Thaum tham txog cov geometry ntawm kev txiav inserts, feem ntau cov tuam txhab lag luam tam sim ntawd pib los ntawm kev piav qhia txog macroscopic geometry (lub cev duab) ntawm qhov ntxig. Txawm li cas los xij, thaj chaw tshawb fawb loj hlob sai nyob rau xyoo tas los no - qhov kev ua kom zoo ntawm microscopic geometry ntawm qhov ntxig qhov txiav ntug - tsim nyog tau txais kev saib xyuas zoo.
Ntawm qib macroscopic, ntxig geometry optimization feem ntau cuam tshuam nrog cov duab zoo tshaj plaws rau kev ua tiav nti tswj. Nyob ntawm cov khoom siv ua haujlwm thiab cov txheej txheem machining, cov duab ntxig sib txawv thiab cov ces kaum tuaj yeem muab cov txiaj ntsig zoo hauv nti tawg thiab nti tshem tawm ntawm thaj chaw txiav. Tus tsim thiab optimization ntawm macroscopic geometry ntawm inserts yog ib tug ncaj kev paub tab, mastered los ntawm feem ntau loj manufacturers.
Txog rau xyoo tsis ntev los no, kev txhim kho thev naus laus zis tau ua rau muaj kev tswj hwm ntawm qhov ntxig lub microscopic geometry. Siv cov txheej txheem machining siab heev, ncig, elliptical, los yog angled txiav npoo tuaj yeem tsim rau ntawm qhov txiav ntawm qhov ntxig, thiab feeb chamfers lossis grooves tuaj yeem nkag mus rau hauv qhov txiav. Nrog rau daim ntawv thov ntawm ntau yam tshiab technologies, nws muaj peev xwm mus passivate thiab ntsuas inserts ntawm ib tug microscale, yog li zoo heev txhim kho insert lub neej thiab machining stability. Nws yog qhov tseeb heev tias yav tom ntej kev txhim kho thev naus laus zis yuav txhawb nqa kev txhim kho ntawm daim teb no thiab ua tiav cov txiaj ntsig tseem ceeb dua.
Ceramic Insert Technology
Txawm hais tias feem ntau ntawm cov khoom siv txiav yog ua los ntawm cov cemented carbide, cov khoom ntxig ua los ntawm lwm cov ntaub ntawv muaj ntau zuj zus. Ntawm cov no, ceramic inserts yog kab tias feem ntau uas tsis yog -carbide inserts. Nrog rau kev siv hluav taws xob ntau ntxiv - cov hlau tsis muaj zog (xws li Inconel alloys) hauv aerospace thiab lwm yam khoom siv hauv kev lag luam, ceramic inserts tau ua kom pom kev ua haujlwm zoo tshaj plaws hauv kev ua haujlwm nyuaj no - rau - cov khoom siv tshuab.
Kev tsim cov txheej txheem ntawm ceramic inserts yog zoo ib yam li cov cemented carbide inserts. Vim tias cov ceramics tsis yooj yim sib txuas nrog lwm cov ntaub ntawv, qhov kub thiab txias ntau dua yuav tsum tau siv thaum sintering.
Feem ntau, kev siv silicon carbide (SiC) whiskers hauv ceramic inserts nce lawv lub zog. Cov fibers zoo no tuaj yeem ua haujlwm zoo ib yam li steel reinforcement hauv pob zeb. Yav dhau los, kev txhawb zog ntawm kev ntxiv SiC rau cov ceramics kuj yog me me, tab sis tsis ntev los no kev siv thev naus laus zis tau hloov pauv qhov no. Cov txheej txheem tshiab tso cai rau SiC whiskers tau taw qhia hauv cov lus qhia tshwj xeeb, ua kom muaj txiaj ntsig zoo. Piv nrog rau lwm cov ntaub ntawv ntxig, ceramics yog nkig thiab ua rau muaj qhov tsis xws luag. Kev sib xyaw ua ke ntawm SiC whiskers tuaj yeem ua rau qeeb qeeb ntawm cov txheej txheem tsis ua haujlwm ntawm cov cuab yeej ceramic, vim tias cov microcracks hauv cov cuab yeej xav tau lub zog ntau dua los nkag mus rau hauv cov pob zeb zoo nkauj. Nrog rau kev txhim kho txuas ntxiv ntawm cov thev naus laus zis no thiab lwm cov thev naus laus zis zoo sib xws, cov cuab yeej txiav ceramic yuav dhau los ua cov kev daws teeb meem tsim nyog rau ntau yam ntawm cov txheej txheem machining.
