Welding auxiliary joining part and method for connecting components by way of said welding auxiliary joining part

Patent metadata

Field	Value
Publication number	US-2019321908-A1
Application number	US-201916502152-A
Country	US
Kind code	A1
Filing date	Jul 3, 2019
Priority date	Sep 25, 2012
Publication date	Oct 24, 2019
Grant date	—

Abstract

A welding auxiliary joining part is disclosed in the shape of a stud having a head, a shank and a tip. The welding auxiliary joining part is driven in by means of a mechanical-thermal setting method into a component of non- or poorly weldable material. During the driving in, a welding head is created due to mechanical deformation so that the component may be connected subsequently via the welding auxiliary joining part to a further component of weldable material by means of welding.

First claim

1 . Preparation method of a first component of electrically conductive or non-conductive material by providing a welding auxiliary joining part therein to a later fastening to at least a second component of weldable material or having a portion of weldable material by a later welding of the welding auxiliary joining part to the at least one second component, wherein the preparation method comprises the following steps:
a. driving of the welding auxiliary joining part into the at least one first component by means of a combined mechanical-thermal load of at least the welding auxiliary joining part, wherein no waste material is separated from the at least one first component, and b. deforming the welding auxiliary joining part under combined mechanical-thermal load at a die at an exit location out of the first component so that a weld head of the welding auxiliary joining part is created.

2 . The preparation method according to claim 1 , wherein the welding auxiliary joining part is a stud having a head or at least a tip portion, in which a head diameter is larger than a maximum thickness of the tip portion, or wherein the welding auxiliary joining part is a stud having a head, in which a head diameter does not exceed a maximum thickness of the tip portion.

3 . The preparation method according to claim 2 first alternative, wherein the head of the welding auxiliary joining part has a circular groove at a side facing the tip portion for receiving a material deformation of a component adjacent to the head.

4 . The preparation method according to claim 2 first alternative, wherein the tip portion has an ogival tip having an ogivality factor in the range of 1 to 10 or a conical, a round, a parabolic or a pyramid-shaped design.

5 . The preparation method according to claim 1 , wherein the driving in by the mechanical-thermal load accelerates the welding auxiliary joining part up to a speed in the range of >0.5 m/s to 5 m/s, preferably 1 m/s to 4 m/s.

6 . The preparation method according to claim 1 , further comprising:
compressing the welding auxiliary joining part at the die which is arranged at the exit location of the welding auxiliary joining part out of the at least one first component.

7 . The preparation method according to claim 1 , wherein
the at least one first component consists of an electrically non-conductive material, and the welding auxiliary joining part is driven in by an electrode punch and is guided by an electrode blank holder.

8 . The preparation method according to claim 7 , wherein the electrode punch and the electrode blank holder have different electrical polarities so that a current flows between the electrode punch and the electrode blank holder via the welding auxiliary joining part which heats at least the welding auxiliary joining part.

9 . The preparation method according to claim 1 , wherein
the at least one first component consists of an electrically conductive material, and the welding auxiliary joining part is driven in by an electrode punch and is guided by an electrode blank holder which is electrically insulated with respect to the welding auxiliary joining part, wherein a supporting electrode die is electrically insulated.

10 . The preparation method according to claim 9 , wherein the electrode punch and the electrode blank holder have different polarities so that a current flows between the electrode punch and the electrode blank holder via the welding auxiliary joining part and the first component, and heats at least the welding auxiliary joining part.

11 . The preparation method according to claim 1 , wherein the at least one first component consists of an electrically conductive material, and the welding auxiliary joining part is driven in by an electrode punch.

12 . The preparation method according to claim 11 , wherein the electrode punch and an electrode die have different polarities so that a current flows between the electrode punch and the electrode die via the welding auxiliary joining part and the first component which heats at least the welding auxiliary joining part.

13 . At least a first component of a weldable or a non-weldable or poorly weldable material, which has been prepared via a weldable welding auxiliary joining part set into the at least one first component and having a mechanically-thermally deformed tip portion for a later welding of the welding auxiliary joining part to at least one second component, especially by the preparation method according to claim 1 .

14 . A discontinuously proceeding mechanical-thermal setting-welding method by a welding auxiliary joining part for connecting at least one first component without pre-punching the at least one first component with at least one second component of weldable material or having a portion of weldable material, wherein the setting-welding method is separated into a preparation phase of the at least one first component to a connecting with the at least one second component and a fastening phase of the at least one first component at the at least one second component, and the fastening phase takes place at a later time compared to the preparation phase, wherein the discontinuously proceeding mechanical-thermal setting-welding method comprises the following steps:
a. driving of the welding auxiliary joining part into the at least one first component by a combined mechanical-thermal load of at least the welding auxiliary joining part, wherein no waste material is separated from the at least one first component, b. deforming the welding auxiliary joining part under combined mechanical-thermal load at a die at an exit location out of the first component so that a weld head of the welding auxiliary joining part is created, c. positioning of the first component with welding auxiliary j oining part and welding head on the at least one second component so that the welding head abuts at the at least one second component, and d. welding the welding head of the welding auxiliary joining part to the at least one second component so that the at least one first component and the at least one second component are connected to each other by the welding auxiliary j oining part.

15 . The setting-welding method according to claim 14 , wherein the at least one first component and the at least one second component are welded by resistance stud welding or resistance spot welding.

16 . The setting-welding method according to claim 14 , wherein the welding auxiliary joining part is a stud having a head or at least a tip portion, in which a head diameter is larger than a maximum thickness of the tip portion and wherein the stud abuts with a head underside facing the at least one first component after completion of the connection method, or is spaced therefrom.

17 . The setting-welding method according to claim 14 , wherein the welding auxiliary joining part is a stud having a head, in which a head diameter does not exceed a maximum thickness of the tip portion, and wherein the stud with the head is flush with the at least one first component or protrudes therefrom after completion of the connection method.

18 . The setting-welding method according to claim 16 , wherein the head of the welding auxiliary joining part has a circular groove at a side facing the tip portion for receiving a material deformation of a component adjacent to the head.

19 . The setting-welding-method according to claim 16 , wherein the tip portion has an ogival tip having an ogivality factor in the range of 1 to 10 or a conical, a round, a parabolic or a pyram

Assignees

• Boellhoff Verbindungstechnik Gmbh

Inventors

• Draht Torsten
• Hartwig-Biglau Sergej

Classifications

• B21J15/025

  Setting self-piercing rivets · CPC title

• B21J15/08

  Riveting by applying heat {, e.g.} to the end parts of the rivets to enable heads to be formed {(B21J15/027 takes precedence)} · CPC title

• B23K11/11

  Spot welding · CPC title

• B23K2103/16

  Composite materials · CPC title

• B23K11/20 Primary

  of different metals · CPC title