Giant magnetostictive longitudinal-torsional coupled vibration ultrasonic transducer

Abstract

The invention discloses a giant magnetostictive longitudinal-torsional coupled vibration ultrasonic transducer which comprises a transducer main body, a coil support and a shell, wherein the shell comprises a top plate, a base plate as well as a plurality of giant magnetostictive bar installation pipes, a plurality of giant magnetostictive bars, a first magnetic conduction sheet, a second magnetic conduction sheet, an upper cover plate, a lower cover plate, a fastening element, a magnetic element and a coil; the plurality of giant magnetostictive bar installation pipes are arranged between the top plate and the base plate; the plurality of giant magnetostictive bars are respectively installed in the giant magnetostictive bar installation pipes; the coil is reeled on the coil support; the coil and the fastening element are coaxial; and an ultrasonic frequency alternating current is introduced into the coil so as to generate an alternating magnetic field to drive the giant magnetostictive bars to generate longitudinal-torsional coupled vibration. According to the giant magnetostictive longitudinal-torsional coupled vibration ultrasonic transducer provided by the embodiment of the invention, parts are reduced; and the structure of the transducer is simplified, so that the structure of the transducer is compact, and the ultrasonic energy can be transmitted efficiently.

Description

technical field [0001] The invention relates to the technical field of ultrasonic precision instrument processing, in particular to a giant magnetostrictive longitudinal-torsional composite vibration ultrasonic transducer. Background technique [0002] At present, in ultrasonic processing (such as drilling, milling, etc.), piezoelectric longitudinal vibration transducers are mainly used, that is, piezoelectric ceramics are used as electrical-mechanical energy conversion elements, and the mechanical vibration generated is longitudinal vibration (that is, along the spindle axis). Studies have shown that the introduction of torsional vibration (that is, tangential along the spindle) in ultrasonic machining can reduce cutting torque and cutting force (such as drilling force, milling force, etc.), improve processing quality, and extend tool life. [0003] For piezoelectric transducers, torsional vibration can be generated by the following two types of methods: [0004] 1. Fabri...

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Problems solved by technology

[0006] These methods have more vibration conversion devices, the structure is relatively complex, the energy conversion efficiency is low, and the output power is small, which is not suitable for high-power rotary ultrasonic machining.

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