Welding torch

Patent metadata

Field	Value
Publication number	US-9278405-B2
Application number	US-201214123674-A
Country	US
Kind code	B2
Filing date	Jun 18, 2012
Priority date	Jun 22, 2011
Publication date	Mar 8, 2016
Grant date	Mar 8, 2016

Abstract

In a multi-electrode welding torch, electrodes ( 2 ) are configured into a shape that has an arc-shaped curved surface area (R) in at least a portion of a cross-section thereof that is orthogonal to the longitudinal direction thereof. Collets ( 4 ) are each provided with a groove portion ( 4 a ) in which an electrode ( 2 ) is fitted, and whose inner wall surfaces ( 4 b ) come into contact in a plurality of locations with the curved surface area (R) when viewed in the longitudinal direction of the electrode ( 2 ).

First claim

The invention claimed is:

1. A welding torch comprising:
a plurality of electrodes that are insulated from the welding torch by an insulating material; and
collets that are in contact with the electrodes and conduct power to the electrodes, wherein
the electrodes are shaped such that they have an arc-shaped curved surface area in at least a portion of a cross-sectional shape thereof that is orthogonal to the longitudinal direction thereof,
each collet is provided with a groove portion in which the electrode is fitted, and whose inner wall surface is in contact with a plurality of locations of the curved surface area of the electrode along a cross-section thereof that is orthogonal to the longitudinal direction of the electrode, and
there are provided projecting portions that protrude from inner wall surfaces of the groove portion, and engagement holes that are provided in the electrode and with which the projecting portions engage.

2. The welding torch according to claim 1 , wherein a notch portion is provided in a distal end of the collet that faces towards a distal end side of the electrode.

3. The welding torch according to claim 2 , wherein a notch portion is provided in a portion of the distal end of the collet that does not come into contact with the electrode.

4. The welding torch according to claim 1 , wherein
there is provided a collet supporting component that is disposed such that its position is fixed relative to the electrode, and
the collet is supported by the collet supporting component such that the collet is able to be tilted relative to the electrode.

5. The welding torch according to claim 1 , wherein the collet is supported by the collet supporting component such that the collet can be displaced in a direction that is orthogonal to the longitudinal direction of the electrode.

6. The welding torch according to claim 1 , wherein the shape of the groove portion when viewed in the longitudinal direction of the electrode is a trapezoidal shape.

Assignees

• Nishimura Yoshihito
• Kobayashi Kazuyuki
• Iijima Tooru
• Masumoto Kazuo
• Ihi Corp

Inventors

• Nishimura Yoshihito
• Kobayashi Kazuyuki
• Iijima Tooru
• Masumoto Kazuo

Classifications

• B23K35/0261

  Rods, electrodes or wires · CPC title

• B23K35/0277

  of non-circular cross-section · CPC title

• B23K35/0255

  for use in welding (B23K35/0205 takes precedence) · CPC title

• B23K9/1675

  making use of several electrodes · CPC title

• B23K9/296 Primary

  using non-consumable electrodes · CPC title