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Torsional wave ultrasonic vibrator for metal microwire drawing

A technology of ultrasonic vibrators and microwires, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, generators/motors, etc., can solve problems such as low yield, small ring diameter, frequent broken wires, etc. problem, to achieve the effect of improving the yield

Pending Publication Date: 2021-01-22
泽川精密科技(宁波)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cold plastic deformation ability of high carbon steel filaments is poor
And because the diameter of the wire is too thin, the current drawing speed of high-carbon steel microwires with a diameter of less than 0.055mm is lower than 3m / s and the wire breaks frequently, and the yield is less than 50%. High-carbon steel with a diameter of less than 0.045mm Microwire yield is even lower than 35%
In addition, the high-carbon steel microwires produced by the existing drawing technology have insufficient breaking force, unstable radial dimensions, small ring diameters, and cracks on the surface, which limit the industrial application of high-carbon steel microwires

Method used

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  • Torsional wave ultrasonic vibrator for metal microwire drawing
  • Torsional wave ultrasonic vibrator for metal microwire drawing
  • Torsional wave ultrasonic vibrator for metal microwire drawing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The piezoelectric ceramic 2 works in the torsional wave resonance mode; when the pulling force is not less than 25N, the two piezoelectric ceramic sheets (2) in the torsional wave ultrasonic vibrator for metal microwire drawing provided by the present invention adopt an amplitude are equal, the frequency is equal to the parallel resonance frequency of the vibrator, and the AC voltage signal is excited, and the inverse piezoelectric effect of the circumferentially polarized piezoelectric ceramic (2) generates high-frequency torsional mechanical vibration, thereby realizing the ultrasonic vibration of the wire drawing die (6), The ultrasonic vibrator works in power bootstrap mode. In the power bootstrap mode, the output power of the ultrasonic vibrator increases automatically as the load increases.

Embodiment 2

[0050] The difference between this implementation case and implementation case 1 is that when the pulling force is not greater than 10N, 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. All the other are identical with embodiment 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

[0052] The difference between this example and Example 1 is that when the pulling force is greater than 10N and less than 25N, 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 a mixed mode. All the other are identical with embodiment 1. In the hybrid mode, the ultrasonic vibrator takes into account the low-voltage drive characteristics of the series resonance and the power bootstrap characteristics of the parallel resonance.

[0053] The torsional wave 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, and the piezoelectric ceramic sheet 2 is polarized along the circumferential direction; the wire drawing d...

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Abstract

The invention discloses a torsional wave ultrasonic vibrator for metal microwire drawing. The torsional wave ultrasonic vibrator comprises an outer shell, piezoelectric ceramic, a conductive copper pad and a wire drawing die, wherein the piezoelectric ceramic and the conductive copper pad are arranged in the outer shell, and the wire drawing die is connected in the outer shell. The piezoelectric ceramic comprises top piezoelectric ceramic and bottom piezoelectric ceramic, the top piezoelectric ceramic and the bottom piezoelectric ceramic are polarized in the circumferential direction, the polarization polarities of the top piezoelectric ceramic and the bottom piezoelectric ceramic are opposite, and the piezoelectric ceramic works in a torsional resonance mode; and the conductive copper padis arranged between the top piezoelectric ceramic and the bottom piezoelectric ceramic. An alternating electric signal generated by an ultrasonic driver is converted into ultrasonic vibration energythrough a piezoelectric ceramic piece, and the ultrasonic vibration energy is transmitted to the wire drawing die, so that vibration of the wire drawing die and a metal wire is excited, and the effectof the ultrasonic vibration energy on plastic forming of a metal material is achieved.

Description

technical field [0001] The invention belongs to the technical field of ultrasonic vibration wire drawing vibrators, and in particular relates to a torsional wave ultrasonic vibrator used for drawing metal microwires. Background technique [0002] High carbon steel wire is mainly hardened by proper heat treatment or cold drawing to make it have high strength and hardness, high elastic limit and fatigue limit (especially notch fatigue limit). [0003] High-carbon steel microwires with a diameter of less than 0.1mm are generally produced by a water tank wire drawing machine. However, the cold plastic deformation ability of high carbon steel filaments is poor. And because the diameter of the wire is too thin, the current drawing speed of high-carbon steel microwires with a diameter of less than 0.055mm is lower than 3m / s and the wire breaks frequently, and the yield is less than 50%. High-carbon steel with a diameter of less than 0.045mm Microfilament yield is even lower than ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/00H02N2/12
CPCH02N2/001H02N2/12
Inventor 杨远才
Owner 泽川精密科技(宁波)有限公司
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