Precitec Gmbh & Co. Kg

Siemens Aktiengesellschaft

Precitec Optronik Gmbh

Precitec Kg

Precitec Itm Gmbh

Precitec Itm Gmbh & Co. Kg

Thibault Bautze

Markus Kogel-Hollacher

Martin Schönleber

Rüdiger Moser

Ingo Stork Genannt Wersborg

Henning Hanebuth

Martin Schoenleber

Daniel Regulin

Christian Staudenmaier

Heinz-Ingo Schneider

Christian Fraas

Martin Schonleber

Rudiger Moser

The invention relates to a device () for an additive manufacture. The device () comprises a laser device () for machining material using a laser beam (), said laser device () being designed to deflect the laser beam () onto a machining region of a workpiece (); at least one supply device () for a supply material, said supply device being designed to supply the supply material to the machining region; and an interferometer () which is designed to measure a distance to the workpiece () by means of an optical measuring beam ().

Apparatus and method for additive manufacturing

A device for measuring the depth of a weld seam in real time during the welding or joining of a workpiece by means of radiation, including: its measuring light source, the light of which is coupled by a beam splitter into a reference arm and a measuring arm; a collimator module having at least one collimation lens for collimating a measuring light beam, which is fed to the collimator module via an optical waveguide in the measuring arm, and for imaging the measuring light beam, which is reflected from a workpiece to be processed, on an exit/entry surface of the optical waveguide; a coupling element for coupling the measuring light beam into the beam path of a processing beam; a focusing lens for the joint focusing of the measuring light beam and the processing beam on the workpiece and for the collimating of the reflected measuring light beam; and an analysis unit for determining the depth of a weld seam, into which the measuring light reflected from the workpiece is guided with the superimposed, reflected light from the reference arm. The collimator module includes a device for setting the axial focal position of the measuring light beam, and for setting the lateral focal position of the measuring light beam, and a field lens, which is arranged between the exit/entry surface of the optical waveguide and the collimation lens and defines the beam widening of the measuring light beam and therefore the focus diameter of the measuring light beam.

Device for measuring the depth of a weld seam in real time

According to a method for measuring the distance between a workpiece and a machining head of a laser machining apparatus, a machining head is provided, which has a housing that has an interior and an opening for emergence of the laser radiation from the machining head. The laser radiation is directed on to the workpiece, after it has passed through the interior and the opening. An object beam is directed on to the workpiece by a light source of an optical coherence tomograph in such a manner that the object beam passes through the interior and the opening before being incident upon the workpiece. In addition to the object beam, a measuring beam passes through the interior. The measuring beam is used to compensate falsifications of the measured distance that have been caused by pressure fluctuations in the interior. The measuring beam in this case may be reflected at a reflective face that is formed on an inner face of an outlet nozzle that comprises the opening, which inner face delimits the interior.

Method for measuring the distance between a workpiece and a machining head of a laser machining apparatus

The present invention relates to a method for closed-loop controlling a processing operation of a workpiece, comprising the steps of: (a) recording a pixel image at an initial time point of an interaction zone by means of a camera, wherein the workpiece is processed using an actuator having an initial actuator value; (b) converting the pixel image into a pixel vector; (c) representing the pixel vector by a sum of predetermined pixel mappings each multiplied by a corresponding feature value; (d) classifying the set of feature values on the basis of learned feature values into at least two classes of a group of classes comprising a first class of a too high actuator value, a second class of a sufficient actuator value and a third class of a too low actuator value at the initial time point; (e) performing a control step for adapting the actuator value by minimizing the error ebetween a quality indicator yand a desired value; and (f) repeating the steps (a) to (e) for further time points to perform a closed-loop controlled processing operation.

Method for closed-loop controlling a laser processing operation and laser material processing head using the same

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Karlsruhe, Germany

Thibault Bautze