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现代机械制造技术已得到越来越广泛的应用,我国的机械制造技术水平与发达国家相比还有一定差距,21世纪机械制造技术的发展方向可用“三化”来概括,即全球化、虚拟化和绿色化。现在机械加工行业发生着结构性变化，工艺工装的设计与改良已成为企业生存和发展的必要条件，工艺工装的设计与改良直接影响加工产品的质量与性能。
本文首先介绍了气门摇臂轴支座的作用和工艺分析，其次确定毛坯尺寸，然后进行了工艺规程设计，最后进行夹具设计。此次设计是对气门摇臂轴支座的加工工艺和夹具设计，其零件为铸件，具有体积小，零件结构简单的特点，由于面比孔易加工，在制定工艺规程时，就先加工面，再以面为基准来加工其它，其中各工序夹具都采用专用夹具，其机构设计简单，方便且能满足要求。
关键词：气门摇臂轴支座；工艺分析；工艺规程设计；夹具设计
The modern machinery manufacturing technology has been increasingly and widely used.The machinery manufacturing technology level of our country has a certain disparity with that of the developed country.The direction of manufacturing industry development in the 21st century may use "three" to summarize,namely:globalization,virtualization and greenization.Machining industry is now taking place in structural changes, process design and improvement of equipment has become the necessary conditions of the enterprise survival and development, process equipment design and improved products directly affect the quality and performance.
This article introduces the role and process analysis of the valve rocker arm bearing support,followed by determining blank size, and then proceed to order the design process, the final fixture design. What will be disgned is The machining process and fixture design of the Valve Rocker Arm Bearing support,which has the chatacteristics of three abstrcat.its components for castings, with a small size, simple structure and the characteristics of parts,because the surface is easier than the easy processing, point of order in the development process, the surface on the first processing , and then to surface as a benchmark to other processing, including the processes used special fixture, and its design is simple, convenient and can meet the requirements.
Key Words：valve rocker arm bearing support; process analysis;Process design; fixture design
4.2.4夹紧力的方向的确定以及计算和夹紧机构、夹紧元件的选择 49
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