Expanded tube for a motor vehicle crash box and manufacturing method for it
AssigneeOutokumpu Oyj
InventorStefan Lindner
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Abstract
The present invention relates to a motor vehicle crash box with a working direction in vehicle's longitudinal axis manufactured out of a tube which is expanded into different zones, wherein the zones are different in strength and diameter by using steel after forming a homogenous austenitic microstructure with a strain hardening effect. The present invention further relates to the manufacturing method of such a component.
Claims14
A motor vehicle crash box with a working direction in a vehicle's longitudinal axis, wherein the component is manufactured out of a tube which is made of an austenitic steel which has a homogeneous austenitic microstructure with a strain hardening effect even after forming, which is expanded by a forming process into an expanded tube having at least three zones, each zone having a different material strength and a different diameter;
- wherein a center of the expanded tube in longitudinal direction works as a mirror axis and the zones are characterized in a way that starting from the outer-sides to the center, the diameter of each respective zone of the at least three zones decreases towards the center.
Dependencies are inferred from the claim text.