소성∙가공 (Transactions of Materials Processing)

  • 제21권8호
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  • Pages.479-484
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  • 2012
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  • 1225-696X(pISSN)
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  • 2287-6359(eISSN)
한국소성∙가공학회 (The Korean Society for Technology of Plasticity and materials processing)
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성형 오차 예측 모델을 이용한 가변 성형 공정에서의 탄성 회복 보정

Compensation for Elastic Recovery in a Flexible Forming Process Using Predictive Models for Shape Error

  • Seo, Y.H. (Department of Aerospace Engineering, Pusan National University) ;
  • Kang, B.S. (Department of Aerospace Engineering, Pusan National University) ;
  • Kim, J. (Department of Aerospace Engineering, Pusan National University)
  • 투고 : 2012.08.27
  • 심사 : 2012.11.27
  • 발행 : 2012.12.01
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초록

The objective of this study is to compensate the elastic recovery in the flexible forming process using the predictive models. The target shape was limited to two-dimensional shape having only one curvature radius in the longitudinal-direction. In order to predict the shape error the regression and neural network models were established based on the finite element (FE) simulations. A series of simulations were conducted considering input variables such as the elastic pad thickness, the thickness of plate, and the objective curvature radius. Then, at sampling points in the longitudinal-direction, the shape errors between formed and objective shapes could be calculated from the FE simulations as an output variable. These shape errors were expressed to a representative error value by the root mean square error (RMSE). To obtain the correct objective shape the die shape was adjusted by the closed-loop using the neural network model since the neural network model shows a higher capability of estimating the shape error than the regression model. Finally the experimental result shows that the formed shape almost agreed with the objective shape.

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참고문헌

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  8. Y. H. Seo, S. C. Heo, T. W. Ku, J. Kim, B. S. Kang, 2011, Design of Flexible Die Punch and Control System for Three-dimensional Curved Forming Surface, Trans. Mater. Process., Vol. 20, No. 3, pp. 204-211. https://doi.org/10.5228/KSTP.2011.20.3.206
  9. Y. H. Seo, S. C. Heo, B. S. Kang, J. Kim, 2011, Statistical Study on Correlation Between Design Variable and Shape Error in Flexible Stretch Forming, Trans. Mater. Process., Vol. 20, No. 2, pp. 124-131. https://doi.org/10.5228/KSTP.2011.20.2.124
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피인용 문헌

  1. Development of Profile Design Method Based on Longitudinal Strain for Flexible Roll Forming Process vol.22, pp.7, 2013, https://doi.org/10.5228/KSTP.2013.22.7.401
  2. Flexible roll forming process design for variable cross-section profile vol.16, pp.1, 2015, https://doi.org/10.1007/s12239-015-0009-2
  3. Flexible Roll Forming Technology for Multi-Curved Sheet Metal Forming vol.22, pp.5, 2013, https://doi.org/10.5228/KSTP.2013.22.5.243