设计简介
摘 要
连杆是汽车发动机主要的传动机构之一，它将活塞与曲轴连接起来，把作用于活塞顶部的膨胀气体压力传给曲轴，使活塞的往复直线运动可逆的转化为曲轴的回转运动，以输出功率。是为发动机提供安全可靠、经久耐用、节省能源、满足功用的一个重要零件，它对开发轻型、高速、大功率的柴油机有着密切的关系。因此，连杆的合理结构设计、加工工艺性设计，保证连杆的加工质量，提高生产效率有这重要意义，它是保证柴油机产品质量的关键所在。
此说明书，对连杆零件进行了详细的分析。设计出了零件加工的工艺规程。在工艺规程中涉及到了连杆加工的加工工艺，加工设备的选择，加工余量的确定，毛坯的确定，机床、刀具的确定，夹具的设计一系列与连杆加工有紧密联系的因素。
通过对此次设计，学会对中等难度零件的工艺编制，及其特定工序的夹具设计。
关键词： 工艺；毛坯；夹具。
连杆是汽车发动机主要的传动机构之一，它将活塞与曲轴连接起来，把作用于活塞顶部的膨胀气体压力传给曲轴，使活塞的往复直线运动可逆的转化为曲轴的回转运动，以输出功率。是为发动机提供安全可靠、经久耐用、节省能源、满足功用的一个重要零件，它对开发轻型、高速、大功率的柴油机有着密切的关系。因此，连杆的合理结构设计、加工工艺性设计，保证连杆的加工质量，提高生产效率有这重要意义，它是保证柴油机产品质量的关键所在。
此说明书，对连杆零件进行了详细的分析。设计出了零件加工的工艺规程。在工艺规程中涉及到了连杆加工的加工工艺，加工设备的选择，加工余量的确定，毛坯的确定，机床、刀具的确定，夹具的设计一系列与连杆加工有紧密联系的因素。
通过对此次设计，学会对中等难度零件的工艺编制，及其特定工序的夹具设计。
关键词： 工艺；毛坯；夹具。
ABSTRACT
The connecting rod module is in the diesel engine essential movement power transmission component. It is affects the gas physical strengthand so on each kind of strength transmits on the piston gives the crank, also transforms the crank rotary motion into the piston reciprocal motion part. Is safely provides reliable, durable, the economical energy, satisfied function important components for the engine, it to develops lightly, is high speed, the high efficiency diesel engine has close relationship. Therefore, the connecting rod reasonable structural design, the processing technology capability design, guaranteed the connecting rod the processing quality, enhances the production efficiency to have this vital significance, it is guaranteed the diesel engine product quality the key is at. This instruction book let, has carried on the detailed analysis to the connecting rod components.
Designed the components processing technological process. A series of involved the processing craft in the technological process which the connecting rod processed, the processing equipment choice, the processing remainder determination,the semifinished materials determination, the engine bed, the cutting tool determination, the jig design with the connecting rod processing had the close relation the factor.
By the endtime of the densign,learn the technics weave of medium difficultry part,and the holding design of the especially working procedure.
Key words: roughcast; craft; jig
The connecting rod module is in the diesel engine essential movement power transmission component. It is affects the gas physical strengthand so on each kind of strength transmits on the piston gives the crank, also transforms the crank rotary motion into the piston reciprocal motion part. Is safely provides reliable, durable, the economical energy, satisfied function important components for the engine, it to develops lightly, is high speed, the high efficiency diesel engine has close relationship. Therefore, the connecting rod reasonable structural design, the processing technology capability design, guaranteed the connecting rod the processing quality, enhances the production efficiency to have this vital significance, it is guaranteed the diesel engine product quality the key is at. This instruction book let, has carried on the detailed analysis to the connecting rod components.
Designed the components processing technological process. A series of involved the processing craft in the technological process which the connecting rod processed, the processing equipment choice, the processing remainder determination,the semifinished materials determination, the engine bed, the cutting tool determination, the jig design with the connecting rod processing had the close relation the factor.
By the endtime of the densign,learn the technics weave of medium difficultry part,and the holding design of the especially working procedure.
Key words: roughcast; craft; jig
目 录
绪论 1
1. 零件的工艺分析 3
1.1 连杆的工作情况 3
1.2 连杆的结构特点 3
1.3 连杆机械加工的主要技术要求 3
2. 毛坯的确定 5
2.1生产类型的确定 5
2.2 材料的选择 5
2.3 毛坯种类与方法的确定 5
2.4 确定毛坯尺寸公差和加工余量 6
2.5 毛坯主要加工表面的尺寸及公差的确定 7
3. 连杆工艺规程的编制 9
3.1 定位基准的选择 9
3.2 拟订工艺路线 9
3.2.1选择表面加工方法 9
3.2.2加工阶段的划分 10
3.2.3加工工序的顺序安排 10
3.2.4机械加工余量、工序尺寸及其公差的确定 10
3.2.5加工设备与工艺装备的选择 21
4.钻孔夹具设计 25
4.1专用夹具设计方法的工艺分析 25
4.1.1专用夹具的基本要求 25
4.1.2专用夹具的设计步骤 25
4.1.3夹具的选材 25
4.1.4夹具体的热处理 25
4.1.5问题的提出 25
4.2.1工件自由度分析 26
4.3确定夹具体结构 26
4.4夹具零件及夹具的公差技术条件 26
4.5螺栓、垫圈选择 27
4.6夹具的工作原理 27
4.7切削力及夹紧力的计算 27
5部分工序的数控程序 29
5.1数控编程 29
5.11数控编程技术 29
5.12数控编程的方法 29
5.2部分工序的数控程序 29
结论 31
致谢 32
参考文献 33
文献综述 34
