密 级 B1002 机电信息系
学 号 系 别 题目：
某壳体零件加工工艺规程
及夹具设计
学生姓名： 指导教师：
机械设计制造及其自动化 学科专业：
学科类别：
工 学
2014年06月
毕业设计（论文）任务书
系 别 机电信息系专业 机械设计制造及其自动化 班B100201姓名 学号 1.毕业设计（论文）题目： 某壳体零件加工工艺规程及夹具设计 2.题目背景和意义：机械制造工艺对产品的质量控制起着重要作用，夹具是能够使产品按一定的技术要求准确定位和牢固夹紧的工艺装置，它的主要用于保证产品的加工质量、减轻劳动强度、辅助产品检测、展示、运输等。工件的工艺分析及夹具设计是工艺工程师必备的专业素质，本课题的目的是通过完成毕业设计，使学生掌握机械加工的流程，对培养
学生尽早成为合格工艺工程师具有重要的实践意义。 3.设计(论文)的主要内容（理工科含技术指标）：（1）查阅与本课题相关的文献资料（至少2~3篇外文）。（2）对零件图进行工艺分析，绘制零件的二维和三维图。（3）确定毛坯种类及制造方法，绘制毛坯图。（4）拟定零件的加工工艺规程，确定加工方案，选择合适的刀具，确定切削用量，定位基准和装夹方式等。（5）填写机械加工工艺过程卡片、工序卡片。（6）设计指定1-2个工序的机床夹具，有定位分析（自由度）、夹具的定位误差计算等；
（7）绘制各夹具的装配图；要求各夹具设计合理，符合工程实际；（8）撰写设计说明书。 主要技术指标：年产量5000件/年。 各零件的具体参数见所给参考图纸。 4.设计的基本要求及进度安排（含起始时间、设计地点）：1-3周 明确设计要求，查阅文献，收集相关资料，进行零件图的三维造型设计，撰写开题报告 4-6 周 完成外文翻译；进行工艺规程方案设计 7-8周 填写工艺文件，完成中期答辩 9-10周 各夹具的设计计算，定位分析，设计中存在的问题。 11-12周 绘制各夹具的三维装配图、部分零件工程
图。 13-14周 编写设计说明书，总体修改。15周：答辩 设计地点为学校
5.毕业设计（论文）的工作量要求 说明书两万字 图纸若干张
*
① 实验（时数）或实习（天数）： 设计时间15周
*
② 图纸（幅面和张数）：零件图若干张，工艺卡片一套， 夹具装配图A2 2张 ③ 其他要求：参考文献不少于15篇（其中外文不少于3篇），外文翻译3000字以上，外
文原文必须是 PDF格式。
指导教师签名： 年 月 日
学生签名： 年 月 日
系主任审批： 年 月 日
某壳体零件加工工艺规程及夹具设计
摘 要
本设计是一种壳体的工艺设计和夹具设计。该零件是一种支承和包容传动机构的壳体零件。设计中先进行零件的结构和工艺分析，确定粗基准和精基准以及零件的加工余量与毛坯的尺寸，得出零件的加工工艺过程，接着再计算各工序的切削用量以及工时。
除此之外，还设计了一套专用车床夹具和专用钻床夹具。首先确定合适的定位基准，设计夹具体，再选择定位元件、夹紧元件等部件。然后计算出定位误差、夹紧力以及切削力，分析夹具的合理性，确保夹具可以安全的工作。
关键词：壳体；工艺分析；车床夹具；钻床夹具；
I
Process Planning and Fixture Design of The Shell Parts
Abstract
This design is a process design and fixture design of the shell. This section is a shell of supporting and embracing transmission mechanism. In the design, it should first process the structural and industrial analysis of the section, and then determine the coarse benchmark, fine benchmark, machining allowance and blank size of the section to obtain the process of the parts making. After that it calculated the cutting dosages of every process and the production time.
In addition, this design involved a set of special milling fixture and a set of special drill press fixture. First, it identified the appropriate locating datum, chose clip specific. Then it chose positioning components, clamping component, and so on. It should also calculate the positioning error, clamping force, cutting force and then analyze the rationality of the fixture to ensure that the fixture can work safely.
Key Words: Shell; Process analysis; The lathe fixture; Drill jig;
II
目 录
1 绪论 ··································································································1
1.1课题的提出原因 ··················································································1 1.2课题的主要内容 ··················································································1 1.3课题的构思 ···································································································· 2 1.4本人所完成的工作量 ······················································································ 2
2 零件的工艺设计 ················································································3
2.1 零件的功用及工艺分析 ·················································································· 3 2.1.1 零件的功用 ······························································································· 3 2.1.2 零件的工艺分析 ························································································ 4 2.2 工艺规程的设计 ·················································································5 2.2.1 确定生产类型 ················································································5 2.2.2 确定毛坯制造形式 ··········································································5 2.2.3 基准的选择 ···················································································5 2.2.4 工序的合理组合 ·············································································6 2.2.5 制造工艺路线 ················································································7 2.3机械加工余量及毛坯的尺寸确定 ····························································8 2.4确定切削用量及基本工时 ·····································································9 2.4.1工序4切削用量及基本工时的确定······················································9 2.4.2工序5切削用量及基本工时的确定···················································· 10 2.4.3工序6切削用量及基本工时的确定···················································· 12 2.4.4工序7切削用量及基本工时的确定···················································· 12 2.4.5工序8切削用量及基本工时的确定···················································· 13 2.4.6工序10切削用量及基本工时的确定 ·················································· 16 2.4.7工序11切削用量及基本工时的确定 ·················································· 16 2.4.8工序12切削用量及基本工时的确定 ·················································· 16 2.4.9工序13切削用量及基本工时的确定 ·················································· 16
3 加工设备与工艺装备选择 ································································ 17
3.1选择机床 ························································································· 17 3.2选择夹具 ························································································· 17 3.3选择刀具 ························································································· 17
4 零件的夹具设计 ·············································································· 19
4.1机床夹具设计 ··················································································· 19
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