Abstract: A bumper reinforcement (10) includes a first member (1), and a second member (2). The first member (1) includes a first flat sheet (11), and two first parts (12). The first parts (12) are respectively connected to two side edges of the first flat sheet (11). The second member (2) includes a second plate (24), two wall parts (22), two flanges (21), and two second parts (23). The wall parts (22) are respectively connected to two side edges of the second plate (24). The flanges (21) are respectively connected to the two wall parts (22). The second parts (23) are respectively connected to side edges of the two flanges (21), and are provided so as to correspond to the first parts (23). The two flanges (21) of the second member (2) are joined with the first flat sheet (11) of the first member (1). The first parts (23) stand up toward the second member (2) side.

Abstract: [Object] To provide a method of manufacturing a plate-like molded body having a thickened portion in a region spaced apart from an edge in a substantially flat plate-like portion. [Solution] Provided is a method of manufacturing a plate-like molded body having a plurality of thickened portions, including at least a drawing step of obtaining by a drawing process a cylindrical drawn molded body including a flat plate portion and a cylindrical drawn portion that swells in such a manner as to project from the flat plate portion and has a circular top portion.

Abstract: A method of manufacturing a quenched member according to the present disclosure includes heating a pressed intermediate article to an Ac3 transformation point of a steel sheet or higher, the intermediate article having been processed so as to have a rectangular cross-section and so as to include a terminal portion at which two terminal edges of the steel sheet are aligned with each other at a same side of the rectangular cross-section, and quenching the heated intermediate article inside a die.

Abstract: A joining structure of the invention includes a first metal sheet and a pair of second metal sheets. Each of the pair of second metal sheets is overlapped on the first metal sheet in a state where an end surface of one of the second metal sheets and an end surface of the other second metal sheet face each other, and the end surfaces that face each other are integrally joined to the first metal sheet by means of a single mass of melted metal.

Abstract: A structural member made of metal, formed so as to extend long in a predetermined direction, and having a gutter bottom, two ridges continuing to both ends in a width direction of the gutter bottom, and two vertical walls continuing to the two ridges, includes an outward continuous flange continuously formed at least along the gutter bottom, the ridges, and the vertical walls at an end in the predetermined direction, in which a width of the gutter bottom is reduced as a distance from the end having the outward continuous flange becomes larger.

Abstract: A press-forming apparatus is an apparatus for producing a press-formed product having a hat-shaped cross section that has an external shape that curves in an L shape along a longitudinal direction in a planar view, and includes a punch, a first blank holder, a second blank holder, a preceding portion, a second die and a pad. When pushing the punch into a die to form a metal plate into the press-formed product, a first guide face of the preceding portion precedes a second guide face of the second die, and thereafter sliding of the first blank holder and the preceding portion relative to the punch is restricted and pushing of the punch into the die is continued in the restricted state to form the press-formed product. By this means, the press-formed product in which cracks and wrinkles are reduced is obtained.

Abstract: A steel material comprising, by mass%, C: greater than 0.05% to 0.2%, Mn: 1% to 3%, Si: greater than 0.5% to 1.8%, Al: 0.01% to 0.5%, N: 0.001% to 0.015%, Ti or a sum of V and Ti: greater than 0.1% to 0.25%, Ti: 0.001% or more, Cr: 0% to 0.25%, Mo: 0% to 0.35%, the balance: Fe and impurities, comprising a multi-phase structure having a ferrite main phase and a second phase containing one or more of bainite, martensite and austenite, wherein an average nanohardness of the second phase is less than 6.0 GPa, an average grain diameter of all crystal grains in the main phase and the second phase is 3 ?m or less, and a proportion of a length of small-angle grain boundaries where the misorientation is 2° to less than 15° in a length of all grain boundaries is 15% or more.

Abstract: A crash box has excellent axial crushing performance and in which, even if the sheet thickness of a tubular body constituting the crash box is smaller than 1.4 mm, good welding can be performed with the tubular body butted against a set plate. The crash box (1) having a metallic longer-length tubular body and a method for producing the crash box are provided. The tubular body has a basic cross-sectional shape that is a flat polygon surrounded by a plurality of ridges (2-1 to 2-4) extending in a longitudinal direction and a plurality of side wall portions (4), includes one or more groove portions (3-1 and 3-2) on side wall portions (4) on long sides substantially parallel to the major axis direction of the cross section that extend in longitudinal direction, and includes outward flanges (5-1 to 5-4) in an end portion in the longitudinal direction.

Abstract: A main body (2) has door attaching portions respectively formed on both end sides of a long longitudinal direction thereof and a bending deformation generation portion (3) disposed between the door attaching portions, and the bending deformation generation portion (3) has a groove bottom portion (4), two edge line portions (5a, 5b), two vertical wall portions (6a, 6b), two curved portions (7a, 7b), and two flanges (8a, 8b). There is provided a bead (13) which is formed toward the longitudinal direction of the main body (2) in a part of the groove bottom portion (4) in a manner to project in a shape having a curved surface toward the outside of a cross-sectional shape of the bending deformation generation portion (3) so as to oppose an impact load acting on a door impact beam (1).

Abstract: To provide a panel whose surface rigidity can be improved appropriately in accordance with a load. Provided is a panel including: a load point to which a load is applied from the outside; and a protrusion that protrudes from a surface of the panel and is formed continuously or discontinuously around the load point. The protrusion intersects, at a plurality of positions, each of a plurality of virtual straight lines extending radially from the load point.

Abstract: A hot press device according to the present disclosure includes a first press, a second press, a conveyance device linking the first press and the second press together, and a heating furnace provided within a conveyance range of the conveyance device.

Abstract: An impact absorbing member 10 able to secure absorption energy while lightening weight by absorbing the impact load applied in the axial direction by periodic buckling, wherein the impact absorbing member 10 is provided with a main body 20 comprised of metal sheet and having a polygonal shape in cross-section vertical to an axial direction and a center sheet 30 comprised of metal sheet and provided at a hollow part in the main body along the axial direction, the polygonal shape of the main body 20 includes a pair of long side (20a, 20b) facing each other, the center sheet 30 is joined to each of the long sides (20a, 20b) of the polygonal shape of the main body 20, and the sheet thickness t1 (mm) of the main body 20 and the sheet thickness t2 (mm) of the center sheet 30 satisfy 1.3×t1?t2.

Abstract: A work vehicle includes a cab, a body frame and a restrictor. The body flame includes a base component, and a support frame provided on an upper side of the base component. The support frame supports the cab. The restrictor is provided to a floor frame of the cab. The restrictor is disposed between the base component and the floor frame. The restrictor includes a retaining member disposed on a lower side of the support frame, and an impact absorber disposed on a cab side of the retaining member.

Abstract: Disclosed is a method to manufacture a pressed component from an intermediate stock, which includes two bent portions with a spacing thereof narrower than a width of a top plate of the pressed component, by employing a press including a die having a die pad and a punch having an inner pad, the method including: gripping a portion between the bent portions with the inner pad and the die pad in a state in which the inner pad projects from the punch and the die pad projects from the die; moving the die toward the punch side to form vertical walls of the pressed component with the die and the punch; and integrating the die and the die pad and then moving the die, the die pad and the inner pad toward the punch side to form the top plate.

Abstract: [Object] Provided is a press-molded product capable of improving the bonding strength between a vehicle body reinforcing member and the other member or the rigidity of a vehicle body by enlarging a cross-section of a member to a fullest extent of a design cross-section without forming a notch for preventing a press-molding failure in a ridge-portion flange. [Solution] A press-molded product is formed by a steel plate having a tensile strength of 340 MPa or more, and includes an inward continuous flange in at least one end portion in a predetermined direction, the inward continuous flange being obtained by continuously forming a ridge-portion flange formed inward in the end portion of the ridge portion, a first flange formed inward in at least a part of an area of the end portion of a first surface portion, and a second flange formed inward in at least a part of an area of the end portion of a second surface portion.

Abstract: [Object] Provided is a press-molded product capable of improving the bonding strength between a vehicle body reinforcing member and the other member or the rigidity of a vehicle body by enlarging a cross-section of a member to a fullest extent of a design cross-section without forming a notch for preventing a press-molding failure in a ridge-portion flange. [Solution] A press-molded product is formed by a steel plate having a tensile strength of 340 MPa or more, and includes an inward continuous flange in at least one end portion in a predetermined direction, the inward continuous flange being obtained by continuously forming a ridge-portion flange formed inward in the end portion of the ridge portion, a first flange formed inward in at least a part of an area of the end portion of a first surface portion, and a second flange formed inward in at least a part of an area of the end portion of a second surface portion.

Abstract: To make it possible to make impact absorption at the time of a collision even when there is no sufficient space. [Solution] An impact absorption member according to the present invention includes: a member that is placed adjacent to an exterior material 110 of an automobile and in which a height in a direction orthogonal to the exterior material is larger than a width in a direction along the exterior material in a cross section orthogonal to an extending direction of the member. By this configuration, a first member 122 and a second member 124 are arranged so as to extend in different directions and be adjacent to the exterior material 110 of an automobile, and therefore impact absorption at the time of a collision can be made even when there is no sufficient space.

Abstract: [Object] Provided is a configuration that makes up for a lack of tensile rigidity and a lack of collision properties at the same time. [Solution] An automotive exterior panel according to the present invention: an exterior material 110; and a reinforcing member 120 that is in contact along an automobile inside surface of the exterior material 110 and of which a second moment of area in a direction orthogonal to the exterior material is less than or equal to 15,000 mm4 in a cross section orthogonal to a longitudinal direction of the reinforcing member. By this configuration, the second moment of area in a direction orthogonal to the longitudinal direction of the reinforcing member 120 is made less than or equal to 15,000 mm4, and hence a lack of tensile rigidity can be made up for at the same time.

Abstract: An impact absorbing member 10 able to secure absorption energy while lightening weight by absorbing the impact load applied in the axial direction by periodic buckling, wherein the impact absorbing member 10 is provided with a main body 20 comprised of metal sheet and having a polygonal shape in cross-section vertical to an axial direction and a center sheet 30 comprised of metal sheet and provided at a hollow part in the main body along the axial direction, the polygonal shape of the main body 20 includes a pair of long side (20a, 20b) facing each other, the center sheet 30 is joined to each of the long sides (20a, 20b) of the polygonal shape of the main body 20, and the sheet thickness t1 (mm) of the main body 20 and the sheet thickness t2 (mm) of the center sheet 30 satisfy 1.3×t1?t2.

Abstract: To provide a panel whose surface rigidity can be improved appropriately in accordance with a load. Provided is a panel including: a load point to which a load is applied from the outside; and a protrusion that protrudes from a surface of the panel and is formed continuously or discontinuously around the load point. The protrusion intersects, at a plurality of positions, each of a plurality of virtual straight lines extending radially from the load point.