拖拉机变速箱回转钻模设计说明书课件.doc

2014届毕业设计说明书 基于三维软件变速箱回转钻模设计 院 、 部： 机械工程学院 学生姓名： 指导教师： 职称： 教授 专 业： 机械设计制造及其自动化 班 级： 完成时间： 摘 机械制造业是国民经济的支柱产业,关系到一个国家的综合国力。现代制造业已发生了巨大的变化,特别是由于中国有着巨大的市场潜力和劳动力资源,我国正日益成为全世界机械制造业的中心。随着经济全球化和金融危机的影响,与发达国家相比,我国机械制造业已处于很落后的局面,正陷入难以可持续发展的困境。机械发展的大方向依然是科技智能化；在人类生存环境日益突出的今天,就整个工程机械产业而言，节能减排，清洁能源是当今行业发展的主旋律；因地制宜、人性化因素、量身定制也是工程机械发展的一个趋势。这次毕业设计就是选择了这样一个课题——对拖拉机的变速箱箱体加工工艺和其中回钻钻模工序的夹具设计进行研究。在机加工工艺编制方面，主要通过仔细分析产品零件图和相关技术要求，查阅箱体类零件相关资料，结合暑假实习经历等等，考虑了的工艺结构要求、批量要求、经济性、可行性等多方面因素，最终安排了18个工序来完成变速箱体的加工，其中包括各道工序的加工方法，机床、刀具、夹具、辅具、量具的选择，基准面的选取，定位和夹紧方案的拟定。另外，在夹具设计方面，主要就回转钻模这个工序进行了夹具方案的分析，计算和最终敲定。 关键字：变速箱；回转钻模；工序卡 ABSTRACT The mechanical manufacturing is a pillar industry of the national economy, which is related to a countrys comprehensive national strength. Modern manufacturing industry has undergone tremendous changes. Whatsimportant ,because China has a huge market and the labor force resources, China is increasingly becoming the worlds machinery manufacturing center. With the globalization of economy and financial crisis, compared with the developed countries, nowadays Chinas mechanical manufacture is in a very backward situation and in difficulty sustainable development dilemma. The development of mechanical industry is still wrong intelligent science and technology；In the human survival environment problem increasingly prominent today, in terms of the whole construction machinery industry, energy conservation and emissions reduction, clean energy is the main melody of the development of industry today；Adjust measures to local conditions, human factors, customised is also a tendency for the development of construction machinery industry. This graduation design is to choose such a topic, and gear-box processing technology of tractor, and the back drill jig process of fixture design study. In machining process of preparation, mainly through careful analysis of the produc