| 摘要 |
PURPOSE:To form easily a brazed part having high strength in the stage of brazing and welding a pair of parts consisting of thin plate materials at the flange part by making the lower flange longer than the upper flange and supplying molten solder to the exposed part of the lower flange. CONSTITUTION:Cylindrical semi-products M1-M3 for forming a muffler, etc. for a motor cycle are manufactured by brazing and welding respectively an outside plate 6 and an inside plate 7 in joint parts 8, 9 in the stage of manufacturing said muffler of thin plate materials. The part 9 on the lower side is exposed longer by 5-8mm.l than the part 8 on the upper side from the part 8. A welding torch 11 is disposed above the exposed part 10 of the joint part 9 and a wire electrode 12 of a brazing material consisting of a Cu-Si alloy, etc. having a relatively high melting temp. is used. The electrode 12 is melted while inert gas is ejected from the torch 11. The molten brazing alloy accumulates once on the exposed part 10 then flows into the spacing between the two joint parts 8 and 9 and solidifies therein, thus welding securely the plate 6 and the plate 7. |
