Method for producing a ring-shaped or plate-like element

Patent metadata

Field	Value
Publication number	US-10684102-B2
Application number	US-201715498984-A
Country	US
Kind code	B2
Filing date	Apr 27, 2017
Priority date	Sep 17, 2010
Publication date	Jun 16, 2020
Grant date	Jun 16, 2020

Abstract

The invention relates to a method for producing a ring-shaped or plate-like element, in particular for a metal-sealing material-feedthrough, in particular for devices which are subjected to high pressures, for example igniters for airbags or belt tensioning devices, whereby a blank, especially in the embodiment of a wire-shaped material is provided and the blank is subjected to processing so that a feedthrough-opening can be incorporated into a ring-shaped or plate-like element created from the blank.

First claim

What is claimed is:

1. A method for producing a ring-shaped or plate-like element for a metal-sealing material-feedthrough for a plurality of devices which are subjected to high pressures, said method comprising the steps of:
providing a blank; and
subjecting said blank to a processing so that a feedthrough opening with a diameter DFT can be incorporated into said element created from said blank, wherein said processing of said blank includes incorporation of a relief region with a diameter DRE, said diameter DRE being greater than the diameter DFT of the feedthrough opening, wherein said blank is formed from a wire-shaped material and said processing of said blank includes a cold-forming process.

2. The method according to claim 1 , wherein the diameter of the relief region DRE is 1.1 to 5 times greater than the diameter of the feedthrough opening DFT.

3. The method according to claim 1 , wherein the diameter of the relief region DRE is 1.1 to 2 times greater than the diameter of the feedthrough opening DFT.

4. The method according to claim 1 , wherein the relief region is located in the center of the element and the diameter of the relief region DRE is calculated by DRE=DOV−2×DW, wherein DOV is the overall diameter of the element and DW is the length or thickness of the wall surrounding the relief region.

5. The method according to claim 1 , wherein the feedthrough opening is punched through said element and the thickness DR of the feedthrough opening is at maximum 1.5 times greater than the diameter DFT of the feedthrough opening.

6. The method according to claim 1 , wherein said plurality of devices includes at least one of an igniter for an airbag and a belt tensioning device.

7. The method according to claim 1 , wherein said cold-forming process includes compression.

8. The method according to claim 1 , wherein said element has an essentially round outside contour and said feedthrough opening is located in a center.

9. The method according to claim 1 , wherein, after producing said relief region, a punching tool having a diameter corresponding to the diameter of the feedthrough opening DFT which is smaller than the diameter of the relief region DRE is provided in an area associated with said relief region in order to punch out said feedthrough opening.

10. The method according to claim 9 , wherein said punching tool is a stance needle.

11. The method according to claim 9 , wherein cold forming said element from said blank occurs in a first amount of time, providing said relief region occurs in a second amount of time, and punching said feedthrough opening into said element occurs in a third amount of time, wherein the first amount of time, the second amount of time, and the third amount of time are essentially the same.

12. The method according to claim 1 , wherein the produced element includes bent flow lines adjacent to the relief region.

13. A method for producing a ring-shaped or plate-like element for a metal sealing material-feedthrough for a plurality of devices which are subjected to high pressures, the method comprising the steps of:
providing a wire-shaped material as a blank;
cold-forming the blank, whereby relatively geometric dimensions of the blank are changed, resulting in the ring-shaped or plate-like element; and
subjecting said element to a processing so that a feedthrough opening with a diameter DFT is incorporated into said element created from said blank, wherein said processing of said element includes incorporation of a relief region with a diameter DRE, said diameter DRE being greater than the diameter DFT of the feedthrough opening.

14. The method according to claim 13 , wherein, to incorporate the relief region, said blank or said element is pressed against a punch and a material of said blank or said element flows around said punch.

15. The method according to claim 14 , wherein, after producing said relief region, a punching tool having a diameter corresponding to the diameter of the feedthrough opening DFT which is smaller than the diameter of the relief region DRE is provided in an area associated with said relief region in order to punch out said feedthrough opening.

16. The method according to claim 15 , wherein said punching tool is a stance needle.

17. The method according to claim 15 , wherein cold forming said element from said blank occurs in a first amount of time, providing said relief region occurs in a second amount of time, and punching said feedthrough opening into said element occurs in a third amount of time, wherein the first amount of time, the second amount of time, and the third amount of time are essentially the same.

Assignees

• Schott Ag

Inventors

• Hartl Helmut
• Pfeiffer Thomas

Classifications

• Y10T29/49908

  Joining by deforming · CPC title

• B60R2021/26029

  Ignitors · CPC title

• B21K1/761

  rings · CPC title

• B21J1/025

  affecting grain orientation · CPC title

• B23P15/00

  Making specific metal objects by operations not covered by a single other subclass or a group in this subclass · CPC title