毕业夹具设计设计说明书.docVIP

摘 要 关键词：， Abstract The present paper is combing the actual production at present, which is that either using universal fixture cannot meet only production requirements or using universal fixture clamping work-piece to product is poor efficiency and powerful labor and not high processing quality or often it need to increase crossed process, to specially design two fixture: milling fixture and drilling fixture, mainly including schemes of fixture positioning, clamping and cutter, the design of the concrete and the TAB folder and the analysis of machining precision et al. The milling fixture, having good processing precision and targeted, mainly is used to process dial the fork parts milling flutes. The fixture with clamping force device has the characteristics of efficiency and precision required by modern machine tools. It is so effectively to reduce the processing time and auxiliary time that greatly improve the labor productive, effectively reduce the labor intensity and increase the work efficiency as well. Drilling fixture is good for raising productivity, expanding machine machining scope, reducing labor intensity and ensuring the production safety. Therefore, it is especially important to learn and study the knowledge of fixture and design new suitable for practical production fixture nowadays. Key words：fficiency 目 录 摘 要 I Abstract II 1 绪论 1 1.1 夹具概念 1 1.2 夹具的主要功能 1 1.3 夹具的分类 1 1.4 夹具的组成 2 1.5 常用定位元件及选用 2 1.6 工件的夹紧 7 1.7 机床夹具的现状及发展方向 9 2 钻床夹具设计 12 2.1 工件预加工内容 12 2.2 初定夹具结构方案 12 2.3 绘图 16 3 铣床夹具设计 17 3.1 铣床常用通用夹具的结构 17 3.2 铣床夹具的设计特点 17 3.3夹具装夹工件的特点 17 3.4铣床夹具的安装 17 3.5铣床夹具的对刀位置 18 3.6定位方案 18 3.7夹紧方案 21 3.8铣刀分类 21 3.9夹具体与定位键 22 3.10夹具总图上的尺寸、公差和技术要求 22 3.11夹具精度分析 22 结 论 24 致 谢 25 参考文献 26 附 录 27 1 绪论 1.1 夹具概念 夹具是在机械制造过程中，用来固定加工对象，使之占有正确的位置，以接受加工或检测并保证加工要求的机床附加装置，简称为夹具。在我们实际生产中夹具的作用是将工件定位，以使加工工件获得相对于机床和刀具的正确位置，并把工件可靠地夹紧。 1.2 夹具的主要功能 在机床上加工工件的时候，必须用夹具装好夹牢所要加工工件。将工件装好，就是在机床上确定工件相对于刀具的正确位置，这一过程称为定位。将工件夹紧，就是对工件施加作用力，使之在已经定好的位置上将工件可靠地夹紧，这一过程称为夹紧。从定位到夹紧的