DIN 9777-2-1994 邮件和数据处理文件的连续加工系统.第2部分:拆信机.简要资料
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来源:标准资料网
【英文标准名称】:Systemsofcontainedprocessingofmailanddataprocessingdocuments;letteropeningmachines;minimuminformationtobespecified
【原文标准名称】:邮件和数据处理文件的连续加工系统.第2部分:拆信机.简要资料
【标准号】:DIN9777-2-1994
【标准状态】:作废
【国别】:德国
【发布日期】:1994-05
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:数据系统工程;邮件处理机器;最低信息;办公机器;切削工具;拆信机;办公装置;办公室设备;信函;切割装置
【英文主题词】:Cuttingdevices;Cuttingtools;Datasystemsengineering;Letteropeningmachines;Letters(documents);Mailprocessingmachines;Minimuminformation;Officeequipment;Officemachines;Officesystem
【摘要】:
【中国标准分类号】:Y54
【国际标准分类号】:35_260
【页数】:4P;A4
【正文语种】:德语
【英文标准名称】:StandardTestMethodforDeterminationoftheBreakawayFrictionCharacteristicsofRollingElementBearings
【原文标准名称】:测定滚动体轴承破裂摩擦特性的标准试验方法
【标准号】:ASTMG182-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【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】:G02.50
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:轴承;测定;元件;摩擦;滚动轴承;滚动体;试验
【英文主题词】:coefficientofrollingfriction;frictiontesting;rolling;rollingfriction
【摘要】:Thistestisasimple,effectivewayofdeterminingtheabilityofbearingstorollfreely.Mostbearingmanufacturersdonotsupplyinformationonthebreakawayfrictioncoefficientoftheirproductsandifthisisadesignfactor,usersoftenbuycandidatebearingsandtrythemuntiltheyfindonethatappearstooperatefreerthantheothers.Thistestallowsquantificationofthebreakawayfrictioncharacteristicsofbearings.Thistestassessesthefrictionofabearingasatribosystemwhichincludesitsconstructionandlubrication.Ithasshowntocorrelatewithuse.Ifabearinghasalowbreakawayangleinthistest,itsbreakawayfrictionwillbelowerinservicethanthesamesizebearingsthatdisplayedahigherbreakawayangleinthistest.Breakawayfrictionofbearingsisimportantininstrumentswhereforcesarelightandthebearingsareusedaspivotsratherthanforcontinuedrotation.Lowfrictionisoftenimperativeforproperdeviceoperation.Bearingswithlowbreakawayfrictionareoftensoughtforwebhandlingrollers.Manyrollersaredrivenonlybytangentialwebcontactandslippagecanoftendamagetheweb.Lowfrictionbearingsarerequired.Thistestisusefulforscreeningbearingsforanyapplicationswherebreakawayfrictionisadesignconcern.1.1ThistestmethodisanextensionofTestMethodG164andusesaninclinedplaneandapaperclipridertodetectthepresenceorabsenceoflubricantsonthesurfacesofflexiblewebs.Astudytoidentifyfreespinningorlowrollingfrictionbearingsindicatedthatthepaperclipfrictiontestcouldbeusedforrollingfrictionbysimplyreplacingthepaperclipwitharollingelementbearingonanaxle.Theangleoftheinclinedplaneatinitiationofrollingisthebreakawayangle.Thistestmethodcanbeusedtomeasuretheangleatbreakawayofsmalldiameter(upto100mmoutsidediameter)rollingelementbearings.Thebearingsthathavebeentestedinthedevelopmentofthismethodareconventionalballbearingswithdifferentseparators,seals,anddifferentconditionsoflubrication(none,oil,greases,andsoforth),butthereisnotechnicalreasonwhythistestmethodwouldnotworkwithbearingsofotherdesign,includingplainbearings.Rollingelementbearingslikeanyslidingsystemcanhavefrictioncharacteristicsatbreakawaythataredifferentthanrollingcontinuously.Asisthecasewithmostinclinedplanefrictiontests,thetestonlyproducesthefrictioncharacteristicattheonsetofmeasurablerolling,usingtheangle()whenmeasurablerollingcommences.Theobjectiveofthistestisanassessmentofbreakawayrollingfrictioncharacteristicstoassistmachinedesignersintheselectionofrollingelementbearingsforinstrumentpivotsandthelikewherebreakawayfrictionisaconcern.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:J11
【国际标准分类号】:21_100_20
【页数】:5P.;A4
【正文语种】:
【英文标准名称】:Modularorderforthedevelopmentofmechanicalstructuresforelectronicequipmentpractices-Part2-4:Sectionalspecification-Interfaceco-ordinationdimensionsforthe25mmequipmentpractice-Adaptationdimensionsforsubracksorchassisapplicab
【原文标准名称】:电子设备用机械结构设计模块化规则.第2-4部分:分规范.25mm设备接口协调尺寸.与IEC60297-3-100标准一致的机架或货架可用的支架或底架用适配尺寸(19英寸)
【标准号】:IEC60917-2-4-2010
【标准状态】:现行
【国别】:国际
【发布日期】:2010-03
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/SC48D
【标准类型】:()
【标准水平】:()
【中文主题词】:组装件;底盘;冷却;柜橱;设计;尺寸;电气工程;电子设备;电子仪器;外壳;架设(施工作业);接口系统;安装;印制电路板;货架;结构体系;辅助框架;19英寸系列
【英文主题词】:Assemblies;Chassis;Cooling;Cupboards;Design;Dimensions;Electricalengineering;Electronicequipment;Electronicinstruments;Enclosures;Erecting(constructionoperation);Interfacesystems;Mounting;Printed-circuitboards;Racks;Structuralsystems;Subracks;19inchseries
【摘要】:ThispartofIEC60917specifiesdimensionsformountingflangesofmetricsubracksorchassisthataretobemountedinto19incabinetsorracks.AdditionaldimensionsforsubracksorchassisareaccordingtotheIEC60917series,andfor19incabinetsorrackstotheIEC60297series.EMC,seismicclimaticandenvironmentalrequirementsandtests,aredefinedintheIEC61587series.Thedrawingsusedinthisstandardarenotintendedtoindicateproductdesign,onlythespecificdimensionsthatshallbeused.TheterminologyusedcomplieswithIEC60917-1
【中国标准分类号】:L94
【国际标准分类号】:31_240
【页数】:34P.;A4
【正文语种】:英语
