Abstract
The machining of crown gear rims. applied in tooth clutches for torque transmission, usually is done by milling using the indexing method, involving long machining times and the risk of edge contact. The paper deals with a new hobbing method, that enables an economical manufacture of spirally curved crown gears with conventional spur gear generating machines. In order to optimize the contact characteristic and the tool design, the kinematics of the procedure have been analyzed by computer simulation, so that the shape of the generated teeth is calculable just as well as the chip width and the working clearance angles.
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