Backward extrusion process for inner profiles
AssigneeGKN Driveline International GmbH
InventorsUlrich Brochheuser, Andreas Gehrke
Life of this patent
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Abstract
A process of producing an inner profile (18) in a tube or hollow profile (11) includes inserting the tube or hollow profile (11) into a supporting sleeve (12), with a first tube end (19) being axially supported; placing a pressure-loaded annular die 16 on to the other tube end (20); pressing a forming die (15) with an outer profile into the tube or hollow profile (11) from the latter tube end (20) for producing the inner profile (18); allowing a return of the annular die (16) under a pressure load in the opposite direction of that of pressing in the forming die (15).
Claims12
A process of producing an inner profile in a tube or hollow profile comprising:
- inserting the tube or hollow profile into a supporting sleeve, with a first tube end being axially supported;
- placing a pressure-loaded annular die on to a second tube a end;
- pressing a forming die with an outer profile into the tube or hollow profile from the second tube end for producing the inner profile;
- and
- allowing a return of the annular die under a pressure load in the opposite direction of that of pressing in the forming die.
-5. (canceled)
Dependencies are inferred from the claim text.