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Design of the Anvil Shape in Sizing Press for Decrease of the Defect Generated Width Reduction

사이징 프레스에서 폭 압하 공정중 결함 저감을 위한 엔빌의 형상설계

  • Published : 2009.02.01

Abstract

Generally, a vertical rolling process is used to achieve extensive width reduction in hot strip mill. However, it is impossible to avoid the defects such as dog-bone and edge-seam defect. The sizing press process has been developed in response to the defects mentioned above. Especially, this study is carried out to investigate the deformation of slab by two-step sizing press. The deformation behavior of slab in the sizing press process is more favorable than that in conventional vertical rolling edger. The FE-simulation is applied to predict the deformation behavior of the slab. In this paper, the several causes of the asymmetrical deformation are mentioned for the purpose of understanding of the anvil shape. Load, dog-bone and edge-seam defect are discussed in width sizing process considering the anvil shape. And to reduce the problems generated at rougher mill just after sizing press, these are studied in this paper. The deformation behavior of slabs and optimum anvil shape are obtained by rigid-plastic finite element analyses and neural network.

References

  1. K. Isobe, T. Hira, H. Abe, 1989, Minimization of Crop Loss and Width Control of Hot Rolling Slabs by Width Sizing Press, The Japan Society for Technology of Plasticity, Vol.30, No.340, pp. 682-688
  2. T. Hira, K. Isobe, H. Abe, H. Nikaido, T. Fujisu, S. Zuyama, 1990, Deformation of Slab under Heavy Reduction of Width by Sizing Press, Kawasaki Steel Technical Report, No.22, pp. 32-40
  3. T. Fujitsu, T. Fujimoto, H. Nikaido, M. Nihei, 1989, Development of a slab sizing press for extensive slab width reduction, STEEL TIMES, MAY, pp. 266-270
  4. H. Nikaido, K. Fuziwara, H. Abe, M. Nihei, 1984, Development of Slab Sizing Press for Heavy Width Reduction in Hot Strip Mills, Iron and Steel Engineering, Vol.21, pp. 48-53
  5. M. S. Chun, J. S. Jheong, T. An, Y. H. Moon, 2003, Finite Element Analysis of Slab Deformation under the Width Reduction in Hot Strip Mill, The Korean Society for Technology of Plasticity, Vol 12, No.7, pp. 668-674 https://doi.org/10.5228/KSPP.2003.12.7.668
  6. D. H. Kim, D. C. Ko, B. M. Kim, J. C. Choi, 1998, Methodology of Preform Design Considering Workability in Metal Forming by the Artificial Neural Network and Taguchi Method, Journal of Material Processing Technology, Vol.80, pp. 487-492 https://doi.org/10.1016/S0924-0136(98)00152-6
  7. D. H. Kim, D. J. Kim, B. M. Kim, 1999, The Application of Neural Networks and Statistical Methods to Process Design in Metal Forming Processes, International Journal of Advanced Manufacturing Technology, Vol.15, pp. 886-894 https://doi.org/10.1007/s001700050146
  8. D. H. Kim, B. M. Kim, Y. Lee, 2003, Prediction of Wear Profile of Roll Groove in Rod Rolling using Incremental Form of Wear Model, Proceedings of the Institution of Mechanical Engineers Part B: Journal of Engineering Manufacture, Vol. 217, pp. 111-126 https://doi.org/10.1243/095440503762502323
  9. D. H. Kim, B. M. Kim, Y. Lee, 2003, Adjustment of Roll Gap for the Dimension Accuracy of Bar in Hot Bar in Hot Bar Rolling Process, International Journal the Korean Society of Precision Engineering, Vol. 4, No.1, pp. 56-62
  10. N. Egawa, H. Isuhizuka, T. Hiruta, 1999, Hot Rolling Technology for Producing High Quality Stainless Steel at No. 3 Hot Mill in Chiba Works, Kawasaki Steel Technical Report, No.40, pp. 16-22
  11. H. Yamaguchi, Y. Kusaba, T. Yamada, 1996, Improvement of Seam-Defects on Strip Edge of Stainless Steel, Iron and Steel Engineering, Vol.82, No.1, pp. 58-62