CN108568398B - Giant magnetostrictive ultrasonic transducer - Google Patents
Giant magnetostrictive ultrasonic transducer Download PDFInfo
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- CN108568398B CN108568398B CN201810287824.XA CN201810287824A CN108568398B CN 108568398 B CN108568398 B CN 108568398B CN 201810287824 A CN201810287824 A CN 201810287824A CN 108568398 B CN108568398 B CN 108568398B
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- magnetic conduction
- giant magnetostrictive
- transducer
- magnetostrictive rod
- amplitude transformer
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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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- 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
- B06B2201/00—Indexing scheme associated with B06B1/0207 for details covered by B06B1/0207 but not provided for in any of its subgroups
- B06B2201/50—Application to a particular transducer type
- B06B2201/58—Magnetostrictive transducer
Abstract
The invention discloses a giant magnetostrictive ultrasonic transducer which comprises a rear cover plate, a magnetic conduction block, a permanent magnet, a giant magnetostrictive rod and an amplitude transformer, wherein the components are connected by bolts, and pretightening force is provided by the bolts. The magnetic conduction sleeve, the magnetic conduction sheet and the amplitude transformer are fixed with the handle through screws, holes are formed in the middle of the bolt and the amplitude transformer, grooves are formed in the magnetic conduction sheet, certain gaps are formed between the rear cover plate and the magnetic conduction sleeve and between the giant magnetostrictive rod and the coil, and when the transducer is cooled through cooling liquid, a hose is arranged between the bolt and a center hole of the handle and connected with the bolt. The invention can adopt cooling gas or cooling liquid to cool the transducer, and can also arrange a cooling water pipe or a cooling water jacket between the coil and the giant magnetostrictive rod to cool the transducer, thereby realizing the high-speed rotation of the transducer, effectively solving the heating problem of the transducer, controlling the temperature fluctuation of the transducer in a very small range and leading the transducer to be capable of working stably.
Description
Technical Field
The invention belongs to the technical field of ultrasonic processing equipment, and particularly relates to a giant magnetostrictive ultrasonic transducer.
Background
At present, in the technical field of ultrasonic processing, piezoelectric ceramics are excitation materials widely applied to ultrasonic transducers, but because the power density of the piezoelectric ceramics is relatively low, and the piezoelectric ceramics have the defects of overheating failure, fragility and the like, the application of the piezoelectric ceramics in high-power occasions is limited.
The giant magnetostrictive material is a novel functional material and has a large magnetostrictive coefficient; the power capacity is high; the response speed is high; the performance is relatively stable; large electromechanical coupling coefficient, etc. The ultrasonic vibration with high power and large amplitude is realized. Due to the existence of hysteresis effect and eddy current effect in the giant magnetostrictive material and the high frequency operation of the excitation coil, a large amount of heat is generated, which seriously affects the performance of the giant magnetostrictive transducer. Therefore, when the giant magnetostrictive transducer is operated, the transducer must be cooled so that the transducer can be operated stably.
Disclosure of Invention
The invention aims to provide a giant magnetostrictive ultrasonic transducer which is cooled by using cold air and cooling liquid and solves the heating problem of the giant magnetostrictive transducer.
The technical scheme adopted by the invention is that the giant magnetostrictive ultrasonic transducer comprises a knife handle, wherein a central through hole is formed in the axial direction of the knife handle, a secondary winding is sleeved on the knife handle, a primary winding is arranged on the knife handle at a position opposite to the secondary winding, and the secondary winding is in inductive coupling connection with the primary winding;
the lower part of the knife handle is provided with an accommodating cavity, a magnetic conduction sleeve is arranged in the accommodating cavity, the lower end of the magnetic conduction sleeve is provided with a magnetic conduction sheet, the lower end of the magnetic conduction sheet is provided with an amplitude transformer, and the magnetic conduction sleeve, the magnetic conduction sheet and the amplitude transformer are fixed on the knife handle through screws;
the coil is sleeved outside the giant magnetostrictive rod and is connected with the secondary winding through a lead; a central through hole is axially arranged along the giant magnetostrictive rod, the joint cutting is processed along the radial direction, and insulating glue is filled at the joint cutting position;
the upper end and the lower end of the giant magnetostrictive rod are respectively provided with a permanent magnet and a magnetic conduction block from near to far along the center of the giant magnetostrictive rod, the upper end of the upper magnetic conduction block is connected with a rear cover plate, the magnetic conduction sheet is sleeved outside the magnetic conduction block close to the lower end of the giant magnetostrictive rod, and a groove is formed in the magnetic conduction sheet;
the back cover plate, the magnetic conduction block and the permanent magnet are all provided with through holes corresponding to the giant magnetostrictive rod, the through holes in the three parts of the back cover plate, the magnetic conduction block and the permanent magnet are connected with a connecting piece in a penetrating way with a central through hole of the giant magnetostrictive rod, the lower end of the connecting piece is connected with the amplitude transformer, the connecting piece is made of non-magnetic materials, and the back cover plate, the magnetic conduction block, the permanent magnet, the giant magnetostrictive rod and the amplitude transformer are bonded through a binder.
The invention is also characterized in that:
the connecting piece is a bolt, through holes are formed in the bolt and the amplitude transformer, the through hole of the bolt is communicated with the through hole of the amplitude transformer, a connecting pipe is arranged between the bolt and the central through hole of the handle and communicated with the central through hole of the handle, and the connecting pipe is used for cooling the transducer by adopting cooling liquid.
And a cooling water pipe is arranged between the coil and the giant magnetostrictive rod.
And a cooling water jacket is arranged between the coil and the giant magnetostrictive rod.
The lower end of the amplitude transformer is connected with the tool head through an elastic chuck.
The invention has the beneficial effects that: can effectively solve the problem that the giant magnetostrictive transducer generates heat in actual processing
Drawings
FIG. 1 is a schematic structural view of a giant magnetostrictive ultrasonic transducer of the present invention;
FIG. 2 is a front view of the magnetic conductive plate of the giant magnetostrictive ultrasonic transducer of the present invention;
FIG. 3 is a left side view of the magnetic conductive plate of the giant magnetostrictive ultrasonic transducer of the present invention;
in the figure, 1, a knife handle, 2, a primary winding, 3, a secondary winding, 4, a set screw, 5, a connecting pipe, 6, a rear cover plate, 7, a permanent magnet, 8, a magnetic conduction sleeve, 9, a giant magnetostrictive rod, 10, a magnetic conduction sheet, 11, an amplitude transformer, 12, a nut, 13, a lead, 14, a bolt, 15, a coil, 16, a screw, 17, a magnetic conduction block, 18, an elastic chuck and 19, and a tool head.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The giant magnetostrictive ultrasonic transducer of the invention, as shown in fig. 1, is a giant magnetostrictive ultrasonic transducer,
the ultrasonic cutting tool comprises a tool handle 1, wherein a central through hole is formed in the axial direction of the tool handle 1, a secondary winding 3 is fixed on the tool handle 1 through a set screw 4, a primary winding 2 is arranged on the tool handle 1 at a position opposite to the secondary winding 3, the primary winding 2 is fixed on a machine tool, the primary winding 2 is connected with an ultrasonic generator through a lead, and the secondary winding 3 is connected with the primary winding 2 through inductive coupling so as to facilitate the transmission of electric energy;
the lower part of the knife handle 1 is provided with an accommodating cavity, a n-shaped magnetic conduction sleeve 8 is arranged in the accommodating cavity, the lower end of the magnetic conduction sleeve 8 is provided with magnetic conduction sheets 10, the magnetic conduction sheets 10 are uniformly provided with 4 grooves along the radial direction and used as air outlet holes of cooling air of the transducer, and the specific shapes of the magnetic conduction sheets are seen in a front view and a left view, namely fig. 2 and 3. The lower end of the magnetic conductive sheet 10 is provided with an amplitude transformer 11, the amplitude transformer 11 is connected with a tool head 19 through an elastic chuck 18, a flange is arranged on the magnetic conductive sleeve 8, and the knife handle 1, the magnetic conductive sleeve 8, the magnetic conductive sheet 10 and the amplitude transformer 11 are fixed through a screw 16.
The coil 15 is arranged in the magnetic conduction sleeve 8, the giant magnetostrictive rod 9 is arranged in the middle of the coil 15, the coil 15 is connected with the secondary winding 3 through the lead 13, and gaps are formed among the coil 15, the giant magnetostrictive rod 9, the magnetic conduction sheet 10 and the permanent magnet 7, so that cooling gas can pass through the gaps conveniently, and the transducer can be cooled. The giant magnetostrictive rod 9 is axially provided with a central through hole, the joint cutting is processed in the radial direction, and insulating glue is filled at the joint cutting position, so that the eddy current can be reduced; the upper end and the lower end of the giant magnetostrictive rod 9 are respectively provided with a permanent magnet 7 and a magnetic conduction block 17 from near to far, the permanent magnet 7 provides a bias magnetic field for the giant magnetostrictive rod 9 to eliminate the frequency doubling effect, and the upper end of the magnetic conduction block 17 close to the upper end of the giant magnetostrictive rod 9 is connected with the rear cover plate 6. The magnetic conduction piece 10 is sleeved outside the magnetic conduction block 17 close to the lower end of the giant magnetostrictive rod 9. The rear cover plate 6, the permanent magnet 7 and the magnetic conduction block 17 are all positioned in the accommodating cavity.
A gap is arranged between the rear cover plate 6 and the magnetic conduction sleeve 8, so that cooling gas can pass through the gap conveniently.
Through holes corresponding to the giant magnetostrictive rod 9 are formed in the rear cover plate 6, the magnetic conduction block 17 and the permanent magnet 7, a bolt 14 penetrates through the through holes in the three components of the rear cover plate 6, the magnetic conduction block 17 and the permanent magnet 7 and the central through hole of the giant magnetostrictive rod 9, the lower end of the bolt 14 is connected with the amplitude transformer 11, the bolt 14 is made of a non-magnetic conduction material, and the rear cover plate 6, the magnetic conduction block 17, the permanent magnet 7, the giant magnetostrictive rod 9 and the amplitude transformer 11 are bonded through epoxy resin. A gap is arranged between the magnetic conduction block 17 close to the upper end of the ultra-magnetostrictive rod 9 and the magnetic conduction sleeve 8, so that cooling gas can pass through the gap conveniently.
The bolt 14 and the amplitude transformer 11 are respectively provided with a through hole, the through holes of the bolt 14 are communicated with the through holes of the amplitude transformer 11, when cooling liquid is adopted for cooling, a connecting pipe 5 is arranged between the bolt 14 and the central through hole of the tool holder 1, the connecting pipe 5 adopts a hose, and the ultrasonic vibration of the transducer is not influenced when the cooling liquid flows into the bolt central hole from the tool holder central hole. A cooling water pipe or a cooling water jacket can be arranged between the coil 15 and the giant magnetostrictive rod 9 to cool the transducer.
The lower end of the amplitude transformer 11 is connected with a tool head 19 through an elastic chuck 18, the amplitude transformer 11 and the tool head 19 are fastened through a nut 12, and a gap communicated with a through hole of the amplitude transformer 11 is formed in the elastic chuck 18, so that the coolant can flow out.
The giant magnetostrictive transducer has two cooling schemes.
The utility model provides a scheme is, when using air conditioning to cool off the transducer, cooling gas passes through the clearance between 1 centre bore of handle of a knife, handle of a knife 1 and the back shroud 6 in proper order, and the clearance between back shroud 6 and the magnetic conduction sleeve 8 gets into the clearance between giant magnetostrictive rod 9 and the coil 15, flows out from the recess on the magnetic conduction piece 10 at last, realizes the cooling to the transducer.
The other scheme is that when cooling liquid is used for cooling the transducer, the connecting pipe 5 is arranged between the bolt 14 and the central hole of the cutter handle 1, so that the ultrasonic vibration of the transducer is not influenced while the cooling liquid flows into the central hole of the bolt 14 from the central hole of the cutter handle 1. The cooling liquid flows out from the clearance of the elastic chuck 18 through the center hole of the tool holder 1, the connecting pipe 5, the center hole of the bolt 14 and the center hole of the amplitude transformer 11 in sequence. Cooling of the transducer and the tool is achieved. The invention can also arrange a cooling water pipe or a cooling water jacket between the coil 15 and the giant magnetostrictive rod 9 to cool the transducer.
The giant magnetostrictive ultrasonic transducer has the beneficial effects that the problem that the giant magnetostrictive transducer heats in actual processing can be effectively solved while the transducer rotates at a high speed. The temperature of the transducer is controlled within a small range, so that the transducer can stably work.
Claims (3)
1. The giant magnetostrictive ultrasonic transducer is characterized by comprising a knife handle (1), wherein a central through hole is axially arranged along the knife handle (1), a secondary winding (3) is sleeved on the knife handle (1), a primary winding (2) is arranged on the knife handle (1) at a position opposite to the secondary winding (3), and the secondary winding (3) is in inductive coupling connection with the primary winding (2);
the lower part of the knife handle (1) is provided with an accommodating cavity, a magnetic conduction sleeve (8) is arranged in the accommodating cavity, a magnetic conduction sheet (10) is arranged at the lower end of the magnetic conduction sleeve (8), an amplitude transformer (11) is arranged at the lower end of the magnetic conduction sheet (10), and the magnetic conduction sleeve (8), the magnetic conduction sheet (10) and the amplitude transformer (11) are fixed on the knife handle (1) through screws (16);
a coil (15) is arranged in the magnetic conduction sleeve (8), and the coil (15) is sleeved outside the giant magnetostrictive rod (9) and is connected with the secondary winding (3) through a lead (13); a central through hole is axially arranged along the giant magnetostrictive rod (9), the joint cutting is carried out along the radial direction, and insulating glue is filled at the joint cutting position;
the upper end and the lower end of the giant magnetostrictive rod (9) are respectively provided with a permanent magnet (7) and a magnetic conduction block (17) from near to far along the center, the upper end of the upper magnetic conduction block (17) is connected with a rear cover plate (6), a magnetic conduction sheet (10) is sleeved outside the magnetic conduction block (17) close to the lower end of the giant magnetostrictive rod (9), and a groove is formed in the magnetic conduction sheet (10);
the rear cover plate (6), the magnetic conduction block (17) and the permanent magnet (7) are respectively provided with a through hole corresponding to the giant magnetostrictive rod (9), the through holes in the three components of the rear cover plate (6), the magnetic conduction block (17) and the permanent magnet (7) are connected with a connecting piece in a penetrating way with the central through hole of the giant magnetostrictive rod (9), the lower end of the connecting piece is connected with the amplitude transformer (11), the connecting piece is made of a non-magnetic material, and the rear cover plate (6), the magnetic conduction block (17), the permanent magnet (7), the giant magnetostrictive rod (9) and the amplitude transformer (11) are bonded through a bonding agent;
the connecting piece is a bolt (14), through holes are formed in the bolt (14) and the amplitude transformer (11), the through hole of the bolt (14) is communicated with the through hole of the amplitude transformer (11), a connecting pipe (5) is arranged between the bolt (14) and the central through hole of the cutter handle (1) and communicated with the through hole, and the connecting pipe (5) is used for cooling the transducer by adopting cooling liquid;
the lower end of the amplitude transformer (11) is connected with a tool head (19) through an elastic chuck (18).
2. Giant magnetostrictive ultrasonic transducer according to claim 1, characterized in that a cooling water pipe is arranged between the coil (15) and the giant magnetostrictive rod (9).
3. A giant magnetostrictive ultrasonic transducer according to claim 1, characterized in that a cooling water jacket is arranged between the coil (15) and the giant magnetostrictive rod (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810287824.XA CN108568398B (en) | 2018-03-30 | 2018-03-30 | Giant magnetostrictive ultrasonic transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810287824.XA CN108568398B (en) | 2018-03-30 | 2018-03-30 | Giant magnetostrictive ultrasonic transducer |
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| Publication Number | Publication Date |
|---|---|
| CN108568398A CN108568398A (en) | 2018-09-25 |
| CN108568398B true CN108568398B (en) | 2020-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810287824.XA Active CN108568398B (en) | 2018-03-30 | 2018-03-30 | Giant magnetostrictive ultrasonic transducer |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110449335B (en) * | 2019-08-16 | 2021-08-06 | 西安理工大学 | Double-rod type giant magnetostrictive transducer and double-rod type giant magnetostrictive spindle |
| CN110841893B (en) * | 2019-11-25 | 2020-08-14 | 清华大学 | Method and device for pre-tightening giant magnetostrictive material transducer |
| CN111185357A (en) * | 2020-01-06 | 2020-05-22 | 清华大学 | Rotary giant magnetostrictive ultrasonic transducer with single circuit |
| CN111701832A (en) * | 2020-06-22 | 2020-09-25 | 陕西师范大学 | Giant magnetostrictive rod-shaped elliptical composite vibration transducer and transduction method |
| CN112170151B (en) * | 2020-09-15 | 2021-09-07 | 清华大学 | Giant magnetostrictive ultrasonic transducer, single-excitation giant magnetostrictive ultrasonic elliptical vibration tool shank and ultrasonic machining system |
| CN113102209B (en) * | 2021-04-20 | 2021-11-23 | 清华大学 | Giant magnetostrictive transducer and temperature control method thereof |
| CN114733741B (en) * | 2022-04-27 | 2023-07-14 | 西安理工大学 | Double-rod-shaped water-cooling giant magnetostrictive ultrasonic vibration device |
| CN115138549A (en) * | 2022-07-25 | 2022-10-04 | 西安理工大学 | Giant magnetostrictive ultrasonic longitudinal-torsional vibration knife handle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1250995A (en) * | 1968-06-11 | 1971-10-27 | ||
| CN103071614A (en) * | 2013-01-15 | 2013-05-01 | 清华大学 | Separated super-magnetostrictive telescopic rotary ultrasonic vibration head |
| CN103586192A (en) * | 2013-11-08 | 2014-02-19 | 华中科技大学 | Double-stimulation ultrasonic elliptical vibration processing device |
| CN105397920A (en) * | 2015-10-21 | 2016-03-16 | 清华大学 | Giant magnetostrictive rotary ultrasonic vibration knife handle |
-
2018
- 2018-03-30 CN CN201810287824.XA patent/CN108568398B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1250995A (en) * | 1968-06-11 | 1971-10-27 | ||
| CN103071614A (en) * | 2013-01-15 | 2013-05-01 | 清华大学 | Separated super-magnetostrictive telescopic rotary ultrasonic vibration head |
| CN103586192A (en) * | 2013-11-08 | 2014-02-19 | 华中科技大学 | Double-stimulation ultrasonic elliptical vibration processing device |
| CN105397920A (en) * | 2015-10-21 | 2016-03-16 | 清华大学 | Giant magnetostrictive rotary ultrasonic vibration knife handle |
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| CN108568398A (en) | 2018-09-25 |
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