Pem hauv ntej thiab nram qab
Cov hniav cib kuj tseem muaj geometric tsis xws li pem hauv ntej, nraub qaum, rake lub kaum sab xis, lub kaum sab xis nram qab, txiav band, thiab lwm yam. Daim duab 3-26 yog ib qho qauv ntawm cov hniav. Cov kab liab nyob rau hauv daim duab loj yog nyob rau hauv pem hauv ntej, uas yog tib txoj kev rau chips txiav tawm lub workpiece thiab tso tawm: lub xiav dot kab yog thawj rov qab, thiab ntsuab luv luv kab yog lub thib ob rov qab, uas tsis yog. ib tug tsim nyog qauv rau kawg mills, tab sis nws yog ib tug qauv uas muaj ntau kawg mills muaj, uas yuav ua rau kom lub nti qhov chaw thiab txo qhov kev sib txhuam ntawm lub nraub qaum thiab machined nto. 1) Lub groove hauv qab arc nyob rau hauv pem hauv ntej yog txoj kev rau cov chips ntws tawm ntawm curl. Qee zaum, nws yog ib qho tsim nyog yuav tsum ua kom luv luv ntawm kev sib cuag ntawm lub nti thiab pem hauv ntej ntawm lub cuab yeej los ua kom lub deformation ntawm cov nti. Hauv qhov no, txoj kev qhia hauv daim duab 3-18b tuaj yeem siv tau. Txawm li cas los xij, txoj kev no nce txoj kab uas hla ntawm cov tub ntxhais cutter thiab txo qhov chaw nti. Daim duab 3-27 qhia lwm txoj kev los hloov cov nti tawm lub xeev, piv txwv li, kev hloov ntawm lub ntsej muag rake ntawm cov hniav ncig. Nyob rau hauv txoj kev no, lub nti yog ntxiv dag zog, kev sib cuag ntev ntawm riam nti yog luv, thiab qhov chaw nti yog lav.
Daim duab 3-28 qhia ob hom sib txawv ntawm cov kaum sab xis (radial rake angles). Qhov zoo rake lub kaum sab xis ntawm cov hniav ncig tuaj yeem tsim lub kaum sab xis sib dua, uas yooj yim txiav rau hauv cov khoom yuav tsum tau machined, thiab cov chips tsim khoov kev nyuaj siab rau pem hauv ntej, uas feem ntau pom zoo rau machining cov ntaub ntawv xws li me me hlau, aluminium thiab stainless hlau yog tias qhov kev ntxhov siab khoov no loj dhau, thiab nws feem ntau pom zoo rau kev siv cov khoom siv xws li cov hlau me, aluminium thiab stainless hlau: lub kaum sab xis tsis zoo ntawm cov hniav ncig ua rau muaj zog txiav ntug, thiab cov chips nyob rau hauv pem hauv ntej. ntawm lub cuab yeej
Qhov saum npoo ua rau muaj kev ntxhov siab, uas tsis yooj yim rau kev puas tsuaj rau lub cuab yeej, thiab feem ntau pom zoo rau machining nruab nrab carbon steel thiab hardening pins.
2) Cov duab tom qab cov hniav perimeter kuj yuav muaj kev cuam tshuam rau kev siv qhov kawg milling. Feem ntau, muaj peb daim ntawv yooj yim tom qab cov hniav ncig: planar, concave, thiab shoveling, raws li qhia hauv daim duab 3-29. (1) Hom tiaj tiaj yog qhov yooj yim ntawm sab nraub qaum, thiab nws yog hom ntau tshaj plaws thaum ua cov ntaub ntawv tsis-ferrous xws li txhuas thiab tooj liab. Nws tuaj yeem siv rau ob qho tib si circumferential thiab kawg cov hniav, nrog rau thawj thiab thib ob tom qab ntawm cov hniav kawg.
2. Lub nraub qaum ntawm lub concave hom yog tsim kom muaj qhov sib txawv ntawm qhov sib txawv ntawm ntug txiav, cov qauv rov qab no zoo nkaus li ntse heev, thiab kev sib tsoo rov qab yog qhov yooj yim heev, tab sis lub kaum sab xis loj tom qab txiav ntug ua rau lub cuab yeej tawg thiab yooj yim rau kev sib tsoo. raug puas los ntawm chips, yog li ntawd, nws feem ntau tsis pom zoo, thiab cov chaw tsim khoom tsis tshua muag zoo li no rov qab milling cutter.
3. Lub nraub qaum ntawm lub duav sib tsoo hom tseem hu ua lub nraub qaum ntawm lub duav rov qab hom, uas yog tus yam ntxwv ntawm qhov nkhaus ntawm sab nraub qaum (qhov nkhaus no yog Archimedes kauv), tsuav yog lub kaum sab xis pem hauv ntej tau lees tias tsis hloov pauv thaum pem hauv ntej yog rov sib tsoo, lub nraub qaum ntawm lub milling cutter yuav tsis hloov. Hom rov qab no feem ntau yog siv rau lub kaum sab xis ntawm cov hniav nyem thiab tuaj yeem tsim muaj zog txiav ntug. Tam sim no, ntau qhov kawg mills siv cov shovel sib tsoo hom tom qab lub voj voog radial rov qab, nrog rau thawj sab nraub qaum thiab lub nraub qaum thib ob, tab sis qee zaus nws kuj tuaj yeem pom tias lub nraub qaum thib ob yog tsim nrog hom tiaj tus.
3-26
3-27
3-28
3-29
Txiav txoj siv
Qee cov milling cutters muaj lub hnub qub convex tom qab thawj lossis thib ob rov qab, thiab cov qauv no feem ntau hu ua "ribbed band" lossis "ntug cheeb tsam", tab sis txoj kev txiav txim siab ntawm "ntug band" txhais lub kaum sab xis rau {{ 0}} degree , yog li nws hu ua "ntug band". Ob qho tom qab ob hauv daim duab 3-26 yog nyob rau hauv xws li "band". Cov tav uas nqaim dhau tuaj yeem ua rau cov hniav yooj yim tawg, thaum cov tav uas dav dhau tuaj yeem ua rau muaj kev sib txhuam ntau dhau.
Qhov tseeb 0 degree "blade belt" muaj qhov cuam tshuam zoo heev rau kev tshem tawm kev co, thiab lwm yam. Sumitomo Electric cov kev tiv thaiv kev vibration kawg mills nrog cov hniav tsis sib npaug thiab cov kaum sab xis tsis sib xws, raws li tau hais ua ntej, muaj xoom-degree ntug siv nyob rau hauv cov duab ntawm ib ncig arc, uas yog heev pab tau rau kev co tshem tawm. Cov kab dawb nyias sab hauv cov kab liab liab uas pom hauv daim duab 3-30 ntawm sab xis yog txiav ntug rau kev ua haujlwm nrog ntev sab, thiab cov milling cutters nrog cov chips splitting grooves (saib daim duab 3-31) kuj tau siv dav. nyob rau hauv lub roughing ntau yam.
Daim duab 3-32 qhia hom chipping rau Walter roughing cutter nrog flute. Flutes nrog cov duab puag ncig (domed domes) yog qhov yooj yim rau kev tsim khoom, thaum sab saum toj ntawm flutes nrog cov duab tiaj tus (paj sab saum toj thiab domes) yog ua los ntawm kev txiav sab nraud. Piv txwv li, lub flat-top chiplet ua rau txiav ntug ntawm cutter sharper.
Daim duab 3-33a yog daim duab schematic ntawm lub suab ntawm qhov sib tsoo ntawm lub chip-splitting cutter, nrog cov xim sib txawv uas sawv cev rau cov npoo sib txawv, thiab ib qho siab dua lwm qhov uas muaj cov nyhuv pub. Qhov chaw nruab nrab ntawm ob txoj kab txiav yog cov qauv txiav ntawm cov ntug txiav. Nws tuaj yeem pom tau tias cov qauv txiav no tsis yog tsuas yog cuam tshuam nrog lub suab ntawm lub chipset, tab sis kuj yog rau tus nqi txiav siv. Qhov no yog qhov txawv me ntsis ntawm cov pob kws txiav cov pob kws tau tham hauv Tshooj 4, qhov twg cov khoom siv yuav tsum tau siv los ntawm ib qho kev txiav ntug flute ntawm lub flutes ntawm cov hniav wavy tsis tuaj yeem raug tshem tawm tag nrho los ntawm cov hniav tom kawg.
Daim duab 3-33b qhia txog qhov sib txawv ntawm lub tshuab raj nplaim ntawm lub zog thiab hnav. Kaw pitches (qhov me me) muaj qhov qis dua qhov hnav tab sis qhov kev thov siab rau lub tshuab fais fab, yog li cov iav zoo siv rau cov khoom siv tshuab nyuaj thiab qhov tob me me ntawm kev txiav, thaum cov iav ntxhib yog siv rau cov khoom siv siab thiab siv tau. rau cov tshuab hluav taws xob tsawg.
3-30
3-31
3-32
3-33
ces kaum
Lub ces kaum yog hais txog kev hloov pauv ntawm qhov ncig thiab cov hniav kawg ntawm qhov kawg zeb.
Muaj ob lub ntsiab ntawm cov ces kaum rau kawg mills: chamfered thiab filleted.
Daim duab 3-34a yog hom chamfered. Muaj ob qhov tseem ceeb ntawm hom chamfer: lub chamfer dav K thiab lub chamfer kaum (feem ntau yog 45 degree): Daim duab 3-34b yog hom rounding, thiab lub ntsiab parameter ntawm lub rounding hom yog lub vojvoog arc.
Lub kaum sab xis ntawm lub kaum sab xis yog lub kaum sab xis ntawm lub kaum sab xis rau lub hom chamfer, thaum lub voj voog hom yuav tsum muaj kev hloov pauv ntawm lub kaum sab xis mus rau qhov kawg ntawm cov hniav.
Nws tuaj yeem nyuaj me ntsis kom ua tiav qhov kev hloov pauv ntuj nyob rau pem hauv ntej ntawm lub ces kaum. Yog li ntawd, muaj ob txoj hauv kev los tswj lub hauv ntej ntawm lub ces kaum: txuas mus rau pem hauv ntej ntawm tus hniav circumferential (saib daim duab 3-34b) thiab txuas mus rau pem hauv ntej ntawm tus hniav kawg (saib daim duab {{1 }}c). Vim lub zog qis ntawm cov ces kaum, tus nqi qis dua ntawm ob lub kaum sab xis ntawm cov hniav kawg thiab cov hniav hlais txuas.
3-34
