Quantcast

Apparatus and method for brazing

Imported: 24 Feb '17 | Published: 24 Aug '04

Howard Brockman, Christopher Britton

USPTO - Utility Patents

Abstract

The present invention is directed to an apparatus and a method for brazing work pieces together and which eliminates the disadvantages associated with conventional apparatus currently in use for brazing parts together. In a preferred embodiment of the invention, the brazing apparatus comprises an electric connector for connecting to an electrical power source; at least two electrodes adapted for attaching to and providing electrical contact with the work pieces to be brazed together; means for converting the electric power being directed from the electrical power source into a low voltage, high current electric flow directed to the work pieces; and a control system for controlling the brazing operation. The brazing apparatus further comprises means for automatically controlling the time duration of the brazing operation and means for monitoring and automatically controlling the brazing temperature being generated along the interface between the work pieces.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a pair of work pieces to be joined together by the brazing apparatus of the present invention;

FIG. 2 is a block circuit diagram of a preferred embodiment of the brazing apparatus of the present invention showing the power source, at least two electrodes; the transformer for converting electric power from the power source into a low voltage, high current electric flow; and a control system for controlling the brazing operation;

FIG. 3 is a schematic diagram illustrating a pair of electrodes of the present invention electrically connected to a pair of work pieces and having a fluid cooling system;

FIG. 4 is a top perspective view of an electrode of the present invention;

FIG. 5 is a side elevation view of the electrode of FIG. 4;

FIG. 6 is a top view of the electrode of FIG. 4; and

FIG. 7 is another view of the electrode of the present invention showing a cooling fin.

Claims

1. A brazing apparatus for brazing together at least two work pieces comprising:

2. The brazing apparatus of claim 1 further comprising means for permitting the user to manually control the time duration of the brazing operation.

3. The brazing apparatus of claim 1 further comprising means for permitting the user to manually control the brazing temperature being generated along the interface between the work pieces.

4. The brazing apparatus of claim 1 wherein said control system comprises a microprocessor for controlling the brazing operation.

5. The brazing apparatus of claim 1 further comprising means for cooling the electrodes.

6. The brazing apparatus of claim 1 wherein said electrodes are water cooled electrodes.

7. The brazing apparatus of claim 1 further comprises a plurality of electrodes for positioning along the work pieces to provide a uniformed brazing temperature along the interface between the work pieces.

8. A brazing apparatus for brazing together work pieces whereby a fusible material is positioned along the interface between at least two work pieces, the brazing apparatus comprising:

9. The brazing apparatus of claim 8 further comprises means for adjusting the current level of the electric flow when the temperature along the interface between the work pieces exceeds a predefined level.

10. The brazing apparatus of claim 8 further comprising means for permitting the user to manually control the time duration of the brazing operation.

11. The brazing apparatus of claim 8 further comprising means for permitting the user to manually control the brazing temperature being generated along the interface between the work pieces.

12. The brazing apparatus of claim 8 further comprising means for cooling the electrodes.

13. The brazing apparatus of claim 8 wherein said electrodes are water cooled electrodes.

14. The brazing apparatus of claim 8 wherein each said electrode includes a flow channel for receiving cooling fluid effective for minimizing heat buildup in the electrode.

15. The brazing apparatus of claim 14 wherein the brazing apparatus further comprises means for increasing or decreasing the supply of cooling fluid to each electrode.

16. The brazing apparatus of claim 8 further comprises a plurality of electrodes for positioning along the work pieces to provide a uniformed brazing temperature along the interface between the work pieces.

17. A method for brazing at least two work pieces together comprising the steps of:

18. The method for brazing of claim 17 further comprising the step of terminating the brazing operation after a predefined time.

19. The method of brazing of claim 17 further comprising the step of applying a plurality of electrodes at various points along the work pieces and regulating the electric current flow to each electrode to provide the defined temperature level along the interface between the work pieces.

20. The method of brazing of claim 17 further comprising the step of cooling the electrodes.