Abstract: Aimed at the problem that the parts of category of paper-cutting roller with face cutter are easy to be deformed during their machining process, the effects of self-gravity, cutting forces and cutting heat on the deformation are analyzed. A method for machining this type of roller with obviously smaller deformation is proposed. This method is realized on the basis of determination of the clamping, feeding and supporting modes of the workpiece of the roller. The key of this method is as follows: both left and right ends of the roller are clamped with chucks, the feeding mode is so selected that the turning is reversed and left to right, and meantime, a movable auxiliary support is set additionally between the left and right side of the machine tool, which can be moved according to the need of the machining process. Based on the ABAQUS, the deformation of the roller at different span wise position and with different stiffness is analyzed, the displacement deformation under the condition of double-auxiliary support and single-auxiliary support is compared simulatively. It is verified that the machining method of the roller with single-auxiliary support can achieve the result with double-auxiliary support, the material will be saved and the cost reduced.

Key words: shaft of paper-cutting roller with face-cutter, machining method, auxiliary support