Transmission Errors and Noise of Spur Gears Having Uneven Tooth Profile Errors

The problems of involute spur gear noise and transmission errors are studied by meshing m3, 40z spur gears. Five kinds of tooth profile errors, such as convex, concave and wave-like, were formed on the test gear teeth by grinding. The value of each tooth profile error is divided into 3 grades, according to the Gear standards of JIS. Transmission errors of 15 test gears and a master gear were measured by a single flank gear rolling tester with a planetary gear system. Gear noise and strains near tooth fillets were measured by running these test gears on a gear noise testing machine with a power absorbing system, in an anechoic room. This paper presents experimental results and studies of the influence of tooth profile error forms on single flank rolling errors, situation of tooth contacts and gear noise while running.