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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2015, Vol. 36 ›› Issue (5): 1695-1703.doi: 10.7527/S1000-6893.2014.0171

• Material Engineering and Mechanical Manufacturing • Previous Articles     Next Articles

Model restructuring about leading edge and tailing edge of precision forging blade for adaptive machining

LIN Xiaojun1, CHEN Yue1, WANG Zhiwei1, GUO Yan2, GAO Yuan1, ZHANG Xin'ge1   

  1. 1. The Key Laboratory of Contemporary Design and Integrated Manufacturing Technology, Ministry of Education, Northwestern Polytechnical University, Xi'an 710072, China;
    2. Xi'an Aerospace Engine Factory, Xi'an 710100, China
  • Received:2014-06-11 Revised:2014-07-28 Online:2015-05-15 Published:2014-08-25
  • Supported by:

    National Science and Technology Major Project(2013ZX04011031)

Abstract:

In order to solve the problems such as "steps" which are caused by precision forging NC machining of the leading edge and the tailing edge in machining boundary, the model reconstruction method of adaptive machining is proposed. Firstly, according to the characteristics of precision forging blades, the machining program of leading edge and tailing edge is put forward. Secondly, according to the machining program, on-machine measurement model and the path planning are proposed. On this basis, according to the actual geometrical parameters of the leading edge and the tailing edge, as well as the tolerance of the center of circle and arc radius in the leading edge and the tailing edge of the theoretical models, a search algorithm is put forward to ascertain a new arc radius and center of the circle of the reconstruction model. Besides, according to the fitting line of the measurement points in each cross section line, theoretical cross section line and the circular arc of the search center and radius,models of the leading edge and the tailing edge are reconstructed. Finally, by comparing the deviation between the reconstruction model and the theoretical model, and the NC machining test, the proposed method is proved to be efficient in weakening the adverse effect of the "steps" between the actual type surface of the forging blade and the leading edge and tailing edge. In addition, this method can also provide evidence for the machining forming in the leading edge and tailing edge of precision forging blade under the background of the composite manufacturing process.

Key words: precision forging blade, leading edge and tailing edge, adaptive machining, path planning, model restructuring, search algorithm

CLC Number: