ZB Y 090-1982 DDZ-III型电动单组合仪表 IA电源箱
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基本信息
| 标准名称： | DDZ-III型电动单组合仪表 IA电源箱 |
| 替代情况： | 被GB/T 14069-93代替 |
| 发布日期： | |
| 实施日期： | 1991-01-01 |
| 首发日期： | |
| 作废日期： | |
| 出版日期： |
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前言
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目录
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引用标准
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所属分类： 轻工 文化与生活用品 轻工 文化与生活用品综合 卫生 安全 劳动保护
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Product Code:SAE AS9530
Title:Bolt, Machine - Hexagon Head, Drilled 1 Hole, Cadmium Plated, Steel UNS G87400, 125 ksi min, .2500-28 UNJF-3A
Issuing Committee:E-25 General Standards For Aerospace And Propulsion Systems
Scope:Scope unavailable.【英文标准名称】:StandardTestMethodforStaticandKineticCoefficientsofFrictionofPlasticFilmandSheeting
【原文标准名称】:测定塑料薄膜和薄板静摩擦和动摩擦系数的标准试验方法
【标准号】:ASTMD1894-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D20.19
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:friction;kineticcoefficientoffriction;plasticfilm;plasticsheeting;slip;staticcoefficientoffriction;Coefficientoffriction(COF)--plastics;Kineticfrictionanalysis;Plasticsheetandfilm;Staticcoefficientoffriction;Statictests--plas
【摘要】:Measurementsoffrictionalpropertiesmaybemadeonafilmorsheetingspecimenwhenslidingoveritselforoveranothersubstance.Thecoefficientsoffrictionarerelatedtotheslippropertiesofplasticfilmsthatareofwideinterestinpackagingapplications.Thesemethodsyieldempiricaldataforcontrolpurposesinfilmproduction.Correlationoftestresultswithactualperformancecanusuallybeestablished.Thistestmethodincludestestingattemperaturesotherthan23x00B0;Cbyheatingonlytheplanewhilethesledisatambienttemperature.Slippropertiesaregeneratedbyadditivesinsomeplasticfilms,forexample,polyethylene.Theseadditiveshavevaryingdegreesofcompatibilitywiththefilmmatrix.Someofthembloom,orexudetothesurface,lubricatingitandmakingitmoreslippery.Becausethisbloomingactionmaynotalwaysbeuniformonallareasofthefilmsurface,valuesfromthesetestsmaybelimitedinreproducibility.Thefrictionalpropertiesofplasticfilmandsheetingmaybedependentontheuniformityoftherateofmotionbetweenthetwosurfaces.Careshouldbeexercisedtoensurethattherateofmotionoftheequipmentisascarefullycontrolledaspossible.Dataobtainedbytheseproceduresmaybeextremelysensitivetotheageofthefilmorsheetandtheconditionofthesurfaces.Thebloomingactionofmanyslipadditivesistime-dependent.Forthisreason,itissometimesmeaninglesstocompareslipandfrictionpropertiesoffilmsorsheetsproducedatdifferenttimes,unlessitisdesiredtostudythiseffect.Frictionalandslippropertiesofplasticfilmandsheetingarebasedonmeasurementsofsurfacephenomena.Whereproductshavebeenmadebydifferentprocesses,orevenondifferentmachinesbythesameprocess,theirsurfacesmaybedependentontheequipmentoritsrunningconditions.Suchfactorsmustbeweighedinevaluatingdatafromthesemethods.Themeasurementofthestaticcoefficientoffrictionishighlydependentontherateofloadingandontheamountofblockingoccurringbetweentheloadedsledandtheplatformduetovariationintimebeforemotionisinitiated.Careshouldbeexercisedtomakecertainthatthespeedofresponseoftherecorder,eitherelectronicormechanical,isnotexceeded.Formanymaterials,theremaybeaspecificationthatrequirestheuseofthistestmethod,butwithsomeproceduralmodificationsthattakeprecedencewhenadheringtothespecification.Therefore,itisadvisabletorefertothatmaterialspecificationbeforeusingthistestmethod.Table1ofClassificationSystemD4000liststheASTMmaterialsstandardsthatcurrentlyexist.1.1Thistestmethodcoversdeterminationofthecoefficientsofstartingandslidingfrictionofplasticfilmandsheetingwhenslidingoveritselforothersubstancesatspecifiedtestconditions.Theprocedurepermitstheuseofastationarysledwithamovingplane,oramovingsledwithastationaryplane.Bothproceduresyieldthesamecoefficientsoffrictionvaluesforagivensample.Note18212;Forthefrictionalcharacteristicsofplasticfilmspartiallywrappedaroundacylinder,orcapstan,seeTestMethodG143underthejurisdictionofASTMSubcommitteeG02.50.1.2Testdataobtainedbythistestmethodisrelevantandappropriateforuseinengineeringdesign.1.2.1Asanoptiontothistest,coefficientoffrictionmayberunattemperaturesotherthan23x00B0;Cbyheatingonlytheplanewhilethesledisatambienttemperature.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesareforinformationonly.
Title:Bolt, Machine - Hexagon Head, Drilled 1 Hole, Cadmium Plated, Steel UNS G87400, 125 ksi min, .2500-28 UNJF-3A
Issuing Committee:E-25 General Standards For Aerospace And Propulsion Systems
Scope:Scope unavailable.【英文标准名称】:StandardTestMethodforStaticandKineticCoefficientsofFrictionofPlasticFilmandSheeting
【原文标准名称】:测定塑料薄膜和薄板静摩擦和动摩擦系数的标准试验方法
【标准号】:ASTMD1894-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D20.19
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:friction;kineticcoefficientoffriction;plasticfilm;plasticsheeting;slip;staticcoefficientoffriction;Coefficientoffriction(COF)--plastics;Kineticfrictionanalysis;Plasticsheetandfilm;Staticcoefficientoffriction;Statictests--plas
【摘要】:Measurementsoffrictionalpropertiesmaybemadeonafilmorsheetingspecimenwhenslidingoveritselforoveranothersubstance.Thecoefficientsoffrictionarerelatedtotheslippropertiesofplasticfilmsthatareofwideinterestinpackagingapplications.Thesemethodsyieldempiricaldataforcontrolpurposesinfilmproduction.Correlationoftestresultswithactualperformancecanusuallybeestablished.Thistestmethodincludestestingattemperaturesotherthan23x00B0;Cbyheatingonlytheplanewhilethesledisatambienttemperature.Slippropertiesaregeneratedbyadditivesinsomeplasticfilms,forexample,polyethylene.Theseadditiveshavevaryingdegreesofcompatibilitywiththefilmmatrix.Someofthembloom,orexudetothesurface,lubricatingitandmakingitmoreslippery.Becausethisbloomingactionmaynotalwaysbeuniformonallareasofthefilmsurface,valuesfromthesetestsmaybelimitedinreproducibility.Thefrictionalpropertiesofplasticfilmandsheetingmaybedependentontheuniformityoftherateofmotionbetweenthetwosurfaces.Careshouldbeexercisedtoensurethattherateofmotionoftheequipmentisascarefullycontrolledaspossible.Dataobtainedbytheseproceduresmaybeextremelysensitivetotheageofthefilmorsheetandtheconditionofthesurfaces.Thebloomingactionofmanyslipadditivesistime-dependent.Forthisreason,itissometimesmeaninglesstocompareslipandfrictionpropertiesoffilmsorsheetsproducedatdifferenttimes,unlessitisdesiredtostudythiseffect.Frictionalandslippropertiesofplasticfilmandsheetingarebasedonmeasurementsofsurfacephenomena.Whereproductshavebeenmadebydifferentprocesses,orevenondifferentmachinesbythesameprocess,theirsurfacesmaybedependentontheequipmentoritsrunningconditions.Suchfactorsmustbeweighedinevaluatingdatafromthesemethods.Themeasurementofthestaticcoefficientoffrictionishighlydependentontherateofloadingandontheamountofblockingoccurringbetweentheloadedsledandtheplatformduetovariationintimebeforemotionisinitiated.Careshouldbeexercisedtomakecertainthatthespeedofresponseoftherecorder,eitherelectronicormechanical,isnotexceeded.Formanymaterials,theremaybeaspecificationthatrequirestheuseofthistestmethod,butwithsomeproceduralmodificationsthattakeprecedencewhenadheringtothespecification.Therefore,itisadvisabletorefertothatmaterialspecificationbeforeusingthistestmethod.Table1ofClassificationSystemD4000liststheASTMmaterialsstandardsthatcurrentlyexist.1.1Thistestmethodcoversdeterminationofthecoefficientsofstartingandslidingfrictionofplasticfilmandsheetingwhenslidingoveritselforothersubstancesatspecifiedtestconditions.Theprocedurepermitstheuseofastationarysledwithamovingplane,oramovingsledwithastationaryplane.Bothproceduresyieldthesamecoefficientsoffrictionvaluesforagivensample.Note18212;Forthefrictionalcharacteristicsofplasticfilmspartiallywrappedaroundacylinder,orcapstan,seeTestMethodG143underthejurisdictionofASTMSubcommitteeG02.50.1.2Testdataobtainedbythistestmethodisrelevantandappropriateforuseinengineeringdesign.1.2.1Asanoptiontothistest,coefficientoffrictionmayberunattemperaturesotherthan23x00B0;Cbyheatingonlytheplanewhilethesledisatambienttemperature.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesareforinformationonly.
