Patent ID: 6012317
Filing Date: 2000-01-11
Classification: B21D

Abstract:
Arrangement for the internal high-pressure forming of a hollow profile, comprising an internal high-pressure forming tool having a die sink into which the hollow profile is insertable, at least one axial die having a sealing head configured to be insertable with play into the hollow profile, which sealing head has a support part provided with a pressure fluid duct, a sealing arrangement operatively held on the support part and rigidly connected with the axial die, the sealing arrangement having a stop surface which is arranged to rest in an operative position of the sealing head on a face side on the end of the hollow profile and containing at least one sealing element configured to be radially spread open for sealing contact on an interior side of the hollow profile, the at least one sealing element comprising a supporting ring configured to support the at least one sealing element so as to be axially displaceably guided on the support part relative thereto and to dip into the hollow profile with the sealing head being coupled to the hollow profile, and a stop body having the stop surface of the sealing head on the hollow profile and being fixedly connected with the supporting ring,wherein the support part has an operating device which, with the stop body in a rest position against the hollow profile, is configured to spread open the sealing element upon further axial movement of the support part relative to the supporting ring.