Daimler Chrysler Ag

Daimler Ag

Markus Beck

Axel Giering

Wolfgang Becker

Klaus Goth

Peter Linden

Claus-Dieter Reiniger

Jochen Bahnmueller

Tilmann Haug

Patrick Izquierdo

Harald Pfeffinger

Daniel Zauner

Michael Lahres

Mike Paelmer

Steffen Dingfelder

Matthias Merkel

Karl-Heinz Fueller

Thomas Herzinger

Oliver Roecker

Oliver Quirin

Berthold Hopf

Wolfgang Gref

Ulix Goettsch

Jochen Bahnm&uuml;ller

Markus Geyer

A method for welding two metal parts from aluminum alloys with the steps:

Method for welding two metal parts and connecting arrangement with two metal components

A side wall for a motor vehicle has an inside shell made of steel plate and an outside covering connected with (particularly welded to) the inside shell. The outside covering comprises an inside panel made of a steel alloy and an outside panel.

Sidewall for a motor vehicle

When laser beam welding one or more work pieces faults may occur, which lead to unacceptable losses in quality. A check process is provided, which reliably recognizes seam faults in a seam which is introduced into one or more workpieces by means of laser beam welding. Characteristic signals are detected from the region of the seam using a sensor and compared with an index value or set value, and only signals are taken into consideration which are detected in a characteristic time interval following the laser beam welding, which begins, at the earliest, following the solidification of the seam.

Process for checking a laser weld seam

During laser beam welding a so-called end crater forms at the end of the weld seam. The end crater is formed by the volume shrinkage of the solidifying melt after the laser beam reaches the seam end and is switched off or repositioned. The end crater acts as a geometric notch and decreases the mechanical characteristics, in particular the operational stability, of the weld seam so that holes or tears in the area of the end crater can occur. The task of the present invention is thus comprised of providing a process for reducing end crater formation. The task is solved in that towards the seam end the focus of the laser beam is distanced from the surface to be welded and/or a transverse movement of the beam occurs.

Process for laser beam welding with reduced formation of end craters

A method for surface working a tribological coating of a supereutectic aluminum-silicon alloy or an aluminum-silicon composite material with a coating structure includes machining the surface dry, without lubricant, in a one-step process, with a cutting tool having a cutting material containing diamond. The surface treating may be followed by a one-step finish honing or one-step texturing process.

Method for the surface treatment of a tribological coating

A process and device are disclosed for fine and micro-machining workpieces by means of laser beams. The process is conducted in several stages and the device has a modular design. The process and device make it possible to generate highly uniform cut seams or grooves, to set the required conicity, to work in a highly accurate and reproducible manner and give a great freedom of design during machining.

Fine and micro-machining process for workpieces by means of laser beams

A method and system for monitoring and documenting a laser machining operation is provided. A measuring beam is generated which is correlated with the laser beam and which is deflected as partial beams transversely to its initial propagation direction. The partial beams are locally mutually separated. The distributions of the energy field density of the deflected partial beams of the measuring beam are measured.

Method and system for monitoring and/or documenting a laser machining operation

A method and system for measuring the distribution of the energy field density of a laser beam is provided. Laser pulses of the laser beam are extracted in groups or individually from the laser beam, are locally separated from one another, and the respective distribution of the energy field density of the deflected and locally separated individual laser pulses is measured.

Method and system for measuring the distribution of the energy field density of a laser beam

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Elchingen, Germany

Markus Beck