Novel longitudinal-flexural compound space elliptical vibration ultrasonic turning method and device

Abstract

The invention discloses a novel longitudinal-flexural compound space elliptical vibration ultrasonic turning method and device. An amplitude transformer is provided with one small end and three largeends, wherein the first large end and the small end are positioned in the horizontal direction and are coaxial with an amplitude transformer main body; the other two large ends are distributed in theradial direction of the amplitude transformer and are perpendicular to each other; a group of reflecting end, piezoelectric ceramic piece and copper electrode is arranged on each of the three large ends; and the small end serves as a transmitting end, and a cutter is arranged in the center of the outer end part of the small end. Three groups of the ceramic pieces of the novel longitudinal-flexuralcompound space elliptical vibration ultrasonic turning device respectively produce longitudinal vibrations which are perpendicular to each other under the excitation of high-frequency electric signals of an ultrasonic generator, and the two groups of longitudinal vibration force F1 and F2 at the second large end and the third large end are compounded through a special structure of the amplitude transformer, wherein the force F1X and F2X in the horizontal direction are in equal magnitude and opposite directions and cancel out each other; the vibrations in the vertical direction are in the samedirection and are compounded to obtain the force FY, and the force FY is overlapped with the vibration force which is produced at the first large end, so that longitudinal-flexural compound vibrationis obtained at an output end.

Description

Technical field: [0001] The invention relates to an ultrasonic vibration processing equipment, in particular to a novel longitudinal-bending composite spatial elliptical vibration ultrasonic turning method and device. Background technique: [0002] With the continuous development and progress of science and technology, more and more hard and brittle materials are widely used. Due to the poor machinability of such materials, higher requirements are put forward on processing technology. The development and maturity of ultrasonic vibration cutting technology brings new hope to the wide application of such materials. However, when one-dimensional ultrasonic vibration is applied to the processing of cemented carbide materials, the high-frequency vibration of the tool will cause the flank face of the tool to squeeze and rub against the machined surface, and the weak part of the tool will quickly break. Summary of the invention: [0003] The technical problem to be solved by the present...

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Problems solved by technology

However, when the one-dimensional ultrasonic vibration is applied to the machining of cemented carbide materials, the high-frequency vibration of the tool will cause the tool flank and the machined surface to squeeze and rub, and the weak part of the tool will be damaged soon

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