1 绪论 ....................................................................5
1.1 选题的背景及意义...................................................5
1.2 数控机床的发展情况.................................................5
1.3 设计任务...........................................................6
2 主传动系统设计 ..........................................................7
2.1 概述...............................................................7
2.2 分级变速箱的设计...................................................7
2.2.1 分级变速箱的变速级数 .........................................7
2.2.2 传动公比φ的确定 .............................................7
2.2.3 传动齿轮齿数的确定 ...........................................7
2.3 主轴组件的基本要求.................................................8
2.4 采用滚动轴承的主轴组件 .........................................9
2.4.1 支承方式的选择 ...............................................9
2.4.2 轴承间隙的调整与预紧 .........................................9
2.5 主轴尺寸设计.......................................................9
2.6 主轴组件的刚度计算................................................10
2.7 轴承润滑和主轴密封................................................11
2.8 本章小结..........................................................11
3 进给传动系统设计 .......................................................13
3.1 导轨轴向负载力计算................................................13
3.2 导轨的选型........................................................13
3.3 滚珠丝杠与支承轴承................................................14
3.3.1 滚珠丝杠的计算 ..............................................14
3.3.2 支承用轴承的选用 ............................................16
3.3.3 承载能力校验 ................................................16
3.4 驱动电机的选型与计算..............................................17
3.5 主要零部件的精度验算..............................................18
3.5.1 伺服刚度 KR..................................................18
3.5.2 丝杠的轴向拉压刚度 ..........................................18
3.5.3 轴承的轴向刚度 ..............................................18
3.5.4 滚珠与滚道的接触刚度 Kc......................................19
3.5.5 进给传动系统的综合拉压刚度 K.................................19
3.6 进给传动系统的动态特性分析........................................19
3.7 驱动电动机与滚珠丝杠的连接........................................19
3.8 本章小结..........................................................20
4 数控机床控制系统设计 ...................................................21
