| 摘要 |
PURPOSE:To remove very small marks in the inner face of a tube and to make it into perfect mirror state, by introducing an oxyhydrogen flame into a rotating quartz type jacket tube, transferring it in the longer direction, applying directly heat and flame pressure to the inner face of the tube. CONSTITUTION:First, the quartz tube 1 is fixed to the rotary chucks 5 and 5', and the oxyhydrogen burner 2 is fixed to the movable chuck 6 positioned on the central axis of the quartz tube 1. The quartz tube 1 is rotated at a constant speed by the rotary chucks 5 and 5', oxygen gas and hydrogen gas are fed to the oxyhydrogen burner 2, the oxyhydrogen flame 3 is formed at the nozzle 4, it is introduced into the quartz tube 7 by the movable chuck 6, and reciprocated in the longer direction at a constant speed. The oxyhydrogen burner 2 is made not to be brought into contact with the inner face of the quartz tube 7, and the jet direction of the gas at the nozzle 4 is made not to be parallel with the central axis of the burner 2. By this structure, given heat and flame pressure are applied to the inner face of the quartz tube 1. |
