设计简介
摘 要
本课题主要是在变速箱箱底零件加工过程的基础上进行的专用夹具设计。主要加工部位是平面和孔。在一般情况下，确保比保证精密加工孔很容易。因此，设计遵循的原则是先加工面后加工孔。孔加工平面分明显的阶段性保证粗加工和加工精度加工孔。通过底面作一个良好的基础过程的基础。主要的流程安排是支持在定位孔过程第一个，然后进行平面和孔定位技术支持上加工孔。在随后的步骤中，除了被定位在平面和孔的加工工艺及其他孔过程。整个过程是一个组合的选择工具。专用夹具夹具的选择，有自锁机构，因此，对于大批量，设计夹具会产生更高的生产力，提高生产效率，满足设计要求。
关键词：变速箱箱底类零件；工艺；夹具；ABSTRACT
Foundation design of body parts processing process the design of special fixture. The main processing parts processing plane and holes. In general, ensure easy to guarantee precision machining holes than. Therefore, the design principle is first machined surface after machining hole surface. Periodic hole machining plane is obvious that rough machining and machining precision machining hole. A good foundation on the bottom surface of the process. The main process is supported in the positioning hole process first, and then the processing hole plane and the hole positioning technology support. In a subsequent step, in addition to processing technology are positioned in the plane and the other hole hole and separate process. The whole process is a combination of the selection tool. Special fixture fixture selection, a self-locking mechanism, therefore, for large quantities, higher productivity, meet the design requirements.
Keywords: box type parts; technology; fixture;
Keywords: box type parts; technology; fixture;
摘 要······································································································ II
ABSTRACT································································································ I
第1章 绪 论·························································································· 4
1.1定位装置························································································· 4
1.2夹紧装置························································································· 4
1.3对刀－引导装置··············································································· 4
1.4其他元件及装置··············································································· 4
1.5夹具体···························································································· 4
第2章 加工工艺规程设计············································································ 6
2.1 零件的分析····················································································· 6
2.1.1 零件的作用·················································································· 6
2.1.2 零件的工艺分析············································································ 6
2.2 变速箱箱底加工措施········································································ 7
2.2.1 孔和平面的加工顺序······································································ 7
2.2.2 孔系加工方案选择········································································· 7
2.3 变速箱箱底加工定位基准的选择························································ 8
2.3.1 粗基准的选择··············································································· 8
2.3.2 精基准的选择··············································································· 8
2.4 变速箱箱底加工主要工序安排··························································· 9
2.5 机械加工余量、工序及毛坯的确定··················································· 11
2.6确定切削用量及基本工时（机动时间）·············································· 12
2.7 时间定额计算及生产安排································································ 21
第3章 铣左右侧面夹具设计······································································ 26
3.1 机床夹具的作用及其分类································································ 26
3.2 机床夹具的组成············································································· 28
3.3 机床夹具的多工位加工··································································· 28
3.4 定位基准的选择············································································· 29
3.5 切削力及夹紧力的计算··································································· 29
3.6 定位误差的分析············································································· 33
3.7 确定夹具体结构和总体结构··························································· 34
3.8 夹具设计及操作的简要说明··························································· 35
总结········································································································· 37
参考文献·································································································· 38
致谢········································································································· 40
