Measurement of the natural frequencies and critical speed of roll-tensionned discs

E. Aubry (1) , D. Fendeleur (2) , F.M. Schmitt (1) , M. Renner (1)

1 IRIMAS - Institut de Recherche en Informatique Mathématiques Automatique Signal
2 Leuco-Production

Thin steel discs can be used to make circular saw plates. The process of roll-tensioning is traditionally used to increase the stability of rotating discs at high rotation speed, and so dynamic properties and critical speed, which determines the maximum stable rotation speed of the disc. Roll-tensioning consists in introducing a residual stress state in the plate. The structure is locally deformed between two opposite pinch rollers in rotation which rotate the plate. This creates a plastic deformation along a circular zone at constant radius. Manufacturers are generally able to roll tension acceptably through know-how gained from experience. However, this is done, very often, without any scientific knowledge. In parallel, many efficient theories have been developed by several scientists to explain the dynamic phenomena which occur. Our principal target in this paper is to expose how we developed a reliable method to determine the critical speed in connection with the roll-tensioning process applied to the structure. This method is to allow the quantification of roll tensioning during the production process, in industrial situation.

Mots clés: roll-tensioning; critical speed

Domaines: Mécanique [physics.med-ph]

E. Aubry, D. Fendeleur, F.M. Schmitt, M. Renner. Measurement of the natural frequencies and critical speed of roll-tensionned discs. Experimental Techniques, 2000, 24 (4), pp.22-25. ⟨10.1111/j.1747-1567.2000.tb00921.x⟩. ⟨hal-00956809⟩