Prediction and minimization of micro deformation on the automobile hood after dipping process

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• 作者：J. Kim (1)
  S. Park (1)
  N. Kim (1)
  N. Hur (1)
  C. Oh (2)
  
  1. Department of Mechanical Engineering ; Sogang University ; Seoul ; 121-742 ; Korea
  2. Headquarters of Product Development ; Hyundai路Kia Motors ; 150 Hyundaiyeonguso-ro ; Hyundaiyeonguso-ro ; Hwaseong-si ; Gyeonggi ; 445-706 ; Korea
  
• 关键词：Stiffness scanning ; Micro deformation ; Automobile hood ; Optimization ; Dipping process ; Transient pressure distribution ; Computational fluid dynamics analysis ; Technique of structural analysis
• 刊名：International Journal of Automotive Technology
• 出版年：2015
• 出版时间：April 2015
• 年：2015
• 卷：16
• 期：2
• 页码：293-300
• 全文大小：1,284 KB
• 参考文献：ABAQUS User鈥檚 Manual, Version 6.7. Hibbitt, Karlsson and Sorensen, Inc., Pawtucket, RI
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• 刊物类别：Engineering
• 刊物主题：Automotive and Aerospace Engineering and Traffic
  
• 出版者：The Korean Society of Automotive Engineers
• ISSN：1976-3832

文摘

During automobile dipping process, surface defects such as very small or micro deformation occurs intermittently on the assembled hood. The main cause of the surface defect is the location of hood supporting stay, structure of hood and pressure distribution resulted from fluid behavior in a paint pool. In order to minimize the defect, it is necessary to understand and predict the stiffness of the assembled hood as well as the fluid flow behavior in the paint pool, and the effects of locations of stays which are used in dipping process. This study has analyzed and simulated the micro deformation which occurs during dipping process. The difference between the measured and the computed stiffness of an assembled hood could be minimized by applying an equivalent material in the numerical model of assembled hood. It was found that the sequential application of fluid pressure to the hood structure in a painting pool was indispensable to obtain accuracy in the computation. By comparing the amounts of deformation which are measured in the actual process line with those of computation, the validity of the technique of computational fluid dynamics and technique of structural analysis have been confirmed. The optimal location of supporting stays to reduce the surface defects was given quantitatively with the coordinates.