Method and devices for connecting an aluminum strip to a copper strip under protective gas

Abstract

The invention relates to a method for a firm metallurgic connection of an aluminum band with a copper band through which the two bands that are moved relative to one another in their longitudinal direction are continuously cleaned from oxides in a cleaning device under protective gas at their contact surfaces and are subsequently provided to a compression device in which the bands are pressed together with their clean surfaces and connected with another to form a one-piece band including the steps: running both bands ( 8, 9 ) continuously under protective gas up to and into the compression device ( 4 ) by configuring the cleaning device ( 3 ) and the compression device ( 4 ) as a unit in a housing ( 7 ) enclosing a contiguous space, and pulling the two bands ( 8, 9 ) or the one piece band ( 11 ) through the cleaning device ( 3 ) and the compression device ( 4 ) by a pull off device ( 5 ) arranged behind (downstream) the compression device ( 4 ).

1 . A method for a metallurgically firm connection of an aluminum band with a copper band through which the two bands that are moved relative to one another in their longitudinal direction are continuously cleaned from oxides in a cleaning device under protective gas at their contact surfaces and are subsequently provided to a compression device in which the bands are pressed together with their clean contact surfaces and connected with another to form a one-piece band comprising the steps of:
 running both bands continuously under protective gas up to and into the compression device by configuring the cleaning device and the compression device as a unit in a housing enclosing a contiguous space, and   pulling the two bands or the one piece band through the cleaning device and the compression device through a pull off device arranged downstream of the compression device.   
     
     
         2 . The method according to  claim 1 , wherein the bands are used with substantially identical widths. 
     
     
         3 . A device for performing the method according to  claim 1 , wherein two rollers are rotatably arranged in the compression device which are separated from one another by a gap whose dimensions are variable, wherein the bands are pulled through the gap. 
     
     
         4 . The device for performing the method according to  claim 1 , wherein the compression device is configured as a slotted nozzle with a variable slot. 
     
     
         5 . A device for performing a metallurgically firm connection of an aluminum band with a copper band, comprising:
 a pull off device configured to move the two bands relative to one another in their longitudinal direction,   a cleaning device for continuously cleaning oxides from the two bands under protective gas at their contact surfaces, and   a compression device in which the two bands are pressed together with their clean contact surfaces and connected with each other to form a one-piece band, wherein the cleaning device and compression device are configured to   run both bands continuously under protective gas up to and into the compression device by configuring the cleaning device and the compression device in a unit in a housing enclosing a contiguous space, and   -wherein the pull off device pulls the two bands or the one piece band through the cleaning device and the compression device, the pull off device arranged downstream of the compression device.   
     
     
         6 . The device for performing the method according to  claim 5 , wherein the compression device is configured as a slotted nozzle with a variable slot.