UNI 10569-份意大利标准.pdf

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1、ITALIANNORMUNI10569PRESSUREDIECASTINGSOFApril1996ALUMINIUMALLOYSGeneraltolerancesDescriptors:Aluminiumalloy,pressurediecasting,castinggatesandvents,machiningallowance,dimensionaltolerance,geometrictoleranceICSClassification:77.120.10;77.140.90Summary:Thisnormdeterminesthedimensionalandge

2、ometrictolerancesofpressurediecastings,castingpointsandmachiningallowances.Itappliestodrawingdimensionswithoutspecificindicationsoftolerances.ReferenceInstitute:UNIMET–StandardizationofNonFerrousMetalsApprovedby:UNIPresident,24.04.1996INDEX0INTRODUCTION1SCOPEANDFIELDOFAPPLICATION2REFEREN

3、CES3DEFINITIONSFig.1ExamplesoffrontareasofapressurediecastingFig.2Examplesofareasofmovablepartsofapressurediecasting4TOLERANCES4.1LineardimensionsFig.3CalculationofthediagonaloftheoveralldimensionofacastingTable1TolerancesregardinglineardimensionsTable2Additionaltolerancesasafunctionofth

4、efrontareaofapressurediecastingTable3Additionaltolerancesasafunctionoftheareaofthemovablepartofapressurediecasting4.2HolesTable4HoledepthFig.4HoletaperTable5Tolerancesregardingholeverticality4.3GeometrictolerancesTable6TolerancesregardingsurfaceflatnessTable7Tolerancesregardingparallelan

5、dverticalsurfacesFig.5Draftangle4.4Cylindricalsurfaces,coaxialandcircularitytolerancesTable8Coaxialtolerances4.5TolerancesregardingwallthicknessesTable9Tolerancesregardingwallthicknesses4.6Machiningallowances4.7EjectorsTable10Tolerancesregardingejectormarks4.8Roughnessofpressurediecastin

6、gsurfaces(informative)Table11Roughnessofpressurediecastingsurfaces4.9BurrsandcastinggatesandventsTable12Gatesburrs0INTRODUCTIONThetolerancesindicatedinthisstandardaretechnicalinformationtobeusedbyPurchaserandcastingSupplier.BothPurchaserandSuppliershalldefinetherequesteddegreeofaccuracyt

7、akingintoconsiderationtheeconomicalfactors.Thegeneraltolerancesindicatedinthisstandard,dividedintothreeclassesofaccuracy,correspondtothetechnicalcapacitiesofthepressurediecastingprocessandrefertorawcastingsbeforebeingprocessed.1SCOPEANDFIELDOFAPPLICATIONThisstandarddefine