F=10 1.79 v 0.14 f 0.12 a p 1.35 =61.69v 0.14 f 0.12 a p 1.35
The F-test was used to test the regression equation. Since F=11.77>F 0.05 (3,5)=5.41, the regression equation is quite significant. Each of the independent variables in the regression equation uses the t test, because t3>1, the depth of cut is a non-negligible factor for the cutting force. From the index of the regression equation, the influence of f, v, a p on the cutting force is increasing. According to the relationship between cutting force and various factors, the cutting force is basically proportional to the depth of cut, which is similar to the general cutting rule; the feed rate also has a positive influence on the cutting force, but the degree of influence on the cutting force is not as good as the cutting depth; The degree of influence of the cutting force is greater than the feed amount. This is because, as the cutting speed increases during vibration cutting, the effective cutting time of the tool increases during the vibration cycle, resulting in an increase in cutting force.5 Conclusion
Compared to conventional turning, ultrasonic vibratory turning has the significant advantage of a smaller average main cutting force at smaller cutting volumes.When using ultrasonic vibration turning, under the premise of considering the processing efficiency, a small cutting speed should be appropriately selected to effectively reduce the cutting force, thereby reducing the deformation of the process system, and the rigidity of the thin-walled parts and the elongated shaft is poor. Satisfactory machining accuracy is achieved with parts.
From the exponential characteristics of the depth of cut a p , it is necessary to make a p <1 mm to reduce the cutting force, which also shows that ultrasonic vibration turning is particularly suitable for precision and ultra-precision machining.
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