手柄的设计及车削加工.doc

机械工程学院 专业课 课程设计说明书 设 计 题 目： 手柄的设计与车削加工 专 业： 　 　机械设计制造及其制动化 班 级： 　 　　 姓 名： 学 号 　 指 导 教 师： 2010年 12 月 27日 目录 一、零件分析···········································2 1、零件的作用············································2 2、零件的工艺分析概述···································2 3、零件的工艺分析·······································2 二、确定毛坯尺寸，设计毛坯图···························3 1、确定机械加工余量，毛坯尺寸和公差··················3 2、确定机械加工余量·····································4 3、确定毛坯尺寸··········································4 4、确定毛坯尺寸公差·····································4 5、设计毛坯图············································5 三、基准的选择··········································5 1、选择基准················································5 2、制定工艺路线···········································5 四、工序设定············································8 1、机床的选择··············································8 2、刀具的选择··············································8 3、量具的选择··············································8 五、确定切削用量及基本时间······························9 六、小结················································17 七、参考文献············································18 设计“CA6140手柄轴”零件图（如下图）机械加工工艺规程。年产10000件。 一、零件的分析 1.零件的作用 题目所动力；二是工作过程中经常承受载荷；三是支撑传动零部件。 从零件图上看，该零件结构比较简单，其主要加工的面有φ、φ0的外圆柱面，，图中所给的尺寸精度高，大部分是IT6级；粗糙度方面表现在键槽两侧面、φ圆柱表面为Ra, φ16外圆柱面Ra1.6,锥面凸台及端面为Ra, φ15.7键槽为Ra3.2，其余为Ra6.3要求不高位置要求较严格，表现在φ的端面、φ0圆柱面热处理方面需要调质处理，到200HB，保持均匀。 通过分析该零件，其布局合理，方便加工，我们通过径向夹紧可保证其加工要求，整个图面清晰，尺寸完整合理，能够完整表达物体的形状和大小，符合要求。毛坯的选择和拟定毛坯图是制定工艺规程的最初阶段工作之一，也是一个比较重要的阶段，毛坯的形状和特征（硬度，精度，金相组织等）对机械加工的难易，工序数量的多少有直接影响，因此，合理选择毛坯在生产占相当重要的位置，同样毛坯的加工余量的确定也是一个非常重要的问题。 毛坯种类的选择决定零件的实际作用，材料、形状、生产性质以及在生产中获得可能性，毛坯的制造方法主要有以下几种：1、型材2、锻造3、铸造4、焊接5、其他毛坯。根据零件的材料，推荐用型材或锻件，但从经济方面着想，