| 摘要 |
An apparatus for automatically causing the end face of a self-piercing nut (N) to function as a punch for piercing a metallic panel (P) laid on a caulking die (1) so that the nut is fixed to the panel. The apparatus has a pair of gripping fingers (31, 32) attached to the opposite sides of the lower end of a striking punch (2), and has a workpiece butting leg member (25) extending in parallel with a vertical bore (4) formed through a slide guide (3). The leg member (25) is attached to and depends from the bottom surface of the slide guide (3), so that the punch (2) holding the nut (N) by means of the gripping fingers (31, 32) will penetrate the slide guide (3) and then descend along the leg member (25), until the nut punches and is secured to the metal panel (P). Thus, the self-piecing nut (N) can be fixed to any bent bottom of or any narrow recess in the metal panel (P).
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