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Title
Vorrichtung zur Laserbearbeitung von Werkstuecken
Date Issued
2009
Author(s)
Bartels, F.
Morgenthal, L.
Wetzig, A.
Patent No
102009050638
Abstract
(A1) Die Erfindung betrifft eine Vorrichtung zur Laserbearbeitung von Werkstuecken, bei der der Brennfleck eines Laserstrahls ueber die zu bearbeitende Werkstueckoberflaeche bewegt werden soll. Fuer eine solche Bearbeitung, die insbesondere ein Schneiden von Werkstuecken sein kann, sind hohe Bearbeitungsgeschwindigkeiten gewuenscht, um die erforderliche Bearbeitungszeit zu verkuerzen. Bei der Erfindung ist der Brennfleck eines Laserstrahls mindestens zweidimensional bewegbar. Dabei kann der Laserstrahl mit zwei reflektierenden Elementen auf eine zu bearbeitende Werkstueckoberflaeche nach zweifacher Reflexion gerichtet werden. Die beiden reflektierenden Elemente sind an zwei Traegerelementen befestigt und um die optische Achse des auf das erste reflektierende Element auftreffenden Laserstrahls drehbar. Die beiden Traegerelemente sind mittels mindestens eines Fuehrungsstabs miteinander verbunden und der Abstand der reflektierenden Elemente kann in der Laengsachsrichtung des Fuehrungsstabes veraendert werden. Ausserdem ist mindestens ein Antrieb fuer eine gemeinsame Rotation der reflektierenden Elemente mit dem jeweiligen Traegerelement und fuer die Abstandsaenderung der reflektierenden Elemente zueinander an der Vorrichtung vorhanden.
DE 102009050638 A1 UPAB: 20110503 NOVELTY - The device for laser processing of workpieces, where the focal spot of a laser beam (1) is three-dimensionally movable, comprises two reflecting elements (2, 3) by which the laser beam is directed on a workpiece surface to be processed after dual reflection. The reflecting elements are mounted on two carrier elements (2.1, 3.1) and are rotatable to the optical axis of the laser beam hitting on the first reflecting element. The carrier elements are connected by a guide rod (4) and the interval of the reflecting elements is changeable in longitudinal direction of the guide rod. DETAILED DESCRIPTION - The device for laser processing of workpieces, where the focal spot of a laser beam (1) is three-dimensionally movable, comprises two reflecting elements (2, 3) by which the laser beam is directed on a workpiece surface to be processed after dual reflection. The reflecting elements are mounted on two carrier elements (2.1, 3.1) and are rotatable to the optical axis of the laser beam hitting on the first reflecting element. The carrier elements are connected by a guide rod (4) and the interval of the reflecting elements is changeable in longitudinal direction of the guide rod. A drive is provided for a common rotation of the reflecting elements with the respective carrier elements and for the interval change of the reflecting elements on the device. The drive for the common rotation and/or translatoric movement grips on carrier element of the second reflecting elements. The guide rod is fixed on one of the carrier elements in its longitudinal direction and is arranged on another carrier element in a longitudinal guidance (5). The carrier element of the second reflecting element is movable in longitudinal axis of the laser beam directed on the workpiece surface and reflecting elements and the guide rod and/or the longitudinal guidance are pivotably arranged vertically to longitudinal axis of the laser beam directed on the workpiece surface. On the reflecting elements, a rotation drive is arranged by which an angle is pivotable that corresponds to 0.5 times of the angle by which the guidance rod is directed to 90 degrees to longitudinal axis of the laser beam directed on the workpiece surface. The drive is formed as gear-, frame- or friction gear, where an edge is connected with the respective carrier element and the other edge is connected with the rotation shaft of the respective reflecting elements. The drive is formed as double cross slide for a two-dimensional movement of the focal point of the laser beam, and for a three-dimensional deflection in the form of a tripod mechanic. The first carrier element is rotatable to the optical axis of the laser beam hitting on its reflecting element and is fixed for other movement. The guidance rod comprises a cross-section with a guide contour and a guidance contour complementary to the longitudinal guidance is present that forms a twist protection. USE - Device useful for laser processing of workpieces. ADVANTAGE - The device ensures rapid laser processing of workpieces with high processing speed and good quality.
Language
de
Patenprio
DE 102009050638 A: 20091020