Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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A Study on the Hot Free Forging of Heavy Rotors Using Conventional Dies

평다이를 이용한 대형로타의 자유단조에 관한 연구

  • 이경호 (부산대학교 대학원 기계설계공학과) ;
  • 조종래 (한국해양대학교 기계냉동자동차공학부) ;
  • 배원병 (부산대학교 기계설계공학과 정밀정형 및 금형가공 연구센터)
  • Published : 1997.06.01
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Abstract

In this research, to obtain the optimal die width of CV die(conventional die), which replaces FM die in free forging of large scale rotor using the flat die, the model material experiments and theoretical analysis using three dimensional FEM are performed. The FM die, which was designed to remove Mannesmann's effect at the central part of the ingot, has very bad workabiltity in real field, therefore on the empirical base they use the CV die of wide width in actual working field. In this study, the excellency of CV die is proved quantitively, and the optimal die width of CV die is determined through the model material experiments and theoretical analysis using FEM in the point of effective strain, stresses, and load.

Keywords

References

  1. Phil.Mag. The Use of Plasticine models to Simulate the Plastic Flow of Metals Green, A.P.
  2. J. of Mech. Working Tech. v.19 Phyiscal Modeling of Blocking Processes in Open-Die Press Forging Erman, E.;Medei, N.M.;Roesch, A.R.;Shah, D.C.
  3. J. of Mech. Working Tech. v.19 Physical Modeling of Upsetting Processes in Open-Die Press Forging Erman, E.;Medei, N.M.;Roesch, A.R.;Shah, D.C.
  4. 塑性と加工 v.22 no.249 大型熱間自由鍛造 時の內部應力の特性 中鳥造衛;渡邊和夫;渡邊司郞;田村 至;中田和廣
  5. 塑性と加工 v.22 no.251 內部空隙の變形に及ぼす鍛造條件および應力ひずみ條件の影響 中鳥造衛;渡邊和夫;渡邊司郞;田村 至;中田和廣
  6. J. of Eng. for Industry Analysis of Axisymmetric Upsetting and Plane-Strain Side Pressing of Solid Cylinders by Finite Element Method Lee, C.H.;Kobayashi, S.
  7. J. of Advanced Manufacturing Processing v.1 no.s-4 Finite Element Simulation of Internal Void Closure in Open-Die Press Forging Shah, K.N.;Kiefer, B.V.;Gavigan, J.J.
  8. Int. J. Mech. Sci. v.30 Rigid-Plastic Finite Element Analysis of Three-Dimensional Forging by Considering Friction on Contnuous Curved Dies with Initial Guess Generation Yoon, J.H.;Yang, D.Y.
  9. Proc Instn Mesh Engrs v.206 Investigation of the Cogging Processes by Three-Dimensional Thermo-Viscoplastic Finite Element Analysis Cho, J.R.;Park, C.Y.;Yang, D.Y.
  10. 한국소성가공학지 v.4 no.2 평다이를 사용하는 자유단조 공정의 최적단조 조건에 관한 연구 조종래;김동권;이부윤;양동열
  11. 日本製鋼所技報 no.48 溫間鍛鍊法における 空隙壓搾 效果-3次元有限要素法による解析 小野信市;南克之;村井悅夫;岩 忠雄