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Autori: M.Susan, L.G.Bujoreanu, D.G.Galusca, C.Munteanu, V.Iliescu
Editorial: CENIM, Revista de Metalurgia de Madrid, 40, p.109-117, 2004.
After a brief review of the „friction reversion mechanism” during ultrasonic vibration drawing of tubes (UVD), the paper introduces a method to determine the drawing force based on the theorem of total consumed power, in the case of tube processing. The experiments performed on tubes made from 10TiNiCr180 (AISI321) austenitic stainless steel confirm the superiority of UVD technology as compared to classical technology (CT) regarding the diminution of the drawing force, the increase of the plasticity and the improvement of the safety coefficient, tendencies that are enhanced with the decrease of the relative drawing rate. The best results were obtained for the relative drawing rate of 0.12 for which the drawing force decreased with 33 %, plasticity increased with 9 % and safety coefficient with 22 %, as compared to CT.
Cuvinte cheie: ultrasonic vibration drawing, friction reversion mechanism, relative drawing rate, drawing force, tube, kinematic characteristics, mecxhanical tests, plasticity, safety coefficient