Dab tsi yog Electrolytic Sib Tsoo (ECM)?
Electrolytic Sib Tsoo (ECM)
Basic Principple of Electrolytic Sib Tsoo
Electrolytic sib tsoo yog txheej txheem sib tsoo uas sib txuas cov electrochemical anodic dissolution ntawm cov hlau nrog kev sib tsoo tshuab. Daim duab schematic ntawm txoj cai sib tsoo electrolytic yog qhia hauv daim duab 6-26.
Thaum lub sij hawm sib tsoo, lub workpiece txuas nrog tus ncej zoo ntawm DC fais fab mov, thiab lub tshuab electrolytic sib tsoo log (tseem hu ua kev sib tsoo lub log) txuas nrog tus ncej tsis zoo ntawm DC fais fab mov. Cov nplej abrasive protruding los ntawm electrolytic sib tsoo log tuav ib tug tej yam electrolytic sib txawv ntawm ob tug ncej, thiab ib tug tshwj xeeb npaum li cas ntawm electrolyte yog txhaj rau hauv qhov sib txawv. Thaum lub zog DC txuas nrog, hlau nto ntawm qhov chaw ua haujlwm (anode) dhau los ntawm electrochemical dissolution, thiab cov hlau atoms ntawm qhov chaw poob electrons thiab ua ions, dissolving rau hauv electrolyte. Nyob rau tib lub sijhawm, cov pa oxygen hauv electrolyte ua ke nrog cov hlau ions los ua ib zaj duab xis oxide nyias nyias ntawm qhov chaw ua haujlwm. Cov oxide zaj duab xis no muaj qhov ua haujlwm siab, uas ua rau cov txheej txheem anodic dissolution qeeb. Thaum lub sijhawm no, lub siab -kev sib tsoo sib tsoo lub log tsis tu ncua tshem tawm cov oxide zaj duab xis, thiab nws yog nqa tawm los ntawm electrolyte. Raws li qhov tshwm sim ntawm kev sib xyaw ua ke thiab kev ua haujlwm ntawm anodic dissolution thiab mechanical sib tsoo, lub workpiece nto tsis tu ncua etched tam sim ntawd, tsim ib tug du nto thiab ua tiav qhov yuav tsum tau muaj qhov tseeb.
Nyob rau hauv cov txheej txheem ntawm electrolytic sib tsoo, cov hlau yog tsuas yog corroded los ntawm electrochemical anodic dissolution txiav txim, thiab lub electrolytic sib tsoo log tsuas yog ua hauj lwm rau grind tam sim ntawd cov anodic passivation zaj duab xis ntawm cov khoom electrolytic thiab theem saum npoo.
Cov yam ntxwv ntawm Electrolytic Sib Tsoo
① Kev ua haujlwm dav dav, kev ua haujlwm siab ntau lawmTxij li kev sib tsoo electrolytic feem ntau yog ib qho kev ua electrolytic, txhua yam khoom siv hlau uas muaj siab hardness thiab siab toughness tuaj yeem ua tiav los ntawm kev xaiv cov electrolyte uas tsim nyog. Piv txwv li, thaum sib tsoo cemented carbide, kev ua haujlwm ntawm electrolytic sib tsoo yog 3 mus rau 5 npaug siab dua piv rau kev sib tsoo nrog cov pob zeb diamond sib tsoo zoo tib yam.
② High machining raug, zoo nto zooVim tias lub luag haujlwm ntawm kev sib tsoo lub log yog txhawm rau tshem tawm cov oxide zaj duab xis, es tsis yog kev sib tsoo cov hlau, kev sib tsoo quab yuam thiab kev sib tsoo kub yog me me, thiab cov xwm txheej xws li kev sib tsoo burrs, tawg, kub hnyiab, thiab lwm yam yuav tsis tshwm sim. Qhov dav dav roughness tuaj yeem tsawg dua 0.16 um, thiab qhov tseeb machining zoo ib yam li kev sib tsoo tshuab.
③ Me me sib tsoo log hnavPiv txwv li, thaum sib tsoo cemented carbide, qhov hnav ntawm silicon carbide sib tsoo lub log hauv kev sib tsoo zoo tib yam yog li 400% ~ 600% ntawm qhov hnyav ntawm cov cemented carbide tshem tawm; nrog electrolytic sib tsoo, hnav tus nqi ntawm kev sib tsoo log tsuas yog 50% ~ 100% ntawm cov cemented carbide tshem tawm. Me me sib tsoo log hnav pab txhim kho machining raug.
Txawm hais tias cov electrolytes siv rau kev sib tsoo electrolytic tsis muaj zog corrosive passivating electrolytes (xws li NaNO3, NaNO2 thiab lwm yam), cov cuab yeej siv tshuab thiab cov khoom siv tseem yuav tsum tau siv los tiv thaiv - ntsev ntsuas, thiab txiav ntug ntawm pwm (blanking dies) yuav tsum tsis txhob ua hauv av heev ntse thaum ua tiav los ntawm electrolytic sib tsoo.
Daim ntawv thov ntawm Electrolytic Sib Tsoo hauv Mould Processing
① Kev ua haujlwm nyuaj - mus rau - cov khoom siv tshuabElectrolytic sib tsoo yog ywj siab ntawm hardness ntawm lub workpiece, yog li nws yog ib qho zoo heev thaum siv rau kev ua nyuaj - mus rau - cov ntaub ntawv tshuab nrog siab hardness. Piv txwv li, ua cov pav ca ntawm cemented carbide pwm nrog ntsug electrolytic nto sib tsoo tshuab tsis tsuas yog yields siab ntau lawm efficiency tab sis kuj zoo ua hauj lwm zoo.
② Txo cov kauj ruam ua thiab xyuas kom zoo sib tsooYav dhau los, thaum tsim ntau yam segmented pwm (pieced- ua ke pwm), nws yog ib qho tsim nyog rau cov txheej txheem ntxhib raws li cov duab ntawm cov ntu, ua raws li kev sib tsoo thiab daim ntawv sib tsoo tom qab kev kho cua sov, ua rau ntau kauj ruam. Ntxiv mus, txhawm rau tiv thaiv thermal deformation, ib qho kev sib tsoo loj heev feem ntau tau tso tseg. Thaum sib tsoo pwm, ntau lub pob zeb diamond sib tsoo log tau noj, uas ua rau cov pwm pwm nce ntxiv. Thaum siv electrolytic sib tsoo, cemented carbide ntu tuaj yeem siv ncaj qha yam tsis muaj kev ua haujlwm ntxhib, yog li txo cov txheej txheem ua haujlwm, thiab sib tsoo kub, tawg, kub hnyiab, thiab deformation yuav tsis tshwm sim thaum sib tsoo, uas tuaj yeem lav qhov kev sib tsoo zoo.
③ Txhim kho kev ua haujlwm zooKev sib tsoo daim ntawv feem ntau siv ib zaug -daim sib tsoo log (los yog lub log sib tsoo) rau plunge sib tsoo ntawm nto grinders, daim ntawv grinders, los yog optical profile grinders. Kev siv lub log sib tsoo zoo tib yam feem ntau yuav tsum tau hnav khaub ncaws ntau heev vim qhov hnav loj ntawm kev sib tsoo log, thiab lub sijhawm siv rau kev sib tsoo log hnav thiab kev sib sau yuav siv sijhawm ntau, yog li ncua sijhawm ua haujlwm. Yog tias siv electrolytic sib tsoo, qhov hnav ntawm lub log sib tsoo me me, thiab lub sijhawm hnav ntawm lub log sib tsoo yog luv, uas yuav pab txhim kho kev ua haujlwm zoo.
