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    • 9. 发明专利
    • Self-piercing rivet fastening device
    • JP3976244B2
    • 2007-09-12
    • JP2002097228
    • 2002-03-29
    • 本田技研工業株式会社
    • 修一郎 岩月
    • B21J15/00B21J15/10B21J15/28F16B5/04F16B19/08
    • B21J15/025B21J15/285B21J15/36
    • PROBLEM TO BE SOLVED: To provide a self-piercing rivet fastening device obtaining sufficient fastening strength regardless of the combination of the material and thickness of a metallic sheet. SOLUTION: The device is equipped with a punch and a die 3 opposing each other. The die 3 is composed of die parts 3a, 3b having a dish-like supporting face 3c for holding a material to be fastened, a base 2 which supports the die parts 3a, 3b freely movably forwards and backwards in the punching direction, a center pin 4 which is fixed on this base 2 and inserted into a through-hole 3d penetrating through the center axis of the die parts 3a, 3b, and springs 6 which press the die parts 3a, 3b in the punching direction by prescribed repulsive force. When pressurizing force on the supporting face 3c becomes larger than the repulsive force of the springs 6 at fastening a rivet, the die 3 shifts in the counter punching direction, with the center pin 4 projecting from the through-hole 3d, making the self-piercing rivet expanding in the radial direction. The self-piercing rivet fastening device is characterized in that the prescribed repulsive force can be continuously varied. COPYRIGHT: (C)2004,JPO