Study on prediction model of thrust force in ultrasonic-assisted drilling of C/SiC composites based on response surface method

Abstract

Through the orthogonal experiments, the influence of machining parameters on the thrust force of C/SiC composites in ultrasonic-assisted drilling was studied. The prediction model of the drilling thrust force is constructed by using the response surface method, and the effects of amplitude, feed rate and spindle speed on the thrust force are analyzed. The smaller thrust force within a certain range of processing parameters is obtained by using the thrust force model to optimize the machining parameters. The result shows that when other processing conditions remain unchanged, the amplitude has the most significant effect on the thrust force, followed by the feed rate, and the spindle speed has relatively little influence on the thrust force in ultrasonic-assisted drilling. When using the optimized machining parameters, the drilling thrust force is reduced and the delamination damage at the drilling hole exit is alleviated.