CN105397920B - Ultra-magnetic telescopic rotary ultrasonic vibrating knife handle - Google Patents
Ultra-magnetic telescopic rotary ultrasonic vibrating knife handle Download PDFInfo
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- CN105397920B CN105397920B CN201510688337.0A CN201510688337A CN105397920B CN 105397920 B CN105397920 B CN 105397920B CN 201510688337 A CN201510688337 A CN 201510688337A CN 105397920 B CN105397920 B CN 105397920B
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- 238000003825 pressing Methods 0.000 claims description 37
- 230000005540 biological transmission Effects 0.000 claims description 14
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- 238000007789 sealing Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 abstract description 22
- 238000005520 cutting process Methods 0.000 abstract description 5
- 238000003754 machining Methods 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 238000012545 processing Methods 0.000 description 15
- 239000000306 component Substances 0.000 description 9
- 239000003822 epoxy resin Substances 0.000 description 5
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- 238000013461 design Methods 0.000 description 3
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- 238000007906 compression Methods 0.000 description 2
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 230000026683 transduction Effects 0.000 description 2
- 238000010361 transduction Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
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- 238000007796 conventional method Methods 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/08—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with magnetostriction
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Abstract
The present invention relates to a kind of ultra-magnetic telescopic rotary ultrasonic vibrating knife handle, belong to ultrasonic nontraditional precision machining technical field, this handle of a knife includes horn, ultra-magnetic telescopic ultrasonic transducer, hollow handle of a knife, secondary part, former limit part, screw thread briquetting；Wherein, ultra-magnetic telescopic ultrasonic transducer is connected by screw rod with horn, is arranged in handle of a knife lower cavity；Ultra-magnetic telescopic ultrasonic transducer and horn connect the ultrasonic vibrator forming and handle of a knife contact internal walls, and ultra-magnetic telescopic ultrasonic transducer lower end is passed through screw thread briquetting and compressed with handle of a knife, and screw thread briquetting and handle of a knife are threaded connection；Horn lower end is compressed by screw thread briquetting, and screw thread briquetting is connected with handle of a knife；Secondary lower is fixed with handle of a knife by screw, and former limit part is fixed on machine tool chief axis end face.The present invention efficiently solves transducer heating problem using the giant magnetostrictive material of piece cutting structure and air cooling system.This handle of a knife can improve working (machining) efficiency.And it is applied to arbitrary handle of a knife connection standard.
Description
Technical Field
The invention belongs to the technical field of ultrasonic precision special machining, and particularly relates to a rotary ultrasonic vibration knife handle based on a Giant Magnetostrictive Material (GMM).
Background
In the high-speed cutting processing of hard and brittle materials, the tool head rotates at a high speed and is added with ultrasonic frequency mechanical vibration, so that the cutting force can be reduced, the processing quality is improved, and the service life of a cutter is prolonged. Relevant studies have shown that: in a certain range, the ultrasonic power is improved, the ultrasonic amplitude is increased, the cutting force can be further reduced, and the machining efficiency is improved. Therefore, the design of high power rotary ultrasonic processing systems has become a trend of development of ultrasonic equipment.
The ultrasonic knife handle is a core component in a rotary ultrasonic processing system, and the currently commonly used ultrasonic transduction materials are piezoelectric ceramics and giant magnetostrictive materials. In the existing ultrasonic processing system, piezoelectric ceramics are used as energy conversion materials in the ultrasonic knife handle, and the application of ultrasonic vibration in high-speed rotation processing is realized.
The rare earth giant magnetostrictive material has the advantages of high magnetostrictive coefficient, high output power, high energy density, high response speed and the like, is favorable for realizing high-power and large-amplitude ultrasonic vibration, and gradually becomes a research hotspot in the field of ultrasonic transduction materials. However, the application in industrial production is not realized so far, and the main problems of the application of the giant magnetostrictive material in the rotary ultrasonic processing are as follows:
1. in a high-frequency alternating electromagnetic field, energy dissipation such as eddy current loss, magnetic hysteresis loss, mechanical loss and the like causes obvious temperature rise of the giant magnetostrictive ultrasonic transducer, and the stability of output amplitude and the safety of long-time work are seriously influenced.
2. In the rotary ultrasonic processing, the giant magnetostrictive ultrasonic transducer needs to rotate at a high speed and output large-amplitude mechanical vibration, so that the high-speed rotation of the giant magnetostrictive ultrasonic transducer and the energy transmission in the rotation process are technical difficulties of the application of the giant magnetostrictive material in the rotary ultrasonic processing.
Disclosure of Invention
The invention aims to solve the main problem of application of a giant magnetostrictive material in rotary ultrasonic machining, and designs a giant magnetostrictive rotary ultrasonic vibration knife handle, which effectively solves the heating problem of a transducer from two angles of reducing heating and actively dissipating heat by utilizing a giant magnetostrictive material with a slice structure and an air cooling system; the high-speed rotation of the transducer is realized by adopting a mode of integrated design of the giant magnetostrictive transducer and the handle, and the non-contact energy transmission is realized by adopting an electromagnetic induction mode.
The invention provides a giant magnetostrictive rotary ultrasonic vibration knife handle which is characterized in that the structure of the knife handle is suitable for an air cooling system to cool, and the knife handle comprises an amplitude transformer, a giant magnetostrictive ultrasonic transducer, a hollow knife handle provided with a central hole and an air hole, a non-contact electric energy transmission system consisting of a secondary side part and a primary side part, and a threaded pressing block; the ultrasonic transducer is connected with the amplitude transformer through a screw rod to form an integral ultrasonic vibrator which is arranged in a cavity at the lower part of the hollow tool handle; the ultrasonic vibrator formed by connecting the giant magnetostrictive ultrasonic transducer and the amplitude transformer is contacted with the inner wall of the cavity of the tool holder through a key on the shell of the transducer to realize radial and axial positioning, the lower end of the giant magnetostrictive ultrasonic transducer is tightly pressed with the tool holder through a threaded pressing block, and the threaded pressing block is connected with the tool holder through threads; the lower end of the amplitude transformer is tightly pressed through a threaded pressing block, and the threaded pressing block is connected with the cutter handle through threads; the lower end of the secondary side part is fixed with the tool shank through screws uniformly distributed in the circumferential direction, and the primary side part is fixed on the end face of a main shaft of the machine tool through threads. The invention has the characteristics and beneficial effects that:
the invention adopts the giant magnetostrictive material as the ultrasonic transducer material, and can realize the ultrasonic frequency mechanical vibration with high power and large amplitude by utilizing the advantages of the giant magnetostrictive material such as high magnetostrictive coefficient, large output power, high energy density and the like.
The knife handle and the ultrasonic transducer are integrated, and the non-contact electric energy transmission structure is utilized to transmit electric energy from a static part (an ultrasonic generator) to a rotating part (a giant magnetostrictive transducer), so that the high-speed rotation of the ultrasonic transducer is realized, and the application of the giant magnetostrictive material in the rotary ultrasonic processing is realized.
The air cooling system is adopted to cool the ultrasonic transducer of the core part in the ultrasonic knife handle, so that the temperature rise of the giant magnetostrictive ultrasonic transducer is reduced, and the stability of the output amplitude of the system and the safety of long-time work are ensured. The problem that the giant magnetostrictive material generates heat in high-power ultrasonic processing can be effectively solved;
the sectional type giant magnetostrictive rod is adopted, the eddy current loss of the giant magnetostrictive material is reduced by utilizing a slicing structure, the distance between two opposite permanent magnets is reduced by adopting an upper permanent magnet and a lower permanent magnet, and a uniform bias magnetic field is provided for the giant magnetostrictive material;
the pressing block is utilized to apply prestress, so that parts such as a disc spring and the like are reduced, and the structure is compact;
the cutter handle can improve the ultrasonic power and the ultrasonic amplitude within a certain range, further reduce the cutting force and improve the processing efficiency. The tool is suitable for any tool shank connection standard, different processing requirements are met, the giant magnetostrictive rotary ultrasonic vibration tool shank is independent of a machine tool, the machine tool does not need to be greatly changed, and the tool is convenient to install and use.
Drawings
FIG. 1 is a schematic structural view of an embodiment of a giant magnetostrictive ultrasonic vibration knife handle of the present invention;
FIG. 2 is a schematic structural diagram of a non-contact power transmission embodiment of the present invention;
FIG. 3 is a schematic diagram of a giant magnetostrictive transducer embodiment of the invention; wherein,
FIG. 3(a) is a cross-sectional view of the structure of an embodiment of a giant magnetostrictive transducer,
FIG. 3(b) is a top view of FIG. 3 (a);
FIG. 4 is a schematic structural diagram of an embodiment of the closed magnetic circuit of the present invention; wherein,
FIG. 4(a) is a cross-sectional view of the structure of an embodiment of a closed magnetic circuit,
FIG. 4(b) is a top view of FIG. 4 (a);
FIG. 5 is a schematic structural view of an embodiment of a segmented giant magnetostrictive rod according to the invention.
Detailed Description
In order to achieve the above object, the present invention provides a giant magnetostrictive rotary ultrasonic vibration knife handle, which is described below with reference to the accompanying drawings and embodiments:
the structure of the embodiment of the giant magnetostrictive rotary ultrasonic vibration knife handle provided by the invention is suitable for cooling by an air cooling system, and comprises an amplitude transformer 10, a giant magnetostrictive ultrasonic transducer 20, a shell 24, a hollow knife handle 30 (provided with a knife handle central hole 31 and an air hole 32 on the knife handle), a non-contact electric energy transmission system consisting of a secondary side part 40 and a primary side part 50, a screw 60, a screw rod 70 and threaded pressing blocks 80 and 90, wherein the amplitude transformer is arranged on the amplitude transformer 10; the connection and matching relation of the components is as follows: the giant magnetostrictive ultrasonic transducer 20 is connected with the amplitude transformer 10 through a screw rod 70 to form an integral ultrasonic vibrator which is arranged in a cavity at the lower part of the hollow tool handle 30; the ultrasonic vibrator formed by connecting the giant magnetostrictive ultrasonic transducer 20 and the amplitude transformer 10 is in contact with the inner wall of the cavity of the tool shank 30 through a key 218 on a shell 24 of the transducer 20 to realize radial and axial positioning, the lower end of the giant magnetostrictive ultrasonic transducer 20 is tightly pressed with the tool shank 30 through a threaded pressing block 80, and the threaded pressing block 80 is in threaded connection with the tool shank 30; in the high-speed rotation process, in order to ensure that the amplitude transformer 10 is tightly connected with the giant magnetostrictive ultrasonic transducer 20, the lower end of the amplitude transformer 10 is tightly pressed through the threaded pressing block 90, and the threaded pressing block 90 is in threaded connection with the cutter handle 30. The lower end of the secondary side part 40 is fixed with the tool shank 30 through 4 screws 60 which are evenly distributed in the circumferential direction, and the primary side part is fixed on the end face of the main shaft of the machine tool through threads.
The implementation and functions of the main components of the embodiment are as follows:
as shown in fig. 2, the non-contact power transmission system composed of the primary component 50 and the secondary component 40 includes a primary coil 53, a primary magnetic core 52, a primary skeleton 51, a secondary coil 43, a secondary magnetic core 42, and a secondary skeleton 41; the primary side framework is a hollow cylinder, the lower end of the primary side framework is provided with an annular groove, the primary side coil 53 is wound in the primary side magnetic core 52, and the magnetic core is fixed in the groove at the lower end of the primary side framework 51 through epoxy resin bonding. The secondary side component 40 has basically the same structure as the primary side component 50, except that the upper end of the secondary side framework is provided with an annular groove, and the lower end of the secondary side framework is provided with a threaded hole for connecting and fixing with the tool handle 30; similarly, the secondary winding 43 is wound around the secondary core 42 and fixed in the slot at the upper end of the secondary frame 41 by epoxy resin bonding. A gap is reserved between the primary side part and the secondary side part, and the size of the gap can be selected within 1-2 mm. The secondary side assembly 40 is secured to the handle by screws 60, and the upper end of the handle is inserted into the primary side member center hole.
Based on the electromagnetic induction principle, electric energy is transmitted from the primary side to the secondary side, and non-contact energy transmission is achieved. And selecting a proper primary side gap and a proper secondary side gap to improve the energy transmission efficiency. The primary magnetic core 52 and the secondary magnetic core 42 are made of ferrite, so that the magnetic permeability is high, the eddy current loss is low, and the energy transfer efficiency is improved.
The structure of the giant magnetostrictive ultrasonic transducer 20, which is an electromechanical energy conversion element, is shown in fig. 3, and includes a pressing block 25 with a central hole 28, a housing 24, a giant magnetostrictive rod 22, a matching circuit board 26, screws (27 and 29), a magnetic conductive ring 212, an upper magnetic conductive sheet 211, a lower magnetic conductive sheet 216, a magnetic conductive sleeve 215, a permanent magnet 214, an excitation coil 23, a coil hollow framework 213, an output cover 21 with an air hole 217, and an O-ring seal 210 nested on the pressing block wall; the connection and matching relation of the components is as follows: an upper magnetic conductive sheet 211, a giant magnetostrictive rod 22, a permanent magnet 214 and a lower magnetic conductive sheet 216 of the giant magnetostrictive ultrasonic transducer 20 form a segmented giant magnetostrictive rod structure, as shown in fig. 4, the upper magnetic conductive sheet 211, the upper permanent magnet sheet 2141, the upper giant magnetostrictive rod 221, the middle permanent magnet sheet 2142, the lower giant magnetostrictive rod 222, the lower permanent magnet sheet 2143 and the lower magnetic conductive sheet 216 are sequentially arranged between a pressing block 25 and an output cover 21 along the axial direction, all the components are bonded into a whole by epoxy resin, the output cover 21 is in threaded connection with a housing 24, the pressing block 25 and the housing 24 are fixed by 5 screws 29 uniformly distributed along the circumference, and the inside is sealed by an O-shaped sealing ring 210; a matching circuit board 26 is fixed above the pressing block 25 by screws 27. The coil framework 213, the excitation coil 23, the magnetic conduction sleeve 215 and the magnetic conduction ring 212 are installed in the shell 24 and are bonded with an inner hole of the shell through epoxy resin for fixing, the excitation coil 23 is wound on the coil framework 213, the magnetic conduction sleeve 215, the magnetic conduction ring 212, the upper magnetic conduction sheet 211 and the lower magnetic conduction sheet 216 form a closed magnetic conduction loop and are wrapped outside the ultra-magnetostrictive rod 22, and the ultra-magnetostrictive rod 22 and the coil framework 213 are in small-gap fit, as shown in fig. 5.
The operation principle of the giant magnetostrictive ultrasonic transducer 20 is as follows: the prestress borne by the giant magnetostrictive rod 22 is changed through the adjusting screw 29 to be in a compression state, the prestress range is 6-12Mpa, the specific size is selected according to the variation range of a driving magnetic field (driving current) in practical application, but the giant magnetostrictive rod 22 is always in a compression stress state in the whole vibration period; the output cover 21 is provided with an air hole 217, the pressing block 25 is provided with a central hole 28, the pressing block 25 is made of non-magnetic steel, the output cover 21 is made of aluminum, and the materials with poor magnetic conductivity are adopted to reduce magnetic leakage; as is apparent from the acoustic impedance characteristics of the different materials, the output cover 21 has a lower acoustic impedance than the press block 25, and therefore, most of the ultrasonic vibration energy is transmitted to the output cover 21. The giant magnetostrictive rod 22 is processed by slicing, and the slices are bonded by epoxy resin to reduce eddy current loss; as shown in fig. 5, the magnetic conductive sleeve 215, the magnetic conductive ring 212, the upper magnetic conductive sheet 211, and the lower magnetic conductive sheet 216 form a closed magnetic conductive loop, and are wrapped outside the super magnetostrictive rod 22, and the super magnetostrictive rod 22 and the coil bobbin 213 are in close clearance fit, so that the coil bobbin 213 does not obstruct the vibration of the super magnetostrictive rod 22, and provides a passage for the flow of cooling air; when high-frequency alternating current is introduced, the excitation coil 23 generates a high-frequency alternating magnetic field, and a closed magnetic circuit is formed along the magnetic conduction sleeve 215, the magnetic conduction ring 212, the upper magnetic conduction sheet 211, the giant magnetostrictive rod 22, the lower magnetic conduction sheet 216 and the magnetic conduction ring 212, so that the magnetic leakage is reduced, and the deformation amount of the giant magnetostrictive rod 22 is improved; the matching circuit 26 is used for compensating the inductive load generated by the primary coil 53, the secondary coil 43 and the excitation coil 23, so that the equivalent circuit of the giant magnetostrictive ultrasonic knife handle is equivalent to a pure resistive load at the mechanical resonance frequency, the reactive power in the circuit is reduced, and the load driving capability of the ultrasonic generator is improved.
The amplitude transformer 10 of the embodiment is designed according to a half-wavelength theory, and amplifies ultrasonic vibration generated by a giant magnetostrictive ultrasonic transducer, so that the output end face of the amplitude transformer 10 is a maximum amplitude point; the amplitude transformer amplifies the ultrasonic amplitude, the amplitude amplification coefficient is determined by the structural form and the area ratio of the front section to the rear section, and the amplitude transformer 10 can be designed into a stepped, exponential, parabolic and other structural forms. The present embodiment employs a stepped structure. The joint surface of the amplitude transformer 10 and the threaded pressing block 90 is designed to be at a node position, and the ultrasonic amplitude is zero, so that the threaded pressing block 90 is prevented from hindering the forward transmission of the ultrasonic vibration.
The knife handle of the embodiment can be a proper standard knife handle (BT, HSK and the like).
The other components of this embodiment can be made using conventional products or by conventional techniques.
The air cooling system associated with this embodiment employs a conventional air compressor.
The ultrasonic generator used in this embodiment is a conventional one.
The working process of gas cooling in the invention is as follows, cooling gas flows into the giant magnetostrictive ultrasonic transducer 20 through the center hole 31 of the knife handle and the center hole 28 of the pressing block, and cools the giant magnetostrictive rod 22 through the gap between the giant magnetostrictive rod 22 and the coil framework 213. The circulated cooling air flows out of the giant magnetostrictive ultrasonic vibration knife handle through the air hole 217 on the output cover and the air hole 32 on the knife handle. An O-shaped sealing ring 210 is adopted to seal the pressing block 25 and the shell 24 so as to prevent cooling air from leaking.
The embodiment of the invention in the rotary ultrasonic processing is as follows:
the shank 30 is connected to the machine spindle by means of a blind rivet. The primary side assembly 50 is fixed on the end face of a main shaft of the machine tool through threaded connection, and two ends of the primary side coil 53 are connected with the ultrasonic generator. The secondary side assembly 40 and the tool shank 30 are fixed through a screw 60, and the secondary side coil 43 is connected with the excitation coil 23 of the giant magnetostrictive ultrasonic transducer 20 through the matching circuit 26. The clearance between the primary side assembly 50 and the secondary side assembly 40 is adjusted to ensure that no interference occurs under the high-speed rotation working condition and the electric energy transmission efficiency reaches the maximum value. The giant magnetostrictive ultrasonic transducer 20 and the amplitude transformer 10 are fixed in the tool shank 30 through the thread pressing blocks (80 and 90), and the thread pressing blocks (80 and 90) adopt an adhesive to prevent loosening of threads. The ultrasonic generator determines the mechanical resonance frequency of the giant magnetostrictive ultrasonic vibration knife handle through frequency sweeping, and outputs alternating current with corresponding frequency. According to the magnitude of the driving magnetic field (driving current), proper prestress is selected, and the adjusting screw 29 enables the giant magnetostrictive rod 22 to be in a better working state; adjusting the output power of an appropriate ultrasonic generator according to the required ultrasonic amplitude; the electric energy output by the ultrasonic generator is transmitted to the excitation coil 23 through the non-contact electric energy transmission structure, and an ultrasonic frequency alternating magnetic field is formed in the closed magnetic conduction loop; under the action of an ultrasonic frequency alternating magnetic field, the giant magnetostrictive rod generates ultrasonic frequency longitudinal mechanical vibration; the horn 10 amplifies the mechanical vibrations generated by the giant magnetostrictive ultrasonic transducer 20. The output end of the amplitude transformer 10 not only does ultrasonic frequency longitudinal vibration with larger amplitude, but also does high-speed rotation motion along with the main shaft, and under the comprehensive action of the two motions, the hard and brittle materials are subjected to rotary ultrasonic processing; an air cooling pipeline of the air compressor penetrates through the center hole 31 of the knife handle and is in threaded connection with the center hole 28 of the pressing block, the air cooling pipeline is connected with the air compressor, and output airflow enters the giant magnetostrictive ultrasonic transducer 20 through the center hole 31 of the knife handle and the hollow hole 28 of the pressing block to cool the giant magnetostrictive rod 22 and the excitation coil 23. And proper cooling air pressure is selected according to the magnitude of the working current, so that the working temperature of the giant magnetostrictive rod 22 is ensured to be below 1/2 Curie temperature.
Claims (2)
1. A giant magnetostrictive rotary ultrasonic vibration knife handle is characterized in that the structure of the knife handle is suitable for an air cooling system to cool, and the knife handle comprises an amplitude transformer, a giant magnetostrictive ultrasonic transducer, a hollow knife handle provided with a central hole and an air hole, a non-contact electric energy transmission system consisting of a secondary side part and a primary side part, and a threaded pressing block; the ultrasonic transducer is connected with the amplitude transformer through a screw rod to form an integral ultrasonic vibrator which is arranged in a cavity at the lower part of the hollow tool handle; the ultrasonic vibrator formed by connecting the giant magnetostrictive ultrasonic transducer and the amplitude transformer is contacted with the inner wall of the cavity of the tool holder through a key on the shell of the transducer to realize radial and axial positioning, the lower end of the giant magnetostrictive ultrasonic transducer is tightly pressed with the tool holder through a threaded pressing block, and the threaded pressing block is connected with the tool holder through threads; the lower end of the amplitude transformer is tightly pressed through a threaded pressing block, and the threaded pressing block is connected with the cutter handle through threads; the lower end of the secondary side part is fixed with the tool shank through screws uniformly distributed in the circumferential direction, and the primary side part is fixed on the end face of a main shaft of the machine tool through threads;
the giant magnetostrictive ultrasonic transducer comprises a pressing block with a central hole, a shell, an upper giant magnetostrictive rod, a lower giant magnetostrictive rod, a matching circuit board, a magnetic conductive ring, an upper magnetic conductive sheet, a lower magnetic conductive sheet, a magnetic conductive sleeve, an upper permanent magnet sheet, a middle permanent magnet sheet, a lower permanent magnet sheet, an excitation coil, a coil hollow framework, an output cover with an air hole and an O-shaped sealing ring embedded on the wall of the pressing block; wherein: the upper magnetic conductive sheet, the giant magnetostrictive rod, the upper, middle and lower permanent magnet sheets and the lower magnetic conductive sheet form a sectional giant magnetostrictive rod structure which is bonded into a whole; the upper magnetic conductive sheet, the upper permanent magnet sheet, the upper giant magnetostrictive rod, the middle permanent magnet sheet, the lower giant magnetostrictive rod, the lower permanent magnet sheet and the lower magnetic conductive sheet are sequentially arranged between the pressing block and the output cover along the axial direction, the output cover is connected with the shell through threads, the pressing block and the shell are fixed through screws uniformly distributed along the circumference, and the inside of the pressing block and the shell are sealed by adopting O-shaped sealing rings; the matching circuit board is fixed above the pressing block through a screw; the coil framework, the excitation coil, the magnetic conduction sleeve and the magnetic conduction ring are arranged in the shell and are fixedly bonded with an inner hole of the shell, the excitation coil is wound on the coil framework, the magnetic conduction sleeve, the magnetic conduction ring, the upper magnetic conduction sheet and the lower magnetic conduction sheet form a closed magnetic conduction loop and are wrapped on the outer side of the ultra-magnetostrictive rod, and the ultra-magnetostrictive rod is in small-gap fit with the coil framework.
2. The giant magnetostrictive rotary ultrasonic vibration knife handle according to claim 1, wherein the non-contact electric energy transmission system comprises a primary coil, a primary magnetic core, a primary skeleton, a secondary coil, a secondary magnetic core and a secondary skeleton; the primary side framework is a hollow cylinder, the lower end of the primary side framework is provided with an annular groove, the primary side coil is wound in the primary side magnetic core, and the primary side magnetic core is fixedly bonded in the groove at the lower end of the primary side framework; the upper end of the secondary side framework is provided with an annular groove, and the lower end of the secondary side framework is provided with a threaded hole for connecting and fixing the secondary side framework with the knife handle; the secondary side coil is wound in the secondary side magnetic core, and the secondary side magnetic core is fixed in the upper end groove of the secondary side framework in an adhesion manner; a gap is reserved between the primary side part and the secondary side part; the secondary side part is fixed on the knife handle through a screw, and the upper end of the knife handle is inserted into the center hole of the primary side part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510688337.0A CN105397920B (en) | 2015-10-21 | 2015-10-21 | Ultra-magnetic telescopic rotary ultrasonic vibrating knife handle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510688337.0A CN105397920B (en) | 2015-10-21 | 2015-10-21 | Ultra-magnetic telescopic rotary ultrasonic vibrating knife handle |
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| CN105397920A CN105397920A (en) | 2016-03-16 |
| CN105397920B true CN105397920B (en) | 2017-03-08 |
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