Graphite yog ib yam khoom siv uas tsis yog hlau, dub, nrog rau qhov kub thiab txias siab thiab qis, hluav taws xob zoo thiab thermal conductivity, lubricity zoo thiab cov yam ntxwv tshuaj ruaj khov; conductivity hluav taws xob zoo, tuaj yeem siv ua electrode hauv EDM. Piv nrog cov electrodes tooj liab ib txwm muaj, graphite muaj ntau yam zoo xws li kev tiv taus kub siab, kev siv hluav taws xob tsawg, thiab kev hloov pauv thermal me me. Nws qhia tau tias muaj kev hloov pauv zoo dua hauv kev ua cov khoom siv precision thiab cov khoom nyuaj thiab cov electrodes loj. Nws tau hloov maj mam hloov cov electrodes tooj liab ua hluav taws xob hluav taws xob. Lub ntsiab lus ntawm machining electrodes [1]. Tsis tas li ntawd, graphite hnav-resistant cov ntaub ntawv tuaj yeem siv rau hauv qab kev kub ceev, kub siab, thiab siab siab yam tsis muaj roj lubricating. Ntau yam khoom siv dav siv graphite khoom piston khob, foob thiab bearings.
Tam sim no, cov ntaub ntawv graphite siv dav hauv cov teb ntawm tshuab, metallurgy, tshuaj lom neeg, kev tiv thaiv lub teb chaws thiab lwm yam teb. Muaj ntau hom graphite qhov chaw, cov qauv ntawm qhov chaw nyuaj, qhov tseeb ntawm qhov ntev thiab qhov zoo ntawm qhov chaw. Kev tshawb fawb hauv tsev txog kev ua graphite tsis tob txaus. Cov cuab yeej ua graphite hauv tsev kuj tseem tsawg heev. Kev ua graphite txawv teb chaws feem ntau siv cov chaw ua graphite rau kev ua haujlwm ceev ceev, uas tam sim no tau dhau los ua qhov kev coj ua tseem ceeb ntawm kev ua graphite.
Tsab xov xwm no feem ntau tshuaj xyuas cov thev naus laus zis graphite machining thiab cov cuab yeej ua tshuab los ntawm cov hauv qab no.
①Kev tshuaj xyuas ntawm kev ua haujlwm ntawm graphite;
② Feem ntau siv cov txheej txheem ua graphite;
③ Cov cuab yeej siv thiab cov txheej txheem txiav feem ntau hauv kev ua graphite;
Kev tshuaj xyuas kev ua tau zoo ntawm kev txiav graphite
Graphite yog ib yam khoom tawg yooj yim uas muaj cov qauv sib txawv. Kev txiav graphite yog ua tiav los ntawm kev tsim cov khoom me me lossis hmoov tsis sib xws los ntawm kev tawg yooj yim ntawm cov khoom graphite. Hais txog cov txheej txheem txiav ntawm cov khoom graphite, cov kws tshawb fawb hauv tsev thiab txawv teb chaws tau ua ntau txoj kev tshawb fawb. Cov kws tshawb fawb txawv teb chaws ntseeg tias cov txheej txheem tsim graphite chip yog roughly thaum ntug txiav ntawm lub cuab yeej sib cuag nrog cov khoom ua haujlwm, thiab lub hau ntawm lub cuab yeej raug tsoo, tsim cov chips me me thiab cov qhov me me, thiab Ib qho tawg yog tsim, uas yuav nthuav mus rau pem hauv ntej thiab hauv qab ntawm lub hau cuab yeej, tsim lub qhov tawg, thiab ib feem ntawm cov khoom ua haujlwm yuav tawg vim yog kev nce qib ntawm cov cuab yeej, tsim cov chips. Cov kws tshawb fawb hauv tsev ntseeg tias cov khoom graphite zoo heev, thiab ntug txiav ntawm lub cuab yeej muaj lub qhov loj, yog li lub luag haujlwm ntawm ntug txiav zoo ib yam li extrusion. Cov khoom graphite hauv thaj chaw sib cuag ntawm lub cuab yeej - cov khoom ua haujlwm raug nias los ntawm lub ntsej muag rake thiab lub hau ntawm lub cuab yeej. Hauv qab kev siab, brittle fracture yog tsim, yog li tsim cov chips chipping [3].
Thaum lub sijhawm txiav graphite, vim muaj kev hloov pauv ntawm kev txiav ntawm cov ces kaum puag ncig lossis cov ces kaum ntawm cov khoom ua haujlwm, kev hloov pauv ntawm kev nrawm ntawm lub cuab yeej tshuab, kev hloov pauv ntawm kev coj thiab lub kaum sab xis ntawm kev txiav rau hauv thiab tawm ntawm lub cuab yeej, kev co ntawm kev txiav, thiab lwm yam, qee qhov kev cuam tshuam tshwm sim rau cov khoom ua haujlwm graphite, ua rau ntug ntawm cov khoom graphite. Ces kaum brittleness thiab chipping, hnav cov cuab yeej hnyav thiab lwm yam teeb meem. Tshwj xeeb tshaj yog thaum ua cov ces kaum thiab cov khoom graphite nyias thiab nqaim-ribbed, nws yuav ua rau cov ces kaum thiab chipping ntawm cov khoom ua haujlwm, uas kuj tau dhau los ua qhov nyuaj hauv kev ua graphite.
Cov txheej txheem txiav graphite 
Cov txheej txheem ua haujlwm ib txwm muaj ntawm cov khoom siv graphite suav nrog kev tig, milling, sib tsoo, sawing, thiab lwm yam, tab sis lawv tsuas tuaj yeem paub txog kev ua cov khoom graphite nrog cov duab yooj yim thiab qhov tsis tshua muaj qhov tseeb. Nrog rau kev txhim kho sai thiab kev siv cov chaw ua haujlwm graphite high-speed, cov cuab yeej txiav, thiab cov thev naus laus zis txhawb nqa, cov txheej txheem ua haujlwm ib txwm muaj no tau maj mam hloov los ntawm cov thev naus laus zis machining ceev. Kev xyaum tau qhia tias: vim yog cov yam ntxwv tawv thiab brittle ntawm graphite, kev hnav cov cuab yeej hnyav dua thaum lub sijhawm ua tiav, yog li ntawd, nws raug pom zoo kom siv cov cuab yeej carbide lossis pob zeb diamond coated.
Kev ntsuas cov txheej txheem txiav
Vim yog qhov tshwj xeeb ntawm graphite, txhawm rau kom ua tiav cov txheej txheem zoo ntawm graphite qhov chaw, cov txheej txheem txheej txheem yuav tsum tau ua kom ntseeg tau. Thaum roughing cov khoom graphite, lub cuab yeej tuaj yeem pub ncaj qha rau ntawm qhov workpiece, siv cov txheej txheem txiav loj; txhawm rau kom tsis txhob chipping thaum ua tiav, cov cuab yeej uas muaj kev tiv thaiv zoo feem ntau siv los txo qhov txiav ntawm lub cuab yeej, thiab Xyuas kom meej tias qhov pitch ntawm lub cuab yeej txiav tsawg dua 1/2 ntawm txoj kab uas hla ntawm lub cuab yeej, thiab ua cov txheej txheem txheej txheem xws li kev ua qeeb qeeb thaum ua tiav ob qho kawg [4].
Nws tseem yog qhov tsim nyog los npaj txoj kev txiav kom zoo thaum txiav. Thaum ua cov duab puab sab hauv, cov duab ib puag ncig yuav tsum tau siv ntau li ntau tau los txiav qhov quab yuam ntawm qhov txiav kom ib txwm tuab dua thiab muaj zog dua, thiab tiv thaiv cov khoom ua haujlwm kom tsis txhob tawg [5]. Thaum ua cov dav hlau lossis cov grooves, xaiv cov khoom noj diagonal lossis spiral ntau li ntau tau; zam cov kob ntawm qhov chaw ua haujlwm ntawm qhov, thiab zam kev txiav cov khoom ua haujlwm ntawm qhov chaw ua haujlwm.
Tsis tas li ntawd xwb, txoj kev txiav kuj yog ib qho tseem ceeb uas cuam tshuam rau kev txiav graphite. Kev co ntawm kev txiav thaum lub sijhawm milling down yog tsawg dua li ntawm kev milling up. Lub tuab ntawm kev txiav ntawm lub cuab yeej thaum lub sijhawm milling down raug txo los ntawm qhov siab tshaj plaws mus rau xoom, thiab yuav tsis muaj qhov tshwm sim bouncing tom qab lub cuab yeej txiav rau hauv qhov workpiece. Yog li ntawd, kev milling down feem ntau yog xaiv rau kev ua graphite.
Thaum ua cov graphite workpieces nrog cov qauv nyuaj, ntxiv rau kev ua kom zoo dua cov txheej txheem ua raws li cov kev xav saum toj no, qee qhov kev ntsuas tshwj xeeb yuav tsum tau ua raws li cov xwm txheej tshwj xeeb kom ua tiav cov txiaj ntsig zoo tshaj plaws.
Lub sijhawm tshaj tawm: Lub Ob Hlis-20-2021