拨叉φ25孔钻削专机设计+CAD图纸
关键词： 拨叉；加工工艺；专用夹具；液压；专用机床
Fork the Ø25 drilling plane design
Abstract： Fork in the design is a mass production, according to the characteristics of the fork processing technology, In accordance with the principles of the six-point positioning, design drilling fork Ø25 holes in dedicated fixtures, calculate the clamping force, analyze the positioning error; Determine the cutting parameters and in accordance with the requirements of the work piece material, processing, calculate the cutting power and design the specific machine which meet the processing requirements. The purpose of this design is to ensure that the quantity and quality of the parts and achieve the requirements of the drawings faster and more convenient in order to improve production efficiency. By the analysis of the fork parts diagram, structure, error, accuracy requirements, To develop a process and design process fixture ,which can play a role in the actual production. We apply the hydraulic system which is used more extensively in reality to provide a more stable clamping force and make the work easier and better.
Keywords: fork；processing technology；the dedicated fixture；hydraulic；the specific machine
目 录
1 绪论 1
2 拨叉的加工工艺规程设计 1
2.1 零件的分析 1
2.1.1 零件的作用 1
2.1.2 零件的工艺分析 1
2.2确定毛坯 2
2.3 拨叉工艺规程设计 4
2.3.1 拨叉加工主要工序安排 4
2.3.2切削用量、机床校核、工时计算 5
3 拨叉φ25孔钻削专用夹具设计 18
3.1拨叉φ25孔钻削专用夹具设计要求与方案 19
3.2定位基准的选择 19
3.3夹具定位误差分析 20
3.4夹紧力及夹紧装置的确定 20
3.4.1钻削力与夹紧力的计算 20
3.4.2夹紧元件及动力装置确定 22
3.5钻模板设计 22
3.6夹具体设计 23
3.7夹具设计及操作的简要说明 23
3.8液压系统 25
4 组合机床的总体设计 27
4.1 确定组合机床的配置形式和结构方案 27
4.2 主轴箱的设计 28
4.2.1 机床联系尺寸图 28
4.2.2主轴箱的传动设计 31
4.2.3 传动零件的校核 32
4.3 确定机械重块平衡机构 36
4.4 液压系统 38
4.4.1 Z轴液压泵的确定 38
4.4.2 Y轴液压动力的确定 39
4.4.3 拟定液压系统图 40
结束语 42
参考文献 43
致谢 44
附录Ⅰ 45
1 绪论
拨叉位于车床变速机构中，主要起换挡，使主轴回转运动按照工作者的要求工作，获得所需的速度和扭矩的作用。