Txoj kev milling kawg zeb
Hauv cov txheej txheem milling, cov mills kawg tuaj yeem muab faib ua ob hom: down milling thiab up milling, raws li kev sib raug zoo ntawm kev sib hloov ntawm lub milling cutter thiab txiav cov khoom noj. Thaum cov kev taw qhia kev sib hloov ntawm lub milling cutter yog tib yam li workpiece feed direction, nws yog hu ua nce milling. Kev sib hloov kev taw qhia ntawm lub milling cutter yog opposite rau workpiece feed direction, uas yog hu ua up-cut milling.
Climb milling feem ntau yog siv hauv kev tsim khoom tiag. Lub zog noj ntawm down milling yog me dua li ntawm milling. Nyob rau hauv tib txoj kev txiav, lub zog siv ntawm milling down milling yog 5% mus rau 15% qis dua, thiab nws kuj yog qhov tsim nyog rau kev tshem tawm chips. Feem ntau, txoj kev down-milling yuav tsum tau siv kom deb li deb tau los txhim kho qhov chaw tiav (txo qhov roughness) ntawm cov khoom siv thiab xyuas kom meej qhov tseeb. Txawm li cas los xij, thaum muaj txheej txheej nyuaj, slag tsub zuj zuj ntawm qhov chaw txiav, thiab qhov chaw ntawm qhov chaw ua haujlwm tsis sib xws, xws li machining forging blanks, yuav tsum siv txoj kev nce-milling.
Thaum lub sij hawm nce milling, cov txiav hloov ntawm tuab mus rau nyias, thiab cov hniav cutter txiav mus rau hauv lub unmachined nto, uas yog zoo rau kev siv cov milling cutters. Thaum lub sij hawm milling, thaum lub cutter hniav ntawm lub milling cutter tiv tauj lub workpiece, lawv tsis tuaj yeem txiav tam sim ntawd rau hauv cov hlau txheej, tab sis xaub luv luv ntawm qhov chaw ntawm lub workpiece. Nws yog ib qho yooj yim los tsim ib txheej hardened, uas txo cov durability ntawm lub cuab tam, cuam tshuam rau saum npoo ntawm lub workpiece, thiab coj tsis zoo rau kev txiav.
Tsis tas li ntawd, thaum lub sij hawm nce milling, txij li cov hniav cutter raug txiav los ntawm hauv qab mus rau sab saum toj (los yog los ntawm sab hauv mus rau sab nraud), thiab txiav pib los ntawm cov txheej txheej nyuaj, cov hniav cutter raug rau ib qho kev cuam tshuam loj, thiab lub milling cutter yuav npub sai dua, tab sis cov hniav cutter txiav nyob rau hauv. Yog tsis muaj qhov tshwm sim hauv cov txheej txheem, thiab lub worktable yuav tsis txav thaum txiav. Up milling thiab down milling, vim hais tias lub thickness ntawm txiav yog txawv thaum txiav mus rau hauv lub workpiece, thiab qhov ntev ntawm kev sib cuag ntawm cov hniav cutter thiab lub workpiece yog txawv, yog li ntawd qhov hnav degree ntawm milling cutter yog txawv. Qhov kev xyaum qhia tau hais tias lub durability ntawm qhov kawg zeb yog 2 mus rau 3 siab tshaj li ntawm milling nyob rau hauv down milling. lub sij hawm, qhov nto roughness kuj yuav txo tau. Tab sis nce milling tsis haum rau milling workpieces nrog tawv tawv.