【文章內(nèi)容簡介】 re pelling. For example, largescale nuclear power plants in the waterwall tube plate condenser has 15000 ψ20 holes, if radial drilling machine processing, and simply drilling holes and countersink countersunk head is necessary to hours, while also crossed hours hours. However, if the 8axis CNC machining floor drilling, drilling countersink holes as long as hours, crossed is also simple, as long as hours. Therefore, the use of numerical control of two axis, so that proper alignment tool processing location, bined with multiaxis machining can not only expand the range of processing, but also on the basis of improving the accuracy can greatly enhance the work efficiency, easy to quickly create original processing parts. Some analysis of large highspeed diesel engine with 30 kinds of boxshaped rodshaped parts of the more than 2,000 drilling operations, 40% could be the automatic replacement of machines using twoaxis spindle box, threeaxis or fouraxis multiaxis machining head, the average can be reduced 20% of the processing time. Machine Tool Exhibition in Paris in 1975 also reflected the multiaxis machining using more and more the trend. Multiaxis machining equipment ：Multiaxis machining is the same time in a feed processing a number of holes or simultaneously in many of the same or different processing of a work piece on each hole. This will not only shorten the cutting time and improve accuracy, reduce fixturing or positioning time, and in the CNC machine tool is not necessary to calculate the coordinates, reducing the number of character blocks and simplified programming. It can be processed using the following equipment: radial drilling vertical drilling, or upload multiaxis head, multiaxis drilling machine, multiaxis modular machine tool spindle box heart and automatic replacement of machines. May even be able to automatically adjust wheelbase by two or more of the spindle axle box, junction All CNC vertical and horizontal table two directions of movement, processing a variety of round or ovalshaped hole group of one or several steps. Now the status quo in this regard to make a profile.Multiaxle box ：As also the first multiaxis as the production as a standard ponent. . Secto39。s standard gear boxes, multiaxle box, etc. are not designed adjustable multiaxle box. 32 kinds of specifications, process size from 300X300 mm to 600X1050 mm, the workingaxis up to 60, and power up to kilowatts. Romai factory adjustable multiaxle box easy to adjust, as long as the gear should first be adjusted to the location near the pass and then connected with its adjustableaxis move to the correct location. Therefore, this structure changes as long as the template, will be able to pass a certain extent change the content of shoes, and can reach more than ordinary axle box smaller pitch. According to principles of the use of group processing the first multi axle, or a bination of multiaxis machine tool is applicable to large and medium volume production. In order to process to get good results, need to consider the following points: (1) work piece clamping simple, there is enough coolant away iron filings. (2) The fixture rigidity, processing, without deformation, dividing the right position. (3) the possibility of using the two group knives for a group to use, another set of grinding and adjustment, thereby reducing tool change downtime. (4) The use of quality tools to monitor whether the blunt tool, drill grinding to machine. (5) Dimensions can be detected immediately when the ultrapoor. Trends in multiaxis machining ：Multiaxis machining high production efficiency, low investment and production preparation cycle is short, product modification, when a small loss of equipment. And as China39。s CNC technology, the scope of multiaxis machining will bee the broad, processing efficiency will be improved. China39。s small and medium enterprises in product quality and production efficiency are the need for a new increase. But the processing means is far from sufficient. Many mini and medium panies with their actual technical state of equipment improvements, through strengthening its own equipments. In order to acplish selfdevelopment drilling for singleaxis machine tools, but the installation will bee a multiaxis multiaxle box of the drill, transformation into a multiaxis drilling, we could greatly shorten the processing time, improve production efficiency. This paper introduces a special horizontal type bination machine tools designed for gearbox shell 6X φ12 thread holes on the surface drilling the specific processes. In this design, all the standard parts selection based on the carefully data calculation, and according to the characteristics of the structure by processing ponents, precision machining parts size, surface roughness, and the localization way, clamping technology and processing process using tools, cutting dosages as productivity, the structure design of reasonable spindle box. This project thesis mainly elucidates the basic process and requirements that design of the bination machine. Combination machine is designed according the fundamental, which was highly concentrated，or more correctly it can process one working procedure or more different working procedures at one time . Combination machine was developed in the end of industrial production pared with traditional machine。 bination machine has many goodness, such as high efficiency ，high accuracy and low cost . It is posed of some general parts， such as bed ,column ,work able ,power unit ,and some special parts designed according to different work piece machining need.The preface of a lot of works can be pleted on the bination machine, but in regard to the majority current usage of bination machine, then and primarily used for the flat surface to process and the bore to process two big work introduction. The main part including :(1) Formulating technological plan，We’ve learned the cha