LASER MACHINING HEAD FOR MACHINING A WORK PIECE BY MEANS OF A LASER BEAM, SAID LASER MACHINING HEAD HAVING A HOUSING THAT IS CONNECTED THERETO IN A DETACHABLE FASHION, RECEIVING DEVICE AND NOZZLE; NOZZLE ELEMENT HAVING A ROUNDED OFF TAPERED SECTION; RECEIVING DEVICE

摘要

The invention relates to a laser machining head (10) for machining a work piece (12) by means of a laser beam, comprising a housing (18) through which a beam path (4) for a laser beam is guided that, along with a process gas, escapes from a housing exit opening (44) facing the work piece, a receiving device (22) connected in a detachable fashion to the housing and having a through channel (20) for the process gas and the laser beam with a channel entrance opening facing away from the work piece and a channel exit opening (68) facing the work piece, wherein the channel entrance opening is connected to the housing exit opening, and a nozzle (30) that is connected to the receiving device in a detachable fashion and has a nozzle entrance opening (70) connected to the channel exit opening and a nozzle opening (32) facing the workpiece through which nozzle opening the process gas and the laser beam escape when the processing head is in operation. In order to allow the machining of a work piece (12) by means of a laser beam at a reduced process gas pressure with equal or greater quality, at least one of the transitions from the housing exit opening to the channel entrance opening of the receiving device and from the channel exit opening of the receiving device to the nozzle entrance opening is continuous.