| 摘要 |
PURPOSE:To obtain the good sealed part by a method, in which the diameter size of the hole part of a ring sealing body as compared with the outer diameter of a metal tube is enlarged in the specific range while being arranged so that a part of the peripheral face of the ring sealing body hole part may closely contact with the outer peripheral face of the metal tube followed by heat treatment. CONSTITUTION:A ring-formed sealing material 16 is fitted in a metal tube 5 by means of the hole part 16a with the diameter D provided in the center of said sealing material while being placed on a blocking body 2 so that a part of the peripheral face of the hole part 16a may closely contact with the outer peripheral face of the metal tube 5. The relation of the outer diameter (d) of the metal tube 5 to the diameter D of the hole part 16a of the sealing material 16 is :0.8D>=d. Thereby, even when the ring sealing material 16 is thermally contracted at the time of heating, the sealing material 16a is executed from being broken and scattered while being resulted from the metal tube 5 as before, the molten sealing material is collected to the peripheral surface of the metal tube 5 while being uniformly permeated and filled along said outer peripheral surface into the gap between the metal tube 5 and the through hole 2a of the blocking body 2. |
