【英文标准名称】:StandardTestMethodforDurabilityWearTestingofSeparableElectricalConnectorSystemsUsingElectricalResistanceMeasurements
【原文标准名称】:使用电阻测量的可拆式电气连接器系统耐磨损测试用标准试验方法
【标准号】:ASTMB794-1997(2009)
【标准状态】:现行
【国别】:
【发布日期】:1997
【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】:B02.11
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:接触电阻;电气触点;温度和湿度循环试验;磨损;磨损痕迹;加速老化测试-电气加热/接触材料;退化-电触点材料;耐久性-建筑材料/设施;电阻/电阻系数-电触点材料;性能-电气/电子系统/设施;温度试验-电触点材料;压实阻力;循环温度-湿度试验;电气连接器;电触点材料;电性能;湿度;插入/拔出循环;机械性能;温度-湿度循环试验;振动试验;磨损测试
【英文主题词】:contactresistance;electricalconnectors;electricalcontacts;temperatureandhumiditycyclingtest;wear;weartracks;Acceleratedaging/testing--electricalheating/contactmaterials;Degradation--electricalcontactmaterials;Durability--buildingmate
【摘要】:Materialsforelectricalconnectorcontactsmustsatisfyanumberofrequirementsintheareasofelectrical,mechanical,andeconomiccharacteristics.Thestabilityofelectricalpropertiesisoneofthemostimportantofthesecharacteristics.Wearofcontactsurfacesmayadverselyaffecttheseelectricalproperties,especiallyindesignswherethecontactsurfacesarerelativelythincoatings.Thistestmethodprovidesameanstocomparevariousmaterialsystemsonabasisrelevanttotheirapplicationinelectricalconnectorcontacts.Repeatedinsertionandwithdrawalofaconnectormaycausewearorothermechanicaldamagetotheelectricalcontactsurfaces,renderingthosesurfacesmoresusceptibletoenvironmentaldegradation.Thistestmethodisintendedtodetectdegradationoftheelectricalpropertiesoftheconnectorbysuchprocesses.Thistestmethoddescribesproceduresforconductingwearanddurabilitytestingofelectricalconnectors;theproceduresproducequantitativeresults.Theseresultsmaybeusedtocomparetheperformanceofdifferentconnectordesignssothatmeaningfuldesignchoicescanbemade.Suchresultsmayalsobeusedtocomparetheperformanceofaconnectortoapreviouslyestablishedstandardtoevaluatethequalityofthesamplesundertest.Thetestresultsobtainedfromthistestmethodarelimitedintheirapplicabilitytoconnectorcombinationsthatareequivalentindesignandmanufacturetothoseactuallytested.Theuseriscautionedthattheconditionsinthistestshouldbecomparedtotheconditionsthattheconnectorwillexperienceintheintendedapplicationinordertodeterminetherelevanceofthistestmethodtotheparticularneedsoftheuser.Forexample,theenvironmentalstressinthistestmethodislessseverethancertainindustrialandmarineenvironmentsandthereforetestresultsarenotdirectlyapplicabletopredicttheperformanceofproductintendedforuseinsuchareas.Itisrecommendedthatthistestmethodbeusedinoneoftwoways.First,itmaybeusedtoevaluateandreporttheperformanceofaparticularconnectorsystem.Insuchacase,itisappropriatetoreporttheresultsinatableintheformatshowninFig.1andtostatex201C;Theresultsshowninthetablewereobtainedfor(insertconnectordesignationordescription)whentestedinaccordancewithASTMStandardB794,Method__,Procedure__.x201D;Second,itmaybeusedtoimposerequirementsforacceptanceofproduct.Inthiscase,limitsforthevaluesshowninFig.1mustbeestablishedpriortoproductacceptancetesting.Suchlimitsmaybeestablishedbyvariousmethodssuchasbyevaluationofproductwhichisknowntobeacceptableorbyapplicationofappropriateexperience.Theselimitsmustbedocumentedinamannerthattheentityperformingtheproducttestcanrefertothelimitstodetermineifthetestproductconformstosuchlimits.Apurchasermaywishtosupplyatableoflimitsandincludeonthepurchaseorderastatementsimilarto:x201C;Theproduct,whentestedinaccordancewithASTMStandardB794,Method__,Procedure__,shallmeetthelimitsinthesuppliedtable.x201D;ThistablesuppliedbythepurchasermaysetlimitsonallofthevaluesinFig.1,oronlyonasubsetofthosevaluesthatthepurchaserdeemsadequatetoensuretheperformanceoftheproduct.FIG.1SampleFormatforReportingResults1.1Thistestmethodcoverstheeffectsofrepeatedinsertionandwithdrawalofseparableelectr......
【中国标准分类号】:L23
【国际标准分类号】:29_120_30
【页数】:6P.;A4
【正文语种】:
基本信息
标准名称: | 攻丝前钻孔用麻花钻直径 |
英文名称: | Drill diameter for use prior to tapping screw threads |
中标分类: |
机械 >>
工艺装备 >>
刀具 |
ICS分类: |
机械制造 >>
切削工具 >>
钻头、锪钻、铰刀
|
发布部门: | 中华人民共和国国家质量监督检验检疫总局 中国国家标准化管理委员会 |
发布日期: | 2006-07-20 |
实施日期: | 2007-01-01 |
首发日期: | 2006-07-20 |
作废日期: | 1900-01-01 |
主管部门: | 中国机械工业联合会 |
提出单位: | 中国机械工业联合会 |
归口单位: | 全国刀具标准化技术委员会 |
起草单位: | 成都工具研究所 |
起草人: | 聂珂星 |
出版社: | 中国标准出版社 |
出版日期: | 2007-01-01 |
页数: | 平装16开 页数:14, 字数:23千字 |
计划单号: | 20032520-T-604 |
适用范围
本标准规定了用于正常旋合长度的丝锥攻丝前钻孔用麻花钻的直径。 本标准适用于攻丝前钻孔用麻花钻。
前言
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引用标准
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所属分类: 机械 工艺装备 刀具 机械制造 切削工具 钻头 锪钻 铰刀