吉林大学学报(工学版) ›› 2015, Vol. 45 ›› Issue (5): 1481-1487.doi: 10.13229/j.cnki.jdxbgxb201505016

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Robust optimization designing method for three-dimensional flexible stretch bending forming

TENG Fei1, 2, LIU Bo3, ZHANG Wan-xi1, 2, GAO Song1, 2   

  1. 1.School of Automotive Engineering, Dalian University of Technology, Dalian 116024,China;
    2.State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China;
    3.Changchun Fuway Johnson Controls Automotive Systems Co. Ltd., Changchun 130033, China
  • Received:2015-03-11 Online:2015-09-01 Published:2015-09-01

Abstract: The uncontrollable factors and controllable factors of the profile of three-dimensional flexible stretch bending forming are analyzed. Based on the analysis, a comprehensive quality evaluation method of three-dimensional stretch bending and a robust optimization method are proposed. The uncontrollable factors and controllable factors are analyzed based on orthogonal experiments by finite element simulations, and the factors greatly influencing the forming quality are identified. The comprehensive quality evaluation method is established using the loss of comprehensive quality as the optimization objective. The objective includes reducing the springback and controlling the change rate of profile thickness. The response surface model is adopted to carry out the fitting function. Genetic algorithm is applied for robust optimization, and the optimization results are validated. The results show that the robust optimization method can effectively reduce the comprehensive quality loss while the constraints are satisfied.

Key words: manufacturing processes and equipment, three-dimensional flexible stretch bending, springback, robust optimization

CLC Number: 

  • TG386
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