机械电子工程专业毕业论文 差速器壳体工艺规程及夹具CAD设计.doc

机械电子工程专业毕业论文--差速器壳体工艺规程及夹具CAD设计 关键词 差速器壳体;工艺规程;夹具;汽车 Abstract Machining technology design is a design that includes theoretical, scientific, operating characteristic and economic. It involved wide knowledge, decided the working quality, manufacture cost, products benefit and economic effect of one product. Thus, correct analyse the function of the parts, appropriate compile technological procedure, selected machine, tool, measuring implement, design clamp, define allowance, cutting quantity, have important meaning for improving products quality, labour productivity, reduce labour intensity etc. Reducer shell is one of more important parts in tractor .it can hold connect pass torque ,the use of the hole reducer is to circle it is suited to back and change turning direction .The content of design include two part: the first part is reducer shell technological process plan .We go on angling technology on depending on understanding the use of part and picture of partWe make a more economical technology process on the basis of obeying the laws of design process ,decide performance part by consulting form, select machine tool and so forth ,make a full pair of process card ,the second part is design of clamp ,the use of the clamp is to drill intersection holeKeywords design process;clamp;shell;plan 不要删除行尾的分节符,此行不会被打印 目 录 摘要Ⅰ Abstract..Ⅱ 第1章 绪论 1 1.1 课题背景 1 1.2 课题研究的意义 1 1.3 国内外研究现状 1 第2章 机械加工工艺规程的制订 3 2.1 制定机械加工工艺规程的步骤和内容 3 2.1.1 零件的用途 3 2.1.2 确定零件的生产类型 5 2.1.3 确定毛坯的种类和制造方法 6 2.1.4 绘制毛坯图 7 2.1.5 用Pro/E给毛坯造型 7 2.1.6 拟定工艺路线 8 2.1.7 编制工艺文件 18 2.2 加工余量和工序尺寸的确定 18 2.2.1 加工余量的概念 18 2.2.2 确定毛坯尺寸公差与加工余量 20 2.2.3 确定工序间的加工余量 20 2.2.4 工序尺寸及其公差的确定 21 2.3 切削用量和时间定额的确定 24 2.3.1 切削用量的选择 24 2.3.2 时间定额的确定 25 第3章 机床夹具设计 32 3.1 机床夹具概述 32 3.1.1 机床夹具的分类与组成 32 3.1.2 机床夹具设计方法 34 3.2 定位方案设计 37 3.2.1 工件在夹具体中的定位 37 3.2.2 定位误差的分析与计算 38 3.3 对刀和导向装置设计 38 3.3.1 对刀及导向装置设计 38 3.3.2 导向元件设计 39 3.4 夹紧装置设计 40 3.4.1 确定夹紧力的基本原则 40 3.4.2 夹紧力的作用点 40 3.4.3 夹紧力的方向 4