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Forming of Dome and Inlet Parts of a High Pressure CNG Vessel by the Hot Spinning Process

열간 스피닝 공정을 통한 CNG 고압용기의 돔 및 입구 부 성형

  • Lee, Kwang O (Research Institute of Mechanical Technology, Pusan Nat'l Univ.) ;
  • Park, Gun Young (Research Institute of Mechanical Technology, Pusan Nat'l Univ.) ;
  • Kwak, Hyo Seo (Dept. of Mechanical Convergence Technology, Pusan Nat'l Univ.) ;
  • Kim, Chul (Research Institute of Mechanical Technology, Pusan Nat'l Univ.)
  • 이광오 (부산대학교 기계기술연구원) ;
  • 박건영 (부산대학교 기계기술연구원) ;
  • 곽효서 (부산대학교 기계융합기술학과) ;
  • 김철 (부산대학교 기계기술연구원)
  • Received : 2016.05.16
  • Accepted : 2016.07.04
  • Published : 2016.10.01

Abstract

The CNG pressure vessel is manufactured by a deep drawing and ironing (D.D.I) process for forming cylinder parts, followed by a spinning process for formation of the dome part. However, studies on the buckling phenomenon of the dome part and formation of the inlet part have not been performed yet, and the CNG pressure vessel is produced by the experience of the field engineers and the trial and error method. In this study, buckling phenomenon during the spinning process was predicted by comparing critical buckling loads obtained through theoretical analysis with axial loads from the FEA, and a method for preventing buckling of the dome part was proposed by employing commercial software (Forge NxT 1.0.2). Also, to form the inlet part, forming loads of the roller at contact point between the roller and the dome part were analyzed according to radii of the dome part, and the inlet part was formed by controlling the radius of the dome part.

Keywords

Pressure Vessel;Spinning;Buckling;Roller Feeding Distance;Dome Part;Inlet Part;Radius of Dome Part

Acknowledgement

Supported by : 한국연구재단

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