摘　　要

 
本设计的课题是汽缸体左右端面钻孔组合机床设计。主要说明组合机床设计的基本过程及要求。组合机床是根据工件加工的需要，以大量的通用部件为基础，配以少量的专用部件组成的一种高效的专用机床。组合机床一般采用多轴、多刀、多工序、多面或多工位同时加工的方法，生产效率比通用机床高几倍到几十倍。与传统的机床相比：组合机床具有许多优点：效率高、精度高、成本低。它由床身、立柱、工作台、及电源一些基本部件及一些特殊部件，根据不同的工件加工所需而设计的。多年来机械产品加工中广泛的采用万能机床，但是随着生产的发展，很多企业的产品的产量越来越大，精度越来越高，采用万能机床加工已经不能很好的满足要求。理所当然，组合机床可以提高生产效率和加工精度。在组合机床设计过程中，为了降低组合机床的制造成本，应尽可能的使用通用件和标准件。
在组合机床上可以完成很多工序，但就目前使用的大多数组合机床来说，则主要用于平面加工和孔加工两大类工序。本设计主要内容包括三大部分大部分：1、组合机床的总体设计，就是确定机床各部件之间的相互关系，选择通用部件和刀具的导向，并确定切削用量及选择刀具；2、组合机床“三图一卡”的编制，就是绘制被加工零件的工序图，加工示意图、机床尺寸联系图及生产效率计算卡；3、多轴箱的设计，包括绘制多轴箱设计原始依据图，多轴箱的传动设计及传动零件的校核。专用多轴箱的设计，传动布局合理，轴与齿轮之间不发生干涉，保证传动的平稳性和精确性。专用主轴设计、轴承的选用及电机的选择等。
 关键词：组合机床；设计；汽缸体端盖；钻孔；工艺
 

 ABSTRACT

 
The subject of the design is the cylinder body end face drilling combination machine and fixture design. Mainly to explain the basic process and requirements of the combination machine design. combination machine is an efficient special purpose machine which is based on a large number of common components and a small number of dedicated components according to the needs of the work piece. Combination machine was developed in the end of industrial production compared with traditional machine; combination machine has many advantages , such as high efficiency , high accuracy and low cost . It is composed of some general parts , such as bed ,column ,workable, power unit ,and some special parts designed according to different work piece machining need. Over years, a universal machine is widely used in mechanical processing, but with the development of production, production is growing and accuracy is higher of many machining products, so the use of universal machine can not meet the requirements. Of course, combination machine can improve production efficiency and precision. It should be possible to use common parts and standard parts in order to reduce the manufacturing cost of combination machine in the combination machine design process.
The preface of a lot of works can be completed on the combination machine, but in regard to the majority current usage of combination machine, then and primarily used for the flat surface to process and the bore to process two big work preface.  The main part including：1) Combination machine frame design： determines the interrelation of the different part in the machining tool, select general parts and tool oriented .Then compute cut feed and productivity finally draw a sketch map of the machine. 2) The preparation of combination machine “Three figs and one card”, that is to draw the process diagram of the parts to be processed, processing schematic, machine dimensions contact map and  production efficiency calculation card；3) Combination machine parts design including headstock, proper transmission layout, shaft and gear move freely without interference which ensure the stability and accuracy during transmission ,then design dedicated select bearings and engine etc.
 
Key words：Combination Machine；Design；The Cylinder Body Face；Drilling；Process