公开(公告)号：US11298737B2

公开(公告)日：2022-04-12

申请号：US16472366

申请日：2018-01-05

申请人： UHDE HIGH PRESSURE TECHNOLOGIES GmbH ,  thyssenkrupp AG

发明人： Wilfried Knauf ,  Klaus Uhlig

IPC分类号： B21D26/033 ,  C21D7/12

摘要： A method for the autofrettage of a workpiece may involve arranging the workpiece between a first securing means and a second securing means, and applying high-pressure fluid to an internal volume of the workpiece that is formed between the first and second securing means. A die or ram may be driven into the internal volume through an inlet in the first securing means. Consequently, as a result of the ram being advanced, not only is a fluid pressure generated in the internal volume, but also the workpiece is mechanically autofrettaged by way of the ram. A device may be employed to perform such hydromechanical autofrettage of the workpiece.