Forming tool of the periphery of at least one orifice household in a workpiece tolee and method of formation of at least one orifice in one piece tolee by the use of such a tool.

摘要

The present invention relates to a forming tool of the periphery (22) of at least one orifice provided in one piece (20) tôlée which extends in a plane, said main plane, characterized in that it comprises: a matrix (10) having at least one housing (11) of the deformation of said rim (22) comprising an opening (12), a bottom (13) and the concave lateral walls (14) which extend from the opening (12) towards the bottom (13), at least a punch (30) comprising a face (31) of contact is intended to come into abutment against the periphery (22) of an orifice of said part (20) tôlée and a face (32) of the strike intended to be struck by a tool, the said face (31) of contact being shaped to said housing (11) of deformation; a backing plate (40) comprising at least one guide channel of a punch (30), the said backing plate (40) being intended to come into abutment against said part (20) tôlée and to guide the punch (30) during an impact on the punch so that the punch (30) causes a deformation of the periphery (22) of an orifice by compression of the said part (20) tôlée against the walls of said housing (11) of deformation and contributes to move said orifice in a plane parallel to said main plane.