Method of ball-rim contact point finding in the ball-bearings

摘要

Finding contact points of balls with a rim is relevant task for ball-bearings manufacturing. Service life of the bearing strongly depends on corresponding parameters. The majority of existing methods is based on measurement of geometrical parameters of balls and of rims rings and selection of the bearings with the best properties. But, practically there are no methods for finding contact points of balls with a rim in already collected bearing. In present paper such a method of ball-rim contact point finding with use of acoustic microscope is proposed. The described method is based on a difference between focused ultrasound reflection factors from free sites of a bearing rim and the points adjoining with balls.