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Name of Experiment：application of power amplifier in ultrasonic - assisted punching experiment of polyurethane microarray

Experimental Equipment：signal generator, power amplifier ATA-4052, transducer, amplitude transformer

Experimental Principle：according to the ultrasonic module designed for the existing polyurethane microhole array punching device, the ultrasonic assisted punching experiment of polyurethane microhole array was carried out to summarize the optimization effect of ultrasonic vibration and verify its general optimization law.

Experiment Process：

1. The composition of the ultrasonic module

The ultrasonic module mainly includes four parts: signal generator, which can realize accurate frequency regulation and output signal amplitude of 0 V~5 V. Power amplifier, compensates the output voltage of signal generator, amplifies the output signal accurately and adjusts the magnification times manually, so as to meet different processing needs. Transducer, converts ultrasonic power output signal into mechanical oscillation signal.Amplitude transformer,amplifies the transducer output amplitude to meet machining requirements.

2.Design of amplitude transformer

3.Construction of ultrasonic assisted polyurethane blanking device

Experiment Result：

（1）The vibration waveform of punch front is consistent with the output waveform of ultrasonic power supply, which is simple harmonic shape

Oscilloscope measurement results                 Amplitude measurement result

（2）A power amplifier was used to adjust the amplitude of the ultrasonic power supply signal to 50V, 75V, 100V, 125V and 150V, and the amplitude of the ultrasonic module was measured. The measurement results are shown in Figure 4.15. With the increase of the output signal amplitude, the amplitude increases linearly. In subsequent tests, different amplitudes will be obtained by adjusting the signal amplitude to meet the corresponding processing requirements.

Amplitude measurement results of punch front face under different output amplitudes

（3）Optimization of ultrasonic vibration

Parameters and appearance of ATA-4052：