EDM yog cov txheej txheem tseem ceeb hauv kev tsim pwm, tshwj xeeb tshaj yog hauv kev txhaj tshuaj pwm. Txawm li cas los xij, qee qhov kev nkag siab tsis zoo hauv cov txheej txheem EDM ntawm lub Hoobkas pwm feem ntau ua rau tsis ua haujlwm ntawm kev ua haujlwm raug, nto thiab ua haujlwm kom tau raws li qhov yuav tsum tau ua. Cov hauv qab no yuav txheeb xyuas qhov kev nkag siab tsis zoo ntawm EDM hauv cov chaw tsim khoom pwm.
01
Siv cov electrode kov lub workpiece, thiab nws yog feem ntau "tsis nco qab"
Cov txheej txheem ntawm kev siv electrodes ncaj qha kov lub workpiece belongs rau nto tiv tauj. Muaj inevitably ntau lossis tsawg dua cov khoom zoo ntawm qhov chaw sib cuag, thiab tseem muaj qhov yuam kev clamping ntawm qhov chaw sib cuag, uas yuav cuam tshuam ncaj qha rau qhov raug ntawm ntug nrhiav thiab nruab nrab. Siv txoj kev no, nws yuav tsum nruj me ntsis kom so qhov chaw sib cuag kom huv si, tab sis vim muaj tib neeg cov yam ntxwv, qhov tseeb yuav tsis ruaj khov.
Rau cov lej tswj hluav taws xob tawm tshuab, nws raug nquahu kom siv cov txheej txheem ntawm kev siv lub pob nruab nrab, uas yog ib txoj hauv kev tsim nyog rau kev tawm ntawm lub tshuab pwm. Qhov kev coj ua niaj hnub yog:
Clamping lub workpiece;
Muab ib lub pob datum rau ntawm lub rooj ntev zaum;
Nruab qhov kev sojntsuam ntawm lub taub hau spindle;
Siv cov kev sojntsuam mus rau nruab nrab ntawm lub workpiece;
Siv qhov kev sojntsuam mus rau nruab nrab lub pob siv;
Tshem tawm qhov kev sojntsuam thiab teeb tsa lub electrode;
Tom qab electrodes yog siv los nruab nrab ntawm lub pob siv
duab
Txij li thaum cov txheej txheem nruab nrab yog qhov taw tes rau qhov kev hnov mob, qhov kev ua haujlwm siab qhov tseeb ntawm μm tuaj yeem ua tiav. Tsis tas li ntawd, qhov kev ncua deb ntawm lub pob siv ntawm lub tshuab electrode raug txo qis, cov hlab ntsha ntawm lub tshuab tuaj yeem siv tau tag nrho, thiab kev ua haujlwm tau zoo tuaj.
Tau kawg, yog tias cov txheej txheem ntau lawm yog qhov zoo tshaj plaws, qhov eccentricity ntawm electrode tuaj yeem ntsuas los ntawm peb qhov kev sib koom ua ke sab nraum lub tshuab, thiab tus nqi eccentricity tuaj yeem xa mus rau EDM tshuab cuab yeej. Tsis tas yuav faib cov chaw nruab nrab ntawm EDM tshuab cuab yeej, uas tuaj yeem txhim kho kev siv cov cuab yeej siv tshuab, txhim kho tag nrho cov kev ua haujlwm ntawm EDM.
02
Tshuab tsim siv tib yam khoom siv electrode
Feem ntau cov tuam txhab pwm hauv tsev siv tooj liab liab ua cov khoom siv electrode. Nyob rau niaj hnub no nrhiav kev ua haujlwm siab, koj puas tau tshawb xyuas qhov ua tau zoo ntawm graphite electrodes? Tej zaum koj tsuas xav tias graphite electrodes tsuas yog haum rau kev ua pwm loj lossis kev ua haujlwm ntxhib. Qhov tseeb, qhov kev nkag siab zoo li no yog ib sab lossis tseem nyob hauv cov qauv qauv qauv.
Tam sim no, ntau thiab ntau lub tuam txhab pwm tau pib siv graphite electrodes kom luv luv lub voj voog tsim pwm. Vim hais tias txawm nws yog cov txheej txheem ntawm milling electrodes los yog hluav taws xob tawm machining, kev ua tau zoo tuaj yeem txhim kho tau zoo, uas yog qhov tseem ceeb ntawm graphite electrodes. Tsis tas li ntawd, qhov loj electrodes ua los ntawm graphite yog lub teeb nyob rau hauv qhov hnyav, qhov nqaim slit ua tsis yooj yim rau deform, CNC milling tsis muaj burrs, thiab tag nrho cov electrode tuaj yeem tsim los txo cov electrodes, thiab lwm yam. qhia txog qhov zoo ntawm cov khoom siv graphite. Tau kawg, kev ua graphite tsis haum rau kev ua haujlwm zoo uas yuav tsum tau Ra0.4μm lossis tsawg dua.
Rau micro-machining, tsis tshua muaj electrode poob yog yuav tsum tau. Lub sijhawm no, nws yog ib qho tsim nyog yuav tsum tau siv cov khoom siv tooj liab zoo lossis chrome-tooj liab electrodes. Rau cov hluav taws xob tawm machining ntawm cov khoom muaj nqis ntxiv, kev siv cov tooj liab-tungsten kim dua tuaj yeem tau txais cov khoom siv hluav taws xob me me, tshwj xeeb tshaj yog nyob rau hauv kev ua haujlwm ntawm cov khoom siv tawv tawv.
03
Lub electrode spark txoj hauj lwm yog ua me me heev, uas zoo heev txo cov kev ua hauj lwm efficiency
Cov tuam txhab lag luam feem ntau tau hloov kho dua tshiab los ntawm cov tshuab hluav taws xob tawm mus rau cov lej tswj hluav taws xob tawm tshuab. Thaum ntau lub chaw tsim khoom siv cov lej tswj hluav taws xob tawm tshuab, cov txheej txheem electrode spark txoj haujlwm tseem hais txog cov tshuab hluav taws xob ib txwm siv. Siv unilateral 0.05mm.
Lub me me electrode spark txoj hauj lwm zoo heev txwv lub peev xwm ntawm CNC hluav taws xob motors siv cov tam sim no loj rau high-speed machining. Nyob rau hauv qhov tseeb, tom qab high-ceev plunge ua, sab ntawm kab noj hniav yuav smoothed sai sai tsuas yog los ntawm translational processing, uas yog ib tug txheej txheem txheej txheem kom ua tiav cov nyhuv zoo meej ntawm paug nto, efficiency, thiab precision ntsuas. Ntawm no yog ib qho kev siv. Lub txim ntawm qhov ntxhib machining electrode ntawm lub tshuab tso tawm CNC yog 0.3 ~ 0.15mm ntawm ib sab, thiab cov electrode tiav yog 0.15 ~ {{8} }.05mm ntawm ib sab. Nws yog ib qho tsim nyog yuav tsum tau xa mus rau thaj chaw tawm thiab cov nqi ua haujlwm. Yog tias thaj chaw tso cai, lub txim taws yuav tsum tau ua kom loj li sai tau kom tau txais txawm tias ob peb zaug ntawm kev ua haujlwm zoo.
04
Tseem siv phau ntawv chucks rau nruab thiab kho electrodes
Rau lub zog lossis kev xav txog tus nqi, cov tuam txhab siv cov khoom siv phau ntawv chucks rau nruab thiab kho cov electrodes. Txoj kev no yog qhov yooj yim thiab siv tau, thiab siv dav. Txawm li cas los xij, qee lub tuam txhab tau yuav ntau pua txhiab lub tshuab hluav taws xob CNC, thiab tseem siv phau ntawv chucks.
Siv cov tsoos phau ntawv collet, qhov tseeb siv tus nqi ntawm lub tshuab cuab yeej tsis siab. Yog tias qhov kev ua tau zoo tsis tuaj yeem txaus siab, nws tsuas tuaj yeem siv peev nyiaj ntau ntxiv los ua kom cov cuab yeej tawm tshuab. Qhov tseeb, tus nees zoo xav tau lub eeb zoo, thiab lub tshuab CNC yuav tsum tau nruab nrog 3R ceev clamping thiab qhov chaw kho kom zoo nkauj, uas tuaj yeem txuag cov txheej txheem ntawm kev ntsuas kev ntsuas, txo qhov nquag sawv ntsug ntawm lub tshuab cuab yeej, thiab txhim kho kev tsim khoom.
05
Siv cov cuab yeej siv tshuab CNC, tsis muaj kev ua haujlwm ntawm sab ntaus thiab oblique ntaus
Lub tshuab hluav taws xob CNC tuaj yeem paub txog sab txiav, oblique txiav thiab kev sib txuas ua haujlwm ntau axis. Piv txwv li, ib co molding inserts ntawm txhaj pwm muaj kuj nyias thiab sib sib zog nqus kua nplaum me ntsis nyob ib ncig ntawm lawv, thiab cov khoom no yog heev haum rau sab punching.
R lub kaum sab xis ntawm lub cuab yeej sab laug tom qab EDM txiav yog ib hom kev ua haujlwm ntau. Yog tias siv txoj kev X, Y, thiab Z peb-axis txuas, uas yog, kev ua oblique, nws tuaj yeem zam qhov tshwm sim ntawm qhov tsis ruaj khov vim qhov me me ntawm kev ua haujlwm. Qhov tshwm sim ntawm lub zos poob ntawm electrodes.
Rau lub rooj vag oblique ua rau pwm, ntau lub Hoobkas ua nws raws li Z-ntug los ntawm tilting pwm. Qhov tseeb, nws tuaj yeem ua tiav los ntawm kev siv oblique xuas nrig ntaus ua haujlwm ntawm CNC EDM tshuab cuab yeej, thiab kev ua haujlwm ntawm oblique rooj vag tuaj yeem pom tau los ntawm qhov chaw pib thiab qhov kawg taw tes. Thaum tsim cov electrode, nws yog ib qho tsim nyog los tsim cov electrode raws li txoj kev oblique.
Qee lub tsev tsim khoom tau nruab nrog high-end CNC EDM cov cav tov, thiab cov cuab yeej siv tshuab kuj tseem nruab nrog C-axis. Txawm li cas los xij, thaum ua lub kaum rooj vag ntawm cov pwm ntxig, C-axis muaj nuj nqi yuav tsis siv. Txhawm rau kom paub txog kev ua tiav ntawm lub kaum rooj vag, cov ntxig ntxig tau muab faib ua ob ntu rau inlaying. Qhov tseeb, nws tuaj yeem ua tiav siv servo machining ntawm C axis.
06
Nws yog qhov nyuaj kom ua tau raws li qhov yuav tsum tau ua ntawm qhov loj-qhov chaw ua haujlwm siab gloss
Yog hais tias EDM ntawm lub tuam txhab pwm yog ntawm ib cheeb tsam loj (ntau tshaj 30 square centimeters), thiab qhov saum npoo yuav tsum tau qis dua VDI18, yuav tsum muaj qhov zoo nkauj zoo nkauj, zoo li TV chaw taws teeb tswj hom kab noj hniav. Ces hluav taws xob tawm machining yog mob taub hau. Nws yog feem ntau trimmed dua rau qhov kev ntxhib los mos, thiab cov kev ua tau zoo kuj tsawg heev.
Yog tias cov pwm loj thiab cov kab noj hniav loj yuav tsum tau ua tiav hauv cov khoom siv, cov hmoov sib xyaw ua cov tshuab yuav tsum tau txiav txim siab, uas tuaj yeem txhim kho kev ua tau zoo thiab ua kom yooj yim kom tau txais cov cheeb tsam loj loj los yog daim iav nto.
07
Tsis tsim nyog EDM Surface Quality Control
Qee lub tuam txhab pwm tsis muaj qhov xav tau siab heev rau cov pwm uas lawv tsim, thiab cov khoom tso tawm yuav tsum tau polished tom qab. Nyob rau hauv cov ntaub ntawv no, cov pwm hluav taws xob paug machining yog ua raws li cov kev cai ntawm VDI18 (Ra{1}}.8μm) los yog txawm iav nto ua, tab sis tib lub sij hawm yws tias qhov paug tawm qeeb qeeb thiab lub sij hawm xa tuaj. lig.
Cov tuam txhab lag luam yuav tsum tswj hwm qhov zoo ntawm qhov paug tawm raws li qhov sib txawv ntawm cov pwm pwm, thiab paub meej tias qhov tseem ceeb ntawm qhov paug tawm yog qhov ua tau zoo lossis zoo. Rau feem ntau ntawm cov txheej txheem uas yuav polished tom qab, nws yog txaus rau cov hluav taws xob paug machining mus txog VDI22 (Ra1.25μm) los yog saum toj no. Rau qhov hloov maj mam, nws tuaj yeem ua tiav kom tsis txhob polishing deformation. Dab tsi yuav tsum tau hais txog ntawm no yog tias thaum ua raws li cov txheej txheem zoo matt nto hauv qab VDI22, lub sij hawm tso tawm yuav tau nce ntau, thiab cov electrode poob kuj yuav nce ntxiv.
08
Qhov yuam kev hauv daim iav EDM
Pwm tuam txhab uas muag uas tsis tau nyob rau hauv kev sib cuag nrog daim iav EDM yuav txaus siab rau lub tshuab no. Hmoov tsis zoo, vim tsis muaj qhov kev paub dhau los, qee qhov ntawm lawv cov kev paub tsis raug tuaj yeem ua rau kev ua tsis tiav.
Qhov tseeb, rau CNC tshuab hluav taws xob tso tawm, nws tsis yooj yim rau kev ua tiav daim iav nto, tab sis cov iav sub-daim iav zoo li VDI7 (Ra0.2μm) yog qhov nyuaj heev rau txheej txheem. Txawm hais tias qhov zoo ntawm daim iav zoo tuaj yeem ua tiav, ntxiv rau cov kev xaiv ua haujlwm, nyob ntawm ntau yam ntawm cov khoom ntawm lub workpiece. Qee cov ntaub ntawv xws li SKD11, DC53, thiab S136 cuav tsis tuaj yeem ua tiav daim iav zoo ib yam, yog li nws yuav tsum tau txiav txim siab cov khoom siv thiab txiav txim siab nqa daim iav tso tawm, txwv tsis pub nws yuav nkim sijhawm thiab ua tsis tau raws li qhov yuav tsum tau ua.
Lub ntsiab ntawm kev ua daim iav yog kev tswj lub sijhawm. Txawm hais tias thaj chaw loj npaum li cas, yuav tsum tau teem sijhawm ntau npaum li cas. Cov kws tshaj lij tuaj yeem hloov kho kom paub tseeb tias cov iav ua haujlwm tau zoo.
