Bending mode conversion type ultrasound wave torsional vibration energy converter

Abstract

The invention discloses a bending-twisting conversion type ultrasonic torsion vibration transducer which comprises a bending-twisting vibrating body(1), a drive component (2) and a back cover (3) of the transducer; the drive component (2) is arranged between the bending-twisting vibrating body(1) and the back cover (3) of the transducer, and moreover, an A pretighting bolt (33) passes through the through hole of an A end cover (31), an A through hole (22) and an A pretighting screw hole (121) in turn through to arrange the A end cover (31) and an insulating block (21) on the A top surface (107) of the bending-twisting vibrating body(1); an B pretighting bolt (34) passes through the through hole of an B end cover (32), an B through hole (23) and an B pretighting screw hole (151) in turn to arrange the B end cover (32) and the insulating block (21) on the B top surface (108) of the bending-twisting vibrating body(1). A pair of bending vibrations with the same frequency swings and opposite vibrating directions generated by corresponding two groups of piezoelectric ceramics drive elements are amplified and transmitted to a converter by two bending arms; two bending vibrations are coupled and converted into a coupling torsion vibration (63) through a mode converter; a torsion vibration (64) is obtained and output after being amplified by an amplitude transformer (101), thus obtaining ultrasonic torsion vibration by a simpler mode.

Description

Technical field [0001] The invention relates to an ultrasonic torsional vibration transducer, which is suitable for ultrasonic vibration cutting (vibration drilling, vibration reaming and vibration tapping), ultrasonic welding, ultrasonic motor, ultrasonic fatigue experiment and other fields. Background technique [0002] In the field of vibration cutting, especially the processing of difficult-to-machine materials and the processing of small holes, torsional vibration has obvious advantages. Ultrasonic torsional vibration drilling can significantly reduce drilling force, improve drilling quality, and reduce exit burrs; ultrasonic torsional vibration reaming can suppress the built-up edge generated in low-speed machining and improve the surface quality of the hole; ultrasonic torsional vibration tapping can greatly Reduce tapping torque, improve tapping efficiency, improve tool life and thread quality. [0003] In the field of ultrasonic welding, the use of torsional vibration is...

AI Technical Summary

Problems solved by technology

Theoretically, it is possible to make torsional transducers through tangentially polarized piezoelectric ceramics, but it is difficult to realize tangentially polarized piezoelectric ceramics in the manufacturing process.

Using piezoelectric ceramics polarized in the longitudinal direction can also achieve torsional vibration according to a certain bonding method, but the power and output amplitude of the torsional transducer manufactured by this method are small

The longitudinal ultrasonic vibration can also be converted into torsional vibration through a special structure, but the structure is more complicated

The above reasons limit the application range of ultrasonic torsional vibration

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