Abstract:
In order to realize ultraprecision cutting, the amplitude amplifier horn structure of longitudinal-flexural vibration system is designed. By analysis of the horn structure, the influence rule of location (d), angle of inclination(α), length (l) and spacing (h) of chutes on the resonance frequency of the horn and the amplitude of the longitudinal-flexural vibration were revealed theoretically. Under different parameters of chutes, the resonance frequency，amplitude, and rule that modal frequencies are obtained.The results show that with α and l increased gradually, bending amplitude was maximum when α=45° and amplitude value was minimum in the vicinity of d=15 mm.As chute spacing h became larger, the amplitude became smaller were achieved by means of FEA method.The primary and secondary influence of chute parameters on resonance frequency and amplitude was obtained by range analysis of orthogonal parameters. Through experiments, it was discovered that with α and h increased gradually, resonant frequency overall declined.As h increased, amplitude became smaller, and cutting force was changed through influence of α on amplitude. The results of experiments are consistent with the theoretical analysis.
