Patent ID: 7909676

Claim:
A measuring apparatus for measuring geometrical parameters of cylinders or rolls and operating with an autonomous movement on a machine for the grinding of said cylinders or rollers, wherein said autonomous movement is independent of the translation movement of the grinding wheel or other parts of said grinding machine, said measuring apparatus comprises an independent gauge system that comprises at least four sensors radially positioned on a plane perpendicular with respect to the axis of the cylinder or roll being processed, at least two of said sensors being situated in positions which are diametrically opposite each other, wherein said sensors are positioned on an upper arm and a lower arm which are movable so as to allow said sensors to be orthogonally positioned with respect to the surface of the cylinders or rolls, said upper arm carrying at least three upper sensors which are radially arranged along one and the same support carried by said upper arm and said lower arm carrying at least one lower sensor that is positioned diametrically opposite to at least one of said three upper sensors, and wherein said upper arm and said lower arm are part of a tong-like structure that is assembled on a measuring trolley, said tong-like structure being opened and closed, by the translation and/or rotation of at least one of said upper and lower arms, so as to come into contact with the cylinder or roll during the measuring phase and to allow the loading and/or unloading of the cylinders and rolls.