2단계공정을 이용한 헬리컬기어 압출에 관한 연구

A Study on Extrusion of Helical Gears by a Two-step Process

  • 정성윤 (부산대 대학원 정밀기계공학과) ;
  • 박준홍 (부산대 기계기술연구소) ;
  • 김철 (부산대학교 기계공학부) ;
  • 김창호 (동의대 기계산업시스템공학부) ;
  • 최재찬 (부산대 기계공학부) ;
  • 최상호 (광호정밀)
  • 발행 : 2002.04.01

초록

Of all the many types of machine elements which exist today, gears are among the most commonly used. Many researches have been done to manufacture helical gears by cold forging and extrusion. Although cold forging and extrusion were applied to some bevel, spur, and helical gears, problems in connection with reducing forming load and tool life still make it difficult for the related methods to be commercialized. In this study, focusing on reducing load in forming helical gears, extrusion of helical gears by a two-step process is proposed. The process is composed of an extrusion step of spur gears used as preform and a torsion step of the preform to make helical gears. Upper-bound analysis for the two-step process is performed and compared with results of experiments. The newly proposed method can be used as an advanced forming technique to remarkably reduce the forming load and replace the conventional forming process of helical gears.

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