Double-excitation longitudinal-torsional combined ultrasonic vibration device

Abstract

The invention relates to the technical field of ultrasonic vibration machining, in particular to a double-excitation longitudinal-torsional combined ultrasonic vibration device. The device comprises two ultrasonic vibrators used for generating longitudinal ultrasonic vibration, an amplitude-change pole used for converting the longitudinal ultrasonic vibration generated by the two ultrasonic vibrators into longitudinal-torsional combined vibration, and a cutter used for cutting materials. The two ultrasonic vibrators are fixedly installed on the two sides of the upper end of the amplitude-change pole in the modes that the angle inclination exists, and the two ultrasonic vibrators are staggered with each other. The lower end of the amplitude-change pole is fixedly connected with the cutter. By the adoption of the structural arrangement, when the longitudinal ultrasonic vibration generated by the ultrasonic vibrators is transmitted to the amplitude-change pole at a certain angle, an axial component and a radial component can be generated, the axial component enables the lower end of the amplitude-change pole to conduct longitudinal vibration, the radial component enables the lower end of the amplitude-change pole to conduct torsional vibration, waveforms transmitted to the amplitude-change pole are mutually overlapped, the longitudinal-torsional combined vibration can be generated at the lower end of the amplitude-change pole and acts on the cutter, so that cutting machining of the materials is achieved, the cutting force is reduced advantageously, the machining efficiency is improved advantageously, and the machining quality is improved.

Description

technical field [0001] The invention relates to the technical field of ultrasonic vibration processing, in particular to a dual-excitation longitudinal-torsion composite ultrasonic vibration device. Background technique [0002] In the current ultrasonic machining, longitudinal ultrasonic vibration is generally used, and the axial impact force is large, which affects the surface processing effect of hard and brittle materials. Studies have shown that longitudinal-torsional composite vibration is more conducive to reducing cutting force and improving processing efficiency and improving processing quality. There are two main methods to realize longitudinal-torsional composite ultrasonic vibration: one is to polarize the piezoelectric ceramic sheet along the tangential direction, but this method is complex in process, difficult in processing, high in scrap rate, and the prepared transducer has low power. The torsional moment loss is large; the second is to adopt a special struc...

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Problems solved by technology

[0002] In the current ultrasonic machining, longitudinal ultrasonic vibration is generally used, and the axial impact force is large, which affects the surface processing effect of hard and brittle materials. Studies have shown that longitudinal-torsional composite vibration is more conducive to reducing cutting force and improving processing efficiency and improving processing quality.

There are two main methods to realize longitudinal-torsional composite ultrasonic vibration: one is to polarize the piezoelectric ceramic sheet along the tangential direction, but this method is complex in process, difficult in processing, high in scrap rate, and the prepared transducer has low power. The torsional moment loss is large; the second is to adopt a special structural design for the horn, such as the inclined groove type, the spiral groove type, and the mortise and tenon type, so that when the longitudinal wave generated by the transducer is obliquely incident on the groove, torsional vibration is generated, but these inclined grooves Only part of the longitudinal vibration can be converted into torsional vibration, and the torsional vibration is transmitted in the solid horn due to the existence of friction between internal materials, resulting in energy loss, which leads to a small final torsional component

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