Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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Design of Noncircular Gears for Wire EDM

비원형 기어의 와이어 방전가공을 위한 설계

  • Lee, Sung-Chul (Dept. of Mechanical Engineering, Inha Technical College)
  • 이성철 (인하공업전문대학, 기계과)
  • Published : 2008.10.31
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Abstract

This paper presents a step-by-step design of noncircular gears. From the diagram of angular velocity ratio of a noncircular gear pair, the pitch curves of the two mating gears are determined, and the perimeter of the pitch curve has been divided into equal-length segments by the number of teeth. A master tooth profile, which is a composite curve of circular arcs that represents involute, has been introduced. A noncircular gear pair has been designed by imposing the master tooth on the divided points of the pitch curve, and a full fillet has been achieved between neighbour teeth. Thus, the whole profile of the noncircular gear is a composite curve of arcs only, and consequently NC codes for wire EDM can be easily generated.

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References

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