## 6 Responses and Verification of Energy Consumption of Milling Cutter Main Cutting Force  
### Responses of Energy Consumption of Milling Cutter Main Cutting Force  
In order to verify the identification method for the dynamics of the main cutting force energy consumption of the milling cutter, two sets of high-speed milling experiments were carried out, the experimental setup were the same as that in Section 4, and the process parameters in Table 2 was taken as experiment scheme 1, the process parameters in Table 3 was taken as experiment scheme 2.  
According to Table 2, Figures 10 and 11, the energy consumption variation of instantaneous main cutting force of the milling cutter and cutter teeth in scheme 2 were obtained, as shown in Figure 12.  
As shown in Figures 7, 8 and 12, the instantaneous main cutting force energy consumption showed significantly different variations by comparing with schemes 1 and 2. It can be seen that the energy consumption of instantaneous main cutting force of the milling cutter and the cutter tooth were sensitive to the change of the cutting conditions.  
Figure 12: Results of main cutting force energy consumption of milling cutter and cutter teeth of scheme 2, (**a**) energy consumption of cutter teeth, (**b**) energy consumption of milling cutter.  
In order to verify the results of the main cutting force energy consumption of the milling cutter, it is necessary to acquire the main cutting force energy consumption in the experiment, the cutting force along the direction of feed speed, cutting width, and cutting depth in the milling experiments were acquired by using the [PERSON] rotary triaxial dynamometer, as shown in Figure 13.  
According to Figure 13, the measured main cutting force energy consumption was calculated based on the main cutting force and main motion speed measured in experiment, the instantaneous energy consumption of the milling cutter main cutting force of scheme 1 and scheme 2 were obtained, as shown in Figure 14.  
Figure 14: _Cont._  
Figure 13: Installation of cutting force measurement device and measured main cutting force in experiments.  
In Figure 15, \(C_{t}\) is the time-frequency parameter of energy consumption of milling cutter's main cutting force measured in experiments.  
According to Figure 15, the changes in milling cutter speed, feed per tooth, and cutter tooth error, and the milling vibration caused obvious changes in time-frequency parameters of energy consumption of main cutting force. The results showed that the energy consumption distribution function of main cutting force of cutter teeth and milling cutter was sensitive to the changes in cutting parameters.  
In order to reveal the influence of process parameters such as milling cutter speed, feed per tooth, cutting width, and cutting depth on the energy consumption of the milling cutter main cutting force, the influence characteristics of the above parameters on milling cutter main cutting force were studied by single factor analysis method, as shown in Figure 16.  
According to Figure 16, with the increases of each process parameter, the main cutting force energy consumption increases, the reason is that, the increase of the spindle rotational speed lead to the changes in main movement speed, the increase in feed per tooth and cutting width cause the increase of instantaneous cutting layer thickness, the increase in cutting depth and cutting width would affect the length of the cutting edge that the milling cutter instantaneously participates in cutting, the main cutting force energy consumption of milling cutter thus increases.  
Figure 15: Response and verification of time–frequency of main cutting force energy consumption of the milling cutter, (**a**) root mean square, (**b**) kurtosis, (**c**) dominant frequency.