Helmholtz-Zentrum Geesthacht Zentrum Fur Material Und Kustenforschung Gmbh

Linde Aktiengesellschaft

Gkss-Forschungszentrum Geesthacht Gmbh

Helmholtz-Zentrum Hereon Gmbh

Arne Roos

Jorge F Dos Santos

Luciano Bergmann

Jorge Fernandez Dos Santos

Georg Wimmer

Henry Loitz

Jan Fritz

Shahram Sheikhi

Dos Santos

Rudolph Zettler

A device for depositing a material layer on a surface of a workpiece has a deposition facility with a hollow shoulder that is rotatable about an axis relative to a base. The shoulder has an indentation that is limited by a circumferential annular face. A passage opening, which is smaller in diameter than the indentation, is formed in the shoulder along the axis. The shoulder is rotated and a deposition material is fed through the passage opening into the indentation where it is plasticized in the indentation. The deposition facility is moved over the surface in such a way that the indentation points towards the surface and a workpiece plane runs tangentially to the surface at the point at which the axis intersects the surface. The annular face is distanced from the surface such that plasticized deposition material is deposited on the surface. A related deposition method is also provided.

Device and method for the deposition of a material layer on a surface area of a workpiece

A friction welding tool having a pin and a clamping device with a counter bearing, a holddown element and a spring element. The pin has a coupling section for releasable, rotationally fixed coupling to a rotating output device of a machine tool. The counter bearing is held on the pin between the pin's coupling and engagement ends in a manner that allows the counter bearing to be axially immovable on but freely rotatable about a longitudinal axis of the pin. The holddown element surrounds the pin and is arranged on a side of the counter bearing facing the engagement end. The holddown element has a bearing surface for bearing on the workpiece arrangement. The spring element is provided between the holddown element and the counter bearing and is mounted on the pin in such a way that it is elastically slidable along the longitudinal axis of the pin.

Friction stir welding tool

The invention relates to a method for the joining of tube plates () and tubes () in a tube bundle heat transfer device with the help of a rotating friction tool. Here, the friction tool is rotatingly moved into the open end of a tube () surrounded by the tube plate () in the axial direction of said tube and pressed against the face of the tube () in the manner that the tube end () and the region of the tube plate () surrounding the tube end are plasticized and merge into a weld joint.

Method for joining tube plates and tubes as well as friction tool to carry out the method

The present invention relates to a method for producing a welded connection between a first workpiece and a second workpiece comprising the following steps: providing a first workpiece and a second workpiece, arranging the second workpiece on a surface of the first workpiece, placing a friction tool by the friction area thereof onto that surface of the second workpiece which is remote from the first workpiece, and rotating the friction tool, with the result that a welded connection is formed between the first workpiece and the second workpiece, the friction area rubbing on that surface of the second workpiece which is remote from the first workpiece, and the contact region between the friction area and the second workpiece running completely in that surface of the second workpiece which is remote from the first workpiece.

Method and apparatus of producing a welded connection between the surfaces of two planar workpieces

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Juliusburg, Germany

Arne Roos