Bumper reinforcement

A vehicle bumper apparatus comprising:

• a bumper reinforcement and
• a supporting member, wherein
• the bumper reinforcement is made of a single section light alloy extruded material including a hollow cross-section and configured to be arranged at a vehicle to be extended in a vehicle width direction, the bumper reinforcement includes end portions each of which is bent toward a vehicle body side, the end portions of the bumper reinforcement are configured to be assembled on the vehicle body via the supporting member,
• the hollow cross-section of the light alloy extruded material of the bumper reinforcement includes a closed cross-section at an intermediate portion provided between the end portions and includes an open cross-section provided with an opening formed at the vehicle body side of the hollow cross-section at each of the end portions,
• each of the end portions is formed in a manner that a thickness of the hollow cross-section of each of the end portions in a vehicle front-rear direction is gradually reduced toward an end of each of the end portion,
• the supporting member includes a connecting portion, and each of the openings of the bumper reinforcement is at least partially closed with the connecting portion and is restricted from being expanded,
• the openings facilitate processing for gradually reducing, by bending, the thickness of the end portions, and
• a width of the opening is reduced by the processing by gradually reducing the thickness of the end portions.