Abstract
This paper presents a study on the contact stresses of WN gears. A method for calculating contact stresses of WN gear teeth in mesh was developed. The validity of the method was confirmed by comparing the calculated contact stresses of WN gear teeth in mesh with measured stresses. The contact stresses of WN gears with various dimensions were calculated, and the effects of center distance, helix angle, face width and number of teeth on the maximum contact stresses of WN gear teeth in mesh were clarified to a considerable extent. Furthermore, the contact stresses of WN gear teeth were compared with those of involute helical gear teeth. The maximum contact stress of WN gear teeth was found to increase with increasing center distance and helix angle and with decreasing number of teeth but to be much smaller than that of involute gear teeth in the case of the normal center distance.
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