The effect of material and location of the spindle on the vibration behavior of Gate milling machine

In this article, The natural frequency of the system was calculated based on the location of the height and lateral location of the spindle, and by changing the structure of the structure, the best form was introduced to reduce unwanted vibrations. The natural frequency is in the range of 28-48, which is much lower than the frequency of the motor or the spindle, it can be confidently stated that the phenomenon of resonance will not occur. Based on the shape of the extracted modes corresponding to the first six natural frequencies of the system, considering both aluminum and steel for the structure of the device, it has been investigated. The simulation results showed that changing the position of the spindle in the direction of height does not have significant changes on the natural frequency of the structure and the shape of the modes corresponding to them. In changing the lateral position of the spindle in the sixth mode, it was observed that the natural frequency corresponding to when the spindle is located on both sides of the structure is 25% higher than when the spindle is located in the middle of the work table. It was also found from this analysis that the frequency range mentioned in the previous part (48-28 Hz) has changed to 63-28 Hz.