GB1239.4-89标准（英文版）

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1、GB1239.4-89.NationalStandardofthePeople’sRepublicofChinaGB1239.4-89SupersedingGB1239-76HotCoiledHelicalSpringsTechnicalSpecifications1.ContentsandApplicationScopeThisStandardsetsforthtechnicalrequirements,testmethodsandinspectionrulesforordinarycoldcoiledhelicalsprings.ThisStandardisapplic

2、abletoallhotcoiledhelicalcompressionspringsandhotcoiledhelicaltensionspring(hereinafterreferredtoasSpring).ThisStandardisinapplicabletoanyspringwhichhasspecialperformance.2.NormativeReferenceGB224DeterminationofDepthofDecarburizationofSteelGB230MetallicMaterials-RockwellHardnessTestGB231Me

3、tallicMaterials-BrinellHardnessTestGB1222SpringSteelGB1239.5SamplingProceduresforInspectionbyAttributesofCoiledHelicalSpringsGB1805NomenclatureofSpringsGB4459.4MechanicalDrawings;ConventionalRepresentationofSprings3.ProductCategoryAsindicatedinTable1hereof,Springsaredividedintothefollowing

4、categoriesonthebasisofthestructure.Table1CategoryCodeSchematicDiagramEndStructureCompressionSpring(RY)RYⅠThe2endcoilscontactwitheachotherandaregroundflatRYⅡThe2endcoilsareflattenedandcontactwitheachother(groundflatornot)GB1239.4-89TensionSpring(RL)RLⅠSemicircularhookRLⅡCircularhookRLⅢCente

5、redcircularhook1.TechnicalRequirement4.1ProductshallmeettherequirementsasspecifiedinthisStandard,andshallbemanufacturedinaccordancewiththedesigndrawingandtechnicaldocumentswhichhavebeendulyapproved.4.2PermanentDeformationThepermanentdeformationofSpringwhichhasbeencompressed(stretched)witht

6、heTestLoadfor3timesmaynotexceed0.5%ofitsfreeheight.4.3SpringCharacteristicsandLimitDeviation4.3.1SpringCharacteristicsSpringcharacteristicsshallbeinconformitytotheprovisionsasspecifiedinArticle4.3.1.1orArticle4.3.1.2hereof,andshallbeinconformitytotheprovisionsasspecifiedinArticle4.3.1.3her

7、eofifsuchSpringisdesignformeetingspecialneeds.4.3.1.1ThedeformationofSpringundertheSet-heightLoadshallbe20%~80%ofthedeformationunderTestLoad.TestLoadPs:Forthepurposeofdeterminingspringcharacteristics,theTestLoadreferstothemaximumloadpermissibletobeundertakenby