Stability Study On The Influence Of The Ultrasonic Cutting Load On Ultrasonic Cutting Acoustic System

The composite materials have been widely used in the fields of aviation and ship because of Its good performance,such as cellular composites and carbon fiber composites and so on.Compared with ordinary materials,the composite materials are not only the special properties of the materials themselves,but also the structural complexity of the composite materials,it is precisely because of the above two points resulted in the difficulty of the composite material.The way of the traditional processing composite material used is the high-speed milling,this way can really efficient process of composite,but the process produced a large number of harmful dust,also the surface quality of the processing of the composite itself and is not very ideal,the surface will burr,crack and so on.In view of the problems in the process of composite materials,some scholars have proposed the way of ultrasonic processing to improve the problems.In this paper,the research of ultrasonic cutting is for rough machining of composite materials of the proposed,but the existing on ultrasonic cutting research is not mature,especially in terms of stability,under the load of the ultrasonic cutting system prone to vibration stop,calorific wait for a phenomenon.In this paper,the ultrasonic cutting acoustic system is the object of study,the research on the stability of the acoustic system after load influence.The main research contents and achievements are as follows:(1)At present,the design of ultrasonic cutting acoustic system is that the acoustic system which is distributed into the piezoelectric transducer and the variable amplitude rod is designed separately,even if the existing analysis of the load is only for the transformer,but the load is the actual object is the whole system.This paper uses the four-terminal network method to unify the piezoelectric transducer,the variable amplitude link and the load,establish the overall model of the acoustic system,and obtain the expressions of load-impedance,load-current-amplitude and so on,use MATLAB to image the influence of load on the parameters of acoustic system,for load analysis of concrete laid a theoretical foundation.(2)Aiming at the problem that the tool load can’t be parameterized in design,use ANSYS software to model the tool and system,compare the acoustic system of the acoustic system after the load of the tool with the acoustic system of the no-load,the simulation results show that the quality of the tool is higher and the vibration frequency of the acoustic system is smaller.The impedance and output displacement of the acoustic system are detected by using the impedance analyzer and laser displacement sensor,the experimental results show that the resonant frequency of the acoustic system is reduced when the load is increased,and the impedance of the resonance is changed,and the energy conversion efficiency of the system is lower.The results of the experiment provide a reference for the design of the tool.(3)Aiming at the phenomenon of the system to stop vibration,noise under ultrasonic cutting force load,firstly,analyze the ultrasonic cutting force model,then decompose the ultrasonic cutting force along the coordinate system of the acoustic system,analyze the three direction of the movement and force.The force of three directions is applied to the acoustic system by using the digital push gauge,and the performance of the whole acoustic system is detected.Then the acoustic performance of the acoustic system in the acoustic system is detected on the ultrasonic cutting platform.Experiment obtains the relationship between the force and the frequency offset,the amplitude,the impedance,and so on.It can provide theoretical guidance for practical process.