BLANK, FORMING PLATE, PRESS FORMED ARTICLE MANUFACTURING METHOD, AND PRESS FORMED ARTICLE

摘要

A blank that is a material for an elongated press formed article having a substantially hat shaped lateral cross-section profile including a top plate section, a ridge line section, a flange section, and vertical wall section, and configured with a first portion in which the top plate section has a fixed width, and a second portion including a curved portion in which the top plate section exhibits an L-shape in plan view due to the vertical wall section, the ridge line section, and the flange section curving along with the width of the top plate section gradually increasing. The blank has a shape of an opened-out shape of the press formed article, additionally with a first recess, a protrusion, and a second recess provided to an edge of an excess portion additionally provided at an edge of a location that will form the flange section configuring the curved portion.

主权项

1. A flat plate shaped blank for pressing to manufacture a worked component, the worked component comprising:
a top plate section comprising, of a pair of outer edge portions, at least one outer edge portion that has, in plan view, a straight-line outer edge portion of a straight line and a curved-line outer edge portion that is contiguous to the straight-line outer edge portion and that curves in a concave shape so as to move away from the other outer edge portion toward an outer side; a vertical wall section comprising a flat vertical wall portion that is bent downward from the outer edge portion and that is formed following the straight-line outer edge portion, and a curved vertical wall portion that is formed following the curved-line outer edge portion; and a flange section comprising a straight-line flange portion that extends from the flat vertical wall portion toward the outer side and that is formed following the straight-line outer edge portion, and a curved-line flange portion that is formed following the curved-line outer edge portion and that extends from the curved vertical wall portion toward the outer side, wherein: an excess portion is provided at a location corresponding to an edge of the flange section in an opened-out shape of the worked component, the excess portion being formed with a protrusion forming a protruding shape toward the outer side, and a first recess and a second recess respectively forming recessed shapes on either side of the protrusion; and at least the protrusion is provided at a location corresponding to an edge of the curved-line flange portion.