文档介绍：摘 要
此次设计内容包含了机械制造工艺及机床夹具设计、金属切削机床、公差合
和测量等多方面知识。
阀体零件加工工艺及钻4×M12螺纹底孔钻床夹具设计是包含零件加工工艺设计、工序设计和专用夹具设计三部分。在工艺设计中要首先对零件进行分析，了解零件工艺再设计出毛坯结构，并选择好零件加工基准，设计出零件工艺路线；接着对零件各个工步工序进行尺寸计算，关键是决定出各个工序工艺装备及切削用量；然后进行专用夹具设计，选择设计出夹具各个组成部件，如定位元件、夹紧元件、引导元件、夹具体和机床连接部件和其它部件；计算出夹具定位时产生定位误差，分析夹具结构合理性和不足之处，并在以后设计中注意改善。
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 ￠ 140 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
毕业设计任务书
I、毕业设计(论文)题目：
阀体零件加工工艺及钻4×M12螺纹底孔钻床夹具设计
II、毕 业设计使用原始资料及设计技术要求
（1）阀体零件工作图，附图见后一页
（2）完成该零件机械加工工艺设计
（3）完成指定工序专用夹具设计（指定钻4×M12-7H螺孔底孔钻削钻床夹具设计）
（4）生产类型：大批量生产
（5）生产车间条件：