A shock absorbing member which can increase impact absorption energy and also enables thinning of a steel sheet that is a starting material, a method for producing the shock absorbing member, and a method for producing a steel sheet for cold plastic working are provided. The shock absorbing member includes a ridge portion formed in a curved shape as viewed from a longitudinal direction, and a wall portion extending from the ridge portion. In the wall portion, a ratio σ.sub.5/τ.sub.5 between a tensile stress σ.sub.5 when an elongation in a tensile test is 5% and a shear stress τ.sub.5 when a shear strain in a shear test is 5√3% is 1.70 or less, or a ratio σ.sub.10/τ.sub.10 between a tensile stress σ.sub.10 when an elongation in a tensile test is 10% and a shear stress τ.sub.10 when a shear strain in a shear test is 10√3% is 1.70 or less.

A structure includes: a first member made of metal having a tubular shape, and having a through-insertion hole; a second member made of resin and joined to the first member; and a third member made of metal having a tubular shape, and inserted through inside the first member. The third member is tube-expanded toward the first member and joined to the first member by press-fitting.

A structure includes: a first member made of metal having a tubular shape, and having a through-insertion hole; a second member made of resin and joined to the first member; and a third member made of metal having a tubular shape, and inserted through inside the first member. The third member is tube-expanded toward the first member and joined to the first member by press-fitting.

Disclosed are a pillar anchor for an automobile and a method of manufacturing the same. According to an embodiment of the disclosure, the pillar anchor for an automobile includes a pair of first and second anchor plates including metal, integrated in one body, and guiding a movement of a seat belt of a vehicle, wherein each of the first and second anchor plates includes a belt movement guide recess portion protruding toward one side of the first and second anchor plates through drawing processing, and guiding the movement of the seat belt, and a reinforcement flange formed at edge portions of the first and second anchor plates to reinforce the first and second anchor plates.

A reinforcing, baffling, or sealing device for a vehicle structure, the device comprising a carrier, an expandable material applied to the carrier, and openings formed in the carrier. The expandable material is formed of a heat activated material having foamable characteristics. The openings are formed in a repetitive pattern and perpendicular to a horizontal axis of the device. The device is stretched along the horizontal axis.

A reinforcing, baffling, or sealing device for a vehicle structure, the device comprising a carrier, an expandable material applied to the carrier, and openings formed in the carrier. The expandable material is formed of a heat activated material having foamable characteristics. The openings are formed in a repetitive pattern and perpendicular to a horizontal axis of the device. The device is stretched along the horizontal axis.

To reduce warping of vertical wall portions without causing buckling during pressing. Press-forming into a hat cross-sectional shape having one linear vertical wall portion and the other curved vertical wall portion and not having a flange portion is performed. A punch and a pad sandwiching a top sheet portion therebetween, bending blades for bend-forming the vertical wall portions, and stoppers facing the bending blades are provided. The punch is supported by a first cushion component. The bending blades each have an upper die component and a lower die component disposed facing each other in the press direction with an interval (D) equal to a set compression amount in the range of 2% or more and 6% or less of the heights of the vertical wall portions and a second cushion component interposed between the upper die component and the lower die component, maintaining the interval (D), and contractible in the press direction. The cushion pressure of the second cushion component is lower than the cushion pressure of the first cushion component and has such cushion pressure that the second cushion component does not contract during the bend-forming of the vertical wall portions.

A press-formed product is manufactured by press-forming a blank material into an intermediate shape, and further press-forming the blank material from the intermediate shape into the press-formed product having a target shape. A product portion of the target shape includes a first ridge line portion and a second ridge line portion each having a radius of curvature of 20 mm or smaller and a bending angle of 130 degrees or larger. The product portion of the intermediate shape has a curved shape having a radius of curvature of 100 mm or larger or a linear shape in a specific cross section. A height of an excess thickness portion of the intermediate shape is higher than 10 mm with respect to a peripheral portion and lower than a height of the excess thickness portion of the target shape.

A press-formed product is manufactured by press-forming a blank material into an intermediate shape, and further press-forming the blank material from the intermediate shape into the press-formed product having a target shape. A product portion of the target shape includes a first ridge line portion and a second ridge line portion each having a radius of curvature of 20 mm or smaller and a bending angle of 130 degrees or larger. The product portion of the intermediate shape has a curved shape having a radius of curvature of 100 mm or larger or a linear shape in a specific cross section. A height of an excess thickness portion of the intermediate shape is higher than 10 mm with respect to a peripheral portion and lower than a height of the excess thickness portion of the target shape.

A joining method of a structure includes preparing a first member including a first portion provided with a first hole and a second portion provided with a second hole, a second member, a die, and an elastic member, inserting the second member into the first hole, inserting the elastic member into the second member, in a state where one end of the second member in an axial direction is located between the first portion and the second portion, compressing and expanding the elastic member in the axial direction, thereby expanding and deforming the second member at a portion passing through the first hole to be swaged and joined to the first portion. The die includes a support surface for applying a compressive force from the die to the elastic member through the second hole. The support surface is perpendicular to an axial direction of the elastic member.