毕业设计（论文）-CA6140车床法兰盘工艺设计及专用夹具精选.doc

摘 要 机械制造工艺学是以研究机械加工工艺技术和夹具设计为主技术学科，具有很强的实践性，要求学习过程中应紧密联系生产实践，同时它又具有很强的综合性。机械加工工艺是指用机械加工的方法改变毛坯的形状、尺寸、相对位置和性质使其成为合格零件的全过程。　　本次毕业设计的课题是CA6140车床法兰盘加工工艺规程及某一工序专用夹具设计，主要内容如下：　　首先，对零件进行分析，主要是零件作用的分析和工艺分析，通过零件作用分析可以了解零件的基本情况，而工艺分析可以知道零件的加工表面和加工要求。根据零件图提出的加工要求，确定毛坯的制造形式和尺寸的确定。　　其次，进行基面的选择，确定加工过程中的粗基准和精基准。根据选好的基准，制订工艺路线，通常制订两种以上的工艺路线，通过工艺方案的比较与分析，再选择可以使零件的几何形状、尺寸精度及位置精度等技术要求得到合理的保证的一种工序。　　再次，根据已经选定的工序路线，确定每一步的切削用量及基本工时，并选择合适的机床和刀具。对于粗加工，还要校核机床功率。　　最后，设计第三道工序—钻法兰盘孔的夹具。先提出设计问题，再选择定位基准，然后开始切削力、夹紧力的计算和定位误差的分析。然后把设计的过程整理为图纸。　　通过以上的概述，整个设计基本完成。 关键词:法兰盘,机械加工工艺,夹具设计,工序,定位 Abstract Mechanical manufacturing technology is based on research of mechanical processing technology and fixture design technology, which has strong practicality, and requires close relation of production practice in the learning process. And it is also very strong comprehensive. Mechanical processing technology refers to the use of mechanical processing method to change the rough shape, size, relative location and nature to become qualified parts of the whole process. The graduation design is the subject CA6140 lathe machining procedure and flanges a procedure for fixture design, the main content as follows: Firstly, the analysis of main parts, the role of parts and is analyzed. Through the analysis technology of components we can understand the basic situation, and through part of process analysis can know requirements of parts of processing and surface processing. According to the requirements of machining parts graph, the shape and size of blank is determined. Secondly, we select the base, and make sure good benchmark and crude benchmarks in the mechanical process. According to good benchmark chosen, two or more processes is usually maken. Through the comparison and analysis process scheme, then we choose one guarantee which can reasonably make sure requirements of technology such as parts’ dimension accuracy , geometric shape and location accuracy . Thirdly, according to the process route has been s