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US 8,555,693 B2Granted
Method for forming hollow profiles
AssigneeGKN Driveline International GmbH
InventorsUlrich Brochheuser, Andreas Gehrke
Life of this patent
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Abstract
A method for forming hollow profiles is disclosed. In one exemplary method, a hollow profile is guided through a die in a processing direction and fixed by a mandrel such that at the die, the hollow profile has a material flow velocity in this processing direction (2), in which the method the mandrel has a drawing velocity in the processing direction that is greater than the material flow velocity.
Claims9
A method for forming hollow profiles, comprising;
- guiding a hollow profile through a die in a processing direction whereby the hollow profile is fixed by a mandrel such that at the die the hollow profile has a material flow velocity in the processing direction, in which the mandrel is moved in the processing direction at a velocity that is greater than the material flow velocity in a gap between the die and the mandrel, thereby creating a sliding friction force between the mandrel and the hollow profile, so that a second force transmission point for a force, which assists the forming operation in the processing direction, is obtained.
Dependencies are inferred from the claim text.