Koj paub dab tsi txog cov ntsiab lus dimensioning hauv kev tsim kho tshuab uas yuav tsum tau them nyiaj rau?
Dimensions ntawm tag nrho cov khoom:
Lawv yog qhov ntev uas txhais cov duab tag nrho thiab qhov loj ntawm ib qho khoom.Cov qhov ntev no feem ntau yog sawv cev raws li tus lej muaj nuj nqis hauv cov thawv duab plaub uas qhia qhov siab, dav thiab ntev.
Tolerances:
Tolerances yog qhov tso cai hloov pauv hauv qhov ntev uas ua kom haum, ua haujlwm, thiab sib dhos.Tolerances yog txhais los ntawm kev sib xyaw ua ke ntxiv thiab rho tawm cov cim nrog rau cov lej muaj nuj nqis.Ib lub qhov nrog 10mm txoj kab uas hla +- 0.05mm, piv txwv li, txhais tau hais tias txoj kab uas hla ntawm 9.95mm txog 10.05mm.
Geometric Dimensions & Tolerances
GD&T tso cai rau koj los tswj thiab txhais cov geometry ntawm cov khoom thiab cov yam ntxwv sib dhos.Lub kaw lus muaj xws li kev tswj cov thav duab thiab cov cim qhia cov yam ntxwv xws li flatness (los yog concentricity), perpendicularity (los yog parallelism), thiab lwm yam.
Nto tiav
Nto tiav yog siv los qhia qhov xav tau kev ntxhib los mos lossis smoothness ntawm qhov chaw.Qhov saum npoo tiav yog qhia siv cov cim zoo li Ra (txhais lej lej), Rz (qhov siab qhov siab tshaj plaws), thiab qhov tshwj xeeb roughness qhov tseem ceeb.
Threaded Features
Txhawm rau kom loj me me threaded cov khoom, xws li bolts lossis screws, koj yuav tsum qhia cov xov loj, suab thiab xov xov.Koj tuaj yeem suav nrog lwm cov ntsiab lus, xws li xov ntev, chamfers lossis xov ntev.
Kev Sib Txuas Lus & Kev Sib Tham
Dimensioning cov ntsiab lus tseem ceeb kuj tseem ceeb thaum tsim cov khoom sib dhos los txiav txim siab txog kev sib raug zoo ntawm cov khoom, nrog rau cov clearances xav tau rau kev ua haujlwm zoo.Nws yog ib qho tseem ceeb kom qhia meej mating nto, alignments, qhov khoob thiab ib qho kev kam rau ua rau kev ua haujlwm.
Dimensioning txoj kev rau cov qauv
Dimensioning txoj kev rau cov qhov (dig muag qhov, threaded qhov, countersunk qhov, countersunk qhov);dimensioning txoj kev rau chamfers.
❖ Qhov muag qhov muag
❖ Threaded qhov
❖ Counterbore
❖ Countersinking qhov
❖ Chamfer
Machined qauv ntawm ib feem
❖ Undercut zawj thiab sib tsoo log overtravel groove
Txhawm rau kom yooj yim tshem tawm cov cuab yeej los ntawm ib feem thiab xyuas kom meej tias qhov chaw ntawm qhov chaw sib txuas yog tib yam thaum lub sij hawm sib dhos, ib qho ua ntej ua tiav undercut groove, los yog sib tsoo log overtravel groove, yuav tsum tau siv rau ntawm theem ntawm qhov chaw. ua tiav.
Feem ntau, qhov luaj li cas ntawm qhov undercut tuaj yeem qhia tau tias "groove depth x diam", lossis "groove depth x groove width".Lub overtravel zawj ntawm kev sib tsoo lub log thaum sib tsoo lub ntsej muag kawg lossis lub voj voog sab nraud.
❖ Drilling qauv
Qhov dig muag qhov drilled los ntawm ib lub laum muaj 120deg lub kaum sab xis hauv qab.Qhov tob ntawm lub tog raj kheej yog qhov drilling qhov tob, tsis suav nrog lub qhov.Kev hloov pauv ntawm lub qhov kauj ruam thiab 120deg lub khob hliav qab yog cim los ntawm lub khob hliav qab nrog ib txoj kev kos duab, nrog rau qhov loj me.
Txhawm rau kom ntseeg tau tias qhov tseeb drilling, thiab kom tsis txhob muaj kev sib tsoo me ntsis, nws yog ib qho tseem ceeb uas lub laum me ntsis lub axis yuav perpendicular li sai tau rau lub ntsej muag ntawm qhov kawg raug drilled.Cov duab hauv qab no qhia tau hais tias yuav ua li cas kom raug teeb tsa peb lub ntsej muag drilling.
❖ Tus thawj thiab dimples
Feem ntau, qhov chaw uas tuaj rau hauv kev sib cuag nrog lwm qhov chaw lossis qhov chaw yuav tsum tau kho.Bosses thiab pits ntawm castings feem ntau tsim los txo qhov chaw ua haujlwm thaum ua kom muaj kev sib cuag zoo ntawm qhov chaw.Kev them nyiaj yug tus thawj coj nto thiab kev txhawb nqa qhov pits yog bolted;txhawm rau txo qhov ua tiav, qhov zawj yog tsim.
Common Part Structures
❖ Lub tes tsho lub tes tsho
Shafts, bushings, thiab lwm qhov chaw yog cov piv txwv ntawm cov khoom no.Ntev npaum li qhov yooj yim saib thiab ntu ntu tau qhia, nws muaj peev xwm nthuav qhia nws cov qauv hauv zos thiab cov yam ntxwv tseem ceeb.Lub axis rau qhov projection feem ntau yog muab tso rau kab rov tav kom nws yooj yim los saib cov duab kos.Lub axis yuav tsum tau muab tso rau ntawm ib txoj kab ntsug.
Lub axis ntawm bushing yog siv los ntsuas qhov radial qhov ntev.Qhov no yog siv los txiav txim F14, thiab F11 (saib Tshooj AA), piv txwv li.Daim duab kos.Cov qauv tsim yuav tsum sib koom ua ke nrog cov txheej txheem ntsuas.Piv txwv li, thaum ua cov khoom seem ntawm lub tshuab dhos koj tuaj yeem siv thimbles los thawb lub qhov nruab nrab ntawm lub qhov.Hauv kev taw qhia ntev, qhov tseem ceeb kawg lub ntsej muag lossis qhov chaw sib cuag (lub xub pwg), lossis cov khoom siv tuaj yeem siv los ua tus qauv ntsuas.
Daim duab qhia tau hais tias lub xub pwg nyom ntawm sab xis nrog nto roughness Ra6.3, yog lub ntsiab lus siv rau qhov ntev ntawm qhov ntev.Qhov ntau thiab tsawg xws li 13, 14, 1.5, thiab 26.5 tuaj yeem kos los ntawm nws.Lub hauv paus auxiliary cim cov ncej tag nrho ntev 96.
❖Disk npog qhov chaw
Hom ntu no feem ntau yog lub tiaj tus disk.Nws suav nrog cov npog kawg, lub hau npog, lub zog, thiab lwm yam.Lub ntsiab qauv ntawm cov khoom no yog lub cev rotating nrog ntau yam flanges thiab puag ncig qhov sib npaug.Cov qauv hauv zos, xws li cov tav.Raws li txoj cai dav dav, thaum xaiv cov kev xav koj yuav tsum xaiv cov seem saib raws tus axis lossis dav hlau ntawm symmetry raws li koj lub ntsiab saib.Koj tuaj yeem ntxiv lwm qhov kev pom rau daim duab (xws li sab laug saib, sab xis, lossis saib sab saum toj) txhawm rau kom pom qhov sib xws ntawm cov qauv thiab cov duab.Nyob rau hauv daim duab nws tau pom tias sab laug saib tau ntxiv los qhia cov square flange, nrog nws cov ces kaum sib npaug thiab sib npaug ntawm plaub los ntawm qhov.
Thaum ua kev ntsuas ntawm disk npog cov axis ntawm kev mus ncig thoob plaws lub qhov ntawm lub qhov feem ntau xaiv raws li lub radial dimension axis thiab qhov tseem ceeb tshaj plaws ntug feem ntau xaiv raws li lub ntsiab dimension datum nyob rau hauv cov kev taw qhia ntawm ntev.
❖ Qhov chaw rau lub diav rawg
Lawv feem ntau suav nrog cov pas nrig sib txuas thiab hloov rab diav rawg, thiab ntau yam khoom siv.Vim lawv txoj haujlwm ua haujlwm sib txawv, qhov chaw ua haujlwm thiab cov duab ntawm ib feem raug txiav txim siab thaum xaiv qhov kev pom uas yuav siv los ua qhov tseem ceeb.Kev xaiv ntawm lwm txoj kev xav feem ntau yuav xav tau tsawg kawg yog ob qhov kev pom zoo nrog rau cov seem tsim nyog, cov kev xav ib nrab, thiab lwm yam kev qhia siv los qhia seb cov qauv hauv zos li cas rau daim.Kev xaiv cov kev pom pom nyob rau hauv qhov chaw ntawm daim duab pedal lub rooj zaum yog qhov yooj yim thiab yooj yim to taub.Txhawm rau nthuav qhia qhov loj ntawm tav thiab bearing txoj cai saib tsis tas yuav tsum tau, tab sis rau cov tav uas yog T-shaped nws yog qhov zoo dua los siv cov ntoo khaub lig.haum.
Thaum ntsuas qhov ntev ntawm rab rawg-hom Cheebtsam lub hauv paus ntawm ib feem nrog rau txoj kev npaj symmetry ntawm cov khoom feem ntau yog siv raws li qhov ntev ntawm qhov taw qhia.Txheeb xyuas daim duab qhia txog kev txiav txim siab qhov ntev.
❖Qhov chaw ntawm lub thawv
Feem ntau, daim ntawv thiab cov qauv ntawm ib feem yog qhov nyuaj dua li lwm yam peb yam.Tsis tas li ntawd, cov haujlwm ntawm kev ua haujlwm hloov.Lawv feem ntau suav nrog lub cev lub cev, lub twj tso kua mis lub cev txo lub thawv, thiab ntau yam khoom siv.Thaum xaiv ib qho kev pom rau lub ntsiab saib, cov kev txhawj xeeb tseem ceeb yog qhov chaw ntawm qhov chaw ua haujlwm thiab cov yam ntxwv ntawm cov duab.Yog tias koj xaiv lwm qhov kev pom, qhov tsim nyog saib xyuas xws li ntu lossis ib feem kev pom, ntu thiab oblique views yuav tsum raug xaiv raws li qhov xwm txheej.Lawv yuav tsum qhia meej txog cov qauv sab nrauv thiab sab hauv ntawm daim.
Nyob rau hauv cov nqe lus ntawm dimensioning, lub axis uas yuav tsum tau siv los ntawm tsim qhov tseem ceeb mounting nto thiab qhov chaw sib cuag (los yog txheej txheem nto) raws li zoo raws li symmetry txoj kev npaj (dav ntev) ntawm lub ntsiab qauv ntawm lub thawv, thiab lwm yam. raws li qhov ntev ntawm qhov siv.Thaum nws los txog rau thaj chaw ntawm lub thawv uas yuav tsum tau txiav cov qhov ntev yuav tsum tau cim raws li qhov ua tau kom yooj yim tuav thiab tshuaj xyuas.
Nto roughness
❖ Lub tswv yim ntawm roughness ntawm qhov chaw
Lub microscopically zoo li tus geometric yam ntxwv uas muaj cov ncov thiab hav uas muaj me me nyob thoob plaws saum npoo yog hu ua roughness ntawm qhov chaw.Qhov no yog tshwm sim los ntawm kev khawb tawm los ntawm cov cuab yeej ntawm qhov chaw nyob rau hauv chav kawm ntawm kev tsim khoom, thiab qhov deformation tshwm sim los ntawm cov yas ntawm cov hlau nto hauv cov txheej txheem ntawm kev txiav thiab txiav thiab sib cais.
Qhov roughness ntawm qhov chaw kuj yog qhov qhia txog kev tshawb fawb los ntsuas qhov zoo ntawm qhov chaw.Nws cuam tshuam rau cov khoom ntawm cov khoom, lawv qhov sib txuam raug, hnav tsis kam tiv thaiv corrosion, sealing tsos thiab tsos.ntawm cov khoom.
❖ Nto roughness codes cim, cim thiab cim
Cov ntaub ntawv GB / T 131-393 qhia txog qhov roughness code raws li nws cov txheej txheem sau tseg.Cov cim uas qhia txog qhov roughness ntawm cov khoom saum npoo ntawm daim duab yog teev nyob rau hauv cov lus hauv qab no.
❖ Kev ntsuam xyuas tus thawj coj ntawm qhov roughness ntawm qhov chaw
Cov kev ntsuas siv los ntsuas qhov roughness ntawm qhov chaw saum npoo yog:
1.) Arithmetic txhais tau tias sib txawv ntawm contour (Ra)
Tus lej lej ntawm tus nqi tsis txaus ntawm qhov contour offset hauv qhov ntev.Qhov tseem ceeb ntawm Ra thiab qhov ntev ntawm cov qauv yog qhia hauv cov lus no.
2.) Qhov siab tshaj plaws ntawm qhov profile (Rz)
Lub sijhawm ua piv txwv yog nws yog qhov sib txawv ntawm qhov contour ncov cov kab saum toj thiab hauv qab.
Nco ntsoov: Ra parameter yog nyiam thaum siv.
❖ Cov kev cai rau kev sau npe ntawm qhov roughness
1.) Ib qho piv txwv ntawm code labeling los qhia roughness ntawm qhov chaw.
Qhov saum npoo roughness qhov siab qhov tseem ceeb Ra, Rz, thiab Ry yog sau los ntawm tus lej qhov tseem ceeb hauv txoj cai, tshwj tsis yog tias nws muaj peev xwm tawm ntawm qhov parameter code Ra tsis tas yuav tsum nyob rau ntawm qhov tsim nyog tus nqi rau parameter Rz lossis Ry yuav tsum raug txheeb xyuas ua ntej. rau tej qhov tseem ceeb parameter.Mus saib Table rau ib qho piv txwv ntawm yuav ua li cas sau npe.
2.) Cov txheej txheem ntawm kev kos cov cim thiab cov lej ntawm qhov chaw ntxhib
❖ Kuv yuav ua li cas kos qhov roughness ntawm cov cim saum npoo ntawm cov duab kos
1.) Lub roughness ntawm qhov chaw (cim) yuav tsum tau muab tso nrog cov contour kab pom los yog dimension kab, los yog nyob rau hauv lawv extension kab.Lub ntsiab lus ntawm lub cim yuav tsum taw tes los ntawm sab nrauv ntawm cov khoom thiab mus rau saum npoo.
2.).
Ib qho piv txwv zoo ntawm kev kos roughness ntawm qhov chaw
Tib daim duab yog siv rau txhua qhov chaw feem ntau yog cim siv tsuas yog ib tiam (cim cim) thiab ze tshaj rau qhov dimension.Yog tias thaj chaw tsis loj txaus lossis nyuaj rau kos, nws tuaj yeem kos kab.Thaum txhua qhov chaw ntawm ib yam khoom ua tau raws li qhov yuav tsum tau ua rau saum npoo roughness cov cim tuaj yeem ua kom sib npaug ntawm sab xis ntawm koj daim duab.Thaum feem ntau ntawm qhov chaw ntawm ib daim qhia tib qhov chaw roughness specifications, feem ntau nquag ua hauj lwm code (cim) yog nyob rau tib lub sij hawm, sau qhov no nyob rau hauv lub Upper sab laug cheeb tsam ntawm koj daim duab.Tsis tas li ntawd, suav nrog "so" "so".Qhov luaj li cas ntawm txhua qhov sib txawv ntawm qhov chaw roughness cim (cov cim) thiab cov lus piav qhia yuav tsum yog 1.4 npaug ntawm qhov siab ntawm cov cim ntawm daim duab.
Qhov roughness ntawm qhov chaw (cim) ntawm qhov tsis tu ncua nkhaus ntawm cov khoom, qhov saum npoo ntawm cov khoom uas tau rov ua dua (xws li cov hniav, qhov grooves, qhov los yog zawj. pom ib zaug xwb.
Yog hais tias muaj ntau yam specifications rau nto roughness rau tib cheeb tsam ib yam nkaus cov khoom nyias yuav tsum tau kos los kos cov kab sib faib thiab qhov tsim nyog roughness thiab qhov ntev yuav tsum tau sau tseg.
Yog tias nws tau txiav txim siab tias cov hniav (cov hniav) zoo tsis tau taug qab ntawm cov xov, cov iav lossis lwm yam iav.Qhov roughness ntawm tus lej deg (cim) tuaj yeem pom hauv daim duab.
Cov lis dej num roughness rau qhov chaw ua hauj lwm ntawm lub hauv paus qhov, sab ntawm lub keyway fillets thiab chamfers yuav yooj yim rau cov txheej txheem ntawm labeling.
Yog tiascnc milled qhov chawyuav tsum tau kho nrog cov cua sov los yog ib feem coated (coated) tag nrho cheeb tsam yuav tsum tau cim nrog tuab kab ntawm dotted kab, thiab qhov ntev uas sib haum mus rau nws yuav tsum tau kom meej meej cim.Cov lus qhia tshwj xeeb tuaj yeem tshwm sim ntawm kab kab rov tav raws ntug ntev ntawm lub cim roughness nto.
Basic tolerances thiab standard deviations
Kom pab tau ntau lawm cia interoperability ntawmcnc machined Cheebtsamthiab ua tau raws li cov kev cai sib txawv ntawm kev siv, tus qauv hauv tebchaws "Limits and Fits" qhia tias thaj tsam kam rau ua muaj ob yam uas yog tus qauv kam rau ua thiab qhov sib txawv ntawm qhov pib.Tus qauv kam rau ua yog qhov txiav txim siab loj npaum li cas thaj tsam ntawm kev kam rau siab thiab qhov kev sib txawv hauv paus txiav txim siab thaj tsam ntawm qhov kam rau ua.
1.) Standard Tolerance (IT)
Qhov zoo ntawm Standard kam rau ua yuav raug txiav txim los ntawm qhov loj ntawm lub hauv paus thiab cov chav kawm.Chav kawm kam rau ua yog ib qho kev ntsuas uas txhais tau qhov tseeb ntawm kev ntsuas.Nws tau muab faib ua 20 qib, tshwj xeeb yog IT01, IT0 thiab IT1., ..., ib 18.Qhov tseeb ntawm qhov ntsuas qhov ntev txo qis thaum koj txav los ntawm IT01 txog IT18.Yog xav paub ntxiv txog cov qauv rau cov qauv kam rau ua, xyuas cov qauv tsim nyog.
Basic Deviation
Kev sib txawv hauv paus yog qhov sib txawv ntawm sab sauv lossis qis dua piv rau xoom hauv cov qauv txwv, thiab feem ntau yog hais txog kev sib txawv ze rau xoom.Qhov kev sib txawv ntawm qhov yooj yim yog qis dua thaum thaj tsam kam rau siab yog siab dua li xoom kab;txwv tsis pub nws yog sab sauv.Lub 28 qhov sib txawv ntawm qhov yooj yim yog sau ua cov tsiaj ntawv Latin nrog rau lub qhov thiab tus lej qis los sawv cev rau cov ncej.
Ntawm daim duab ntawm qhov sib txawv yooj yim, nws yog qhov tseeb tias qhov sib txawv ntawm qhov sib txawv AH thiab ncej qhov sib txawv ntawm kzc sawv cev rau qhov sib txawv qis.Lub qhov sib txawv ntawm KZC sawv cev rau sab sauv sib txawv.Lub sab sauv thiab sab qis sib txawv rau lub qhov thiab ncej yog feem + IT / 2 thiab -IT / 2.Daim duab sib txawv yooj yim tsis qhia qhov loj ntawm kev kam rau siab, tab sis tsuas yog qhov chaw ntawm nws.Tus qauv kam rau ua yog qhov sib txawv ntawm qhov qhib ntawm qhov kawg ntawm ib cheeb tsam kam rau siab.
Raws li lub ntsiab lus ntawm qhov ntev ntawm qhov tolerances, cov qauv kev suav rau qhov sib txawv thiab cov qauv yog:
EI = ES + ES
ei=es+IT or es=ei+IT
Qhov kam rau ua cheeb tsam code rau lub qhov thiab ncej yog ua los ntawm ob tug codes: qhov yooj yim deviation code, thiab qhov tolerance tsam qib.
Koom tes
Haum yog qhov kev sib raug zoo ntawm thaj tsam kam rau ntawm lub qhov thiab cov shafts uas muaj tib qhov loj me me thiab sib xyaw ua ke.Qhov haum ntawm lub ncej thiab lub qhov tuaj yeem nruj lossis xoob nyob ntawm daim ntawv thov.Yog li ntawd, lub teb chaws tus qauv qhia txog ntau hom kev haum:
1) Clearance haum
Lub qhov thiab ncej yuav tsum haum ua ke nrog qhov tsawg kawg nkaus clearance ntawm xoom.Lub qhov tolerance zone yog siab tshaj qhov siab kam rau ua zone.
2) Kev hloov pauv kev koom tes
Tej zaum yuav muaj qhov sib txawv ntawm cov ncej thiab lub qhov thaum lawv sib dhos.Lub qhov tolerance tsam overlaps ntawm lub ncej.
3) Interference haum
Thaum sib sau cov ncej thiab lub qhov, muaj kev cuam tshuam (xws li kev cuam tshuam tsawg heev sib npaug rau xoom).Qhov kam rau ua rau lub taub hau yog qis dua qhov kam rau ua rau lub qhov.
❖ Benchmark system
Hauv kev tsim khoom ntawmcnc machined qhov chaw, ib feem yog xaiv raws li ib tug datum thiab nws deviation yog paub.Lub datum system yog ib txoj hauv kev kom tau txais ntau hom kev haum nrog cov khoom sib txawv, los ntawm kev hloov qhov sib txawv ntawm lwm qhov uas tsis yog datum.Lub teb chaws cov qauv qhia ob lub qauv ntsuas raws li qhov yuav tsum tau ua tiag tiag.
1) Lub hauv paus qhov system yog qhia hauv qab no.
Qhov yooj yim qhov system (tseem hu ua qhov yooj yim qhov system) yog ib qho system uas qhov kev kam rau siab ntawm ib lub qhov uas muaj qee qhov sib txawv ntawm tus qauv thiab qhov kam rau ua ib qho ntawm cov ncej uas muaj qhov sib txawv ntawm cov qauv sib txawv.Hauv qab no yog cov lus piav qhia ntawm qhov yooj yim qhov system.Saib rau daim duab hauv qab no.
①Basic qhov system
2) Lub hauv paus ncej system yog qhia hauv qab no.
Basic shaft system (BSS) - Qhov no yog ib qho system uas qhov kam rau ua ib cheeb tsam ntawm ib tug ncej thiab ib lub qhov, txhua tus nrog ib tug txawv yooj yim deviation, tsim ntau yam haum.Hauv qab no yog cov lus piav qhia ntawm lub hauv paus axis system.Datum axis yog lub axis nyob rau hauv lub hauv paus axis.Nws qhov kev sib txawv yooj yim code (h) yog h thiab nws qhov sib txawv sab saud yog 0.
②Basic ncej system
❖ Txoj Cai ntawm kev koom tes
Fit code yog tsim los ntawm qhov kam rau ua zones code rau lub qhov thiab ncej.Nws yog sau nyob rau hauv fractional daim ntawv.Qhov kam rau ua cheeb tsam code rau lub qhov yog nyob rau hauv tus lej, thaum lub kam rau ua code rau lub ncej yog nyob rau hauv lub denominator.Ib qho axis yog ib qho kev sib xyaw ua ke uas muaj h ua tus lej.
❖ Kos qhov kam rau ua thiab haum rau cov duab kos
1) Siv cov cim kev sib koom ua ke los cim kev ua siab ntev thiab haum rau ntawm daim duab sib dhos.
2) Ob hom kev kos npe sib txawv yog siv raumachining qhov chawkos duab.
Geometric kam rau ua
Muaj qhov yuam kev geometrical thiab qhov yuam kev hauv kev sib koom ua ke tom qab cov khoom tau ua tiav.Lub tog raj kheej tej zaum yuav muaj qhov tsim nyog loj tab sis yuav loj dua ntawm ib qho kawg dua li lwm qhov, los yog tuab dua hauv nruab nrab, thaum nyias nyias ntawm qhov kawg.Nws kuj tseem yuav tsis yog puag ncig hauv ntu ntu, uas yog qhov yuam kev.Tom qab ua tiav, cov axes ntawm txhua ntu tuaj yeem sib txawv.Qhov no yog qhov yuam kev ntawm qhov chaw.Cov duab kam rau ua yog qhov kev hloov pauv uas tuaj yeem ua rau ntawm qhov zoo tagnrho thiab cov duab tiag tiag.Txoj hauj lwm kam rau ua yog qhov kev hloov pauv uas tuaj yeem ua ntawm qhov tseeb thiab qhov zoo tshaj plaws.Ob leeg yog hu ua geometric tolerances.
Bullets nrog Geometric Tolerance
❖ Kev zam txim rau cov duab thiab txoj haujlwm
Lub teb chaws tus qauv GB / T1182-1996 qhia txog kev siv cov lej los qhia cov duab thiab txoj haujlwm kam rau ua.Thaum lub geometric kam rau ua tsis tuaj yeem raug cim los ntawm tus lej hauv kev tsim khoom tiag tiag, cov ntawv piav qhia tuaj yeem siv tau.
Geometric tolerance codes muaj xws li: geometric tolerance thav duab, kab lus qhia, geometric kam rau ua qhov tseem ceeb, thiab lwm yam cim.Tus font loj nyob rau hauv tus ncej muaj qhov siab tib yam li tus font.
❖ Geometric kam rau ua cim
Cov ntawv nyob ze ntawm geometric kam rau ua nyob rau hauv daim duab tuaj yeem muab ntxiv los piav qhia lub tswvyim rau tus nyeem ntawv.Nws tsis tas yuav suav nrog hauv daim duab.
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Post lub sij hawm: Nov-29-2023