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【英文标准名称】:ISOgeneralpurposemetricscrewthreads-Part50:Combinationoftoleranceclassesforformedinternalscrewthreads
【原文标准名称】:ISO一般用途米制螺纹.第50部分:成型内螺纹用公差等级
【标准号】:DIN13-50-1999
【标准状态】:现行
【国别】:德国
【发布日期】:1999-11
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:螺母;公差(测量);使用;标准螺纹;紧固件;名称与符号;米制的;ISO米制螺纹;内螺纹;螺纹形状;直径;基本牙型;极限尺寸;紧配合螺纹;公差级;形状公差;ISO微型螺纹;标准公差;标准量器;尺寸偏差;尺寸;ISO螺纹;米制螺纹;螺纹;厘米克秒制;尺寸公差;螺纹牙型
【英文主题词】:Applications;Basicprofiles;CGSsystem;Close-fitthreads;Corediameter;Designations;Diameter;Dimensionaldeviations;Dimensionaltolerances;Dimensions;Fasteners;Filletings;Formtolerances;Internalthreads;ISOmetricthreads;ISOminiaturescrewthreads;ISOscrewthreads;Limitdimensions;Metric;Metricscrewthreads;Normalthreads;Nuts;Pitchdiameter;Screwthreadprofiles;Standardmeasures;Standardtolerances;Threadforms;Threads;Toleranceclasses;Tolerances(measurement)
【摘要】:Thedocumentspecifiestolerancesonformedinternalscrewsthreads.
【中国标准分类号】:J04
【国际标准分类号】:21_040_10
【页数】:4P.;A4
【正文语种】:德语


【英文标准名称】:StandardPracticeforProcessCompensatedResonanceTestingViaSweptSineInputforMetallicandNon-MetallicParts
【原文标准名称】:使用正弦扫频输入法对金属和非金属部件进行工艺补偿共振试验的标准实施规程
【标准号】:ASTME2534-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:E07.06
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:damageidentification;elasticproperties;featureextraction;nondestructiveexamination;nondestructiveinspection;processcompensatedresonantexamination;processcompensatedresonanttesting;productionvariation;qualitycontrol;resonanceinspecti
【摘要】:PCRTApplicationsandCapabilities8212;PCRThasbeenappliedsuccessfullytoawiderangeofNDTapplicationsinthemanufactureandmaintenanceofmetallicandnon-metallicparts.Examplesofanomaliesdetectedarediscussedin1.1.PCRThasbeenshowntoprovidecosteffectiveandaccurateNDTsolutionsinmanyindustriesincludingautomotive,aerospace,andpowergeneration.Examplesofsuccessfulapplicationscurrentlyemployedincommercialuseinclude,butarenotlimitedto:(1)Siliconnitridebearingelements(2)Investmentcaststeelrockerarms(3)Castgasturbineblades(4)Stampedandbrazedsteelrockerarms(5)Castaluminumknucklesandcontrolarms(6)Castductileironcontrolarms(7)Castcylinderheadsandcylinderblocks(8)Sinteredpowdermetalgearsandclutchplates(9)Machinedforgedsteelsteeringracks(10)Machinedforgedsteeltransmissiongearsandshafts(11)Ceramicoxygensensors(12)Siliconwafers(13)GasturbinecomponentsGeneralApproachandEquipmentRequirementsforPCRTviaSweptSineInput:PCRTsystemsarecomprisedofhardwareandsoftwarecapableofinducingvibrations,recordingpartresponsetotheinducedvibrations,andexecutinganalysisofthedatacollected.Inputtingasweptsinewaveintotheparthasproventobeaneffectivemeansofintroducingmechanicalvibration,andcanbeachievedwithahighqualitysignalgeneratorcoupledwithanappropriateactivetransducerinphysicalcontactwiththepart.Collectionofthepartx2019;sfrequencyresponsecanbeachievedbyrecordingthesignalgeneratedbyanappropriatepassivevibrationtransducer.Thesoftwarerequiredtoanalyzetheavailabledatamayincludeavarietyofsuitablestatisticalanalysisandpatternrecognitiontools.MeasurementaccuracyandrepeatabilityareextremelyimportanttotheapplicationofPCRT.HardwareRequirements8212;Asweptsinewavesignalgeneratorandresponsemeasurementsystemoperatingoverthedesiredfrequencyrangeofthetestpartarerequiredwithaccuracybetterthan0.002%.Thesignalgeneratorshouldbecalibratedtoapplicableindustrystandards.Transducersmustbeoperableoversamefrequencyrange.Threetransducersaretypicallyused;oneDrivetransducerandtwoReceivetransducers.Transducerstypicallyoperateinadryenvironment,providingdirectcontactcouplingtothepartunderexamination.However,noncontactingresponsemethodscanoperatesuitablywhenpartsarewetoroil-coated.Otherthanfixturingandtransducercontact,noothercontactwiththepartisallowedasthesemechanicalforcesdampencertainvibrations.Foroptimalexamination,partsshouldbeplacedpreciselyonthetransducers(generally,x00B1;0.062in.(1.6mm)ineachaxisprovidesacceptableresults).TheexaminationnestandcablingshallisolatetheDrivefromReceivesignalsandgroundreturns,soastonotproduce(mechanicalorelectrical)crosstalkbetweenchannels.Excessiveexternalvibrationoraudiblenoise,orboth,willcompromisethemeasurements.ConstraintsandLimitations:PCRTcannot..........
【中国标准分类号】:Z32
【国际标准分类号】:17_160
【页数】:8P.;A4
【正文语种】:英语