Claims
- 1. A method of welding lead parts through an aperture in the partition of a battery case utilizing an electrode comprising at least an extruding portion for extruding portions of said parts to touch within said aperture, and a forging portion for forging portions of said parts during the welding of said parts, comprising the steps of:
- a. positioning said parts on opposite sides of said aperture to at least entirely overlap said aperture;
- b. extruding at least a portion of said parts into said aperture at least until said forging portion contacts a surface of said part and said extruded portions touch within said aperture;
- c. limiting the degree of contact between said parts within said aperture responsive to the degree of contact between said forging portion and said lead part;
- d. passing current through said parts to melt said portions of said parts at least within said aperture;
- e. compressing at least said melted portions within said aperture; and
- f. forging unmelted portions of said parts surrounding said aperture at least during a portion of said compression step, whereby said lead parts are welded through said partition of said battery case.
- 2. The invention of claim 1 wherein the performance of step d forms a conical depression in the surface of each of said parts.
- 3. The invention of claim 1 wherein the performance of step e forms an annular depression surrounding said aperture.
- 4. The invention of claim 1 wherein at least a portion of said unmelted portion is sheared during said forging step.
- 5. The invention of claim 1 wherein at least a portion of said unmelted portion is formed generally toward said aperture during said forging process.
- 6. The invention of claim 1 wherein at least a portion of said melted portion is formed generally toward said aperture borders during said compression step.
- 7. The invention of claim 1 wherein the limiting provided by the performance of step c is responsive to the distance between the leading surface of the extruding portion and the leading surface of the forging portion.
- 8. The invention of claim 7 wherein the distance is substantially equal to 1/2 the thickness of the battery partition.
- 9. The invention of claim 7 wherein the limiting provided by the performance of step c occurs substantially irrespective of the thickness of the lead parts.
- 10. The invention of claim 1 wherein the limiting provided by the performance of step c is provided by temporarily stalling movement of the electrodes.
- 11. A method of welding lead parts through an aperture in the partition of a battery case to form a connection therethrough, utilizing an electrode comprising at least an extruding portion for extruding portions of said parts to touch within said aperture, and a forging portion for forging portions of said parts during the welding of said parts, comprising the steps of:
- a. positioning said parts on opposite sides of said aperture to at least entirely overlap said aperture
- b. extruding at least a portion of said parts into said aperture at least until said forging portion contacts a surface of said part and said extruded portions touch within said aperture;
- c. limiting contact between said parts within said aperture responsive to the degree of contact between said forging portion and said lead part;
- d. passing current through said parts to melt said portions of said parts at least within said aperture; and
- e. compressing at least said melted portions within said aperture, thereby filling the aperture;
- whereby said lead parts are welded through said partition of said battery case.
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a continuation-in-part of my prior U.S. patent application Ser. No. 790,881, filed Apr. 26, 1977 now Pat. No. 4,166,210, issued Aug. 28, 1978, entitled "ELECTRODES FOR USE IN THE EXTRUSION-FUSION WELDING OF LEAD PARTS THROUGH AN APERTURE IN A BATTERY CASE AND METHOD OF EXTRUDING, FUSING AND FORGING LEAD CONNECTIONS IN BATTERY CASES" which application is incorporated by reference as if fully set forth herein.
US Referenced Citations (11)
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
790881 |
Apr 1977 |
|