Research And Application Of The Key Technology Based On Reverse Engineering Modeling And Five-axis Machining Impeller

Integrated impeller,as the main component of turbine engine,is widely used in aerospace, ground propulsion systems, metallurgical and defense industries. Integrated impeller with splitter blades is a typical class of complex surface parts for its standard mould. Impeller blade design and manufacturing technology plays a vital role in the operation and reliability of the engine. In this paper, it uses reverse engineering techniques to reconstruct and redesign the surface model of integral impeller in design and goes into the research on manufacturing technique of five-axis machine tools.The appropriate research has been made in response to these two aspects of the problem.Due to the difficulties of establishing a free and complexity surface model, based on reverse engineering techniques to study surface reconstruction method. Using non-contact 3D scanners VIVID 9i to point cloud data collection of the real, will be transformed into real physical model of the measured data points. Rebuild the surface model to the shunt blades reconstruction by reverse software Imageware which based on feature point extraction method to find a shortcut of making faces.This paper also made some research on five-axis machining technology. Five-axis machine programming of integral impeller is much more difficult than ordinary CNC one which differs from the others in machining process. Axis machining program uses UGCAM integrated impeller machining module(MILL_MULTI_BLADE) for the program’s output, whose difficulty is processing blades and hub. Impeller with splitter blades, on which there’re more blades and more curvature changes, takes a very small working volume between the large blades and the small ones. Thus, interference are likely to occur between the blade machining tool and prone. In the process of preparation UGNX7.5 rough machining environment impeller blades of roughing and finishing blades in the program.Trial cutting on the impeller in the five-axis machining center trial, constantly changing and optimizing. Cutting parameters has improved roughness and cutting efficiency in the surface of integral impeller. Finally, verifying the optimal combination of cutting parameters by the experimental design and analysis. Orthogonal table to calculate the deviation of each factor and range values on different levels, based on the above calculation to determine the primary and secondary relationship between the factors and various factors that impact on different levels, through poor analysis identified in the processing of integral impeller factors affect test indicator to find the optimal combination of cutting parameters.