COMPUTER AIDED MANUFACTURING OF SPIRAL BEVEL GEARS

Abstract

The spiral bevel gear has the best qualification when comparing with the others of gears. However, Spiral bevel Gear up to now was still manufactured by specific machines where the combination of envelop motions to create the tooth surface of Spiral bevel gear is usually complicated. Therefore, the gear surface quality is usually not accurate, not stabilized and high cost. This study aims to apply of CAD technologies into the metal cutting field. Especially, the tendency of using CNC (Computer Numerical Controller) machine on manufacturing Spiral bevel Gear is the best solution which can satisfy most of the required specifications of spiral bevel gears. Otherwise, the most significance is to increase the quality of spiral bevel gears and to simplify enormously the machine toll for making them. In order to be able to machine spiral bevel gears on CNC machine, a five axis CNC machine with 5D contouring control is required. A CAD/CAM system with 5 axis tool path generation capabilities is necessary and a standard postprocessor is also required. The most significant problem of using CAD technology and CNC machine to made Spiral bevel is that we can use the output file from the Postprocessing of CNC machine in checking model, diagnosing errors, simulating and measuring the surface quality of a pair meshing Spiral bevel gear.