qhov chaw nyob
Pub tus nqi thiab ua txoj kev
Nozzle txoj hauj lwm thiab pab tej yam kev mob
Ua tib zoo tswj xyuas lub zog ntawm lub zog laser, lub sij hawm raug, thiab txoj hauj lwm ua kom pom tseeb yog qhov tseem ceeb rau kev ua tiav qhov ruaj khov thiab siab - cov txiaj ntsig zoo.
Material Properties thiab Laser Processing Performance
Cov khoom siv thermal ua lub luag haujlwm tseem ceeb hauv kev ua laser.
Piv txwv li:
Tungsten → siab melting point
Tooj liab → high thermal conductivity
Ob leeg suav hais tias nyuaj -rau- cov ntaub ntawv txheej txheem, zoo ib yam li ntau cov ceramics siab heev.
NY Tus Nqi: Qhov Ntsuas Yooj Yim ntawm Machinability
Ib qho kev siv feem ntau los ntsuas qhov nyuaj ntawm kev ua laser yog:
NY=Tₘ × λ
Qhov twg:
Tₘ=melting point (K)
λ=thermal conductivity (W·m⁻¹·K⁻¹)
Tsawg tus nqi NY=yooj yim rau kev ua
Cov khoom sib piv
Ntawm cov khoom siv ceramic:
ZrO₂ (zirconia) qhia qhov zoo tshaj plaws machinability
Nws qhov kev tshem tawm kev ua tau zoo tuaj yeem dhau 3 × siab dua Si₃N₄
Daim ntawv thov ntawm Laser txiav rau Advanced Materials
Yuchang Laser cov tshuab tau dav siv rau kev ua tiav ntawm ntau yam ntaub ntawv, suav nrog:
Tungsten ntawv
tooj liab substrate
Hlau
Silicon carbide (SiC)
Alumina (Al₂O₃)
Silicon nitride (Si₃N₄)
Zirconia (ZrO₂)
Cov ntaub ntawv no feem ntau siv hauv:
Electronics
Semiconductors
Advanced ceramics
Industrial Cheebtsam
Saib peb cov yeeb yaj kiab ua
Peb niaj hnub muab cov ntaub ntawv ua tiav tiag tiag thiab cov txiaj ntsig ua piv txwv:
-----YouTube:https://youtube.com/@yclaser
------ TikTok:https://vt.tiktok.com/ZSuUavXEw/
Kev Pabcuam & Kev Pabcuam
Ntxiv nrog rau kev tsim khoom, peb kuj muab:
Qauv ua
Txheej txheem validation
Kev pab txhawb nqa
Yog hais tias koj muaj laser txiav los yog ceramic ua yuav tsum tau, thov hu rau peb.
Peb npaj txhij los txhawb koj cov haujlwm nrog cov kev daws teeb meem txhim khu kev qha thiab zoo ib yam.
