重力振子法による歯車対の歯面摩擦係数の高精度測定法

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A new gravity pendulum method has been proposed in order to precisely measure the tooth surface friction coefficient between a mating pair of gears, and the tooth surface friction coefficient measurement apparatus of gravity pendulum type has been produced based on the principle of the method. In the apparatus the center-to-center distance between the pair of gears is kept constant with a flexure hinge mechanism, and the practical rolling and sliding motions between the mating teeth is exactly realized. The tooth friction coefficient is calculated by equating the dissipated potential energy of the gravity pendulum during some free pendulum oscillations with the work done by the friction force between the mating teeth during the oscillations. Since the amplitude of the oscilllation is approximately equal to or less than one arc-degree, the tooth surface friction coefficient can be measured on a small area of the tooth surface. After investigating the influences of the horizontal oscillation of the ground where the measurement apparatus was set and the small clearences in the flexure hinge mechanism on the measurement of the free vibration of the gravity pendulum, the tooth surface friction coefficient was measured for a pair of internal and external gears. As the result it is found that it is required to oscillate the gravity pendulum with an amplitude which is equivalent to or larger than the width of HertzJan contact, thereby obtaining the precise value of tooth surface friction coefficient.
一般社団法人日本機械学会の論文
1998-09-25

重力振子法による歯車対の歯面摩擦係数の高精度測定法

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