Patent ID: 7480540
Filing Date: 2009-01-20
Classification: B23Q,G05B,Y10T

Abstract:
1. A method of producing a microstructured surface on a workpiece rotated by a spindle, using a tool driven by an actuator that can be moved in a direction toward the workpiece surface by the actuator and that can be linearly positioned, in a direction perpendicular thereto, along the workpiece surface by a linear drive, the method comprising the following steps: (a) providing a desired microstructure for a workpiece to be worked; (b) transforming the desired microstructure to a file look-up table LUT containing an actuation position in a perpendicular working direction as a function of an angle of rotation of the workpiece and a linear feed travel of the tool along the workpiece surface, for an actuator-controlled feed motion of the tool; (c) performing a spatial frequency analysis of the desired microstructure, and determining a maximum cut-off frequency of a signal for the feed position as a function of the angle of rotation, the linear feed motion of the actuator along the workpiece surface and of the cutting speed; (d) setting cutting speed for the turning operation of the workpiece so that the maximum cut-off frequency of the desired microstructure is lower than the first resonant frequency of the actuator; (e) driving the spindle and said linear drive and producing a microstructure on the workpiece by feeding the tool against the workpiece surface by means of the actuator controlled by actuation values derived from the look-up table as a function of the cutting speed, the angle of rotation and the length of the feed motion of the actuator along the workpiece surface.