JOINING METHOD FOR TUBE AND TUBE PLATE

摘要

PURPOSE:To join tubes and a tube plate surely by disposing a solder foil provided with insertion holes and openings around said holes on the outside circumferences of tubes inserted into the tube holes of a tube plate and projecting therefrom and heating the same from the outside thereby heating the tube plate simultaneously with the heat passed through the openings of the solder foil. CONSTITUTION:Many tubes 7 are inserted into the tube holes 6 of a tube plate 5 by projecting the top ends thereof from the tube plate. A solder foil 11 provided with many insertion holes 9 and openings 10 around the holes 9 is prepared and the holes 9 of the foil 11 are inserted and fixed onto the outside circumferences of the tubes 7 projecting on the plate 5. A flux is coated on the surface of the foil 11 and the foil is heated from the outside of the plate 5. Then the flux passes through the openings 10 of the foil 11 and enters the spacings between the foil 11 and the plate 5. The heat thereof heats the foil 11 and also heats the plate 5 as well by passing through the openings 10. The foil 11 melts and enters the spacings between the holes 6 of the plate 5 and the tubes 7, thereby sticking both.