CN118418309A - High-frequency ultrasonic knife handle suitable for processing hard and brittle materials and use method thereof - Google Patents
High-frequency ultrasonic knife handle suitable for processing hard and brittle materials and use method thereof Download PDFInfo
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- CN118418309A CN118418309A CN202410467008.2A CN202410467008A CN118418309A CN 118418309 A CN118418309 A CN 118418309A CN 202410467008 A CN202410467008 A CN 202410467008A CN 118418309 A CN118418309 A CN 118418309A
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- 238000012545 processing Methods 0.000 title claims abstract description 38
- 239000000463 material Substances 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 6
- 238000002955 isolation Methods 0.000 claims abstract description 8
- 239000000919 ceramic Substances 0.000 claims description 11
- 229910000838 Al alloy Inorganic materials 0.000 claims description 7
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims 2
- 239000011153 ceramic matrix composite Substances 0.000 description 9
- 238000003754 machining Methods 0.000 description 7
- 238000003801 milling Methods 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 4
- 238000000227 grinding Methods 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000003672 processing method Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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- 230000003647 oxidation Effects 0.000 description 1
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- 238000000926 separation method Methods 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
- B28D1/32—Methods and apparatus specially adapted for working materials which can easily be split, e.g. mica, slate, schist
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D7/00—Accessories specially adapted for use with machines or devices of the preceding groups
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- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
The invention discloses a high-frequency ultrasonic knife handle suitable for processing a hard and brittle material and a use method thereof. The high-frequency ultrasonic knife handle comprises a knife handle shell and an ultrasonic vibrator. The ultrasonic vibrator is designed by 2 times of wavelength, and the electrode plate group on the ultrasonic vibrator is connected with the electrode ring groove on the cutter handle shell in a plug-in mode, so that the ultrasonic vibrator is convenient to replace; the ultrasonic vibrator is of an integrated structure of the transducer and the amplitude transformer, the ultrasonic vibrator is connected with the handle shell through the flange plate, the vibration isolation gasket is arranged at the joint, the flange plate on the ultrasonic vibrator is arranged at the joint surface position, energy loss is avoided, the working frequency of the ultrasonic vibrator can reach more than 100 kHz through matching the rear cover plate, the stud, the flange plate and the amplitude transformer, the damage depth of a hard and brittle material during processing is effectively reduced, and the hard and brittle material is processed in a low damage mode.
Description
Technical Field
The invention relates to the technical field of machining, in particular to a high-frequency ultrasonic knife handle suitable for machining of hard and brittle materials.
Background
With the development of aerospace technology, a large number of hard and brittle materials are applied to hot end components of an aeroengine, for example, a ceramic matrix composite has the characteristics of high strength, low density, oxidation resistance, high temperature resistance, anisotropy and the like, so that the ceramic matrix composite can bear the severe service environment of the aeroengine at high temperature and high pressure, but the excellent mechanical and physical properties of the ceramic matrix composite bring great challenges to processing, and a series of problems of high cutting force, high cutting temperature, rapid cutter wear, low processing surface quality, subsurface damage and the like exist in the processing process of the ceramic matrix composite.
The ultrasonic vibration assisted machining technique can change the machining mechanism by the contact and separation characteristics between the tool and the workpiece, reduce the cutting force and the cutting temperature, and reduce subsurface damage, and has been widely used in the machining of hard and brittle materials. The invention patent with application publication number of CN117415481A discloses a processing method of a ceramic matrix composite micro-hole, which comprises two steps, namely, firstly processing a primary micro-hole by using laser, and then processing the micro-hole by using ultrasonic auxiliary drilling of 20 kHz. The invention patent with application publication number of CN117283725A discloses a multi-energy field processing method of a ceramic matrix composite, which comprises the steps of firstly adopting an electric arc processing mode to perform rough processing on a workpiece, and then adopting an ultrasonic vibration auxiliary processing mode with working frequency of 16-24kHz to perform finish processing on the workpiece after rough processing to the size of a final part. The processing method of the hard and brittle material is complex, the ultrasonic frequency is low during ultrasonic vibration auxiliary processing, and the effect of ultrasonic vibration is weakened during high-speed processing, so that a high-frequency ultrasonic knife handle suitable for processing the hard and brittle material is needed in the industry.
CN201710238433.4 discloses an integral composite ultrasonic knife handle device, the knife handle main body and a knife tool arranged at the front end of the knife handle main body, a high-frequency longitudinal-torsional composite ultrasonic vibrator is arranged in the knife handle main body, a convex ring is formed on the outer peripheral surface of the knife handle main body, a primary magnetic core mounting seat is rotatably arranged outside the knife handle main body, and the primary magnetic core mounting seat is close to the convex ring; a secondary coil assembly is arranged in the convex ring, a primary coil assembly is arranged in the primary magnetic core mounting seat, and the secondary coil assembly and the primary coil assembly are oppositely arranged; and a stop power supply connecting plug is fixed on the outer circular surface of the primary side magnetic core mounting seat, and the inner lead wire plug wires of the stop power supply connecting plug are respectively connected with leads at two ends of the primary side coil. The ultrasonic knife handle structure is more convenient for installation and use of a machine tool, and can effectively reduce grinding force, prolong the service life of a cutter and improve the grinding effect. But the output frequency is lower and is in the range of 20-90 kHz; and the vibration direction is longitudinal-torsional ultrasonic vibration.
CN202110683526.4 discloses a high-frequency ultrasonic knife handle, comprising: the collet chuck is connected to the front end of the cutter handle body in sequence and is used for receiving the amplitude transformer of high-frequency mechanical vibration converted by the transducer; the front end of the tool handle body is provided with a first accommodating cavity, and the collet is detachably connected with the tool handle body and is partially inserted into the first accommodating cavity; and a vibration energy blocking structure is arranged at the connecting part of the collet and the amplitude transformer and is used for reducing the transmission of high-frequency mechanical vibration transmitted by the amplitude transformer to the collet. The high-frequency ultrasonic knife handle, the knife device and the ultrasonic machine tool have simple and small structure and little energy loss, and can meet the requirement of ultrahigh-frequency vibration. But the first conductive part on the handle shell is elastically connected with the second conductive part on the collet, the transducer is connected with the second conductive part through a wire, and the transducer and the cutter are inconvenient to replace.
CN201310076528.2 discloses an ultrasonic elliptic vibration milling cutter handle device, which comprises a power supply box, an ultrasonic elliptic vibration milling cutter handle, a sealing ring and a protective cover; the upper end face of the power supply box is connected with the lower plane of a cutter head of the machine tool through a bolt, a small circular shaft of the ultrasonic elliptic vibration milling cutter handle is connected with the cutter head through a spring chuck, the upper end face of a large cylinder of the small circular shaft is in threaded connection with the lower end face of the power supply box, and the lower end face of the large cylinder of the small circular shaft is provided with a sealing ring and is connected with the protective cover through a bolt; the invention can realize flexible butt joint with the traditional machining center, realize high-frequency ultrasonic elliptical vibration milling, and solve the difficult problems of high-precision and high-efficiency milling of titanium alloy and composite materials. The ultrasonic vibration processing device has wide application prospect in the technical field of ultrasonic vibration processing devices. But its output frequency is lower, in the range of 15-35 kHz.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the high-frequency ultrasonic knife handle suitable for processing the hard and brittle materials, the working frequency can reach 100-150kHz, the damage depth of the hard and brittle materials during processing is effectively reduced, the ultrasonic vibrator is easy to replace, and the processing efficiency is improved.
The technical scheme adopted by the invention is as follows:
a high-frequency ultrasonic knife handle suitable for processing hard and brittle materials comprises a knife handle shell and an ultrasonic vibrator; the ultrasonic vibrator is designed by 2 times of wavelength, and an electrode plate group on the ultrasonic vibrator is connected with an electrode ring groove on the cutter handle shell in an inserting and pulling mode; the ultrasonic vibrator is connected with the handle shell through a flange plate, and a vibration isolation gasket is arranged at the joint; the upper flange plate of the ultrasonic vibrator is arranged at the joint surface position.
Further, a positioning circular ring is arranged in the middle of the outer surface of the cutter handle shell, and a secondary coil is arranged above the positioning circular ring; an upper cavity is formed above the inner part of the handle shell, a lower cavity is formed below the inner part of the handle shell, and the upper cavity is communicated with the lower cavity through a through hole; six evenly distributed threaded holes are formed in the top of the lower cavity, and an insulating gasket and a secondary electrode ring are connected below the threaded holes through insulating bolts; six threaded holes are uniformly formed in the annular shell below the cutter handle shell.
Further, the insulating spacer is of a circular ring structure, and six through holes which are uniformly distributed are formed in the insulating spacer.
Further, the secondary electrode ring consists of two half secondary electrode rings, the periphery of the secondary electrode ring is provided with an electrode ring groove, and six evenly distributed through holes are formed in the secondary electrode ring.
Further, the ultrasonic vibrator is of an integrated structure of a transducer and an amplitude transformer, and the transducer comprises a stud, an insulating tube, a rear cover plate, four piezoelectric ceramic plates, two electrode plate groups and a flange plate; the upper surface of the amplitude transformer is conical, the lower surface of the amplitude transformer is cylindrical, and threads are formed on the cylindrical section of the amplitude transformer.
Further, the mounting steps of the transducer are as follows: firstly, an insulating tube is arranged on a stud, then a piezoelectric ceramic sheet and an electrode sheet group are alternately arranged outside the insulating tube, and finally a rear cover plate is arranged on the stud.
Further, the upper half part of the rear cover plate is a hexahedral column, and the lower half part of the rear cover plate is a cylinder.
Further, the rear cover plate in the ultrasonic vibrator is made of stainless steel, the stud, the flange plate and the amplitude transformer in the ultrasonic vibrator are made of aluminum alloy, and the working frequency of the ultrasonic vibrator is 100-150kHz.
Compared with the prior art, the invention has the beneficial effects that:
(1) The ultrasonic vibrator is connected with a cutter handle shell through bolts, and the cutter handle shell is connected to a machine tool spindle. The ultrasonic vibrator adopts 2 times wavelength design for the size of ultrasonic vibrator can satisfy the requirement of processing, and the electric energy on the secondary coil passes through the secondary electrode ring and transmits to ultrasonic vibrator, and ultrasonic vibrator transmits longitudinal ultrasonic vibration to the amplitude transformer, and the amplitude transformer carries the instrument to do high frequency longitudinal vibration, the effectual damage degree of depth when reducing hard brittle material processing.
(2) The electrode plate group on the ultrasonic vibrator is connected with the electrode ring groove in a plug-in mode, so that the structure is simple, and the ultrasonic vibrator is convenient to replace; the ultrasonic vibrator is connected with the cutter handle shell in a bolt connection mode, the vibration isolation gasket is arranged at the joint, and the cutter is connected with the amplitude transformer in a threaded connection mode, so that the replacement is facilitated.
(3) The energy loss of the joint of the conventional energy converter and the amplitude transformer is avoided, the flange plate in the ultrasonic vibrator is arranged at the joint surface position, and the vibration isolation gasket is arranged at the joint of the flange plate of the ultrasonic vibrator and the cutter handle shell, so that the energy loss is further reduced, the electromechanical conversion efficiency of the ultrasonic vibrator is higher, the working frequency is more stable, and the heating during working is less.
(4) The ultrasonic frequency output by the ultrasonic cutting machine is greatly improved, the working frequency is 100-150kHz, the speed limit of the conventional frequency ultrasonic cutting machining is broken through, and the high-efficiency and high-quality machining of the hard and brittle materials under the high-speed condition can be realized.
Drawings
FIG. 1 is a schematic cross-sectional view of a high-frequency ultrasonic tool shank suitable for processing a brittle material;
FIG. 2 is a schematic cross-sectional view of a handle housing according to the present invention;
FIG. 3 is a schematic view of a secondary electrode ring according to the present invention;
FIG. 4 is a schematic diagram of an ultrasonic transducer according to the present invention;
FIG. 5 is a schematic view of an electrode sheet set according to the present invention;
FIG. 6 is a schematic diagram of the calculation of the length of each part of an ultrasonic vibrator;
FIG. 7 is a diagram of simulation results of ultrasonic vibrator modes;
FIG. 8 is a graph of a high frequency ultrasonic tool shank frequency amplitude test interface, from which it can be seen that the tool shank frequency can reach 134kHz, the amplitude can reach 1.22 μm, and the amplitude is stable;
FIG. 9 is a graph of subsurface damage for ceramic matrix composites processed by tool shanks in accordance with the invention.
In the figure: 10-handle shell, 11-insulating bolt, 12-secondary coil, 13-positioning circular ring, 14-lower cavity, 15-secondary electrode ring, 151-electrode ring groove, 152-electrode ring through hole, 16-insulating gasket, 17-upper cavity, 20-vibration isolation gasket, 30-ultrasonic vibrator, 31-hexagonal bolt, 32-stud, 33-back cover plate, 34-electrode plate group I, 35-piezoceramics piece, 36-flange, 37-amplitude transformer, 38-amplitude transformer cylinder section, 39-electrode plate group II, 40-insulating tube.
Detailed Description
Embodiments of the present invention are described in further detail below with reference to the accompanying drawings.
In the description of the present application, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "top", "bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application. Unless specifically stated and limited otherwise, the terms "mounted," "disposed," "connected," and "connected" are to be construed broadly so that those of ordinary skill in the art will understand the meaning of the terms in this disclosure as the case may be.
Example 1
As shown in fig. 1, a high-frequency ultrasonic knife handle suitable for processing hard and brittle materials comprises a knife handle shell 10 and an ultrasonic vibrator 30; the ultrasonic vibrator 30 is designed by adopting 2 times of wavelength, so that the longitudinal size of the ultrasonic vibrator 30 is larger, and the requirement of normal processing can be met; the electrode plate group 34 on the ultrasonic vibrator 30 is connected with the electrode ring groove 151 on the cutter handle shell 10 in a plug-in mode, and replacement of the ultrasonic vibrator 30 is facilitated; the ultrasonic vibrator 30 is connected with the cutter handle shell 10 through a flange 36, and the vibration isolation gasket 20 is arranged at the joint, so that ultrasonic energy can be prevented from being transmitted to the cutter handle shell 10 through the flange 36; the position of the flange 36 on the ultrasonic vibrator 30 is a joint surface, so that energy loss can be further avoided.
As shown in fig. 2, a positioning ring 13 is arranged in the middle of the outer surface of the handle shell 10, and is used for determining the position of the secondary coil 12, and the secondary coil 12 is arranged above the positioning ring; an upper cavity 17 is formed above the inner part of the cutter handle shell 10, the upper cavity 17 is connected with a main shaft of a machine tool, a lower cavity 14 is formed below the inner part of the cutter handle shell 10, an ultrasonic vibrator 30 is arranged in the lower cavity 14, and the upper cavity 17 and the lower cavity 14 are communicated through a through hole; six evenly distributed threaded holes are formed in the top of the lower cavity 14, and an insulating gasket 16 and a secondary electrode ring 15 are connected below the threaded holes through insulating bolts 11; six threaded holes are uniformly formed in the annular shell below the cutter handle shell 10 and used for connecting the ultrasonic vibrator 30.
Specifically, the insulating spacer 16 has a ring structure, and six evenly distributed through holes are formed for connecting the insulating bolts 11.
As shown in fig. 3, the secondary electrode ring 15 is formed by splicing two semicircular secondary electrode rings 15 with the same specification, the two semicircular secondary electrode rings 15 are respectively connected with two poles of the secondary coil 12, the periphery of the secondary electrode ring 15 is provided with an electrode ring groove 151 for inserting and pulling the electrode plate group 34 on the ultrasonic vibrator 30, six evenly distributed through holes are formed in the ultrasonic vibrator, and the insulating bolts 11 are connected through the holes at the same time.
As shown in fig. 4, the ultrasonic vibrator 30 is an integrated structure of a transducer and a horn 37, so that energy loss at the joint of the conventional transducer and the horn can be avoided, the transducer comprises a stud 32, an insulating tube 40, a back cover plate 33, four piezoelectric ceramic plates 35, two electrode plate groups 34 and a flange 36, and the flange 36 is arranged at a joint surface position, so that energy loss when the transducer is connected with the handle shell 10 can be avoided; the connecting end of the amplitude transformer 37 and the transducer is conical, the other end of the amplitude transformer 37 is cylindrical, the amplification factor of the amplitude transformer 37 is large, and threads are formed on the cylindrical section 38 of the amplitude transformer and are used for connecting tools. The transducer converts the high-frequency oscillation electric signal into mechanical vibration and then drives the amplitude transformer to vibrate, and the amplitude transformer amplifies and transmits the vibration to the tool with a small end part, so that the tool generates longitudinal vibration. Fig. 7 is a graph of the frequency and amplitude test interface of the high frequency ultrasonic tool shank, from which it can be seen that the tool shank frequency can reach 134kHz, the amplitude can reach 1.22 μm, and the amplitude is stable.
Specifically, the mounting steps of the transducer are as follows: the insulating tube 40 is first mounted on the stud 32, then the piezoelectric ceramic plates 35 and the electrode plate group 34 are alternately mounted outside the insulating tube 40, and finally the back cover plate 33 is mounted on the stud 32.
Further, the upper half part of the back cover plate 33 is a hexahedral column, the back cover plate 33 is conveniently screwed by using a wrench, the pre-tightening force is applied to the piezoelectric ceramic plate 35, the lower half part of the back cover plate 33 is a cylinder, and the pre-tightening force can be uniformly applied to the piezoelectric ceramic plate 35.
Further, the rear cover plate 33 in the ultrasonic vibrator 30 is made of stainless steel, the stud 32, the flange 36 and the amplitude transformer 37 in the ultrasonic vibrator 30 are made of aluminum alloy, and the working frequency of the ultrasonic vibrator 30 is 100-150kHz through material matching, so that the speed limit in conventional ultrasonic processing can be broken, and the ultrasonic vibrator is more suitable for high-speed processing.
Example 2
The ultrasonic vibrator is designed by combining theoretical calculation and modal simulation, as shown in fig. 6, the length of each part is calculated by 2 times of wavelength theory, and the calculation formula is as follows:
ω＝2πf
Zn＝ρncnSn,(n＝1,2)
Wherein: lambda Al is the wavelength in the aluminum alloy, c Al is the sound velocity in the aluminum alloy, f is the working frequency of the ultrasonic vibrator, rho n is the density, c n is the sound velocity, and S n is the sectional area;
l 1 is the length of the rear cover plate, l 2 is the total thickness of the piezoelectric ceramic sheet and the electrode sheet group, l 3 is the length of the amplitude transformer which is 0.25 times the wavelength, l 4 is the length of the amplitude transformer which is 1.5 times the wavelength, ω is the circular frequency, and Z n is the characteristic impedance.
On the basis of theoretical calculation, the length of each part of the ultrasonic vibrator is optimized through the mode simulation of ANSYS, the result is shown in fig. 7, the maximum amplitude of the cutter can be seen, the frequency of the cutter handle can reach 134kHz, the amplitude can reach 1.22 mu m, and the amplitude is stable, as can be seen from fig. 8.
Example 3
The high-frequency Ultrasonic knife handle is used for grinding the ceramic matrix composite on a DMG Ultrasonic 20Linear vertical Ultrasonic machining center, the frequency is 134kHz, the Ultrasonic amplitude is 1.22 mu m, the spindle rotating speed is 8000r/min, the grinding depth is 100 mu m, and the feeding speed is 34mm/min. The processed ceramic matrix composite is ground and polished, and the scanning electron microscope is used for observing the damage depth of the processed subsurface, as shown in fig. 9, the damage depth is small when the high-frequency ultrasonic knife handle is used for processing, and the high-frequency ultrasonic knife handle can effectively reduce the damage depth when the hard and brittle material is processed.
The above embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention are intended to be within the scope of the present invention as claimed.
Claims (8)
1. The high-frequency ultrasonic knife handle is suitable for processing hard and brittle materials and is characterized by comprising a knife handle shell and an ultrasonic vibrator; the ultrasonic vibrator is designed by 2 times of wavelength, and the tail end of the ultrasonic vibrator is inserted into the inner cavity of the cutter handle shell and is connected with the inner cavity of the cutter handle shell in a plug-in mode; the ultrasonic vibrator is connected with the handle shell through a flange plate, and a vibration isolation gasket is arranged at the joint; the ultrasonic vibrator comprises a transducer and a amplitude transformer, the transducer and the amplitude transformer are of an integrated structure, the flange plate is arranged at the joint surface position, the tool is connected to the small end part of the amplitude transformer through threads, and the output working frequency can reach more than 100 kHz.
2. The high-frequency ultrasonic knife handle suitable for processing hard and brittle materials as claimed in claim 1, wherein a positioning circular ring is arranged in the middle of the outer surface of the knife handle shell, and a secondary side coil is arranged above the positioning circular ring; screw holes are uniformly formed in the cross section of the end part of the shell, and bolts penetrate through the screw holes to fix the cutter handle shell and the flange plate of the ultrasonic vibrator together.
3. The high-frequency ultrasonic knife handle suitable for processing hard and brittle materials as claimed in claim 1, wherein the interior of the knife handle shell is of a cavity structure, a partition is arranged in the middle of the cavity to divide the cavity into an upper cavity and a lower cavity, and a bolt through hole is formed in the partition; the machine tool spindle is connected with the upper cavity; the insulating bolt is used for fixing the insulating gasket (16) and the secondary electrode ring (15) at the top of the lower cavity through the bolt through hole and then is coaxially connected with the main shaft of the machine tool.
4. A high frequency ultrasonic blade handle for processing hard and brittle materials according to claim 1, wherein the diameters of the connection parts of the transducer and the amplitude transformer of the ultrasonic vibrator are equal; the flange plate is arranged at the joint surface; the electric energy on the secondary side coil is transmitted to the ultrasonic vibrator through the secondary side electrode ring to drive the amplitude transformer to vibrate, and the amplitude transformer amplifies and transmits the vibration to the tool with the small end part, so that the tool generates longitudinal vibration;
The transducer comprises a stud, an insulating tube, a rear cover plate, four piezoelectric ceramic plates, two electrode plate groups and a flange plate; the insulating tube is arranged on the stud, the piezoelectric ceramic plates and the electrode plate groups are alternately arranged outside the insulating tube, and the rear cover plate is arranged on the stud; the upper surface of the amplitude transformer is conical, the lower surface of the amplitude transformer is cylindrical, and the cylindrical section of the amplitude transformer is provided with threads for connecting a tool.
5. The high-frequency ultrasonic knife handle suitable for processing hard and brittle materials as claimed in claim 4, wherein the secondary electrode ring is formed by splicing two semicircular secondary electrode rings with the same specification, the periphery of the secondary electrode ring is provided with an electrode ring groove, and six evenly distributed through holes are formed in the secondary electrode ring; the electrode plate group of the ultrasonic vibrator is connected with the electrode ring groove in a plug-in mode; the secondary electrode ring is fixed in the inner cavity of the cutter handle shell through the through hole by virtue of bolts.
6. The high-frequency ultrasonic knife handle suitable for processing hard and brittle materials according to claim 3, wherein the material of the ultrasonic vibrator rear cover plate is stainless steel, the materials of the stud, the flange and the amplitude transformer in the ultrasonic vibrator are aluminum alloy, and the working frequency of the ultrasonic vibrator is 100-150kHz.
7. The high frequency ultrasonic blade handle of claim 1, wherein the ultrasonic transducer is designed with a 2-fold wavelength, and is selected based on the following formula:
ω＝2πf
Zn＝ρncnSn,(n＝1,2)
Wherein: lambda Al is the wavelength in the aluminum alloy, c Al is the sound velocity in the aluminum alloy, f is the working frequency of the ultrasonic vibrator, rho n is the density, c n is the sound velocity, and S n is the sectional area;
l 1 is the length of the rear cover plate, l 2 is the total thickness of the piezoelectric ceramic sheet and the electrode sheet group, l 3 is the length of the amplitude transformer which is 0.25 times the wavelength, l 4 is the length of the amplitude transformer which is 1.5 times the wavelength, ω is the circular frequency, and Z n is the characteristic impedance.
8. The method for using the high-frequency ultrasonic knife handle for processing the hard and brittle materials according to claim 1, which is characterized by comprising the following steps:
(1) Mounting an insulating tube (40) on the stud (32), then alternately mounting the piezoelectric ceramic plates (35) and the electrode plate groups (34) outside the insulating tube (40), and finally mounting the rear cover plate (33) on the stud (32);
(2) The insulating bolt (11) passes through the secondary electrode ring (15), the insulating gasket (16) and the threaded hole at the top of the lower cavity 14 at the same time to fix the secondary electrode ring (15) in the inner cavity of the handle shell; two semicircular secondary electrode rings (15) are respectively connected with two poles of the secondary coil (12); the secondary coil (12) is arranged above the positioning circular ring of the cutter handle shell;
(3) The electrode plate group (34) of the ultrasonic vibrator is connected with an electrode ring groove (151) fixed on a secondary electrode ring (15) in the inner cavity of the cutter handle shell in a plug-in mode; the end part of the amplitude rod at the other end of the ultrasonic vibrator is connected with a tool through threads; the flange plate at the joint surface of the ultrasonic vibrator is fixed with the end part of the cutter handle shell through bolts, and a vibration isolation gasket is arranged at the joint;
(4) The electric energy on the secondary side coil is transmitted to the ultrasonic vibrator through the secondary side electrode ring, and the amplitude transformer amplifies the vibration, outputs high-frequency vibration and transmits the high-frequency vibration to the tool at the end part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410467008.2A CN118418309A (en) | 2024-04-18 | 2024-04-18 | High-frequency ultrasonic knife handle suitable for processing hard and brittle materials and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410467008.2A CN118418309A (en) | 2024-04-18 | 2024-04-18 | High-frequency ultrasonic knife handle suitable for processing hard and brittle materials and use method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118418309A true CN118418309A (en) | 2024-08-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410467008.2A Pending CN118418309A (en) | 2024-04-18 | 2024-04-18 | High-frequency ultrasonic knife handle suitable for processing hard and brittle materials and use method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118418309A (en) |
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2024
- 2024-04-18 CN CN202410467008.2A patent/CN118418309A/en active Pending
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