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Computer aided design and analysis of gear tooth geometry

S. H. Chang, Ronald L. Huston

Abstract

A simulation method for gear hobbing and shaping of straight and spiral bevel gears is presented. The method is based upon an enveloping theory for gear tooth profile generation. The procedure is applicable in the computer aided design of standard and nonstandard tooth forms. An inverse procedure for finding a conjugate gear tooth profile is presented for arbitrary cutter geometry. The kinematic relations for the tooth surfaces of straight and spiral bevel gears are proposed. The tooth surface equations for these gears are formulated in a manner suitable for their automated numerical development and solution.

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Key concepts: Bevel gear, Tooth surface, Hobbing, Spiral bevel gear, Gear tooth, Kinematics, Spiral (railway), Engineering