Patent classifications
B21D22/225
HOT-STAMPING FORMED ARTICLE, STRUCTURAL MEMBER USING THE SAME, AND MANUFACTURING METHOD OF HOT-STAMPING FORMED ARTICLE
The present invention provides a hot-stamping formed article which is long and formed of a single steel sheet, the hot-stamping formed article including: two standing wall portions; a top sheet portion adjacent to the two standing wall portions; and a protrusion portion including an overlapping portion in which a portion of the steel sheet extending from at least one standing wall portion of the two standing wall portions and a portion of the steel sheet extending from the top sheet portion overlap, in which an angle between the top sheet portion and the protrusion portion in a case where a plane perpendicular to a longitudinal direction of the hot-stamping formed article is viewed in a cross section is larger than 90.
Formed article, structural member using the same, and manufacturing method of formed article
A long formed article made of one steel sheet includes a top sheet portion, a standing wall portion, and a protrusion portion formed in a portion of the top sheet portion by overlapping a portion extending toward an outside from each of both ends of the top sheet portion and a portion extending toward the outside from an upper end of the standing wall portion, in a non-protrusion region, a recessed part is formed in the top sheet portion, and a total value ? of inner surface peripheral lengths of the top sheet portion and the standing wall portion in a cross section of the formed article in a protrusion region and a total value ? of inner surface peripheral lengths of the top sheet portion, the standing wall portion, and the recessed part in the cross section of the formed article in the non-protrusion region satisfy 1.01??/??1.50.
FORMED ARTICLE, STRUCTURAL MEMBER USING THE SAME, AND MANUFACTURING METHOD OF FORMED ARTICLE
A long formed article made of one steel sheet includes a top sheet portion extending in a longitudinal direction, a standing wall portion extending downward from each of both edges of the top sheet portion in a width direction, and a protrusion portion formed in a portion of the top sheet portion in the longitudinal direction by overlapping a portion extending toward an outside from each of both ends of the top sheet portion in the width direction and a portion extending toward the outside from an upper end of the standing wall portion, in a non-protrusion region, a recessed part extending in the longitudinal direction is formed in the top sheet portion, and a total value of inner surface peripheral lengths of the top sheet portion and the standing wall portion in a cross section of the formed article perpendicular to the longitudinal direction in a protrusion region and a total value of inner surface peripheral lengths of the top sheet portion, the standing wall portion, and the recessed part in the cross section of the formed article perpendicular to the longitudinal direction in the non-protrusion region satisfy 1.01/1.50.
STABILIZER AND METHOD OF MANUFACTURING THE SAME
A stabilizer having a tubular shape is provided so as to extend in a widthwise direction of a vehicle and coupled to a suspension arm at opposite end portions of the stabilizer. Each of the opposite end portions includes: a first large-diameter bar portion having an outside diameter greater than an outside diameter of an intermediate portion of the stabilizer; and a second large-diameter bar portion having an outside diameter greater than the outside diameter of the first large-diameter bar portion and having a wall thickness greater than a wall thickness of the intermediate portion.
ASSIST DRAWING DEVICE
Provided is an assist drawing device by which, when a punch is moved from a stroke start edge toward a stroke end edge in accordance with a command from a control device to a punch drive unit, and drawing is performed in cooperation with a drawing die to thereby perform the drawing, assist drawing is performed while pressing a blank material against the drawing die by a blank holder and pressing both end surfaces of the blank material by assist punches, and in which the control device includes an assist pressure control unit configured to control an assist punch drive unit such that, when the assist drawing is performed, an assist pressure of the assist punches reaches a target assist pressure in accordance with a position of the punch.