GOLD-ALLOY SMALL SPRING FORMING METHOD Russian patent published in 2007 - IPC B21F35/00 B21C1/00 A44C27/00

Abstract RU 2295417 C2

FIELD: manufacture of jewelry articles, possibly manufacture of gold-alloy small springs of locks of snap hooks in jewelry industry.

SUBSTANCE: method comprises steps of winding from wire prepared by deforming alloy at several stage with intermediate annealing between said stages small spring; at last stage deforming alloy by drawing at total reduction degree exceeding 85% but less than 95%. Preferably drawing of wire is started from initial diameter of wire d_in = 1mm till final diameter d_f= 0.35 mm for 13 passes at total reduction degree 87.3%. Spring is made of gold alloy with purity 385.

EFFECT: enhanced elastic properties of spring, improved manufacturing process for realizing the method.

3 cl, 1 ex

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RU 2 295 417 C2

Authors

Mal'Tsev Aleksandr Ivanovich

Luchshev Vitalij Vital'Evich

Dates

2007-03-20—Published

2004-10-01—Filed