1、 - 1 - 摘摘 要要：组合机床的特点是，设计制造周期短，加工效率高，成本低，加工质量好， 自动化程度高，在大批大量生产中广泛运用。 本课题先对零件进行工艺分析，确定其工艺路线，然后针对变速箱壳体端 面上 280 孔镗削这一特定工序而设计的一台专用双面镗卧式组合机 床。设计中，在充分数据计算出切削用量的基础上对标准通用部件做了仔 细选择，设计出组合机床的总体结构，并依据被加工零件的结构特点，加 工部位的尺寸精度，表面粗糙度要求，选择合适的定位夹紧方式，设计了 结构合理的夹具。 关键词关键词：组合机床,箱体零件，镗削头,夹具 - 2 - Abstract：Machine tool is cha
2、racterized by design and manufacturing cycle is short, processing efficiency, low cost, good processing quality, high degree of automation in a large number of widely used in mass production. First on the parts of the project process analysis to determine their process route, and then for the gearbo
3、x housing end surface 2 80 hole boring process designed this particular special two-sided a horizontal boring machine tool. Design, calculated in the full data on the basis of cutting parts made of standard universal carefully selected to design the overall structure of machine tool, and based on st
4、ructural features of the part to be machined, machining parts of the dimensional accuracy, surface roughness,Select the appropriate positioning clamp method was designed structured fixture. Keyword: Machine tool, box parts, boring head, fixture - 3 - 1 引 言 1.1 组合机床概述 组合机床是以通用部件为基础，配以按工件特定形状和加工工艺设计的专用部 件和夹具，组成的半自动或自动专用机床。 组合机床是当前机械制造业实现产品更新，进行技术改造，提高生产效率和高 速发展必不可少的设备之一。加工对象主要是生产批量比较大的大中型箱体类和轴 类零件。生产效率比通用机床高几倍至几十倍。由于通用部件已经标准化和系列化， 可根据需要灵活配置，能缩短设计和制造周期。因此，组合机床兼有低成本和高效 率的优点，在大批、大量生产
