| 摘要 |
PURPOSE:To obtain the production method of an oscillation joint ring capable of simply and reliably producing a small diameter oscillation joint ring excellent in strength in mass production. CONSTITUTION:An inner metal tube 18 and a core 16, which press the inner metal tube 18 into the inner peripheral face of outer metal tube 16, are inserted in an outer metal tube 15. By irradiating from the outer peripheral face 15a of outer metal tube 15 with laser beam, laser beam welding is executed. By this method, the outer metal tube 15 and inner metal tube 18 are joined. After the core 16 is pulled out from the outer metal tube 15, the outer metal tube 15 on the inner peripheral face 15b of which the inner metal tube is joined is cut to a sliced ring. |
