소성∙가공 (Transactions of Materials Processing)

  • 제14권5호
  • /
  • Pages.423-431
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  • 2005
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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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소재의 탄성회복과 금형의 탄성변형을 고려한 냉간단조품의 치수 예측

Prediction of Dimensions of Cold Forgings Considering Springback of Material and Elastic Deformation of Die

  • 전병윤 (경상대학교 수송기계부품기술혁신센터) ;
  • 강상명 (㈜삼광공업) ;
  • 박재민 (큐빅테크) ;
  • 이민철 (경상대학교 기계공학과 대학원) ;
  • 박래훈 (경상대학교 기계공학과 대학원) ;
  • 전만수 (경상대학교 기계항공공학부)
  • 발행 : 2005.08.01
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초록

In this paper, a systematic attempt for estimating geometric dimensions of cold forgings is made by finite element method and a practical approach is presented. In the approach, the forging process is simulated by a rigid-plastic finite element method under the assumption that the die is rigid. With the information obtained from the forging simulation, die structural analysis and springback analysis of the material are carried out. In the springback analysis, both mechanical load and thermal load are considered. The mechanical load is applied by unloading the forming load elastically and the thermal load is by cooling the increased temperature due to the plastic work to the room temperature. All the results are added to predict the final dimensions of the cold forged product. The predicted dimensions are compared with the experiments. The comparison has revealed that predicted results are acceptable in the application sense.

키워드

참고문헌

  1. U. Engel, M. Hansel, 1990, FEM-Simulation of Fatigue Crack Growth in Cold Forging Dies, Adv. Tech. Plast., Vol. 1, pp. 355-360
  2. Z. Xing-hua, 1990, Finite Element Analysis of Container and Accuracy Control of Extrusion Products, Adv. Tech. Plast., Vol. 1, pp. 343-348
  3. K. Lange, A. Hettig, M. Knoerr, 1992, Increasing Tool Life in Cold Forging through Advanced Design and Tool Manufacturing Techniques, J. Mat. Proc. Tech., Vol.35, pp. 495-513 https://doi.org/10.1016/0924-0136(92)90337-R
  4. K. F. Hoffmann, K. Lange, 1989, Computation of the Elastic Expansion and Stresses in Cold Extrusion Dies with Non- Axisymmetric Inner Shape, Trans. NAMRI of SME, Vol., pp. 71-78
  5. S. Takahashi, C. A. Brebbia, 1990, Forging Die Stress Analysis Using Boundary Element Method, Adv. Tech. Plast., Vol. 1, pp. 203-210
  6. Y. Ochial, R. Wadabayashi, 1987, Application of Boundary Element Method to Cold Forging Die Design, Adv. Tech. Plast., Vol. 1, pp. 37-42
  7. M. Fu, B. Shang, 1995, Stress Analysis of the Precision Forging Die for a Bevel Gear and its Optimal Design Using the Boundary-Element Method, J. Mat. Proc. Tech., Vol. 53, pp. 511-520 https://doi.org/10.1016/0924-0136(94)01754-O
  8. M. S. Joun, M. C. Lee, J. M. Park, 2002, Finite element analysis of prestressed die set in cold forging, Int. J. Math. Tools Manuf., vol. 42, pp. 1214-1222
  9. 전병윤, 2000, 금형의 변형과 소재의 탄성회복을 고려한 정밀 냉간단조 공정설계 기술에 관한 연구, 석사학위 논문, 경상대학교
  10. Y. S. Lee, J. H. Lee, Y. N. Kwon, T. Ishikawa, 2004, Modeling approach to estimate the elastic characteristics of workpiece and shrink-fitted die for cold forging, J. Mater. Process. Technol., vol. 147, pp. 102-110 https://doi.org/10.1016/j.jmatprotec.2003.12.008
  11. S. I. Oh, J. P. Tang, A. Badawy, 1984, Finite Element Mesh Rezoning and its Applications to Metal Forming Analysis, Advd. Tech. Plasticity, Vol. 2, pp. 1051-1058
  12. C. H. Lee, S. Kobayashi, 1973, New Solution to Rigid Plastic Deformation Using a Matrix Method, Trans. ASME, J. of Eng. for Ind., Vol. 95, pp. 865-873 https://doi.org/10.1115/1.3438238
  13. O. C. Zienkiewicz, P. N. Godbole, 1975, A Penalty Function Approach to Problems of Plastic Flow of Metals with Large Surface Deformation, J. of Strain Analysis, Vol. 10, No. 3
  14. K. Osakada, J. Nakano, K. Mori, 1982, Finite Element Method for Rigid-Plastic Analysis of Metal Forming-Formulation for Finite-Deformation, Int. J. Mech. Sci., Vol. 24, pp. 459-469 https://doi.org/10.1016/0020-7403(82)90056-X
  15. S. I. Oh, N. Rebelo, S. Kobayashi, 1978, Finite Element Formulation for the Analysis of Plastic Deformation of Rate-Sensitive Materials in Metal Forming, IUTAM Symposium, Tutzing/Germany, pp. 273-291
  16. C. C. Chen, S. Kobayashi, 1978, Rigid-Plastic Finite Element Analysis of Ring Compression, Application of numerical methods to forming processes, ASME, AMD, Vol. 28, pp. 163-174
  17. S. I. Oh, 1982, Finite Element Analysis of Metal Forming Processes with Arbitrary Shaped Dies, Int. J. Mech. Sci., Vol. 24, pp. 479-493 https://doi.org/10.1016/0020-7403(82)90058-3
  18. 전만수, 김형일, 2000, 고체역학에서 유한요소법까지, 피어슨에듀케이션코리아
  19. S. M. Hwang, M. S. Joun, J. S. Park, 1990, A Penalty Rigid-Plastic Finite Element Method for the Determination of Stress Distributions at the Tool-Workpiece Interface in Metal Forming, Trans. of NAMRI of SME, Vol. XVIII, pp. 13-19
  20. S. M. Hwang, M. S. Joun, Y. H. Kang, 1993, Finite Element Analysis of Temperatures, Metal Flow and Roll Pressure in Hot Strip Rolling, ASME Trans. J. Eng. for Industry, Vol. 115, pp. 290-298