METHOD FOR MANUFACTURING PRESS-MOLDED ARTICLE, AND MOLDING DIE

• Main Author: FUJIMOTO MASAYA
• Format: Patent
• Language: English; Japanese
• Published: 29.03.2022
• Subjects: MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; PERFORMING OPERATIONS; PUNCHING METAL; TRANSPORTING; WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL

To obtain a method for manufacturing a press-molded article that is capable of more reliably suppressing generation of wrinkles, and to provide a molding die.SOLUTION: A press working process for molding a press-molded article 20 includes: a primary molded article molding step for molding a primary molded article 40 having an intermediate wall part 421 being a part of a protruding side wall part 22, and an intermediate flange 422 provided continuously with the intermediate wall part 421; and a secondary molded article molding step for molding a secondary molded article 50 having a wall part 52 being the protruding side wall part 22, by extending a portion on at least an intermediate wall part 421 side of the intermediate flange 422 molded in the primary molded article molding step, along the intermediate wall part 421. Further, in the primary molded article molding step, the intermediate wall part 421 is formed so that a depth of a boundary valley line 423 between the intermediate wall part 421 and the intermediate flange 422 at a section with a large curvature, is deeper than a depth of the boundary valley line 423 at a section with a small curvature.SELECTED DRAWING: Figure 8 【課題】シワが発生してしまうことをより確実に抑制することが可能なプレス成形品の製造方法および成形用金型を得る。【解決手段】プレス成形品２０を成形するプレス加工工程は、凸状側の壁部２２の一部となる中間壁部４２１と、中間壁部４２１に連設される中間フランジ４２２と、を有する１次成形品４０を成形する１次成形品成形工程と、１次成形品成形工程で成形された中間フランジ４２２の少なくとも中間壁部４２１側の部位を中間壁部４２１に沿うように延ばすことで、凸状側の壁部２２となる壁部５２を有する２次成形品５０を成形する２次成形品成形工程と、を備える。そして、１次成形品成形工程において、曲率の大きな部分における中間壁部４２１と中間フランジ４２２との境界谷線４２３の深さが、曲率の小さな部分における境界谷線４２３の深さよりも深くなるように、中間壁部４２１を形成する。【選択図】図８