泵壳体零件加工工艺及夹具设计说明书

湖南科技大学

毕业设计（论文）

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指导教师

二〇一年月日

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，目的是通过完成此次毕业设计，熟练掌握机械加工的流程，为成为合格工艺工程师打下坚实基础。

泵壳体零件的工艺规程及其铣顶面的工装夹具设计及钻孔夹具的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。通过对零件进行分析设计了两条工艺路线，通过分析比较选择了一个更加合理的方案；设计出毛坯的结构和零件的加工基准，计算各个工部的工序进行尺寸并且决定出各个工序的工艺装备及切削用量；设计了铣刀夹具和钻孔两套夹具。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。

关键字：壳体；定位误差；专用夹具；工艺规程

Abstract

The design of a wide range of knowledge covering manufacturing engineering and machine tool fixture design, metal-cutting machine tools, tolerance and measurement, etc. The purpose is to graduate by completing the design, mastering machining processes, to become a qualified process engineers laid a solid foundation. Technical rules and milling fixture top surface of the pump casing parts of the design include parts machining process design, process design, and special fixture design three parts. Through the analysis and design of the two parts of the process route, through the analysis and comparison of selecting a more reasonable option; design and processing benchmark rough structure and components, were calculated for each step of Industry and determine the size of each step of the process equipment and cutting; milling fixture design and drilling two fixtures. In the process design to first analyze the parts to understand parts of the process re-design of the rough structure, and select the machining datum good parts, design parts of the process line; then the part of each step of the process to calculate the size of a key It is to determine the technical equipment and cutting each step; then dedicated fixture design, select the design of the individual components of the fixture, such as positioning elements, clamping elements, guide elements, clamp connecting the machine parts and other components; positioning errors in the calculation of the fixture, analyze rationality and shortcomings fixture structure and design of attention to the improvement in the future.

Key Words: Case; Positioning error; Special fixture; Process planning

目录

第一章绪论 ................................................. - 1 -

1.1 选题背景和意义.......................................... - 1 -

1.1.1 选题的背景......................................... - 1 -

1.1.2 选题的意义......................................... - 1 -

1.2 夹具设计发展概况........................................ - 1 -

1.2.1 国内夹具发展史..................................... - 1 -

1.2.2 国外夹具发展史..................................... - 2 -

1.2.3 国内外机床夹具发展现状............................. - 2 -

1.2.4 机床夹具的发展方向................................. - 2 -

1.3 本文主要研究工作........................................ - 4 - 第二章零件的分析 .......................................... - 5 -

2.1 零件的作用.............................................. - 5 -

2.2 零件的工艺分析.......................................... - 5 -

2.3 泵壳零件加工的主要问题与工艺过程设计所应采取的相应措施.. - 6 -

2.4泵壳体的材料、毛坯以及热处理............................. - 7 -

2.4.1毛坯种类的确定..................................... - 7 -

2.4.2 毛坯的形状及尺寸的确定............................. - 7 -

2.4.3 毛坯材料的热处理................................... - 8 - 第三章工艺规程的设计...................................... - 9 -

3.1 确定毛坯的制造形式...................................... - 9 -

3.2 基面的选择.............................................. - 9 -

3.3 制定工艺路线............................................ - 9 -

3.3.1 工艺路线方案一.................................... - 10 -

3.3.2 工艺路线方案二.................................... - 11 -

3.4 各工序加工设备、刀具、量具选用以及机械加工余量的确定... - 11 -

3.5确定切削用量以及基本工时................................ - 13 - 第四章铣床专用夹具的设计................................ - 28 - 图

4.2 夹具底座.................................. 错误!未定义书签。

4.1 专用夹具设计的基本要求...................... 错误!未定义书签。

4.2 定位基准的选择.............................. 错误!未定义书签。