毕业论文-最大加工直径-φ250普通车床主轴箱部件设计课程设计任务书.doc

目录 1.课程设计任务书·····························································4 2.绪论·······································································6 3．设计计算···································································6 3.1车床的规格系列和用处···················································6 3.2操作性能要求···························································7 4.主动参数参数的拟定·························································7 4.1 确定传动公比φ·························································7 4.2 主电动机的选择·························································7 5.变速结构的设计·····························································8 5.1 主变速方案拟定··························································8 5.2 变速结构式、结构网的选择·················································8 5.2.1 确定变速组及各变速组中变速副的数目································8 5.2.2 变速式的拟定······················································9 5.2.3 结构式的拟定······················································9 5.2.4 结构网的拟定······················································9 5.2.5 结构式的拟定·····················································10 5.2.6 结构式的拟定·····················································10 5.2.7 确定各变速组变速副齿数···········································11 5.2.8 绘制变速系统图···················································13 6.结构设计··································································13 6.1 结构设计的内容、技术要求和方案··········································13 6.2 展开图及其布置·························································14 6.3 I轴（输入轴）的设计······················································14 6.4 齿轮块设计·····························································14 6.5 传动轴的设计···························································15 6.6 主轴组件设计···························································16 6.6.1 各部分尺寸的选择·················································16 6.6.2 主轴材料和热处理·················································16 6.6.3 主轴轴承··················································