Abstract
Keywords
Production, Up-to-Date Technologies and Production Processes
Abstract
Curved toothing bevel pinion and gear sets were developed in order to realize gear drives between intersecting axes that include an angle with each other or non-intersecting axes. For the intersecting axes the spiral bevel gears are used, while for the non-intersecting axes the spiral bevel hypoid gears are applied. For more economic production, if ratio allows, FORMATE gear sets are used. As for final machining their toothing can be lapped or ground. The more and more increasing requirements for accuracy and low noise expectations make the ground gear sets more significant. In producing the spiral toothing, lately there have been two prevailing systems that are different both in tooth shape and in forming process: Gleason and Klingelnberg – Oerlikon. In the Gleason-system gears the whole depth is varying in direction of tooth length (is decreasing towards the minor diameter), with circle arch lead; while in the Klingelnberg-types the whole depth is constant and the lead is an arch of epicycloid. As CNC cutting machines are being developed, there is a significant passage developing between the two systems. The current presentation includes development process and means of Gleason-system ground spiral and hypoid gear sets that were developed and are applied by Rába. As a result of this development process, we obtain a gear set condition suitable for serial production. In the current presentation gear set development means a cyclically repetitive – even several times – process, with the following components: designing, production of prototype gear sets as designed, geometrical measurements on toothing of prototype, grinding and kinematical optimization of toothing in prototype, noise and lifetime test of prototype. If the test results are not proper following any step of the development process, by feeding the results back, the development step is repeated when we are only making corrections. When proper noise and lifetime test results are obtained, the development process is finished and preparations are made for serial production.