Method of manufacturing a resistance welding electrode

Abstract

The invention relates to a method of manufacturing a resistance welding electrode for welding aluminum or aluminum alloys at the amperage range of 8 to 14 kA. In the assembly for the resistance welding electrode having a combination of a copper or a copper alloy material as a matrix and a stainless steel material positioned in the interior of the matrix the areas made of the stainless steel are positioned parallel to each other in the direction of the electric current flowing through the electrode and have an essential equal distance between two adjacent areas of the stainless steel. The areas are bonded together by hot extrusion and the resistance welding electrode is achieved by cutting the hot extruded product into an appropriate length.

1 . Method of manufacturing a resistance welding electrode for welding aluminum or aluminum alloys at the amperage range of 8 to 14 kA wherein the assembly for the resistance welding electrode, having a combination of a copper or a copper alloy material as a matrix and a stainless steel material positioned in the interior of the matrix so that the areas made of the stainless steel are positioned parallel to each other in the direction of the electric current flowing through the electrode and have an essential equal distance between two adjacent areas of the stainless steel, is bonded together by hot extrusion and the resistance welding electrode is achieved by cutting the hot extruded product into an appropriate length.  
     
     
         2 . Method of the  claim 1 , wherein the copper or copper alloy material for the assembly is in the form of discs layered or stacked one above another having holes for the stainless steel material.  
     
     
         3 . Method of the  claim 2 , wherein the discs are compacted from a non-ferrous powder metal.  
     
     
         4 . Method of the  claim 1 , wherein the copper or copper alloy material for the assembly is cast into a mold having the preinstalled stainless steel material.  
     
     
         5 . Method of the  claim 1 , wherein the stainless steel material for the assembly is cast into holes in the matrix material.  
     
     
         6 . Method of the  claim 1 , wherein the stainless steel material for the assembly is in the form of a rod.  
     
     
         7 . Method of the  claim 1 , wherein the stainless steel material for the assembly is in the form of a tube.  
     
     
         8 . Method of the  claim 1 , wherein the stainless steel material for the assembly is electroplated.  
     
     
         9 . Method of the  claim 1 , wherein the stainless steel material for the assembly is coated.  
     
     
         10 . Method of the  claim 1 , wherein the assembly for the resistance welding electrode is hot extruded in the temperature range of 700-800° C.