柴油机气缸体的机械加工工艺及夹具设计(开题报告,中期检查表,论文说明书13200字,CAD图10张)
摘 要：本课题是对4125型柴油机气缸体进行工艺设计和夹具的设计。对气缸体的主要加工表面、气缸体顶面、主轴承座侧面、气缸孔、主轴承孔及凸轮轴承孔等的工艺规程进行了详细的分析，填写了工艺过程卡片及工序卡片，设计了粗铣气缸体平面专用机床夹具。在对此气缸体的工艺设计中为减少箱体在加工过程中的误差，我们考虑基准的重合原则，统一原则，互为基准原则以及粗基准的选择原则，为使定位稳定夹紧可靠，要求所选用的粗基准尽可能不重复使用原则。夹具的设计，保证了零件的加工精度，同时提高了生产效率，降低了工人的劳动强度。
关键词：气缸体；机械加工工艺规程；工序卡；专用机床夹具；
Mechanical Processing Technology and Fixture Design of 4125 Diesel Engine Cylinder Block
Abstract: This topic is for 4125 diesel engine cylinder block process design and fixture design. The main processing of the cylinder block surface, the cylinder block end face, Lord side, cylinder bearing holes, the main bearing hole and CAM bearing hole and techniques procedure are analyzed in detail, and fill out the process card and process card, design the rough milling cylinder block plane special machine tool fixtures. This cylinder block in the process design to reduce the error in the process, we consider the benchmark superposition principle, unified principle, thus the principles and the benchmark crude benchmark the choosing principle, positioning for stable clamping reliable, request chooses not to repeat the benchmark crude as far as possible, use the principle.The fixture design ensure the parts processing precision, While improving production efficiency and reduce the labor intensity of the workers.
Key words: Cylinder block; Machining processes; Process card; Dedicated fixture
目 录
摘要…………………………………………………………………………………………1
关键词………………………………………………………………………………………1
1 前言………………………………………………………………………………………2
2 零件的分析………………………………………………………………………………3
2.1 零件结构分析……………………………………………………………………3
2.2 零件工艺分析……………………………………………………………………4
2.3 零件主要技术要求………………………………………………………………4
3 机械加工工艺规程设计…………………………………………………………………5
3.1 计算零件生产纲领、确定生产类型……………………………………………5
3.1.1 计算生产纲领……………………………………………………………5
3.1.2 确定生产类型、分析工艺特点…………………………………………5
3.2 毛坯及机械加工余量的确定……………………………………………………5
3.2.1 毛坯的确定………………………………………………………………5
3.2.2 铸件的机械加工余量确定………………………………………………6
3.3 气缸体的工艺规程设计…………………………………………………………7
3.3.1 定位基准的选择…………………………………………………………7
3.3.2 表面加工方法的选择……………………………………………………7
3.3.3 工艺路线的制定…………………………………………………………9
4 专用夹具的设计………………………………………………………………………23
4.1 夹具设计概述…………………………………………………………………23
4.1.1 夹具的基本组成………………………………………………………23
4.2 粗铣气缸体平面夹具的设计…………………………………………………23
4.2.1 零件本工序的加工要求分析…………………………………………23
4.2.2 夹具的类型的确定……………………………………………………24
4.2.3 拟定定位方案和选择定位元件………………………………………24
4.2.4 确定夹紧方案…………………………………………………………25
4.2.5 确定对刀装置…………………………………………………………26
4.2.6 夹紧力的分析计算……………………………………………………26
5总结………………………………………………………………………………………28
参考文献……………………………………………………………………………………29
致谢…………………………………………………………………………………………29
附录…………………………………………………………………………………………30
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