2013届机械设计制造及其自动化（数控）毕业设计（论文）毕业设计（论文）题目数控车床自动回转刀架的设计1目录绪论…………………………………………………………………………………………………1第一章数控车床回转刀架概述.....................................................................................................11.1数控车床刀架的介绍.........................................................................................................11.2数控车床刀架的分类.........................................................................................................1第二章回转刀架方案选择.............................................................................................................12.1数控车床回转刀架的基本要求…………………………………………………………12.2立式数控回转刀架的结构特点………………………………………………………….22.3刀架参数的确定…………………………………………………………………………..32.4动力源的选择及方案选择结果…………………………………………………………..4第三章回转刀架的工作原理及过程.............................................................................................53.1电动刀架工作原理.............................................................................................................53.2四方刀架的主要构成部分.................................................................................................5第四章回转刀架的设计及计算.....................................................................................................64.1夹紧力的计算.....................................................................................................................64.2最大切削扭矩.....................................................................................................................74.3单工位换刀时间.................................................................................................................74.4定位精度……………………..…………………………………………………………...9第五章主传动机构的设计和标准件的选取...............................................................................105.1初拟传动方案……………………………………………………………………………105.2选择步进电动机…………………………………………………………………………105.3蜗轮蜗杆的设计...............................................................................................................105.4中心轴强度校核....................................