Molding tool for producing hot-formed components

• US 10,537,928 B2
• Filed: 04/26/2017
• Issued: 01/21/2020
• Est. Priority Date: 10/29/2014
• Status: Active Grant

• Current Assignee: Bayerische Motoren Werke AG
• Original Assignee: Bayerische Motoren Werke AG
• Inventors: Becker, Juergen, Kupetz, Bernd
• Primary Examiner(s): Ekiert, Teresa M
• Application Number:
  US15/497,769
• Publication Number:
  US 20170225214A1
• Time in Patent Office: 1,000 Days
• CPC Class Codes: B21D 22/022 by heating the blank or stamping associated with heat treatment C21D takes precedence
• CPC Class Codes: B21D 22/06 having relatively-movable die parts
• CPC Class Codes: B21D 22/208 by heating the blank or deep-drawing associated with heat treatment C21D takes precedence
• CPC Class Codes: B21D 37/16 Heating or cooling

Abstract

A molding tool is provided for producing hot-formed components, in particular formed sheet metal parts. The molding tool includes a tool lower part and a tool upper part which are movable in relation to each other, and which include corresponding operative faces for shaping a hot-formed component. The operative face of at least one of the tool parts is configured so as to be coolable and that tool part includes cooling lines therein. At least one of the tool parts includes a clearance which in a closed state of the molding tool, conjointly with the hot-formed component, forms an air chamber. The air chamber functions as a thermal insulator between the hot-formed component and the tool part.

Claims

1. A molding tool for producing a hot-formed component, comprising:

a tool lower part and a tool upper part which are movable in relation to each other, and which include corresponding operative faces for shaping the component, where the operative face of at least one of the tool lower and upper parts is at least in part configured so as to be coolable and the at least one of the tool lower and upper parts includes cooling lines therein,

wherein

at least one of the tool lower and upper parts includes at least one clearance which in a closed state of the molding tool, conjointly with the component, forms an air chamber which functions as a thermal insulator between the component and the at least one of the tool lower and upper parts which includes the at least one clearance defined on at least one side by the component,

the at least one of the tool lower and upper parts which includes the at least one clearance has an insert in the at least one clearance that forms a tool-side rear wall of the air chamber,

the at least one clearance is configured so as to be variable in volume, and

the molding tool is configured such that in an opened state of the molding tool the insert is in an advanced position in which the insert is closer to the operative faces of the tool upper and lower parts than when the insert is in a retracted position away from the operative faces.

2. The molding tool according to claim 1, wherein the insert is movably disposed in the at least one of the tool lower and upper parts which includes the at least one clearance.

3. The molding tool according to claim 2, wherein the insert is displaceable in a linear manner.

4. The molding tool according to claim 3, wherein when the molding tool is in a closed state the insert is in a retracted position in order for the at least one clearance to be generated.

5. The molding tool according to claim 2, wherein when the molding tool is in a closed state the insert is in a retracted position in order for the at least one clearance to be generated.

6. The molding tool according to claim 1, wherein the insert includes ducts therein.

7. The molding tool according to claim 1, wherein the hot-formed component is a formed sheet metal part configured from either a ferrous metal or a non-ferrous metal.

8. The molding tool according to claim 7, wherein the formed sheet metal part is configured at least in part from one of steel, aluminum and magnesium.

9. The molding tool according to claim 1, wherein the insert is configured from metal, non-metal, or a combination thereof.

10. The molding tool according to claim 9, wherein the non-metal includes concrete and wood.