Witzig & Frank Gmbh

Mag Ias Gmbh

Walter Viegner, Jr

Walter Bauer

In a method for producing a coupling on a pipe, preferably consisting of copper or steel or Cu&#x2014;, Ni&#x2014;, Fe&#x2014; alloys, by way of a preferably graduated or one-stage expansion of the pipe end to create a much larger difference in diameter, an expansion tool is introduced axially into the end of the pipe. Once the expansion tool has been introduced into the pipe end, the region of the pipe end that is to be or has been expanded is completely or partially compressed, by a force acting axially on the pipe end, so that the external diameter of the pipe end that is to be processed is delimited by one or more shaping jaws that completely or partially surround the pipe end. The invention also relates to a device for producing a coupling on a pipe end according to the method.

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Attendorn, Germany

Walter Viegner, Jr