Abstract: A front pillar lower outer includes a bent portion, and a first region and a second region, and is a skeletal component for automobile that is assumed to receive a collision load along the extending direction of the first region. The outer is constituted by attaching a first member that is arranged on a first region side, and a second member that is arranged on a second region side. An attachment line of the both members is arranged in a predetermined zone between a first boundary and a second boundary. The plate thickness of the first member is larger than the plate thickness of the second member.

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 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: Provided is a crash box having improved robustness, wherein an angle of the pair of corner portions is set to 90° or larger and 150° or smaller, an angle of the another pair of corner portions is set to 30° or larger and 90° or smaller, one or more inwardly convex trench portions extending in a longitudinal direction are provided, a cross-sectional peripheral length of the tubular body in the one end side is shorter than a cross-sectional peripheral length of the tubular body in the other end side, an aspect ratio between the longest one and the shortest one of diagonal lines of a polygon changes depending on a position on the axial direction of the tubular body, and overall sides on the cross section in the one end are formed in parallel to the opposite sides on the cross section in the other end.

Abstract: A blank steel plate is planar and used for producing a press-formed product that has an open cross-section including a bent portion. The blank steel plate is homogeneous in its entirety and includes a belt-shaped thick area that has an increased thickness, thin areas that are adjacent to both sides of the thick area and have a thickness smaller than the thickness of the thick area. On the front surface of a front surface and a back face of the blank steel plate, a step height in thickness is formed along one of both side portions of the thick area, and on the back face, a step height a thickness is formed along the other of both side portions of the thick area. By using the blank steel plate in producing the press-formed product, it is possible to optimizing the strength of the press-formed product, and suppress manufacturing costs.

Abstract: [Object] Provided is a structural member for an automotive body, which is excellent in load transfer capability and rigidity by effectively enhancing energy absorption efficiency provided by disposing a groove in the structural member having a substantially gutter-shaped cross section and a groove in the top plate. [Solution] The structural member for an automotive body, the structural member consisting of a press-formed product made of a steel sheet, the press-formed product extending in a predetermined direction, including a top plate, a ridge continuing to the top plate, and a vertical wall continuing to the ridge, and having a substantially gutter-shaped cross section intersecting the predetermined direction, includes at least one groove formed in the top plate, and extending in the predetermined direction, and an outward flange formed at least in a region of the ridge in an end in the predetermined direction.

Abstract: To reduce the generation of cracking in the edge of the ridge flange (7a, 7b) and wrinkling near the base of the ridge flange and can suppress an increase in the pad load, while press forming the structural member (1) that is made of a high-tensile steel sheet or a thick steel sheet and that has a substantially gutter-shaped cross section and an outward continuous flange in an end of the structural member.

Abstract: A panel comprises a reinforcing unit including a plurality of first rectangular regions and a plurality of second rectangular regions. The first and second rectangular regions are in rows and columns, the first and second rectangular regions in each row being arranged alternately and the first and second rectangular regions in each column being arranged alternately. Each of the first rectangular regions includes a fully-covering first protrusion protruding in a first direction perpendicular to an imaginary reference plane and having a flat top surface. Each of the second rectangular regions includes a partially-covering second protrusion protruding in a second direction opposite to the first direction and having a flat top surface. A partially-covering reinforcing protrusion extends between opposite sides and protrudes in the first direction and having a flat top surface. The top surface of the reinforcing protrusion forms one face together with the top surface of the first protrusion.

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 resistance spot welding apparatus for performing resistance spot welding on a sheet set including a plurality of lapped metal sheets includes a pair of composite electrodes facing each other so as to hold the sheet set therebetween. The composite electrodes each include: a rod-shaped electrode body having an end surface that is brought into contact with and pressed against the sheet set; an electrically conductive rigid body having a through hole in which the electrode body is inserted and having an end surface that is brought into contact with and pressed against the sheet set; and a resilient member coupled to a rear end of the rigid body, the resilient member configured to apply a pressing force to the rigid body as the electrode body and the rigid body are pressed against the sheet set.

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] In forming a press-formed product (10) that is made of a high-tensile steel sheet having a tensile strength of 390 MPa or more, and has a substantially gutter-shaped cross section and an outward continuous flange (16), wrinkling in ridges (12a, 12b) and cracking in the outward continuous flange are reduced. [Solution] A method for manufacturing a press-formed product (10) that is made of a high-tensile steel sheet of 390 MPa or more, and has a substantially gutter-shaped cross section and an outward continuous flange (16) in at least one end in a predetermined direction includes a first step in which, after a first pad (34-1) restrains at least a part of a portion to be formed into a gutter bottom (11) in a forming material (33), a second pad (34-2) restrains at least a part of the end of portions to be formed into ridges (12a, 12b) and subsequently carries out press forming.

Abstract: [Object] To provide a press-molded product including an inward continuous flange and capable of improving performance involved with the bonding strength between a reinforcing member and the other member or the rigidity of a vehicle body without forming a notch in a ridge-portion flange so as to prevent a defect generated during a press-molding process.

Abstract: The invention provides a method for forming tissue pieces which allows stable and accurate winding around a core rod in rolling a sheet-like tissue piece, and a device therefor. In the tissue pieces used as each tissue piece in a tissue array obtained by arranging the tissue pieces on a substrate in an array form, the method for forming a roll-shaped tissue piece 6 obtained by rolling a sheet-like tissue piece 8 is characterized by the facts that the sheet-like tissue piece 8 is produced by slicing a tissue block 5 obtained by embedding the tissues with an embedding medium, the sheet-like tissue piece 8 is placed on a mounting block 12, peeling means 13 which easily enables peeling of the tissue piece 8 from the mounting block 12 is applied between the mounting block 12 and the tissue piece 8, and the tissue piece 8 is wound around a core rod 11 while heating the tissue piece 8 on the mounting block 12.

Abstract: A press forming apparatus includes: a punch (31); a blank holder (32) disposed adjacent to the punch (31); a die (41) being a counterpart of the punch (31); and a pad (42) disposed to face the punch (31), wherein the punch (31) has a tip surface (31a), an outside surface (31b), and a stepped surface (31c) having shapes corresponding to a web portion, vertical wall portions, and a flange portion of a product, respectively. As a result that the punch (31) and the die (41) are relatively moved in a pressing direction in a state where a middle portion in a width direction of a workpiece (50) is sandwiched by the pad (42) and the punch (31) and an outer peripheral portion in the width direction of the workpiece (50) is bound by the blank holder (32) and the die (41), the outer peripheral portion in the width direction of the workpiece (50) gets out from between the blank holder (32) and the die (41), and the flange portion is shaped by the die (41) and the stepped surface (31c) of the punch (31).

Abstract: A front floor panel for an automotive body as a lightweight sheet can be reliably press-formed without a press forming loads becoming excessively large, can have desired stiffness, and noise and vibration characteristics for all directions since there is little stiffness anisotropy. The front floor panel includes a floor tunnel formed in a center in an automotive width direction to be oriented to a longitudinal direction, upright flanges disposed left and right formed at a left and right end portions in the automotive width direction to be joined to side sills, and a left and right plane portions formed between the upright flanges disposed left and right and a left and right longitudinal wall portions of the floor tunnel. In loop-shaped areas including outer edge portions of the plane portions, convex-concave parts in specific shapes are formed, and remaining areas excluding the loop-shaped areas are formed into flat sheet shapes.

Abstract: In a press forming step of obtaining, from a blank (300) of high-tensile strength steel sheet of 390 MPa or more, a press-formed product with a shape of cross section having at least a groove bottom part (101), ridge line parts (102), and vertical wall parts (103), and in which an outward flange (106) including parts (106a) along the ridge line parts (102) is formed at an end part in a longitudinal direction, forming of parts to be formed to the ridge line parts (102) is started by creating a state where a region (300a) positioned at least at an end portion in a longitudinal direction of a part to be formed to the groove bottom part (101) of the blank (300) is separated from a punch top part (201b), and at that time or thereafter, the region (300a) is made to approach the punch top part (201b).

Abstract: The steel material for an impact absorbing member has a composition containing: by mass %, C: 0.05 to 0.18%, Mn: 1 to 3%, Si+Al: at least 0.5% and less than 2.5%, and N: 0.001 to 0.015%, and in some cases, Cr: at most 0.5%, Mo: at most 0.2%, Ti: at most 0.05%, Nb: at most 0.05%, V: at most 0.2%, and B: at most 0.002%, the remainder being Fe and impurities. The steel material structure contains at least 70% by area of bainite made up of a lath structure having an average interval of at most 1 mm and martensite, 5 to 30%, and satisfies Formulas (1) and (2): (1) 1.2 £ HM0/HB0 £ 1.6, (2) 0.90 £ {(HM10/HM0)/(HB10/HB0) £ 1.3, where HM0 and HM10 represent average nano hardness in an initial state and after 10% tensile deformation of the martensite, and HB0 and HB0 represent that of bainite, respectively.

Abstract: In a floor cross member configured by a web surface (4a) as the top surface, a ridge part (4b) contiguous to the web surface (4a), and a vertical wall surface (4c) contiguous to the ridge part (4b), having a tensile strength of 440 MPa or larger, flanges (4e) are formed at both longitudinal ends continuously around at least the web surface (4a), the ridge part (4b) and the vertical wall surface (4c), and the floor cross member (4) is connected through the flanges (4e) to a tunnel part (2a) and to a side sill (3). The flange (4e) has a flange width lfc, at the center in the perimeter direction of the curved part (4e-2), not smaller than the minimum flange width lfs of the curved part (4e-2). Accordingly, a vehicle body, which is suppressed in deformation of the floor cross member (4) and improved in the torsional rigidity, is successfully provided.

Abstract: Provided is a crash box having improved robustness, wherein an angle of the pair of corner portions is set to 90° or larger and 150° or smaller, an angle of the another pair of corner portions is set to 30° or larger and 90° or smaller, one or more inwardly convex trench portions extending in a longitudinal direction are provided, a cross-sectional peripheral length of the tubular body in the one end side is shorter than a cross-sectional peripheral length of the tubular body in the other end side, an aspect ratio between the longest one and the shortest one of diagonal lines of a polygon changes depending on a position on the axial direction of the tubular body, and overall sides on the cross section in the one end are formed in parallel to the opposite sides on the cross section in the other end.