输出轴的机械加工工艺及钻孔夹具 大学论文.doc

毕业设计(论文) 题 目：输出轴机械加工工艺规程制定 及钻孔专用夹具设计 院 （系）： 机械工程学院 专 业： 机械设计制造及其自动化 学生姓名： 学 号： 指导教师： 职 称： 教 授 2013 年 11月 20 日 目 录 摘 要··························································2 第一部分 零件分析·············································3 一. 零件的功用分析··········································· 3 二. 零件的工艺分析··········································· 3 第二部分 机械加工工艺规程制定·······························4 一. 毛坯的确定··············································· 4 二. 定位基准的选择··········································· 4 三. 加工方法的选择··········································· 4 第三部分 工艺路线的拟定······································· 6 一. 机械加工工序············································· 6 二. 热处理工序··············································· 6 三. 辅助工序················································· 7 四. 输出轴零件的工艺路线····································· 7 五. 确定加工余量及毛坯尺寸·································· 8 六. 工序设计················································ 13 七. 确定切削用量············································ 15 第四部分 钻床夹具的设计·····································25 一. 定位夹紧方案的确定······································ 25 二. 切削力和夹紧力计算······································ 25 三. 定位误差分析············································ 25 四. 夹具的结构特点及应用情况································ 28 参考文献 ······················································· 29 致 谢 ······················································· 30 摘 要 输出轴零件的主要作用是支撑零件、实现回转运动并传递转矩和动力。本文以一典型输出轴零件为例讨论了零件的机械加工工艺规程和专用夹具设计。对于工艺规程设计，在分析了输出轴零件的作用和加工工艺性后，先提出两种工艺方案，再甄选出最佳方案。输出轴零件的机械综合性能要求较高，一般选择锻件作为毛坯。对于夹具设计，本文选取其中钻斜孔工序来设计专用夹具。经过对工序要求进行分析后，采用一面两孔定位，转动压板加紧。导向装置采用可换的特殊钻套。 关键词：输出轴；工艺规程；夹具设计。 Abstract Output shaft parts is supporting parts, realize the main function of rotary motion and torque and power. In this pape