1摘要本设计是把普通数控车床改造成经济型数控车床。经济型数控车床就是指价格低廉、操作使用方便、比较适合我国国情的，动化的机床。采用数控机床，可以降低工人的劳动强度，节省劳动力（一个人可以看管多台机床），减少工装，缩短新产品试制周期和生产周期，可对市场需求作出快速反应。在设计的时候具体进行了详细的各部件的选型和计算。比如：导轨的设计选型、滚珠丝杠螺母副的选型与计算。还进行了进给传动系统的刚度计算、进给传动系统的误差分析、驱动电机的选型计算、驱动电机与滚珠丝杠的联接、驱动电机与进给传动系统的动态特性分析等。【关键词】车床、数控、传动系统2AbstractThisprojectistoalterthecommonlatheintotheeconomicallathe.Theeconomicallatheisaadvancedandroboticizedlathethathaslowprice,convenientoperation,andadapttothesituationofourcountryandhasinstalledcncsystem.Duringtheprojectweparticularlydealtwiththechoiceandcalculationofeveryassembly.Suchas:Thechoiceandcalculationofguideway,ballscrewnutpairanddriveelectromotor.Caculatetheinflexibilityoffeedtransmissionsystem.Analysetheerroroffeedtransmissionsystem.Junctionbetweendriveelectromotorandballscrew.Dynamicanalysisofdriveelectromotorandfeedtransmissionsystem.【Keywords】Lathe；CNC；TransmissionSystem3目录摘要.............................................................1Abstract.............................................................2前言.................................................................41数控车床设计概述...................................................51.1电动机的选择....................................................61.2电动机类型和结构型式的选择......................................72进给伺服系统概述...................................................83横向进给系统的设计计算............................................103.1设计参数.......................................................103.2切削力及其切削分力计算.........................................103.3轨摩擦力的计算.................................................103.4算滚珠丝杠螺母副的轴向负载力...................................113.5定进给传动链的传动比i和传动级数...............................113.6珠丝杠的动载荷计算与直径估算...................................113.7珠丝杠螺母副承载能力校核.......................................133.8计算器械传动的刚度.............................................143.9驱动电机的选型与计算...........................................153.10械传动系统的动态分析..........................................183.11机械传动系统的误差计算与分析..................................183.12确定滚珠丝杠螺母副的精度等级和规格型号........................194进给系统的结构设计................................................204.1滚珠丝杠螺母副的设计...........................................204.2齿轮传动副的设计...............................................214.3齿轮箱的设计...................................................224.4床身及导轨.....................................................224.5中间轴的设计...................................................254.6轴承端盖的设计.................................................25总结与体会..........................................................26致谢词..............................................................27【参考文献】........................................................284前言我国目前机床总量380余万台，而其中数控机床总数只有11.34万台，即我国机床数控化率不到3％。近10年来，我国数控机床年产量约为0.6～0.8万台...
