Method of manufacturing helical springs

Details Method of manufacturing helical springs Method of manufacturing helical springs

B - Operations, Transporting

21

F

B21F 35/00 (2006.01) C21D 7/06 (2006.01) C21D 8/02 (2006.01) C21D 9/02 (2006.01)

Patent

CA 2244029

A method of manufacturing helical springs from steel wire. The springs' skin is thermomechanically hardened by shot peening the unstressed springs, followed by thermally detressing them, and shot peening them again. The second shot peening is carried out in at least two steps. The method produces springs that are just as strong as conventional but smaller and lighter in weight.

Méthode de fabrication de ressorts hélicoïdaux en fil d'acier. Le derme des ressorts est durci thermomécaniquement par grenaillage des ressorts non contraints, suivi de l'élimination thermique des contraintes internes puis d'un nouveau grenaillage. Le deuxième écrouissage à la grenaille est effectué en au moins deux étapes. La méthode produit des ressorts qui sont tout aussi robustes que les ressorts traditionnels, mais plus petits et plus légers.

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