| 摘要 |
An arrangement for the internal high-pressure forming of hollow profiles has an internal high-pressure forming tool, into whose die sinking the hollow profile can be inserted. At least one axial die has a sealing head which can be inserted with play by a section into the hollow profile. This sealing head has a support part which is provided with a pressure fluid duct and on which a sealing arrangement is held and which is rigidly connected with the axial die, and has a stop surface, which in the operative position of the sealing head rests on the face side against the end of the hollow profile. The sealing arrangement contains at least one sealing element which can be radially spread open for an allaround sealing contact on the interior side of the hollow profile. To achieve a reliable fluid high-pressure-tight sealing in a simple manner without deformation of the hollow profile, so that a forming is permitted which is secure with respect to the process relative to stable pressure conditions during internal high-pressure forming, the sealing arrangement has a supporting ring which supports the sealing element, can be axially displaceably guided on the support part relative thereto and dips into the hollow profile when the sealing head is coupled to the hollow profile. A stop body has the stop surface of the sealing ring on the hollow profile and which is fixedly connected with the supporting ring. The support part has an operating device which, when the stop body rests against the hollow profile, acts upon the sealing element in a spreading-open manner because of a further axial movement of the support part relative to the supporting ring in an interaction with the supporting ring.
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