Magnetostriction longitudinal-tersional compound ultrasonic vibration transducer

Abstract

The invention discloses a magnetostriction longitudinal-tersional compound ultrasonic vibration transducer, which comprises a magnetostriction material piece, an amplitude-change pole, a first electrode slice, a second electrode slice, a coil framework and a coil. The first electrode slice and the second electrode slice are arranged on two ends of the magnetostriction material piece; the second electrode slice is arranged between the amplitude-change pole and the magnetostriction material piece and presses against the amplitude-change pole and the magnetostriction material piece; the first electrode slice and the second electrode slice are electrically connected with the outside, so that an alternating toroidal magnetic field is produced in the magnetostriction material piece; the coil framework sleeves on the periphery of the magnetostriction material piece; the coil winds on the coil framework; the coil is electrically connected with the outside, so that an alternating axial magnetic field is formed in the magnetostriction material piece; and the two magnetic fields are coupled to excite the magnetostriction material piece so as to realize longitudinal-tersional resonance. The magnetostriction longitudinal-tersional compound ultrasonic vibration transducer is simple and compact in structure, and beneficial to realizing a miniature design, the output power and the output amplitude can be increased, and the processing quality and the processing efficiency are improved.

Description

technical field [0001] The invention relates to the technical field of ultrasonic precision special processing, and more specifically, relates to a magnetostrictive longitudinal-torsional composite ultrasonic vibration transducer. Background technique [0002] In the high-speed cutting of hard and brittle materials, rotary ultrasonic machining (that is, the tool head rotates at high speed while adding ultrasonic mechanical vibration) can reduce cutting force, reduce tool wear, and improve processing quality and processing efficiency. Relevant studies have shown that: while the tool head rotates at high speed, longitudinal and torsional ultrasonic mechanical vibrations are added, that is, longitudinal-torsional composite ultrasonic vibrations, which can further reduce cutting forces and improve processing quality and efficiency. At present, there are two ways to realize the generation of torsional vibration: direct excitation of tangentially polarized piezoelectric ceramics a...

AI Technical Summary

Problems solved by technology

The energy conversion efficiency of the device is low, and there are difficulties in the design, it is difficult to ensure the resonance of longitudinal vibration and torsional vibration

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