Patent DE-102009050638-A1 (DE)
Title: Device for laser processing of workpieces, where the focal spot of laser beam is three-dimensionally movable, comprises two reflecting elements by which the laser beam is directed on workpiece surface to be processed after dual reflection
Inventor: BARTELS FLORIAN
IPC: B23K26/10
Filed: 2009-10-20
Abstract: 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. 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[deg] 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.