Assembly of electrode body and electrode carrier for a plasma torch

• US 6,147,318 A
• Filed: 11/18/1999
• Issued: 11/14/2000
• Est. Priority Date: 12/12/1997
• Status: Expired due to Fees

• Current Assignee: La Soudure Autogene Francaise (Lincoln Electric Holdings Incorporated)
• Original Assignee: La Soudure Autogene Francaise (Lincoln Electric Holdings Incorporated)
• Inventors: Marhic, Gerard
• Primary Examiner(s): PASCHALL, MARK H
• Application Number:
  US09/443,116
• Time in Patent Office: 362 Days
• Field of Search: 219/121.52, 219/121.5, 219/121.48, 219/121.51, 219/121.39, 219/74, 219/75, 313/231.31, 313/231.41
• US Class Current: 219/121.52
• CPC Class Codes: H05H 1/34 Details, e.g. electrodes, nozzles
• CPC Class Codes: H05H 1/3442 Cathodes with inserted tip
• CPC Class Codes: H05H 1/3478 Geometrical details
• CPC Class Codes: H05H 1/38 Guiding or centering of electrodes

Abstract

Male/female assembly (11) for a plasma torch comprising an electrode body (3) and an electrode carrier (4), in which:

the electrode body (3) comprises at least one tapping (15) within which is provided at least one recess (8) extending over all the lengths (d) of said tapping (15), and at least one downstream portion defining a recess (16) located between the upstream tapped portion and the bottom of the electrode body (3), and

the electrode carrier (4) comprises, on its external peripheral surface, at least one gauge (4") having at least locally a profile corresponding to the profile of said at least one recess (8) of the electrode body (3) and at least one screw thread (15'"'"'), said gauge (4") being located between the downstream end of the electrode carrier (4) and said screw thread (15).

Claims

1. Male/female assembly (11) for a plasma torch comprising an electrode body (3) having substantially the shape of a sleeve forming the female portion and an electrode carrier (4) of substantially elongated shape forming the male portion, in which:

the electrode body (3) comprises, over an upstream portion of its internal periphery, at least one tapping (15) within which is provided at least one recess (8) extending over all the length (d) of said tapping (15), the tapped portion (15) having, in transverse cross-section, a diameter D1, and at least one downstream portion defining a recess (16) of a diameter D2 located between the tapped upstream portion (15) and the bottom of the electrode body (3), wherein D2>

D1, and

the electrode carrier (4) comprises, over its external peripheral surface, at least one gauge (4") having at least locally a transverse cross-sectional profile corresponding to the profile of said at least one recess (8) of the electrode body (3) and at least one screw thread (15'"'"'), said gauge (4") being located between the downstream end of the electrode carrier (4) and said screw thread (15'"'"').

2. Male/female assembly according to claim 1, characterized in that the electrode body (3) comprises several recesses (8).

3. Male/female assembly according to claim 1, characterized in that the recesses (8) of said electrode body (3) form, in transverse cross-section, a polygon.

4. Male/female assembly according to claim 3, characterized in that the recesses (8) form a polygon selected from a triangle, a square, a pentagon, a hexagon, a heptagon and an octagon.

5. Male/female assembly according to claims 1, characterized in that the bottom of the electrode body (3) moreover comprises an electrode (2).

6. Electrode body (3), characterized in that it is adapted to constitute the female portion of a male/female assembly (11) according to claim 1.

7. Electrode carrier (4), characterized in that it is adapted to constitute the male portion of a male/female assembly (11) according to claim 1.

8. A plasma torch, characterized in that it is provided with a male/female assembly (11) according to claim 1, with an electrode body (3) and/or an electrode carrier (4).

9. A process for welding, cutting or marking with a plasma arc, characterized in that it uses a plasma torch according to claim 8.

10. Automatic machine for welding, cutting or marking with a plasma arc, characterized in that it is provided With a male/female assembly (11) according to claim 1, with an electrode body (3) and/or with an electrode carrier according to claim 7.