ca6140机床后托架加工工艺编制及夹具设计大学毕设论文.doc

本科毕业设计 CA6140车床后托架 加工工艺及夹具设计 学生姓名： 齐峰 学生学号： 080514020510 院 （系）： 机械工程学院 年级专业： 机械设计制造及自动化 指导教师： 芦玉梅 二〇一二年六 摘 要 关键词: 工艺规程；刀具；夹具 Abstract The machining process is a regulation products or parts machining process and operation method, is guiding the production of important technical documents. It directly related to the quality of the products, productivity and its processing products economic benefits, the size of the production, process of level and process problems to solve all the methods and means of the machining technology to manifest, so the stand or fall of the procedure for the quality of its products is the important guarantee of the important basis. Compiling process should ensure that its rationality, scientific and perfect sex. And machine tool is to ensure that the product of the fixture the quality at the same time improve the production efficiency, improve the labor intensity, reduce production cost and in the machine tool used to clamping work-piece, a device, and its function is to make the work relative to the machine or knife has a correct position, and in the machining process keep this position unchanged. Their research of mechanical industry has a very important significance in mass production, therefore, often use special jig. Keywords: Procedure; Cutting tool ; Fixture 目 录 摘 要 I Abstract II 第1章 绪论 1 1.1 机械加工工艺规程 1 1.2 工艺规程制订的原则 1 1.3 制订工艺规程时的原始资料 2 1.4 制订工艺规程的步骤 2 1.5 工艺文件格式 3 1.5.1 机械加工工艺过程卡 3 1.5.2 机械加工工艺卡片 3 1.5.3 机械加工工序卡片 3 1.6 夹具设计的基本要求 4 第2章 CA6140机床后托架加工工艺编制 5 2.1 CA6140机床后托架的工艺性分析及毛坯的选择 5 2.1.1 CA6140机床后托架结构的工艺性 5 2.1.2 CA6140机床后托架的技术要求 5 2.1.3 CA6140机床后托架毛坯的选择 6 2.2 加工工艺过程的设计 6 2.2.1 工艺过程的组成 6 2.2.2 定位基准的选择 7 2.2.3 加工阶段的划分 8 2.2.4 各表面加工方案的确定 10 2.2.5 工序的集中与分散 11 2.2.6 加工工艺路线方案的比较 12 2.3 加工的工序设计 14 2.3.1 毛坯的结构工艺要求 14 2.3.2 加工余量及工序尺寸的确定 14 2.3.3 机床和工艺装备的选择 17 2.3.4 确定切削用量及基本工时 18 2.4 时间定额计算及生产安排 32 2.4.1 粗、精铣底面 32 2.4.2 镗侧面三杠孔 32 2.4.3 钻顶面四孔 33 第3章 专用夹具设计 35 3.1 铣平面