Robert Boschgmbh

Deutsches Zentrum Fuer Luft-und Raumfahrt E.v

Thilo Henke

Wolfgang Fischer

Reiner Krapf

Ulli Hoffmann

Michael Mahler

Achim Duesselberg

Thomas Winkler

Helge Sprenger

Antoine Vandamme

Juergen Lennartz

Haris Hamedovic

Walter Krenkel

Andreas Strasser

Christian Bertsch

Rainer Nitsche

Matthias Tauber

Gerd Schlesak

Mario Eduardo Vega Zavala

Martin Streichfuss

Percussion unit, especially for a rotary hammer and/or percussion hammer, comprising a control unit which is designed for controlling a pneumatic percussion mechanism. According to the disclosure, the control unit comprises at least one load estimation device.

Percussion unit

Percussion unit, especially for a rotary hammer and/or percussion hammer, comprising a control unit which is designed for open-loop and/or closed loop control of a pneumatic percussion mechanism, and at least one operating condition sensor unit. According to the disclosure, the control unit is designed to detect at least one percussion mechanism parameter depending on measurement values of the operating condition sensor unit.

The present invention relates to a method for making a protective coating containing silicon carbide on at least a portion of the surface of a substrate made from a material with a softening temperature that is above the temperature applied to make the protective coating, where silicon is deposited on the portion of the surface of the substrate and where, under vacuum or in an inert atmosphere, the substrate is heated to a temperature above the melting point of silicon, and the silicon is brought to reaction with carbon that is contained in a porous coating. The surface of the object to be coated is initially provided with a porous carbon coating with an open porosity in a range between 40 and 95%, where said porous carbon coating is covered with a uniform coating of silicon, where the ratio in percent of mass (Ma-%) of the applied silicon to that of the carbon in the porous carbon coating is greater than 2.34, where the substrate is heated to a temperature that is above the melting temperature of the silicon, and that the substrate, provided with the coating that contains silicon carbide and free silicon, is cooled down to room temperature.

Method for making a protective coating containing silicon carbide

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Leinfelden-Echterdingen, Germany

Thilo Henke