| 摘要 |
PURPOSE:To enable the friction pressure welding of a thin fine tube without causing any deformation on the joining part by performing a friction pressure welding by forming annular projection at the tip of the pipe for pressure welding in case of joining the thin fine diameter tube of Cu, Al, etc. with friction pressure welding. CONSTITUTION:Both pipe 11' and 12' are subjected to a friction pressure welding with advancing a fixed jig 4 by rubbing the fine tube 11' fitted to a threeway chuck 3 with an annular projecting part by turning it at high speed for the fine tube 12' fitted to a fixed jig 4 by forming the annular projection 2 at the tip of the fine tube 11', 12' to be joined, in case of joining with friction pressure welding the thin fine tube of less strength of Cu, Al, etc. A sufficient pressure welding sectional area is obtd. by the annular projection 2 and the deformation of the pipe in pressing can be prevented by the work hardening, and the thin fine tube of Cu, Al, etc., is joined with friction without deforming at its joining part.
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