IXX 大 学课程设计课 题：下轴的工艺及夹具设计【铣 16 开口槽】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 要本设计是基于下轴零件的加工工艺规程及一些工序的专用夹具设计。下轴零件的主要加工表面是平面及槽系。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，本设计遵循先面后槽的原则。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槽系加工精度。基准选择以下轴的输入轴和输出轴的支承孔作为粗基准，以结合面与两个工艺孔作为精基准。主要加工工序安排是先以支承孔系定位加工出顶平面，再以顶平面与支承孔系定位加工出工艺孔。在后续工序中除个别工序外均用顶平面和工艺孔定位加工其他孔系与平面。夹具选用专用夹具，夹紧方式多选用气动夹紧，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：下轴类零件；工艺；夹具；全套图纸，加IIIIVABSTRACTThe 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. Therefore, 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 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 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, clamping 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: Angle gear seat parts; fixture;V目 录摘 要 IIABSTRACT III第一章 加工工艺规程设计 11.1 零件的分析11.1.1 零件的作用 11.1.2 零件的工艺分析 11.2 下轴加工的主要问题和工艺过程设计所应采取的相应措施21.2.1 孔和平面的加工顺序 21.2.2 加工方案选择 21.3 下轴加工定位基准的选择31.3.1 粗基准的选择 31.3.2 精基准的选择 31.4 下轴加工主要工序安排31.5 机械加工余量、工序尺寸及毛坯尺寸的确定51.6 确定切削用量及基本工时（机动时间）61.7 时间定额计算及生产安排15第 2 章 铣 16 开口槽夹具设计 172.1 设计要求172.2 夹具设计172.2.1 定位基准的选择 172.2.2 切削力及夹紧力的计算 172.3 定位误差的分析202.4 夹具设计及操作的简要说明21结 论