a0夹具装配图
柴油机汽缸盖加工工艺及夹具设计
摘要
柴油机汽缸盖从毛坯到成品的加工过程中往往涉及到加工工艺和夹具。其中加工工艺关系到汽缸盖的加工顺序、加工方法的选择，而夹具决定着最终成品质量的优劣。所以对柴油机汽缸盖加工工艺及夹具设计十分重要。
针对柴油机汽缸盖进行加工工艺及夹具设计。汽缸盖被安置在缸体上方，通过螺栓紧固于缸体上，构成封闭环境，组成燃烧室。由于体积大，且要求的精度较高。故为加工出合格的产品，就必须先设计出好的加工工艺和夹具。此外，工件结构复杂，内部为空腔，壁厚的分布不均匀，在面上的孔较多，致其加工难度大，而加工工艺也变得相对复杂。
对汽缸盖的作用、加工工艺和夹具需做较全面的分析计算及论证,并对汽缸盖毛坯、零件结构、技术要求、精度要求分析，重点在于选出合理的加工工艺及其方案。设计计算出每道加工工序的加工余量、尺寸要求和选取加工车床、刀具等设备装置。并计算出其加工工序的加工时间、切削深度、切削用量及进给量。综合上面所述数据绘制缸盖加工工艺卡片，对一些非常重要的工序需要详细说明。
而在设计缸盖的夹具方面，本次是针对汽缸盖表面的螺栓沉孔加工所设计的通用夹具。其中包含了定位元件、夹紧装置、对刀装置的设计。对定位误差分析计算，并计算其夹紧装置的刚度校核。最后，简要说明夹具的安装、使用方法，并附上相应的夹具体和夹具装配图。
关键词：汽缸盖；加工工艺；工序尺寸；夹具
ABSTRACT
Diesel engine cylinder head from rough to finished product processing often involves the processing technology and fixture. The processing technology is related to the processing sequence of the cylinder head and the choice of processing methods, and the fixture determines the quality of the final product quality. So the processing technology and fixture design of diesel engine cylinder head is very important.
Machining technology and fixture design for diesel engine cylinder head .The cylinder head which fastened to the cylinder by bolts is placed above the cylinder. They form a closed environment and make up the combustion chamber. Due to the large volume, the required accuracy is higher. Therefore, in order to process a qualified product, it is necessary to design a good processing technology and fixture. In addition, the structure and shape of the parts are complex and Internal cavity, wall thickness uneven, more holes on the surface cause that Its processing is difficult, and the processing technology has become relatively complex.
We need to do a more comprehensive analysis and demonstration for the effect cylinder head, processing technology and fixture. Cylinder head blank, parts structure, technical requirements, accuracy requirements should also be analyzed. The focus is on how to choose a reasonable processing technology and its program. Design and calculation of each processing process processing margin, size requirements and selection of processing lathes, knives and other equipment. and calculate the processing time of its processing, cutting depth, cutting the amount and feed. According to the above data drawing cylinder head processing technology card, for some very important process ,we need to elaborate.
This is the cylinder head on the surface of the bolt hole design of the universal fixture design in the design of the cylinder head of the fixture, which contains the positioning and clamping components of the design. Analysis and calculation of positioning error，it’s necessary to calculate the strength check of the clamping device. Finally, we should briefly explain the fixture installation and how to use it,and give the corresponding fixture and fixture assembly diagram.
Keywords : cylinder head ; production process ; process ; fixture
目录
摘要I
ABSTRACT II
1绪论1
2汽缸盖分析4
2.1汽缸盖的作用4
2.2汽缸盖的工艺分析4
2.3汽缸盖的主要技术要求5
2.4汽缸盖零件图的分析6
3机械加工工艺规程设计8
3.1计算生产纲领，确定生产类型8
3.2汽缸盖毛坯的确定8
3.3基准选择9
3.4汽缸盖的加工工艺方案选择9
3.5工艺路线10
3.6机械加工余量、工序尺寸及毛坯尺寸的确定12
3.7加工孔与定位孔的尺寸链计算13
3.8切削用量计算16
4夹具的设计19
4.1夹具概述19
4.2定位误差计算19
4.3夹具方案的提出20
4.4设计夹紧机构时的要求21
4.5夹具的设计21
4.6汽缸盖夹具设计装配图及夹具体零件图25
5环保分析26
6结论27
参考文献28
附录1：外文翻译30
附录2：外文原文37
致谢41
缸盖零件图
A1 夹具体
设计所包含文件
字数统计
A4 定位销
a4 菱形销
加工过程卡
A4 垫板
工序卡
