Method for manufacturing a bumper bar
AssigneeAccra Teknik AB
InventorsAnders Sundgren, Mats Lindberg, Göran Berglund
Life of this patent
Estimating the term…
Abstract
In a bumper bar for vehicles, the bar is extended in one dimension, has a closed cross-section and two ends and includes at least one front flange, one rear flange, one top side and one bottom side. The bumper bar has at least one part of the rear flange, lying along the bar, in contact with at least one part of the front flange, also lying along the bar. In the method for manufacturing the bumper bar, the at least one part of the rear flange is wholly or partially pressed in towards the at least one part of the front flange.
Claims23
Method for manufacturing a bumper bar for a vehicle, comprising the steps of:
- (a) providing metal material to make the bar;
- (b) forming the metal material into a tubular extended element with a front flange for facing forwards in the same direction of motion of the vehicle and a rear flange with grooves therein, a top side and a bottom side, the tubular extended element having a closed cross-section and at least one bend between the rear flange and top side and at least one bend between the rear flange and the bottom side;
- and
- (c) shaping the tubular extended element by pressing at least one part of the rear flange against at least one part of the front flange with the bends acting as guides facilitating the pressing and the grooves in the rear flange being drawn out during the pressing and facilitating the shaping.
Method for manufacturing a bumper bar for a vehicle, comprising the steps of:
- (a) providing material to make the bar;
- (b) forming from the material a front flange of the bar for facing forward in the same direction of motion of the vehicle, a rear flange of the bar in a nonadjacent relationship, to the front flange, a top side of the bar extending between the front and rear flanges and a bottom side of the bar extending between the front and rear flanges;
- (c) heating the material to a chosen austenitizing temperature based on the material of the bar;
- and
- (d) shaping the material in a forming tool in which at least one part of the rear flange, lying along the bar, is pressed in against at least one part of the front flange, also lying along the bar.
Dependencies are inferred from the claim text.