Electrode head of the plasma cutting machine

• US 8,455,786 B2
• Filed: 01/23/2012
• Issued: 06/04/2013
• Est. Priority Date: 01/31/2011
• Status: Expired due to Fees

• Current Assignee: Wen-Yi Fang
• Original Assignee: Wen-Yi Fang
• Inventors: Fang, Wen-Yi
• Primary Examiner(s): PASCHALL, MARK H
• Application Number:
  US13/355,711
• Publication Number:
  US 20120193332A1
• Time in Patent Office: 498 Days
• Field of Search: 219/121.39, 219/121.48, 219/121.52, 219/121.45, 219/121.36, 219/75, 219/119, 313/231.41, 313/231.51
• US Class Current: 219/121.52
• CPC Class Codes: B23K 10/00 Welding or cutting by means of a plasma

Abstract

An electrode head of the plasma cutting machine is provided. The electrode head comprises a sheath, a bearing means, an electrode core, a first brazing means and a second brazing means. The sheath has a first end and a second end. A first flange extends radially inward from the first end. The bearing means has a third end and a fourth end. A second flange extending from the third end is fixed to the first flange of the sheath via the first brazing means. A protrusion portion is provided axially from the interior of the fourth end. A recess portion is extending from the third end into the interior of the protrusion portion. The electrode core is fixed in the recess portion via the second brazing means.

Claims

1. An electrode head of the plasma cutting machine comprising a sheath (1), a bearing means (2), and an electrode core (3), characterized in that:

the electrode head further comprises a first brazing means (4) and a second brazing means (5), wherein the electrode head is assembled by using brazing and the second brazing means (5) consists of copper and silver;

the sheath (1) is hollow inside and comprises a first end (11) and a second end (12), wherein a first flange (13) is provided and extends radially from the first end (11) into the interior of the sheath (1);

the bearing means (2) is rod-shaped and comprises a third end (21) and a fourth end (22), wherein

a second flange (23) is provided to be fixed to the first flange (13) of the sheath (1) via the first brazing means (4), and extends radially outward from the third end (21), and,

a protrusion portion (24) is formed on the fourth end (22) and protrudes toward the interior of the sheath (1),

a recess portion (25) is defined in the axial interior of the protrusion portion (24) with an opening on the third end (21), and

the electrode core (3) is disposed in the recess portion (25) and is fixed to the bearing means (2) via the second brazing means (5), wherein the electrode core (3) is made of hafnium.

2. The electrode head of the plasma cutting machine of claim 1, wherein the second brazing means (5) has a thickness (T2) which ranging from 0.01 mm to 5 mm.

3. The electrode head of the plasma cutting machine of claim 2, wherein the second brazing means (5) is formed in a shape of tube with thin wall.

4. The electrode head of the plasma cutting machine of claim 2, wherein the electrode core (3) is rod-shaped, and the recess portion (25) is defined for disposing the correspondingly rod-shaped electrode core (3).

5. The electrode head of the plasma cutting machine of claim 2, wherein the electrode core (3) is in the shape of cylinder with equal radius, and the recess portion (25) is defined for disposing the corresponding electrode core (3).

6. The electrode head of the plasma cutting machine of claim 2, wherein the protrusion portion (24) forms a cylinder of equal radius, and an annular space (6) is defined between the protrusion portion (24) and the sheath (1).

7. The electrode head of the plasma cutting machine of claim 2, wherein the sheath (1) is made of copper and the bearing means (2) is made of silver.

8. The electrode head of the plasma cutting machine of claim 2, wherein an annular chamfer portion (7) is formed on the exterior surface where the sheath (1) and the first flange (13) connect each other.

9. The electrode head of the plasma cutting machine of claim 1, wherein the second brazing means (5) comprises 20%˜

80% silver.

10. The electrode head of the plasma cutting machine of claim 1, wherein the first brazing means (4) has a thickness (T1) ranging from 0.01 mm to 5 mm.