目 录
1 绪 论................................................................................................................................................................1
1.1 研究背景..................................................................................................................................................1
1.2 研究意义..................................................................................................................................................2
1.3CAD/CAM 软件介绍 ...............................................................................................................................2
1.4 研究内容..................................................................................................................................................2
2 变速箱箱体加工工艺分析................................................................................................................................3
2.1 变速箱箱体的作用..................................................................................................................................3
2.2 零件工艺分析..........................................................................................................................................3
2.3 加工定位基准的选择..............................................................................................................................3
2.4 加工工序路线的规划..............................................................................................................................4
2.5 孔系的加工..............................................................................................................................................5
3 数控加工工艺分析............................................................................................................................................5
3.1 数控加工概述..........................................................................................................................................5
3.2 数控加工工艺加工阶段的划分..............................................................................................................6
3.3 工序划分的原则......................................................................................................................................7
3.4 工序划分的方法......................................................................................................................................7
3.4.1 工序集中的划分原则..................................................................................................................7
3.4.2 机械加工工序顺序的安排原则..................................................................................................8
3.5 粗基准的选择..........................................................................................................................................8
3.6 精基准的选择..........................................................................................................................................8
3.7 切削用量的选取一般步骤......................................................................................................................9
4 变速箱箱体加工工艺设计................................................................................................................................9
4.1 变速箱箱体主要加工工序安排..............................................................................................................9
4.2 机械加工余量、工序尺寸及毛坯........................................................................................................10
4.3 切削用量的确定....................................................................................................................................12
4.3.1 粗、精铣顶面............................................................................................................................12
4.3.2 铣平面........................................................................................................................................13
4.3.3 铣槽............................................................................................................................................14
4.3.4 铣小平面....................................................................................................................................15
4.3.5 铣斜面........................................................................................................................................15
4.3.6 钻孔............................................................................................................................................16
4.3.7 绞孔............................................................................................................................................18
4.3.8 攻丝............................................................................................................................................19
4.3.9 镗孔............................................................................................................................................20
5 变速箱箱体三维建模及仿真加工..................................................................................................................22
5.1 变速器箱体三维建模............................................................................................................................22
5.2 数控加工................................................................................................................................................25
5.2.1 毛坯的创建.................................................................................................................................25
5.2.2 平面加工.....................................................................................................................................27
5.2.3 孔加工.........................................................................................................................................34
总 结....................................................................................................................................................................35
参考文献..............................................................................................................................................................40
致 谢..................................................................................................................................................................41
