吉林大学学报(工学版) ›› 2013, Vol. 43 ›› Issue (05): 1302-1306.doi: 10.7964/jdxbgxb201305025

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Shape control model for three-dimensional surface part in continuous flexible forming process

SUI Zhou, CAI Zhong-yi, LAN Ying-wu, LI Ming-zhe   

  1. Roll Forging Institute, Jilin University, Changchun 130022, China
  • Received:2012-08-13 Online:2013-09-01 Published:2013-09-01

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Abstract:

For given ordered data points, the Non-Uniform Rational B-spline (NURBS) interpolation technology was employed to construct the target surface and its intersection curve equations. Based on the interaction of springback effect and double curvature bending influence of sheet metal, the transverse (perpendicular to rolling direction) and longitudinal (along rolling direction) shape control models were developed. The relative positions of control units on the roll's axis and the downward displacement of upper flexible roll were obtained in continuous flexible rolling process. The combination of reverse engineering and continuous flexible forming technology was accomplished. The undetermined coefficient in the transverse shape control model was calculated by means of numerical simulation. Combining with the longitudinal shape control model, verification experiments were conducted. Results show that the final curvature was in good agreement with the target curvature.

Key words: material synthesis and processing technology, shape controlled model, downward displacement, non-uniform rational B-spline, springback effect

CLC Number: 

  • TG302

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