北华航天工业学院毕业论文
齿轮泵泵体的加工工艺与专用夹具设计
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。
泵体加工工艺规程及其铣削、钻孔的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
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北华航天工业学院毕业论文
Gear pump body process and special fixture design
Abstract
This design content has involved the machine manufacture craft and the engine bed jig design, the metal-cutting machine tool, the common difference coordination and the survey and so on the various knowledge.
Body process planning and drilling fixture was designed to include part machining process design, process design, and dedicated fixture design of three parts. In process design, analysis of the part must first understand the parts of the process re-engineering the structure of a blank, and select a good part of the processing of the base to design parts process route; followed by the various working steps on the part of the procedures for the size of the calculation, the key is to determine the various stages of work out of process equipment and cutting consumption; then dedicated fixture design, selection of design out of all the component parts fixture, such as the positioning components, clamping components, guiding elements, the specific folder connection with the machine parts and other components; calculate the positioning fixture positioning error generated, analysis fixture structure is reasonable and deficiencies, and attention to improving the design in the future.
Key words：The craft、the working procedure、the cutting specifications
clamp、the localization
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北华航天工业学院毕业论文
目录
摘要 ........................................................................................................................ Abstract .................................................................................................................. 引言 ...................................................................................................................... 第1章 绪论 ........................................................................................................ 1 1.1 机械加工工艺概述及发展趋势 ............................................................... 1
1.2 机床夹具的概述及发展趋势....................................................................1 第2章 零件的分析 ............................................................................................ 3 2.1 零件的作用及工艺分析 ........................................................................... 3 2.2 零件的生产纲领 ....................................................................................... 4 第3章 确定毛坯类型，绘制毛坯件图 ............................................................ 5 3.1 确定毛坯尺寸公差和机械加工余量 ....................................................... 5 3.2 绘制毛坯简图 ........................................................................................... 6 第4章 工艺设计.................................................................................................7 4.1 定位基准的选择 ......................................................................................... 7 4.1.1 精基准的选择 .................................................................................... 7
4.1.2 粗基准的选择 .................................................................................... 8
4.2工序的合理组合..........................................................................................9
4.3加工阶段的划分..........................................................................................9 4.4工艺路线.....................................................................................................10 4.5加工设备及工艺装备的选用.....................................................................11 4.6加工余量、尺寸公差的确.........................................................................12 4.7切削用量及时间定额的算.........................................................................13 第5章 专用夹具设计 ...................................................................................... 42
5.1定位方案及定位装置的设计计算............................................................42
5.1.1 定位方案的确定 ................................................................................ 42 5.1.2 定位误差的分析计算 ........................................................................ 42 5.2 夹紧方案的设计及装置的设计计算 ....................... 错误！未定义书签。 5..2.1 夹具方案的确定 ............................................... 错误！未定义书签。 - -