| 摘要 |
PROBLEM TO BE SOLVED: To provide a metal member joining method capable of reducing the work for removing burrs after the joining, and a metal member joined by the joining method. SOLUTION: In the joining method, a metal bar 10 is press-inserted in a circular hole formed in a metal piece 20 while the metal bar is relatively rotated, and the metal piece 20 and the metal bar 10 are joined by the friction pressure welding. A plurality of projection parts 11 are provided in a joining area to the circular hole in the metal bar 10, along the axial direction of the metal bar 10. Each projection part 11 has a surface 12 orthogonal to the axial direction of the metal bar 10, and an inclined surface to be tapered from the front side to the rear side of the advancing direction to the circular hole in the metal bar 10. Each projection part is an annular body continuous along the circumferential direction of the metal bar 10. An excessive constitution material of the metal piece 20 formed in a joined part is joined while being pressed in the advancing direction of the metal bar 10 by the orthogonal surface 12 of the projection part 11, and generation of burrs 250 is suppressed thereby. COPYRIGHT: (C)2011,JPO&INPIT
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