Method and device for cutting a flat workpiece that consists of a brittle material

摘要

An arrangement for cutting a flat workpiece includes a drive unit for generating a relative movement between the focused laser beam ( 2 ) and the workpiece ( 1 ). The laser beam induces a thermomechanical stress in the workpiece along the cutting line. A scoring tool ( 7 ) generates an initial score at the start of the cutting line. A "flying" scoring is provided wherein a unit ( 5, 6, 8 ) moves the scoring tool ( 7 ). The unit is coupled in a controlled manner to the cutting movement of the laser beam ( 2 ) so that the scoring tool ( 7 ) can be brought into a short-time scoring working engagement with the workpiece ( 1 ) at the start of the cutting movement.