75拖拉机变速箱壳体机械加工工艺规程设计_本科毕业设计（论文）（可编辑）.docVIP

75拖拉机变速箱壳体机械加工工艺规程设计_本科毕业设计（论文） 本科毕业设计论文 题 目 75拖拉机变速箱壳体机械加工工艺规程设计 姓 名 XXXXXX 班 级 机械设计制造及其自动化本科二班 院 系 机械工程学院 郑州科技学院机械工程系 二○一三年五月二十日 75拖拉机变速箱壳体工艺规程设计 摘 要 机械制造业是一个国家技术进步和社会发展的支柱产业之一无论是传统产业还是新兴产业都离不开各式各样的机械设备这次毕业设计就是选择了这样一个课题75拖拉机变速箱体机械加工工艺规程设计使生产对象原材料毛坯零件或总成等的质和量的状态发生直接变化的过程叫工艺过程如毛坯制造机械加工热处理装配等都称之为工艺过程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19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辅具量具的选择基准面的选取定位和夹紧方案的拟定 关键字变速箱体 工艺路线 工序 Design of technics processes for the gearbox casing of 75 tractor ABSTRACT Machinery manufacturing is one of the pillar industries which show a nations development of technology and society Both traditional and burgeoning industries cant be separated from verities of mechanical equipment This disquisition had just selected such a taskto study the machining craft and the fixture for heavy boring shafting bearing holes of Dongfanghong tractorMake the state of quality and quantity of objects such as raw materials semifinished product component or assembly changes directly in the process is called craft process such as blank manufacturing machining heat treatment assembly and so on all is called process In the aspect of machining craft part drawing and the technological request were thought over with the help of some information about the machining craft of parts such as boxes it is arranged to produce the part in eighteen steps which include the information on what means to usewhich machine tools what fixtures assist tools and measure tools needed in each step Then selected datum plane for each step studied out orientation and clamping scheme for each step in the aspect of fixture designing I had designed a set of fixture for the heavy boring of the shafting bearing holes After some analyzing and calculating Keyword Gearbox casing Technics process Working procedure 目