Patent ID: 7429172

Claim:
A tool for forming pieces of complex sheeting by hot stamping, comprising: a die; and a punch including a main body adapted to move uniaxially with respect to the die, a pressing assembly integral with the main body and comprising a first portion having a molding surface corresponding to a bottom portion of a work piece to be formed, a second portion having at least one molding surface corresponding to a flanged edge of the work piece, wherein the second portion is mounted to operably move between a first expansion position and a second retraction position, the molding surfaces of the first and second parts defining a primary molding surface corresponding to an internal face of the work piece in the expansion position, the second portion set back relative to the first position in the second position and comprising at least one part having a molding face comprising the at least one molding surface and corresponding to an inner side of the work piece and to a coupling zone of the inner sides to the bottom portion, the at least one part hinged on a periphery of the first portion, and means for maintaining the second portion in the retraction position, and means for initiating a transition into the expansion position upon contact of a blank against a bottom of the die.