Complex study of dynamics of automatic pipe-rolling plant
Journal Title: Metallurgical and Mining Industry - Year 2017, Vol 9, Issue 3
Abstract
The complex solution of a problem of dynamics for the chosen “working stand - shell - mandrelbar” model of automatic pipe-rolling plant TPA taking into account time-varying of the system mass is considered. The differential equations of the movement for elastic elements of the chosen multi mass model of a working stand and specified differential equations of longitudinal oscillations of a mandrel with a bar taking into account change in time of mechanical system mass of automatic mill TPA are worked out. Results of research of dynamics of interaction of the rolled shell with elements of a working stand of the mill taking into account their elasticity are given. Expressions for the corresponding form of oscillations of deformable elements of a working stand of the automatic mill are obtained. Features of dynamics of the mill working stand elements are revealed. Dynamic functioning of a mandrel with a bar in the deformation zone and elastic system of the mechanism of holding of the mill mandrel are presented taking into account influence of non-stationary forces of technological resistance and variability of inertness of the attached mass of the piercing hollow billet. Nature of behavior of the mandrel holding mechanism is established taking into account change in time of the rolled pipe mass and non-stationary cyclic influence from the deformation zone. The complex analysis of non-stationary oscillations of “shell– mandrel –bar” mechanical system is represented by the coefficient of system dynamism.
Authors and Affiliations
S. R. Rahmanov, D. Yu. Garmashev
Keywords
Related Articles
- EP ID EP305939
- DOI -
- Views 129
- Downloads 0
The Analysis on Hydrodynamic Bearings Performance in High-Speed Modules of Wire Rolling Mills
The present article addresses hydrodynamic bearings performance in high-speed modules of wire rolling mills and is searching for the possibilities to increase the reliability of their work. In order to determine the perf...
Reasons of drilling assembly vibration during the operation of rotary drilling rigs
Sources of dynamic loads and nature of their course during the operation of roller-bit drilling rigs are considered. The assumption that dynamic loads when drilling arise because of change of parameters of the rotational...
Intellectual capital as a factor of competitiveness increasing
The article studies the content and interrelation of the concepts “intellectual capital” and “competitiveness”. It is determined that outstanding world scientists have studied the theoretical and practical problems of th...
Determination of spatial position of spindles at elongating mill TPA 5-12″ with pilger mills during rolling-off of large-size bottles
The paper presents and gives solution to the problem of determining optimal geometric parameters of the deformation zone when piercing bottles on elongating mill of pilger installation 5-12″ at PJSC Interpipe NTRP. The d...
Transition to advance technologies of subsoil use
Complex use of mineral resources allows, in addition to scientific and technological achievements, implementing the economic and environmental interests such as producing the maximum possible volumes of competitive produ...