Nyob rau hauv kev lag luam kev lag luam, ib tug neeg ib zaug kwv yees tias muaj ntau lub voj voog workpieces dua li cov workpieces tiaj tus, xws li cov ntsia hlau, txiv ntseej, gaskets, mus rau lub tog raj kheej thiab cov kabmob. Daim ntawv thov ntawm cov duab ncig yog qhov tseeb heev. Niaj hnub no, tus editor yuav tham nrog koj txog lub ntsiab lus ntawm "roundness" hauv kev ntsuas (cov qauv siv: ISO / DIS 1101: 2017, ISO 5459).
"roundness"
Hauv JIS B0621-1984 "Definition and Expression of Form and Position Deviation",
Roundness txhais tau tias "qhov loj ntawm lub voj voog geometrically zoo meej uas deviates los ntawm lub voj voog",
Txoj kev qhia tau sau tseg tias "roundness yog ib lub voj voog (C) yog sandwiched los ntawm ob lub voj voog concentric ntawm lub geometry, thaum qhov kev ncua deb ntawm ob lub voj voog concentric yog qhov tsawg tshaj plaws, siv (f) los sawv cev lub vojvoog sib txawv ntawm ob lub voj voog. , thiab lub roundness Qhia nyob rau hauv mm los yog μm."
Rau rotating Cheebtsam, qhov teeb meem tam sim no feem ntau yog yuav ua li cas los ntsuas lawv qhov tseeb "zoo". Qhov no pib nrog "roundness tolerance".
Dab tsi yog "roundness kam rau ua"?
Lub roundness kam rau ua ib cheeb tsam txhais tau hais tias qhov kam rau ua cheeb tsam yog nyob nruab nrab ntawm ob concentric voj voog ntawm tib seem. Raws li pom nyob rau hauv daim duab hauv qab no, lub voj voog rho tawm yuav tsum raug txwv nyob rau hauv cheeb tsam kam rau nruab nrab ntawm ob lub coplanar concentric voj voog uas nws lub vojvoog txawv yog t.
duab
Vim li cas ho ua roundness thiab cylindricity tolerances tshwm sim? Feem ntau muaj cov laj thawj no:
Tsis zoo roundness thiab cylindricity tshwm sim los ntawm kev co ntawm kev ua machinery
Tsis zoo roundness thiab cylindricity vim deterioration ntawm rotating qhov chaw ntawm cov tshuab ua
Tsis zoo puag ncig thiab cylindricity vim qhov tsis zoo ntawm qhov chaw nruab nrab
Tsis zoo roundness thiab cylindricity tshwm sim los ntawm deformation nyob rau hauv yav dhau los ua thaum lub sij hawm sib tsoo centerless
Distortion ntawm workpieces tshwm sim los ntawm kev tuav tsis zoo jigs los yog tuav txoj kev rau lub nplhaib qhov chaw
Tsis zoo roundness tshwm sim los ntawm kev puas tsuaj ntawm cov cuab yeej txiav, kev teeb tsa tsis zoo, kev co, thiab lwm yam.
Deformation tshwm sim los ntawm kev kho cua sov tom qab ua tiav, thiab lwm yam.
Yuav ua li cas ntsuas thiab ntsuas roundness, dab tsi yog muaj?
Kev ntsuam xyuas ntawm roundness
Muaj ntau txoj kev ntsuam xyuas rau roundness, txhua txoj kev muaj nws tus yam ntxwv thiab qhov zoo, feem ntau peb yuav xaiv raws li qhov xav tau ntawm lub workpiece ...
Kev ntsuas yooj yim, xws li:
txoj kab uas hla
Txoj kab uas hla ntawm roundness yog nyeem ncaj qha los ntawm lub ntsuas ntsuas xws li micrometer.
Txoj kev ntsuas no yooj yim heev thiab yooj yim rau kev khiav lag luam. Tab sis thaum ntsuam xyuas daim duab peb sab thiab pentagonal sib npaug-inch strain voj voog, nws yog ib qho yooj yim rau kev ntsuas yuam kev raws li lub voj voog zoo meej yog tias nws tsis yog lub voj voog zoo meej.
peb taw tes txoj kev
Txoj kev peb lub ntsiab lus tuaj yeem tau txais cov ntaub ntawv roundness los ntawm [V-shaped block plus micrometer / gauge plus bench].
Txawm li cas los xij, qhov tangent ntawm qhov chaw txhawb nqa xaiv nyob rau hauv peb txoj kev sib txawv, thiab tej zaum yuav ntsuas tsis raug. Qhov nruab nrab ntawm qhov siv tsis tuaj yeem txiav txim siab, thiab qhov yuam kev tuaj yeem tshwm sim vim qhov nce thiab nqis ntawm qhov khoom yuav tsum ntsuas thaum nws tig.
duab
Kev ntsuas raws li cov qauv tsim nyog, xws li:
txoj kev vojvoog
Txoj kev vojvoog siv qhov sib txawv ntawm tus nqi siab tshaj plaws ntawm lub vojvoog thiab qhov tsawg kawg nkaus tus nqi hluav taws xob tau txais thaum lub workpiece tig ib zaug los ntsuas qhov sib npaug. Nyob rau hauv txoj kev ntsuam xyuas raws li qhia hauv daim duab hauv qab no, cov txiaj ntsig kev ntsuas kuj tau yooj yim cuam tshuam los ntawm kab rov tav txav ntawm lub workpiece.
Lub cheeb tsam kam rau siab yog nyob nruab nrab ntawm ob lub voj voog concentric ntawm tib seem
Central mus kom ze
Txoj kev kuaj pom ntawm txoj hauv nruab nrab feem ntau yog siv rau kev ntsuas qhov tseeb dua. Cov ntaub ntawv ntawm kev tshawb nrhiav roundness nyob ntawm lub voj voog siv. Cov kev ntsuas sib txawv ntawm lub voj voog ntsuas yuav ua rau qhov chaw sib txawv ntawm lub voj voog siv, uas yuav cuam tshuam rau txoj haujlwm axial ntawm qhov ntsuas qhov ntsuas.
Tsawg Squares Circle LSC
Los ntawm kev haum lub voj voog rau qhov ntsuas qhov profile, qhov sib npaug ntawm cov squares ntawm qhov sib txawv ntawm cov ntaub ntawv profile los ntawm lub voj voog yog qhov tsawg, thiab tus nqi ncig yog ces txhais raws li qhov kev ncua deb ntawm qhov siab tshaj qhov sib txawv ntawm qhov profile ntawm lub voj voog (siab tshaj plaws mus rau qis tshaj. hav).
ΔZq=Rmax-Rmin, lub cim ntawm roundness tus nqi qhia los ntawm LSC
Yam tsawg kawg nkaus lub voj voog MZC
Muab qhov ntsuas qhov profile los ntawm kev tso ob lub voj voog sib luag xws li tias lawv qhov sib txawv radial raug txo qis. Txhais tus nqi ncig raws li qhov sib cais radial ntawm ob lub voj voog.
ΔZz=Rmax-Rmin , qhia lub cim ntawm roundness tus nqi los ntawm MZC
Yam tsawg kawg ntawm lub voj voog ncig MCC
Tsim lub voj voog me tshaj plaws uas tuaj yeem kaw qhov profile ntsuas. Tus nqi ncig yog ces txhais tau tias yog qhov sib txawv tshaj plaws ntawm qhov profile los ntawm lub voj voog no
Nws yog feem ntau siv rau hauv kev ntsuam xyuas ntawm shafts, rods, thiab lwm yam.
ΔZc=Rmax-Rmin, qhia lub cim ntawm tus nqi roundness los ntawm MCC.
Qhov siab tshaj plaws sau lub voj voog MIC
Tsim lub voj voog loj tshaj plaws uas tuaj yeem kaw qhov profile ntsuas. Tus nqi ncig yog ces txhais tau tias yog qhov sib txawv tshaj plaws ntawm qhov profile los ntawm lub voj voog no.
ΔZi=Rmax-Rmin, lub cim ntawm tus nqi roundness yog sawv cev los ntawm MIC.
Nyob rau hauv tus txheej txheem ntawm kev ntsuam xyuas roundness, thiaj li yuav txo tau los yog tshem tawm cov suab nrov tsis tsim nyog, qhov tau txais contour feem ntau yog lim.
Kev cuam tshuam ntawm cov lim dej ntawm qhov ntsuas qhov profile
Raws li kev ntsuas sib txawv, cov txheej txheem lim dej kuj sib txawv, thiab cov khoom lim txiav tawm kuj txawv. (UPR: fluctuation per revolution), raws li qhia hauv daim duab hauv qab no, nws tuaj yeem pom tias qhov cuam tshuam ntawm qhov chaw lim dej ntawm qhov ntsuas qhov profile txawv.
Tsis muaj lim:
Low pass filter:
Bandpass lim:
Thiab raws li cov kws tshuaj ntsuam xyuas, cov duab no qhia tau dab tsi rau peb?
Kev ntsuas ntsuas ntsuas
Daim duab: Daim duab qhia kev ntsuas
1 UPR tivthaiv
1 UPR: Tsuas yog ib nthwv dej nkaus xwb tom qab lim:
1UPR tivthaiv sawv cev rau eccentricity ntawm lub workpiece txheeb ze rau lub axis ntawm kev sib hloov ntawm lub ntsuas ntsuas. Lub amplitude ntawm lub waveform nyob ntawm qhov kev hloov ntawm nws qib.
duab
Ntxiv WeChat: Yuki7557 xa 10G CNC qhia
2 UPR tivthaiv
2 UPR cov khoom yuav qhia tau tias:
① Kev hloov kho tsis txaus ntawm cov cuab yeej ntsuas;
② Lub voj voog khiav tsis zoo vim qhov tsis raug ntawm lub tshuab ua haujlwm ntawm lub tshuab cuab yeej tsim nws cov duab;
③ Cov duab ntawm lub workpiece yog oval hauv kev tsim, xws li hauv IC cav pistons.
duab
3 ~ 5 UPR tivthaiv
Tej zaum yuav txhais tau tias:
① Deformation vim overtightening ntawm cov chuck tuav ntawm lub ntsuas ntsuas.
②Los deformation vim muaj kev ntxhov siab tso tawm thaum tshem tawm ntawm lub chuck ruaj khov ntawm cov cuab yeej ua tshuab.
duab
5 ~ 15 UPR tivthaiv
Feem ntau qhia txog qhov tsis sib npaug hauv txoj kev machining lossis txheej txheem ntawm kev tsim cov khoom ua haujlwm.
duab
15 (ntxiv) UPR Cheebtsam
15 (los yog ntau tshaj) UPR tej yam kev mob feem ntau yog tus kheej-induced los ntawm cov cuab yeej chatter, tshuab vibration, coolant xa los, cov khoom inhomogeneities, thiab lwm yam.
duab
Lub ntsiab parameter rau kev ntsuas roundness
parameter
lub ntsiab lus
RONt
Ntsuas tus nqi ntawm roundness, uas sawv cev rau qhov sib txawv ntawm qhov siab tshaj plaws tus nqi ntawm qhov zoo ncig nkhaus thiab qhov tsawg kawg nkaus tus nqi ntawm qhov tsis zoo voj voog nkhaus lossis qhov sib npaug ntawm qhov tseem ceeb.
RONp
Qhov ntsuas tus nqi ntawm qhov siab siab ntawm qhov nkhaus roundness, qhia qhov siab tshaj plaws ntawm qhov zoo meej roundness nkhaus
RON
Qhov ntsuas roundness, uas sawv cev rau tus nqi ntawm qhov tsawg kawg nkaus ntawm qhov tsis zoo roundness nkhaus
QUR
Lub hauv paus square txhais tau tias square ntsuas ntawm roundness, sawv cev rau lub hauv paus square txhais tau tias square ntawm roundness nkhaus
Cov saum toj no tsuas yog excerpted los ntawm LSCI ""
duab
Thaum kawg, cia peb saib seb cov cuab yeej thiab cov cuab yeej muaj dab tsi rau ntsuas qhov sib npaug?
Cov cuab yeej siv / Cov cuab yeej siv los ntsuas Roundness
micrometer:
duab
Roundness ntsuas ntsuas:
duab
CMM:
