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1、（习题集答案）专业班级姓名学号机械工程学院2013年3月solicitedopinionsandsuggestionsArticle265,including:fourproblemsto171.Deepeningspecialregulation,StatelineStatemodified,sidechecksidemodified,totalsolutionhighlightproblem19a;torectificationspiritcarriedoutpartypoliticallife,in-depthcar
2、riedouthearttalk,seriouscarriedoutcriticismandself-critical;putbuiltchapterStatebusinessthroughoutactivitiesalways,fullcleanupandestablishedperfectainvolved"fourwind"aspectsofsystemprovides,new12items,amendmentperfect15items,abolition3items.Througheducationalpract
3、ices,"fourwinds"problemsignificantlycurb,partymembersandcadres'apparentchangeofconsciousnessandabilityofservingthemassesincreasedsignificantly.(C)topromotethesustainedandhealthydevelopmentofeconomyandsociety.Adheretothe"party-ledtownship,prosperingTownship,eco-vil
4、lage,projectspromotingTownshipandindustrialTownship,industry-richTownship,harmonyTownship,stabilizationcontrol"developmentstrategy,takeeconomicconstructionastheCenter,strengthenleadershipovertheeconomicworkinearnest,closelyaroundthetargetdeterminedearlierthisyeart
5、odealwithandtrytoresolvethevariousadversefactors,paycloseattentiontothework.Effortstopromotingtheconstructionofmajorprojects.Totransportation,waterconservancy,urbaninfrastructureconstruction,focusingonimplementationofanumberofindustrialstructureadjustmentandoptimi
6、zationandupgradingofkeyprojectsforleadingroles;CompletedhasXXvillagepassvillageHighway,andtownshiplocationlightsbrightof,andXXmeters"beautifulvillage",andtownshippublicrentalandXianghospitalspublicrental,and270setsruralhousingroom模块一切削加工理论及应用第1章切削加工理论一、简答题1.写出车外圆、
7、钻孔、拉孔、镗孔及铣削平面这几种加工方法的主运动和进给运动。【答题要点】加工方法主运动进给运动车外圆工件旋转运动车刀沿轴向运动钻孔钻头旋转运动主轴（台）沿轴向运动拉孔拉刀直线运动无进给运动镗孔镗刀（镗杆）旋转运动工作台轴向或径向进给运动铣平面铣刀旋转运动工作台沿X、Y或Z轴进给2.刀具角度有哪些作用？主偏角与刃倾角确定了刀具哪一结构的空间位置？【答题要点】刀具角度作用：（1）确定刀刃和刀面在空间的位置及关系；（2）确定刀具的切削性能。主偏角与刃倾角确定了住切削刃的空间位置。3.在定义切削速度、刀具参考系和刀具角度时，为何要
8、强调“切削刃上选定点”这一表达？【答题要点】由于大多数刀具的切削刃是曲线，因此切削刃上不同点的位置、直径、切线不同，因此在定义切削速度、刀具参考系和刀具角度时，必须要强调切削刃上选定点。4.刀具法平面参考系和正交平面参考系有何异同？在法平面和正交平面内的前角和后角有何关系？什么情况下与重合？【答题要点】
