Hollow molded part with closed cross-section and a reinforcement
Assigneefischer Hydroforming GmbH
InventorBernd Schulze
Life of this patent
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Abstract
The invention relates to a hollow molded part with a closed cross-section and a reinforcement, wherein the hollow molded part is formed as a single piece and exhibits a blank mold, with the first region (1) with a first starting outer diameter (D1) and the starting wall thickness (b1), and at least a second region (2) with an outer diameter reducing in comparison to the starting outer diameter (D1) and having an increased wall thickness in comparison to the starting wall thickness (b1), wherein the increased wall thickness forms a reinforcement.
Claims17
Hollow molded part made of a metallic material and produced out of a mold blank by inner high pressure metal forming and having a closed cross-section and a reinforcement characterized in that the hollow molded part is formed as a single piece and exhibits a blank mold, wherein the blank mold is furnished
- with a first region (1) with a first starting outer diameter (D1) and a starting wall thickness (b1), and
- with at least one second region (2) with an outer diameter reduced in comparison to the starting outer diameter (D1) and with an increased wall thickness in comparison to the starting wall thickness (b1), wherein the increased wall thickness forms a reinforcement.
Method for production of a hollow molded part made of a metallic material and produced out of a tubular starting part (A) having a starting outer diameter (D1) and a starting wall thickness (b 1), characterized in that
- initially the tubular starting part (A) is reduced by a radial or tangential deformation method over at least a second region (2) conically with an angle (α) and over at least a third region (3) cylindrically to a smaller diameter (D2) and therewith a mold blank having an increased wall thickness (b2) relative to the starting wall thickness (b1) in the second region (2) and in the third region (3) and that in the following the hollow form part is formed by inner high pressure metal forming of the mold blank in the first region and/or in the second region.
A method for production of a hollow molded part comprising
- forming a tubular starting part (A) having a starting outer diameter (D1) and a starting wall thickness (b 1) out of a metallic material;
- initially reducing the tubular starting part (A) by a radial or tangential deformation method over at least a second region (2) conically with an angle (α) and over at least a third region (3) cylindrically to a smaller diameter (D2);
- generating a mold blank (V) having an increased wall thickness (b2) relative to the starting wall thickness (b1) in the second region (2) and in the third region (3);
- forming in the following a hollow form part by inner high pressure metal forming of the mold blank in a first region and/or in the second region.
Dependencies are inferred from the claim text.