Patent ID: 7127930
Filing Date: 2006-10-31
Classification: B21D

Abstract:
1. A pressing apparatus comprising pressing dies that are relatively movable in a pressing direction, each of the pressing dies having (1) a pressing-tooth holder with a recess having a bottom wall surface, (2) a pressing tooth disposed in the recess and (3) a wedge member for fixing the pressing tooth in the recess, and wherein: in each of the pressing dies, the pressing tooth and the wedge member slidably abut against each other at parting faces parallel to the pressing direction; each wedge member (1) has a first inclined surface inclined at an acute angle a with respect to the pressing direction, so that the wedge member narrows in a direction toward the bottom wall surface of the recess, and (2) slidably abuts, at the first inclined surface thereof, against a first inner wall surface of the recess; each pressing tooth (1) has a second inclined surface inclined at an acute angle β with respect to the pressing direction, so that the tooth widens in a direction toward the bottom wall surface of the recess, and (2) slidably abuts, at the second inclined surface, against a second inner wall surface of the recess; and wherein in each of the pressing dies, the wedge member, when subjected to a load F