Single driven ultrasonic elliptical vibration turning device

Abstract

The invention discloses a single driven ultrasonic elliptical vibration turning device. The single driven ultrasonic elliptical vibration turning device comprises a shell unit, an ultrasonic vibration transducer arranged in the shell unit, an elliptical vibration mode converter and a cutter arranged at the front end of the elliptical vibration mode converter, wherein the shell unit comprises an upper cover plate, a supporting plate, an outer sleeve and a lower cover plate; the ultrasonic vibration transducer comprises a bolt and a rear cover plate, a piezoelectric ceramic piece, an electrode slice and a front cover plate which are sequentially sheathed on the bolt; the rear cover plate, the piezoelectric ceramic piece, the electrode slice and the front cover plate are tightly pressed and fixed by the front cover plate and the bolt through threaded connection; the elliptical vibration mode converter is arranged at the front end of the front cover plate and takes the shape of a cylinder on the whole, and three rectangular notches which are distributed in a staggered manner are respectively formed in the left side and the right side of the elliptical vibration mode converter.

Description

Technical field [0001] The invention relates to the field of ultrasonic vibration using the inverse piezoelectric effect of piezoelectric ceramics, in particular to a single excitation ultrasonic elliptical vibration turning device. Background technique [0002] Ultrasonic elliptical vibration has a wide range of applications in the fields of ultrasonic vibration cutting, ultrasonic welding, ultrasonic grinding, ultrasonic polishing, linear ultrasonic motors and rotary ultrasonic motors. At present, researchers mostly use two vibration forms of longitudinal vibration, torsional vibration, bending vibration and radial vibration to generate ultrasonic elliptical vibration. It is necessary to use two or more piezoelectric ceramic sheets to excite and generate a certain phase. For two or more different vibration modes, each group of piezoelectric ceramics must be equipped with an ultrasonic drive power signal, and the phase difference between each ultrasonic drive power signal needs ...

AI Technical Summary

Problems solved by technology

At present, most researchers use two vibration forms of longitudinal vibration, torsional vibration, bending vibration and radial vibration to combine to generate ultrasonic elliptical vibration. If there are two or more vibration modes, each group of piezoelectric ceramic sheets must be equipped with an ultrasonic drive power signal, and the phase difference between the ultrasonic drive power signals needs to be controlled. The structure of the ultrasonic vibration system and control system is complex. , high manufacturing difficulty, high control difficulty, high production cost, difficult miniaturization, and unstable working performance, these problems restrict the application and promotion of ultrasonic elliptical vibration transducers in industrial production

[0003] In order to overcome the deficiencies in the above-mentioned ultrasonic elliptical vibration transducer technology, the paper "Elliptic Vibration Cutting Transducer Based on Finite Element Analysis" of "Journal of Beijing University of Aeronautics and Astronautics" in February 2005, Volume 31, No. 2, proposed a An ultrasonic elliptical vibration cutting transducer with an asymmetric structure excited by a single electric signal, and the finite element dynamic analysis and experimental research on the transducer have achieved good experimental results, but it is necessary to further increase the longitudinal vibration to The conversion of bending vibration, increasing the ratio of the short axis to the long axis of the elliptical vibration track, and improving the cutting effect, it is not ideal to only rely on adding mass blocks and tools on the front end side of the horn, and from the horn to the additional mass Two physical connections are required between the block and the additional mass block to the tool, resulting in a large loss of ultrasonic vibration energy from the piezoelectric transducer to the tool, which affects the cutting effect of ultrasonic elliptical vibration

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