公开(公告)号：EP1833627A1

公开(公告)日：2007-09-19

申请号：EP05819234.5

申请日：2005-12-05

申请人： CDP Bharat Forge GmbH

发明人： PRUSSAK, Matthias ,  BERNHARDT, Ralph

IPC分类号： B21K1/18 ,  B21K21/12

CPC分类号： B21K1/18 ,  B21J5/063 ,  B21K1/185 ,  B21K21/12 ,  Y10T409/303808

摘要： The invention relates to a method for producing essentially rotationally symmetrical, undercut contours on workpieces (13) that can for example be produced by forging or casting, said workpieces having at least one sub-section (14) to be machined with an essentially symmetrical initial contour. The workpiece (13) is braced by the end that is not to be machined in a recess (11) and when in said recess (11) the sub-section (14) of the workpiece that is to be machined is placed against a tool (12). The tool (12) rotates with a constant or variable speed in relation to the sub-section (14) of the workpiece (13) that is to be machined. An undercut contour is thus produced on the sub-section (14) of the workpiece (13) by machining under an axial pressure.