Abstract: An automatic programming apparatus is provided to generate a NC program for processing a roll having a cylindrical part and axle parts. The apparatus includes a roll-profile setting module, a process-condition setting module, a process-order setting module and an automatic programming module. The roll-profile setting module establishes dimensional values of the roll between an operator and the apparatus at every locational code, while the process-condition setting module establishes a plurality of process conditions at every process code, interactively. The process-order setting module combines the locational codes with the process codes at every process order, optionally and interactively, so that the process order of the cylindrical part and the axle parts is set while allocating any one of the process conditions.

Abstract: A method of measuring a roll diameter of a roll is provided. At first, a step-shaped conical master roll consisting of a plurality of diametrical parts is prepared and then, the diameters of the diametrical parts under predetermined standard temperature are measured. After mounting the master roll 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.