Ultrasonic vibrator for metal microwire drawing
An ultrasonic and vibrator technology, applied in the field of ultrasonic vibrating wire drawing vibrator, can solve the problems of insufficient breaking force, low yield, and unstable radial dimension of high-carbon steel microwires, and achieve the goal of reducing wire surface defects and increasing yield Effect
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Embodiment 1
[0049] The piezoelectric ceramic 2 works in the D33 resonance mode; when the pulling force is not less than 12N, the two piezoelectric ceramics in the ultrasonic vibrator for metal microwire drawing provided by the present invention have the same amplitude and the same frequency as the vibrator Excited by an AC voltage signal at a parallel resonant frequency, high-frequency longitudinal mechanical vibration is generated through the inverse piezoelectric effect of the piezoelectric ceramic 2 polarized in the thickness direction, and then the ultrasonic vibration of the wire drawing die 6 is realized. The ultrasonic vibrator works in the power bootstrap mode . In the power bootstrap mode, the output power of the ultrasonic vibrator increases automatically as the load increases.
Embodiment 2
[0051] The difference between this example and Example 1 is that when the pulling force is not greater than 5N, the excitation frequency of the ultrasonic vibrator is equal to the series resonance frequency of the vibrator, and the ultrasonic vibrator works in a low-voltage driving mode, and the rest is the same as that of Example 1. In the low-voltage driving mode, the ultrasonic vibrator can realize large-amplitude ultrasonic vibration output under the driving of high-frequency alternating current with an effective value of only tens of volts.
Embodiment 3
[0053] The difference between this implementation case and implementation case 1 is that when the pulling force is greater than 5N and less than 12N, the excitation frequency of the ultrasonic vibrator is equal to the average value of the parallel resonant frequency and the series resonant frequency of the vibrator, and the ultrasonic vibrator works in the mixed mode, and the rest Same as Example 1. In hybrid mode, the ultrasonic vibrator takes into account the low-voltage drive characteristics of series resonance and the power bootstrap characteristics of parallel resonance.
[0054] The ultrasonic vibrator used for drawing metal microwires provided by the invention solves the existing problems of low metal microwire drawing yield, poor wire surface quality, and small ring diameter. The vibrator is a half-wavelength longitudinal wave ultrasonic vibrator, two pieces of piezoelectric ceramics are polarized along the thickness direction, and work in the D33 mode; only the wire d...
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