Pob BearingTolerances piav

Koj puas nkag siab txog kev ua siab ntev thiab lawv txhais li cas tiag?Yog tsis yog, koj tsis nyob ib leeg.Cov no feem ntau hais tab sis feem ntau tsis muaj kev nkag siab tiag tiag ntawm lawv txhais li cas.Cov vev xaib nrog cov lus piav qhia yooj yim ntawm kev ua siab ntev yog qhov tsawg heev yog li peb txiav txim siab los sau qhov sib txawv.Yog li, yog tias koj xav paub dab tsi "Mean Bore Deviation" thiab "Single Bore Variation" txhais tau li cas?Nyeem ntxiv raws li peb vam tias yuav ua kom pom tseeb dua.

Deviation

Qhov no dictates deb npaum li cas ntawm qhov nominal dimension, qhov tseeb ntsuas tau tso cai.Lub nominal dimension yog ib tug qhia nyob rau hauv lub khw catalog piv txwv li 6200 muaj ib tug nominal bore ntawm 10mm, 688 muaj ib tug nominal bore ntawm 8mm thiab lwm yam. txwv rau qhov siab tshaj plaws sib txawv ntawm cov qhov ntev yog qhov tseem ceeb heev.Yog tsis muaj cov qauv kev kam rau siab thoob ntiaj teb rau cov kabmob (ISO thiab AFBMA), nws yuav yog nyob ntawm txhua tus neeg tsim khoom.Qhov no tuaj yeem txhais tau tias koj xaj 688 cov kabmob (8 hli bore) tsuas yog pom tias nws yog 7 hli bore thiab yuav tsis haum lub ncej.Deviation tolerances feem ntau tso cai rau lub bore los yog OD kom me me tab sis tsis loj tshaj qhov nominal dimension.

Mean Bore/OD Deviation

… los yog ib lub dav hlau txhais tau tias bore txoj kab uas hla sib txawv.Qhov no yog ib qho tseem ceeb kam rau ua thaum saib kom ze ze rau lub nplhaib puab thiab ncej los yog lub nplhaib sab nraud thiab vaj tse.Ua ntej koj yuav tsum to taub hais tias ib tug bearing tsis round.Tau kawg nws tsis nyob deb tab sis thaum koj pib ntsuas hauv microns (ib txhiab millimeters) koj paub tias qhov ntsuas sib txawv.Cia peb coj tus bore ntawm 688 bearing (8 x 16 x 5mm) ua piv txwv.Nyob ntawm seb qhov twg hauv lub nplhaib sab hauv koj siv koj qhov ntsuas, koj tuaj yeem tau txais kev nyeem ntawv nyob qhov twg, hais, ntawm 8mm thiab 7.991 mm yog li koj yuav siv li cas raws li qhov loj me?Qhov no yog qhov uas Mean Deviation tuaj rau hauv. Qhov no suav nrog kev ntsuas ntau hauv ib lub dav hlau radial (peb yuav tuaj rau qhov ntawd hauv ib feeb) hla lub bore lossis OD kom nruab nrab ntawm txoj kab uas hla ntawm lub nplhaib ntawd.

Daim duab no sawv cev rau lub nplhaib puab.Cov xub sawv cev rau ntau yam kev ntsuas thoob plaws hauv lub bore nyob rau hauv ntau cov lus qhia los pab nrhiav pom qhov loj me.Cov txheej txheem ntsuas no tau raug coj mus rau hauv ib lub dav hlau radial piv txwv li ntawm tib lub ntsiab lus raws qhov ntev ntawm lub bore.Cov kev ntsuas yuav tsum tau coj mus rau hauv cov dav hlau sib txawv radial kom paub tseeb tias lub bore yog nyob rau hauv tolerances raws nws ntev.Tib yam siv rau kev ntsuas lub nplhaib sab nraud.

Daim duab no qhia tias TSIS ua li cas.Txhua qhov kev ntsuas tau raug coj los ntawm qhov sib txawv ntawm qhov ntev ntawm lub nplhaib bearing, nyob rau hauv lwm yam lus, txhua qhov kev ntsuas tau raug coj mus rau hauv ib lub dav hlau radial sib txawv.

Yooj yim heev, qhov nruab nrab qhov loj me yog xam raws li hauv qab no:

Qhov no yog qhov muaj txiaj ntsig zoo dua thaum suav cov ncej kam rau ua dua li ib qho kev ntsuas qhov ntsuas uas yuav ua rau tsis raug.

Cia peb hais tias qhov nruab nrab qhov sib txawv ntawm qhov siab rau P0 bearing yog +0/-8 microns.Qhov no txhais tau hais tias qhov nruab nrab bore tuaj yeem nyob nruab nrab ntawm 7.992mm thiab 8.000mm.Tib txoj cai siv rau lub nplhaib sab nrauv.

Dav Deviation

… los yog sib txawv ntawm ib leeg sab hauv los yog sab nplhaib dav ntawm lub nominal dimension.Tsis xav tau kev piav qhia ntau ntawm no.Raws li nrog bore thiab OD qhov ntev, qhov dav yuav tsum tau tswj nyob rau hauv tej yam tolerances.Txij li qhov dav feem ntau tsis tshua muaj teeb meem, qhov kam rau ua yog dav dua rau cov kabmob bore lossis OD.Qhov dav sib txawv ntawm +0/-120 txhais tau hais tias yog tias koj ntsuas lub nplhaib sab hauv lossis sab nraud ntawm ib qho chaw ib puag ncig, hais tias, 688 (4mm wide) bearing, nws yuav tsum tsis txhob dav dua 4mm (qhov nominal dimension) los yog nqaim tshaj 3.880mm.

Kev hloov pauv

Variation tolerances kom roundness.Nyob rau hauv no daim duab ntawm ib tug phem tawm-ntawm-round 688 puab nplhaib, qhov loj tshaj plaws ntsuas yog 9.000mm thiab qhov tsawg tshaj plaws 7.000mm.Yog tias peb xam qhov loj me (9.000 + 7.000 ÷ 2) peb tuaj nrog 8.000mm.Peb nyob rau hauv qhov txhais tau tias deviation kam rau ua tab sis cov kabmob yuav pom meej tias siv tsis tau yog li koj pom tias kev sib txawv thiab kev hloov pauv tuaj yeem tsis muaj txiaj ntsig yam tsis muaj ib leeg.

Ib leeg Bore/OD Variation

...los yog ntau dua, Bore/OD Diameter Variation in a Single Radial Plane (tau kawg, tam sim no koj paub txhua yam txog ib lub dav hlau radial!).Saib ntawm daim duab ntawm sab laug qhov twg qhov ntsuas qhov tob ntawm 8.000mm thiab 7.996mm.Qhov sib txawv ntawm qhov loj tshaj plaws thiab qhov tsawg tshaj plaws yog 0.004mm, yog li ntawd, qhov sib txawv ntawm txoj kab uas hla ntawm lub dav hlau radial no yog 0.004mm lossis 4 microns.

Mean Bore/OD Diameter Variation

Ok, ua tsaug rau txhais tau tias bore / OD sib txawv thiab ib leeg bore / OD variation, peb zoo siab tias peb cov kabmob yog ze txaus rau qhov loj me thiab yog puag ncig txaus tab sis yuav ua li cas yog tias muaj ntau dhau ntawm taper ntawm lub bore lossis OD as per daim duab ntawm sab xis (yog, nws yog exaggerated heev!).Qhov no yog vim li cas peb kuj muaj txhais tau tias bore thiab OD variation txwv.

Txhawm rau kom tau txais qhov txhais tau tias bore lossis OD variation, peb sau cov ntsiab lus bore lossis OD hauv cov dav hlau radial sib txawv thiab tom qab ntawd txheeb xyuas qhov sib txawv ntawm qhov loj thiab me tshaj.Xav tias sab laug ntawm no, cov txheej txheem saum toj kawg nkaus ntawm kev ntsuas muab qhov nruab nrab qhov loj ntawm 7.999mm, nruab nrab yog 7.997mm thiab hauv qab yog 7.994mm.Nqa qhov tsawg tshaj plaws ntawm qhov loj tshaj plaws (7.999 -7.994) thiab qhov tshwm sim yog 0.005mm.Peb qhov nruab nrab qhov sib txawv yog 5 microns.

Dav Variation

Ntxiv dua thiab, ncaj heev.Cia peb xav tias, rau ib qho kev coj tus kheej, qhov kev tso cai dav hloov pauv yog 15 microns.Yog tias koj yuav tsum ntsuas lub nplhaib sab hauv lossis sab nraud ntawm ntau lub ntsiab lus sib txawv, qhov ntsuas loj tshaj plaws yuav tsum tsis txhob ntau tshaj 15 microns ntau dua qhov ntsuas qhov tsawg tshaj plaws.

Radial Runout

... ntawm cov kabmob sib dhos hauv / sab nraud yog lwm qhov tseem ceeb ntawm cov kabmob kam rau ua.Piv txwv tias qhov sib txawv ntawm lub nplhaib sab hauv thiab sab nraud yog nyob rau hauv kev txwv thiab lub roundness yog nyob rau hauv qhov kev tso cai variance, muaj tseeb uas yog txhua yam peb yuav tsum tau txhawj txog?Saib daim duab no ntawm ib lub nplhaib puab.Lub bore deviation yog OK thiab yog li yog qhov txawv txav tab sis saib seb lub nplhaib dav txawv li cas.Zoo li txhua yam ntxiv, lub nplhaib dav tsis zoo ib yam ntawm txhua qhov chaw nyob ib ncig ntawm lub voj voog tab sis radial runout tolerances qhia ntau npaum li cas qhov no tuaj yeem sib txawv.

Inner nplhaib runout

… yog ntsuas los ntawm kev ntsuas tag nrho cov ntsiab lus ntawm ib lub voj voog ntawm lub nplhaib puab thaum lub kiv puag ncig thaum lub nplhaib sab nraud nyob ruaj ruaj thiab siv qhov ntsuas me me kom deb ntawm qhov loj tshaj plaws.Qhov no radial runout cov nuj nqis muab nyob rau hauv cov lus kam rau ua qhia qhov siab tshaj plaws variation tso cai.Qhov sib txawv ntawm lub nplhaib thickness ntawm no yog exaggerated los qhia lub ntsiab lus kom meej meej.

Outer nplhaib runout

yog kuaj los ntawm kev ntsuas tag nrho cov ntsiab lus ntawm ib lub voj voog ntawm lub nplhaib sab nraud thaum lub sij hawm ib lub kiv puag ncig thaum lub nplhaib puab nyob ruaj ruaj thiab siv qhov ntsuas me me kom deb ntawm qhov loj tshaj plaws.

Lub ntsej muag Runout/Boe

Qhov kev ua siab ntev no ua kom cov kabmob puab lub nplhaib nyob ze txaus rau lub kaum sab xis nrog lub ntsej muag sab hauv.Cov nuj nqis kam rau lub ntsej muag runout / bore tsuas yog muab rau cov kabmob ntawm P5 thiab P4 precision qib.Tag nrho cov ntsiab lus ntawm ib lub voj voog ntawm lub nplhaib puab nyob ze rau ntawm lub ntsej muag yog ntsuas thaum lub sij hawm ib lub kiv puag ncig thaum lub nplhaib sab nraud nyob ruaj khov.Tom qab ntawd lub bearing yog tig dua thiab lwm sab ntawm lub bore yog xyuas.Siv qhov ntsuas loj tshaj plaws ntawm qhov tsawg tshaj plaws kom tau txais lub ntsej muag runout/bore bore kam rau ua.

Face Runout/OD

… los yog variation ntawm sab nraud nto generatrix inclination nrog lub ntsej muag.Qhov kev ua siab ntev no ua kom cov kabmob sab nraud ntawm lub nplhaib yog ze txaus rau lub kaum sab xis nrog lub ntsej muag lub nplhaib sab nraud.Cov nuj nqis kam rau lub ntsej muag runout / OD tau muab rau P5 thiab P4 cov qib siab.Tag nrho cov ntsiab lus ntawm ib lub voj voog ntawm lub nplhaib sab nraud ntawm lub ntsej muag raug ntsuas thaum lub sij hawm ib lub kiv puag ncig thaum lub nplhaib puab nyob ruaj khov.Tom qab ntawd lub bearing yog tig dua thiab sab nraud ntawm lub nplhaib sab nraud raug kuaj xyuas.Siv qhov ntsuas loj tshaj plaws ntawm qhov tsawg tshaj plaws kom tau txais lub ntsej muag runout / OD bore kam rau ua.

Lub ntsej muag Runout / Raceway yog qhov zoo sib xws tab sis, hloov pauv, sib piv qhov kev xav ntawm sab hauv lossis sab nrauv lub nplhaib sib tw nrog lub ntsej muag sab hauv lossis sab nraud.