A hot-press molding apparatus includes an upper mold (14) having a molding surface for molding a to-be-molded portion (4) of a metal sheet material (2) and a blade (32a) serving as a punch (32), a lower mold (13) having a molding surface (21) for molding the to-be-molded portion by sandwiching it in cooperation with the upper mold, and a die (16) configured to separate, from the to-be-molded portion, a trimming portion (3) positioned outside the to-be-molded portion in the metal sheet material in which the to-be-molded portion is molded by the upper mold and the lower mold, in cooperation with the blade of the upper mold. An outer side surface (14a) of the upper mold is so formed as to extend in the cutting direction of the punch, and defines, on the side of the upper mold, a cooling suppression space (62) to which the trimming portion is exposed and which suppresses cooling of the trimming portion. A hot-press molding apparatus capable of preventing the occurrence of delayed fracture in a molded product is provided.

A hot-press molding apparatus includes an upper mold (14) having a molding surface for molding a to-be-molded portion (4) of a metal sheet material (2) and a blade (32a) serving as a punch (32), a lower mold (13) having a molding surface (21) for molding the to-be-molded portion by sandwiching it in cooperation with the upper mold, and a die (16) configured to separate, from the to-be-molded portion, a trimming portion (3) positioned outside the to-be-molded portion in the metal sheet material in which the to-be-molded portion is molded by the upper mold and the lower mold, in cooperation with the blade of the upper mold. An outer side surface (14a) of the upper mold is so formed as to extend in the cutting direction of the punch, and defines, on the side of the upper mold, a cooling suppression space (62) to which the trimming portion is exposed and which suppresses cooling of the trimming portion. A hot-press molding apparatus capable of preventing the occurrence of delayed fracture in a molded product is provided.

A method of forming a hot stamped, die quenched, and die trimmed part is provided. The method includes hot stamping and die quenching a blank with a quench die and forming a die quenched panel. The quench die includes at least one slow-cooling channel. The die quenched panel is die trimmed along the at least one localized soft zone that is adjacent a hard zone. The blank may be formed from a press hardenable steel (PHS), and the at least one soft zone may have a ferritic microstructure and the at least one hard zone may have a martensitic microstructure. The at least one localized soft zone may have a microhardness between about 200 HV and about 250 HV and the hard zone may have a microhardness between about 400 HV and about 500 HV.

A method of forming a hot stamped, die quenched, and die trimmed part is provided. The method includes hot stamping and die quenching a blank with a quench die and forming a die quenched panel. The quench die includes at least one slow-cooling channel. The die quenched panel is die trimmed along the at least one localized soft zone that is adjacent a hard zone. The blank may be formed from a press hardenable steel (PHS), and the at least one soft zone may have a ferritic microstructure and the at least one hard zone may have a martensitic microstructure. The at least one localized soft zone may have a microhardness between about 200 HV and about 250 HV and the hard zone may have a microhardness between about 400 HV and about 500 HV.

A method for manufacturing a press-formed article (100) includes a first step for forming a base sheet portion, a first rising portion, and a first strip portion from a sheet-shaped workpiece having a first edge portion and a second edge portion; and a second step for forming a second rising portion by causing a strip-shaped first zone including the second edge portion to be disposed between a first upper die and a first lower die from both sides, causing a second zone adjacent to the first zone to be disposed between a second upper die and a second lower die from both sides, and moving the first upper die and the first lower die relative to the second upper die and the second lower die, wherein, in the second step, a part of the second rising portion which is connected to a vertical ridge line (108) is shear-deformed.

A method for manufacturing a press-formed article (100) includes a first step for forming a base sheet portion, a first rising portion, and a first strip portion from a sheet-shaped workpiece having a first edge portion and a second edge portion; and a second step for forming a second rising portion by causing a strip-shaped first zone including the second edge portion to be disposed between a first upper die and a first lower die from both sides, causing a second zone adjacent to the first zone to be disposed between a second upper die and a second lower die from both sides, and moving the first upper die and the first lower die relative to the second upper die and the second lower die, wherein, in the second step, a part of the second rising portion which is connected to a vertical ridge line (108) is shear-deformed.

The present invention generally relates to the modification of a deep-drawing sheet blank (P) for electric resistance heating. Generally, the modified sheet blank comprises slits (Z) being made in the edges of the blank (P) transversely to the electric current flow and oriented towards the perimeter of the forming zone (T). The distances between the ends of the slits (Z) and the forming zone (T) perimeter may be equal. The ends of the slits (Z) oriented towards the forming zone perimeter (T) may also be rounded.

The present invention generally relates to the modification of a deep-drawing sheet blank (P) for electric resistance heating. Generally, the modified sheet blank comprises slits (Z) being made in the edges of the blank (P) transversely to the electric current flow and oriented towards the perimeter of the forming zone (T). The distances between the ends of the slits (Z) and the forming zone (T) perimeter may be equal. The ends of the slits (Z) oriented towards the forming zone perimeter (T) may also be rounded.

A press die includes a fixed die, a first movable die, and a second movable die to cut out a product from a metal plate member, and a scrap cutter to cut scrap that is not part of the product. A fixed-die cutting blade of the fixed die is configured to have a fixed-die cutting blade relief portion formed near a base end of the protruding scrap cutter and recessed inward to the product side from the cutting line of the product. The fixed-die cutting blade relief portion includes a substantially arc-shaped cross-sectional portion corresponding to a machining radius of a machining tool for forming the scrap cutter. A first movable-die cutting blade of the first movable die has a movable-die cutting blade protrusion to cut the metal plate member inward to the product side from the cutting line of the product.

A die apparatus including a first die element and a second die element is provided. The first die element is arranged with the second die element for disposal of a blank therebetween and includes a coolant channel and a trim groove for alignment with a trim line of the blank. A groove insert is disposed within the trim groove arranged to support a portion of the blank extending thereover and to reduce a cooling rate of the blank. The groove insert may be of a material including reflective radiation characteristics to reduce heat transfer from portions of the blank adjacent the trim line. The first die element may include a cavity aligned with a pierce region of the blank so that the pierce region does not contact an adjacent die element surface.