| Confronted with lack of resource and serious environment pollution, wind power was focused on its abundant resource, excellent environment benefit and low cost. Developing wind power could not only reduce resource consume and environment pollution, but also advance technology promotion. Exploitation and utilization of wind power is a significant means to advancing pollution emission reduction. In recent years, wind power production has a fast development in China, but the level of manufacturing of wind power equipment is still lower. The majority of components of wind power equipment dependent on imports. Therefore, the reasonable development of an domestic wind energy equipment will has a great influence on sufficient energy for native modernization drive and efficient optimize of energy source composition.This dissertation is based on the cooperated project of Tianshui Spark Machine Tools Company and Lanzhou University of Science & Technology which aimed to design and develop a special NC boring-milling machine of machining 2MW rotor hub of aerogenerator.A new concept of spindle system, twin spindles system, rotor hub system, Oiling and a new form of the spindle components were raised during process of researching. The design of the machine is to use existing technology and components of Tianshui Spark Machine Tools Company. The design of CNC boring and milling machine for manufacturing rotor hub of wind power is also used the technology and components of the company. This will promote wind power localization in China, reducing the cost of wind power equipment.First of all, this article overall described CNC boring and milling machine. The design point determine the layout and form of the machine tool and distribution, and discussed in detail principles of design spindle box and spindle components of the special CNC boring and milling machine. It also detailed described twin spindles system and rotor hub system. In addition, introduced Determination of main parameters, the choice of main bearings, rod bodies calculation disc spring tension.In addition, this paper described the design of main-driver on CNC boring-milling machine, including the calculation of cutting force and cutting speed; analysis and the design of the feed system of X, Y, Z and other designs.Last, the finite element model of spindle box and twin spindles was established on ANSYS and the analysis on its Static characteristics and dynamic characteristics which was carried out. The bottle neck of the structure was conducted by applying this method, which will provide technology and support for the optimization design of the structure.The design with the technology sector of Tianshui Spark Machine Tools Company was discussed and modified for many times. At present, the project has been finished and the CNC boring and milling machine has been manufactured. The design of the twin spindles system and annular-cylinder systems have applied for national invention patent, and applied by the State Intellectual Property Office on January 1, 2008.This research project ranged over many topics, the design of CNC boring-milling machine considered many factors, and the time of design and research is limited. So the design is difficult to avoid disadvantages, at the same time, the CNC boring-milling machine should be continuously improved on many details, when it is after use. For now, the future research directions and consummate content have: design of electrical System; human-computer interface become more fully human, the computer controlling system of the CNC boring-milling machine; analysis on Static characteristics and dynamic characteristics of a whole machine.
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