Press forming apparatus and production method for formed product

Abstract

A press forming apparatus includes a first die set and a second die set that are in positions to face each other in a press direction and perform relative movement in the press direction. The first die set includes a first support surface and a punch portion that protrudes from the first support surface. The second die set includes a press surface disposed so as to be out of position from a position to face the punch portion in the press direction, and a wall surface that is continuous with the press surface. When viewed from the second die set side in the press direction, the punch portion includes a side surface that faces the wall surface and that includes an opening opened on the wall surface side. At a forming bottom dead center of the relative movement between the first die set and the second die set in the press direction, the wall surface faces the side surface of the punch portion.

1 . A press forming apparatus comprising
 a first die set and a second die set in positions to face each other in a press direction, the first die set and the second die set performing relative movement in the press direction,   the first die set including a first support surface and a punch portion that protrudes from the first support surface, and   the second die set including a press surface disposed so as to be out of position from a position to face the punch portion in the press direction and a wall surface that is continuous with the press surface, wherein   when viewed from a side of the second die set in the press direction, the punch portion includes a side surface that faces the wall surface and that includes an opening opened on a side of the wall surface, and   at a forming bottom dead center of the relative movement between the first die set and the second die set in the press direction, the wall surface faces the side surface of the punch portion.   
     
     
         2 . The press forming apparatus according to  claim 1 , wherein
 the punch portion includes a plurality of support portions,   the side surface of the punch portion includes side surfaces of the plurality of support portions, and   the side surfaces of two adjacent support portions among the plurality of support portions are arranged so as to be spaced apart with the opening in between.   
     
     
         3 . The press forming apparatus according to  claim 2 , wherein
 the opening includes a connecting portion that connects two adjacent support portions among the plurality of support portions, and   when viewed from the side of the second die set in the press direction, a distance between a side surface of the connecting portion and the wall surface is longer than a distance between the side surface of the support portion and the wall surface.   
     
     
         4 . The press forming apparatus according to  claim 2 , wherein
 the opening includes a connecting portion that connects two adjacent support portions among the plurality of support portions, and   in the press direction, a position of a top portion of at least one of the support portions is different from a position of a top portion of the connecting portion that is adjacent to the support portion.   
     
     
         5 . The press forming apparatus according to  claim 2 , wherein
 in the press direction, a position of a top portion of at least one support portion among the plurality of support portions is different from positions of top portions of other support portions.   
     
     
         6 . The press forming apparatus according to  claim 1 , wherein
 the second die set includes a pad disposed in a position to face the punch portion in the press direction.   
     
     
         7 . A production method for a formed product by a first die set and a second die set facing across a blank in a press direction performing relative movement in the press direction to subject the blank to press forming, wherein
 the first die set includes a first support surface and a punch portion that protrudes from the first support surface,   the second die set includes a press surface disposed so as to be out of position from a position to face the punch portion in the press direction and a wall surface that is continuous with the press surface, and   the blank includes a first plate-like portion and a second plate-like portion that faces the first plate-like portion in the press direction,   the method comprising:   supporting the first plate-like portion by the first support surface from a side of the first die set and supporting the second plate-like portion by the punch portion crossing the first plate-like portion in the press direction from the side of the first die set; and in this state,   subjecting the second plate-like portion to bending deformation by the press surface that moves relative to the punch portion in the press direction, wherein   at a forming bottom dead center of the relative movement between the first die set and the second die set in the press direction, the wall surface faces a side surface of the punch portion with part of the second plate-like portion in between.   
     
     
         8 . The production method for a formed product according to  claim 7 , wherein
 when the second plate-like portion is supported by the punch portion, the punch portion passes through a through-hole formed in the first plate-like portion to cross the first plate-like portion.   
     
     
         9 . A production method for a formed product by a first die set and a second die set facing across a blank in a press direction performing relative movement in the press direction to subject the blank to press forming, wherein
 the first die set includes a first support surface and a punch portion that protrudes from the first support surface,   the second die set includes a press surface disposed so as to be out of position from a position to face the punch portion in the press direction and a wall surface that is continuous with the press surface,   when viewed from a side of the second die set in the press direction, the punch portion includes a side surface that faces the wall surface and that includes an opening opened on a side of the wall surface, and   the blank includes a plate-like portion and a protruding portion that protrudes from the plate-like portion in a thickness direction of the plate-like portion,   the method comprising:   supporting the plate-like portion by the punch portion in the press direction from a side of the first die set; and in this state,   subjecting the plate-like portion to bending deformation by the press surface that moves relative to the punch portion in the press direction, wherein   at a forming bottom dead center of the relative movement between the first die set and the second die set in the press direction, the wall surface faces a side surface of the punch portion with part of the plate-like portion in between, and the protruding portion enters the opening without contacting the side surface.