Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Prediction of Welding Pressure in the Non Steady state Porthole Die Extrusion of AI7003 Tubes

포트홀 다이 압출방식에 의한 AI7003 튜브의 접합강도예측

  • Jo, Hyung-Ho (Korea Institute of Industrial Technology) ;
  • Lee, Sang-Gon (Dept.of Precision Mechanical Engineering, Graduate School of Busan National University) ;
  • Lee, Seon-Bong (Dept.of Precision Mechanical Engineering, Graduate School of Busan National University) ;
  • Kim, Byung-Min (Sheet Products Process Research Group, Busan National University)
  • 조형호 (한국생산기술연구원 주조공정개발팀) ;
  • 이상곤 (부산대학교 대학원 정밀기계공학과) ;
  • 이선봉 (부산대학교 대학원 정밀기계공학과) ;
  • 김병민 (부산대학교 정밀정형 및 금형가공연구소)
  • Published : 2001.07.01
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Abstract

Porthole die extrusion is profitable to manufacture long tube with hollow section. The material through portholes is gathered within chamber and welded under high pressure. This weldability which classifies the quality of tube product is affected by several variables and die shape. But, porthole die extrusion has been executed on the experience of experts due to the complicated die assembly and complexity of metal flow. Analytic approaches that are useful in profitable die design and in the improvement of productivity are inevitably demanded. Therefore, the objective of this study is respectively to analyze the behavior of metal flow and to determine welding pressure of hot extrusion product according to the various billet temperature, bearing length and tube thickness by FE analysis and its results are compared with tube expanding tests.

Keywords

References

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