Method for the production of a closed hollow profile for a vehicle axle

A method for the production of a closed hollow profile for a vehicle axle comprising the following steps:

• a) providing a board made of sheet metal, wherein the board has at least a length (L) in a longitudinal direction and at least a width (B) in a transverse direction, wherein lateral surfaces of the board extend in the transverse direction,
• b) forming the board, wherein an open profile having a channel extending in the longitudinal direction of the board is created, wherein the lateral surfaces remain extending in the transverse direction,
• c) forming the board, wherein the channel is deformed in an opposite direction from a direction in which the channel is created in step b), wherein the lateral surfaces remain extending in the transverse direction,
• d) forming the lateral surfaces of the board, wherein a hollow profile having a circumference (U) and having a longitudinal gap is created, and wherein the lateral surfaces of the board are formed to extend in a direction substantially perpendicular to the transverse direction after the channel is deformed in the opposite direction from the direction in which the channel is created in step b);
• and
• e) joining of the longitudinal gap,
• wherein the board is formed such that a compressive stress is generated at least in a region of the longitudinal gap.