JB/T 6340.2-2007 轧辊磨床 第2部分：砂轮架移动式轧辊磨床技术条件
作者:标准资料网 时间:2024-05-12 16:11:36 浏览:8803
来源:标准资料网
基本信息
| 标准名称： | 轧辊磨床 第2部分：砂轮架移动式轧辊磨床技术条件 |
| 英文名称： | Roll grinding machines-Part 2:Grinding wheel moving style roll grinding machines Specifications |
| 中标分类： |
机械 >>
金属切削机床 >>
磨床 |
| ICS分类： |
机械制造 >>
机床 >>
磨床和抛光机
|
| 替代情况： | 替代JB/T 6340-1992 |
| 发布部门： | 国家发展和改革委员会 |
| 发布日期： | 2007-01-25 |
| 实施日期： | 2007-07-01 |
| 首发日期： | |
| 作废日期： | |
| 提出单位： | 中国机械工业联合会 |
| 归口单位： | 全国金属切削机床标委会 |
| 起草单位： | 险峰机床厂 |
| 起草人： | 雷起相、刘庆安 |
| 出版社： | 机械工业出版社 |
| 出版日期： | 2007-06-01 |
| 页数： | 7页 |
| 批文号： | 19909-2007 |
| 书号： | 15111·8295 |
适用范围
JB/T 6340的本部分规定了砂轮架移动式轧辊磨床制造和验收的要求。本部分适用于最大工件直径630mm～3150mm的一般用途的、砂轮架移动式轧辊磨床。
前言
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引用标准
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所属分类： 机械 金属切削机床 磨床 机械制造 机床 磨床和抛光机
【英文标准名称】:StandardPracticeforElectromagnetic(Eddy-Current)ExaminationofNickelandNickelAlloyTubularProducts
【原文标准名称】:镍及镍合金管形制品的电磁(涡电流)检验的标准实施规程
【标准号】:ASTME571-1998(2007)e1
【标准状态】:现行
【国别】:美国
【发布日期】:1998
【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】:E07.07
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:discontinuities;eddy-current;electricalresistivity;electromagnetic;encirclingcoil;magneticsaturation;nickel;nickelalloy;pipe(seeNote1);probe;probecoil;tubes;tubularproducts;weldedtubing;Eddycurrentexamination;Electr
【摘要】:Eddy-currentexaminationisanondestructivemethodoflocatingdiscontinuitiesinmetallicmaterials.Signalscanbeproducedbydiscontinuitiesoriginatingoneithertheexternalorinternalsurfacesofthetubeorbydiscontinuitiestotallycontainedwithinthewall.Sincethedensityofeddycurrentsdecreasesnearlyexponentiallywithincreasingdistancefromthesurfacenearestthecoil,theresponsetodeep-seateddefectsdecreasescorrespondingly.Phasechangesarealsoassociatedwithchangesindepth,allowingtheuseofphaseanalysistechniques.Theresponsefromnaturaldiscontinuitiescanbesignificantlydifferentthanthatfromartificialdiscontinuities,suchasdrilledholesornotches.Forthisreason,sufficientworkshouldbedonetoestablishthesensitivitylevelandsetuprequiredtodetectnaturaldiscontinuitiesofconsequencetotheenduseoftheproduct.Someindicationsobtainedbythismethodmaynotberelevanttoproductquality;forexample,anirrelevantindicationmaybecausedbyminutedentsortoolchattermarks,whicharenotdetrimentaltotheenduseoftheproduct.Irrelevantindicationscanmaskunacceptablediscontinuities.Relevantindicationsarethosewhichresultfromdiscontinuities.Anyindicationthatexceedstherejectionlevelshallbetreatedasarelevantindicationuntilitcanbedemonstratedthatitisirrelevant.Generally,eddy-currentexaminationsystemsarenotsensitivetodiscontinuitiesadjacenttotheendsofthetube(endeffect).Discontinuitiessuchasscratchesorseamsthatarecontinuousanduniformoverthefulllengthofthetubemaynotalwaysbedetectedwithdifferentialencirclingcoilsorprobesscannedalongthetubelength.Formaterialthatismagnetic,astrongmagneticfieldshallbeplacedintheregionoftheexaminingcoil.Amagneticfieldmayalsobeusedtoimprovethesignal-to-noiseratiointubingthatexhibitsslightresidualmagnetism.1.1Thispracticecoverstheproceduresforeddy-currentexaminationofnickelandnickelalloytubes.Theseproceduresareapplicablefortubeswithoutsidediametersupto2in.(50.8mm),incl,andwallthicknessesfrom0.035to0.120in.(0.889to3.04mm),incl.Theseproceduresmaybeusedfortubesbeyondthesizerangerecommended,bycontractualagreementbetweenthepurchaserandtheproducer.1.2Theproceduresdescribedinthispracticemakeuseoffixedencirclingtestcoilsorprobesystems.1.3Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.Note18212;Forconvenience,thetermx201C;tubex201D;orx201C;tubularproductx201D;willhereinafterbeusedtorefertobothpipeandtubing.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H26
【国际标准分类号】:
【页数】:5P.;A4
【正文语种】:英语
Product Code:SAE AS22073
Title:Circuit Breaker, Trip-Free, Push-Pull, Recycling, 1/2 Thru 20 Amp, Type I
Issuing Committee:Ae-8b1 Protective Devices Committee
Scope:Amendment 1 of AS22073.
