Abstract
Direct Digital Simulation (DDS) method is proposed for geometrical calculation of gear tooth surfaces. It was successfully used for tooth form calculation of the following gears : spiral bevel, hypoid, spiroid, hyperbolic, helical, Wildhaber-Novikov, double enveloping worm, globoid, worm, crown gears and for variable ratio rack. The following DDS software options were tested : tooth geometry, digital master gear, contact pattern, 3D visualization, 3D contact animation, contact stress, gear misalignments, transmission error, export gear geometry in to 3D CAD files, sliding and rolling velocities, gear tooth cutting and grinding, not involute tooth profiles.
