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1、第10次课的教学整体安排授课时间第10周周4第3、4节课时安排2授课题目(教学章、节或主题):Lathes教学目的、要求(分掌握、理解、了解三个层次):掌握本课的专业词汇学习并掌握专业英语的翻译技巧教学内容(包括基本内容、重点、难点):LathesEngineLathes;TracerorDuplicatingLathes;TurretLathes;AutomaticScrewMachine;VerticalTurretLathes;MachiningCenter讲解课文和专业词汇重点:在翻译的过程中句子表达的准确性和整篇文章的逻辑
2、性。难点:在科技英语翻译过程中语言的转换技巧讨论、思考、作业:作业:复习课文背诵专业词汇参考资料(含参考书、文献等):教学过程设计:复习10分钟,授新课90分钟,安排讨论 分钟,布置作业 分钟授课类型: 理论课 讨论课 实验课 练习课 其他教学方式: 讲授 讨论 指导 其他教学资源: 多媒体 模型 实物 挂图 音像 其他填写说明:1.每项页面大小可自行添减;2.教学内容与讨论、思考题、作业部分可合二为一。14Lathes车床Lathesarewidelyusedinindustrytoproduceallkin
3、dofmachinedparts.Somearegeneral-purpose(通用的)machines,andothersareusedtoperformhighlyspecializedoperations.EngineLathes普通车床Enginelathes,ofcoursearegeneral-purposemachinesusedinproductionandmaintenanceshopsallovertheworld.Sizesrangefromsmallbenchmodelstohugeheavy-duty(重型
4、的)pieceofequipment.Manyofthelargerlathescomeequippedwithattachmentsnotcommonlyfoundintheordinaryshop,suchasautomaticstopsforthecarriage.TracerorDuplicatingLathes仿形/靠模车床Thetracerorduplicatinglatheisdesignedtoproduceirregularlyshapedpartsautomatically.Thebasicoperationof
5、thislatheisasfollows:Atemplate(模板、模型)ofeitheraflatorthree-dimensionalshapeisplacedinaholder.Aguiderorpointer(仿形指)thenmovesalongthisshapeanditsmovementcontrolsthatofthecuttingtool.Theduplicationmayincludeasquareortapered(锥形的)shoulder(台肩),grooves,tapers(锥体),andcontours.W
6、orkssuchasmotorshafts,spindles,pistons,rods,caraxles,turbineshafts,andavarietyofotherobjectscanbeturnedusingthistypeoflathe.TurretLathes转塔车床ATurretlatheisbasicallysimilartoanenginelatheexceptthattheconventionaltoolpostisreplacedwithahexagonalturret,whichcanberotatedaro
7、undaverticalaxisasrequired.Appropriatetoolsaremountedonthesixsidesoftheturret.Thelengthofeachtoolissoadjustedthatbysimplyindexing(转动)theturret,anytoolcanbebroughtinexactlythedesiredoperatingcondition.Thosecuttingtoolscan,thereforebeemployedsuccessively(依次地)withoutthene
8、edfordismountingthetoolandmountinganewoneeachtime,asthecasewithconventionalenginelathe.Thisresultinanappreciatesaving