外文翻译车床及其结构

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1、郑州工北应用技木学院学生课程考核专亚夕卜文翻译译文:原文：TheLatheandItsConstruction车床及其结构学院：机电工程学院专免：机械设计制造及其自动化班级：机械四班课程：机械工程专北英语学生姓名：学号：时间：2015年1月6号成缴评定TheLatheandItsConstructionAlatheisamachinetoolusedprimarilyforproducingsurfacesofrevolutionandflatedges.Basedontheirpurpose,construction,numberoftoolsthatcansimultaneousl

2、ybemounted，anddegreeofautomation,lathes-or，moreaccurately,lathe-typemachinetoolscanbeclassifiedasfollows:(l)Enginelathes(2)Toolroomlathes(3)Turretlathes(4)Verticalturningandboringmills(5)AutomaticIathes(6)SpeciaI-purposelathesInspiteofthatdiversityoflathe-typemachinetools，theyallhavecommonfeatur

3、eswithrespecttoconstructionandprincipleofoperation.Thesefeaturescanbestbeillustratedbyconsideringthecommonlyusedrepresentativetype，theenginelathe.Followingisadescriptionofeachofthemainelementsofanenginelathe,whichisshowninFig.11.1.Lathebed.Thelathebedisthemainframe,involvingahorizontalbeamontwov

4、erticalsupports.Itisusuallymadeofgreyornodularcastirontodampvibrationsandismadebycasting.lthasguidewaystoallowthecarriagetoslideeasilylengthwise.Theheightofthelathebedshouldbeappropriatetoenablethetechniciantodohisorherjobeasilyandcomfortably.Headstock.Theheadstockisfixedatthelefthandsideofthela

5、thebedandincludesthespindlewhoseaxisisparalleltotheguideways(theslidesurfaceofthebed).Thespindleisdriventhroughthegearbox，whichishousedwithintheheadstock.Thefunctionofthegearboxistoprovideanumberofdifferentspindlespeeds(usually6upto18speeds).Somemodernlatheshaveheadstockswithinfinitelyvariablesp

6、indlespeeds,whichemployfrictional^electrical，orhydraulicdrives.Thespindleisalwayshollow，i.e.，ithasathroughholeextendinglengthwise.Barstockscanbefedthroughthatholeifcontinuousproductionisadopted.Also,thatholehasataperedsurfacetoallowmountingaplainlathecenter.Theoutersurfaceofthespindleisthreadedt

7、oallowmountingofachuck,afaceplate，orthelike.Tailstock.Thetailstockassemblyconsistsbasicallyofthreeparts，itslowerbase,anintermediatepart，andthequill.Thelowerbaseisacastingthatcanslideonthelathebedalongtheguideways，andithasacl