Volume 35 Issue 2
Feb.  2009
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Mei Zhongyi, Gao Hong, Wang Yunqiaoet al. Analyzing and controlling distortion of aircraft aluminium alloy structural part in NC machining[J]. Journal of Beijing University of Aeronautics and Astronautics, 2009, 35(2): 146-150. (in Chinese)
Citation: Mei Zhongyi, Gao Hong, Wang Yunqiaoet al. Analyzing and controlling distortion of aircraft aluminium alloy structural part in NC machining[J]. Journal of Beijing University of Aeronautics and Astronautics, 2009, 35(2): 146-150. (in Chinese)

Analyzing and controlling distortion of aircraft aluminium alloy structural part in NC machining

  • Received Date: 20 Jul 2008
  • Publish Date: 28 Feb 2009
  • NC machining distortion and the reason which leads to machining distortion were studied by analyzing the typical aircraft wing rib aluminium alloy structural part on which distortion often occurs. The part NC machining distortion was analyzed and compared by using the methods of theoretical model, finite element analysis and milling experiment. Residual stress distribution was analyzed in the part. Temperature simulation was added to the residual stress distribution of aluminium alloy by using thermal-mechanical coupling analysis of the FEM(finite element method) software. The influence on part distortion by cutting material was analyzed and simulated. The cutting process was simulated and improved through using the improving static elements deactivation method. Simulation distortion result of machining process was compared with the milling experiments and practical experience data. The validity of the analysis method and the finite element analysis model was verified. Several methods which can be used to predict and control machining distortion were proposed.

     

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