Directing apparatus for orienting an arc of an arc welding device for arc welding using a magnetically moved arc, and use of the directing apparatus

Patent metadata

Field	Value
Publication number	US-12533742-B2
Application number	US-202017756001-A
Country	US
Kind code	B2
Filing date	Nov 9, 2020
Priority date	Nov 13, 2019
Publication date	Jan 27, 2026
Grant date	Jan 27, 2026

Abstract

A directing apparatus for orienting an arc of an arc welding device for arc welding, in particular for TIG welding, using a magnetically moved arc, comprising: a retaining device having an opening for receiving a welding head of the arc welding device; one or more solenoid coils for forming a magnetic field for deflecting an arc generated by a welding device in the opening; and at least two bent pole shoes comprising at least two legs for focusing the magnetic field, a first of the legs of each pole shoe being affixed to the retaining device and/or to the solenoid coil and a second of the legs being oriented at an angle of less than 130° to the first leg.

First claim

The invention claimed is:

1 . A directing apparatus for orienting an arc of an arc welding device configured for arc welding using a magnetically moved arc, the directing apparatus comprising:
a retaining device including an opening adapted to receive a welding head of the arc welding device; a solenoid coil configured to generate a magnetic field as to deflect an arc generated by the arc welding device in the opening of the retaining device; and at least two bent pole shoes comprising at least two legs configured to focus the magnetic field, wherein a first leg of each pole shoe is affixed to the retaining device and/or to the solenoid coil and a second leg of each pole shoe is oriented at an angle of less than 130° relative to the first leg.

2 . The directing apparatus of claim 1 , wherein the second legs of the at least two pole shoes are angled toward each other.

3 . The directing apparatus of claim 1 , wherein the directing apparatus comprises at least four bent pole shoes, wherein the second legs of each pole shoe are oriented to one another such that each pole shoe is spaced apart from an adjacent pole shoe by less than 3 mm.

4 . The directing apparatus of claim 1 , wherein each pole shoe has a uniform width along a longitudinal extension thereof.

5 . The directing apparatus of claim 1 , wherein each pole shoe has a thickness of at least 5 mm.

6 . The directing apparatus of claim 1 , wherein each pole shoe is made of steel.

7 . The directing apparatus of claim 6 , wherein each pole shoe is made of steel with material number 1.0122 and/or 1.0038.

8 . The directing apparatus of claim 1 , wherein the solenoid coil comprises a coil former, around which a wire is wound, and a coil core disposed inside the coil former.

9 . The directing apparatus of claim 8 , wherein the wound wire includes at least 450 turns of the wire.

10 . The directing apparatus of claim 1 , wherein the retaining device is tubular and includes an annular disk disposed at each end thereof, wherein a first of the annular disks is a magnetizable annular disk and a second of the annular disks is a non-magnetizable annular disk, wherein at least the non-magnetizable annular disk includes recesses configured to receive and hold the at least two pole shoes in an at least partially form-fitting manner.

11 . The directing apparatus of claim 1 , wherein the second leg of each pole shoe is oriented at an angle of 120° relative to the first leg.

12 . The directing apparatus of claim 1 , wherein the second leg of each pole shoe is oriented at an angle between 115° and 125° relative to the first leg.

13 . A method of pressure welding using a magnetically moved arc, the method comprising:
providing an arc welding device comprising the directing apparatus according to claim 11 ; and welding a workpiece using the arc welding device, wherein the magnetic field for deflection of the arc generated by the directing apparatus at an operating current of 1 A is at least 125 G in areas.

14 . The method of claim 13 , wherein the magnetic field is between 155 and 200 G in areas.

15 . The method of claim 13 , wherein the magnetic field is at least 150 G in areas.

16 . The method of claim 13 , wherein the directing apparatus comprises at least a second solenoid coil, and the arc welding device includes a control unit connected to each solenoid coil and configured such that each solenoid coil is individually actuated.

Assignees

• Flowtec Ag

Inventors

• Bosse Lüder
• Mariager Simon
• Ober Pierre-Jean
• Wohlgemuth Werner

Classifications

• B23K9/167

  and of a non-consumable electrode · CPC title

• B23K9/08 Primary

  Arrangements or circuits for magnetic control of the arc · CPC title

• B23K9/0737

  Stabilising of the arc position · CPC title