2.4.3 制定工艺方案应注意的其它问题 ...............................................................................5
2.5 工艺规程的设计...................................................................................................................5
2.5.1 确定毛坯材料及尺寸 ...................................................................................................5
2.5.2 定位基准的选择 ...........................................................................................................5
2.5.3 制定工艺路线 ...............................................................................................................6
2.6 工序尺寸的基本要求...........................................................................................................7
2.7 确定切削用量和基本工时..................................................................................................8
2.8 切削用量的选择依据........................................................................................................22
2.8.1 铣削 .............................................................................................................................22
2.8.2 钻孔 .............................................................................................................................22
2.8.3 扩孔和铰孔 .................................................................................................................23
2.8.机床精度及机床参数 ....................................................................................................23
2.9 各种加工工艺和加工方法................................................................................................24
2.9.1 平面加工工艺 .............................................................................................................24
2.9.3 螺纹加工工艺 .............................................................................................................24
2.10 常用工艺主要工序能达到的精度和表面粗糙度...........................................................24
2.10.1 平面加工 ...................................................................................................................24
2.10.2 螺纹孔加工 ...............................................................................................................25
3 专用夹具的设计 .......................................................................................................................26
3.1 对铣床夹具体的要求........................................................................................................26
3.2 夹具体的毛坯结构............................................................................................................26
3.3 夹具元件的选择与设计 ....................................................................................................26
3.4 专用夹具的设计步骤........................................................................................................27
3.5 绘制夹具总装配图............................................................................................................27
3.6 标注夹具总装配图上个部分尺寸和技术要求。............................................................28
3.7 夹具公差配合的制订........................................................................................................28
3.7.1 制订夹具公差与技术条件的依据 ............................................................................28
3.7.2 制定夹具公差和技术条件的基本原则 ....................................................................28
3.8 夹具公差的制订.................................................................................................................29
3.9 夹具技术条件的制订........................................................................................................29
3.10 夹具设计部分的计算.......................................................................................................29
3.10.1 基准的选择 ...............................................................................................................29
3.10.2 切削夹紧力的计算 ...................................................................................................29
3.10.3 定位误差的分析 .......................................................................................................30
4 零件编码系统 ...........................................................................................................................33
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