GMW15777--Material-Specification

WORLDWIDEENGINEERINGSTANDARDSMaterialSpecificationPaintsGMW15777ExteriorPaintedPartsAppearanceRequirements©Copyright2009GeneralMotorsCorporationAllRightsReservedFebruary2009OriginatingDepartment:NorthAmericanEngineeringStandardsPage1of131Scope1.1MaterialDescription.Thisstandarddescribesthesurfaceappearanceandqualityrequirementsforexteriorpaintedparts.Therequirementsaredescribedintermsofappearanceattributesandsurfaceblemishesforeachzonewithinapart.ThepurposeoftheserequirementsistoensurethattheleveloffinalfinishonGMvehiclesmeetsorexceedsthelevelexpectedbyourcustomers.ThisstandardappliestobothfinishedpartsproducedbysuppliersandthosetopcoatedinGMassemblyplants.1.2Symbols.Notapplicable.1.3TypicalApplications.PaintedpartssuppliedtoGM.1.4Remarks.Notapplicable.2ReferencesNote:Onlythelatestapprovedstandardsareapplicableunlessotherwisespecified.2.1ExternalStandards/Specifications.ASTMD523VDA-16SAEJ3612.2GMStandards/Specifications.GM4364MGMW3059GMW30013Requirements3.1.PhysicalRequirements.Exteriorbodypartsaredividedintodifferentappearancezonestosetthequalityofeachzoneseparately(seeTable1).ZonedefinitionsAandBresemblethoseusedintheGMAssemblyPlantwhileC,D,andEareuniquetothisspecification.3.1.1PartZones.Foradetailedzonedefinitionofeachpart,referencetheappropriatepartdrawingormathdata.SeeFigureA1foranexample.ForGMNA,alsoreferenceGM4364M.Table1:PhysicalRequirementsZoneDescriptionA:VeryHighVisibilityAllveryhighlyvisibleexteriorsurfaces(horizontalandvertical)aboveanimaginarylinedrawnbetweenthetopofthefrontandrearbumpersasindicatedinAppendixA.Whenindoubt,ZoneAisanyarea50to190cmfromtheground.B:HighVisibilityAllhighlyvisibleexteriorsurfacesbelowanimaginarylinedrawnbetweenthetopofthefrontandrearbumpersasindicatedinAppendixA.Whenindoubt,ZoneBisanyarea0to50cmand190cmfromtheground.C:ModerateVisibilityModeratelyvisibleexteriorsurfaces.D:LowVisibilityRecessedsurfaces,clearlyindentedsurfaces.E:CoveredSurfacescoveredornotvisibletothecustomer.Non-topcoatedsurfacesorsurfaceshiddenintheinstalledposition.TherearenoZoneErequirementsinAppendixA,FigureA1.3.1.2InspectionPosition.Foraudits,thepaintedpartshallbeinspectedintheapproximatevehiclepositionandbeviewedatanapproximatedistanceof600mmfromtheobserver.3.1.3InspectionLighting.Inthedefectinspectionarea,thelightingintensityshallmeetorexceed100maintainedfoot-candlesor1100lux.Allhorizontalandverticalfluorescentsaretobecoolwhite,800milliamp,highoutput,and100Wbulbs.Forinspectionofswirlmarksandmottle,usenarrowangle,incandescentHalogenlights(60W12degrees)spacednomorethan30cmapart,30cmfromthepartsurfacetobeinspected,and50cmfromgroundlevel.Keepallotherlightingintheinspectionareatoaminimum.CopyrightGMWorldwideProvidedbyIHSunderlicensewithGMWLicensee=ReliableAnalysisInc/5955323001NotforResale,11/26/200900:19:51MSTNoreproductionornetworkingpermittedwithoutlicensefromIHS--```,,,`````````,``,,,`,,,````,-`-`,,`,,`,`,,`---GMW15777GMWORLDWIDEENGINEERINGSTANDARDS©Copyright2009GeneralMotorsCorporationAllRightsReservedPage2of13February20093.1.4InspectionforColorMatching.Forcolorevaluation,lightingshouldconformtoSAEJ361orVDA-16.Theinspectionareashallbepaintedalowreflectivitylightgreycolor.AmatchtoMunsellnumber8isrecommended.Munsellnumber8colorchipsareavailablefromMunsellColor/MacbethCorp.,2442N.Calvert,Baltimore,MD21218.3.1.5InspectionDevices.Thefollowinginspectiondevicesareapprovedforuseinmeasuringthefollowingappearanceattributes:3.1.5.1Color.GMColorStandardsorColorMasterscanbeobtainedfromThierryCorporation().3.1.5.2Gloss.BYK-Gardnerglossmeter,HunterDor-I-Gon,ATI,orequivalentperASTMD523.Startwiththe20setting.Iftheglossis≥60withthe20setting,continuetousethe20setting.If60gloss,changetothe60settingformeasurements.3.1.5.3OrangePeel.BYK-GardnerDOIModel4816andWaveScanMicro4846areapprovedforhighgloss(gloss60)only.BYK-GardnerDualWaveScanModelAW4840canmeasurehighandlowglossandispreferred.AvailablefromBYK-Gardnerat9104GuilfordRoad,Columbia,MD21046,Phone[phone].ForpartsthatcannotbemeasuredbytheBYK-Gardnerdualwavescanmeterduetosizeorshape,VisualOrangePeelstandardsmaybeobtainedfromACTLaboratories,Hillsdale,MI49242,[phone].3.1.5.4Dirt.DirtinspectiontemplatesmaybeobtainedfromQualityMetals,at(248)589-0505.3.1.6AdditionalRequirements.Appearancemustbeconsistentovertheentirepart.Maximumvariationonanyindividualpartforaspecificattributeisasfollows:3.1.6.1Gloss.SeeTableA1orpartsdrawing.3.1.6.2OrangePeel.SpecificvalueswillbedetailedintheStatementsofRequirements(SOR)andMathFilesforcomponentsandwillincluderequirementsforRvalueaswellasWb,Wc,andWd.SeeTableA1forminimumdefaultOrangePeelvaluesifnotspecifiedinVehicleTechnicalSpecification(VTS),SORandMathFiledocuments.ForRvalue,withinapanelorpart,amaximumofoneunitvariationwithina120mmspanisallowed.ForRvalue,betweenpanelsorpartsthatareorientedsimilarly(bothverticalandbothhorizontal),amaximumof1.5unitsvariationisallowed.SpecificvaluesinSORsorfromprogramteamsmaysupplementorsupersedethisrequirement.Valuesshallbeanaverageofthreepointsspreadoverthepart.Thevariationa