Molding Tool for Producing Hot-Formed Components

• US 20170225214A1
• Filed: 04/26/2017
• Published: 08/10/2017
• 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
• Granted Patent: US 10,537,928 B2
• Time in Patent Office: 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 such as a formed sheet metal part, 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.

2. The molding tool according to claim 1, wherein the at least one clearance is configured so as to be variable in volume.

3. The molding tool according to claim 1, wherein the at least one of the tool lower and upper parts which includes the at least one clearance has an insert therein that forms a tool-side rear wall of the air chamber.

4. The molding tool according to claim 2, wherein the at least one of the tool lower and upper parts which includes the at least one clearance has an insert therein that forms a tool-side rear wall of the air chamber.

5. The molding tool according to claim 3, 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.

6. The molding tool according to claim 5, wherein the insert is displaceable in a linear manner.

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

8. The molding tool according to claim 6, wherein the insert in a closed state of the molding tool is in a retracted position in order for the at least one clearance to be generated.

9. The molding tool according to claim 5, wherein the insert in an opened state of the molding tool is in an advanced position in which a volume of the at least one clearance is reduced in relation to a volume of the at least one clearance in a retracted position of the insert.

10. The molding tool according to claim 8, wherein the insert in an opened state of the molding tool is in an advanced position in which a volume of the at least one clearance is reduced in relation to a volume of the at least one clearance in a retracted position of the insert.

11. The molding tool according to claim 3, wherein the insert includes ducts therein.

12. The molding tool according to claim 10, wherein the insert includes ducts therein.

13. 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.

14. The molding tool according to claim 13, wherein the formed sheet metal part is configured at least in part from one of steel, aluminum and magnesium.

15. The molding tool according to claim 3, wherein the insert is configured from metal, non-metal, or a combination thereof.

16. The molding tool according to claim 15, wherein the non-metal includes concrete and wood.