| 摘要 |
PURPOSE:To preform pressure welding of a thin container with extremely high pressure welding force by filling a container for a heat pipe with working liquid for pipe swaging when swaging and pressure-welding a hollow pipe where the container for a heat pipe is inserted. CONSTITUTION:A container 2 completed as a heat pipe by being flushed by a high-temperature heat treatment under a high vacuum is made free of noncondensed gas generation, and then filled with working liquid 6 through an injection thin pipe 3 welded to a thick sealing plate 5. After the terminal of the pipe 3 is sealed, the container 2 is inserted into a hollow pipe 1 to be inserted. In this case, the internal wall of the pipe and the container 2 have an enough gap for the insertion. In this state, the pipe 1 is swaged from one terminal through a swaging die 7, and consequently impulsive high static hydraulic pressure is generated in the liquid 6 to expand the pipe over the entire internal surface of the container as shown by arrows. After pressure welding, an opening is formed in the pipe 3 and the vacuum degree state, etc., is adjusted to desired heat pipe conditions. |
