An ultrasonic vibration adding tool including a ring-shaped balance weight having a threaded part, at the top of an inner circumferential surface, which the threaded part of a cylindrical housing is screwed into. The ultrasonic vibration adding tool has such a structure that, below the threaded part of this ring-shaped balance weight is formed a lower small diameter part the inner diameter of which is smaller than the inner diameter of the threaded part, and a space is formed between the inner circumferential surface of the lower small diameter part and the side face of a columnar front mass, the radius (Hin) of a circle formed by the inner circumferential surface of cylindrical part of the cylindrical housing being larger than the radius (Nin) of a circle formed by the inner circumferential surface of the lower small diameter part of the ring-shaped balance weight, a difference in radius (HN), i.e., Hin-Nin, being 0.01-fold to 1-fold of the radius (Fr) of the columnar front mass at a position in contact with the lower surface of a disc-shaped bulge part (flange).
[Problem] To provide an ultrasonic cutting device with which ultrasonic energy produced by applying electric energy to a piezoelectric element attached to a disc-shaped cutting tool is propagated at high efficiency to a blade edge of the cutting tool. [Solution] An ultrasonic cutting device includes: a disc-shaped cutting tool that is mounted onto a spindle and provided with annular flanges attached so as to protrude out in the vertical direction from both a front-side surface and a reverse-side surface, and provided with an annular piezoelectric element attached so as to be concentric with the flanges; and a support body structured to contact distal end parts of the flanges and to support the disc-shaped cutting tool with pressure directed toward the two surfaces of the disc-shaped cutting tool.
B23C 5/26 - Securing milling-cutters to the driving spindle
H01L 21/301 - Treatment of semiconductor bodies using processes or apparatus not provided for in groups to subdivide a semiconductor body into separate parts, e.g. making partitions
B23B 1/00 - Methods for turning or working essentially requiring the use of turning-machinesUse of auxiliary equipment in connection with such methods
[Problem] To provide an ultrasonic vibration application tool comprising a Langevin ultrasonic transducer that is incorporated into an ultrasonic machining device and is suitable for generating circular traveling waves. [Solution] An ultrasonic vibration application tool including: a cylindrical housing having a downwardly widening contact surface on the lower part of the inner peripheral surface, and provided with a threaded surface on the lower part of the outer peripheral surface; a Langevin ultrasonic transducer configured such that a polarization-treated piezoelectric element is bolted in a sandwiched state between a front mass, the upper part which is provided with a flange part having a contact surface fitted together with the contact surface of the housing, and a rear mass disposed above the front mass; and a ring-shaped counter weight, the upper part of the inner peripheral surface of which is provided with a threaded surface into which the threaded surface in the lower part of the outer peripheral surface of the housing is threaded, and the lower part of which has an inner-peripheral extended part that comes into contact with the lower surface of the flange part and does not come into contact with the side surface of the front mass; vertical vibration of the front mass and flexural vibration in the center part of a flat surface of the flange part, which projects out in the same direction as said vertical vibration, being generated by the application of electric energy to the piezoelectric element, and arcuate vibration in a direction opposite to the direction of projection by said flexural vibration in the center part of the flat surface of the flange part being simultaneously generated in the outer peripheral surface of the ring-shaped counterweight by said energy application as well.
B06B 1/06 - Processes or apparatus for generating mechanical vibrations of infrasonic, sonic or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
B23B 1/00 - Methods for turning or working essentially requiring the use of turning-machinesUse of auxiliary equipment in connection with such methods
B24B 1/04 - Processes of grinding or polishingUse of auxiliary equipment in connection with such processes subjecting the grinding or polishing tools, the abrading or polishing medium or work to vibration, e.g. grinding with ultrasonic frequency
H01L 41/053 - Mounts, supports, enclosures or casings
H01L 41/09 - Piezo-electric or electrostrictive elements with electrical input and mechanical output
H02N 2/16 - Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing rotary motion, e.g. rotary motors using travelling waves
B26D 7/08 - Means for treating work or cutting member to facilitate cutting
4.
Ultrasonic vibration application tool and ultrasonic processing device
An ultrasonic vibration application tool equipped with a Langevin type ultrasonic vibrator which is suitably employable for ultrasonic processing devices and which efficiently generates ultrasonic vibration includes: a cylindrical housing having a contact face on a lower or bottom part of an inner surface thereof, and a lower screw part of an outer surface thereof; a bolted Langevin type ultrasonic vibrator comprising a front mass, a rear mass and a polarized piezoelectric element arranged between both masses, in which the front mass comprises a cylindrical tool-holder and a disc-shaped bulging part provided with a contact face for fitting to the contact face of the housing; and a ring-shaped counterweight having an upper screw part on an inner peripheral surface which is screwed with the screw part of the housing.
B06B 1/06 - Processes or apparatus for generating mechanical vibrations of infrasonic, sonic or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
B23B 1/00 - Methods for turning or working essentially requiring the use of turning-machinesUse of auxiliary equipment in connection with such methods
B23B 37/00 - Boring by making use of vibrations of ultrasonic frequency
B24B 1/04 - Processes of grinding or polishingUse of auxiliary equipment in connection with such processes subjecting the grinding or polishing tools, the abrading or polishing medium or work to vibration, e.g. grinding with ultrasonic frequency
H02N 2/10 - Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing rotary motion, e.g. rotary motors
5.
ULTRASONIC VIBRATION APPLICATION TOOL AND ULTRASONIC PROCESSING DEVICE
[Problem] To provide an ultrasonic vibration application tool which is suitable for incorporating into an ultrasonic processing device and which is provided with a Langevin type ultrasonic vibrator, wherein highly-efficient use of the ultrasonic vibrations generated by the Langevin type ultrasonic vibrator is possible. [Solution] An ultrasonic vibration application tool includes: a cylindrical housing having a contact surface on an inner peripheral surface lower part or a bottom part, and a screw part on an outer peripheral surface lower part; a bolt-clamped Langevin type ultrasonic vibrator in which a polarization-treated piezoelectric element is interposed between a front mass containing a cylindrical-tool mounting tool which includes on an upper part thereof a disk-shaped bulging part provided with a contact surface that fits with the contact surface of the cylindrical housing, and a rear mass disposed above the front mass; and a ring-shaped counterweight having on an inner peripheral surface upper part thereof a screw part into which the screw part of the cylindrical housing is screwed.
B23B 37/00 - Boring by making use of vibrations of ultrasonic frequency
B06B 1/06 - Processes or apparatus for generating mechanical vibrations of infrasonic, sonic or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
B23B 1/00 - Methods for turning or working essentially requiring the use of turning-machinesUse of auxiliary equipment in connection with such methods
B24B 1/04 - Processes of grinding or polishingUse of auxiliary equipment in connection with such processes subjecting the grinding or polishing tools, the abrading or polishing medium or work to vibration, e.g. grinding with ultrasonic frequency
6.
METHOD FOR EXCITING LONGITUDINAL/TORSIONAL VIBRATION OF LANGEVIN-TYPE ULTRASONIC VIBRATOR
[Problem] To provide a method for exciting an ultrasonic vibration excited by a Langevin-type ultrasonic transducer, wherein the ultrasonic vibration is a longitudinal/torsional composite ultrasonic vibration of a novel vibration mode. [Solution] A method for: preparing a metal block, a metal block provided with a support frame body projecting in an annular shape on a side surface, and a Langevin-type ultrasonic transducer including a disc-shaped piezoelectric element which has been polarized-processed in the vertical direction and a disc-shaped piezoelectric element polarized in the circumferential direction, the Langevin-type ultrasonic transducer being fixed between the metal blocks; connecting the Langevin-type ultrasonic transducer to a base via the support frame body to support the Langevin-type ultrasonic transducer in a restrained state; thereafter applying, to both the disc-shaped piezoelectric element which has been polarization-processed in the vertical direction and the disc-shaped piezoelectric element polarized in the circumferential direction of the ultrasonic transducer, a voltage having a frequency capable of exciting a longitudinal vibration, which comprises a reciprocating vibration having no vibration nodes inside the ultrasonic transducer, and a torsional primary vibration having one vibration node inside the ultrasonic transducer; and thereby exciting, in the Langevin-type ultrasonic transducer, a longitudinal/torsional ultrasonic vibration which is a composite vibration of a torsional primary vibration and an ultrasonic vibration comprising a longitudinal reciprocating vibration having no vibration nodes inside the ultrasonic transducer.
[Problem] 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. [Solution] 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.
B06B 1/06 - Processes or apparatus for generating mechanical vibrations of infrasonic, sonic or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
A grinding tool comprises: a support plate (11), an annular grindstone mounting plate (14) which is supported under the support plate by means of an annular connection section (12) so as to be parallel to the support plate with a gap formed therebetween and which has an annular grindstone (13) mounted to the lower surface thereof; and an ultrasonic vibrator which is affixed to the grindstone mounting plate. The inner peripheral edge of the upper annular connection surface (12a) of the annular connection section (12) is located on the outer peripheral side of the outer peripheral edge of the lower annular connection surface (12b) of the annular connection section (12). An annular air phase containing region (18), which is formed by multiply forming annular air phase containing band regions (16, 17) in the radial direction of the connection section (12), is provided between the inner peripheral edge of the upper annular connection surface (12a) of the annular connection section (12) and the outer peripheral edge of the lower annular connection surface (12b) of the annular connection section (12). The annular air phase containing region (18) is provided so as to prevent the ultrasonic vibration generated by the ultrasonic vibrator from being transmitted in the direction parallel to the grindstone mounting surface to the region on the outer peripheral side of the annular air phase containing region (18) of the connection section (12). In the grinding tool, the ultrasonic vibration generated by the ultrasonic vibrator can be efficiently applied to the grindstone.
B24B 1/04 - Processes of grinding or polishingUse of auxiliary equipment in connection with such processes subjecting the grinding or polishing tools, the abrading or polishing medium or work to vibration, e.g. grinding with ultrasonic frequency
Provided is a cutting or grinding apparatus (10) comprising a cylindrical housing (11), a spindle (13) supported rotatably in the cylindrical housing through a bearing (12), a tool holder (14) mounted in the bottom of the spindle, and a cutting or grinding rod-shaped tool (15) held and fixed in the bottom portion of the tool holder. An ultrasonic oscillator (16) is mounted on the tool holder. Between the portion mounting the ultrasonic oscillator and the portion mounting the tool holder on the spindle, there is formed an ultrasonic oscillation transmission blocking region (22), in which annular air-phase containing bands (22a and 22b) arranged in an annular shape and containing discontinuous air phases are arranged multiplexly. The ultrasonic oscillations generated in the ultrasonic oscillator and propagated linearly to the spindle are blocked by the ultrasonic oscillation transmission blocking region. As a result, the bearing supporting the spindle is hardly troubled, and the general-purpose rod-shaped tool can be used, so that the cutting or grinding apparatus is excellent in practicability.
B23Q 3/12 - Devices holding, supporting, or positioning, work or tools, of a kind normally removable from the machine for securing to a spindle in general
B06B 1/02 - Processes or apparatus for generating mechanical vibrations of infrasonic, sonic or ultrasonic frequency making use of electrical energy
B23B 37/00 - Boring by making use of vibrations of ultrasonic frequency
B24B 1/04 - Processes of grinding or polishingUse of auxiliary equipment in connection with such processes subjecting the grinding or polishing tools, the abrading or polishing medium or work to vibration, e.g. grinding with ultrasonic frequency
patents
