1/4
0/100
您的浏览器不支持进度条
下载所得到的文件列表
GBT 1804-92标准(英文版).doc
文档介绍:
NationalStandardofthePeople’sRepublicofChinaGeneraltoleranceGB/T1804-92ToleranceforlineardimensionswithoutindividualtoleranceindicationsreplacesGB1804-79Thisstandardadoptsthepart“Toleranceforlineardimensionswithoutindividualtoleranceindications”ofinternationalstandardISO2768-1:1989Generaltolerance–PartI:Tolerancesforlinearandangulardimensionswithoutindividualtoleranceindications.ThemecontentandscopeThisstandardspecifiesthegeneraltolerancegradandlimitdeviationforlineartolerance.Thisstandardisapplicabletometalcuttingdimensionsandgeneralpressingdimensions.Dimensionsofnonmetalmaterialandotherprocessmanufacturingmethodcanrefertothisstandard.Thelimitdeviationspecifiedinthisstandardisappliedtononfitdimensions.GeneraltoleranceconceptGeneraltolerancereferstothetolerancewhichcanbeguaranteedintheworkshopunderthenormalmanufacturingconditions.Thedimensionswithgeneraltoleranceneednotmarklimitdeviation.Generaltoleranceforlineardimensions3.1.Normallythegeneraltoleranceforlineardimensionsspecifiesfourtolerancegrades.LimitdeviationvalueoflineardimensionpleaseseeTable1;limitdeviationoffilletradiusandchamferheightdimensionspleaseseeTable2.3.2.Inordertospecifythelineardimensionswithoutindividualtoleranceindications,uracyshouldbeconsidered;takethetolerancegradespecifiedinthisstandard,andthedetailisspecifiedinrelatedtechnicaldocumentorstandard.Table1LimitDeviationValueofLinearDimensionmmTolerancegradeDimensionsections0.5~3>3~6>6~30>30~120>120~400>400~1000>1000~2000>2000~4000f(fine)±0.05±0.05±0.1±0.15±0.2±0.3±0.5-m(medium)±0.1±0.1±0.2±0.3±0.5±0.8±1.2±2c(coarse)±0.2±0.3±0.5±0.8±1.2±2±3±4v(mostcoarse)-±0.5±1±1.5±2.5±4±6±8ApprovedbyChinaStateBureauofTechnicalSupervisionFeb.09,1992ImplementedonOct.01,1992Table2LimitDeviationValueofFilletRadiusandChamferHeightmmTolerancegradeDimensionsections0.5~3>3~6>6~30>30f(fine)±0.2±0.5±1±2m(medium)c(coarse)±0.4±1±2±4V(mostcoarse)Note:MeaningoffilletradiusandchamferheightpleaseseenationalstandardGB6403.4(Partfilletandchamfer).ExpressmethodoflineardimensiongeneraltoleranceThestandardcodeandtolerancegradecodeshouldbemarkedifthegeneraltolerancespecifiesinthisstandardareusedindrawing,technicaldocumentorstandard.Forexample,toselectmediumgrade,itcanbeexpressedas:GB1804-mAnnexAConceptandfunctionoflineardimensiongeneraltolerance(Informative)A1.GeneralreviewA1.1Dimension,shapeofpartfeatureorpositionrequirementofallthefeaturesisdecidedbytheirfunction.Therearenofeatureswithoutfunctionrequirements.So,allthefeaturesexpressedonthedrawingofonepartshouldhavetolerancerequirements.A1.2Givegeneraltolerancetothefeatureswhichhavenofunctionspecialrequirements.A1.3Generaltolerancecanbeappliedonthegeometricelementlineardimension,angulardimension,c..A1.4Thegeneraltoleranceoffeatureneednotmarkonthedrawingindividually;thereshouldbeageneralexplanationondrawing,technicaldocumentorstandard.A2ConceptoflineardimensiongeneraltoleranceA2.1Lineardimensiongeneraltolerancereferstothetolerancecanbeguaranteedu 内容来自淘豆网www.taodocs.com转载请标明出处.
更多>> 相关文档
非法内容举报中心
文档信息
  • 页数4
  • 收藏数0 收藏
  • 顶次数0
  • 上传人3012250582
  • 文件大小0 KB
  • 时间2013-02-19
文档标签