Patent ID: 7223936
Filing Date: 2007-05-29
Classification: B23K,C03B

Abstract:
1. An arrangement for severing a flat workpiece of brittle material multiple times along severing lines oriented in the same direction by inducing thermomechanical stresses by a laser, comprising: a laser head by which a laser beam is directed to a workpiece; means for the orientation, positioning, and relative movement between the laser head and the workpiece along a severing line; means for applying a coolant jet to the workpiece along the severing line; and a control device for controlling the course of the process; said means for applying the coolant jet further comprising two coolant nozzles whose axes determine the direction of the coolant jet, which axes together with the axis of the laser head determining the beam direction of the laser beam and lie in a plane (work plane) extending through the severing line; said axes of the coolant nozzles being arranged at an offset by 180° relative to one another at the same distance from and at the same inclination to the axis of the laser head; and said control device being designed in such a way that a coolant jet can be directed to the workpiece selectively by one coolant nozzle or the other coolant nozzle in order to carry out cuts in different directions.