摘要：夹具是机械加工不可缺少的部件，在机床技术向高速、高效、精密、复合、智能、环保方向发展的带动下，夹具技术正朝着高精、高效、模块、组合、通用、经济方向发展。
随着机械行业的发展，专用夹具越来越受到人们的重视。专专用夹具的主要特点是装夹方便，定位准确，这些都与现代化大批量生产相适应，成为现代机械制造行业发展方向。
本课题汽车座椅销轴夹紧装置设计是指完成对汽车座椅上的销轴固定定位的一个装置。按照汽车座椅销轴夹紧装置的精度要求以及工艺流程，比较和讨论不同方案的选择所涉及的加工精度及工艺原理。由方案一以及方案二比较，从两种方案的设计方法在实际操作方面的合理性以及实行性出发选择方案二的设计，由此解决了方案一所带来的夹具偏差。在本文中，首先介绍了研究此设计的目的及意义，接着介绍了国内现状和发展趋势，紧接着介绍了现代夹具的种类及要求，最后是此设计的计算内容，其中包括弹簧的设计选择、气缸的参数选择、销轴的校核等等。
关键词：夹具;弹簧;气缸；3811
Car seat pin clamping apparatus design
Abstract：Machining clamp is an indispensable component in machine tool technology, high speed, high efficiency, precision, to complex, intelligence, environmental protection direction drive, fixture technology is towards to high precision, high efficiency, module, combination, general, economic development.With the development of machinery industry, special fixture is valued by people more and more. Special special fixture is characterized by convenient clamping, positioning accuracy, and the modern mass production to adapt, becomes the modern machinery manufacturing industry development direction.The car seat pin clamping apparatus design refers to the completion of the automobile seat pin fixed location of a device. In accordance with the car seat pin shaft clamping device accuracy requirements and process flow, compare and discuss the different options to the accuracy of processing and technology principle. The scheme and scheme comparison of two, from the two kinds of design methods in the practical aspects of rationality and practice starting options two design, thereby addressing scheme brings fixture deviation. In this paper, first introduced the research purpose and significance of this design, and then introduces the present situation and trends, followed by introduction of modern fixture types and requirements, finally this design calculation content, including the spring design, parameter selection, selection of cylinder pin check etc..
KeyWords：Fixture; Spring; Cylinder
目录
2013届本科生毕业设计（论文） 0
1绪论 4
1.1 研究夹具的目的和意义 4
1.1.1保证加工质量 4
1.1.2提高生产效率，降低生产成本 4
1.1.3扩大机床工艺范围 4
1.1.4减轻工人劳动强度，保证安全生产 4
1.2 研究课题的国内外现状和发展趋势 5
1.2.1功能柔性化 5
1.2.2结构标准化、模块化 5
1.2.2精密化 5
1.2.2高效、自动化 5
1.3 主要研究内容、需要解决的关键问题和思路 5
1.3.1 夹具的设计： 5
1.3.2 夹紧装置要求 6
1.3.3 常用的夹紧装置 7
1.3.4防止或减少变形的方案 12
1.3.5 双齿轮结构和单轴结构的比较 14
1.3.6 弹簧的设计 15
2设计过程 20
2.1齿轮的计算 20 汽车座椅销轴夹紧装置设计+CAD图纸:http://www.youerw.com/jixie/lunwen_272.html