Cov electrodes graphite muaj zog heev, los ntawm kev hloov cov electrodes tooj liab nrog cov electrodes graphite rau kev tsim pwm, ua rau lub voj voog tsim pwm luv dua, txhim kho kev ua haujlwm, thiab txo cov nqi tsim pwm. Nyob rau xyoo tas los no, nrog rau kev qhia txog cov pwm precision thiab cov pwm ua haujlwm siab (nrog rau lub voj voog pwm luv dua), cov neeg xav tau rau kev tsim pwm tau nce siab thiab siab dua. Vim muaj ntau yam kev txwv ntawm cov electrodes tooj liab lawv tus kheej, nws tau ua tsis tau raws li cov kev xav tau kev txhim kho ntawm kev lag luam pwm. Graphite, ua cov khoom siv EDM electrode, tau siv dav hauv kev lag luam pwm vim nws cov txiaj ntsig xws li kev siv tshuab siab, lub teeb yuag, tsim sai, tus nqi nthuav dav qis heev, poob qis thiab yooj yim hnav. Nws yog qhov tsis zam uas nws yuav hloov cov electrodes tooj liab.
1. Cov yam ntxwv ntawm cov khoom siv hluav taws xob graphite
CNC machining muaj cov yam ntxwv ua haujlwm ceev ceev, ua haujlwm tau zoo thiab yooj yim hnav. Qhov ua haujlwm ceev ntawm cov tshuab graphite yog 3 txog 5 npaug ntawm cov electrodes tooj liab, thiab qhov ua haujlwm ceev yog qhov tshwj xeeb tshaj yog. Ntxiv mus, nws lub zog siab heev. Rau cov electrodes ultra-siab (50 txog 90mm) thiab ultra-thin (0.2 txog 0.5mm), lawv tsis yooj yim rau deformation thaum lub sijhawm ua haujlwm. Ntxiv mus, feem ntau, cov khoom yuav tsum muaj cov qauv zoo heev. Qhov no yuav tsum tau ua thaum ua cov electrodes, lawv yuav tsum tau ua cov electrodes txiv neej sib xyaw ua ke li sai tau. Txawm li cas los xij, muaj ntau yam kev zais cia ces kaum thaum lub sijhawm tsim cov electrodes txiv neej sib xyaw. Vim yog qhov yooj yim trimming ntawm graphite, qhov teeb meem no tuaj yeem daws tau yooj yim thiab tus lej ntawm cov electrodes tuaj yeem txo qis heev, uas cov electrodes tooj liab tsis tuaj yeem ua tiav.
2. EDM tsim sai, nthuav dav me me thiab poob qis: Vim yog qhov hluav taws xob zoo dua ntawm graphite dua li ntawm tooj liab, nws qhov kev tawm mus sai dua li ntawm tooj liab, yog 3 txog 5 npaug ntawm tooj liab. Ntxiv mus, nws tuaj yeem tiv taus qhov tam sim no loj thaum lub sijhawm tawm mus, uas yog qhov zoo dua rau kev ua haujlwm tawm hluav taws xob ntxhib. Lub caij no, nyob rau hauv tib lub ntim, qhov hnyav ntawm graphite yog 1/5 npaug ntawm tooj liab, uas txo qhov hnyav ntawm EDM. Nws muaj qhov zoo heev hauv kev tsim cov electrodes loj thiab cov electrodes txiv neej sib xyaw. Qhov kub sublimation ntawm graphite yog 4200 ℃, uas yog 3 txog 4 npaug ntawm tooj liab (qhov kub sublimation ntawm tooj liab yog 1100 ℃). Thaum kub siab, hloov pauv
Lub zog siab heev ntawm graphite electrode
Nws yog me me heev hauv cov duab (1/3 txog 1/5 ntawm tooj liab nyob rau hauv tib lub zog hluav taws xob) thiab tsis mos. Lub zog tso tawm tuaj yeem hloov mus rau qhov workpiece tau zoo thiab nrog kev siv tsawg. Vim tias lub zog ntawm graphite yeej nce ntxiv ntawm qhov kub siab, nws tuaj yeem txo qhov poob ntawm qhov tso tawm (qhov poob ntawm graphite yog 1/4 ntawm tooj liab), ua kom ntseeg tau tias qhov ua tiav zoo.
3. Lub teeb yuag thiab tus nqi qis: Hauv tus nqi tsim khoom ntawm ib pawg pwm, lub sijhawm ua CNC, lub sijhawm EDM, thiab electrode hnav ntawm cov electrodes suav rau feem ntau ntawm tag nrho cov nqi, thiab tag nrho cov no yog txiav txim siab los ntawm cov khoom siv electrode nws tus kheej. Piv nrog tooj liab, qhov ceev machining thiab EDM ceev ntawm graphite yog ob qho tib si 3 txog 5 zaug ntawm tooj liab. Lub caij no, qhov tshwj xeeb ntawm kev hnav tsawg kawg nkaus thiab kev tsim khoom ntawm cov electrode graphite tuaj yeem txo cov lej ntawm cov electrodes, yog li txo cov khoom siv siv thiab lub sijhawm ua haujlwm ntawm cov electrodes. Tag nrho cov no tuaj yeem txo qhov nqi tsim khoom ntawm cov pwm.
2. Cov Kev Cai thiab Cov Yam Ntxwv ntawm Kev Ua Haujlwm Mechanical thiab Electrical ntawm Graphite Electrodes
1. Kev tsim cov electrodes: Kev tsim cov graphite electrode feem ntau siv cov cuab yeej siv tshuab ceev ceev rau kev ua tiav. Cov cuab yeej siv tshuab yuav tsum muaj kev ruaj khov zoo, nrog rau kev txav mus los peb-axis sib xws thiab ruaj khov yam tsis muaj kev co. Ntxiv mus, qhov tseeb ntawm kev sib hloov ntawm cov khoom xws li lub qhov tseem ceeb kuj yuav tsum zoo li sai tau. Lub electrode kuj tseem tuaj yeem ua tiav ntawm cov cuab yeej siv tshuab dav dav, tab sis cov txheej txheem ntawm kev sau txoj hauv kev cuab yeej txawv ntawm cov electrodes tooj liab.
2. EDM hluav taws xob tso tawm machining graphite electrodes yog cov pa roj carbon electrodes. Vim tias graphite muaj cov hluav taws xob zoo conductivity, nws tuaj yeem txuag tau ntau lub sijhawm hauv kev tso tawm hluav taws xob machining, uas kuj yog ib qho ntawm cov laj thawj vim li cas graphite siv ua electrode.
3. Cov yam ntxwv ntawm kev ua cov graphite electrodes: Cov graphite kev lag luam yog tawv thiab brittle, ua rau hnav hnyav rau cov cuab yeej thaum lub sijhawm CNC machining. Feem ntau, nws raug pom zoo kom siv cov cuab yeej coated nrog cov hlau tawv lossis pob zeb diamond. Thaum machining graphite ntxhib, cov cuab yeej tuaj yeem muab tso ncaj qha rau ntawm thiab tawm ntawm qhov workpiece. Txawm li cas los xij, thaum lub sijhawm ua tiav machining, kom tiv thaiv chipping thiab tawg, cov cuab yeej sib zog thiab txoj kev nrawm nrawm feem ntau raug siv.
Feem ntau hais lus, graphite tsis tshua tawg thaum qhov tob txiav tsawg dua 0.2 hli, thiab qhov zoo dua ntawm phab ntsa sab kuj tuaj yeem tau txais. Cov hmoov av tsim thaum lub sijhawm CNC machining ntawm graphite electrodes yog qhov loj heev thiab tuaj yeem nkag mus rau hauv cov lus qhia, cov ntsia hlau thiab cov spindles ntawm lub cuab yeej tshuab, thiab lwm yam. Qhov no yuav tsum tau hais tias lub cuab yeej ua graphite ua tshuab muaj cov khoom siv sib xws rau kev daws teeb meem nrog cov hmoov av graphite, thiab lub cuab yeej tshuab kev ua haujlwm sealing kuj yuav tsum zoo vim tias graphite yog lom. Hmoov graphite yog ib yam khoom uas rhiab heev rau cov tshuaj lom neeg. Nws qhov kev tiv thaiv hloov pauv hauv ntau qhov chaw sib txawv, txhais tau tias nws tus nqi tiv thaiv sib txawv. Txawm li cas los xij, muaj ib yam uas tseem tsis hloov pauv: hmoov graphite yog ib qho ntawm cov khoom siv hluav taws xob zoo heev uas tsis yog hlau. Tsuav yog hmoov graphite khaws cia rau hauv ib yam khoom rwb thaiv tsev yam tsis muaj kev cuam tshuam, zoo li ib txoj xov nyias nyias, nws tseem yuav raug hluav taws xob. Tab sis tus nqi tiv thaiv yog dab tsi? Tsis muaj tus lej tseeb rau tus nqi no, vim tias qhov zoo ntawm hmoov graphite sib txawv, thiab tus nqi tiv thaiv ntawm hmoov graphite siv rau hauv ntau yam khoom thiab ib puag ncig kuj yuav txawv.
Tej zaum koj yuav tsis paub tias cov hmoov graphite uas muaj purity siab kuj muaj kev siv conductive:
Feem ntau, roj hmab yog rwb thaiv tsev. Yog tias xav tau kev ua hluav taws xob, yuav tsum ntxiv cov tshuaj conductive. Hmoov graphite muaj kev ua hluav taws xob zoo heev thiab cov khoom siv lubricating demolding. Graphite raug ua tiav rau hauv hmoov graphite, uas muaj cov khoom siv lubricating thiab conductive zoo heev. Qhov siab dua qhov purity ntawm hmoov graphite, qhov zoo dua nws cov kev ua tau zoo conductive. Ntau lub Hoobkas khoom roj hmab tshwj xeeb xav tau roj hmab conductive. Tom qab ntawd, puas tuaj yeem ntxiv hmoov graphite rau roj hmab kom ua hluav taws xob? Cov lus teb yog yog, tab sis kuj muaj ib lo lus nug: Qhov sib piv ntawm hmoov graphite hauv roj hmab yog dab tsi? Qee lub tuam txhab siv qhov sib piv tsis pub tshaj 30%, uas yog siv rau cov khoom siv roj hmab uas tsis yooj yim hnav xws li lub log tsheb, thiab lwm yam. Kuj tseem muaj cov Hoobkas roj hmab tshwj xeeb uas siv qhov sib piv ntawm 100%. Tsuas yog cov khoom zoo li no tuaj yeem ua hluav taws xob. Lub hauv paus ntsiab lus ntawm kev ua hluav taws xob yog tias tus neeg coj tsis tuaj yeem cuam tshuam, ib yam li hlau. Yog tias nws raug cuam tshuam hauv nruab nrab, nws yuav tsis raug hluav taws xob. Cov hmoov graphite conductive hauv roj hmab conductive yog tus neeg coj Yog tias cov hmoov graphite raug thaiv los ntawm cov roj hmab rwb thaiv tsev, nws yuav tsis ua hluav taws xob lawm. Yog li ntawd, yog tias qhov sib piv ntawm hmoov graphite qis dhau, qhov cuam tshuam conductive yuav tsis zoo.
Hmoov graphite yog ib yam khoom uas rhiab heev rau cov tshuaj lom neeg. Nws qhov kev tiv taus hloov pauv hauv ntau qhov chaw sib txawv, txhais tau tias nws tus nqi tiv taus sib txawv. Txawm li cas los xij, muaj ib yam uas tseem tsis hloov pauv: hmoov graphite siab-purity yog ib qho ntawm cov khoom siv hluav taws xob zoo heev uas tsis yog hlau. Tsuav yog hmoov graphite khaws cia rau hauv ib yam khoom rwb thaiv tsev yam tsis muaj kev cuam tshuam, zoo li ib txoj xov nyias, nws tseem yuav raug hluav taws xob. Tab sis tus nqi tiv taus yog dab tsi? Tsis muaj tus lej tseeb rau tus nqi no, vim tias qhov zoo ntawm hmoov graphite sib txawv, thiab tus nqi tiv taus ntawm hmoov graphite siv rau hauv ntau yam khoom thiab ib puag ncig kuj yuav txawv.
Lub sijhawm tshaj tawm: Tsib Hlis-09-2025