《CA6140车床传动系统分析》.doc

遵义职业技术学院机电工程系 机电一体化专业毕业论文 论文题目：CA6140车床传动系统分析 学生姓名：王小青 指导教师：王永刚 专 业：机电一体化 年 级：机电D081班 学 号：0702080108 遵　义 职 业 技 术 学 院 二０一０年 11月 中国 贵州 遵义 目 录 摘要········································································································ 1 前言········································································································ 1 CA6140型普通车床的传动系统·························································· 1 外联系传动链···················································································· 2 三、车削外圆传动路线·············································································· 4 四、螺纹车削传动链················································································· 5 4.1公制·········································5 4.2英制········································ 5 4.3径节制······································ 4.4模数制螺纹······························· 五：结论································································································ 6 六、致谢································································································· 6 七、参考文献························································································· 7 摘 要 关键词： 前 言 一：CA6140型普通车床的传动系统 分析机床的传动系统时，应根据被加工工件的形状确定机床需要哪些运动，实现各个运动的执行件和运动源是什么，进而分析机床需要有哪些传动链。方法是：首先找到传动链所联系的两个端件(运动源和某一执行件，或者一个执行件和另一执行件)，然后按照运动传递顺序从一个端件向另一端件依次分析各传动轴之间的传动结构和运动传递关系，查明该传动链的传动路线以及变速、换向、接通和断开的工作原理。 机床运动计算按每一传动链分别进行，一般步骤为： (1) 确定传动链的两端件，如电动机—主轴，主轴—刀架等； (2) 根据传动链两端件的运动关系，确定它们的计算位移，即在指定的同一时间间隔内两端件的位移量。例如，车床螺纹进给传动链的计算位移为：主轴转一转，刀架移动工件螺纹一个导程L(单位为mm)； (3) 根据计算位移以及相应传动链中各个顺序排列的传动副的传动比，列写运动平衡式； (4) 根据运动平衡式，计算出执行件的运动速度(转速、进给量 等)或位移量，或者整理出换置机构的换置公式，然后按加工条件确定挂轮变速机构所需采用的配换齿轮齿数，或确定对其他变速机构的调整要求。 图2.4为CA6140型卧式车床的传动系统图，它是反映机床全部运动传递关系的示意图。 图2.4 CA6140型卧式车床的传动系统图 二：外联系传动链 在机床的运动分析中，为了便于分析机床运动和传动联系，常用一些简明的符号来表示运动源与执行件、执行件与执行件之间的传动联系，这就是传动原理图。图1为传动原理图常用的部分符号。 电动机 b)主轴 c)车刀 d) 定比传动机构 e)滚刀 f)合成机构 g)换置机构外联系传动链???? 联系运动源与执行件的传动链，称为外联系传动链。它的作用是使执行件得到予定速度的运动，并传递一定的动力。此外，还起执行件变速