B - Operations – Transporting – 21 – F
Patent
B - Operations, Transporting
21
F
B21F 3/06 (2006.01) B21F 3/02 (2006.01)
Patent
CA 2742491
The invention relates to a method for making a variable pitch spring (9), in which a spring wire (1) is bent using bending lugs (5, 6) so as to impart a spiral configuration thereto, a gap is formed between the turns by placing, between the turns being formed, the bevelled side of a rotary disc (2) having a rotation synchronised with the spring wire supply, the disc (2) having a bevelled profile that varies along the periphery of the disc, and the spring wire is cut (3) at the end of the formation of each spring.
Un procédé de fabrication d'un ressort (9) a un pas variable, selon lequel on courbe un fil à ressort (1) à l'aide de doigts recourbeurs (5,6) en sorte de lui donner une configuration en spirale, on génère un écartement entre spires en interposant entre des spires en cours de formation la tranche en biseau d'un disque rotatif (2) dont la rotation est synchronisée avec l'amenée de ce fil à ressort, ce disque (2) ayant un profil en biseau qui est variable le long de la périphérie de ce disque, et on coupe (3) le fil à ressort à la fin de la formation de chaque ressort.
Huon Serge
Ressorts Huon Dubois
Robic
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