汽车发动机活塞零件的工艺装备设计
基于活塞特有的机械加工工艺特点，单靠一般的通用机床很难满足活塞的高精度要求，因此专用的设备及工艺装备在活塞切削加工中使用广泛。其功能和精度也直接影响了最终产品关键的质量指标。本论文主要是针对活塞加工的工艺规程及加工中所使用的典型专用夹具、刀具的设计进行详细说明。根据活塞工作条件、结构特点以及技术要求等因素，编制了两套工艺方案，择优制定了活塞加工的工艺规程，并设计了两套关键工序中 专用设备所使用的专用夹具以及专用的刀具各一套。
毕业论文关键词 ： 活塞；工艺；夹具；刀具
Process equipment design of automobile engine piston parts
Abstract：Piston is a main section of automotive engine, which endure cross-changing mechanical load and heat load. It is also one of the key parts which have the worst working environment in the engine. Piston need to have well nature of heat-resistant, wearable, oriented and airproof along with the whole auto required more and stricter about the engine’s charter of momentum,economy and reliability. the quality of processing are so important for satisfied the parts function.
Based on the technologic characters of mechanical working which belong to piston, it is difficult to satisfy the high precision demand of piston only relaying on a general common machine tool. So the special equipment and technological outfit are extensive use in piston cutting processing.The quality of the final products is also directly influenced by function and accuracy. This paper is primary aimed at technological procedure of the piston and give a detail illustration about typical special fixture, cutter in processing. According to piston working condition, structural trait, technological request and some factors, people weave two technological proposals. The better proposal will selected to make technological procedure of the piston, and design a special fixture, a special cutter and respectively in processing of special equipment in two key procedures.
Key words： piston; technology; fixture; cutter
目录
1 绪论 1
1.1 本课题的意义、目的 1
1.2 本课题在国内外的发展概况及存在的问题 1
1.3 本课题的指导思想及要达到的技术要求 2
1.4 本课题应解决的主要问题 2
2、活塞的分析 3
2.1 活塞的作用 3
2.2 活塞的工艺分析 3
2.3 活塞的结构特点 3
3 活塞工艺规程的设计 4
3.1 毛坯材料及制造方法的选择 4
3.2 定位基准的选择 6
3.3 活塞的主要加工表面及技术要求 7
3.4 加工方法的确定 7
3.5 拟定工艺路线 9
3.5.1 工序的安排 9
3.5.2 工艺方案的比较与技术经济分析 10
3.6 加工余量的确定 10
3.6.1 加工余量的确定方法 10
3.6.2 加工余量的确定 11
3.7 确定切削用量及基本工时(重点工序) 11
3.7.1 加工条件 11
3.7.2 计算切削用量 12
3.7.3 基本工时 12
3.8 工序尺寸与公差的确定 13