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1、I毕业设计课 题： 齿轮泵体工艺设计和钻 2-18 孔夹具设计专 题：专 业： 机 械 制 造 及 自 动 化学 生 姓 名： 班 级： 学 号：指 导 教 师：完 成 时 间： II摘 要本设计是基于齿轮泵体零件的加工工艺规程及一些工序的专用夹具设计。齿轮泵体零件的主要加工表面是端面及孔系。一般来说，保证平面的加工精度要比保证孔系的加工精度容易。因此，本设计遵循先面后孔的原则。并将孔与平面的加工明确划分成粗加工和精加工阶段以保证孔系加工精度。夹具选用专用夹具，夹紧方式多选用手动夹紧，夹紧可靠，机构可以不必自锁。因此生产效率较高。适用于大批量、流水线上加工。能够满足设计要求。关键词：齿轮泵体类
2、零件；工艺；夹具；全套图纸，加IIIABSTRACTThe design is based on the body parts of the processing order of the processes and some special fixture design. Body parts of the main plane of the surface and pore system. In general, the plane guarantee processing precision than that of holes machining precision easy. The
3、refore, this design follows the surface after the first hole principle. Plane with holes and the processing clearly divided into roughing and finishing stages of holes to ensure machining accuracy. Datum selection box input shaft and the output shaft of the supporting hole as a rough benchmark, with
4、 top with two holes as a precision technology reference. Main processes arrangements to support holes for positioning and processing the top plane, and then the top plane and the supporting hole location hole processing technology. In addition to the follow-up processes individual processes are made
5、 of the top plane and technological hole location hole and plane processing. Supported hole processing using the method of coordinate boring. The whole process of processing machine combinations were selected. Selection of special fixture fixture, clamping means more choice of pneumatic clamping, cl
6、amping reliable, institutions can not be locked, so the production efficiency is high, suitable for large batch, line processing, can meet the design requirements.Key words: parts; fixture;IV目 录摘 要 IIABSTRACT III第 1 章 绪论 11.1 机械加工工艺概述 11.2 机械加工工艺流程 11.3 夹具概述 21.4 机床夹具的功能 31.5 机床夹具的发展趋势 31.5.1 机床夹具的现状 31.5.2 现代机床夹具的发展方向 4第 2 章 加工工艺规程设计 62.1 零件的分析 62.1.1 零件的作用 62.1.2 零件的工艺分析 62.2 齿轮泵体加工的主要问题和工艺过程设计所应采取的相应措施 72.2.1 孔和平面的加工顺序 72.2.2 加工方案选择 72.3 齿轮泵体加工定位基准的选择 82.3.1 粗基准的选择 82.3.2 精基准的选择 82.4 齿轮泵体加工主要工序安排 82.5 机械加工余量、工序尺寸及毛坯尺寸的确定 112.6 选择加工设备及刀、量具 112.7 确定切削用量及基本工时（机动时间） 12第 3 章 钻 2-18 孔夹具设计
