方形件加工工艺规程及钻4-φ3孔夹具设计

00零件尺寸

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。
方形件加工工艺规程及其工装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、误差。

ABSTRCT
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.
The reduction gear box body components technological process and its the processing hole jig design is includes the components processing the technological design, the working procedure design as well as the unit clamp design three parts. Must first carry on the analysis in the technological design to the components, understood the components the craft redesigns the semi finished materials the structure, and chooses the good components the processing datum, designs the components the craft route; After that is carrying on the size computation to a components each labor step of working procedure, the key is decides each working procedure the craft equipment and the cutting specifications; Then carries on the unit clamp the design, the choice designs the jig each composition part, like locates the part, clamps the part, guides the part, to clamp concrete and the engine bed connection part as well as other parts; Position error which calculates the jig locates when produces, analyzes the jig structure the rationality and the deficiency, and will design in later pays attention to the improvement.
Keywords: The craft, the working procedure, the cutting specifications, clamp, the localization, the error

目录
ABSTRCT 3
序言1
一.机床夹具介绍2
1 .1夹具的现状及生产对其提出新的要求2
1.2现代夹具的发展方向3
二.零件的分析5
2.1零件的作用5
2.2零件的工艺分析5
三.毛坯的确定8
3.1确定毛坯的制造形式8
3.2毛坯形状及尺寸9
四拟定加工工艺路线10
4.1基准的选择10
4.1.1粗基准选择10
4.1.2精基准的选择11
4.2制定工艺路线12
五零件加工工序设计14
5.1铸造14
5.2时效处理14
5.3铣削上端面14
5.4钻4-Φ3 15
5.5铣削下端面16
六机床夹具的定位及夹紧18
6.1概述18
6.1.1机床夹具的概念18
6.1.2机床夹具的组成18
6.1.3机床夹具的分类19
6.1.4机床夹具在机械加工中的作用21
6.2工件的装夹方式22
6.3基准及其分类23
6.4工件的定位25
6.4.1工件定位的基本原理25
6.4.2常见定位方式及定位元件26
6.5工件的夹紧27
6.5.1夹紧装置的组成及基本要求27
6.5.2夹紧力的确定28
6.5.3典型夹紧结构29
6.5.4定心夹紧机构29
6.6专用夹具设计30
6.6.1对机床专用夹具的基本要求30
6.6.2专用夹具设计方法和步骤30
6.6.3夹具总图技术要求的制订31
七夹具设计33
7.1问题的提出33
7.2定位基准的选择33
7.3切削力及夹紧力计算34
7.4定位误差分析35
7.5夹具设计及操作简要说明36
总结37
致谢39
参考文献40

夹具装配图

夹具体

工序卡