Production of periodic bars by vibrational drawing

One aspect of improving blade production is the production of blanks with a periodic profile from nickel and titanium alloys. In certain cases of vibrational deformation (in particular, in vibrational drawing), periodic change in the diameter of rod or wire over its axis is observed. This is associated with frictional oscillation and stability loss in deformation (on reaching the yield point in the rod, with the appearance of necking, or as a result of inertial forces). Formulas are obtained for use in determining the conditions of unstable deformation and stabilizing the production of periodic bars by regulating the parameters of vibrational drawing.