Dynamic characteristics analysis and optimization design of medical grinding machine

In order to improve the stability and reliability of medicinal grinding machine, reduce vibration and noise, and enhance the strength of load-bearing, a scheme for optimizing dynamic response characteristics without increasing mass was proposed based on multi-objective optimization methods. Using the finite element method, the modal analysis was conducted on the entire model of the grinding machine to determine its natural frequencies and vibration modes. The structural optimization design was carried out with the optimization goal of having a sixth-order natural frequency below 30 Hz and a seventh-order natural frequency above 100 Hz. The stress distribution was obtained by conducting the strength analysis on the connecting rod structure. The optimization design of the structure was carried out with the minimum value of the stress peak and the maximum value of the fatigue safety factor as the optimization objectives. The results show that the multi-objective optimization method can make the equipment avoid the resonance zone and reduce the peak stress, which is of great significance for improving the performance of the medical grinding machine.