容积式压缩机阀体加工工艺及钻m18螺纹底孔夹具设计大学论文

XX大学

毕业设计(论文)

阀体工艺规程制定与夹具设计

所在学院 专 业 班 级 姓 名 学 号 指导老师

年 月 日

I

摘 要

本次设计内容涉及了机械制造工艺及机床夹具设计、金属切削机床、公差配合与测量等多方面的知识。

阀体零件的工艺规程及工装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。

II

The planning process and fixture design

Abstract

This design involves the machinery manufacturing process and fixture design, metal cutting machine tool, tolerance and measurement and other aspects of knowledge. Process planning and milling Phi body parts of the 75 convex table and drilling, tapping the 4-M8 thread fixture design process design, including the parts processing process design and fixture three. In the process of design should first of all parts for analysis, to understand the parts of the process to design blank structure, and choose the good parts machining datum, design a part of the process route; then the parts of each step of the process dimension calculation, is the key to determine the process equipment and cutting the amount of each working procedure design; then the special fixture fixture design, selection of the various components, such as the connecting part positioning element, clamping elements, guiding elements, fixture and machine tools and other components; the positioning errors calculated fixture positioning, analysis the rationality and shortcoming of the fixture structure, pay attention to improve and design in later.

Key words: Technology, process, cutting dosage, clamping, positioning

苏州科技学院天平学院本科生毕业设计（论文）

目录

第1章 绪论 ................................................................................................................................. 1

1．1引言 .................................................................................................................................. 6 1．2机械加工工艺规程的作用 .............................................................................................. 6 1．3阀体常用材料说明 .......................................................................................................... 6 1．4课题背景及发展趋势 ...................................................................................................... 7 第2章 工艺规程设计 ................................................................................................................... 8

2．1毛坯的制造形式 .............................................................................................................. 8 2．2零件分析 .......................................................................................................................... 8 2．3 基面的选择 ..................................................................................................................... 9

2.3.1 粗基准的选择原则 ............................................................................................... 9 2.3.2精基准选择的原则 ................................................................................................ 9 2．4制定工艺路线 ................................................................................................................ 10 2．5机械加工余量、工序尺寸及毛坯尺寸的确定 ............................................................ 11 2．6确定切削用量及基本工时 ............................................................................................ 13 第3章钻M18底孔孔夹具设计 ................................................................................................... 29

3.1研究原始质料 .................................................................................................................. 29 3.2定位基准的选择 .............................................................................................................. 29 3.3 切削力及夹紧力的计算 ................................................................................................. 29 3.4误差分析与计算 .............................................................................................................. 30 3.5 零、部件的设计与选用 ................................................................................................. 31

3.5.1定位销选用 .......................................................................................................... 31 3.5.3 钻套、衬套、钻模板设计与选用 ..................................................................... 32 3.6 确定夹具体结构和总体结构 ......................................................................................... 33 3.7夹具设计及操作的简要说明 .......................................................................................... 35 总 结......................................................................................................................................... 35 致 谢........................................................................................................................................... 36 参 考 文 献 ................................................................................................................................... 37

II

苏州科技学院天平学院本科生毕业设计（论文）

全套设计请加 197216396或401339828

1

百度搜索“77cn”或“免费范文网”即可找到本站免费阅读全部范文。收藏本站方便下次阅读，免费范文网，提供经典小说综合文库容积式压缩机阀体加工工艺及钻m18螺纹底孔夹具设计大学论文在线全文阅读。