Ford-某汽車GDT形位公差培訓(xùn)材料-全集(共116張)

GD&TforBody1GD&TforBodyEngineeringCoursecontent

課程內(nèi)容IntroductiontoGD&TGD&T介紹5StepProcess5步方法2GD&TforBodyEngineeringIntroduction

介紹WhatisGD&T什么是GD&THowitaffectsFordMotorCompany它如何讓影響福特汽車公司3GD&TforBodyEngineeringWhatisGD&T

什么是GD&TGeometricDimensioningandTolerancingisatechnicaldatabasethroughwhichourProductDesignandManufacturingOrganisationscantalktooneanotherviaProductData,whetheronpaperorthecomputergraphicsscreen

幾何尺寸公差是貫穿我們產(chǎn)品設(shè)計(jì)和生產(chǎn)制造的技術(shù)數(shù)據(jù)基礎(chǔ)，無論是通過圖紙或者是計(jì)算機(jī)上的圖表，我們都能通過產(chǎn)品數(shù)據(jù)與其他人溝通。Itistheengineeringproductdefinitionstandardthatgeometricallydescribesdesignintentandprovidesthedocumentationbaseforthedesignofthequalityandproductionsystem.

工程產(chǎn)品定義標(biāo)準(zhǔn)，幾何尺寸描述設(shè)計(jì)意圖，并為品質(zhì)設(shè)計(jì)和產(chǎn)品系統(tǒng)提供文件基準(zhǔn)。ItisatechniqueofcommunicationbetweenProductEngineeringandManufacturingEngineeringthatpromotesauniforminterpretationoftherequirementsformakingacomponent.它是一種在產(chǎn)品工程和制造工程之間的技術(shù)交流，并促成一種針對零部件制造要求的唯一的解釋。4GD&TforBodyEngineeringWhatisGD&T

什么是GD&TGDTprovidesthedimensionsofthecomponentandthetolerancesinalanguagethateliminatesconfusingandinconsistentnotes,datumlines,andlocationpointidentifications,andreplacesthemwithstandardsymbolsthatrefertoauniversalcode.GDT提供部件的尺寸和公差，用一種語言，它能夠消除混淆和不一致的注釋，基準(zhǔn)線，定位點(diǎn)辨認(rèn)，并且用與一種通用的代碼相關(guān)的標(biāo)準(zhǔn)符號替換他們。

Thiscodedescribesthedimensionsandtolerancesofthecomponentwithreferencetotherelationshipsofthefeaturestoeachotherandtheirfunctionalinterfaceswithmatingparts,assemblies,etc.代碼描述了關(guān)于部件間相互關(guān)系的特征的尺寸和公差，和他們匹配的部件的功能界面，總成等。5GD&TforBodyEngineeringAuthorisation

批準(zhǔn)6GD&TforBodyEngineeringApplicationTheapplicationofGDTisinitiallytheresponsibilityoftherelevantComponentEngineer,howeverteamworkisthekeytothecorrectapplicationthroughthecomponentCoreTeam.

Thisprovidestheopportunityforalldisciplinestocontributetheirpartofthetotaldesignpackage.

Itensurespartdatawillsatisfydesignintentaswellasmanufacturingandinspectionrequirementsbasedonfunction,machinecapabilityandavailabletechnology.7GD&TforBodyEngineeringApplicationItprovidestheopportunityforproperDatumselectionandhasthepotentialtosignificantlyreduceproductchanges,especiallythosechangesfollowingfinalproductrelease.

TheCoreTeamshouldconsistataminimumofrepresentativesfromProductEngineering,DesignEngineering,ManufacturingEngineering,andQualityEngineering.8GD&TforBodyEngineeringMoreinformation9GD&TforBodyEngineeringHowGD&TRelatestoFordThecorrectapplicationhasthepotentialto;InfluenceFitandFinishReduceReworksIncreaseReliabilityAffectsAssemblyProcessReducecost10GD&TforBodyEngineeringThe5StepProcess1234511GD&TforBodyEngineering5StepProcess1 UtilisethenewDesignConcept2 EstablishmentoftheDatumReferenceFrame3 EstablishGD&TControls4 EstablishTolerances5 FinalApprovalofGD&TonCadData12GD&TforBodyEngineeringStep1Utilisenewdesignconcept13GD&TforBodyEngineeringUtilisenewdesignconceptThe1ststepinvolvesmakingdecisionsatthebasicdesignstagethatwillultimatelyeffectthedesign,manufactureandverificationofthefinalcomponent.

ThiscanonlybesuccessfullyachievedbytherelevantPDrepresentativeattendingtheMasterControlPlan(MCP)Meetings.14GD&TforBodyEngineeringMasterControlPlanWhatisthepurposeoftheMCPmeetinginrelationtoPDToestablishacommonunderstandingfortheverificationprocessofthemajorpanels,e.g.Bodyside,Hood,DeckLid,Door,Roof,Underbody,etc.Toobtainagreementatanearlystageofthedesignforthedatumreferenceframe,dieapproach,etc.

WhoattendstheMeetingPDandManufacturing,i.e.BodyEngineering,DCD,Stamping,BodyandAssembly.15GD&TforBodyEngineeringMasterControlPlanWhenshouldtheMeetingtakeplace.Initialdesignconceptstage,knowingthecomponentsparameterssuchassizeandfunction

Currentmethodsuse;Pastevidence,pastexperience,cansometimeshinderratherthanassistthenewdesignconcept

ResultofmeetingMaybedocumentedinCAD,orpaperform16GD&TforBodyEngineeringStep2EstablishDatumReferenceFrame17GD&TforBodyEngineeringEstablishDatumReferenceFrameAspartoftheMasterControlPlan(MCP)Processmeeting,BodyEngineeringandManufacturingagreedtothedefinitionoftheDatumFeaturesandtheirlocation.

PDhaveOwnershipoftheDatumFeatures.18GD&TforBodyEngineeringDatumReferenceFrame

(ReferencePocketGuide,Page8)ConsistsofasetofthreemutuallyperpendicularplanesThereferenceframeexistsintheoryonlyandisnotonthepartSufficientdatumfeaturesareusedtopositionthepartinrelationtotheDatumReferenceFrame.19GD&TforBodyEngineeringDatumFeaturesAnactualfeatureofthepartusedtostage/positionthepartintheequipmentforpurposesofrelatingitsgeometrytotheDatumReferenceFrame.20GD&TforBodyEngineeringPrimaryDatumPlaneAchievedbyestablishingaminimumofthreePointstodefineaplane

21GD&TforBodyEngineeringPrimaryDatumPlanePrimaryDatumPlaneshouldbeParalleltoDiePlane

22GD&TforBodyEngineeringPrimaryDatumPlaneWhenDatumTargetAreasdefiningPrimaryDatumPlanearenotononesingleplanarsurface,theymustbecontrolledonetoanotherusingthePROFILEofaSURFACEgeometriccontrol.23GD&TforBodyEngineeringSupportingapanelonlyonthedesignatedDatumTargetAreas,effectivelyremoves3degreesoffreedom,i.e.1Linearand2Rotational.24GD&TforBodyEngineeringDatumTargetAreasDatumTargetAreasshouldwhereverpossiblebeplanarandparalleltothedieplane.PrimaryDatumPlane25GD&TforBodyEngineeringDatumTargetAreasDedicatedDatumTargetAreasmakesboththepart,andgauge/fixturemorerobust,costeffectiveandImprovesrepeatability26GD&TforBodyEngineeringSecondaryDatumFeatureGenerallyaDatumFeatureofSizeisused,i.e.SinglecircularHole,positionedonasurfacethatisparalleltothePrimarydatumPlane,andisultimatelyusedasafourwaylocator.

27GD&TforBodyEngineeringSecondaryDatumFeatureControlledrelativetothePrimaryDatumPlaneusingtheGeometriccontrolPERPENDICULARITY.28GD&TforBodyEngineeringSecondaryDatumFeatureTheintersectionofthederivedaxisofthefeatureperpendiculartothePrimaryDatumPlane,andthedesignsideofthecomponentisthelocaloriginofallbasicdimensions;0,0,029GD&TforBodyEngineeringSupportingapanelonthedesignatedDatumTargetAreas,andusingthefourwaylocatorremovesanother2Lineardegreesoffreedom,resultinginall3Linear,and2Rotationaldegreesoffreedomconstrained.30GD&TforBodyEngineeringTertiaryDatumFeatureGenerallythewidthofa

SlottedFeatureofSize

isusedasa

twoway

locator.31GD&TforBodyEngineeringTertiaryDatumFeatureToeliminatetoleranceofDatumShiftononeofthetheoreticalaxisofthecartesiancoordinatesystem,theorientationoftheslot(length)shouldpointtotheaxisoftheSecondaryDatumFeature.32GD&TforBodyEngineeringTertiaryDatumFeatureTheslottedfeature’swidthmustbepositionedonasurfacewiththeslotwidthaxisparalleltotheprimarydatumplane,andcontrolledusingthegeometriccontrolofPOSITIONandnominatedastheTertiaryDatumFeature.33GD&TforBodyEngineeringSupportingapanelonthedesignatedDatumTargetAreas,usingthefourway,andtwowaylocatorsremovesallsixdegreesoffreedom.34GD&TforBodyEngineeringStep3EstablishGD&TControls35GD&TforBodyEngineeringCommonTermsandDefinitionsReferencePocketGuidePage236GD&TforBodyEngineeringMaterialConditionsMMC MaximumMaterialConditionLMC LeastMaterialConditionRFS RegardlessofFeatureSizeVirtualCondition37GD&TforBodyEngineeringMaximumMaterialConditionTheconditioninwhichafeatureofsizecontainsthemaximumamountofmaterialwithinthestatedlimitsofsize.

TheHeaviestPart

MinimumHoleDiameter(10.0)

MaximumShaftDiameter(11.0)M10.0+1.0038GD&TforBodyEngineeringLeastMaterialConditionTheconditioninwhichafeatureofsizecontainstheleastamountofmaterialwithinthestatedlimitsofsize.

TheLightestpart

MaximumHoleDiameter(11.0)

MinimumShaftDiameter(10.0)TodatenoapplicationintheFeatureControlFrameforthissymbolhasbeenidentifiedinBodyEngineering.L10.0+1.0039GD&TforBodyEngineeringRegardlessofFeatureSizeThereisnosymbolforRegardlessofFeatureSize.IfamaterialmodifierisnotusedthenRegardlessofFeatureSizeisassumed.

Thetermusedtoindicatethatageometrictoleranceordatumreferenceappliesatanyincrementofsizeofthefeaturewithinitssizetolerance

RegardlessofFeatureSizeisexpensivetoverify,andrarelyreflectstherelevantfeaturefunction,andthereforeshouldnotbeusedinaBodyapplicationwithouttheagreementoftheentirecoreteam.10.0+1.001.040GD&TforBodyEngineeringVirtualConditionAconstantBoundarygeneratedbythecollectiveeffectsofasizefeature’sspecifiedMMCorLMCmaterialconditionandthegeometrictoleranceforthatcondition.

TheVIRTUALCONDITIONoffeaturesofmatingpartsmustbematched,guaranteeingcomponentfeaturesattheirworstcaseforassemblywillalwaysassemble.

TheVirtualconditionenvelopeistheworstconditionofferedtothematingpart.41GD&TforBodyEngineeringVirtualCondition(Shaft)Virtualcondition(Shaft)=MMC+Tolerancezonevalue=12.0MMCLMCM1.010.0+1.0-0=10.0=11.0VirtualCondition42GD&TforBodyEngineeringVirtualCondition(Hole)MMCLMCM1.010.0+1.0-0=11.0=10.0VirtualConditionVirtualcondition(Hole)=MMC-Tolerancezonevalue=9.043GD&TforBodyEngineeringGeometricControlsReferencePocketGuidePage144GD&TforBodyEngineeringFeatureControlFrame

(ReferencePocketGuide,page3)MAB0.5MCMGeometriccharacteristicsymbols,thetolerancevalue,MaterialModifiers,andDatumsofReference,whereapplicable,arecombinedinafeaturecontrolframetoexpressageometrictolerance.45GD&TforBodyEngineeringGeometricCharacteristicSymbolMaterialConditionSymbolWhereapplicableMAB0.5MCMToleranceToleranceZoneShapewhereapplicableDatumReferenceLetters46GD&TforBodyEngineeringGeometricControlsEachfeatureofthecomponentmustbecontrolledforSIZE,FORM,ORIENTATIONandLOCATION.IntheAmericanNationalStandardtherearefourteengeometriccontrols.BodyEngineeringusejustthree;

1 PERPENDICULARITY

2 POSITION

3 PROFILE47GD&TforBodyEngineeringPERPENDICULARITYReferencePocketGuidePage2948GD&TforBodyEngineeringPERPENDICULARITYThemainApplicationforPERPENDICULARITYwithinBodyEngineeringistocontrolasingleSecondaryDatumFeatureofsize(ahole)tobeperpendiculartothePrimaryDatumPlane.Generallyusedonlyoncewithineachcomponenttodefinethesecondarydatumfeature.Anyotheruseofthiscontrol

forotherfeatureswouldbean

additionalrequirement,because

PERPENDICULARITYdoesnot

implyanylocation

49GD&TforBodyEngineeringLMCTheCylindrical

ToleranceZonediameterisdependantontheactualfeaturesizeBAPERPENDICULARITYMA019.0+0.10Acylindricaltolerancezoneperpendiculartoadatumplanewithinwhichtheaxisofafeaturemustlie.50GD&TforBodyEngineeringPOSITIONReferencePocketGuide

Page3351GD&TforBodyEngineeringPOSITIONDefinitionPositionToleranceZonesZeroatMMCConceptBoundaryConceptCompositeToleranceZonesProjectedToleranceZone52GD&TforBodyEngineeringThetermtodescribetheperfect(theoreticalexact)locationofindividualfeaturesinrelationshipwithadatumreferenceorotherfeature(s).

IngeneralthePOSITIONcontrolisusedtolocateuniformfeaturesofsize,e.g.holes,shafts,slotsetc.

POSITION53GD&TforBodyEngineeringVerificationAswithallFeaturesofSize;

Firsttobeverifiedisthatthetopandbottomlimitsofsizehavenotbeenviolated(Taylor’sPrinciple).AfullformcheckattheMMCandatwopointedinstrumentcheckattheLMC.

Secondlythefeature’s“Position”mustbeverified.

GD&Tdoesnotdictatethemethodofverification.Thedecisiononthegaugingtechniqueemployedistheresponsibilityofthecoreteam.54GD&TforBodyEngineeringPositionToleranceZones55GD&TforBodyEngineeringPositionalToleranceZone1

(Cylindrical)20.0+1.0

0TospecifyaCylindricalToleranceZone,adiametersignmustprecedethetolerancevalue,followedbythematerialModifierMMCunlessRegardlessofFeatureSizeisintended.M0.5Acylindricalzonewithinwhichthecentreaxisofafeatureofsizeispermittedtovaryfromitstrue(theoreticallyexact)position.56GD&TforBodyEngineeringPositionalToleranceZone2

(NonCylindrical)Azonewithinwhichthecentre,axis,ofcentreplaneofafeatureofsizeispermittedtovaryfromitstrue(theoreticallyexact)position.20.0+2.0

0ThetolerancevalueisfollowedbythematerialModifierMMCunlessRegardlessofsizeisintended.TospecifyatotalwidthToleranceZone,Nodiametersymbolprecedesthetolerancevalue.M0.557GD&TforBodyEngineeringBOUNDARYReferencePocketGuide

Page3758GD&TforBodyEngineeringBOUNDARYInBodyEngineeringcontrollingthecentreplaneofaslottedfeatureisrarelyapriority.59GD&TforBodyEngineeringAsnoDiametersymbolprecedesthepositionaltolerance,anoncylindricalzoneisinferred.BOUNDARYBOUNDARYBOUNDARYWhatweareinterestediniscontrollingtheBOUNDARYofthefeature.12.0+2.0

02.0M1.0M5.0+1.0

060GD&TforBodyEngineeringBOUNDARY5.0MMCWidthofHole

-1.0PositionalTolerance4.0WideBoundary4BOUNDARY1.0MBOUNDARY5.0+1.0

0VirtualCondition12.0MMCWidthofHole

-2.0PositionalTolerance10.0WideBoundary102.0M12.0+2.0

061GD&TforBodyEngineeringBOUNDARYNoportionoftheslotsurfacesarepermittedtoliewithintheareadescribedbytheVirtualConditionwhenthepartispositionedwithintheDatumReferenceFrameThePOSITIONcontrol+BOUNDARYcontrolsbothLocationandOrientation12.0+2.0

02.0MBOUNDARY1.0MBOUNDARY5.0+1.0

062GD&TforBodyEngineeringBOUNDARY12.0+2.0

02.0MBOUNDARY2.0MBOUNDARY5.0+1.0

0IfthesamePositionalTolerancevalueappliestoboththeLengthandWidthlimitsofsize,thentheFeatureControlFrameisseparatedfromtheLimitsofSize,andpointsdirectlytotheslottedfeature.63GD&TforBodyEngineeringBOUNDARY12.0+2.0

02.0MBOUNDARY5.0+1.0

0IfthesamePositionalTolerancevalueappliestoboththeLengthandWidthlimitsofsize,thentheFeatureControlFrameisseparatedfromtheLimitsofSize,andpointsdirectlytotheslottedfeature.64GD&TforBodyEngineeringBOUNDARYTheBOUNDARYnoteonlyappliestononcylindricalfeatures.ThePOSITIONcontrol+BOUNDARYcontrolsbothLocationandOrientationInthiscasethewordBOUNDARYmustbeaddedbelowtheFCFandthematerialModifierMMCspecifiedafterthePOSITIONtolerancevalue.NodiametersymbolprecedesthetolerancevalueintheFeatureControlFrameThepositionaltolerancespecifiedforthelengthmaydifferfromthatspecifiedforthewidth.ToSummarise65GD&TforBodyEngineeringZeroatMMCconceptReferencePocketGuidePage4466GD&TforBodyEngineeringZeroatMMCconceptTheZeroatMMCconceptappliesonlytofeatureswho’ssolefunctionisCLEARANCE67GD&TforBodyEngineeringM10.0L11.51.02.59.010.310.510.89.09.09.09.0ActualMatingEnvelopeToleranceZone(Dia)VirtualCondition10.0+1.50Whatisthesmallestdiameterholepermissible?Question?10AnswerExampleofcurrentspecificationM1.0AMMBC68GD&TforBodyEngineeringExampleofcurrentspecificationYesAnswerQuestion?Ifafeatureofthepartwasmeasured,andtheholewasfoundtobeDia9.6,wouldthispartbereject?M10.0L11.51.02.59.010.310.89.09.09.09.09.0ActualMatingEnvelopeToleranceZone(Dia)VirtualCondition10.0+1.50M1.0AMMBC69GD&TforBodyEngineeringExampleofcurrentspecificationBut,wouldtherejectedpartbefunctional?Question?AnswerTomakethepartacceptablewewouldneedtochangethedataspecification.10.0+1.50Ifthepartmeetsthefunctionalgaugerequirements,weknowthepartisfunctional.Theparthasbeenrejectedbecauseoffeaturesizealone.Thereforeitmusthavebeenmanufacturedtoatighterspecificationthanthatstatedonthedata.M1.0AMMBC70GD&TforBodyEngineeringExampleofcurrentspecificationWhatneedstochange?Question?Thespecificationfortheholeneedstochange,byadoptingthe“ZeroatMMC”conceptAnswerM10.0L11.51.02.59.010.310.89.09.09.09.09.0ActualMatingEnvelopeToleranceZone(Dia)VirtualCondition10.0+1.50M1.0AMMBC71GD&TforBodyEngineeringZeroatMMCconcept+2.509.0Example:Tocomplywiththe“ZeroatMMC”conceptforclearanceholes;TheSpecifiedvalueoftheFeatureofSizeismodifiedtoequaltheVirtualCondition,i.e.(MMC-PositionalTolerance).Thegeometrictolerancevalueisincorporatedintothefeatureslimitsofsize10.0+1.50M1.0AMMBCAzerotoleranceisspecifiedintheFeatureControlFrame,andthematerialmodifierMMCMUSTfollowthezerotolerancevalue.M0AMMBC72GD&TforBodyEngineeringM9.00ZeroatMMCconcept10.0L11.51.02.59.09.010.39.09.010.89.09.0ActualMatingEnvelopeToleranceZone(Dia)VirtualCondition9.09.09.09.0TheZeroatMMCconceptgivesManufacturingtheFULLrangeoftoleranceavailable,andsincetheMMCsizeisnowequaltotheVIRTUALCONDITION,noseparateMMCfeaturesizeverificationisrequired.(TaylorsPrinciple)TheLMCfeaturesizemuststillbefunctionallyderivedandverified9.0+2.50M0ABC73GD&TforBodyEngineeringThespecifiedFeatureofSizeisnotthetargetsizeformanufacturing.ZeroatMMCconceptThetoleranceavailableisdependantontheFeatureofSizeM9.00ThenearertheactualpunchsizeistotheLMC,thelargertheToleranceofPosition10.0L11.51.02.59.09.010.39.09.010.89.09.0ActualMatingEnvelopeToleranceZone(Dia)VirtualCondition9.09.09.09.0M09.0+2.50VIRTUALCONDITION&MMCLMCFEATURESIZE74GD&TforBodyEngineeringStandardPunchSizeM09.0+2.50PunchdiameterwillbeLMCminus0.1mmroundedupordownM9.0010.0L11.51.02.59.09.010.39.09.010.89.09.0ActualMatingEnvelopeToleranceZone(Dia)VirtualCondition9.09.09.09.015.2715.1715.212.7612.6612.711.511.411.4LMC-0.1mmExamplePunchDia.75GD&TforBodyEngineeringCompositePositionalTolerancesReferencePocketGuide

Page4576GD&TforBodyEngineeringCompositePositionalTolerances

(Forgroupsofholes)MA2.020.0+0.30M0.5MBMCA3xFIXHOLESTheuppersegmentisreferredtoasthe“PatternLocatingToleranceZoneFramework”(PLTZF)Thelowersegmentisreferredtoasthe“FeatureRelatingToleranceZoneFramework”(FRTZF)77GD&TforBodyEngineeringCompositePositionalTolerancesActualHoleFeatureRelatingtoleranceZoneMA2.0M0.5MBMCAPatternLocatingToleranceZone78GD&TforBodyEngineeringCompositePositionalTolerancesMA2.0M0.5MBMCA79GD&TforBodyEngineeringCompositePositionalTolerancesMA2.0M0.5MBMCAThecontrolrequiresthateachactualfeatureaxismustliewithinthespecifiedtolerancezonesofboththeupperandlowersegmentssimultaneously80GD&TforBodyEngineeringCompositePositionalTolerancesMA2.0M0.5MBMCAThecontrolrequiresthateachactualfeatureaxismustliewithinthespecifiedtolerancezonesofboththeupperandlowersegmentssimultaneously25.025.081GD&TforBodyEngineeringCompositePositionalTolerancesItsapplicationissupportedbytheentirecoreteam.

Thecontrolreflectsthepartfeaturemanufacturingprocess.

Itwillbeverifiedinfulldownstream.

Theadded-oncosttotheverificationprocessisjustifiedbytherequiredfeaturefunction.Beforespecifyingthiscontrolverifythat;82GD&TforBodyEngineeringProjectedToleranceZoneReferencePocketGuide

Page4383GD&TforBodyEngineeringProjectedToleranceZoneTheprojectedtolerancezoneprincipleshouldbeappliedtoassembliesthatcontainmatingpartsofsubstantialthicknessandareconstrainedwithfastenerssuchasscrewsintappedholes,studsordowelpins(termedfixedfasteners).84GD&TforBodyEngineeringFollowedbythedimensionindicatingtheminimumheightofthetolerancezoneProjectedToleranceZoneThePROJECTEDToleranceZoneisinvokedby

usingthesymbolintheFeatureControlFramePDIRECTIONOFPROJECTEDZONEM0.5P43.2ABMCMM12x1.75MINOR43.285GD&TforBodyEngineeringProjectedToleranceZoneTheProjectedToleranceZoneeffectivelytransfersthetolerancezonefrominsidethetappedhole/dowelholeoutintothespaceoccupiedbythebodyofthebolt/dowelpinafterassembly86GD&TforBodyEngineeringPROFILEReferencePocketGuide

Page2087GD&TforBodyEngineeringPROFILEProfileisthemostversatileandprobablythemostpowerfulofthegeometricControls.88GD&TforBodyEngineeringPROFILEThetrueprofileisdefinedbythetheoreticallyexactCADmodel(basicdimensions).89GD&TforBodyEngineeringPROFILECanbespecifiedwithorwithoutadatumofreferenceIfthecontrolhasnodatumofreferencethenthetolerancevalueappliestothefeaturestruebasicprofileandnoorientationorlocationisimplied.If

theprofilecontrolisreferencedtothedatumfeaturesofthecomponentthentheconsideredfeatureisfullycontrolledforsize,form,orientationandlocation90GD&TforBodyEngineeringPROFILEProfileisseparatedintotwotypesofcontrolsProfileofaLineProfileofaSurface

TherearethreemethodsofestablishingthetolerancezoneBilateral(Defaultunlessotherwisestated)UnilateralSpecialCase91GD&TforBodyEngineeringProfileofaLine2.0TheToleranceestablishesauniformtwo-dimensionalzonelimitedbytwoparallelzonelinesextendingalongthelengthoftheconsideredfeature.TheToleranceisappliedNormal/Perpendiculartothetrueprofileatallpointsalongtheprofile.TheactuallineelementmustliewithintheSpecifiedToleranceZone.2.0(Bilateral)92GD&TforBodyEngineeringProfileofaSurfaceTheToleranceestablishesauniformthree-dimensionalzonecontainedbetweentwoenvelopesurfacesseparatedbythespecifiedtolerance.Thezoneextendsalongthelengthandwidth,orcircumferenceoftheconsideredsurface.Thetoleranceisappliednormaltothetruebasicprofileoftheconsideredsurface.2.02.093GD&TforBodyEngineeringUnilateralTolerance2.0TOL.APPLIESINDIRECTIONLMCHOLE2.0TOL.APPLIESINDIRECTIONMMCHOLEBASICPROFILE2.094GD&TforBodyEngineeringUnilateralTolerance2.0TOL.APPLIESINMATERIALDIRECTIONMATERIALDIRECTIONToleranceZone95GD&TforBodyEngineeringUnilateralTolerance2.0TOL.APPLIESINOPPOSITEMATERIALDIRECTIONToleranceZoneMATERIALDIRECTION96GD&TforBodyEngineeringSpecialCase2.0TOL.SPLIT:1.5INDIRECTIONMMCBASICPROFILEHOLE97GD&TforBodyEngineeringSpecialCaseTOL.SPLIT:0.8INMATERIALDIRECTION0.8ToleranceZone1.2ToleranceZone2.0MATERIALDIRECTION98GD&TforBodyEngineeringElementLinesIf,asaresultoftherelevantsurfacefunctionitisnecessarytocontrolthesurfaceformwithatightertolerancethanthetoleranceofSIZE,FORM,ORIENTATIONandLOCATION,thenthefollowingmethodisrecommended99GD&TforBodyEngineeringElementLinesAB2.0MCM0.5ThisRepresentstwoseparatecontrols;TheupperFCFisthePROFILEoftheSurface,forSIZE,FORM,ORIENTATIONandLOCATIONcontrolsTheLowerFCFistheELEMENTLinesofthesurfaceFORMcontrol.NoLOCATIONorORIENTATIONisimplied(NoDatumsofReference)100GD&TforBodyEngineeringElementLinesAB2.0MCM2.0TrueBasicProfilePROFILEofaSurface3DtoleranceBoundaryforSIZE,FORM,ORIENTATIONandLOCATIONActualSurfacemustliewithinToleranceBoundary101GD&TforBodyEngineeringElementLinesAB2.0MCMPROFILEofaLine2DToleranceBoundarylocatedandorientedanywherewithinthe3DToleranceboundaryActualElementLineoftheSurfacemustliewithinbothtoleranceboundaries0.50.5102GD&TforBodyEngineeringElementLinesAB2.0MCMPROFILEofaLine2DToleranceBoundarylocatedandorientedanywherewithinthe3DToleranceboundaryActualElementLineoftheSurfacemustlie