Oscillation excitation method for langevin ultrasonic transducer, ultrasonic machining method, and ultrasonic transmission method
A technology of vibration excitation, processing methods, applied in the direction of cleaning methods and utensils, metal processing, metal processing equipment, etc.
Active Publication Date: 2018-06-08
UWAVE
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Problems solved by technology
[0013] According to the ultrasonic processing device using the new ultrasonic vibrator support structure described in Patent Document 1, many solutions can be seen for the problems of the ultrasonic processing device using the conventionally known structure of the ultrasonic vibrator.
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[0060] The resonant frequency used in the new vibration excitation method of the ultrasonic vibrator of the present invention (compared with the admittance peak corresponding to the resonant frequency that excites the vibration of the longitudinal first-order vibration mode of the ultrasonic vibrator appears on the low frequency side. The existence of the resonant frequency corresponding to the nanopeak value: the resonant frequency that excites the quasi-longitudinal zero-order vibration in this specification) has not been recognized by those skilled in the art before within the scope known by the inventor. In addition, the vibration excitation method of the ultrasonic vibrator using the above-mentioned quasi-zero-order longitudinal vibration has not been practiced so far as far as the present inventors know.
[0061] In order to implement the vibration excitation method of the ultrasonic vibrator utilizing the resonant frequency for exciting the quasi-longitudinal zero-order ...
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To provide a method for exciting ultrasonic oscillation for back-and-forth motion in a novel oscillation mode using a Langevin ultrasonic transducer, an ultrasonic machining method using this novel ultrasonic oscillation, and an ultrasonic transmission method. Provided is a method wherein: a Langevin ultrasonic transducer is prepared that includes a metal block, a metal block provided with a support framework protruding in a ring shape on side surfaces, and a poled piezoelectric element affixed between these metal blocks; the ultrasonic transducer is connected to a base via the support framework and supported in a restrained state; and then voltage having a prescribed frequency is applied to the piezoelectric element in the ultrasonic transducer, thereby exciting, in the ultrasonic transducer, ultrasonic oscillation for back-and-forth motion without holding an oscillation node within an oscillator in a direction perpendicular to a flat surface of the piezoelectric element. Also provided are an ultrasonic machining method and ultrasonic transmission method using this oscillation excitation method for an ultrasonic transducer.
Description
technical field [0001] The present invention relates to a vibration excitation method of a Langevin type ultrasonic vibrator, in particular to an excitation method of ultrasonic vibration in a new vibration mode. The present invention also relates to an ultrasonic processing method and an ultrasonic transmission method using ultrasonic vibrations in a new vibration mode of a Langevin type ultrasonic vibrator. Background technique [0002] As for the ultrasonic vibrator using the piezoelectric element as the source of the ultrasonic wave, ultrasonic vibrators of various structures are known, but as a typical structure, a pair of metal blocks and a polarized structure fixed between these metal blocks are known. A Langevin-type ultrasonic vibrator composed of processed piezoelectric elements. Among them, a bolted Langevin type ultrasonic vibrator with a structure in which a polarized piezoelectric element is connected with a bolt between a pair of metal blocks and tightened an...
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IPC IPC(8): B06B1/06
CPCB06B1/06B06B3/00B06B1/0238B06B2201/71B06B1/0618B06B2201/70B06B2201/72B06B2201/73B24B47/00B26D7/00B08B7/028B23C5/06
Inventor 大西一正
Owner UWAVE