Dab tsi yog cov khoom siv feem ntau siv milling cutters

Cov kev cai yooj yim rau milling cutter txiav cov khoom siv

1) High hardness thiab hnav tsis kam: ntawm qhov kub thiab txias, cov ntaub ntawv txiav yuav tsum muaj qhov nyuaj txaus los txiav rau hauv qhov chaw ua haujlwm; Nrog siab hnav tsis kam, lub cuab yeej yuav tsis hnav thiab ua kom nws lub neej ua haujlwm ntev.

2) Kev ua haujlwm kub zoo: lub cuab yeej yuav tsim kom muaj cua sov ntau hauv cov txheej txheem txiav, tshwj xeeb tshaj yog thaum txiav ceev, qhov kub yuav siab heev. Yog li ntawd, cov cuab yeej siv yuav tsum muaj cov cua sov zoo, uas tuaj yeem tswj tau qhov hardness ntawm qhov kub thiab txias thiab txuas ntxiv txiav. Cov cuab yeej no nrog kub hardness kuj hu ua thermal hardness lossis liab hardness.

3) Lub zog muaj zog thiab zoo toughness: nyob rau hauv cov txheej txheem txiav, lub cuab yeej yuav tsum muaj kev cuam tshuam zoo, yog li cov khoom siv yuav tsum muaj lub zog siab, txwv tsis pub nws yooj yim tawg thiab puas. Vim hais tias lub milling cutter yuav raug cuam tshuam thiab vibrated, milling cutter khoom yuav tsum muaj zoo toughness los tiv thaiv ntug vau thiab fragmentation.

Cov khoom siv ntawm milling cutter

(1) Kev kub ceev cov cuab yeej steel (hu ua siab- steel ceev, pem hauv ntej steel, thiab lwm yam) muab faib ua dav dav - lub hom phiaj thiab tshwj xeeb - lub hom phiaj siab - ceev steel.

1) Cov ntsiab lus ntawm tungsten, chromium, molybdenum thiab vanadium yog siab, thiab quenching hardness tuaj yeem ncav cuag hrc62-70. Nws tseem tuaj yeem tswj tau siab hardness ntawm 600 degree.

2) Cov ntug txiav muaj lub zog zoo thiab toughness thiab muaj zog kev co kuj. Nws tuaj yeem siv los tsim cov cuab yeej nrog kev txiav ceev. Rau cov cuab yeej siv tshuab tsis zoo, siab -ceev steel milling cutter tseem tuaj yeem txiav du.

3) Cov txheej txheem ua tau zoo, yooj yim forging, ua thiab sib tsoo, thiab tuaj yeem tsim cov cuab yeej nrog cov duab nyuaj.

4) Piv nrog cov cemented carbide cov ntaub ntawv, nws tseem muaj qee qhov tsis zoo, xws li tsis tshua muaj zog, tsis zoo xim liab thiab hnav tsis kam.

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Cemented carbide

: nws yog ua los ntawm hlau carbide, tungsten carbide, titanium carbide thiab hlau binder mas cobalt los ntawm hmoov metallurgy txheej txheem.

1) Nws tuaj yeem tiv taus qhov kub thiab txias thiab tswj kev ua haujlwm zoo ntawm li 800-10000c. Qhov kev txiav ceev tuaj yeem yog 4-8 npaug siab dua li cov hlau kub ceev.

2) High hardness thiab zoo hnav tsis kam ntawm chav tsev kub.

3) Lub zog dabtsi yog khoov qis, qhov cuam tshuam toughness tsis zoo, thiab cov hniav tsis yooj yim rau zom. Nws ntse heev.

Feem ntau siv cemented carbide tuaj yeem muab faib ua peb pawg:

① Tungsten cobalt cemented carbide (YG)

Feem ntau siv hom YG3, YG6 thiab YG8, uas tus lej qhia txog feem pua ​​​​ntawm cov ntsiab lus cobalt. Cov ntsiab lus cobalt ntau dua, qhov zoo dua toughness, cuam tshuam thiab kev co kuj, tab sis hardness thiab hnav tsis kam yuav raug txo. Yog li ntawd, cov alloy yog tsim rau txiav cam khwb cia hlau thiab tsis yog -ferrous hlau. Nws tseem tuaj yeem siv los txiav cov khoom ntxhib nrog kev cuam tshuam siab thiab quenched steel thiab stainless hlau qhov chaw.

② Titanium cobalt cemented carbide (YT)

Cov khoom siv feem ntau yog YT5, YT15 thiab yt30, thiab tus lej sawv cev rau feem pua ​​​​ntawm titanium carbide. Cemented carbide uas muaj titanium carbide tuaj yeem txhim kho qhov sib txuas ntawm cov hlau, txo cov kev sib txhuam coefficient, thiab txhim kho me ntsis hardness thiab hnav tsis kam, tab sis txo cov bending zog thiab toughness thiab ua rau cov khoom nkig. Yog li ntawd, hom alloy no haum rau txiav steel qhov chaw.

③ General purpose cemented carbide

Ntxiv qhov tsim nyog ntawm cov hlau tsis tshua muaj carbide, xws li tantalum carbide thiab niobium carbide, mus rau saum toj no ob hom cemented carbide tuaj yeem kho nws cov nplej, txhim kho nws qhov kub thiab txias hardness, hnav tsis kam, sib txuas kub thiab oxidation tsis kam, thiab nce lub toughness ntawm alloy. Yog li no, hom cemented carbide cutter muaj kev ua tau zoo thiab kev ua tau zoo. Nws cov hom yog yw1 Yw2 thiab ya6 yog siv los ua cov ntaub ntawv nyuaj, xws li siab -lub zog steel, tshav kub- steel resistant, stainless hlau, thiab lwm yam.

(3) Ceramics: tseem hu ua oxidation milling cutter,

1) Kev ua haujlwm siab heev, ua haujlwm kub txog li 1200 degrees, thiab siab compressive zog,

2) Lub brittleness loj dhau, yog li lub zog tsis siab, yog li cov nyiaj txiav tsis tuaj yeem loj dhau. Yog li ntawd, nws yog qhov tsim nyog rau kev ua tiav kawg, lossis lwm yam hnav zoo heev-cov khoom tsis yog-cov khoom siv hlau ua tiav.

Raws li nws cov khoom tseem ceeb, cov khoom siv ceramic tshiab tuaj yeem muab faib ua peb pawg: alumina system, silicon nitride system thiab cov khoom sib xyaw silicon nitride alumina system. Txhua yam ntawm cov khoom siv ceramic tsuas tuaj yeem siv rau qee qhov kev txiav raws li lawv cov khoom thiab cov khoom. Piv txwv li, thaum milling steel (hardness qis dua 35hrc), tsuas yog kub nias ceramic milling cutter tuaj yeem xaiv tau; Thaum milling grey cam khwb cia hlau, Sialon ceramic cuab yeej khoom (xws li composite Si3N. - Al2 () 3 ceramic cuab tam, uas yog lub npe dav dav ntawm ntau pawg compound muaj li ntawm Si-Al - () - N series ntsiab) yuav tsum nyiam, ua raws li cov khoom siv kub nias ceramic; Thaum milling npib tsib xee puag alloy (lub qhov ncauj Tsawg dua los yog sib npaug rau 6.35mm, f=0.13 0.30mm), Sialon ceramic cuab yeej yog tsim nyog.

(4) Cov cuab yeej Superhard: pob zeb diamond thiab cubic boron nitride.

1) Nws yog zoo heev nyob rau hauv hardness, hnav tsis kam thiab kub kuj. Nws muaj qhov toughness txaus thiab tuaj yeem tiv taus kub txog 2000 degrees,

2) Lub brittleness loj dhau thiab lub zog tsis siab, uas yog qhov tsim nyog rau kev ua tiav kawg

3) Pob zeb diamond yog dav siv nyob rau hauv milling cutters, feem ntau ua txhua yam uas tsis yog-ferrous hlau, tsis yog-cov ntaub ntawv hlau thiab cov ntaub ntawv sib xyaw. Cubic boron nitride (CBN) feem ntau yog siv rau hauv lub ntsej muag milling cutters, thiab lub npe raug yog ldp-j-cxf (composite polycrystalline cutter block).

(5) Cov khoom siv coated.

Nws hais txog txheej txheej ntawm cov hlau sib xyaw nrog lub zog siab thiab hnav tsis kam ntau microns tuab ntawm cov cemented carbide lossis siab - cov cuab yeej steel ceev. Nws tsis tsuas yog muaj kev cuam tshuam toughness ntawm lub matrix, tab sis kuj muaj qhov siab hardness, uas nthuav dav daim ntawv thov ntau yam ntawm cov hniav coated thiab zoo heev txhim kho qhov kev ua tau zoo.