Lub taub hau Stretching tuag, Lub taub hau tsim Stretching tuag

Hauv xaim EDM, ib qho hluav taws xob tawm hluav taws xob yog tsim los ntawm cov hlau electrode (feem ntau molybdenum hlau) thiab cov khoom ua haujlwm. Qhov sib txawv ntawm qhov zoo thiab qhov tsis zoo ntawm cov khoom siv hluav taws xob ua rau muaj kev hloov pauv hauv electron emission siv thiab ion bombardment kev taw qhia- qhov no hu ua "polarity effect." Thaum siv cov polarity tsis zoo, cov khoom siv hluav taws xob ntws los ntawm cov hlau electrode mus rau qhov chaw ua haujlwm, cuam tshuam rau qhov chaw ua haujlwm ntawm cov khoom siv hluav taws xob ntau dua; conversely, zoo polarity txhim khu cov nyhuv yaig ntawm electrode hlau nws tus kheej. Qhov sib txawv ntawm lub zog faib ncaj qha cuam tshuam qhov loj thiab qhov sib xws ntawm cov qhov tso tawm, yog li hloov qhov microstructure nto.

Cov kev tshawb fawb pom tau hais tias kev siv kom zoo ntawm cov nyhuv polarity tuaj yeem txhim kho qhov roughness. Piv txwv li, xaiv qhov tsis zoo polarity hom thaum lub sij hawm ua tiav tuaj yeem ua rau lub ntsej muag zoo nkauj vim tias lub zog tsis muaj zog tawm los ntawm cov hluav taws xob txo qis overheating thiab melting ntawm cov khoom. Hloov pauv, qhov chaw polarity tsis raug tuaj yeem ua rau muaj kev tawm tsam hnyav heev hauv cheeb tsam, ua rau lub qhov dej loj - zoo li qhov pits thiab ua rau muaj kev nce siab hauv qhov ntxhib.

Cov nyhuv polarity tsis muaj nyob hauv kev sib cais; nws yuav tsum tau dynamically balanced nrog tsis xws li mem tes dav thiab tam sim no amplitude. Kev siv cov xaim ceev ceev EDM ua piv txwv, thaum lub mem tes dav tswj tau nyob rau hauv 20μs thiab sib phim nrog qhov tsis tshua muaj tam sim no, ua ke nrog qhov tsis zoo polarity kev sib txuas, cov khoom ntim ntawm electrolytic corrosion tuaj yeem cuam tshuam tau zoo, ua tiav qhov siab - tiav nto tiav nrog Ra tus nqi qis dua 1.6μm. Nws yog ib nqi sau cia hais tias cov lus teb ntawm workpieces ntawm txawv thicknesses rau polarity kuj ua raws li ib tug qauv: nyias qhov chaw yog ntau haum rau ib tug luv luv mem tes dav + tsis zoo polarity ua ke, thaum thicker daim hlau yuav tsum tau ib tug me ntsis ntev mem tes ncua sij hawm kom tsis txhob luv luv - Circuit Court txaus ntshai.

Kev xaiv cov kua dej ua haujlwm kuj tseem cuam tshuam rau kev ua haujlwm ntawm cov nyhuv polarity. Emulsion-raws li cov xov xwm cua txias tuaj yeem tsis tsuas yog tshem tawm cov cua sov tam sim ntawd tab sis kuj ua kom zoo dua qhov ruaj khov ntawm cov kab tawm los ntawm ionic conductivity. Kev sim cov ntaub ntawv qhia tau hais tias nyob rau hauv tib polarity tej yam kev mob, siv ib tug mob siab rau dej -raws li dej ua hauj lwm yuav txo tau deg roughness li ntawm 30%, ua tsaug rau nws zoo deionization muaj peev xwm thiab nti tshem tawm cov nyhuv.