外文翻译--热连轧机.doc

ABSTRACTThereareprovidedanevennumberofpairedroll-shifttyperollingmills12a,12bandacontroller16forcontrollingtherollingmills12a,12b.Eachofupperandlowerworkrolls13ofeachoftheroll-shifttyperollingmillshasapredeterminedcrowncurveandhasarollshiftingmechanism14foraxiallyshiftingtheupperandthelowerworkrollsrelativetoeachother.Thecontroller16determinesashiftamountofeachrollingmillinordertoobtainapredeterminedcrosssectionshapeofasteelplate,shiftstheworkrollsoftherollingmillontheupstreamsidepairedeveryrollingcoiltotherebydispersewearontherollsurface,andmovestheworkrollsoftherollingmillonthedownstreamsideofthepairinapredetermineddirectionbythesamedistance,therebycancelingthechangeinthecrosssectionshapeoftheplatebytheshiftingoperationfortheweardispersion.摘要有一对轧辊轴向移动式轧机12a，12b以及控制轧机12a，12b的控制器16。每组轴向移动的轧辊机中的工作轧辊13的各自上边缘与下边缘都有预定的凸边曲线，同时轧辊移位装置14用以控制上下工作轧辊彼此间的轴向相对移动。控制器16控制每一个轧机的位移量为了获得钢板的预定截面形状，它通过移动轧机每组成对的轧辊中上边的工作轧辊上的每组成对的轧辊以此来使轧辊的上下表面的离差，同时使轧机成对工作的下方的轧辊在预定的方向上移动同样的距离，以此通过改变磨轧的离差的过程来撤销板的截面形状的变化。1HOTTANDEMROLLINGMILLBACKGROUNDOFTHEINVENTION1.FieldOfTheInventionThepresentinventionrelatestoahottandemrollingmillwhichcanperformbothshapecontrolbyshiftingrollsandweardispersion.2.RelatedBackgroundArtAroll-shifttyperollingmillschematicallyshowninFIG.1(forexample,U.S.Pat.No.5,640,866,JanpanesePatentLaid-OpenNo.7-232202,andthelike)isknownasarollmillusedtoobtainaveryflatplateproduct.Accordingtotheroll-shifttyperollingmill,upperandlowerworkroll1havingconvexandconcavepartsasshowninU.S.Pat.No.5,640,866arealternatelyshiftedintheaxialdirectionoftherolls,androllaplatemember2,therebycontrollingtheshapeincrosssectionoftheplatemember.Ontheotherhand,inanordinaryhotfinishingrollingmill,arollingpartofthesurfaceofarolliswornasthenumberofplateswhicharerolledincreases.Especially,theendpartsoftherollarewornmornthanthecenterpart.Whenaplatetoberollednextiswide,thecrosssectionoftheplatehasashapeinwhichthebothendsarethicker(thosearecalledcatsears)asschematicallyinFIG.2andtherolledshapedeteriorates.1热连轧机发明的背景1、发明的领域本发明与热连轧机相关，它通过转动轧辊以及磨轧离差来控制是板面的形状。2、相关技术背景图1所示的是轧辊滚动式轧机的原理简图（例如，U.S.Pat.No.5,640,866,JanpanesePatentLaid-OpenNo.7-232202等），它是用来获取平钢板产品的轧制设备。根据轧辊移动式轧机,工作辊1的上部和下部有如图U.S.Pat.No.5,640,866凸、凹部分是在轴向尺寸交替变化的轧辊。轧制板面2可以控制整个板面的截面形状。另一方面，一个普通的完备的热轧机中，轧辊表面轧制部分的外形的磨损是随着已被轧制钢板的数目越来越厉害。特别是，轧辊末端磨损大于中间部分。当下一个待轧钢板很宽时，钢板的横截面会形成两端厚的形状（那些被形象地称为猫耳朵）如简图2所示，同时这个卷形会变形。Inaconventionalhotfinishingrollingmill,therefore,thewidthofaplatecannotbefreelychangedandrollingoperationisperformedaccordingtoapredeterminedoperationschedule(calledacoffinschedule)asshowninanexampleofFIG.3.AccordingtotheexampleofFIG.3,theaxisofabscissadenotesthenumberofrollingcoilsafterrollreplacementandtheaxisofordinateshowstherollingwidthofplates.Inordertoobtainanecessaryplatewidth,rollingoperationfornarrowplatesisrepeatedandtherollsarewarmed,andplatemembersarerolledinaccordancewiththeorderofthewiderplatemembers.Othervariousoperationschedulesareusedaccordingtohotfinishingrollinglines.在传统的热轧机，要求钢板的宽度不可以随意变动，根据预定的运行流程（所谓的密闭流程）轧制流程正如图3的例图所示。根据图3的例图，轴的横坐标表示通过轧制的轧辊数目，纵坐标代表轧板的轧制宽度。为了获取一个需要的轧板宽度，轧制系统将窄轧板重复轧制，轧辊在轧制前要预热。钢板的轧制要按照宽钢板的轧制顺序。其他的各种轧制过程依据热轧相关规则。Intheconventionalhotfinishingrollingmill,asmentionedabove,sincetherollingoperationisperformedaccordingtoapredeterminedoperationschedule,thereisaproblemthatschedule-freerollingoperationwhichisperformedirrespectiveoftheplatewidthcannotbeexecuted.上面提到的传统的热轧机，由于轧制操作是根据预定的操作流程来执行的，那么将导致一个问题，即不考虑钢板宽度的自由规程轧制过程降无法执行。Consequently,therehasbeenproposedthattheupperandlowerworkrollsareaxiallyshiftedrelativetoeachotherbyusingtheabove-mentionedroll-shifttyperollingmill,therebydispersinglocalwearofthesurfaceoftherollandachievingtheschedule-freerollingoperation.Inthiscase,however,sinceashiftingfunctionisusedtodispersethewearofthesurfaceoftheroll,thereisaproblemthataninherentcontrolofthecrosssectionshapecannotbeperformed.因此，由已经提出的，上下工作辊根据上述的滚扎轧辊移动式轧机的原理，通过彼此相对的轴向移动，从而分散轧辊表面的磨轧，而实现自由规程轧制。然而在这种情况下，由于移动的运行使轧辊的表面离差产生，将导致一个不可避免的问题，即截面形状的控制无法保证。Thatis,hitherto,thefunctionofshiftingtheupperandlowerworkrollsoftheroll-shifttyperollingmillintheaxialdirectionisusedtocontrolthecrosssectionshapeofasteelplate.Theshiftingfunctionis,however,usedfordispersingthewearoftheroll,sothattheshapecannotbecontrolled.Thereisconsequentlyaproblemthattheweardispersionandthecrosssectionshapecontrolareincompatible.这是迄今为止，通过利用轧辊移动式轧机的上下工作轧辊在轴向的移动功能来控制钢板的截面形状。然而，这个移动的功能是使轧辊相互错位，以致无法控制形状。因此，表面的形状的不平整性和截面形状的控制仍存在不相容性问题。SUMMARYOFTHEINVENTIONThepresentinventionisprovidedinordertosolvetheproblems.Thereforeitisanobjectofthepresentinventiontoprovideahottandemrollingmillwhichcanrealizebothofschedule-freerollingoperationbydispersingwearofthesurfaceoftherollandacontrolofacrosssectionshapeofasteelplate.该发明的概括现今的发明是为了解决问题。因此本连轧机的发明，在实现分散轧辊表面的离差的同时，又控制钢板截面的面积而完成自由规程轧制。Accordingtothepresentinvention,thereisprovidedahottandemrollingmillhavingroll-shifttyperollingmillsofanevennumberwhicharepairedandacontrollerforcontrollingtherollingmills.Eachofupperandlowerworkrollsofeachoftheroll-shifttyperollingmillshasapredeterminedcrowncurve.Thereisalsoprovidedarollshiftingmechanismforaxiallymovingtheupperandlowerworkrollsrelativetoeachother.Thecontrollerdeterminesashiftamountofeachrollingmillinordertoobtainapredeterminedcrosssectionshapeofasteelplate,shiftstheworkrollsoftherollingmillontheupstreamsideofapairbyapredeterminedamountbyusingtheshiftpositionasacenterforeveryrollingcoiltotherebydispersewearofthesurfaceoftheroll,andmovestheworkrollsoftherollingmillonthedownstreamsideofthepairinapredetermineddirectionbythesamedistance.therebycancelingthechangeinthecrosssectionshapeoftheplatecausedbytheshiftingoperationfortheweardispersion.本发明所提供的热连轧机，有两个成对的轴向移动式轧机和控制轧机的控制器。每个轴向移动式轧机的上下工作辊都有预定的凸度曲线。也提供了使上下工作轧辊在轴向相对彼此的转移机械装置。该控制器控制每个轧机的移量为了获得钢板的预定横截面形状，它通过转移位置作为中心改变轧机中的一对工作轧辊的上游移量用以分散轧辊的表面离差。同时移动一对下游轧机在工作轧辊在预定方向相同的距离。从而撤销由磨损离差在移位操作过程中引起的板的截面形状的改变。Accordingtotheconstructionofthepresentinvention,sincerollingoperationisperformedbyaxiallyshiftingtheworkrollsoftheroll-shifttyperollingmillsofanevennumberwhicharepairedbyusingtheshiftpositiondeterminedtoobtainapredeterminedplatecrownforeveryrollingcoil,thewearofthesurfaceofeachrollcanbedispersed.Further,byperformingtherollingoperationoftherollingmillsontheupstreamanddownstreamsidesinapredetermineddirection(forexample,oppositedirectionorthesamedirection)bythesamedistance,thechangeinthecrosssectionshapeofthesteelplatecausedbytheshiftingoperationtodispersewearoccurringintherollingmillontheupstreamsidecanbecanceledbytherollingmillonthedownstream.Sincetheplatecrowniscontrolledbychangingthecenterpositionoftheschedule-freerollingoperationandthecontrolofthecrosssectionshapeofthesteelplate,thatis,theplatecrowncontrolbythedispersionofthelocalwearoftherollsurfacecanbecompatiblyperformed.根据本发明，轧制系统通过成对的轧机的工作轧辊的轴向移位，利用确定位置的转变来获得每个扎卷板预定的钢板凸度，以及各个轧辊表面的离差可以被分离。此外，在轧机轧制系统预定方向（例如,相反的方向或同一方向）上的上、下游移动的同样距离，由于发生在轧机在上游的移位操作的分散磨损所导致的钢板截面的变化可以在轧机的下游所撤销。由于板的凸度是由自由规程轧制系统的中心位置变动和钢板截面形状的控制的改变，即由轧辊表面的局部磨损离差所导致的板的凸度控制可以妥善地得到解决。Theotherobjectsandadvantageousfeatureofthepresentinventionwillbecomeapparentfromthefollowingdetaileddescriptionwithreferencetotheappendeddrawings.BRIEFDESCRIPTIONOFTHEDRAWINGSFIG.1isaschematicdiagramshowingaconventionalroll-shifttyperollingmill；FIG.2showsanexampleofacrosssectionshapeofaplateduetowearofrolls；FIG.3showsanexampleofoperatingscheduleinaconventionalhottandemrollingmill；FIG.4isadiagramshowingthewholeconstructionofahottandemrollingmillaccordingtothepresentinvention；FIG.5issdiagramexplainingtheprincipleofthepresentinvention；FIG.6Aisadiagramshowingarollshiftstateofanodd-number