Abstract
A method is shown to estimate the degree of vibrational excitation of involute helical gears due to transverse and longitudinal tooth form errors and periodical change of tooth stiffness with progress of meshing. Some charts and a table are shown to give the results of this analysis for the combinations of four gear pairs of different dimensions and four different kinds of tooth form errors. The analysis shows, that the convex tooth form error is the most harmless among different kinds of tooth form error shapes such as concave, waving tooth form error, pressure angle error and so on. The effect of convex tooth form correction for helical gears is recognized the same as the case for spur gears. With increase of total contact ratio or of helix angle, the magnitude of vibrational excitation becomes strongly weakened.
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