The objective of this paper is to establish procedures and tools to calculate geometrical parameters of spur gears, which may be applied to its recuperation. An indispensable requirement to recover a gear transmission is the possibility to have all geometrical parameters and it's control parameters too. To calculate all geometrical parameters is necessary to know the gear module, the number of teeth, the shift profile factor whether it exist or not and it's value. However it is not possible to know all of these parameters, and p some other times the gear transmissions are designed by the English Standard System, using the diametral or circular pitch as fundamental parameter, that makes impossible to know if the gears are corrected or not. To recover these gears transmissions we have to convert them to the Metric Standard System to determine the equivalent gear module. The Inverse Engineering allows us to look for the solution and to determine the unknown parameters through measurements and known parameters of the gear transmission. The design for recovering spur gear transmission considers the following possibilities: 1. To keep the gear ratio, the number of pinion teeth, the number of the wheel teeth, the center distance, the gear module and introducing shift profile factors (altering standard addendum) to obtain maximum strength for different failures. 2. To keep the gear ratio, the center distance, varying the number of the pinion and wheel teeth and the gear module, introducing shift profile factors to obtain maximum strength. 3. To convert from English Standard to Metric Standard System, keeping the gear ratio and center distance to obtain an approaching gear module to diametral or circular pitch and introducing angular correction to obtain the necessary center distance. It is a very difficult task to develop software using the above-mentioned possibilities. For that reason we applied in our work the Artificial Intelligence and specially the Expert Systems.
展开▼
