机电一体化毕业设计-轴类零件加工工艺及夹具设计.doc

学号：0902010263 郑 州 华 信 学 院 毕 业 论 文 题目：轴类零件加工工艺及夹具设计 学生姓名：指导老师： 摘 ?要 轴类零件是机器中经常遇到的典型零件之一。它在机械中主要用于支承齿轮、带轮、凸轮以及连杆等传动件，以传递扭矩。按结构形式不同，轴可以为阶梯轴、锥度心轴、光轴、空心轴、曲轴、凸轮轴、偏心轴、各种丝杠等轴的长径比小于5的称为短轴，大于20的称为细长轴，大多数轴介于两者之间；轴用轴承支承，与轴承配合的轴段称为轴颈。轴颈是轴的装配基准，它们的精度和表面质量一般要求较高。根据零件的结构及其功能，运用定位夹紧的知识完成了夹具设计。 关键词：轴类零件、轴颈、夹具分Abstract The machine shaft is often encountered in one of the typical components. It is mainly used for support in mechanical gears, pulleys, cams and connecting rods and other transmission parts, to transfer torque. Different forms according to the structure, the axis can be divided into stepped shaft, taper spindle, axis, hollow shaft, crankshaft, camshaft, eccentric shafts, all kinds of screw shaft such as short axis aspect ratio of less than 5 large known as the slender shaft 20, most shaft in between; shaft bearings bearing, and bearing with the shaft segment called the journal. Journal is the axis of the assembly base, and their general requirements for precision and high surface quality. According to parts of the structure and function, using the knowledge of locating and clamping fixture design completed. Key words：Shaft, journ 目录 1. 轴类零件技术要求……………………………………1.1、尺寸精度………………………………………6 1.2、几何形状精度……………………………………6 1.3、 相互位置精度……………………………………………1.4、表面粗糙度………………………………………………2. 轴类零件的毛胚和材料…………………………………2.1轴类零件的毛胚……………………………………………2.2轴类零件的材料……………………………………………3. 轴类零件一般加工要求及方法…………………………3.1轴类零件加工工艺规程注意点……………………………3.2轴类零件加工的技术要求…………………………………3.3轴类零件的热处理…………………………………………4. 轴类零件工艺路线………………………………………4.1、传承轴图样分析……………………………………………4.2、确定毛坯……………………………………………………4.3、 确定主要表面的加工方法………………………………4.4、确定定位基准………………………………………………4.5、划分阶段……………………………………………………4.6、热处理工序安排……………………………………………4.7、加工尺寸和切削用量………………………………………4.8、 拟定工艺过程………………………………………………5.细长轴加工工艺特点……………………………………5.1、改进工件的装夹方法……………………………………5.2、采用跟刀架?………………………………………………5.3、采用反向进给……………………………………………5.4、采用车削细长轴的车刀6. 夹具的设计………………………………………………6.1铣床夹具设计………………………………………………6.1.1、六点定位原理…………………………………………………6.1.2、应用定位原理几种情况………………………………………16.1.3、确定要限制的自由度…