DEVICE MEASURING DIAMETER OF HOLE BY ROLLING Russian patent published in 1996 - IPC

FIELD: measurement technology. SUBSTANCE: device measuring diameter by rolling has base carrying drive with shaft and transducer of linear movements, measuring roller, carrier put on shaft with clearance, spring-loaded small ball mounted on carrier interacting with measuring roller, means of displacement of carrier anchored on base. Measuring roller is inserted into hole of measured part. Carrier is displaced relative to base by means of displacement roller in this case, is pressed against surface of measured hole and is based on it. Carrier rolled by drive forces measuring roller to roll over surface of measured hole. Transducer measures span of radial beats during rolling. Sought size is determined as sum of this span and diameter of measuring roller. EFFECT: increased accuracy of measurements, expanded functional capabilities.