【英文标准名称】:StandardTestMethodforMeasuringEdgeTaperandCrownofFlat-RolledElectricalSteelCoils
【原文标准名称】:测量平滚轧电工钢卷材边缘锥度和凸面的标准试验方法
【标准号】:ASTMA971/A971M-2010
【标准状态】:现行
【国别】:
【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】:A06.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:联票;皇冠;边缘锥度;边缘修剪;主线圈;窄带卷
【英文主题词】:coupon;crown;edgetaper;edgetrim;mastercoil;slitcoil
【摘要】:Flat-rolledelectricalsteelmastercoilsareusuallyslitintonarrowercoils.Usuallytheseslitcoilsarepunchedorshearedintolaminationsofvariousshapes.Thelaminationsarethenuniformlystackedtobecomethecoresofmagneticdevicessuchasmotorsandtransformers.Stackingofmanylaminationsexhibitingexcessivetapercausesassemblyproblemsandpoorappearance.Nonuniformstacklengthsinmotorscauseimbalanceandnoise.Whenthelaminationsareinterleavedintransformers,tapercausesairspaceswithinthecoreresultinginincreasednoise,increasedexcitingcurrent,andhighercoreloss.1.1Thistestmethodprovidesaprocedureformeasuringedgetaperandcrownofflat-rolledelectricalsteelcoilsasproducedatthesteelmill.1.2Thevaluesandequationsstatedincustomary(cgs-emuandinch-pound)unitsorSIunitsaretoberegardedseparatelyasstandard.Withinthisstandard,theSIunitsareshowninbrackets.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththisstandard.1.3Thefollowingmaterialspecificationsincluderequirementsforedgetaperorcrown:A677,A683,A726,A840,andA876.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H53
【国际标准分类号】:77_140_50
【页数】:4P.;A4
【正文语种】: