ASME Y14.41-2012 数字化产品定义数据实施规程
作者:标准资料网 时间:2024-04-29 00:14:34 浏览:8705
来源:标准资料网
【英文标准名称】:DigitalProductDefinitionDataPractices
【原文标准名称】:数字化产品定义数据实施规程
【标准号】:ASMEY14.41-2012
【标准状态】:现行
【国别】:美国
【发布日期】:2012
【实施或试行日期】:
【发布单位】:美国机械工程师协会(US-ASME)
【起草单位】:ASME/Y14
【标准类型】:()
【标准水平】:()
【中文主题词】:计算机辅助设计(CAD);计算机辅助设计;数据;数据格式;数据管理;定义;数字的;数字数据;电子的;工程图;信息技术;铸模;产品数据;产品信息;产品文件;技术文件
【英文主题词】:CAD;Computeraideddesign;Data;Dataformats;Datamanagement;Definitions;Digital;Digitaldata;Electronic;Engineeringdrawings;Informationtechnology;Modelling;Productdata;Productinformation;Productsdocumentation;Technicaldocuments
【摘要】:ThisStandardestablishesrequirementsandreferencesdocumentsapplicabletothepreparationandrevisionofdigitalproductdefinitiondata,hereafterreferredtoasdatasets.ThisStandarddefinesexceptionsandadditionalrequirementstoexistingASMEstandardsforusingproductdefinitiondigitaldatasetsordrawinggraphicsheetindigitalformat,hereafterreferredtoasdrawinggraphicsheet.Whennoexceptionoradditionalrequirementsarestated,existingASMEstandardsshallapply.
【中国标准分类号】:J01
【国际标准分类号】:01_110;35_240_50
【页数】:112P;A4
【正文语种】:英语
【英文标准名称】:FreeCuttingCopperRodandBar(Metric)
【原文标准名称】:易切削铜条和棒(米制)
【标准号】:ASTMB301M-1993
【标准状态】:作废
【国别】:美国
【发布日期】:1993
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:铜;米制的;有色金属;棒材
【英文主题词】:copper;bars(materials);metric;non-ferrousmetals
【摘要】:
【中国标准分类号】:H62
【国际标准分类号】:77_120_30
【页数】:
【正文语种】:英语
【英文标准名称】:StandardTestMethodforMeasuringHeatFluxUsingFlush-MountedInsertTemperature-GradientGages
【原文标准名称】:使用嵌装温度梯度表测量热通量的标准试验方法
【标准号】:ASTME2683-2009
【标准状态】:现行
【国别】:
【发布日期】:2009
【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】:E21.08
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:heat-fluxgage;temperaturegradient;thermaltransport
【摘要】:Thepurposeofthistestmethodistomeasurethenetheatfluxtoorfromasurfacelocation.Formeasurementoftheradiantenergycomponenttheemissivityorabsorptivityofthesurfacecoatingofthegageisrequired.Whenmeasuringtheconvectiveenergycomponentthepotentialphysicalandthermaldisruptionsofthesurfacemustbeminimizedandcharacterized.Requisiteistoconsiderhowthepresenceofthegagealtersthesurfaceheatflux.Thedesiredquantityisusuallytheheatfluxatthesurfacelocationwithoutthepresenceofthegage.Temperaturelimitationsaredeterminedbythegagematerialproperties,themethodofmountingthesensingelement,andhowtheleadwiresareattached.Therangeofheatfluxthatcanbemeasuredandthetimeresponsearelimitedbythegagedesignandconstructiondetails.Measurementsofafractionof1kW/m2toabove10MW/m2areeasilyobtainedwithcurrentgages.Withthinfilmsensorsatimeresponseoflessthan10x03BC;sispossible,whilethickersensorsmayhaveresponsetimesontheorderof1s.Itisimportanttochoosethegagestyleandcharacteristicstomatchtherangeandtimeresponseoftherequiredapplication.Whendifferentialthermocouplesensorsareoperatedasspecifiedforone-dimensionalheatfluxandwithinthecorrespondingtimeresponselimitations,thevoltageoutputisdirectlyproportionaltotheheatflux.Thesensitivity,however,maybeafunctionofthegagetemperature.Themeasuredheatfluxisbasedonone-dimensionalanalysiswithauniformheatfluxoverthesurfaceofthegage.Measurementsofconvectiveheatfluxareparticularlysensitivetodisturbancesofthetemperatureofthesurface.Becausetheheat-transfercoefficientisalsoaffectedbyanynon-uniformitiesinthesurfacetemperature,theeffectofasmalltemperaturechangewithlocationisfurtheramplifiedasexplainedbyMoffatetal.(2)andDiller(3).Moreover,thesmallerthegagesurfacearea,thelargeristheeffectontheheattransfercoefficientofanysurfacetemperaturenon-uniformity.Therefore,surfacetemperaturedisruptionscausedbythegageshouldbekeptmuchsmallerthanthesurfacetoenvironmenttemperaturedifferencedrivingtheheatflux.Thisnecessitatesagoodthermalpathbetweenthesensorandthesurfaceintowhichitismounted.Ifthegageisnotwatercooled,agoodthermalpathwaytothesystemx2019;sheatsinkisimportant.Thegageshouldhaveaneffectivethermalconductivityasgreatorgreaterthanthesurroundingmaterial.Itshouldalsohavegoodphysicalcontactinsuredbyatightfitintheholeandamethodtotightenthegageintothesurface.AnexamplemethodusedtotightenthegagetothesurfacematerialisillustratedinFig.2.Thegagehousinghasaflangeandaseparatetighteningnuttappedintothesurfacematerial.Ifthegageiswatercooled,thethermalpathwaytotheplateislessimportant.Theheattransfertothegageentersthewaterastheheatsinkinsteadofthesurroundingplate.Consequently,thethermalresistancebetweenthegageandplatemayevenbeincreasedtodiscourageheattransferfromtheplatetothecoolingwater.Unfortunately,thismayalsoincreasethethermalmismatchbetweenthegageandsurroundingsurface.Fig.2showsaheatfluxgagemountedintoaplatewiththesurfacetemperatureofthegageofTsandthesurfacetemperatureofthesurroundingplateofTp.Aspreviouslydiscussed,adifferenceintemperaturebetweenthegageandplatemayalsoincreasethelocalheattransfercoefficientoverthegage.Thisamplifiesthemeasurementerror.Consequently,awelldesignedheatfluxgagewillkeepthetemperaturedifference........
【中国标准分类号】:
【国际标准分类号】:17_200_10
【页数】:7P.;A4
【正文语种】:
