IT1111215B - Welding metals of high thermal and electrical conductivity - using electrode having negative temp. coefft. - Google Patents
Welding metals of high thermal and electrical conductivity - using electrode having negative temp. coefft.Info
- Publication number
- IT1111215B IT1111215B IT2120079A IT2120079A IT1111215B IT 1111215 B IT1111215 B IT 1111215B IT 2120079 A IT2120079 A IT 2120079A IT 2120079 A IT2120079 A IT 2120079A IT 1111215 B IT1111215 B IT 1111215B
- Authority
- IT
- Italy
- Prior art keywords
- electrodes
- pieces
- high thermal
- electrical conductivity
- coefft
- Prior art date
Links
- 239000002184 metal Substances 0.000 title abstract 2
- 229910052751 metal Inorganic materials 0.000 title abstract 2
- 238000003466 welding Methods 0.000 title abstract 2
- 150000002739 metals Chemical class 0.000 title 1
- 238000005219 brazing Methods 0.000 abstract 2
- 229910052802 copper Inorganic materials 0.000 abstract 1
- 230000007423 decrease Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 239000000155 melt Substances 0.000 abstract 1
- 238000005057 refrigeration Methods 0.000 abstract 1
Landscapes
- Arc Welding In General (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
Metal pieces of high thermal and electrical conductivity are welded together using electrodes whose electrical resistance decreases as the temp. increases. The electrodes are resiliently pressed on to the pieces. The electrodes are heated by the Joule effect and the heat generated is transferred by conduction to the pieces. Used for joining together of Cu and Al tubes, e.g. as elements of a refrigeration circuit. Excellent weld quality is achieved using low cost, simple operation. The heat transmitted by the electrodes either melts the welding material or transforms the pieces to be welded into their plastic state. The electrodes may be movable towards the pieces to apply pressure during the joining operation. Brazing, other than torch brazing, can be used.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT2120079A IT1111215B (en) | 1979-03-22 | 1979-03-22 | Welding metals of high thermal and electrical conductivity - using electrode having negative temp. coefft. |
| EP79200251A EP0005880A1 (en) | 1978-05-25 | 1979-05-22 | Method of and apparatus for sealing tubes constructed of metals of high thermal and electrical conductivity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT2120079A IT1111215B (en) | 1979-03-22 | 1979-03-22 | Welding metals of high thermal and electrical conductivity - using electrode having negative temp. coefft. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IT7921200A0 IT7921200A0 (en) | 1979-03-22 |
| IT1111215B true IT1111215B (en) | 1986-01-13 |
Family
ID=11178271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT2120079A IT1111215B (en) | 1978-05-25 | 1979-03-22 | Welding metals of high thermal and electrical conductivity - using electrode having negative temp. coefft. |
Country Status (1)
| Country | Link |
|---|---|
| IT (1) | IT1111215B (en) |
-
1979
- 1979-03-22 IT IT2120079A patent/IT1111215B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| IT7921200A0 (en) | 1979-03-22 |
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