Centre National De La Recherche Scientifique

Ecole Normale Superieure De Cachan

Cnam-conservatoire National Des Arts Et Metiers

Conservatoire National Des Arts Et Metiers (cnam)

Borghi Saveri France

Ecole Normale Superieure De Cachan (lesir)

Conservatoire National Des Arts Et Metiers

Laurent Prevond

Pierre Francois

Renaud Caplain

Nicolas Collard

Daniel Drecq

Michel Lecrivain

Bernard Multon

Jean Lucidarme

Hamid Ben Ahmed

Antoine Lesobre

Georges Descombes

A method for manufacturing a metal assembly including an aluminum sheet and at least one metal sheet. An aluminum sheet is treated by heating to a temperature of between 80% and 100% of the melting temperature of the material of which it is comprised for a sufficiently long duration to create and stabilize an alpha alumina layer at the surface of the aluminum sheet. The sheet is then cooled. A metal sheet having a ductility less than or equal to the ductility of the aluminum sheet after cooling is provided, which has surface irregularities having a depth greater than or equal to the thickness of the alpha alumina layer. The aluminum sheet and the metal sheet are roll bonded in a rolling mill to produce the metal assembly, wherein the rolling mill includes at least one cylinder, the outer rolling surface of which is provided with raised portions.

Method for manufacturing a metal assembly having a sheet of thermally treated aluminum to obtain alpha alumina and another sheet having surface irregularities that become embedded in said surface during roll bonding

The invention relates to a method for manufacturing an aluminum/metal assembly including the steps involving: thermally processing an aluminum sheet by heating said sheet to a temperature of between 80% and 100% of the melting temperature of the material of which it consists for a sufficiently long duration to create and stabilize by allotropic conversion an alpha alumina layer at the surface of said aluminum sheet, and then cooling same; providing a metal layer having a ductility less than or equal to the ductility of the aluminum sheet after cooling, said layer having surface irregularities having a depth greater than or equal to the thickness of the alpha alumina layer; and roll bonding the aluminum layer and the metal layer to produce the metal assembly.

Method for manufacturing a metal assembly

The invention relates to a method for manufacturing an aluminum/metal assembly consisting of a metal layer made of a first metal on the surface of a metal object made of a second metal, the first or second metal being aluminum, wherein said method includes the following steps: placing a metal foam having an open porosity on a surface of the metal object, and applying mechanical stress to the metal foam in such a manner that said foam becomes embedded in the surface of the object.

The invention concerns a reciprocating linear movement power unit. The powering element consists of a Stirling heat engine and the generator consists of a piston () and displacers () of the heat engine acting as rotors and fixed electromagnetic elements () acting as stator. The Stirling engine comprises in a single working chamber () at least a piston () and two displacers () such that the assembly is equivalent to two engines working in opposition. The power stroke of one corresponds to the resisting stroke of the other. Preferably, the generator is of the asynchronous type, but it can consist of synchronous assemblies, with variable reluctance or with permanent magnets.

Power unit with reciprocating linear movement based on stirling motor, and method used in said power plant

A load machine for a combustion engine test bench includes at least one eddy-current brake associated with at least one electric drive. The brake includes a toothed ferromagnetic rotor secured to a shaft mounted so that it can rotate through a casing containing at least one induction coil borne by an internal peripheral region of the casing, so as to generate a magnetic field across which the rotor is intended to pass in order to generate eddy currents which brake the rotation of the shaft. The shaft is coupled to the combustion engine to be tested, and the electric drive is a variable-reluctance electric motor.

Load machine for a combustion engine test bench

Electromechanical converter device, producing linear motion

Growing community of inventors

Villeparisis, France

Laurent Prevond