Mtu Motoren-und Turbinen-union Muenchen, Gmbh

Mtu Motoren-und Turbinen-union M&uuml;nchen Gmbh

Georg Muschal

Arndt Glaesser

Erich Thaler

Dieter Schneefeld

Karl Katheder

Rupert Stelzer

Peter Metzinger

Reimund Haimerl

A method for producing matched surfaces on rotor units with integral blades comprising a hub and at least one blade ring, by removing by machine after integral joining with component overmeasure in the area of the joining zone, whereby at least one actual surface is acquired by measuring method, and a surface matching it, is produced. Acquisition by measuring method and production take place on a process machine in one clamping of the rotor unit. The desired surface of each processing area is provided in the form of stored data. Starting from at least one measured actual surface, a matched surface is produced beyond the joining zone, with the surface everywhere adjoining the actual surface and/or a so-called repair surface of which there is at least one, without any kinks or steps at a specifiable minimum curvature. As far as is possible, the surface itself corresponds to a mathematically continuous spatial surface comprising a locally and/or direction-dependent variably-specifiable minimum curvature, whereby approximation to the desired profile takes precedence over approximation to the desired position.

Method for producing matched fluid contact surfaces

The invention relates to a friction welding process for mounting blades of a blade carrier (,) of a flow machine as well as a shielding gas shower for supplying gas to welding surfaces. To achieve this, a plurality of longitudinally extending welding surfaces (,) are provided on the circumference of the blade carrier (,), are oriented at a blade angle &bgr; relative to the rotation axis (R) of the blade carrier (,), and are respectively welded together with a welding surface (,) of a blade (,). The welding temperature necessary for joining the bodies (blade carrier (,), blade (,)) is achieved by pressing together the welding surfaces (,) and simultaneous oscillating relative motion (P) of the bodies (,) in the welding plane (E), whereby a shielding gas (S) flows around the welding surfaces (,) during the relative motion (P). The shielding gas flow S follows the contour of the blade carrier and the blade and thus serves to provide a closed shielding gas curtain for protecting the welding surface. In order to ensure a gas supply to the welding surfaces from all sides to the extent possible during the relative motion, the shielding gas shower, which is stationary relative to one of the bodies, comprises a gas outlet opening facing the welding surfaces.

Friction welding process and shielding gas shower for carrying out the process

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Erding, Germany

Georg Muschal