Abstract: A door beam includes an outer flange, an inner flange, and a pair of webs connecting the outer flange and the inner flange. The outer flange, the inner flange, and the pair of webs define a closed cross-sectional portion. The outer flange includes an outer central portion constituting the closed cross-sectional portion, and outer protruding portions protruding outward from the closed cross-sectional portion. The inner flange is formed with an attachment press working portion having been subjected to press working so as to serve as an attachment portion with respect to the inner panel at both end portions in the longitudinal direction. The outer protruding portion is formed with a mastic press working portion having been subjected to press working so as to serve as an attachment portion with respect to the outer panel.

Abstract: A bumper reinforcement includes an aluminum alloy extrusion body having a pair of flanges to be positioned on a vehicle body side and on a collision side and a pair of webs to be positioned in a vehicle vertical direction. The pair of webs connect the pair of flanges at joint portions such that the pair of webs and the pair of flanges form a closed cross section, and the pair of webs do not have a welded portion.

Abstract: To compensate for a decrease in reaction force of a bumper reinforcement, which is made of an aluminum alloy extrusion having two end portions subjected to bend forming and crushed portions on the respective end portions, against an impact load in end impact involved in crushing, and compensate for a decrease in energy absorption amount of the bumper reinforcement. Assuming a space between two flanges includes a first region from a center line of the thickness between the flanges to an outer flange and a second region from the center line to an inner flange in a cross section of the crushed portion perpendicular to an extrusion direction, area of the webs located in one (for example, the first region) of the two regions is larger than area of the webs located in the other region (for example, the second region).

Abstract: To compensate for a decrease in reaction force of a bumper reinforcement, which is made of an aluminum alloy extrusion having two end portions subjected to bend forming and crushed portions on the respective end portions, against an impact load in end impact involved in crushing, and compensate for a decrease in energy absorption amount of the bumper reinforcement. Assuming a space between two flanges includes a first region from a center line of the thickness between the flanges to an outer flange and a second region from the center line to an inner flange in a cross section of the crushed portion perpendicular to an extrusion direction, area of the webs located in one (for example, the first region) of the two regions is larger than area of the webs located in the other region (for example, the second region).

Abstract: A door beam including an inner flange extending in a longitudinal direction, an outer flange extending in the longitudinal direction and facing the inner flange at a distance from the inner flange, and-a pair of webs connecting the inner flange and the outer flange. The inner flange has an end portion in the longitudinal direction which is made closer to an end portion of the outer flange such that the distance between the inner and outer flanges at the end portions is shorter than the distance at other portions of the inner and outer flanges.

Abstract: A bumper reinforcement includes an aluminum alloy extrusion body having a pair of flanges to be positioned on a vehicle body side and on a collision side and a pair of webs to be positioned in a vehicle vertical direction. The pair of webs connect the pair of flanges at joint portions such that the pair of webs and the pair of flanges form a closed cross section, and the pair of webs do not have a welded portion.

Abstract: An aluminum alloy member resistant to cracking and having high strengths and excellent stress corrosion cracking resistance is manufactured by crushing a 7xxx aluminum alloy extrudate. Specifically, a 7xxx aluminum alloy extrudate containing Zn of 3.0-8.0%, Mg of 0.4-2.5%, Cu of 0.05-2.0%, and Ti of 0.005-0.2%, in mass percent, and prepared through press quenching is subjected to a reversion treatment, to crushing within 72 hours after the reversion treatment, and then to aging. The reversion treatment includes heating at a temperature rise rate of 0.4° C./second or more, holding in a temperature range of 200-550° C. for longer than 0 second, and cooling at a rate of 0.5° C./second or more. The ratio of the tensile residual stress ?rs to the 0.2% yield stress ?0.2 after aging and the total content X of Mg and Zn satisfy a condition specified by Expression (1): Y??0.1X+1.4??(1).

Abstract: An aluminum alloy member resistant to cracking and having high strengths and excellent stress corrosion cracking resistance is manufactured by crushing a 7xxx aluminum alloy extrudate. Specifically, a 7xxx aluminum alloy extrudate containing Zn of 3.0-8.0%, Mg of 0.4-2.5%, Cu of 0.05-2.0%, and Ti of 0.005-0.2%, in mass percent, and prepared through press quenching is subjected to a reversion treatment, to crushing within 72 hours after the reversion treatment, and then to aging. The reversion treatment includes heating at a temperature use rate of 0.4° C./second or more, holding in a temperature range of 200-550° C. for longer than 0 second, and cooling at a rate of 0.5° C./second or more. The ratio of the tensile residual stress ?rs to the 0.2% yield stress ?0.2 after aging and the total content X of Mg and Zn satisfy a condition specified by Expression (1): Y??0.1X+1.4??(1).

Abstract: A door beam including an inner flange extending in a longitudinal direction, an outer flange extending in the longitudinal direction and facing the inner flange at a distance from the inner flange, and-a pair of webs connecting the inner flange and the outer flange. The inner flange has an end portion in the longitudinal direction which is made closer to an end portion of the outer flange such that the distance between the inner and outer flanges at the end portions is shorter than the distance at other portions of the inner and outer flanges.

Abstract: An aluminum alloy member resistant to cracking and having high strengths and excellent stress corrosion cracking resistance is manufactured by crushing a 7xxx aluminum alloy extrudate. Specifically, a 7xxx aluminum alloy extrudate containing Zn of 3.0-8.0%, Mg of 0.4-2.5%, Cu of 0.05-2.0%, and Ti of 0.005-0.2%, in mass percent, and prepared through press quenching is subjected to a reversion treatment, to crushing within 72 hours after the reversion treatment, and then to aging. The reversion treatment includes heating at a temperature rise rate of 0.4° C./second or more, holding in a temperature range of 200-550° C. for longer than 0 second, and cooling at a rate of 0.5° C./second or more. The ratio of the tensile residual stress ?rs to the 0.2% yield stress ?0.2 after aging and the total content X of Mg and Zn satisfy a condition specified by Expression (1): Y??0.1X+1.

Abstract: The present invention relates to a structure for mounting a hook bracket formed of an aluminum alloy extrusion to a bumper reinforce having a hollow cross-section, and further reduces the weight of the hook bracket and the weight of the mount structure without deteriorating towing performance. The hook bracket has a cut that is formed in an extrusion cross-section (a cross-section perpendicular to the direction of extrusion) and extended from the rear end of a shaft portion into the hollow in the bumper reinforce. Further, an internally threaded hole is formed. The shaft portion of the hook bracket is penetrated through a hole formed in front and rear walls of the bumper reinforce and fillet-welded to the front and rear walls. The shaft portion is not fillet-welded to the rear wall at a position where the cut is formed.

Abstract: The present invention relates to a structure for mounting a hook bracket formed of an aluminum alloy extrusion to a bumper reinforce having a hollow cross-section, and further reduces the weight of the hook bracket and the weight of the mount structure without deteriorating towing performance. The hook bracket has a cut that is formed in an extrusion cross-section (a cross-section perpendicular to the direction of extrusion) and extended from the rear end of a shaft portion into the hollow in the bumper reinforce. Further, an internally threaded hole is formed. The shaft portion of the hook bracket is penetrated through a hole formed in front and rear walls of the bumper reinforce and fillet-welded to the front and rear walls. The shaft portion is not fillet-welded to the rear wall at a position where the cut is formed.

Abstract: A bumper reinforcement is formed of a 7000 series aluminum alloy hollow extrusion and has crushed end portions. A portion of the end portions is heated to a temperature of 400° C. or more for reversion treatment, the heated portion is subjected to cold crushing, and then the whole bumper reinforcement is subjected to age hardening. Because of the age hardening, the heated portion has higher Vickers hardness than non-heated portions by Hv 10 or more. This compensates for a decrease in reaction force in a collision of an end portion resulting from a decrease in the section modulus of the crushed portion and thereby suppresses a decrease in energy absorption.

Abstract: There is provided a bumper beam that is formed of a 7000 series aluminum alloy hollow extrusion, has a crushed longitudinal portion, and locally has a low-hardness region in a bumper stay joint section. A portion (portion to be heated) of end portions of the bumper beam formed of a tempered member of a heat-treatable aluminum alloy extrusion is subjected to reversion treatment, thereby forming a heat-affected zone in a bumper stay joint section. An end region (portion to be crushed) of the heated portion is subjected to cold crushing, and then the whole bumper beam is subjected to age hardening. The heated portion and a non-heat-affected zone are hardened through the age hardening, thereby forming a low-hardness region that overlaps the joint section in a portion of the heat-affected zone.

Abstract: A bumper reinforcement includes a tubular body including a front wall that serves as an impact surface and a rear wall on a vehicle body side, the tubular body extending in a vehicle width direction and having a hollow cross section; and a tow hook attachment structure for allowing a tow hook to be removably attached thereto. The tow hook attachment structure includes a pair of cylindrical protrusions respectively integrally formed with the front and rear walls of the tubular body by shaping parts of the walls, the cylindrical protrusions being disposed at predetermined positions on the front and rear walls in the vehicle width direction so as to face each other and so as to protrude inward into the hollow cross section, and at least one of the pair of protrusions includes a threaded portion for allowing a threaded portion of the tow hook to be screwed thereinto.

Abstract: An anti-collision component consisting of a metal hollow profile for automobiles includes a collision side flange, a body side flange, and a web connected to the flanges. The hollow profile has a longitudinal end at which a cross-sectional configuration is deformed by swaging to reduce a dimension between the flanges. The following relations are established: tW>TW RCI?(tW?TW) where tW is a wall thickness of the web at the end, TW is a wall thickness of the web at a portion where the cross-sectional configuration is not deformed, and RCI is an inside corner radius of a corner formed of the web and each flange at the portion.

Abstract: An anti-collision component consisting of a metal hollow profile for automobiles includes a collision side flange, a body side flange, and a web connected to the flanges. The hollow profile has a longitudinal end at which a cross-sectional configuration is deformed by swaging to reduce a dimension between the flanges. The following relations are established: tW>TW RCI?(tW-TW) where tW is a wall thickness of the web at the end, TW is a wall thickness of the web at a portion where the cross-sectional configuration is not deformed, and RCI is an inside corner radius of a corner formed of the web and each flange at the portion.

Abstract: There is provided a bumper beam that is formed of a 7000 series aluminum alloy hollow extrusion, has a crushed longitudinal portion, and locally has a low-hardness region in a bumper stay joint section. A portion (portion to be heated) of end portions of the bumper beam formed of a tempered member of a heat-treatable aluminum alloy extrusion is subjected to reversion treatment, thereby forming a heat-affected zone in a bumper stay joint section. An end region (portion to be crushed) of the heated portion is subjected to cold crushing, and then the whole bumper beam is subjected to age hardening. The heated portion and a non-heat-affected zone are hardened through the age hardening, thereby forming a low-hardness region that overlaps the joint section in a portion of the heat-affected zone.

Abstract: A bumper reinforcement is formed of a 7000 series aluminum alloy hollow extrusion and has crushed end portions. A portion of the end portions is heated to a temperature of 400° C. or more for reversion treatment, the heated portion is subjected to cold crushing, and then the whole bumper reinforcement is subjected to age hardening. Because of the age hardening, the heated portion has higher Vickers hardness than non-heated portions by Hv 10 or more. This compensates for a decrease in reaction force in a collision of an end portion resulting from a decrease in the section modulus of the crushed portion and thereby suppresses a decrease in energy absorption.

Abstract: A bumper reinforcement includes a tubular body including a front wall that serves as an impact surface and a rear wall on a vehicle body side, the tubular body extending in a vehicle width direction and having a hollow cross section; and a tow hook attachment structure for allowing a tow hook to be removably attached thereto. The tow hook attachment structure includes a pair of cylindrical protrusions respectively integrally formed with the front and rear walls of the tubular body by shaping parts of the walls, the cylindrical protrusions being disposed at predetermined positions on the front and rear walls in the vehicle width direction so as to face each other and so as to protrude inward into the hollow cross section, and at least one of the pair of protrusions includes a threaded portion for allowing a threaded portion of the tow hook to be screwed thereinto.