发布时间 : 星期三 文章变速器换挡拨叉的机械加工工艺及夹具设计_毕业设计论文更新完毕开始阅读b654e474b5daa58da0116c175f0e7cd184251883
毕业设计（论文）
变速器换挡叉的机械加工工艺及夹具设计
院 别 专业名称 班级学号 学生姓名 指导教师
控制工程学院 过程装备与控制工程
2013年6月13日
东北大学秦皇岛分校毕业设计（论文） 第 I 页 变速器换挡叉的机械加工工艺及夹具设计
摘 要
变速器换档叉位于主轴箱。主要作用是传递扭矩，使变速器获得换档的动力。优点是可以从一种速度直接变到另一种速度,而不需要经过中间的一系列,因此变速很方便;其缺点是比较复杂。
本课题根据调查研究所提供的数据和有关技术资料，运用机械制造技术理论等相关专业知识对变速器换挡叉零件的作用和工艺进行了分析和计算，并对该换挡叉的加工工艺以及其夹具进行了优化设计。
本论文制定了变速器换挡叉的工艺规程方案，拟定了夹具设计方案并完成了其第五工序的夹具结构设计。最后通过使用AUTOCAD绘制装配图和零部件图.
关键词：换档叉；工艺；夹具
东北大学秦皇岛分校毕业设计（论文） 第 II 页
Transmission shift fork mechanical processing technology and fixture
design
Author：Bao Lisheng
Tutor：Ma Lianjie
Abstract
The transmission shift fork is located in the spindle box. The main function is to transfer torque, power transmission gain shift. The advantages can be changed directly to another speed from a speed, without the need to go through a series of intermediate, so the transmission is very convenient; the disadvantage is the relatively complex.
This topic provides according to the investigation data and relevant technical data, application and process knowledge of mechanical manufacturing technology and other related professional theory of transmission shifting fork of the parts are analyzed and calculated, and the processing technology of the shifting fork and the jig design is optimized.
This paper developed a process scheme of transmission shift fork, the design of fixture and the fixture structure design of the fifth. Finally, by using the AUTOCAD assembly drawing and parts drawing.
Keywords: shift fork; technology; fixture
东北大学秦皇岛分校毕业设计（论文） 第 III 页
目 录
目 录 ................................................................................................................................ III 1绪论 ......................................................................................................................................... 1 1.1课题背景 ......................................................................................................................... 1 1.2变速器换挡叉、夹具、组合机床的介绍 ..................................................................... 2 1.3变速器行业概况 ............................................................................................................. 3 1.4课题的研究方法 ............................................................................................................. 3 2零件分析及毛坯的设计 ......................................................................................................... 4 2.1零件的作用 ..................................................................................................................... 4 2.2零件的工艺分析 ............................................................................................................. 4 2.3审查换挡叉的工艺性 ..................................................................................................... 5 2.4毛坯的设计 ..................................................................................................................... 6 3工艺路线的确定 ..................................................................................................................... 8 3.1基面的选择 ..................................................................................................................... 8 3.2粗基准的选择 ................................................................................................................. 8 3.3精基准的选择 ................................................................................................................. 8 3.4制定机械加工工艺路线 ................................................................................................. 8 3.5工艺路线比较 ............................................................................................................... 11 3.6选择量具 ....................................................................................................................... 12 4确定切削用量及时间定额 ................................................................................................... 13 5专用夹具的设计 ................................................................................................................... 24 5.1问题的提出 ................................................................................................................... 24 5.2夹具设计 ....................................................................................................................... 24 结 论 .................................................................................................................................. 27 致 谢 .................................................................................................................................. 28 参考文献 .................................................................................................................................. 29 附 录 .................................................................................................................................. 30