Connection of Fill Tube to a Two-Phase Heat Dissipation Device

Abstract

This invention discloses a cold-work method to connect the metal wall of a two-phase heat dissipation device with a fill tube. First, place the fill tube into a hole prepared in the wall, then push a squeezer slightly larger than the inner diameter of the fill tube to create permanent deformation and hence hermetical bonding thereof. Finally, draw out the squeezer to finish the cold work. This method simplifies the procedure and equipment by avoiding a relatively high-temperature soldering or brazing process.

1 . A method to hermetically connect a fill tube to the metal container wall of a two-phase heat dissipation device, comprises the steps of: 
 (1) placing a front section of said fill tube into a hole prepared in said container wall;    (2) forcing a squeezer with diameter somewhat larger than the inner diameter of said front section of said fill tube into said front section of said fill tube, to cause permanent plastic deformation of said fill tube; and    (3) drawing out said squeezer.    
   
   
       2 . A method as describe in  claim 1 , wherein said squeezer is a cylindrical object.  
   
   
       3 . The method as describe in  claim 1 , wherein said squeezer is a screw-type cylindrical object.  
   
   
       4 . The method as describe in  claim 1 , wherein an interfacial material is added between the connecting surfaces of said fill tube and said container wall.  
   
   
       5 . The method as describe in  claim 4 , wherein said interfacial material is a deformable metal.  
   
   
       6 . The method as describe in  claim 4 , wherein said interfacial material is a deformable non-metal.  
   
   
       7 . The method as describe in  claim 4 , wherein said interfacial material is a binding agent.