专业外语第次课课件

Chapter8Lathe

39.BriefDescriptionofTypicalLathe

Vocabulariesandterms:work机件;作业;工件;工作;功;劳;著作traverse【数学】横截线；【机械工程】横动；【计算机】穿程；【法律】否认，反驳，抗辩；【炮】炮口的转动。indebtedadj.负债的,感恩的bed【机械工程】底座；衬；机床床身headstock车头箱，车床头,主轴箱tailstock[机]尾架,尾座,顶针座,2008139.BriefDescriptionofTypicalLathesaddle【机械工程】凹座，轴鞍，鞍座板；滑动座架；滑板；锅炉座drivingmotor主动[驱动]电动机switchgear开关bearing承托部分;方位;支撑点;支承;支承面;支座lubricate【机械工程】涂油，上油；使润滑；润;润滑；〔俚语〕(为了使事情进行顺利些等目的)劝酒；行贿，收买toothedgearing齿轮传动gearbox变速器;齿轮箱;进刀箱;进给箱2008239.BriefDescriptionofTypicalLatheintegrate结合gearing齿轮传动housed封装的relieved卸；释pull拖;拖曳;牵;牵引;拉;拉手;曳;吸引;扳ways【机械工程】(车床等的)导轨poppet随转尾架;提升头;下水支架2008339.BriefDescriptionofTypicalLathespurpinion正小齿轮engaging连接；进入；结合；啮合；rack【机械工程】齿条，齿轨；饲草架，马槽splitnut开口螺母；nutandbolt(NAB)螺母及螺栓interlocked联锁;互锁cross四通;杂交;横的;十字形;交叉;直角器swivel转环;转体2008539.BriefDescriptionofTypicalLathedial钟面;数字盘;示数盘;标度盘;标度盘;表盘;拨号盘;调节控制盘;针盘;分度盘;分划;号码盘;号盘;度盘graduate给(量杯等)标上刻度；在(表、尺等上)分度backlash名词反击；后座；(政治方面)强烈的反响；(任何)对抗性的反应；【机械工程】轮齿隙；齿隙游移；钓丝缠结Graduations(pl.)表示经纬度的线;刻度;分划，分度remark表示;评语;批注;注视;注意2008639.BriefDescriptionofTypicalLathetoolpost刀架tobegeared把齿轮装上(机器等)，使扣上齿轮；开动(机器等)

2008739.BriefDescriptionofTypicalLathe

Thelatheisamachineinwhichworkisheldsothatitcanberotatedaboutanaxiswhilethecuttingtoolistraversedpasttheworkfromoneendtotheothertherebyformingittotherequiredshape.2008839.BriefDescriptionofTypicalLatheAgoodexampleofamodernprecisionlatheisshowninFig.59.ItistheModelCNo.10,builtbyMessrs.HolbrookMachineToolCo.Itd.,Stratford,London,towhomtheauthorisindebtedfortheloanofphotographsandfortechnicalinformation.20081039.BriefDescriptionofTypicalLatheThelatheconsistsessentiallyofabed,headstock,tailstock,andsaddle.Thebedisaboxcastingwithmachined“ways"or“shears"onitsuppersurfaceandisboltedtoaheavybasecastingwhichprovidesatrayto20081139.BriefDescriptionofTypicalLathewhichthespindleBrotates.Thesebearingsareautomaticallylubricatedbyamechanicalpumpandaredesignedtoworksatisfactorilyunderextremeconditionsoflowspeedswithheavy20081339.BriefDescriptionofTypicalLathecutsandhighspeedswithlightcuts.Twelvedifferentspindlespeedsareprovidedrangingfrom23to2,000r.p.m.Thesespeedsareobtainedpartlybyelectricalmeans-thedrivingmotorbeinga20081439.BriefDescriptionofTypicalLathethree-speedone-andpartlybytoothedgearing.Onegearbox,providingtwospeeds,isbuiltintegralwiththemotorunitandiscontrolledbytheleverC,whilegearinghousedintheheadstockandmotorcontrolled20081539.BriefDescriptionofTypicalLatheThetailstockFisfreetoslidealongthebedwaysbutcanbelockedinanypositionbytheleverG;itcarriesthe“poppet"whichcanbeadjustedinandoutbythehandwheelH1andascrew.ThepoppetislockedbyleverJ.20081739.BriefDescriptionofTypicalLatheThesaddleKisfreetoslidealongthebedwaysandcarriesthecompoundsliderestL,M,NwhilethesaddleapronPcarriesthegearinggivingtheself-actuatingfeedsandalsothelead-screwnut.The20081839.BriefDescriptionofTypicalLatheslidingofthesaddlealongthebedisdonebymeansofaspurpinioncarriedinbearingsintheapronandengagingtherackQfixedtothebed.Thespurpinioncanbeturnedeither20081939.BriefDescriptionofTypicalLathefromtheheadstockspindlethroughgearboxesVandWwhichprovidearangeoffeedsfrom0.003upto0.020in.perspindlerevolution.Forscrewcuttingthe20082139.BriefDescriptionofTypicalLathesaddleistraversedbythelead-screwwhich,likethefeedshaft,isdrivenfromthespindlethroughthegearboxesVandW.Asplitnutcarriedintheaproncanbeengagedwiththeleadscrewby20082239.BriefDescriptionofTypicalLathemeansoftheleverYwhichisinterlockedwiththeleversTandZtopreventthenutbeingengagedwhilethefeedsareinuse.20082339.BriefDescriptionofTypicalLathescreweithermanuallybyahandwheelormechanicallybythefeedshaft,thisdrivebeingengagedbytheleverZ.Adial,graduatedinthousandthsofaninch,iscarriedbythe20082539.BriefDescriptionofTypicalLathecross-slidescrewandenablesaccurateadjustmentstobemade.Becauseofbacklashbetweenthenutandscrewthedialgraduationscanonlybereliedoniftheadjustmentisalwaysmadeinthesame20082639.BriefDescriptionofTypicalLatheAleverdcarriedbytheaproncontrolsthedrivingmotorswitchthroughashaftandenablesthemotortobestopped,started,or