机械毕业设计-100龙下方箱加工工艺及铣端面夹具设计.doc

优秀机械毕业设计欢迎下载, 学****交流加 QQ 197216396 专业机械设计解君之忧四川职业技术学院 Sichuan Vocational and Technical College 毕业设计(论文) 题目 100 龙下方箱零件的机械加工工艺及工装设计所属部机械工程系所属专业机械设计与制造所属班级学号学生姓名指导教师起讫日期 — 四川职业技术学院教务处制优秀机械毕业设计欢迎下载, 学****交流加 QQ 197216396 专业机械设计解君之忧摘要本设计是基于 100 龙下方箱零件的加工工艺规程及一些工序的专用夹具设计。100 龙下方箱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 100 龙下方箱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: 100 龙下方箱类零件;工艺;夹具; 优秀机械毕业设计欢迎下载, 学****交流加 QQ 197216396 专业机械设计解君之忧 ABSTRACT The 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 asa rough benchmark, with top with two holes asa 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 binations 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.