831007拨叉中间铣断夹具设计【三维SW】

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。
拨叉831007加工工艺规程及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
摘要1
ABSTRCT 2
目录3
一零件分析5
1.1零件作用5
1.2零件的工艺分析5
1.3生产纲领5
1.4生产类型6
二零件毛胚形式确定7
三工艺规程设计8
3.1定位基准的选择8
3.1.1粗基准的选择8
3.1.2精基准的选择8
3.2制定加工工艺路线9
3.3选择加工设备及工艺装备10
3.4加工工序设计、工序尺寸计算11
3.5选择切削用量、确定时间定额12
四夹具设计25
4.1专用夹具的提出25
4.2定位方案的确定25
4.2.1定位分析25
4.2.2定位元件的选择26
4.3定位误差分析和计算26
4.4夹紧方案的设计27
4.4.1夹紧力方向、作用点： 27
4.4.2夹紧机构的选择： 27
4.5夹紧力计算27
4.6对刀导向装置的设计27
总结28
参考文献29

一零件分析
1.1零件作用
题目所给的零件是CA6140车床的拨叉。它位于车床变速机构中，主要起换档，使主轴回转运动按照工作者的要求工作，获得所需的速度和扭矩的作用。零件上方的φ22孔与操纵机构相连，二下方的φ55半孔则是用于与所控制齿轮所在的轴接触。通过上方的力拨动下方的齿轮变速。两件零件铸为一体，加工时分开。

A1-夹具体

A1-夹具装配图

A3-零件图

A3-毛胚图

三维文件内容