Wieland-werke Ag

Robert Kloeckler

Manfred Knab

Gerhard Schuez

Isabell Buresch

Andreas Boegel

Karl-Hermann Stahl

Eberhard Lepin

Hans-Juergen Stoeckl

Heinz-Ulrich Koboecken

A band-shaped semi-finished product is made out of a ductile material and is configured to be separated into at least two sections. At least one pair of wedge-shaped, non-cuttingly formed longitudinal notches are formed, between the tips of which there remains a thin web of material, which can be torn easily with little force. The semi-finished product is distinguished by burr-free separated edges, defined geometry of the separating surfaces, and extremely reduced breaking-surface portions. It shows improved resistance during static and dynamic stress, in particular for alternating bending loads, in comparison to conventional, for example via the rolling-cutting technique, separated semi-finished products.

Semi-finished product made out of a ductile material with breaking areas

The invention relates to a metallic heat-exchanger tube (1) with fins (2) which annularly or helically extend or rather extend in axial direction on the outside of the tube for condensing of vapor from pure substances or mixtures on the outside of the tube. To improve the condensation performance by effecting a thinning of a liquid film, the invention includes a making of the fins so that they have a constant fin height H throughout, with the fin flanks (4) being structured by spaced-apart depressions.

Heat-exchanger tube for condensing of vapor

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Tiefenbach, Germany

Robert Kloeckler