摘 要
机械制造课程设计是在我们学习机械制造技术基础后进行的课程设计.通过此次设计对我们之前对所学各课程的一次深入的综合性的总复习,也是一次理论联系实际的训练,提高了我们的操作能力.
这次设计的是连杆，包括零件图、毛坯图、夹具体图、装配图各一张，机械加工工艺过程卡片和工序卡片各一张。首先我们要熟悉零件。
然后，根据零件的性质和零件图上各端面的粗糙度确定毛坯的尺寸和加工余量。最后拟定连杆的工艺路线图，制定该工件的夹紧方案，画出夹具装配图。
就我个人而言，这次课程设计是对自己未来从事的工作进行的一次适应性的训练，从中锻炼自己分析问题，解决问题的能力，为今后的工作打下良好的基础。
关键词：机械制造；课程设计；连杆；零件图；毛坯图；夹具体图；装配图
Abstract
Machinery Manufacturing Technology curriculum design is after learning Machinery Manufacturing Technology base course technology and the most basic course after the specialized, which is our graduation project before conducting the various courses of study by an in-depth comprehensive review of the total, is also a Theory with practical training, therefore, in our four years of university life occupy an important position.
This time I design the lathes of the shift forks, including that the part pursuing , the blank pursues , assembling pursues , the machine work procedure card the working procedure card every sheet .We should know the part very well and know its effect first , it is worked in the organization which is used for change the speed in a lathe, and the mainly role of the part is alter the speed.Then, we design the dimension of the blank and instrument process a margin of the part according to part character and the harshness of each face .Finally, I design the handicrafts route picture of the shift forks, As far as my individual be concerned, I want to knowing the general productive technology of machine part , consolidating and deepening the knowledge of basic course and specialized course what I have already learned , integrates theory with practice, and improve the ability to solve problems, what’s more , striking the basis for the future work and the following course’s studying .
key words: Machinery Manufacturing Technology; curriculum design; shift forks; part pursuing ； the blank pursues ,；assembling pursues
目 录
1.连杆零件的工艺性分析及生产类型确定……………… 1
1.1连杆的功用及结构特点…………………………………1
1.2汽车连杆的技术要求……………………………………1
1.3审查工艺性………………………………………………2
1.4确定连杆的生产类型……………………………………2
2.机械加工工艺规程设计………………………………2
2.1连杆的材料………………………………………………2
2.2确定机械加工余量………………………………………2
2.3确定毛坯尺寸……………………………………………3
3.拟定连杆的工艺路线………………………………………3
3.1定位基准的选择…………………………………………3
3.1.1精基准的选择…………………………………………3
3.1.2粗基准的选择…………………………………………3
3.2零件表面加工方法的选择………………………………3
3.3制定工艺路线……………………………………………4
4切削用量、时间定额的计算………………………………5
4.1切削用量的计算…………………………………………5
4.2时间定额的计算…………………………………………6
5.制定工序的专用机床夹具的设计………………………6
5.1铣连杆两端面的夹具设计………………………………6
5.2铣床夹具定位方案的确定………………………………6
5.3铣床夹具夹紧机构的确定………………………………7
5.4铣床夹具对刀装置的确定………………………………7
5.5铣床夹具结构的分析……………………………………8
5.6定位误差分析……………………………………………9
6.方案综合评价与结论……………………………………11
7.体会与展望………………………………………………12
8．参考文献…………………………………………………13
