Thyssenkrupp Stahl Ag

Thomas Neuhausmann

Thomas Flehmig

Martin Kibben

Klaus Bl&uuml;mel

Uwe Kneiphoff

A bending device is described for thin-walled metal tubes (R) made of a straight tube guide (), a core template (), which adjoins the tube guide () and is pivotable in relation thereto, having a connection strip (), and a mandrel, having a mandrel tip (), which is flexible in the region of the core template (), and a mandrel shaft (), which adjoins the mandrel tip () and is rigidly connected thereto and is axially fixed () in the tube guide. In order to support the metal tube (R) to be bent over its entire surface on the inside in the active bending region during the bending procedure, the flexible mandrel tip (), which comprises a radially incompressible solid cylinder made of elastomer, extends only over the starting section of the bending curve, where the bending procedure occurs. In order to pull the metal tube (R) to be bent over this mandrel tip (), the tube is clamped in the region of the core template () for a short length using a spherical clamping head () insertable in the metal tube (R), the clamping head () being movable in relation to the mandrel tip () in the pivot region of the core template () and being attached to a traction means () implemented as a retrieval element.

Bending device for thin-walled metal pipes

An apparatus to produce straight bead welded tubes from flat sheet metal blanks with two parallel longitudinal edges includes two form tool halves. The two form tool halves have outer cylindrical half shells borne by a tool support, and are disposed laterally inverted in relation to one another. They are moved towards one another and out of an opened receiving position for the sheet metal blanks into a closed position, in which the two longitudinal edges are held together by the two form tool halves. The apparatus also includes a welding device, which moves over the two form tool halves along the two longitudinal edges retained in a welding position. The two form tool halves have cylindrical internal mandrel halves which are fixedly associated with the outer cylindrical half shells and which cooperate with the outer cylindrical half shells to produce form gaps for insertion of the sheet metal blanks.

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Moers, Germany

Thomas Neuhausmann