OSCILLATORY PROCESSES IN A MULTI PARALLEL KINEMATICS MACHINE TOOLS, DUE TO THE GYROSCOPIC TORQUE ACTING ON THE SPINDLE
DOI:
https://doi.org/10.20535/2305-9001.2014.72.37142Keywords:
parallel kinematics machine, spindle rotation, gyroscopic moment, mathematical model, the oscillatory process.Abstract
The aim is to determine the characteristics of oscillatory processes in a multi parallel kinematics machines, due to gyroscopic moments acting on the spindle.
Research challenges raised establishing dynamic loads on the spindle hub, the development of a mathematical model and calculation of vibration processes in a multi parallel kinematics machines.
To solve these problems in the article the features of spatial movement parallel kinematics machine tool spindle. It is shown that the spatial movement of the spindle causes the appearance of gyroscopic moments acting on the spindle. Composite dynamic equilibrium equation spindle mounted on the platform of the machine. Structural mathematical model of the spatial displacement of the spindle under gyroscopic moments. It is shown that the dynamics of the machine parallel kinematics is characterized by structural pattern with cross feedback angular velocity transverse angular vibration platform. In this dynamic influence of rods can be provided in the form of independent random moments acting on individual subsystems, describing cross-platform angular fluctuations relative to two mutually perpendicular axes,. Established that oscillatory processes in dynamical systems with low-frequency component of the machine with frequencies 9,2..9,8 Hz and high-frequency components with frequency 45 ... 55 Hz.
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