Research on Vibration Characteristics of a Ceramic Spindle Based on the Reverse Magnetic Effect

Advances in Materials Science and Engineering

et al. 2021

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The dynamic balance is a significant issue for the nonlinear dynamic characteristics of the spindle rotor system. However, there is a problem that the dynamic balance is lacking detailed study on optimization method. In the paper, a modal dynamic balance optimization model of spindle rotor system is proposed, which can intend to improve the accuracy of spindle rotor system modal dynamic balance. Because the multiorder unbalance components are the main spindle rotor system mode shapes, the particle swarm optimization (PSO) method is adopted. The sum of squares of residual vibration after balancing is taken as the optimization objective, and the correction is presented as the optimization variable in the optimization model. The optimal correction weight of every unbalance component is calculated through a modal matrix equation of PSO. The vibration amplitude that is greatly reduced after optimization balance is presented under different conditions. The balancing effect shows a better dynamic characteristic than that of traditional methods. And the fluctuation range of the axis track of the rotor system also shows reductive phenomenon. The proposed optimization spindle rotor system model is well verified through experiments. It can contribute a theoretical optimization foundation for available dynamic balance in spindle rotor system.

“…Assuming that the unbalanced force on the spindle rotor system is F(z), the vibration differential equation of the motorized spindle is shown in the following equation [20]:…”

Section: Modal Balance Methods Based On Particle Swarm Optimizationmentioning

confidence: 99%

Research on Dynamic Balance of Spindle Rotor System Based on Particle Swarm Optimization

Zhan

Advances in Materials Science and Engineering

et al. 2021

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“…e harmonic loss of the ceramic motorized spindle cannot be ignored. e eccentric air gap magnetic density of the stator and rotor is shown in the following equation [27]:…”

Section: Eccentric Magnetization Model Of a Ceramicmentioning

confidence: 99%

Research on Ceramic Spindle Loss Based on Ceramic Reverse Magnetic Effect

Zhang

Mathematical Problems in Engineering

Bai

et al. 2020

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Ceramic motorized spindle is a multifield, nonlinear, and strong coupling system. The present model ignores the reverse magnetic effect and has a poor accuracy on the loss of the spindle system. In the paper, Park transformation was used to establish the electromagnetic physical model of ceramic motorized spindle. By combining with the Jiles–Atherton theory, an eccentric magnetization model of a ceramic motorized spindle considering reverse magnetic properties was established. Energy consumption parameters were calculated under various working conditions. The influence of ceramic reverse magnetic characteristics on the motorized spindle loss was analyzed and verified by experiments. The results show that the simulation of the ceramic motorized spindle loss model is in good agreement with the experimental results. Compared with the experimental results, the average loss error was 2.1%. Due to the reverse magnetic characteristics, the application of ceramic motorized spindle can help reduce the system loss. The ceramic motorized spindle model provides a theoretical basis for the development of ceramic spindle energy loss and efficiency.

“…Due to the reverse magnetic properties of ceramic materials, the electromagnetic mechanism of ceramic materials is quite different from that of metal motorized spindle, so the current models cannot meet the accuracy requirements of electromagnetic field calculation. Zhang et al 14 is mainly attributable to the calculation accuracy of the magnetic field considering the ceramic materials properties and air gap eccentricity. The variation of the unbalanced magnetic force had a great effect on the rotor system dynamic characteristics, and it was discussed by simulation method.…”

Section: Introductionmentioning

confidence: 99%

Analysis of dynamic characteristics of ceramic spindle considering the thermal magnetic coupling effect

Proceedings of the Institution of Mechanical Engineers, Part C:

Zhang

Bai

et al. 2022

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The ceramic spindle rotor system is widely used in CNC machine tools. However, the dynamic characteristics are influenced by the magnetic forces and thermal deformation, which leads to the reduction of running accuracy. In this paper, the thermal deformation of the rotor system are calculated, and the magnetic field distribution is obtained based on the Maxwell theory. The thermal magnetic coupling effect is then analyzed to investigate the interaction between thermal deformation and magnetic force, and the impact of thermal magnetic coupling effect on the dynamic characteristics is obtained. Experiments are conducted to verify the simulation results, and the dynamic characteristics with and without consideration of thermal magnetic coupling effect are compared. Results show that the thermal deformation and magnetic force have nonlinear increases with speed, and the model considering the thermal magnetic coupling effect has a higher accuracy with the error decreased by 4%. The air gap is a key factor that determines the dynamic characteristics of the ceramic spindle rotor system, and a larger air gap can help lower the vibration at high speed. This study provides a theoretical basis for the structural design of ceramic spindle rotor system.