Press-formed article manufacturing method and press line

A press-formed article manufacturing method of manufacturing a press-formed article, using a first pressing apparatus, a second pressing apparatus, and a third pressing apparatus,

• the first pressing apparatus being configured to include a first die, and a first punch that is disposed to face the first die and includes a pair of first punch shoulder portions,
• the second pressing apparatus being configured to include a second die including a die pad, and a second punch that is disposed to face the second die, has a convex portion having a width equal to or less than a spacing between the first punch shoulder portions at a top portion thereof, and includes a pair of second punch shoulder portions having a spacing wider than the spacing between the first punch shoulder portions,
• the third pressing apparatus being configured to include a third die having a width of a die hole equal to a width of a die hole of the second die, and a third punch including a pair of third punch shoulder portions having a spacing equal to the spacing between the second punch shoulder portions, and
• the press-formed article having a top plate, a pair of ridge portions located on both sides of the top plate in a width direction, and a pair of standing walls extending from the ridge portions to one side of the top plate in a plate thickness direction,
• the press-formed article manufacturing method comprising:
• a first step of pressing a blank with the first pressing apparatus to form a first intermediate formed article having a pair of bent portions that is bent to one side in the plate thickness direction and having a spacing between the bent portions that is narrower than a width of the top plate and equal to or more than a width of the top portion of the convex portion;
• a second step of moving the second die to the second punch side relative to the die pad and the second punch and forming a second intermediate formed article, having the standing wall formed therein, with the second die and the second punch, in a state where a portion between the bent portions is sandwiched between the die pad protruding from the second die to the second punch side, and the convex portion, with one side of the first intermediate formed article in the plate thickness direction as the convex portion side of the second pressing apparatus;
• and
• a third step of pressing the second intermediate formed article with the third die and the third punch of the third pressing apparatus to form the press-formed article in which the pair of bent portions are bent and stretched,
• wherein a relative position of the convex portion to the second punch in a press direction is fixed.