PRESS FORMING APPARATUS AND PRESS FORMING METHOD

摘要

A press forming apparatus includes: a punch (31); a blank holder (32) disposed adjacent to the punch (31); a die (41) being a counterpart of the punch (31); and a pad (42) disposed to face the punch (31), wherein the punch (31) has a tip surface (31a), an outside surface (31b), and a stepped surface (31c) having shapes corresponding to a web portion, vertical wall portions, and a flange portion of a product, respectively. As a result that the punch (31) and the die (41) are relatively moved in a pressing direction in a state where a middle portion in a width direction of a workpiece (50) is sandwiched by the pad (42) and the punch (31) and an outer peripheral portion in the width direction of the workpiece (50) is bound by the blank holder (32) and the die (41), the outer peripheral portion in the width direction of the workpiece (50) gets out from between the blank holder (32) and the die (41), and the flange portion is shaped by the die (41) and the stepped surface (31c) of the punch (31).

主权项

1. A press forming apparatus forming a product by drawing from a plane workpiece made of metal, the product having a web portion, a first vertical wall portion extending toward one side of the web portion, a second vertical wall portion extending toward the other side of the web portion, at least one of a first flange portion further extending from the first vertical wall portion in at least a part of a longitudinal direction and a second flange portion further extending from the second vertical wall portion in at least a part of the longitudinal direction, the press forming apparatus comprising:
a punch; a blank holder disposed adjacent to the punch and slidable in a pressing direction; a die being a counterpart of the punch; and a pad disposed to face the punch and slidable in the pressing direction, wherein the punch has a tip surface, an outside surface, and a stepped surface having shapes corresponding to the web portion, the vertical wall portions, and the flange portion of the product, respectively, and wherein as a result that the punch and the die are relatively moved in the pressing direction in a state where a middle portion in a width direction of the workpiece is sandwiched by the pad and the punch and an outer peripheral portion in the width direction of the workpiece is bound by the blank holder and the die, the outer peripheral portion in the width direction of the workpiece gets out from between the blank holder and the die and the flange portion is shaped by the die and the stepped surface of the punch.