在频率跟踪后引起振动切削过程中振幅衰减的主要原因分析

为克服振幅衰减对超声振动切削的影响,揭示振幅衰减的内在原因,进一步扩大超声振动切削的应用领域,本文通过实验研究和理论分析,明确了在振动加工中由载荷增加而引起的功率动态分配也是超声波振幅逐渐衰减的一个重要原因,并从功率分配的角度,通过理论分析得出了二者的数学表达式,解释了实验结果,同时分析了该实验的合理性,给出了几种解决方案,并提出了用神经网络分析振动切削力的思想.实验结果最终表明:在采用频率跟踪后,超声振动加工中的振幅衰减主要来源于功率分配.

Analysis on the Primary Cause of Causing Amplitude Attenuation in the Ultrasonic Vibration Cutting after Frequency Tracking

In order to overcome the amplitude attenuation which has an influence on the ultrasonic vibration cutting,discover the internal reasons of the amplitude attenuation,and further enhance the application domain of the ultrasonic vibration cutting,through experiment and theoretical analysis,the paper gets a conclusion that the dynamic distribution of power caused by the increase of load in the vibration cutting is an important reason for the gradual degradation of the amplitude of ultrasonic wave,and gets two mathematical expressions through the theory analysis of power budget angle.Meanwhile,the paper analyzes the experimental rationality,produces several projects to the problem,and gives an idea to analysis the vibration cutting force through the neural networks.Finally,the result of experiment indicates that the distribution of power is the main reason of amplitude attenuation in the ultrasonic vibration cutting after frequency tracking.