Method of and instrument for measuring roll diameter in roll grinder

摘要

A method and an apparatus for measuring a roll diameter of a roll is provided. At first, a step-shaped conical master roll 33 consisting of a plurality of diametrical parts 33a, 33b ... is prepared and then, the diameters of the diametrical parts 33a, 33b ... under predetermined standard temperature are measured. After mounting the master roll 33 on a roll grinder under a temperature condition similar to that surrounding the roll mounted on the roll grinder, a diameter of one diametrical part, of which standard diameter is closest to the roll diameter of the roll, is measured. Next, a difference between the diameter value of the diametrical part and the standard diameter value is calculated as a correction value, so that the roll diameter value of the roll is corrected by the correction value. <IMAGE>