机械毕业设计-座架零件加工工艺及钻φ115孔夹具设计.doc

优秀机械毕业设计欢迎下载, 学习交流加 QQ 197216396 专业机械设计解君之忧 XX 大学课程设计论文座架零件加工工艺及钻φ 115 孔夹具设计所在学院专业班级姓名学号指导老师年月日优秀机械毕业设计欢迎下载, 学习交流加 QQ 197216396 专业机械设计解君之忧 2 摘要座架零件零件加工工艺及钻床夹具设计是包括零件加工的工艺设计、工序设计以及专用夹具的设计三部分。在工艺设计中要首先对零件进行分析,了解零件的工艺再设计出毛坯的结构,并选择好零件的加工基准,设计出零件的工艺路线;接着对零件各个工步的工序进行尺寸计算,关键是决定出各个工序的工艺装备及切削用量;然后进行专用夹具的设计,选择设计出夹具的各个组成部件,如定位元件、夹紧元件、引导元件、夹具体与机床的连接部件以及其它部件;计算出夹具定位时产生的定位误差,分析夹具结构的合理性与不足之处,并在以后设计中注意改进。关键词: 工艺,工序,切削用量,夹紧,定位,误差优秀机械毕业设计欢迎下载, 学习交流加 QQ 197216396 专业机械设计解君之忧 3 目录摘要···················································································· 1 第1章绪论············································································ 3 第 2章加工工艺规程设计·························································· 4 零件的分析································································· 4 零件的作用···························································· 4 零件的工艺分析······················································ 4 座架零件加工的主要问题和工艺过程设计所应采取的相应措施 5 孔和平面的加工顺序················································ 5 孔系加工方案选择··················································· 5 座架零件加工定位基准的选择········································· 6 粗基准的选择························································· 6 精基准的选择························································· 6 座架零件加工主要工序安排············································ 6 机械加工余量、工序尺寸及毛坯尺寸的确定······················· 8 确定切削用量及基本工时(机动时间) ····························· 9 时间定额计算及生产安排············································· 16 第3章钻φ 115H7 孔夹具设计···················································· 19 研究原始质料···························································· 19 定位、夹紧方案的选择················································ 19 切削力及夹紧力的计算················································· 19 误差分析与计算························································· 20 夹具体的设计···························································· 21 夹具设计及操作的简要说明························