Research On The Key Technologies A Five-axis Machining Center Processing Integral Hard Alloy Turbine Rotors

The turbo-molecular pump is an important facility used to obtain a high vacuum environment widely. Turbine rotors are the core parts in the turbo-molecular pumps. The whole turbine rotor blade is multilayer parts, which material is aerospace grade aluminum alloy. The whole turbine rotor is a high-speed rotating part, and the blade is under the action of alternating stress for a long time. It is necessary for very high surface quality to avoid the failure caused by fatigue failure and micro cracks on the surface of the blade. In order to obtain the surface quality of the blade, the whole turbine rotor is usually processed by multi axis machining centers in high speed milling process. Domestic enterprises processing turbine rotors are few. Meanwhile, most of the processing equipments-machining centers used are primarily imported, and the purchasing and maintenance costs are really high.Developed machining centers with independent intellectual property rights and what can be applied to the processing integral turbine rotors have important strategic significance to Chinese microelectronics industry. "The five-axis machining center XKR50 to process hard alloy integral turbine rotors" is supported by the National Science and Technology Major Project of China under Grant No. 2010ZX04001-042. It aims at resolving the machining problems of turbine rotors.This paper is based on the project, and some key technologies of XKR50 and machining turbine rotors were conducted in-depth research. Including: The five-axis machining center XKR50 structure improvement, a comprehensive assessment of the structure effectiveness to provide a theoretical basis for stereotypes; study the static error compensation for XKR50 and space static error interpolation methods and its mathematics model; XKR50 digital prototyping, integral turbine rotor and impeller machining process simulation, the correctness of the NC program verification; deformation control technology and machining verification of the duralumin integral turbine rotor blade machining. The method of reducing blade machining deformation, and research the advantages and disadvantages of different machining methods.