Weld stud for drawn-arc stud welding

Patent metadata

Field	Value
Publication number	US-10183354-B2
Application number	US-201615345643-A
Country	US
Kind code	B2
Filing date	Nov 8, 2016
Priority date	Jul 30, 2014
Publication date	Jan 22, 2019
Grant date	Jan 22, 2019

Abstract

A weld stud for drawn-arc stud welding has a functional portion and a welding portion which represents one end of the weld stud and which is delimited by a front face that is curved outwards in a longitudinal direction of the weld stud.

First claim

What is claimed is:

1. A weld stud for drawn-arc stud welding, comprising:
a functional section; and
a welding section which forms an end of the weld stud for drawn-arc stud welding and which is delimited by a face surface which is domed outwardly in a longitudinal direction of the weld stud, wherein
the face surface transitions in a continuous fashion, without an edge, into a side surface which delimits the welding section,
the welding section has a conical section which adjoins the face surface and whose diameter widens, proceeding from a diameter of the face surface, with increasing distance from the face surface, and
a shell surface of the conical section forms, relative to a longitudinal axis of the weld stud, an angle ranging from 15° to 25°.

2. The weld stud according to claim 1 , wherein
the face surface is of rotationally symmetrical form with respect to a longitudinal axis of the weld stud.

3. The weld stud according to claim 1 , wherein
the face surface is of rotationally symmetrical form having a shape of a spherical segment, a segment of an ellipsoid or a segment of an elliptical paraboloid.

4. The weld stud according to claim 1 , wherein
the face surface has, in the longitudinal direction of the weld stud, a dome height of at least 1.5 mm or more.

5. The weld stud according to claim 1 , wherein
the face surface has, in the longitudinal direction of the weld stud, a dome height of at least 2 mm or more.

6. The weld stud according to claim 1 , wherein
the functional section has a thread, and the face surface has a diameter which is at least as large as a core diameter of the thread.

7. The weld stud according to claim 1 , wherein the weld stud is manufactured in one piece from an aluminum alloy.

8. The weld stud according to claim 1 , wherein
the face surface and the side surface have a common tangent at a common boundary thereof.

9. A method of performing drawn-arc stud welding, the method comprising the acts of:
providing a weld stud having a functional section including a flange and a welding section adjoining the flange, the welding section including a face surface and a side surface, the side surface including a conical area adjoining the face surface and a concave area connecting the conical area to the flange, the welding section forming an end of the weld stud and being delimited by the face surface that is domed outwardly in a longitudinal direction of the weld stud, and transitions in a continuous fashion, without an edge, into the side surface, wherein
a diameter of the conical area widens, proceeding from a diameter of the face surface, with increasing distance from the face surface, and wherein a shell surface of the conical area forms, relative to a longitudinal axis of the weld stud, an angle ranging from 15° to 25°; and
performing drawn-arc stud welding using the provided weld stud on a vehicle body, a chassis component, or a battery component.

10. The method according to claim 9 , wherein the face surface is of rotationally symmetrical form with respect to a longitudinal axis of the weld stud.

11. The method according to claim 9 , wherein
the face surface has, in the longitudinal direction of the weld stud, a dome height of at least 1.5 mm or more.

Assignees

• Bayerische Motoren Werke Ag

Inventors

• Kerscher Erich
• Holzner Reinhard

Classifications

• B23K35/286

  Al as the principal constituent · CPC title

• B23K9/207 Primary

  Features related to studs · CPC title

• B23K35/0288

  Welding studs · CPC title