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1、1.0PurposeTodefineacceptabilityandrejectstandardforworkmanshipintheSheetMetalDepartment.2.0ApplicabilityThisprocedureappliestoallpartsmanufacturedintheSheetMetalDepartmentaswellasthosepurchasedfromoutsidevendors.3.0Definitions3.1Scratches:3.1.1LightScratch
2、es:nShinnyscrapesinappearanceapproximatelythethicknessofahairindiameter.Typicallycannotbefeltwithafingernail.nWhenpainted,thescratcheswillnotshowthroughthepaint.3.1.2DeepScratches:nShinnyinappearance,cuttingintometalsurfacesandwiderthanalightscratch.Typica
3、llycanbefeltwithafingernail.nCharacterizedasascrapeinthemetalsurface,beforepainting,thatwillshowthoughthepaint.3.2Metal:3.2.1SlugMarks:nImpressionsonthesurfaceofrawmetalpartscausedbyscrapmetalbeingpresentinthedie.3.2.2Dents:nIndentationsinthemetalthataresm
4、all,localizedandsurroundedbyaslopingdepression.3.2.3CoilBreaks:nAcontinuouslinethatcreatesadepressiontheentirelengthofthepartinonedirection.3.2.4Burr/SharpEdge:nAsharproughorraggededgeleftaftertheparthasbeenstamped,cut,trimmedorpunchedthatexceedstheUL1439S
5、tandard.3.2.5DrawMarks:nMarkingsonthemetalcreatedasthepartisdrawninthedie.3.2.6SurfaceRust:nAreddishbrownpowderlikeresiduethatiseasilyremovedwhenwiped.3.2.7PittedRust:nAreddishbrownresiduethatfeelsroughonthesurfaceinquestion.Moresevereandadvancedthansurfac
6、erust.3.2.8MetalFlaking(De-lamination):nAflatpieceorlayerthathasseparated,suchastheGalvanizedCoatingseparatingfromthesteel.3.2.9ThicknessVariation:nVariationswithinthemillcoil,eitherfromendtoendorsidetosidefoundwhenmeasuringamillcoilforthicknessconformance
7、.Specificationsindicateacceptablethicknessrange.3.2.10DrawRipples:nDescribedasripplesinthemetalafterdrawing,causedbythemetalorbydrawing.3.2.11WavyMetal:nUsually,thisconditionisfoundinthemetalfromthemill.However,itcanbeproducedatthepress.Forexample,overload
8、edrollscandeflectandputanedgewaveintothecoil.3.2.12MillMarking:nTrademarkofmanufacturer,country,origin,and/orotherprintorletteringthatmightbeappliedtothemetalsurfaceasidentification.4.0DescriptionofSurfaces“A
