数控卧式镗铣床刀库机械手升降机构设计与分析论文[带图纸].doc -- 45 元

毕业设计（论文）本科毕业设计论文题目数控卧式镗铣床刀库机械手升降机构设计与分析系别机电信息系专业机械设计制造及其自动化班级学生学号指导教师2013年05月毕业设计（论文）I数控卧式镗铣床刀库机械手升降机构设计与分析摘要数控卧式机床的发展与应用，大大降低了零件的加工辅助时间，提高了生产效率。随着数控机床的普及应用，机械加工的自动化程度大大提高，数控机床发展成了当今普遍应用的一种更新、更先进的制造设备。加工中心带有刀库和自动换刀装置，可以实现按照预定程序对工件进行多工序加工。数控卧式镗铣床是一种具有自动换刀装置和任意分度数控转台的数字控制机床，工件在一次装夹后能自动完成几个侧面的的多种工序的加工。数控卧式镗铣床刀库机械手升降机构由液动机、滚珠丝杠副、减速齿轮、摩擦片式电磁离合器等构成。了解刀库机械手升降机构的性能要求了解刀库机械手升降机构的工作原理，进行结构设计和计算分析液动机带动滚珠丝杠转动，带动手架运动，通过减速和离合器吸合，丝杠制动，使手架准确停在换刀位置，良好的结构设计能够实现刀库中刀具的快速更换，提高机床的加工效率。关键词升降机构JCS013数控镗铣床液动机滚珠丝杠手架离合器毕业设计（论文）IICNChorizontalboringandmillingmachinetoolstoragemanipulatorliftingmechanismdesignandanalysisAbstractWiththedevelopmentofNC,theautomatictoolchangersystemismoreandmoreimportantinthemodernadvancedmanufacture,becausetheATCcanshortenthecycletimeofproductmanufacturing,improvetheprecisionofproductmachining.Thelatestrequirementsofmachinetoolusercompriseofdiversificationofcontrolobject,complexityofprocess,flexibleofapplicationandhighreliability.Thefunctionoftoolmagazineisthatstoresthetoolandmovesthetoolwhichwillbeusedinthenextmanufacturingprocesstotherightchangeoverpositionandrobotwillfinishthechangeovertool.CNChorizontalboringandmillingmachineisaautomatictoolchangedeviceandarbitraryindexingofdigitalcontrolmachinetoolncrotarytable,Afteraclampingworkpiececanautomaticallycompleteseveralprofilesofavarietyofmachiningprocess.CNChorizontalboringandmillingmachinetoolstoragemanipulatorliftingmechanismbytheLiquidmotive,Theballscrewvice,Reductionear,Frictionplateelectromagneticclutch,etc.Understandingofknifelibrarymanipulatorliftingmechanismperformancerequirements,Theunderstandingoftheprincipleofoperationofknifelibrarymanipulatorliftingmechanism,Structuredesignandcalculationanalysis,Liquidmotivationdrivestheballscrewrotation,leadframehandmovement,Byslowingdownandclutchandscrewbrake,makehandaircraftparkedinknifepositionaccurately,Gooddesigncanbringaboutquickreplacementknifetoolinlibrary,improvetheprocessingefficiencyofmachinetool.KeywordsLiftingmechanismCNChorizontalboringandmillingmachineLiquidmotiveBallscrewHandClutch毕业设计（论文）III目录1绪论....................................................................................................................11.1数控镗铣床的结构组成...................................................................................11.2国内外数控机床的发展...................................................................................21.2.1国内外数控卧式镗铣床的现状..................................................................21.3数控机床的发展趋势.......................................................................................51.3.1高速化、高精度化、高可靠性..................................................................51.3.2复合化..........................................................................................................61.3.3智能化..........................................................................................................61.3.4柔性化、集成化..........................................................................................62数控卧式镗铣床刀库机械手升降机构设计............................................72.1设计目的..........................................................................................................72.2设计内容..........................................................................................................72.3升降机构的组成和运动...................................................................................72.3.1升降机构的组成..........................................................................................72.3.2手架升降机构的运动.................................................................................83升降机构驱动电机.........................................................................................83.1升降电机的选择..............................................................................................93.1.1升降电机的理论分析.................................................................................93.1.2升降电机的选择........................................................................................103.2电机调速........................................................................................................113.2.1变频调速原理...........................................................................................123.2.2变频器选型时要确定以下几点................................................................12毕业设计（论文）IV4摩擦片式电磁离合器的选用......................................................................134.1转矩特性.........................................................................................................144.2动作特性.........................................................................................................144.3散热特性与寿命.............................................................................................144.4摩擦片式电磁离合器的测试方法.................................................................154.4.1静力矩的测定............................................................................................154.4.2动力矩的测定............................................................................................154.4.3空转力矩的测定........................................................................................154.4.4残留力矩及力矩消灭时间的测定............................................................164.5选用电磁离合器的注意事项.........................................................................165滚珠丝杠副的选用.......................................................................................175.1滚珠丝杠副的工作原理.................................................................................175.2滚珠丝杠副的类型.........................................................................................185.2.1外循环........................................................................................................185.2.2内循环.......................................................................................................185.3滚珠丝杠副的传动特点.................................................................................185.4滚珠丝杠的选用指标.....................................................................................195.5滚珠丝杠副的设计计算.................................................................................205.6滚珠丝杠的保护.............................................................................................246控制系统..........................................................................................................256.1模拟式.............................................................................................................256.2数字式.............................................................................................................256.2.1行程开关....................................................................................................256.2.2接近开关....................................................................................................25