美国机械制图标准简介

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1、㄀1义݅82义COMMONSYMBOLS/䗮⫼ヺোShownbelowarethemostcommonsymbolsthatareusedwithgeometrictolerancingandotherrelateddimensionalrequirementsonengineeringdrawings.NotethecomparisonwiththeISOstandards.Mostofthesymbologyisidentical.ThereareafewsymbolsthatareusedintheASMEY14.5,1

2、994standardthatarebeingproposedfortheISOstandards.Thesymbolsmarkedwithan“x”areneworrevisedfromthepreviousY14.5M,1982standard./ҹϟᰒ⼎ⱘᰃ᳔䗮⫼ⱘヺোˈ೼Ꮉ⿟೒Ёˈᅗ੠޴ԩ݀Ꮒঞ݊ᅗⳌ݇ⱘሎᇌ㽕∖㘨ড়Փ⫼DŽϟ㸼ৠᯊ߫ߎISOᷛޚЁⳌᑨⱘヺোDŽ㒱໻䚼ߚヺো㸼⼎ᰃϔḋⱘDŽϔᇥ䚼ߚASMEY14.5,1994ᷛޚ⣀᳝ⱘヺোˈℷ㹿ᦤ䆂⫼ѢISOᷛޚDŽᷛ䆄ⴔ“x”ⱘヺোᰃᮄⱘ៪㗙ᰃ⬅ҹࠡⱘY14.5M,1982ᷛ

3、ޚ䅶ⱘDŽSYMBOL˄ヺো˅ASMEY14.5MISOFEATURECONTROLFRAME݀ᏂḚḐDIAMETER/ⳈᕘSPHERICALDIAMETER/⧗ⳈᕘATMAXIMUMMATERIALCONDITION᳔໻ᅲԧᴵӊATLEASTMATERIALCONDITION᳔ᇣᅲԧᴵӊREGARDLESSOFFEATURESIZENONE/ҔМг≵᳝NONE/ҔМг≵᳝ᗑ㾚⡍ᕕሎᇌPROJECTEDTOLERANCEZONEᡩᕅ݀ᏂᏺXFREESTATE/㞾⬅⢊ᗕXTANGENTPLANE(Proposed)˄㹿ᦤ䆂ⱘ˅Ⳍߛ

4、䴶XSTATISTICALTOLERANCENONE/ҔМг≵᳝㒳䅵݀ᏂXRADIUS/ञᕘRRXCONTROLLEDRADIUS/㑺ᴳञᕘCRNONE/ҔМг≵᳝SPHERICALRADIUS/⧗ञᕘSRSRBASICDIMENSION/෎ᴀሎᇌ(theoreticallyexactdimensioninISO)˄ISOЁ⧚䆎Ϟ㊒⹂ⱘሎᇌ˅XDATUMFEATURE෎ޚ⡍ᕕ**DATUMTARGET෎ޚⳂᷛTARGETPOINT/෎ޚ⚍DIMENSIONORIGINሎᇌॳ⚍REFERENCEDIMENDION/খ㗗ሎᇌ(50

5、)(50)(AuxiliarydimensioninISO)/ISOЁ䕙ࡽⱘሎᇌ1㄀2义݅82义NUMBEROFPLACES/໘᭄8x8xCOUNTERBORE/SPOTFACE䬫≝༈ᄨ/ᄨষᑇ䴶COUNTERSINK/䪏≝༈ᄨDEPTH/DEEP/⏅ᑺSQUARE/ℷᮍᔶALLAROUND/਼ܼNONEDIMENSIONNOTTOSCALEሎᇌ≵ᣝ↨՟ARCLENGTH/೚ᓻ䭓ᑺXBETWEEN/೼ϸ㗙П䯈NONESLOPE/᭰䴶CONICALTAPER/䫹ᔶENVELOPEPRINCIPLENONE(implied)/˄ᱫ

6、ᣛ˅ࣙ㒰㒓ॳ⧚Note:*Maybefilledornotfilled/⊼˖*ৃ㛑฿ᅲгৃ㛑ϡ฿ᅲRADIUS,CONTROLLEDRADIUS/ञᕘˈ㑺ᴳञᕘTherearetwotypesofradiitolerancethatcanbeapplied,theradiusandcontrolledradius.Theradius(R)toleranceisforgeneralapplications.Thecontrolledradius(CR)isusedwhenitisnecessarytoplacefurtherre

7、strictionsontheshapeoftheradius,asinhighstressapplications./᳝ϸ⾡㉏ൟञᕘ݀Ꮒ㛑㹿ᑨ⫼˖ञᕘ੠㑺ᴳञᕘDŽञᕘ˄R˅݀Ꮒᰃ䗮⫼ⱘDŽ㗠㑺ᴳञᕘ(CR)߭⫼Ѣ䳔㽕ᇍञᕘⱘᔶ⢊԰䖯ϔℹⱘ㑺ᴳᯊˈ԰Ўϔ⾡催ᑨ࡯ⱘᑨ⫼DŽNote:ThisisachangefromthepreviouseditionsoftheY14.5standard.Thedefinitionofthetolerancezonefortheformertermtangentradius,previouslyn

8、otedbythesymbolR,isnowmeanttoapplytoacontrolledradius(symbolCR)./⊼˖䖭ϾᰃҢY14.5ᷛޚҹࠡⱘ⠜ᴀᬍব㗠ᴹⱘDŽܜࠡⱘᴃ䇁Ⳍߛञᕘⱘ݀ᏂᏺᅮНˈҹࠡ⫼ヺোR㸼⼎ˈ⦄೼⫼㑺ᴳञᕘ˄ヺোCR˅㸼⼎DŽ2㄀3义݅82义