Fastening method and fastening system

Patent metadata

Field	Value
Publication number	US-11927211-B2
Application number	US-201816499000-A
Country	US
Kind code	B2
Filing date	Apr 18, 2018
Priority date	Apr 19, 2017
Publication date	Mar 12, 2024
Grant date	Mar 12, 2024

Abstract

Disclosed are a fastening system and a method for fastening a fastening element made of a first material to a substrate made of a substrate material. A blind hole is made in the substrate, and a fastening element is anchored in the blind hole. A shaft of the fastening element defines a fastening direction and has a circumferential surface which is slanted or stepped in relation to the fastening direction.

First claim

The invention claimed is:

1. A method of fastening a fastening element consisting of a first material to a substrate consisting of a substrate material, the method comprising:
creating a blind hole defining a depth direction with a blind hole diameter in the substrate,
providing a fastening element which has a shaft defining a fastening direction having an end face pointing in the fastening direction and having a circumferential surface adjoining directly to the end face, wherein the end face has outer dimensions,
driving the shaft into the blind hole to anchor the fastening element in the blind hole, wherein the outer dimensions of the end face exceed the blind hole diameter, so that when driven into the blind hole the shaft displaces a part of the substrate material in the depth direction and is welded on the substrate at the circumferential surface,

wherein the circumferential surface is slanted relative to the fastening direction, and wherein an angle of inclination of the circumferential surface relative to the fastening direction is between 1° and 6°.

2. The method according to claim 1 , wherein the fastening element has an anchoring region, which is anchored in the blind hole and includes the shaft, and a connecting region protruding from the fastening element after the anchoring region, for connecting an attachment to the fastening element.

3. The method according to claim 2 , wherein a cross-sectional area of the shaft oriented perpendicular to the fastening direction has external dimensions, which increase steadily along the fastening direction starting from the end face.

4. The method according to claim 2 , wherein the circumferential surface has the shape of a truncated cone.

5. The method according to claim 1 , wherein a cross-sectional area of the shaft oriented perpendicular to the fastening direction has external dimensions, which increase steadily along the fastening direction starting from the end face.

6. The method according to claim 5 , wherein the cross-sectional area has the shape of a circle, and wherein the outer dimensions comprise a diameter of the circle.

7. The method according to claim 5 , wherein the circumferential surface has the shape of a truncated cone.

8. The method according to claim 1 , wherein the shaft is driven into the blind hole in a linear manner.

9. The method according to claim 8 , comprising driving the shaft into the blind hole in a linear manner by a bolt-firing tool.

10. The method according to claim 1 , wherein the first material and/or the substrate material comprises a metal or an alloy.

11. The method according to claim 10 , wherein the first material and/or the substrate material consists of a metal or an alloy.

12. The method according to claim 1 , wherein the circumferential surface has the shape of a truncated cone.

13. The method according to claim 1 , wherein the circumferential surface has a plurality of different angles of inclination relative to the fastening direction, starting from the end face against the fastening direction.

14. The method according to claim 1 , wherein the outer dimensions of the end face include an end face diameter, and wherein the blind hole diameter is at least 0.1 mm smaller than the end face diameter.

15. The method according to claim 1 , wherein the outer dimensions of the end face include an end face diameter, and wherein the blind hole diameter is less than 0.98 times the end face diameter.

16. A fastening system comprising a substrate consisting of a substrate material and a fastening element, which has a shaft defining a fastening direction having an end face pointing in the fastening direction and having a circumferential surface adjoining directly to the end face, wherein the shaft is welded on the substrate, wherein the circumferential surface is slanted relative to the fastening direction, and wherein an angle of inclination of the circumferential surface relative to the fastening direction is between 1° and 6°.

17. The fastening system according to claim 16 , wherein a cross-sectional area of the shaft oriented perpendicular to the fastening direction has external dimensions, which increase steadily along the fastening direction starting from the end face.

18. The fastening system according to claim 17 , wherein the cross-sectional area has shape of a circle, and has outer dimensions comprising a diameter of the circle.

19. The fastening system according to claim 16 , wherein the fastening element has an anchoring region, which is anchored in the blind hole and includes the shaft, and has a connecting region protruding from the fastening element after the anchoring region, for connecting an attachment to the fastening element.

20. The fastening system according to claim 16 , wherein the circumferential surface has shape of a truncated cone.

21. The fastening system according to claim 16 , wherein the circumferential surface has a plurality of different angles of inclination relative to the fastening direction, starting from the end face against the fastening direction.

22. The fastening system according to claim 16 , wherein the first material and/or the substrate material comprises a metal or an alloy.

23. The fastening system according to claim 16 , wherein the end face has outer dimensions including an end face diameter, and wherein the shaft is driven into a blind hole to anchor the fastening element in the blind hole, the blind hole having a blind hole diameter, and the blind hole diameter is at least 0.1 mm smaller than the end face diameter.

24. The fastening system according to claim 16 , wherein the end face has outer dimensions including an end face diameter, and wherein the shaft is driven into a blind hole to anchor the fastening element in the blind hole, the blind hole having a blind hole diameter, and the blind hole diameter is less than 0.98 times the end face diameter.

25. A method of fastening a fastening element consisting of a first material to a substrate consisting of a substrate material, the method comprising:
creating a blind hole defining a depth direction with a blind hole diameter in the substrate,
providing a fastening element which has a shaft defining a fastening direction having an end face pointing in the fastening direction and having a circumferential surface adjoining directly to the end face, wherein the end face has outer dimensions,
driving the shaft into the blind hole to anchor the fastening element in the blind hole,
wherein the outer dimensions of the end face exceed the blind hole diameter, so that when driven into the blind hole the shaft displaces a part of the substrate material in the depth direction and is welded on the substrate at the circumferential surface, wherein the circumferential surface is stepped relative to the fastening direction, and wherein an angle of inclination of the circumferential surface relative to the fastening direction is between 1° and 6°.

26. A fastening system comprising a substrate consisting of a substrate material and a fastening element, which has a shaft defining a fastening direction having an end face pointing in the fastening direction and having a circumferential surface adjoining directly to the end face, wherein the shaft is welded on the substrate, and wherein the circumferential surface is stepped relative to the fastening direction, wherein an angle of inclination of the circumferential surface relative to th

Assignees

• Hilti Ag

Inventors

• Popp Uwe
• Stahel Simon
• Schneider Jens

Classifications

• F16B4/004 Primary

  Press fits, force fits, interference fits, i.e. fits without heat or chemical treatment (F16B4/002 takes precedence) · CPC title

• F16B4/006 Primary

  Shrinkage connections, e.g. assembled with the parts being at different temperature · CPC title

• F16B4/00 Primary

  Shrinkage connections, e.g. assembled with the parts at different temperature; Force fits (restricted to metal parts or objects B23P11/02); Non-releasable friction-grip fastenings (F16B2/00 takes precedence) · CPC title

• F16B5/08

  by means of welds or the like (welding B23K) · CPC title