典型轴上钻孔、铣槽夹具设计夹具设计说明书.doc

摘 要  本设计是基于典型轴零件的加工工艺规程及一些工序的专用夹具设计。典型轴零件 的主要加工表面是平面及孔系。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。基准选择以典型轴的输入轴和输出轴的支承孔作为粗 基准，以顶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。支承孔系的加工采用的是坐标法镗孔。整个加 工过程均选用组合机床。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：典型轴类零件；工艺；夹具；  Abstract  This design is the special fixture for machining process of forked plectrum parts and process design based on. The main processing surface fork parts of the plane and a series of hole. In general, ensure the machining accuracy of plane than to ensure machining accuracy hole easily. Therefore, the design follows the surface after the first hole of the principle. And the hole and the plane processing clearly divided into roughing and finishing stages of processing to ensure the accuracy of the hole. The supporting hole of the input shaft and the output shaft of the benchmark by a shifting fork as a rough benchmark, the top two holes as a precision technology base. Main processing process arrangement is to support hole positioning processing the top plane, and then the top plane and the series of supporting hole location hole processing technology. In addition to the follow-up processes individual processes are used in the top plane positioning technology and other processing Kong and plane. The supporting hole processing system using the method of coordinate boring. The whole process selection of combined machine tool. The special fixture fixture, clamping means more choice of pneumatic clamping, clamping reliable, agencies can not self-locking, therefore the production efficiency is higher, suitable for high-volume, line processing, can meet the design requirements.  Key Words: A typical shaft parts; technology; fixture;  III  目 录  摘 要........................................................................................................................................II