Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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An upper-bound analysis for the guiding type forging of helical gears

헬리컬기어의 안내형 단조에 관한 상계해석

  • Choi, J.C. (Busan National University) ;
  • Choi, Y. (Dept.of Mechanical Design Engineering, Graduate School of Busan National University) ;
  • Tak, S.J. (Electro Technology R &D Center, LGIS)
  • 최재찬 (부산대학교 정밀정형 및 금형가공 연구센터, 기계설계공학과) ;
  • 최영 (부산대학교 대학원 기계설계공학과) ;
  • 탁성준 (LG산전(주) 전력연구소 메카닉스 연구팀)
  • Published : 1997.09.01
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Abstract

In this paper, the forging of helical gears has been investigated. Punch is tooth-shaped as is the die insert. The punch compresses a cylindrical billet placed in a die insert. As a consequence the material of billet flows into the tooth region. The forging has been analysed by using the upper-bound method. A kinematically admissible velocity field has been developed, wherein, an involute curve has been introduced to represent tooth profile of the gear. Numerical calculations have been carried out to investigate the effects of various parameters, such as module, number of teeth, helix angle and friction factor on the forging of helical gears. Some forging experimentswere carried out with aluminum alloy to show the validity of the analysis. Good agreement was found between the predicted values of the forging load and obtained from the experimental results.

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