Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.

Rheinisch-westfaelische Technische Hochschule Aachen

Thyssenkrupp Drauz Nothelfer Gmbh

Thyssen Laser-technik Gmbh

Rheinisch-westfalische Technische Hochschule Aachen

Stefan Kaierle

Wolfgang Schulz

Peter Abels

Boris Regaard

Jan Michel

Gerhard Alber

Dirk Petring

Reinhart Poprawe

Friedrich Behr

Christian Kratzsch

Jörg Neubert

Anas Moalem

This invention relates to a method for cutting materials using a laser beam, which emerges from a cutting head comprising a cutting nozzle with an inner edge, and is absorbed by the cutting front. The axis of the laser beam is displaced in relation to a workpiece along a cutting line with a fixed orientation in the cutting direction of said workpiece. In this method the position (p) of the cutting head is modulated with regard to its time averaged value, or the laser power and gas pressure in the cutting head are modulated.

Method for cutting materials using a laser beam

The present invention relates to a method and a device for the machining of an object using a tool, in which the tool () or the object () is guided using a handling apparatus, which has multiple movement axes for the coarse positioning of the tool () or object (), which form a kinematic chain. In the method, an additional actuator (), which has a higher positioning precision in at least one dimension or axis than the other movement axes, is inserted between a terminal link () of the kinematic chain and the tool () or object (). A relative movement of the tool () or terminal link () of the kinematic chain to the object () is detected using at least one sensor () and a deviation from a target movement path is compensated for using the additional actuator (). The method and the associated device allow the use of robots or other handling apparatuses having lower path precision for applications which require a high precision during the guiding of the tool.

Method and device for fine positioning of a tool having a handling apparatus

The present invention relates to a method for measuring phase boundaries of a material during the machining of a workpiece () with a machining beam, more preferably with a laser beam, and a device that is embodied in such a way as to carry out the method. According to said method, during the machining, a machining region () containing the impact point of the machining beam () on the workpiece () is illuminated at least approximately coaxially to the machining beam () by means of additional optical radiation (). Radiation () reflected by the machining region () is detected, parallel to an incidence direction of the optical radiation () or at small angle thereto, by means of an optical detector with local resolution, in order to obtain an optical reflection pattern of the machining region (). From the optical reflection pattern, a course of at least one liquid/solid phase boundary in the machining region () is then determined in an automated manner by means of an image processing algorithm on the basis of a transition from an area containing a large-surface homogeneous area and an area containing a plurality of small-surface homogeneous areas in the optical reflection pattern.

Method for measuring phase boundaries of a material during machining with a machining beam using additional illumination radiation and an automated image processing algorithm, and associated device

In a method for cutting structural components to be joined by laser radiation that is guided by a computer-controlled manipulation system provided with a nominal path for each structural component corresponding to a joining line that is curved as a result of at least one of the structural components being three-dimensionally shaped, the structural component surfaces of the structural components including the joining line are determined measuring technologically. Based on measuring results, the nominal path corresponding to a penetration line of the structural components to be joined is calculated. A marking is formed on a first one of the structural component surfaces. When performing the cut on the structural component surface provided with the marking, the resulting cutting gap and the marking are determining measuring technologically. When a deviation of the cutting gap from the nominal path is detected, the manipulation system is controlled to correct the deviation.

Method for laser-cutting structural components to be joined

A method for processing workpieces by means of high-energy radiation, wherein the radiation is focused by a processing optic onto a processing site. The light radiation emanating form the workpiece is received by the same processing optic and is analyzed by a detector. An optical measurement with respect to the surface of the workpiece is performed in a processing area of the workpiece by means of an external source of measuring light, utilizing measuring light reflected from the processing area. The same processing optic is used to focus radiation onto the processing site and to receive radiation emanating from the workpiece at the processing site.

Method and device for machining workpieces using high-energy radiation

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Herzogenrath, Germany

Stefan Kaierle