摘要 经过本次的毕业设计，我将大学四年在课堂上所学的知识进行了一次重新梳理，成功地将理论知识转化为实际运用，并且在设计的过程中，了解了很多实际生产中会遇到的问题，在遇到这些问题的时候，自己独立分析实际情况，逐步地去解决这些问题，锻炼出了独立设计一个复杂机械零件的能力，并且也充分地掌握了夹具的设计方法和一些基本原理，与此同时，也在设计的过程中，自己查找手册和相关图标，掌握了这方面的查阅技能。68699
本次的毕业设计是要求设计出一个完整的汽车发动机活塞零件的加工工艺及装备设计，这个活塞零件的基本特点就是它是铸件，并且零件复杂，体积也比较小，零件的加工特点就是时间长，并且加工路线长，成本比较高，对它的加工精度也相对很高。由于这个零件的主要加工内容是孔和表面，而面又比孔容易加工，在编制工艺路线的时候，优先加工面，再以这个加工过的面来定位其他的加工部位。
零件的加工路线确定之后，就开始设计活塞零件的夹具设计，根据之前所设计的路线，分析在这个工艺流程之中，这个夹具所需要去限制的自由度的数量，再根据零件本身的一些特征去选择定位元件，之后再考虑这个定位元件是否限制了在加工过程中必须要限制的自由度，然后再来选择夹紧元件，分析这个是否符合夹具的要求，夹具的结构最后确定。
毕业论文关键词 活塞，专用夹具，加工工艺，设计
Processing Technology and Equipment Design of Piston Parts for Automobile Engine
Abstract: After this graduation design, I will be four years in the school of knowledge learned in a re-combing, the success of theoretical knowledge into practical use, and in the design process, to understand a lot of real production will meet To the problem, in the face of these problems, their own independent analysis of the actual situation, and gradually to solve these problems, exercise a separate design of a complex mechanical parts of the ability, and also fully grasp the fixture design methods and some basic Principle, at the same time, also in the design process, find their own manual and related icons, mastered the access skills in this regard.
The graduation design is to design a complete design of the engine engine piston parts and equipment design, the basic characteristics of the piston parts is that it is cast, and the parts are complex, the volume is relatively small, the processing characteristics of parts is a long time , And processing routes long, the cost is relatively high, its processing accuracy is relatively high. As the main processing of this part of the contents of the hole and the surface, and the surface is easier than the processing, in the preparation of the process line, the priority processing surface, and then the processing of the surface to locate the other processing sites.
After the machining path of the part is determined, the fixture design of the piston part is started. According to the route previously designed, the number of degrees of freedom required for the fixture is analyzed in this process. According to some characteristics of the part itself To select the positioning element, and then consider whether the positioning element in the processing process must limit the degree of freedom, and then select the clamping element, analyze whether this meets the requirements of fixtures, fixture structure to determine the final.
Key words： Piston, the processing craft, unit clamp, design
目录
摘要 I
Abstract II
1 绪论 1
1.1 本课题的研究意义与内容 汽车发动机的活塞零件加工工艺及装备设计和CAD图纸:http://www.751com.cn/jixie/lunwen_77319.html