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课程设计-“CA6140车床拨叉”零件的机械加工工艺及工艺设备设计，共18页，6580字，附设计图纸，加工工艺过程综合卡，工序卡
一、设计题目
设计“CA6140车床拨叉”零件的机械加工工艺及工艺设备
二、原始资料
(1) 被加工零件的零件草图 1张
(2) 生产类型: 4000件/年
三、上交材料
(1) 被加工工件的零件图 1张
(2) 工件的毛坯图 1张
(3) 机械加工工艺过程卡片　 1张
(4) 与所设计夹具对应那道工序的工序卡片 1张
(5) 夹具装配图 1张
(6) 夹具体图 1张
(7) 课程设计说明书(6000～8000字) 1份

摘　要
这次设计的是CA6140车床（831009）拨叉，包括零件图、毛坯图、装配图各一张，机械加工工艺过程卡片和与工序卡片各一张。首先我们要熟悉零件和了解其作用，它位于车床变速机构中，主要起换档作用。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械加工余量。最后拟定拨差的工艺路线图，制定该工件的夹紧方案，画出夹具装配图。
就我个人而言，我希望能通过这次课程设计，了解并认识一般机器零件的生产工艺过程，巩固和加深已学过的技术基础课和专业课的知识，理论联系实际，从中锻炼自己分析问题、解决问题的能力，为今后的工作打下一个良好的基础，并且为后续课程的学习打好基础。
Abstract
This time I design the lathes of the shift forks CA6140(831009), 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, work out the fastening motion scheme being workpiece's turn , draw up clamp assembling picture.
As far as my individual be concerned, I want to knowing consolidati 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 , striking the basis for the future work and the following course’s studying.
目录
1零件的分析 1
1.1零件的作用 1
1.2零件的工艺分析 1
2工艺规程设计 1
2.1确定毛坯的制造形式 1
2.2基面的选择 2
3制定工艺路线 2
4机械加工余量、工序尺寸及毛皮尺寸的确定 4
5确立切削用量及基本工时 4
5.1加工条件 4
5.2切削用量 5
6夹具设计 12
6.1问题的提出 12
6.2卡具设计 12
参考文献 13