Apparatus for automatically fixing the self-piercing nuts

Details Apparatus for automatically fixing the self-piercing nuts Apparatus for automatically fixing the self-piercing nuts

B - Operations, Transporting

21

J

B21J 15/00 (2006.01) B23P 19/00 (2006.01) B23P 19/06 (2006.01)

Patent

CA 2141928

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).

Cette invention concerne un appareil chasse-écrou à griffes (N) faisant dudit écrou un poinçon perçant un panneau métallique posé sur une matrice de matage (1) qui assure la fixation de l'écrou au panneau. L'appareil comporte une paire de doigts de serrage (31, 32) fixés sur les côtés opposés de l'extrémité inférieure d'un percuteur (2) et une patte de guidage latéral (25) parallèle à un alésage central (4) pratiqué dans un guide-percuteur (3). La patte (25) est fixée à la face inférieure du guide-percuteur (3) pour que le percuteur (2) maintenant l'écrou (N) au moyen des doigts de serrage (31, 32) pénètre dans le guide-percuteur et puisse descendre le long de la patte (25) jusqu'à enfoncement et fixation de l'écrou au panneau métallique (P). Ainsi, l'écrou à griffes (N) peut être fixé dans tout creux ou évidement étroit du panneau métallique (P).

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