Patent ID: 7562551
Filing Date: 2009-07-21
Classification: B21D

Abstract:
1. A press die set for a multi-step press system wherein the press system is comprised of: a press including a table having a plurality of press-forming stations in which workpieces are sequentially press-formed, the press-forming stations being serially arranged in an X-axis direction, and a ram provided above the table for making rectilinear reciprocating movement in a Z-axis direction; and a transfer feeder provided between the table and the ram for simultaneously picking up the workpieces placed in the press-forming stations and transferring the workpieces in a downstream direction, the press die set comprising: a lower die attached to the table and an upper die attached to the ram, the lower die and the upper die being adapted to simultaneously press-form the workpieces placed in the press-forming stations, wherein the lower die includes a first base attached to the table, plural pairs of first guide rails fixedly secured to a top surface of the first base and arranged in a Y-axis direction, each pair of first guide rails having mutually opposing grooves, a plurality of first die segments for making direct contact with the workpieces to press-form the workpieces into desired shapes, each of the first die segments having a slider plate removably inserted into the grooves of each pair of first guide rails, and a plurality of first clamping units provided on opposite lateral sides of each pair of first guide rails for clamping the slider plate of each of the first die segments against removal, and wherein the upper die includes a second base attached to the ram, plural pairs of second guide rails fixedly secured to a bottom surface of the second base and arranged in the Y-axis direction, each pair of second guide rails having mutually opposing grooves, a plurality of second die segments for making direct contact with the workpieces to press-form the workpieces into desired shapes, each of the second die segments having a slider plate removably inserted into the grooves of each pair of second guide rails, and a plurality of second clamping units provided on opposite lateral sides of each pair of second guide rails for clamping the slider plate of each of the second die segments against removal.