Study of dynamics of main drive of pilger pipe cold rolling mill

Abstract

Elimination of nonstable deformed state of main drive systems of Pilger pipe cold rolling (PCR) mills with distributed parameters is often stipulated by dynamics stabilization of multi-mass in-line mechanical system. Increase of productivity and optimal conditions of PCR mills loading is reached by dynamic synthesis of base mechanisms. Results of study of force line dynamics of PCR mill with embedded doubled elastic clutch or torsion damper presented. A nonlinear dynamic model of the main force line of a PCR mill with compensating doubled elastic clutch created. A solution of the dynamic synthesis of PCR mill force line task was obtained by nonlinear programming application. To decrease dynamic loads level, an optimal synthesis of the damper system of PCR mill force line was accomplished. A methodology of synthesis of parameters of nonlinear mechanical system with elastic clutch and damper proposed, as a mean to decrease destructive torsion oscillations in the main force line of PCR mill. Harmonic linearization of integral equations of mill main force line motion carried out, recorded by pulse-frequency characteristics. It was established that since the number of equations equals to the number of nonlinear effects of the mechanical system, the task solutions practically does not depend on the degree of freedom of the selected model. It was shown that the results obtained were adequate to the results of experimental studies of mill ХПТ 32 force line.