Mechanical device for assembling and/or disassembling a laser nozzle and laser processing machine with such a device

The mechanical device (1) comprises a feed drive and/or a mounting-/demounting drive, and a tool tip-/nozzle changing mechanism having a nozzle holder support (7) revolving around a rotation axis. By the feed drive, the nozzle holder support delivers a nozzle magazine (6) jointly with a nozzle holder (10) equipped on the nozzle holder support for the laser nozzle. The nozzle holder moves in a mounting-/demounting position so that the mounting-/demounting drive rotates the nozzle holder with a mounting-/demounting movement around a nozzle holder rotation axis. The mechanical device (1) comprises a feed drive and/or a mounting-/demounting drive, and a tool tip-/nozzle changing mechanism having a nozzle holder support (7) revolving around a rotation axis. By the feed drive, the nozzle holder support delivers a nozzle magazine (6) jointly with a nozzle holder (10) equipped on the nozzle holder support for the laser nozzle. The nozzle holder moves in a mounting-/demounting position so that the mounting-/demounting drive rotates the nozzle holder with a mounting-/demounting movement around a nozzle holder rotation axis. The nozzle holder support is equipped with a number of nozzle holders that are separated from the rotation axis of the nozzle holder support in radial direction of the rotation axis. A robot arm equipped with the tool tip/nozzle moves itself for demounting the tool tip/nozzle to a nozzle holder of the nozzle holder support and sets the tool tip/nozzle to be changed in the nozzle holder. The tool tip/nozzle is fixed in the interior of the nozzle holder in such a way that it moves itself not relative to the nozzle holder. The nozzle holder equipped with the tool tip/nozzle is present itself in the demounting position. The robot arm rotates the nozzle holder together with the nozzle holder support by the demounting position and the tool tip/nozzle is fixed in the interior of the nozzle holder around the rotation axis of the nozzle holder support. The rotation of the nozzle holder causes a demounting movement of the tool tip/nozzle fixed in the nozzle holder based on its eccentric arrangement at the nozzle holder support. The robot arm moves itself to the relevant nozzle holder on the nozzle holder support. The nozzle holder support and the nozzle holder eccentrically arranged in the support and equipped with the tool tip/nozzle to be mounted are arranged by a rotation caused by the robot arm. The nozzle holder is delivered in a mounting-/demounting