防窜焊接滚轮架轴向窜动实验研究中英文翻译、外文文献翻译、外文翻译

XXXX文献翻译二级学院XXXXXXX班级XXXXX学生姓名XX学号XXXXXXXXX防窜焊接滚轮架轴向窜动实验研究摘要：简述焊接滚轮架轴向窜动的基本理论,并同时在焊接滚轮架的实验模型上进行了试验研究。结果表明,焊接滚轮架轴向窜动的主要原因在于工件的翻转存在着螺旋夹角，本文主要分析了螺旋角和工件的圆周速率对窜动的影响。关键词:焊接滚轮架轴向运动螺旋角筒体线速度1.简介在大厚壁、大型化、高容量、耐磨蚀的锅炉、石油、化工压力容器的焊接生产中，由于焊接滚轮架的制造安装误差以及筒体几何形状的不规则（偏离理想回转体）等原因，筒体在滚轮架上转动时，会不可避免的沿其轴向发生窜动，从而影响环缝的焊接质量。若不进行防窜处理，出现的窜动量大便无法进行焊接。本课题研究提供了当圆形工件焊接时，轴向窜动的机制.设计反窜动焊接滚轮架.尤其是应用于滚轮架之上。2.实验2.1.实验描述在图1中试验表明,初步的试验研究了两个因素:螺旋角和工件的线速度-影响轴向窜动的主要因素。在实验过程，轴向位移Sa和轴向窜动速度Va测量方法如图1。而进行的方法是将轴向位移传感器安装到的圆筒的一端，与传感器相连的X-Y记录器记录工件的轴向位移,每5s记录一次,平均窜动速度Va在每个角度可以计算出数据。在试验阶段，实验模型是如下:一、调节四滚轮高度在同一个水平线上，并在矩形的四个顶点，那么滚轮与旋转工件相对平衡，工件在一段很长的时间不窜动，或定期窜动一个很小的范围。2.2实验结果的讨论2.2.1螺旋角的影响(1)例如图2所示。Va的变化检测条件是:vc=35m/hL=422mm,α=60"Va是与tanβ4成正比的，β4是与(1~~~6c)相关的，坡度线为3.06毫米/秒,Va不再正比tanβ4时,当β4大于6c,轴向窜动是随着β4逐渐减小。由于只有一个驱动滚轮(rollerNo.4)的影响,β4可以改变的,而其他的仍然是零,工件作出了协调的运动。当β4的比例较小,Va也小。圆柱体轴向摩擦力,滚轮最大轴向摩擦力,汽缸产生弹性滑针对滚轮，轴向运动之间各滚轮和工件协调弹性滑动。因此Va是:理论曲线的斜率k可以按下列公式计算:k=3.06mm/s的实验曲线。因此,在考虑到各方面的实验,两个斜坡上可被认为是大致相等。当β4比较大,滚轮与工件之间最大轴向摩擦力大于最大摩擦力,工件产生的摩擦滑动抵抗滚轮存在的滑动摩擦力，由于窜动的存在,Va不再随着tanβ4的增加而增加,而是逐渐减小。(2)以下三个实验,工件的不协调轴向窜动随之改变。由同一螺旋角度来衡量的一个主动滚轮及两个，三个主动滚轮。三曲线之间的Sa和Va研究结果显示如上图，随着滚轮数量的增加,Va逐渐增大。Va3>Va2>Va1当驱动滚轮的数量变化时,度气缸的非兼容轴向运动将会有所改变.随着同一螺旋角影响下滚轮数量的增加。兼容的分量越来越大,但互不兼容的分量越来越小。换句话说,工件的轴运动将转化为是否兼容的问题。因此,最大轴向窜动Va由β角所决定，四轮有相同的螺旋角时Va为:2.2.2筒体线速度的影响螺旋角从平衡位置+2’对4号驱动滚轮的影响。工件将影响轴向窜动（例如下图）所显示va-VC的曲线,后者表明Va是与Vc成正比的,曲线的斜率大约是0.00708。因为β4=+2实在太小,工件相对每一滚轮没有形成轴向窜动。因此,轴滚轮和工件之间的相对运动是完全协调的弹性滑动，Va为：Va正比于Vc。理论曲线的斜率k可以按下列方程K"=0.25tan4=0.25tan2'=0.00873wherek=0.00708mm/s.因此,在考虑到各方面的实验,协调的两个斜坡上可被认为是大致相等.3.结论（1）因为制造及装配的偏差，工件的中心线与滚轮轴线不平行，没有在同一平面,因此形成螺旋角β，存在β是发生轴向窜动的主要原因。工件轴线方向重力的分量影响,也是轴向窜动的一个原因。（2）合理调整轴运动,使不兼容的分量尽可能小和兼容分量尽可能大从而减小轴向窜动。（3）随着滚轮数量的增加相同β角下的轴向窜动将增大,但不兼容的部分减少。随着兼容部分的增加工件的轴向窜动速度将增加，当轴向滑动摩擦发生在滚轮和工件之间时，轴向窜动将被弹性摩擦和滑动摩擦所协调，但Vc并不与β成正比，关系如下：参考文献：(1)ZWang.焊接机械设备教材，甘肃兰州工业大学，张培源(1992)pp85-98(2)武汉材料技术研究所，南京化工研究所,与华南工学院，水泥生产机械设备,建筑工业出版社，中国北京,(1981)pp,184-187(3)J.Halling(ed.)，麦克米伦出版社,(1975)pp.174-200ExperimentandstudyintotheaxialdriftingofthecylinderofaweldingrollerbeAbstract：Thebasictheoryoftheaxialdriftingofthecylinderofaweldingrollerbedisintroducedinthepaper,andatthesametimeexperimentandstudyonthemechanismoftheaxialdriftingofthecylinderhavebeendoneonanexperimentalmodeloftheweldingrollerbed.Itisshownthatthemaincauseoftheaxialdriftingofthecylinderliesintheexistenceofaspiralanglebetweenthecylinderandthecylinderandtheroller.ThisarticlemainlyanalyzesthespiralAngleandcircumferentialvelocity'sinfluenceonthechannelingmotionartifacts.Keywords:weldingrollerbedaxialmotionspiralangleCylinderlinearvelocity1IntroductionTheWeldingandProductioninthebigThick-Cliff、TheLarge-Scale、High-Content、Endure-AblationofthepressurevesseloftheBoiler、Oil、chemical,becauseofreasonoftheerrorofthemanufacture-installationandtheabnormityofgeometry-formofthecylinder(departureidealgyrationobject),thecylinderwheelontherollerbed,inevitablyitwilloccuraxialdrifting,sothataffecttheweldingquality.Ifnottaketheanti-floatingmeasure,theweldingcannotgoingbecauseofthelargedrifting.Thistopicresearchwhenthecircularworkpiecewelding,axialdriftingmechanisms.Designthedynamicweldingrollerframe.Especiallyappliedtotherollerframe.2.Experiment2.1DescriphmofexpermentTheexperimentalmodelisshowninFig1.Experimentsweredonetostudytwofactors:thespiralangleandthecylinder’scircularlinearvelocity,whichaffecttheaxialdriftingofthecylinder.Intheexperimentingprocess.theaxialdisplacementSaandtheaxialdriftingvelocityVaofthecylinderweremeasuredbythevariationofthetwofactorsdescribedabove.ThemeasuringmethodisshowninFig.1,andiscarriedoutbymeansofbringinganaxialdisplacementsensorintocontactwithoneendofthecylinder.withthesensorbeingconnectedtoanX-Yrecordertorecordthecylinder’saxialdisplacementevery5s.LinearlyregressingtheplotSa--t(texpressestime),theaveragedriftingvelocityVa,ateverydeflectinganglecanbecalculated.Beforeexperimenting.theexperimentalmodelisinitialisedasfollows:first.theheightofthefourrollersisadustedbymeansofaleveltoputthecentersofthefourrollersinthesamehorizontalplane,andatthefourvertexesoftherectangle.thentherollersaredeflectedsothattherotatingcylinderisattherelativeequilibriumposition.Thenthecylinderdoesnotdriftoveralongtime.orperiodicallydriftoveraverysmallaxialrange2.2experimentresultsanddiscussion2.2.1Effectofspiralangle(I)Fig.6showsthatchangeofVawiththevariationofThetestingconditionis:positiverotalion,Vc=35m/hL=422mm,α=60”TheVa-tanβ4curveshowsthatVaisdirectlyproportionaltotanβ4whenβ4isrelativelysmall(1~~~6c).Theslopeofthelinebeing3.06mm/s,Vaisnolongerdirecllyproportionaltotanβ4whenβ4,isgreaterthan6CThecurveisanarchedcurve.i.e.withtheincrementofβ4,.Va,increases.butwiththeincrementofVagraduallybecomingsmalletBecauseonlyonedrivenroller(rollerNo.4)isdeflected,i.eβ4canbechangedwhilsttheothersremainzero,thecylindermakesanon-compatiblemotion.Whenβ4isrelativelysmall,Vaissmallalso.Theaxialfrictionalforcesbetweenthecylinderandrollersarelessthanthemaximumaxialfrictionalforce,andthecylinderproducesanelasticslidingagainstrollers.Axialmotionbetweeneachrollerandthecylinderiscoordinatedbyelasticsliding.thusVais:inthetheoreticalcurve,theslopeK’canbecalculatedbythefollowingequation:K=3.06mm/sintheexperimentalcurve.Thus,intakingaccountoftheexperimentaltolerance,thetwoslopescanbeconsideredtobeapproximatelyequal.Whenβ4isrelativelylarge,theaxialfrictionalforcesbetweenthecylinderandtherollersarelargerthanthemaximumaxialfrictionalForce,andcylinderproducesfrictionalslidingagainsttherollersBecauseofIheexistenceofslidingfrictionalresistance.Vaisnolongerlincartyincreasedwiththeincrementoftanβ4Withtheincrementoftanβ4theincrementofVa;withgraduallybecomesmaller(2)Thefollowingthreeexperimentswerearrangedtostudythecylinder’snon-compatibleaxialmotionfurther,deflectingpositivelyoneroller.tworollersandthreerollersbythesamespiralangletomeasurethreecurvesbetweenSaandvTheexperimentalresultsareshowninFig7.Withtheincrementinthenumberofdeflectedrollers,Vabecomesgreater.ieVa3>Va2>Va1Whenthenumberofdrivenrollersdeflectedisvaried,thedegreeofthecylinder’snon-compatibleaxialmotionwillbechanged.Withtheincrementofthenumberoflollersdeflectedbythesamespiralangle.thecompatiblecomponentbecomesgreater,butthenon-compatiblecomponentbecomessmaller.Inotherwords,thecylinder’saxialmotionwillbetransformedfromnoncompatiblemotiontocompatiblemotion.Thus,Vabecomesgreateralso,ultimately,beingequaltothecompatibleaxialvelocitydeterminedbythespiralangleβNow.thefourrollershavethesamespiralanyleβ.SothatVais:2.2.2effectofcircularlinearvelocityDeflectingdrivenrollerNo4toaspiralangleof+2”fromtheequilibriumposition,thecylinderwillsufferaxialdrifting,Fig.8showstheVa-Vccurve,whichlatterindicatesthatVaisdirectlyproportionaltoVc,theslopeofthecurvebeingapproximately0.00708becauseβ4=+2istoosmall,thecylinderdoesnotmakefrictionalslidingagainsteachroller.Thus,therelativeaxialmotionbetweentherollerandthecylinderiscompletelycoordinatedbytheirelasticsliding,sothatVaise.VaisdirectlyproportionaltoVeForthetheoreticalCurvetheslopeK*canbecalculatedbythefollowingequationK”=0.25tanβ4=0.25tan2'=0.00873whereK=0.00708mm/sintheexperimentalcurve.Thus,intakingaccountoftheexperimentaltolerance,thetwoslopescanbeconsideredtobeapproximatelyequal.3Conclusions(1).Becauseofthedeviationsduetomanufacturingandassembling.thecylinder’scentrallineandtheroller’saxisarenotparallel.i.e,theyarenotinthesameplane,andthereisaspiralangleβatthcpointofcontactbetweenthecylinderandtherollerinthecircularlinearvelocitydirection.Theexistenceofβisthebasicreasonfortheoccurrenceofaxialdrifting.Theeffectofgravityincylinder’saxialdirectionisalsooneofreasons