偏心工件加工及夹具设计偏心工件加工及夹具设计.doc

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、凸轮以及连杆等传动件，按照结构类型不同，轴可以分为很多种如：阶梯轴、锥度心轴、空心轴、凸轮轴等，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。根据零件的结构类型、及其功能，运用定位夹紧的知识从而完成了夹具设计。 关键词：轴类零件、轴颈、夹具、工艺分析 The shaft parts are one of the typical parts of the machine.. It in the machinery is mainly used to support gear, cam and connecting rods and other transmission parts, according to the different structure types of axis can be divided into many types such as stepped shaft, taper mandrel, a hollow shaft, camshaft, long shaft diameter ratio is less than 5 for short axis, more than 20 are referred as the slender shaft, most of the shaft in between, shaft bearing, and bearing with the shaft segment known as the axle journal. The axis of the journal is the axis of the assembly reference, and their accuracy and surface quality are generally higher. According to the structure type and function of parts, the fixture design is accomplished by using the knowledge of positioning and clamping.. 目录 目 录………………………………………………………1 偏心工件的加工 一.问题的引出........................................................................................................... 2 二、垫片厚度与垫片形状的选择 .........................................................................3 三、偏心工件的车削............................................................................................... 4 四、加工偏心工件时容易产生的问题及应注意的事项....................................... 5.6 五、结语.... .............................................................................................................. 6 偏心工件夹具设计 一.偏心夹具的设计思路..............................................7 二.偏心夹具结构分析 ...............................................8 三.线切割找正和加工 ..........................................9.10.11 四.锁紧装置结构特点 ...............................................12 五.夹具的应用 ...............................................13 结束语 ...............................................................................................