Patent ID: 7014082
Filing Date: 2006-03-21
Classification: B23K,C03B,Y10T

Abstract:
1. A device for cutting flat work pieces made of a brittle material, said device comprising: means for moving a linear focal point of a focused laser beam along a dividing line on a work piece, said dividing line having a specific contour; means for moving a cold spot along said dividing line following said linear focal point; means for scanning said laser beam in an oscillatory manner, so that the linear focal point is produced on the dividing line on the work piece, said means for scanning comprising an optical system with a scanner; means for providing trajectory data regarding a course and the specific contour of the dividing line from a numerical trajectory control device to a profile control device that specifies a curvature and a length of the linear focal point and to an actuating means that specifies a position of the linear focal point on the dividing line; means for controlling the curvature of the linear focal paint with the profile control device during the scanning so that all points of the linear focal point lie on or coincide with the dividing line; and means for adjusting a scanning amplitude so as to adjust the length of said linear focal point as a function of the specified contour of the dividing line.