机械制造技术课程设计-凸轮杆加工工艺及钻φ20孔夹具设计.doc

PAGE PAGE I 凸轮杆设计工艺及夹具设计 摘要 在经济飞速向前的当下，制造业快速发展的今天。非标零件的尺寸、结构也千变万化。以往设计的通用夹具，越来越多的面临淘汰。所以专用夹具的设计与生产越来越广泛。专用夹具的研究其主要内容有定位方案、夹紧方案的确定，定位元件、夹紧元件的选择，导向装置的选择等等。 本次设计研究的对象是凸轮杆。设计内容包括2个方面：1、工艺分析；2、钻Ф20孔钻床专用夹具设计。凸轮杆是机器上不可或缺的零件之一，为机器及零部件的正常运转提供保障。 从零件结构分析入手，合理选择定位基准，各种刀具参数选择以及切削用量的选择等。在安排工艺过程时，根据加工要求不同，需要进行粗精加工。另外还确定了切削参数，加工工时，填写工艺过程卡片和工序卡片。专用夹具设计内容有：确定定位方案及元件，确定夹紧方案及元件，确定导向装置，计算切削力及夹紧力等。 关键词：凸轮杆、工艺、Ф20孔、钻床、专用夹具 Abstract With the rapid development of the economy, manufacturing industry is developing rapidly today. The size and structure of non-standard parts are also ever-changing. In the past, more and more common fixtures have been eliminated. Therefore, the design and production of special fixture are more and more extensive. The main contents of the research of special fixture include positioning scheme, clamping scheme determination, positioning element, clamping element selection, guiding device selection and so on. The object of this study is the cam bar. The design content includes 2 aspects: 1, process analysis; 2, drill jig 20 hole drilling special fixture design. Cam rod is one of the indispensable parts of the machine, which provides guarantee for the normal operation of the machine and parts. Starting from the analysis of part structure, the location datum, tool parameters and cutting parameters are selected reasonably. When arranging the technological process, rough finishing is required according to different processing requirements. In addition, cutting parameters, machining hours, process process cards and process cards were determined. The design contents of special fixture include: determining the positioning scheme and components, determining the clamping scheme and components, determining the guiding device, calculating the cutting force and clamping force, etc. Key words: cam rod, process, 20 hole, drilling machine, special fixture PAGE PAGE III 目 录 TOC \o 1-3 \h \z \u 摘要 I Abstract II 1 绪论 1 1.1 机床夹具的组成 1 1.2 机床夹具的分类 1