Welding assembly

• US 5,556,562 A
• Filed: 12/12/1994
• Issued: 09/17/1996
• Est. Priority Date: 12/12/1994
• Status: Expired due to Fees

• Current Assignee: J.W. Harris Co., Inc (Lincoln Electric Holdings Incorporated)
• Original Assignee: J.W. Harris Co., Inc (Lincoln Electric Holdings Incorporated)
• Inventors: Sorenson, John C.
• Primary Examiner(s): Shaw, Clifford C.
• Application Number:
  US08/354,416
• Time in Patent Office: 645 Days
• Field of Search: 219/137.61, 219/136
• US Class Current: 219/137.61
• CPC Class Codes: B23K 9/295 using consumable electrode-wire

Abstract

An improved welding assembly for metal inert gas welding wherein the welding assembly includes a continuous filler metal wire electrode, which is electrically charged and passed through a contact tip generally of a cylindrical shape with a central aperture or tunnel therethrough while the work piece is oppositely charged. The improvement is in the composition of the contact tip in that the tip is made of copper and carbon.

Claims

1. An improved welding assembly wherein the welding assembly includes a continuous metal wire electrode which is charged and passed through a contact tip while a work piece is oppositely charged, the improvement comprising the contact tip being made of an alloy of 99% to 50% copper and 1% to 50% carbon, the copper component providing high electrical conductivity throughout the contact tip and the carbon component providing increased lubricity throughout the contact tip.

2. The improved assembly of claim 1, wherein the improvement comprises the contact tip being made of 98% to 60% copper and 2% to 40% carbon.

3. The improved assembly of claim 1, wherein the improvement comprises the contact tip being made of 97% to 70% copper and 3% to 30% carbon.

4. The improved assembly of claim 1, wherein the improvement comprises the contact tip being of 96% to 80% copper and 4% to 20% carbon.

5. The improved assembly of claim 1, wherein the improvement comprises the contact tip being made of 95% to 85% copper and 5% to 15% carbon.

6. The improved assembly of claim 1, wherein the improvement comprises the contact tip being made of 94% to 85% copper and 6% to 15% carbon.

7. The improved assembly of claim 1, wherein the improvement comprises the contact tip being made of 93% to 85% copper and 7% to 15% carbon.

8. The improved assembly of claim 1, wherein the improvement comprises the contact tip being made of 92% to 85% copper and 8% to 15% carbon.

9. The improved assembly of claim 1, wherein the improvement comprises the contact tip being made of 91% to 85% copper and 9% to 15% carbon.

10. The improved assembly of claim 1, wherein the improvement comprises the contact tip being made of 90% to 85% copper and 10% to 15% carbon.

11. The improved assembly of claim 1, wherein the improvement comprises the contact tip being made of 91% copper and 9% carbon.

12. The improved assembly of claim 1, wherein the contact tip is generally of a cylindrical shape with a central aperture therethrough.

13. The improved assembly of claim 1, wherein the contact tip is manufactured from a processes group comprised of molding and machining.

14. An improved welding assembly for metal inert gas welding wherein the welding assembly includes a continuous metal wire electrode which is charged and passes through a contact tip generally of a cylindrical shape with a central aperture therethrough while a work piece is oppositely charged, the improvement comprising the contact tip being made of an alloy of copper and carbon, the copper component providing high electrical conductivity throughout the contact tip and the carbon component providing increased lubricity throughout the contact tip.

15. The improved welding assembly of claim 14, wherein the improvement comprises the contact tip being of 99% to 50% copper and 1% to 50% carbon.

16. The improved assembly of claim 14, wherein the improvement comprises the contact tip being made of 98% to 60% copper and 2% to 40% carbon.

17. The improved assembly of claim 14, wherein the improvement comprises the contact tip being made of 97% to 70% copper and 3% to 30% carbon.

18. The improved assembly of claim 14, wherein the improvement comprises the contact tip being of 96% to 80% copper and 4% to 20% carbon.

19. The improved assembly of claim 14, wherein the improvement comprises the contact tip being made of 95% to 85% copper and 5% to 15% carbon.

20. The improved assembly of claim 14, wherein the improvement comprises the contact tip being made of 94% to 85% copper and 6% to 15% carbon.

21. The improved assembly of claim 14, wherein the improvement comprises the contact tip being made of 93% to 85% copper and 7% to 15% carbon.

22. The improved assembly of claim 14, wherein the improvement comprises the contact tip being made of 92% to 85% copper and 8% to 15% carbon.

23. The improved assembly of claim 14, wherein the improvement comprises the contact tip being made of 91% to 85% copper and 9% to 15% carbon.

24. The improved assembly of claim 14, wherein the improvement comprises the contact tip being made of 90% to 85% copper and 10% to 15% carbon.

25. The improved assembly of claim 14, wherein the improvement comprises the contact tip being made of 91% copper and 9% carbon.

26. The improved assembly of claim 14, wherein the contact tip is generally of a cylindrical shape with a central aperture therethrough.

27. The improved assembly of claim 14, wherein the contact tip is manufactured from a processes group comprised of molding and machining.