pressing forming method and equipment for the production of structural elements for automotive chassis

摘要

to reduce fracture generation at the edge of the groove flanges (7a, 7b) and wrinkles near the base of the groove flange and to suppress an increase in shim load, while the pressing conformation of the structural member (1) that is It is made of a high-strength steel plate or a thick plate and has a substantially gutter-shaped cross-section and a continuous outer flange at one end of the structural member. a method for producing the structural member (1), the method including: a first step in which the shim (15, 15a, 15b, 15c, 21) presses the forming material (16) against the core (13) to increase the portion corresponding to the flange to be formed at the ends of at least the track bottom (2) and groove (3a, 3b) in a direction opposite to the pressing direction, the shim (15, 15a, 15b, 15c, 21) folds one end of a portion to be formed in the groove (3a, 3b) in the pressing direction and constrains at least a portion of the end, and the core (13) and mold (14) perform pressing forming to form an intermediate product. while a region other than one end in a portion to be formed at the bottom of the chute (2) remains unrestricted.