Ultrasonic machining device with inner and outer ring design, ultrasonic spindle, ultrasonic machine tool and ultrasonic drill

Abstract

An ultrasonic machining device with inner and outer ring design, an ultrasonic spindle having same, an ultrasonic machine tool and an ultrasonic drill. Said ultrasonic machining device comprises a tool (1), a wireless transmission mechanism (3) and an ultrasonic transducer (2); the wireless transmission mechanism (3) comprises a transmitting unit (31) and a receiving unit (32) which are arranged in an inner ring and an outer ring; the ultrasonic transducer (2) is electrically connected to the receiving unit (32); and structural parameters of the transmitting unit (32) and the receiving unit (32) meet a preset relational expression, such that the apparent power and the introduced peak current of the transmitting unit (31) and those of the receiving unit (32) can match respective working structural parameters and performance, and on a path of radial circulation of a magnetic flux line, the structure of the transmitting unit (31) and the structure of the receiving unit (32) can better transmit and receive magnetic field energy, thereby better converting the energy of the wireless transmission mechanism (3) into mechanical vibration, reducing the temperature and the temperature rise speed of the transmitting unit (32) and the receiving unit (32) in a working state, improving the stability of continuous working of the ultrasonic spindle, and improving the energy conversion rate.

Description

Inner and outer ring ultrasonic processing device, ultrasonic spindle, ultrasonic machine tool and ultrasonic drill Technical Field

[0001] The present invention relates to the technical field of ultrasonic machining, and in particular to an ultrasonic machining device for inner and outer rings, an ultrasonic spindle, an ultrasonic machine tool and an ultrasonic drill. Background Art

[0002] Advanced materials, such as functional ceramics, optical crystals, high-strength and toughness alloys, and ceramic-based composites, possess excellent mechanical, physical, and chemical properties. However, these materials are also typically difficult to machine. During the cutting process, they present bottlenecks such as easy wear of cutting tools, short tool life, poor machining quality, and low machining efficiency, which are difficult to fully address using traditional machining methods.

[0003] Ultrasonic machining is a machining method that applies micron-level ultrasonic frequency vibrations to a tool or workpiece, controlling the frequency, amplitude, and direction of the vibrations to produce periodic, high-frequency separations between the tool and the workpiece. Extensive research and practice have demonstrated that, compared to traditional machining, ultrasonic machining offers significant advantages in suppressing microcracks, reducing cutting forces, extending tool life, minimizing workpiece burrs, and improving machining efficiency when machining difficult-to-machine metals, hard and brittle materials, and new composite materials.

[0004] An ultrasonic machining device can be considered to be an ordinary tool with an ultrasonic transmission mechanism and an ultrasonic transducer added to it, to achieve high-frequency vibration of the tool during machining. Existing ultrasonic transmission mechanisms generally employ an inner and outer ring layout design in which a transmitting unit is sheathed around a receiving unit. When an alternating current is passed through the transmitting unit, it generates an induced magnetic field, and the magnetic flux lines circulate radially in the ultrasonic transmission mechanism, achieving inductive communication between the transmitting unit and the receiving unit, thereby providing an energy source for high-frequency vibration of the ultrasonic machining device. However, as the magnetic flux lines circulate radially in the ultrasonic transmission mechanism, they pass through the structures of the transmitting and receiving units and are subsequently reduced by the structures of the transmitting and receiving units, ultimately affecting the output of the ultrasonic machining device. Therefore, the structural layout of the ultrasonic transmission mechanism is closely related to the output of the ultrasonic machining device.

[0005] Existing ultrasonic machining devices do not associate the structural parameters of the ultrasonic transmission mechanism with its apparent power in the working state. During operation, the existing ultrasonic machining devices are prone to excessive consumption of the energy output by the ultrasonic transmission mechanism in the form of heat energy because the apparent power cannot match the structural parameters of the ultrasonic transmission mechanism. As a result, the temperature rise rate of the ultrasonic transmission mechanism gradually increases over time, thereby affecting the working stability, transmission efficiency and service life of the ultrasonic transmission mechanism. Summary of the Invention

[0006] The object of the present invention is to provide an ultrasonic machining device with an inner and outer ring design, which can help improve working stability and transmission efficiency, reduce the temperature rise rate of the ultrasonic transmission mechanism, and extend the service life.

[0007] In order to achieve the above-mentioned object, the present invention provides an inner and outer ring ultrasonic machining device, comprising:

[0008] A blade body, wherein an ultrasonic transducer is provided in the blade body;

[0009] a wireless transmission mechanism, the wireless transmission mechanism comprising a transmitting unit and a receiving unit, the receiving unit being disposed on the outer peripheral side of the blade body, the transmitting unit being disposed on the outer peripheral side of the receiving unit, the transmitting unit and the receiving unit being disposed opposite to each other and separated by an air gap; the transmitting unit comprising a transmitting coil and a transmitting magnet for generating a magnetic field based on current in the transmitting coil, the receiving unit comprising a receiving coil and a receiving magnet for receiving the magnetic field generated by the transmitting unit, and

[0010] an ultrasonic transducer, the ultrasonic transducer being electrically connected to the receiving unit;

[0011] The frequency of the electrical signal input to the receiving unit is f Hz, and the air gap magnetic resistance of the wireless transmission mechanism is R δ Henry -1 , the magnetic resistance of the transmitting unit is R 发射 Henry -1 , the magnetic resistance of the receiving unit is R 接收 Henry -1 ,

[0012] And the number of turns of the transmitting coil is N 发射 , the apparent power of the transmitting unit is Q 发射 volt-ampere, the peak current passed into the emission unit is I 发射 If , the above parameters satisfy the relationship:

[0013] The number of turns of the receiving coil is N 接收 , the apparent power of the receiving unit is Q 接收 volt-ampere, the peak current passed into the receiving unit is I 接收 If , the above parameters satisfy the relationship:

[0014] Where 2≤N 发射 ≤240, 2≤N 接收 ≤240, K1 is the correction coefficient, 0.5≤K1≤1.5.

[0015] In some embodiments of the present invention, the angle of the launch unit around the outer circumference of the blade body is θ radians.

[0016] In some embodiments of the present invention, when θ=2π, a first wire-embedded groove wound around the blade body is opened on the end surface of the transmitting magnet facing the receiving unit, the transmitting coil is accommodated in the first wire-embedded groove, the transmitting magnet includes a first annular side plate, a first annular top plate and a first annular bottom plate, the first annular top plate is connected to the rear side of the first annular side plate, the first annular bottom plate is connected to the front side of the first annular side plate, and a first wire-embedded groove opening toward the receiving unit is formed between the first annular side plate, the first annular top plate and the first annular bottom plate; wherein the thickness of the first annular top plate is T 2a mm, the thickness of the first annular bottom plate is T 2b mm, the inner diameter of the emitting magnet is D4 mm, the outer diameter of the emitting magnet is D6 mm, the length of the opening of the first buried wire groove extending along the axial direction of the blade body is B2 mm, the depth of the first buried wire groove is E2 mm, and the diameter of the first buried wire groove is D5 mm;

[0017] The end surface of the receiving magnet facing the transmitting unit is provided with a second wire-embedding groove arranged in an annular manner on the blade body, and the receiving coil is accommodated in the second wire-embedding groove. The receiving magnet includes a second annular side plate, a second annular top plate and a second annular bottom plate. The second annular top plate is connected to the rear side of the second annular side plate, and the second annular bottom plate is connected to the front side of the second annular side plate. A second wire-embedding groove opening toward the transmitting unit is formed between the second annular side plate, the second annular top plate and the second annular bottom plate; wherein the thickness of the second annular top plate is T 1a mm, the thickness of the second annular bottom plate is T 1b mm, the inner diameter of the receiving magnet is D1 mm, the outer diameter of the receiving magnet is D3 mm, the inner diameter of the second buried wire groove is D2 mm, the length of the opening of the second buried wire groove extending along the axial direction of the blade body is B1 mm, and the depth of the second buried wire groove is E1 mm;

[0018] The relative magnetic permeability of the transmitting magnet and the receiving magnet is u, the vacuum magnetic permeability is u0 Henry / m, and the magnetic circuit area of ​​the second annular side plate is S1. The magnetic circuit area S1 satisfies:

[0019] The magnetic resistance R of the receiving unit 接收 The relationship with the above parameters is as follows: R 接收 =R1+R2+R3, wherein R1 is the magnetic resistance of the second annular side plate, R2 is the magnetic resistance of the second annular top plate, and R3 is the magnetic resistance of the second annular bottom plate; the magnetic resistance of the transmitting unit R 发射 The relationship with the above parameters is as follows: R 发射 =R4+R5+R6

[0020] Among them, R4 is the magnetic resistance of the first annular side plate, R5 is the magnetic resistance of the first annular top plate, and R6 is the magnetic resistance of the first annular bottom plate.

[0021] In some embodiments of the present invention, when θ=2π, the air gap magnetic resistance of the wireless transmission mechanism is R δ Henry -1 , the width of the air gap is L mm, the vacuum permeability is u0 Henry / m; the air gap reluctance R δ Satisfies: R δ =K2×(R7+R8)

[0022] Wherein, R7 is the air gap magnetic resistance between the first annular top plate and the second annular top plate, R8 is the air gap magnetic resistance between the first annular bottom plate and the second annular bottom plate, K2 is the magnetic resistance correction coefficient, 0.2≤K2≤3. Based on the structural parameters of the transmitting magnet and the receiving magnet,

[0023] When T 1a <T 2a , then T7=T 1a , if T 1a >T 2a , then T7=T 2a , when T 1b <T 2b , then T8=T 1b , if T 1b >T 2b , then T8=T 2b , R7 and R8 satisfy the relationship:

[0024] Where m = 7 or 8, and the parameters β, γ, and a satisfy: a=2×kb m =k×D3+T m

[0025] If T 1a =T 2a , then T7=T 1a , if T 1b =T 2b , then T8=T 1b , R7 and R8 satisfy the relationship:

[0026] Wherein, m=7 or 8.

[0027] In some embodiments of the present invention, when When the transmitting magnet faces the receiving unit, a first wire-embedded groove is provided on the blade body, the transmitting coil is accommodated in the first wire-embedded groove, and the transmitting magnet includes a connecting side plate, a connecting top plate and a connecting bottom plate, wherein,

[0028] The connecting top plate is connected to the rear side of the connecting side plate, and a top arc surface that matches the receiving unit is provided on the end surface of the connecting top plate facing the receiving unit; the connecting bottom plate is connected to the front side of the connecting side plate, and a bottom arc surface that matches the receiving unit is provided on the end surface of the connecting bottom plate facing the receiving unit. The top arc surface and the bottom arc surface enable the transmitting magnet to be arranged around the periphery of the receiving unit and close to the receiving unit.

[0029] A first buried wire groove with an opening toward the receiving unit is formed between the connecting side plate, the connecting top plate, and the connecting bottom plate. The transmitting coil is arranged around the connecting side plate and partially buried in the first buried wire groove. The length of the connecting side plate can be less than the length of the connecting top plate, and the length of the connecting side plate can be less than the length of the connecting bottom plate, so that when the transmitting coil is wound on the connecting side plate, the transmitting coil is wrapped by the connecting top plate and the connecting bottom plate.

[0030] Among them, the thickness of the connecting side plate is A2 mm, the length of the connecting side plate is H3 mm, and the thickness of the connecting top plate is T 2a mm, the thickness of the connecting base plate is T 2b mm, the minimum width from the outermost edge of the emitting magnet to the inner arc surface is B3 mm, the inner diameter of the emitting magnet is D4 mm, the length of the opening of the first wire-embedding groove extending along the axial direction of the blade body is B2 mm, and the depth of the first wire-embedding groove is E2 mm. It should be noted that because the emitting unit is arranged on the outer peripheral side of the receiving unit, the inner side of the emitting magnet refers to the end side of the emitting magnet facing the receiving unit, and the outer side of the emitting magnet refers to the end side of the emitting magnet facing away from the receiving unit. The inner arc surface of the emitting magnet is formed on the inner side of the emitting magnet and is close to the receiving unit, forming an air gap between the inner arc surface of the emitting magnet and the receiving unit.

[0031] The end surface of the receiving magnet facing the transmitting unit is provided with a second wire-embedding groove arranged in an annular manner on the blade body, the receiving coil is accommodated in the second wire-embedding groove, the receiving magnet includes a second annular side plate, a second annular top plate and a second annular bottom plate, the second annular top plate is connected to the rear side of the second annular side plate, the second annular bottom plate is connected to the front side of the second annular side plate, and a second wire-embedding groove opening toward the transmitting unit is formed between the second annular side plate, the second annular top plate and the second annular bottom plate; wherein the thickness of the second annular top plate is T 1a mm, the thickness of the second annular bottom plate is T 1bmm, the inner diameter of the receiving magnet is D1 mm, the outer diameter of the receiving magnet is D3 mm, the inner diameter of the second buried wire groove is D2 mm, the length of the opening of the second buried wire groove extending along the axial direction of the blade body is B1 mm, and the depth of the second buried wire groove is E1 mm;

[0032] The relative magnetic permeability of the transmitting magnet and the receiving magnet is u, the vacuum magnetic permeability is u0 Henry / m, and the magnetic circuit area of ​​the second annular side plate is S1. The magnetic circuit area S1 satisfies:

[0033] The magnetic resistance R of the receiving unit 接收 The relationship with the above parameters is as follows: R 接收 =R1+R2+R3

[0034] Among them, R1 is the magnetic resistance of the second annular side plate, R2 is the magnetic resistance of the second annular top plate, and R3 is the magnetic resistance of the second annular bottom plate; the magnetic resistance R of the transmitting unit 发射 The relationship with the above parameters is as follows: R 发射 =R4+R5+R6

[0035] Among them, R4 is the magnetic resistance connected to the side plate, R5 is the magnetic resistance connected to the top plate, and R6 is the magnetic resistance connected to the bottom plate.

[0036] In some embodiments of the present invention, when When the air gap magnetic resistance of the wireless transmission mechanism is R δ Henry -1 , the width of the air gap is L mm, the vacuum permeability is u0 Henry / m; the air gap reluctance R δ Satisfies: R δ =K2×(R7+R8)

[0037] Among them, R7 is the air gap magnetic resistance between the top plate and the second annular top plate, R8 is the air gap magnetic resistance between the bottom plate and the second annular bottom plate, K2 is the magnetic resistance correction coefficient, 0.2≤K2≤3. Based on the structural parameters of the transmitting magnet and the receiving magnet,

[0038] When T 1a <T 2a , then T7=T 1a , if T 1a >T 2a , then T7=T 2a , when T 1b <T 2b , then T8=T 1b , if T 1b>T 2b , then T8=T 2b , R7 and R8 satisfy the relationship:

[0039] Where m = 7 or 8, and the parameters β, γ, and a satisfy: a=2×kb m =k×D3+T m

[0040] If T 1a =T 2a , then T7=T 1a , if T 1b =T 2b , then T8=T 1b , R7 and R8 satisfy the relationship:

[0041] Wherein, m=7 or 8.

[0042] In some embodiments of the present invention, the width of the air gap is L mm, and 0.1≤L≤3.

[0043] In some embodiments of the present invention, the outer periphery of the blade body extends radially outward to form a first limit block, the rear end face of the receiving unit abuts against the front end face of the first limit block, the front end face of the receiving unit is connected to a second limit block, the second limit block is arranged around the blade body, and a second accommodating groove for accommodating the receiving unit is formed between the first limit block and the second limit block.

[0044] In some embodiments of the present invention, the wireless transmission mechanism includes a launcher, which is arranged on the outer peripheral side of the blade body. A first receiving groove is formed on one end surface of the launcher facing the blade body, and the transmitting magnet is received in the first receiving groove.

[0045] In some embodiments of the present invention, a variable amplitude rod is further included, and the ultrasonic transducer includes a piezoelectric vibrator, a screw and a back cover. The screw is arranged in the blade body and extends along the axial direction of the blade body. The rear end of the variable amplitude rod is fixedly connected to the screw, and the piezoelectric vibrator is sleeved on the screw. The back cover is threadedly connected to the screw and cooperates with the rear end face of the variable amplitude rod to limit the piezoelectric vibrator.

[0046] In some embodiments of the present invention, a mounting cavity is provided in the blade body, and the ultrasonic transducer is disposed in the mounting cavity.

[0047] In some embodiments of the present invention, a collet and a nut are further included that are sleeved on the outer periphery of the processing tool. The front end of the amplitude changing rod is provided with a socket extending toward the rear end. The inner circumference of the socket is conical with a diameter gradually decreasing from front to back. The collet can be inserted into the socket in conjunction with the processing tool. The nut can be threadedly connected to the amplitude changing rod and press against the collet to lock the processing tool.

[0048] In some embodiments of the present invention, the collet includes a conical barrel section adapted to the insertion hole, and the collet has a plurality of first deformation grooves spaced apart along its circumference, wherein the first deformation grooves extend to or through the conical barrel section;

[0049] The first deformation groove connects the outer side surface and the inner side surface of the collet. The first deformation groove extends from the front end surface of the collet along the axial direction of the collet to the rear end surface of the collet through the conical cylinder section and extends to the rear end surface of the collet. There is a first gap between the rear groove surface of the first deformation groove and the rear end surface of the collet.

[0050] In some embodiments of the present invention, the collet has a plurality of second deformation grooves spaced apart along its circumference, the second deformation grooves extending to or extending through the conical cylinder section, and the second deformation grooves are spaced apart from and staggered with the first deformation grooves;

[0051] A front groove surface of the second deformation groove has a second interval with the front end surface of the collet, and a rear groove surface of the second deformation groove is flush with the rear end surface of the collet.

[0052] Based on the above-mentioned invention purposes, the present invention also provides an ultrasonic spindle, including a first rotation output unit, a processing tool and the aforementioned inner and outer ring ultrasonic processing device, the rear end of the tool body is assembled on the first rotation output unit, and the processing tool is assembled on the ultrasonic transducer.

[0053] Based on the above invention objectives, the present invention further provides an ultrasonic machine tool, which includes a machine tool body and the aforementioned ultrasonic spindle, wherein the ultrasonic spindle is mounted on the machine tool body.

[0054] Based on the above-mentioned invention purposes, the present invention also provides an ultrasonic drill, including a shell, a second rotary output unit, a machining tool and the aforementioned inner and outer ring ultrasonic machining device, the front end face of the shell is provided with a rearwardly extending accommodating cavity, the rear end of the tool body is accommodated in the accommodating cavity and connected to the output end of the second rotary output unit, and the tool body is connected to the shell through the bearing, the inner and outer ring ultrasonic machining device is arranged in the accommodating cavity and connected to the shell, and the machining tool is connected to the ultrasonic transducer.

[0055] The implementation of the embodiments of the present invention has the following technical effects:

[0056] The inner and outer ring ultrasonic machining device provided by the present invention causes the magnetic flux lines to circulate radially in the ultrasonic transmission mechanism through a receiving unit disposed on the outer periphery of the cutter body and a transmitting unit disposed on the outer periphery of the receiving unit. The structural parameters of the receiving unit and the transmitting unit respectively satisfy the relationship:

[0057] When the ultrasonic machining device is in working state, the receiving unit takes the apparent power Q 接收 Operation, the transmitting unit with apparent power Q 发射 During operation, the peak current passed into the transmitting unit and the receiving unit, as well as the apparent power of the two, can be coordinated with the structural parameters and performance of the transmitting unit and the receiving unit. On the path of radial circulation of the magnetic flux lines, the structure of the transmitting unit and the structure of the receiving unit located inside it can better transmit and receive magnetic field energy, so that the energy of the wireless transmission mechanism can be better converted into mechanical vibration, thereby improving the transmission efficiency of the wireless transmission mechanism under working conditions, reducing the temperature rise rate of the wireless transmission mechanism under working conditions, and improving the stability of continuous operation of the equipment; further, based on reasonable processing needs, the increase in the amplitude of the processing tool installed on the cutter body can be basically consistent with the increase in the apparent power of the wireless transmission mechanism, which can help avoid the conversion of energy into heat consumption and improve the energy conversion rate.

[0058] The ultrasonic spindle, ultrasonic machine tool and ultrasonic drill provided by the present invention, which are equipped with the ultrasonic processing device, also have the effects of low temperature rise during operation and high continuous operation stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] The present invention will be described in more detail below with the aid of the accompanying drawings. Regardless of a specific combination of technical features, the technical features shown in the drawings and / or described below are generally technical features of the present invention and improve the present invention accordingly.

[0060] It should be noted that in different drawings, the same reference numerals denote the same or substantially the same components.

[0061] FIG1 is a schematic structural diagram of a preferred embodiment 1 of the present invention;

[0062] FIG2 is a front view of the structure of the embodiment shown in FIG1;

[0063] FIG3 is a partial schematic diagram of the cross-sectional structure at AA in FIG2 ;

[0064] FIG4 is an enlarged schematic diagram of point B in FIG3 ;

[0065] FIG5 is a schematic diagram of a partial structure of the embodiment shown in FIG1 ;

[0066] FIG6 is a schematic structural diagram of the launcher;

[0067] FIG7 is a top view of the receiving magnet in the embodiment shown in FIG4 ;

[0068] FIG8 is a cross-sectional view at CC in FIG7;

[0069] FIG9 is a top view of the transmitting magnet in the embodiment shown in FIG4 ;

[0070] FIG10 is a cross-sectional view at DD in FIG9;

[0071] FIG11 is an exploded view of a local structure of the embodiment shown in FIG1 ;

[0072] Figure 12 is a schematic structural diagram of a collet;

[0073] FIG13 is a schematic diagram of a partial structure of a preferred embodiment 2 of the present invention;

[0074] FIG14 is a schematic structural diagram of the transmitting magnet in the embodiment shown in FIG13;

[0075] FIG15 is a top view of the connecting top plate in the embodiment shown in FIG13;

[0076] FIG16 is a side view of the transmitting magnet in the embodiment shown in FIG13;

[0077] FIG17 is a front view of the transmitting magnet in the embodiment shown in FIG13;

[0078] FIG18 is a cross-sectional view of a preferred embodiment 4 of the present invention;

[0079] FIG19 is an enlarged schematic diagram of point E in FIG18 .

[0080] Description of reference numerals:

[0081] 100, ultrasonic main shaft, 110, first rotation output unit, 111, locking ring, 112, spacer;

[0082] 200, ultrasonic drill, 210, housing, 211, accommodating chamber, 220, second rotation output unit, 221, gripping handle, 230, bearing;

[0083] 10. Ultrasonic processing device;

[0084] 20. Processing tools;

[0085] 1. Blade, 11. Mounting cavity, 12. First limit block, 2. Ultrasonic transducer, 21. Piezoelectric vibrator, 22. Screw, 23. Back cover, 24. Amplitude transformer, 241. Jack, 3. Wireless transmission mechanism, 31. Transmitting unit, 311. Transmitting coil, 312. Transmitting magnet, 312a. First annular side plate, 312b. First annular top plate, 312c. First annular bottom plate, 312d. First buried wire groove, 312e. Connecting side plate, 312f. Connecting top plate, 312g. Connecting bottom plate, 3121. Top arc surface, 3122, bottom arc surface, 32, receiving unit, 321, receiving coil, 322, receiving magnet, 322a, second annular side plate, 322b, second annular top plate, 322c, second annular bottom plate, 322d, second wire embedding groove, 33, launching frame, 331, first accommodating groove, 34, second accommodating groove, 35, second limit block, 4, air gap spacer, 5, collet, 51, conical cylinder section, 52, first deformation groove, 53, second deformation groove, 54, first interval, 55, second interval, 6, nut. DETAILED DESCRIPTION

[0086] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0087] First, it should be noted that the directions such as top, bottom, upward, and downward mentioned in this document are defined relative to the directions in the various drawings. They are relative concepts and can therefore change depending on their different locations and different practical conditions. Therefore, these or other directions should not be understood as restrictive terms. At the same time, the term "comprising" does not exclude other elements or steps, and "a" or "an" does not exclude the plurality.

[0088] In addition, it should be pointed out that any single technical feature described or implied in the embodiments of this document, or any single technical feature shown or implied in the accompanying drawings, can still be combined between these technical features (or their equivalents) to obtain other embodiments of the present invention that are not directly mentioned in this document.

[0089] In addition, it should be understood that, while the terms "first," "second," etc., are used herein to describe various types of information, such information should not be limited to these terms; these terms are merely used to distinguish information of the same type from one another. For example, "first" information could also be referred to as "second" information, and similarly, "second" information could also be referred to as "first" information without departing from the scope of the present invention.

[0090] Referring to Figures 1-4 and 7-10, one embodiment of the present invention provides an ultrasonic machining device for inner and outer rings (hereinafter referred to as ultrasonic machining device 10) comprising a blade body 1, an ultrasonic transducer 2, and a wireless transmission mechanism 3. The rear end of the blade body 1 is mounted on a first rotation output unit 110 and rotates synchronously with the first rotation output unit 110. Thus, the first rotation output unit 110, serving as the rotation output device of this embodiment, is connected to the blade body 1 and outputs torque.

[0091] The wireless transmission mechanism 3 is provided on the outer peripheral side of the blade body 1. Specifically, the wireless transmission mechanism 3 in this embodiment includes a transmitting unit 31 and a receiving unit 32.

[0092] The receiving unit 32 includes a receiving coil 321 and a receiving magnet 322 for receiving the magnetic field generated by the transmitting unit 31. The receiving unit 32 is arranged on the outer peripheral side of the blade body 1.

[0093] The transmitting unit 31 includes a transmitting coil 311 and a transmitting magnet 312 that generates a magnetic field based on the current of the transmitting coil 311. The transmitting unit 31 is arranged on the outer periphery of the receiving unit 32. The transmitting unit 31 and the receiving unit 32 are arranged opposite to each other and form an air gap 4.

[0094] Specifically, the launch unit 31 is in the shape of a full circle or a non-full circle arranged around the outer circumference of the blade body 1. It can be understood that the launch unit 31 is arranged around the outer circumference of the blade body 1 at an angle of θ. Preferably, Specifically, θ is the central angle corresponding to the circumferential extension of the emitting magnet 312 along the blade body 1 .

[0095] Example 1:

[0096] In the present embodiment 1, θ=2π. Referring to Figures 7 to 10, the transmitting magnet 312 is provided with a first wire-embedded groove 312d surrounding the outer circumference of the blade body 1 on the end surface thereof facing the blade body 1. The transmitting coil 311 is accommodated in the first wire-embedded groove 312d. Specifically, the transmitting magnet 312 in the present embodiment 1 includes a first annular side plate 312a, a first annular top plate 312b, and a first annular bottom plate 312c. The first annular top plate 312b is connected to the rear side of the first annular side plate 312a, and the first annular bottom plate 312c is connected to the front side of the first annular side plate 312a. A first wire-embedded groove 312d opening toward the receiving unit 32 is formed between the first annular side plate 312a, the first annular top plate 312b, and the first annular bottom plate 312c.

[0097] The thickness of the first annular top plate 312b is T 2a mm, the thickness of the first annular bottom plate 312c is T 2bmm, the inner diameter of the emitting magnet 312 is D4 mm, the outer diameter of the emitting magnet 312 is D6 mm, the length of the opening of the first wire-burying groove 312d extending axially along the blade body 1 is B2 mm, the depth of the first wire-burying groove 312d is E2 mm, and the diameter of the first wire-burying groove 312d is D5 mm.

[0098] The end surface of the receiving magnet 322 facing the transmitting unit 31 is provided with a second wire-embedding groove 322d arranged in an annular manner on the blade body 1, and the receiving coil 321 is accommodated in the second wire-embedding groove 322d. Specifically, the receiving magnet 322 in this embodiment 1 includes a second annular side plate 322a, a second annular top plate 322b and a second annular bottom plate 322c. The second annular top plate 322b is connected to the rear side of the second annular side plate 322a, and the second annular bottom plate 322c is connected to the front side of the second annular side plate 322a. A second wire-embedding groove 322d opening toward the transmitting unit 31 is formed between the second annular side plate 322a, the second annular top plate 322b and the second annular bottom plate 322c.

[0099] The thickness of the second annular top plate 322b is T 1a mm, the thickness of the second annular bottom plate 322c is T 1b mm, the inner diameter of the receiving magnet 322 is D1 mm, the outer diameter of the receiving magnet 322 is D3 mm, the inner diameter of the second wire-burying groove 322d is D2 mm, the length of the opening of the second wire-burying groove 322d extending axially along the blade body 1 is B1 mm, and the depth of the second wire-burying groove 322d is E1 mm.

[0100] Preferably, the parameters of the transmitting magnet 312 and the receiving magnet 322 can be measured by using a Mitutoyo percentage caliper or other tools for measuring length.

[0101] The relative magnetic permeability of the transmitting magnet 312 and the receiving magnet 322 is u, the vacuum magnetic permeability is u0 Henry / m, and the magnetic circuit area of ​​the second annular side plate 322a is S1. The magnetic circuit area S1 satisfies:

[0102] The magnetic resistance R of the receiving unit 32 接收 The relationship with the above parameters is as follows: R 接收 =R1+R2+R3 (5)

[0103] In this embodiment 1, R1 is the magnetic resistance of the second annular side plate 322a, R2 is the magnetic resistance of the second annular top plate 322b, and R3 is the magnetic resistance of the second annular bottom plate 322c;

[0104] The magnetic resistance R of the transmitting unit 31 发射The relationship with the above parameters is as follows: R 发射 =R4+R5+R6 (9)

[0105] In this embodiment 1, R4 is the magnetic resistance of the first annular side plate 312a, R5 is the magnetic resistance of the first annular top plate 312b, and R6 is the magnetic resistance of the first annular bottom plate 312c;

[0106] In this embodiment 1, the air gap magnetic resistance of the wireless transmission mechanism 3 is R δ Henry -1 , the width of the air gap is L mm, the vacuum permeability is u0 Henry / m; the air gap reluctance R δ The relationship with the above parameters is as follows: R δ =K2×(R7+R8) (10)

[0107] Here, R7 is the air gap reluctance between the first annular top plate 312b and the second annular top plate 322b, R8 is the air gap reluctance between the first annular bottom plate 312c and the second annular bottom plate 322c, and K2 is the air gap reluctance correction factor, where 0.2≤K2≤3. The air gap spacing of the wireless transmission mechanism 3 varies. At different air gap spacings, the magnetic field's magnetic path shape varies, resulting in complex magnetic field segmentation. To more accurately calculate the air gap reluctance for different air gap spacings, the parameter K2 is introduced to correct the air gap reluctance.

[0108] Based on the aforementioned parameters of the transmitting magnet 312 and the receiving magnet 322,

[0109] When T 1a <T 2a , then T7=T 1a , if T 1a >T 2a , then T7=T 2a , when T 1b <T 2b , then T8=T 1b , if T 1b >T 2b , then T8=T 2b , R7 and R8 satisfy the relationship:

[0110] Where m = 7 or 8, and F m is the edge flux coefficient, which is used to correct the effect of edge air gap reluctance on air gap reluctance.

[0111] In addition, the parameters β and γ satisfy:

[0112] Parameters a, b, and c are used to describe the area of ​​the air gap between the first annular top plate 312b and the second annular top plate 322b, and the area of ​​the air gap between the first annular bottom plate 312c and the second annular bottom plate 322c. Specifically, a=2×k (15) b m =k×D3+T m (16)

[0113] The parameter k is used to describe the shape of the air gap between the first annular top plate 312b and the second annular top plate 322b, and the air gap between the first annular bottom plate 312c and the second annular bottom plate 322c. Specifically,

[0114] If T 1a =T 2a , then T7=T 1a , if T 1b =T 2b , then T8=T 1b , R7 and R8 satisfy the relationship:

[0115] Wherein, m=7 or 8.

[0116] Based on the description of parameters a, b, c, and k, the shape and area of ​​the air gap between the first annular top plate 312b and the second annular top plate 322b, and the air gap between the first annular bottom plate 312c and the second annular bottom plate 322c can be expressed by equations (15) to (18). On this basis, according to equations (11) to (12) introducing parameters a, b, c, and k, the air gap magnetic resistance between the first annular top plate 312b and the second annular top plate 322b, and the air gap magnetic resistance between the first annular bottom plate 312c and the second annular bottom plate 322c can be obtained.

[0117] The width L of the air gap is the distance between the transmitting unit 31 and the receiving unit 32. Preferably, 0.1≤L≤3. Specifically, in different embodiments, the width L of the air gap can be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.5 mm, 2 mm, 2.5 mm or 3 mm; preferably, the width L of the air gap is 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm.

[0118] The inductance of the transmitting unit 31 is L d发射 Henry, the inductance of the receiving unit 32 is L d接收 Henry, the number of turns of the transmitting coil 311 is N 发射 , the number of turns of the receiving coil 321 is N 接收 , the air gap magnetic resistance of the wireless transmission mechanism 3 is R δ Henry -1 , the magnetic resistance of the transmitting unit 31 is R 发射 Henry -1 , the magnetic resistance of the receiving unit 32 is R 接收 Henry -1 , then:

[0119] Where 2≤N 发射 ≤240, 2≤N 接收 ≤240.

[0120] Furthermore, based on the above structure of the ultrasonic machining device 10 disclosed in this embodiment 1, the frequency of the electrical signal input to the receiving unit 32 is f Hz, and the peak current of the transmitting unit 31 is I 发射 The peak current of the receiving unit 32 is I 接收 The apparent power of the transmitting unit 31 is Q 发射 volt-ampere, the apparent power of the receiving unit 32 is Q 接 收 Volt-ampere, then the above parameters satisfy the relationship:

[0121] Substituting the above equations (21) and (22) into equations (23) and (24), respectively, we can obtain the apparent power Q of the transmitting unit 31 in this embodiment 1. 发射 The relationship between the above parameters and the apparent power of the receiving unit 32 is Q 接 收 The relationship with the above parameters is:

[0122] It should be noted that, since some of the parameters in the relationships (1)-(26) need to be measured by the ultrasonic machining device 10, in order to avoid errors in the measurement data, K1 is set. K1 is a correction coefficient, 0.5≤K1≤1.5, which is used to correct the human error in the data measurement process that causes the apparent power Q of the transmitting unit 31 发射 , the apparent power of the receiving unit 32 is Q 接收The error from the optimal apparent power, such as the measurement error of the frequency of the electrical signal input to the receiving unit 32, the measurement error of the peak current, etc., the measurement error of the frequency of the electrical signal is generally 15%, and the measurement error of the peak current is 20%; therefore, it can be understood that when there is no error in the measurement parameters, preferably, K1=1.

[0123] Thus, when the structural parameters of the transmitting unit 31 and the receiving unit 32 of the ultrasonic machining device 10 provided in this embodiment 1 meet the relationship formula (25) and the relationship formula (26), the peak currents flowing into the transmitting unit 31 and the receiving unit 32 make the apparent powers of the two meet Q 发射 , Q 接收 , that is, the structures and performances of the transmitting unit 31 and the receiving unit 32 reach a state of mutual matching, and the two constitute a stable energy transfer model. The energy transfer model is reflected in the working state, showing that the transmitting unit 31 is Q 发射 The apparent power of the receiving unit 32 is Q 接收 When the apparent power is working, the peak current passed through and the apparent power possessed can be coordinated with the structural parameters and performance of the transmitting unit 31 and the receiving unit 32, so that the energy of the wireless transmission mechanism 3 is better converted into mechanical vibration, thereby improving the transmission efficiency of the wireless transmission mechanism 3 in the working state, reducing the temperature rise of the wireless transmission mechanism 3 in the working state, and improving the stability of continuous operation of the equipment; further, it can help to avoid the conversion of energy into heat consumption, improve the energy conversion rate, and enable more energy to perform effective work, generate a larger amplitude when the processing tool 20 is working, and improve the processing efficiency.

[0124] Specifically, in order to verify that when the structural parameters of the receiving unit 32 and the transmitting unit 31 of the ultrasonic machining device 10 provided in Example 1 of the present invention satisfy the above-mentioned relationship, that is, when the structural parameters of the receiving unit 32 and the transmitting unit 31 match the peak current and the apparent power, the receiving unit 32 and the transmitting unit 31 of Example 1 of the present invention can have a lower temperature rise rate in the working state compared to the existing ultrasonic machining device, and the machining tool 20 has an amplitude increase range that is substantially consistent with the increase range of the apparent power, two sets of tests were conducted, as shown in the following table:

[0125] In Table 1A and Table 1B, the first ultrasonic machining device is tested based on the structure of the ultrasonic machining device 10 described above, and combined with equations (1)-(26), the apparent power Q of the transmitting unit 31 of the first ultrasonic machining device is obtained. 1发射 , and the apparent power Q of the receiving unit 32 1接收 :

[0126] Combined with the correction coefficient K1, we get Q 1发射 , Q 1接收 The setting range is as follows: after the first ultrasonic machining device is supplied with current, the apparent power Q of the transmitting unit 31 is measured. 2发射 Under the condition that the receiving unit 32 has the apparent power Q 2接收 After working for a preset time t under the conditions of the first ultrasonic machining device, the temperature rise measurement result of the working state within the preset time is obtained, and Q 2发射 In Q 1发射 Within the setting range, Q 2接收 In Q 1接收 Within the setting range, specifically, 0.5≤K1≤1.5.

[0127] At the same time, referring to Table 2A and Table 2B, a second ultrasonic machining device is set. Based on the structure of the transmitting unit 31 and the receiving unit 32 of the second ultrasonic machining device, according to the relations (1)-(26), the apparent power Q of the transmitting unit 31 of the second ultrasonic machining device is obtained. 3发射 and the apparent power Q of the receiving unit 32 3接收 :

[0128] Combined with the correction coefficient K1, we get Q 3发射 , Q 3接收 setting range.

[0129] After the second ultrasonic machining device is supplied with current, the apparent power Q of the transmitting unit 31 is measured. 4发射 , the receiving unit 32 has an apparent power Q 4接收 After working for a preset time t under the conditions of the second ultrasonic machining device, the temperature rise measurement result of the working state within the preset time is obtained. At this time, Q 4发射 Not in Q 3发射 Within the setting range, Q 4接收 Not in Q 3接收 within the setting range.

[0130] The test method is:

[0131] The ambient temperature is 24°C, and the air gap width L between the transmitting unit 31 and the receiving unit 32 of the first ultrasonic processing device and the second ultrasonic processing device is set to 1 mm. The transmitting unit 31 is connected to the ultrasonic generator, and the receiving unit 32 is connected to the ultrasonic transducer 2. The receiving unit 32 and the transmitting unit 31 are connected to the Yokogawa power oscilloscope to respectively collect the peak current I 发射 , I 接收 and apparent power Q 发射 , Q 接收The frequency f of the electrical signal input to the receiving unit 32 is detected by a Tektronix oscilloscope.

[0132] Table 1A

[0133] Table 1B

[0134] Table 2A

[0135] Table 2B

[0136] It should be noted that Table 1A and Table 1B are the temperature rise data of the receiving unit 32 and the transmitting unit 31, and the amplitude data of the processing tool 20 connected thereto, of the first ultrasonic processing device designed in accordance with the above-mentioned relational formulas (25) and (26) of the present invention, at a preset ambient temperature, when different peak currents are respectively passed through and the working time is continuously set to 10 minutes; Table 2A and Table 2B are the temperature rise data of the receiving unit 32 and the transmitting unit 31, and the amplitude data of the processing tool 20 connected thereto, of the second ultrasonic processing device designed in accordance with the above-mentioned relational formulas (25) and (26) of the present invention, at a preset ambient temperature, when different currents are respectively passed through and the working time is continuously set to 10 minutes.

[0137] It can be seen from Table 1A and Table 1B that when the structural parameters of the transmitting unit 31 and the receiving unit 32 match the frequency of the electrical signal input to the receiving unit 32, that is, when the ultrasonic machining device has a structure that satisfies the relationship formula (25) and the relationship formula (26) of the present invention, the structural parameters and performance of the transmitting unit 31 and the receiving unit 32 can cooperate with the peak current and the apparent power supplied, so that during the operation of the ultrasonic machining device, the energy of the wireless transmission mechanism 3 is better converted into mechanical vibration, the transmission efficiency of the wireless transmission mechanism 3 in the working state is improved, the temperature rise rate of the wireless transmission mechanism 3 in the working state is reduced, and the stability of the continuous operation of the equipment is improved; further, the increase in the amplitude of the machining tool 20 installed on the tool body 1 can be basically consistent with the increase in the apparent power of the wireless transmission mechanism 3, which can help avoid the conversion of energy into heat consumption and enable the wireless transmission mechanism 3 to operate at a higher energy conversion rate.

[0138] It can be seen from Table 2A and Table 2B that when the structural parameters of the transmitting unit 31 and the receiving unit 32 do not match the frequency of the electrical signal input to the receiving unit 32, that is, when the transmitting unit 31 and the receiving unit 32 of the second ultrasonic machining device do not satisfy the structure of the relationship formula (25) and the relationship formula (26) of the present invention, during the operation of this type of second ultrasonic machining device, the energy of its wireless transmission mechanism 3 will have a higher proportion of heat energy consumption, resulting in the temperature rise rate of this type of second ultrasonic machining device being significantly higher than that of the first ultrasonic machining device in Table 1A and Table 1B, and the amplitude generated by the machining tool 20 of this type of second ultrasonic machining device has a large increase amplitude and a large difference from the increase amplitude of the apparent power, resulting in that when the apparent power of this type of second ultrasonic machining device increases, the amplitude change of the machining tool 20 lags and changes less, and the overall energy conversion rate of the wireless transmission mechanism 3 is low.

[0139] It should be noted that in this first embodiment, the transmitting magnet 312 and the receiving magnet 322 of the first and second ultrasonic machining devices are both made of manganese-zinc ferrite, whose relative magnetic permeability u is 2500. In other embodiments, the transmitting magnet 312 can be made of any of ferrite, neodymium iron boron, high-frequency ceramic materials, powder metallurgy materials, amorphous and nanocrystalline alloys, or cobalt iron; and the receiving magnet 322 can be made of any of ferrite, neodymium iron boron, high-frequency ceramic materials, powder metallurgy materials, amorphous and nanocrystalline alloys, or cobalt iron. Based on the aforementioned relationship, the relative magnetic permeability u of the corresponding material can be introduced according to the materials used to prepare the transmitting magnet 312 and the receiving magnet 322.

[0140] It should be noted that in this embodiment 1, the apparent power Q in the first ultrasonic machining device and the second ultrasonic machining device is 2发射 , Q 2接收 , Q 4发射 , Q 4接收 , the peak current I 发射 , I 接收 , are measured by a Yokogawa power oscilloscope (model: PX8000). Specifically, this embodiment 1 provides a measurement method as follows:

[0141] Connect the CH1 voltage probe of the Yokogawa power oscilloscope to the positive and negative poles of the transmitter unit 31 respectively, and connect the CH1 current probe to the transmitter unit 31. The direction of the CH1 current probe is from the positive pole to the negative pole;

[0142] Connect the CH2 voltage probe of the Yokogawa power oscilloscope to the positive and negative poles of the receiving unit 32 respectively, and connect the CH2 current probe to the receiving unit 32, with the direction of the CH2 current probe flowing from the positive pole to the negative pole;

[0143] Press the ELEM1 button to open the CH1 measurement channel; press the U1 button and select voltage measurement, press the I1 button and select current measurement; press the P1 button to select power measurement;

[0144] Press the ELEM2 button to open the CH2 measurement channel; press the U2 button and select voltage measurement; press the I2 button and select current measurement; press the P2 button and select power measurement;

[0145] After pressing the "MODE" button, select "Numeric+Wave" mode in the "DISPLAY MODE" menu; press the "SETTING" button, and in the "NUMERIC SETTING" menu, set "Format" to "16 Items";

[0146] Press the "START / STOP" button to start the test. The apparent power and peak current of the transmitting unit 31 and the receiving unit 32 are obtained through the data displayed on the screen. Among them, I+pk1 represents the peak current of CH1, that is, the peak current passed by the transmitting unit 31; S1 represents the apparent power of CH1, that is, the apparent power of the transmitting unit 31; I+pk2 represents the peak-to-peak value of CH2 current, that is, the peak current passed by the receiving unit 32; S2 represents the apparent power of CH2, that is, the apparent power of the receiving unit 32.

[0147] In addition, in the first ultrasonic machining device and the second ultrasonic machining device, the frequency f of the electrical signal input to the receiving unit 32 is measured by a Tektronix oscilloscope (model: MDO3204). Specifically, this embodiment 1 provides a measurement method as follows:

[0148] Insert the differential probe into the CH1 interface and connect it to the positive and negative terminals of the receiving unit 32 respectively;

[0149] Open the "Menu" option, select "Edge" in the "Type" item, select "1" in the "Source" item, select "AC" in the "Coupling" item, select "Rising Edge" in the "Slope" item, set the "Level" item to "0V", and select "Auto" in the "Mode" option;

[0150] Press the "1" button to turn on the CH1 measurement channel, and select AC coupling mode in the options that pop up at the bottom of the screen. Press the "Measure" button in the Wave Inspector button area, select "Add Measurement" in the options that pop up at the bottom of the screen, select "1" in the "Source" item, select "Frequency" in the "Measurement Type" item, and select "OK to add measurement".

[0151] Press “Run / Stop” to start the test, wait for the ultrasonic power supply frequency sweep to be completed, then read and record the measured frequency on the screen. This frequency is the frequency f of the electrical signal input to the receiving unit 32.

[0152] Furthermore, in Example 1, the machining tools 20 used in both the first and second ultrasonic machining devices were D6 flat-bottom milling cutters with a tool length of 20 mm. It should be noted that the above test method can also be performed using other machining tools 20 with corresponding tool lengths, such as a D4 tungsten steel rod with a tool length of 20 mm, or a D16 flat-bottom milling cutter with a tool length of 50 mm.

[0153] Example 2:

[0154] 13 to 17 , the difference between Example 2 and Example 1 is that: in In this embodiment 2, the end surface of the transmitting magnet 312 facing the receiving unit 32 is provided with a first wire embedding groove 312d wound around the blade body 1, and the transmitting coil 311 is accommodated in the first wire embedding groove 312d. Specifically, the transmitting magnet 312 in this embodiment 2 includes a connecting side plate 312e, a connecting top plate 312f and a connecting bottom plate 312g, wherein,

[0155] 14-17 , the connecting top plate 312 f is connected to the rear side of the connecting side plate 312 e. A top curved surface 3121 that mates with the receiving magnet 322 is provided on the end surface of the connecting top plate 312 f facing the receiving magnet 322. Furthermore, along the chord length direction of the top curved surface 3121, the chord length of the top curved surface 3121 is less than the length of the connecting top plate 312 f.

[0156] The connecting bottom plate 312g is connected to the front side of the connecting side plate 312e. A bottom curved surface 3122 is provided on the end surface of the connecting bottom plate 312g facing the receiving magnet 322, which mates with the receiving magnet 322. Along the chord length of the bottom curved surface 3122, the chord length of the bottom curved surface 3122 is shorter than the length of the connecting bottom plate 312g. The top curved surface 3121 and the bottom curved surface 3122 enable the transmitting magnet 312 to be wound around the periphery of the receiving magnet 322, bringing it closer to the receiving magnet 322.

[0157] A first buried wire groove 312d with an opening toward the receiving unit 32 is formed between the connecting side plate 312e, the connecting top plate 312f, and the connecting bottom plate 312g. The transmitting coil 311 is arranged around the connecting side plate 312e and partially buried in the first buried wire groove 312d. The length of the connecting side plate 312e is less than the length of the connecting top plate 312f, and the length of the connecting side plate 312e is less than the length of the connecting bottom plate 312g. When the transmitting coil 311 is wound on the connecting side plate 312e, the transmitting coil 311 is wrapped by the connecting top plate 312f and the connecting bottom plate 312g. Based on this structure, the magnetic flux lines generated by the transmitting coil 311 after power is applied are emitted from the front end surface of the connecting side plate 312e to the receiving magnet 322, and flow back from the rear end surface of the connecting side plate 312e after being transmitted by the receiving magnet 322.

[0158] The thickness of the connecting side plate 312e is A2 mm, the length of the connecting side plate 312e is H3 mm, and the thickness of the connecting top plate 312f is T 2a mm, the thickness of the connecting bottom plate 312g is T 2b The minimum width from the outermost edge of the emitting magnet 312 to the inner curved surface is B3 mm. The diameter of the top curved surface 3121 is D4 mm. The opening of the first cable embedding groove 312d extends axially along the blade body 1 for a length of B2 mm. The depth of the first cable embedding groove 312d is E2 mm. In this embodiment 2, the inner curved surfaces of the emitting magnet 312 are the top curved surface 3121 and the bottom curved surface 3122.

[0159] 7-8, the end surface of the receiving magnet 322 facing the transmitting unit 31 is provided with a second wire-embedding groove 322d arranged in an annular manner on the blade body 1, and the receiving coil 321 is accommodated in the second wire-embedding groove 322d. Specifically, the receiving magnet 322 in this embodiment 2 includes a second annular side plate 322a, a second annular top plate 322b and a second annular bottom plate 322c. The second annular top plate 322b is connected to the rear side of the second annular side plate 322a, and the second annular bottom plate 322c is connected to the front side of the second annular side plate 322a. A second wire-embedding groove 322d opening toward the transmitting unit 31 is formed between the second annular side plate 322a, the second annular top plate 322b and the second annular bottom plate 322c.

[0160] The thickness of the second annular top plate 322b is T 1a mm, the thickness of the second annular bottom plate 322c is T 1b mm, the inner diameter of the receiving magnet 322 is D1 mm, the outer diameter of the receiving magnet 322 is D3 mm, the inner diameter of the second wire-burying groove 322d is D2 mm, the length of the opening of the second wire-burying groove 322d extending axially along the blade body 1 is B1 mm, and the depth of the second wire-burying groove 322d is E1 mm.

[0161] In this embodiment 2, the relative magnetic permeabilities of the transmitting magnet 312 and the receiving magnet 322 are both u, the vacuum magnetic permeability is u0 Henry / m, and the magnetic circuit area of ​​the second annular side plate 322a is S1. The magnetic circuit area S1 satisfies:

[0162] The magnetic resistance R of the receiving unit 32 接收 The relationship with the above parameters is as follows: R 接收 =R1+R2+R3 (31)

[0163] In this embodiment 2, R1 is the magnetic resistance of the second annular side plate 322a, R2 is the magnetic resistance of the second annular top plate 322b, and R3 is the magnetic resistance of the second annular bottom plate 322c;

[0164] The magnetic resistance R of the transmitting unit 31 发射 The relationship with the above parameters is as follows: R 发射 =R4+R5+R6 (35)

[0165] In this embodiment 2, R4 is the magnetic resistance connected to the side plate 312e, R5 is the magnetic resistance connected to the top plate 312f, and R6 is the magnetic resistance connected to the bottom plate 312g;

[0166] The air gap magnetic resistance of the wireless transmission mechanism 3 is R δ Henry -1 , the width of the air gap is L mm, the air gap magnetic resistance R δ The relationship with the above parameters is as follows: R δ =K2×(R7+R8) (36)

[0167] Among them, R7 is the air gap magnetic resistance between the top plate 312f and the second annular top plate 322b, R8 is the air gap magnetic resistance between the bottom plate 312g and the second annular bottom plate 322c, K2 is the magnetic resistance correction coefficient, 0.2≤K2≤3.

[0168] When T 1a <T 2a , then T7=T 1a , if T 1a >T 2a , then T7=T 2a , when T 1b <T 2b , then T8=T 1b , if T 1b >T 2b , then T8=T2b , R7 and R8 satisfy the relationship:

[0169] Where m = 7 or 8, and F m is the marginal flux coefficient.

[0170] Parameters β and γ satisfy:

[0171] Parameters a, b, and c are used to describe the area of ​​the air gap between the connecting top plate 312f and the second annular top plate 322b, and the area of ​​the air gap between the connecting bottom plate 312g and the second annular bottom plate 322c. Specifically, a=2×k (41) b m =k×D3+T m (42)

[0172] The parameter k is used to describe the shape of the air gap between the connecting top plate 312f and the second annular top plate 322b and the air gap between the connecting bottom plate 312g and the second annular bottom plate 322c. Specifically,

[0173] If T 1a =T 2a , then T7=T 1a , if T 1b =T 2b , then T8=T 1b , R7 and R8 satisfy the relationship:

[0174] Wherein, m=7 or 8.

[0175] Based on the description of parameters a, b, c, and k, the shape and area of ​​the air gap between the connecting top plate 312f and the second annular top plate 322b, and the air gap between the connecting bottom plate 312g and the second annular bottom plate 322c can be expressed by equations (41) to (44). On this basis, according to equations (37) to (38) that introduce parameters a, b, c, and k, the air gap magnetic resistance between the connecting top plate 312f and the second annular top plate 322b, and the air gap magnetic resistance between the connecting bottom plate 312g and the second annular bottom plate 322c can be obtained.

[0176] The width L of the air gap is the distance between the transmitting unit 31 and the receiving unit 32. Preferably, 0.1≤L≤3. Specifically, in different embodiments, the width L of the air gap can be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.5 mm, 2 mm, 2.5 mm or 3 mm; preferably, the width L of the air gap is 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm.

[0177] The inductance of the transmitting unit 31 is L d发射 Henry, the inductance of the receiving unit 32 is L d接收 Henry, the number of turns of the transmitting coil 311 is N 发射 , the number of turns of the receiving coil 321 is N 接收 , the air gap magnetic resistance of the wireless transmission mechanism 3 is R δ Henry -1 , the magnetic resistance of the transmitting unit 31 is R 发射 Henry -1 , the magnetic resistance of the receiving unit 32 is R 接收 Henry -1 , then:

[0178] Where 2≤N 发射 ≤240, 2≤N 接收 ≤240.

[0179] Furthermore, based on the above structure of the ultrasonic machining device 10 disclosed in this embodiment 2, the frequency of the electrical signal input to the receiving unit 32 is f Hz, and the peak current of the transmitting unit 31 is I 发射 The peak current of the receiving unit 32 is I 接收 The apparent power of the transmitting unit 31 is Q 发射 volt-ampere, the apparent power of the receiving unit 32 is Q 接 收 Volt-ampere, then the above parameters satisfy the relationship:

[0180] Substituting the above equations (47) and (48) into equations (49) and (50), respectively, we can obtain the apparent power Q of the transmitting unit 31 in this embodiment 2. 发射 The relationship between the above parameters and the apparent power of the receiving unit 32 is Q 接 收 The relationship with the above parameters is:

[0181] It should be noted that, since some of the parameters in the relationships (27)-(52) need to be measured by the ultrasonic machining device 10, in order to avoid errors in the measurement data, K1 is set. K1 is a correction coefficient, 0.5≤K1≤1.5, which is used to correct the human errors in the data measurement process, resulting in errors between the apparent power of the transmitting unit 31 and the receiving unit 32 and the optimal apparent power, such as the measurement error of the frequency of the electrical signal input to the receiving unit, the measurement error of the peak current, etc. The measurement error of the frequency of the electrical signal is generally 15%, and the measurement error of the peak current is 20%. Therefore, it can be understood that when there is no error in the measurement parameters, preferably, K1=1.

[0182] Specifically, to verify that when the structural parameters of the receiving unit 32 and the transmitting unit 31 of the ultrasonic machining device 10 provided in Example 2 of the present invention satisfy the above-mentioned relationship, that is, when the structural parameters of the receiving unit 32 and the transmitting unit 31 match the peak current supplied and the apparent power possessed, the receiving unit 32 and the transmitting unit 31 of Example 2 of the present invention can have a lower temperature rise rate under working conditions compared to the existing ultrasonic machining device 10, and the machining tool 20 has an amplitude increase range that is substantially consistent with the increase range of the apparent power, two sets of tests were conducted, as shown in the following table:

[0183] In Table 3A and Table 3B, the third ultrasonic machining device is tested based on the structure of the ultrasonic machining device 10, and the apparent power Q of the transmitting unit 31 is obtained by combining the relations (27)-(52): 5发射 , and the apparent power Q of the receiving unit 32 5接收 :

[0184] Combined with the correction coefficient K1, we get Q 5发射 , Q 5接收 The setting range is set, and after the third ultrasonic machining device is supplied with current, the apparent power Q of the transmitting unit 31 is measured. 6发射 , the receiving unit 32 has an apparent power Q 6接收 After working for a preset time t under the conditions of the third ultrasonic machining device, the temperature rise measurement result of the working state within the preset time is obtained, and Q 6发 射 In Q 5发射 Within the setting range, Q 6接收 In Q 5接收 Within the setting range, specifically, 0.5≤K1≤1.5.

[0185] At the same time, referring to Table 4A and Table 4B, a fourth ultrasonic machining device is set. Based on the structure of the transmitting unit 31 and the receiving unit 32 of the fourth ultrasonic machining device, according to the relations (27)-(52), the apparent power Q of the transmitting unit 31 of the fourth ultrasonic machining device is obtained. 7发射 , and the apparent power Q of the receiving unit 32 7接收 :

[0186] Combined with the correction coefficient K1, we get Q 7发射 , Q 7接收 setting range.

[0187] After the fourth ultrasonic machining device is supplied with current, the apparent power Q of the transmitting unit 31 is measured. 8发射 , the receiving unit 32 has an apparent power Q 8接收 After working for a preset time t under the conditions of the fourth ultrasonic machining device, the temperature rise measurement result of the working state within the preset time is obtained. At this time, Q 8发射 Not in Q 7发射 Within the setting range, Q 8接收 Not in Q 7接收 within the setting range.

[0188] The test method is:

[0189] The ambient temperature is 24°C. The air gap width L between the transmitting unit 31 and the receiving unit 32 of the third and fourth ultrasonic processing devices is set to 0.2 mm. The transmitting unit 31 is connected to the ultrasonic generator, and the receiving unit 32 is connected to the ultrasonic transducer 2. The receiving unit 32 and the transmitting unit 31 are connected to the Yokogawa power oscilloscope to respectively collect the peak current I 发射 , I 接收 and apparent power Q 发射 , Q 接收 The frequency f of the electrical signal input to the receiving unit 32 is detected by a Tektronix oscilloscope.

[0190] Table 3A

[0191] Table 3B

[0192] Table 4A

[0193] Table 4B

[0194] It should be noted that Tables 3A and 3B are the temperature rise data of the receiving unit 32 and the transmitting unit 31, and the amplitude data of the processing tool 20 connected thereto, of the third ultrasonic processing device designed in accordance with the above-mentioned relational formulas (51) and (52) of the present invention, at a preset ambient temperature, when different peak currents are respectively passed through and the working time is continuously set to 10 minutes; Tables 4A and 4B are the temperature rise data of the receiving unit 32 and the transmitting unit 31, and the amplitude data of the processing tool 20 connected thereto, of the fourth ultrasonic processing device designed in accordance with the above-mentioned relational formulas (51) and (52) of the present invention, at a preset ambient temperature, when different currents are respectively passed through and the working time is continuously set to 10 minutes.

[0195] It can be seen from Table 3A and Table 3B that when the structural parameters of the transmitting unit 31 and the receiving unit 32 match the frequency of the electrical signal input to the receiving unit 32, that is, when the ultrasonic machining device has a structure that satisfies the relationship formula (51) and the relationship formula (52) of the present invention, the structural parameters and performance of the transmitting unit 31 and the receiving unit 32 can cooperate with the peak current and the apparent power supplied, so that during the operation of the ultrasonic machining device, the energy of the wireless transmission mechanism 3 is better converted into mechanical vibration, the transmission efficiency of the wireless transmission mechanism 3 in the working state is improved, the temperature rise rate of the wireless transmission mechanism 3 in the working state is reduced, and the stability of the continuous operation of the equipment is improved; further, the increase in the amplitude of the machining tool 20 installed on the cutter body 1 can be basically consistent with the increase in the apparent power of the wireless transmission mechanism 3, which can help avoid the conversion of energy into heat consumption and enable the wireless transmission mechanism 3 to operate at a higher energy conversion rate.

[0196] It can be seen from Table 4A and Table 4B that when the structural parameters of the transmitting unit 31 and the receiving unit 32 do not match the frequency of the electrical signal input to the receiving unit 32, that is, when the transmitting unit 31 and the receiving unit 32 of the fourth ultrasonic machining device do not satisfy the structure of the relationship formula (51) and the relationship formula (52) of the present invention, during the operation of this type of fourth ultrasonic machining device, the energy of its wireless transmission mechanism 3 will have a higher proportion of heat energy consumption, resulting in the temperature rise rate of this type of fourth ultrasonic machining device being significantly higher than that of the third ultrasonic machining device in Table 1A and Table 1B, and the amplitude generated by the machining tool 20 of this type of fourth ultrasonic machining device has a large increase amplitude and a large difference from the increase amplitude of the apparent power, resulting in that when the apparent power of this type of fourth ultrasonic machining device increases, the amplitude change of the machining tool 20 lags and changes less, and the overall energy conversion rate of the wireless transmission mechanism 3 is low.

[0197] It should be noted that in this second embodiment, the transmitting magnet 312 and the receiving magnet 322 of the third and fourth ultrasonic machining devices are both made of manganese-zinc ferrite, whose relative magnetic permeability u is 2500. In other embodiments, the transmitting magnet 312 can be made of any one of ferrite, neodymium iron boron, high-frequency ceramic materials, powder metallurgy materials, amorphous and nanocrystalline alloys, and cobalt iron; and the receiving magnet 322 can be made of any one of ferrite, neodymium iron boron, high-frequency ceramic materials, powder metallurgy materials, amorphous and nanocrystalline alloys, and cobalt iron. Based on the aforementioned relationship, the relative magnetic permeability u of the corresponding material can be introduced according to the materials used to prepare the transmitting magnet 312 and the receiving magnet 322.

[0198] It should be noted that in this embodiment 2, the apparent power Q in the third ultrasonic machining device and the fourth ultrasonic machining device is 6发射 , Q 6接收 , Q 8发射 , Q 8接收 , the peak current I 发射 , I 接收 , are measured by a Yokogawa power oscilloscope (model: PX8000), and the measurement method is as described in Example 1; in the third ultrasonic machining device and the fourth ultrasonic machining device, the frequency f of the electrical signal input to the receiving unit 32 is measured by a Tektronix oscilloscope (model: MDO3204), and the measurement method is as described in Example 1.

[0199] Furthermore, in Example 2, the machining tools 20 used in both the third and fourth ultrasonic machining devices were D6 flat-bottom milling cutters with a tool length of 20 mm. It should be noted that the above test method can also be performed using other machining tools 20 with corresponding tool lengths, such as a D4 tungsten steel rod with a tool length of 20 mm, or a D16 flat-bottom milling cutter with a tool length of 50 mm.

[0200] Example 3

[0201] 1-16 , based on the ultrasonic machining device 10 of the above-mentioned embodiment 1 or embodiment 2, this embodiment 3 provides an ultrasonic spindle 100, specifically, including a first rotation output unit 110, a machining tool 20 and the ultrasonic machining device 10 of embodiment 1 or embodiment 2.

[0202] Specifically, referring to Figures 1-12, this third embodiment is described in detail based on the ultrasonic machining device 10 of Example 1. The outer periphery of the blade body 1 extends radially outward to form a first stopper 12, and the rear end surface of the receiving unit 32 abuts the front end surface of the first stopper 12. A second stopper 35 is connected to the front end surface of the receiving unit 32. The second stopper 35 is arranged around the blade body 1, thereby forming a second receiving groove 34 for accommodating the receiving unit 32 between the first stopper 12 and the second stopper 35. When the receiving unit 32 is installed and sleeved on the outer periphery of the blade body 1, the receiving magnet 322 abuts the second stopper 35, thereby defining the relative position of the receiving magnet 322 and the blade body 1. This ensures that the weight distribution of the blade body 1 in the axial direction, with the receiving unit 32 installed, meets design specifications, thereby improving the operational stability of the ultrasonic machining device 10 during machining.

[0203] In this third embodiment, a locking ring 111 is connected to the front end of the first rotation output unit 110. This locking ring 111 is connected to a launching bracket 33 via a spacer 112. The launching bracket 33 is disposed around the outer circumference of the blade body 1. A first receiving groove 331 is defined on the end surface of the launching bracket 33 facing the blade body 1. The launching magnet 312 is received within the first receiving groove 331. In other embodiments, a bracket can be externally mounted on other equipment, with the launching bracket 33 connected and integrally formed with the bracket. The specific assembly structure is not further described here.

[0204] Specifically, referring to Figures 1 and 2, the rear end of the blade body 1 in this embodiment is used to connect to the first rotation output unit 110, and the front end is provided with an installation cavity 11 for accommodating the ultrasonic transducer 2. The ultrasonic transducer 2 is arranged in the installation cavity 11 and is electrically connected to the receiving unit 32.

[0205] The ultrasonic transducer 2 in this embodiment 3 includes a piezoelectric vibrator 21, a screw 22, and a back cover 23, wherein the ultrasonic machining device 10 in this embodiment also includes a variable amplitude rod 24, so that the screw 22 is arranged in the mounting cavity 11 and extends along the axial direction of the blade body 1, the rear end of the variable amplitude rod 24 extends into the mounting cavity 11 and is fixedly connected to the screw 22, the piezoelectric vibrator 21 is sleeved on the outer peripheral side of the screw 22, and the rear end face of the variable amplitude rod 24 protrudes from the outer peripheral surface of the screw 22 along the radial direction of the screw 22 and forms a top surface, so that when the back cover 23 is inserted into the screw 22 from the rear end of the screw 22 and is threadedly connected to the screw 22, it can cooperate with the top surface to limit the position of the piezoelectric vibrator 21 relative to the screw 22.

[0206] Preferably, the horn 24 and the screw 22 in this embodiment 3 are integrally formed, thereby improving the overall strength of the horn 24 and the screw 22 , and being able to stably and longer-term output vibration of a preset frequency under the action of the piezoelectric vibrator 21 .

[0207] 3 , in order to achieve the fixation of the machining tool 20 and the horn 24, the ultrasonic machining device 10 in this embodiment 3 further includes a collet 5 and a nut 6, wherein the front end of the horn 24 is provided with a socket 241 extending toward the rear end, and the collet 5 can be sleeved on the outer periphery of the machining tool 20 and inserted into the socket 241 together with the machining tool 20. Specifically, the inner axial surface of the socket 241 in this embodiment 3 is tapered with a diameter gradually decreasing from front to back, and the collet 5 has a tapered cylinder section 51 that cooperates with the tapered socket 241. When the collet 5 and the processing tool 20 are inserted into the socket 241, the inner circumference of the socket 241 can press against the collet 5, causing the collet 5 to deform and clamp the processing tool 20. Furthermore, in order to make the processing tool 20 inserted into the preset position of the socket 241 and fixed relative to the amplitude rod 24, the nut 6 is inserted into the outer circumference of the collet 5 and the nut 6 is threadedly connected to the amplitude rod 24. At this time, the nut 6 can press against the front end of the collet 5 to prevent the collet 5 from moving forward, so that the processing tool 20 can be stably assembled on the amplitude rod 24.

[0208] Further, referring to Figure 12, the collet 5 in this embodiment 3 includes a conical cylinder section 51 adapted to the socket, and the collet 5 has a plurality of first deformation grooves 52 spaced apart along its circumference. Specifically, the plurality of first deformation grooves 52 are evenly distributed along the circumference of the collet 5, so that its deformation is evenly distributed along the circumference. The first deformation grooves 52 extend to or extend through the conical cylinder section 51. In this way, when the collet 5 is pushed into the socket, a certain amount of deformation can be generated through the first deformation grooves 52, thereby deforming and clamping the processing tool. At the same time, when the characteristics of the material itself are expressed, the collet 5 can be deformed and reset after being disassembled from the amplitude rod 24 for reuse.

[0209] Among them, the first deformation groove 52 connects the outer side surface and the inner side surface of the collet 5. The first deformation groove 52 extends from the front end surface of the collet 5 along the axial direction of the collet 5, backward through the conical cylinder section 51 and extends to the rear end surface of the collet 5. The rear groove surface of the first deformation groove 52 and the rear end surface of the collet 5 have a first gap 54. Specifically, the width of the first gap 54 is greater than zero, so that the collet 5 has sufficient deformation ability and can have a certain strength for clamping the processing tool.

[0210] Furthermore, the collet 5 has a plurality of second deformation grooves 53 spaced apart along its circumference. The second deformation grooves 53 extend to or through the conical cylinder section 51. The second deformation grooves 53 are spaced apart from the first deformation grooves 52 and are arranged alternately. Specifically, there is a second deformation groove 53 between any two adjacent first deformation grooves 52, so that the collet 5 is subjected to uniform force during deformation.

[0211] In this embodiment 3, a second gap 55 is formed between the front groove surface of the second deformation groove 53 and the front end surface of the collet 5 , and a rear groove surface of the second deformation groove 53 is flush with the rear end surface of the collet. The widths of the first gap 54 and the second gap 55 are both greater than zero.

[0212] Specifically, in different embodiments, the machining tool 20 may be a cutter head, a milling cutter, a grinding cutter or other tools.

[0213] Based on the above-mentioned ultrasonic spindle 100 , embodiment 3 of the present invention further provides an ultrasonic machine tool, which includes a machine tool body (not shown in the figure) and the above-mentioned ultrasonic spindle 100 , and the ultrasonic spindle 100 is installed on the machine tool body.

[0214] Example 4:

[0215] 18 and 19 , based on the ultrasonic machining device 10 of the above-mentioned embodiment 1 or embodiment 2, this embodiment 4 provides an ultrasonic drill 200, including a housing 210, a second rotation output unit 220, a machining tool 20, a bearing 230, and the ultrasonic machining device 10, wherein:

[0216] The front end face of the shell 210 is provided with a rearward extending accommodating cavity 211, the rear end of the blade body 1 is accommodated in the accommodating cavity 211 and is connected to the output end of the second rotation output unit 220, and the blade body 1 is connected to the shell 210 through a bearing 230. The ultrasonic machining device 10 is arranged in the accommodating cavity 211 and is connected to the shell 210. Specifically, the machining tool 20 is connected to the ultrasonic transducer 2 through the amplitude rod 24.

[0217] Specifically, in this embodiment 4, the ultrasonic machining device 10 includes a blade body 1, an ultrasonic transducer 2 and a wireless transmission mechanism 3. The rear end of the blade body 1 is assembled on the second rotation output unit 220 and rotates synchronously with the second rotation output unit 220. The wireless transmission mechanism 3 is arranged on the outer peripheral side of the blade body 1.

[0218] The wireless transmission mechanism 3 in this embodiment 4 includes a transmitting unit 31 and a receiving unit 32. Specifically, the transmitting unit 31 is in the shape of a full circle or a non-full circle arranged around the outer circumference of the blade body 1. It can be understood that the angle of the transmitting magnet 312 around the outer circumference of the blade body 1 is θ. Preferably, Specifically, θ is the central angle corresponding to the circumferential extension of the transmitting coil 311 along the blade body 1 .

[0219] Specifically, in this embodiment 4, the second rotation output unit 220 further includes an extended gripping handle 221 , and the housing 210 is fixedly connected to the second rotation output unit 220 , thereby stabilizing the relative positions of the ultrasonic machining device 10 and the second rotation output unit 220 .

[0220] This specification discloses the invention with reference to the accompanying drawings and also enables those skilled in the art to practice the invention, including making and using any device or system, employing suitable materials, and using any combined methods. The scope of the invention is defined by the claimed technical solutions and includes other examples that occur to those skilled in the art. As long as such other examples include structural elements that are not different from the literal language of the claimed technical solutions, or such other examples contain equivalent structural elements that are not substantially different from the literal language of the claimed technical solutions, such other examples should be deemed to be within the scope of protection determined by the claimed technical solutions.

Claims

1. An inner and outer ring ultrasonic machining device, characterized in that: include: A blade body, wherein an ultrasonic transducer is provided in the blade body; a wireless transmission mechanism, the wireless transmission mechanism comprising a transmitting unit and a receiving unit, the receiving unit being disposed on the outer peripheral side of the blade body, the transmitting unit being disposed on the outer peripheral side of the receiving unit, the transmitting unit and the receiving unit being disposed opposite to each other and separated by an air gap; the transmitting unit comprising a transmitting coil and a transmitting magnet for generating a magnetic field based on current in the transmitting coil, the receiving unit comprising a receiving coil and a receiving magnet for receiving the magnetic field generated by the transmitting unit, and an ultrasonic transducer, the ultrasonic transducer being electrically connected to the receiving unit; The frequency of the electrical signal input to the receiving unit is f Hz, and the air gap magnetic resistance of the wireless transmission mechanism is R δ Henry -1 , the magnetic resistance of the transmitting unit is R 发射 Henry -1 , the magnetic resistance of the receiving unit is R 接收 Henry -1 , And the number of turns of the transmitting coil is N 发射 , the apparent power of the transmitting unit is Q 发射 volt-ampere, the peak current passed into the emission unit is I 发射 If , the above parameters satisfy the relationship: The number of turns of the receiving coil is N 接收 , the apparent power of the receiving unit is Q 接收 volt-ampere, the peak current passed into the receiving unit is I 接收 If , the above parameters satisfy the relationship: Where 2≤N 发射 ≤240, 2≤N 接收 ≤240, K1 is the correction coefficient, 0.5≤K1≤1.

5.

2. The inner and outer ring ultrasonic machining device according to claim 1, characterized in that: The angle of the launch unit around the outer circumference of the blade body is θ radians, 3. The inner and outer ring ultrasonic machining device according to claim 2, characterized in that: When θ=2π, the end surface of the transmitting magnet facing the receiving unit is provided with a first wire-embedded groove wound around the blade body, the transmitting coil is accommodated in the first wire-embedded groove, the transmitting magnet includes a first annular side plate, a first annular top plate and a first annular bottom plate, the first annular top plate is connected to the rear side of the first annular side plate, the first annular bottom plate is connected to the front side of the first annular side plate, and the first annular side plate, the first annular top plate and the first annular bottom plate form the first wire-embedded groove opening toward the receiving unit; wherein the thickness of the first annular top plate is T 2a mm, the thickness of the first annular bottom plate is T 2b mm, the inner diameter of the emitting magnet is D4 mm, the outer diameter of the emitting magnet is D6 mm, the length of the opening of the first buried wire groove extending along the axial direction of the blade body is B2 mm, the depth of the first buried wire groove is E2 mm, and the diameter of the first buried wire groove is D5 mm; The end surface of the receiving magnet facing the transmitting unit is provided with a second wire-embedding groove arranged in an annular manner on the blade body, the receiving coil is accommodated in the second wire-embedding groove, the receiving magnet includes a second annular side plate, a second annular top plate and a second annular bottom plate, the second annular top plate is connected to the rear side of the second annular side plate, the second annular bottom plate is connected to the front side of the second annular side plate, and the second annular side plate, the second annular top plate and the second annular bottom plate form the second wire-embedding groove with an opening toward the transmitting unit; wherein the thickness of the second annular top plate is T 1a mm, the thickness of the second annular bottom plate is T 1b mm, the inner diameter of the receiving magnet is D1 mm, the outer diameter of the receiving magnet is D3 mm, the inner diameter of the second wire-burying groove is D2 mm, the length of the opening of the second wire-burying groove extending along the axial direction of the blade body is B1 mm, and the depth of the second wire-burying groove is E1 mm; The relative magnetic permeabilities of the transmitting magnet and the receiving magnet are both u, the vacuum magnetic permeability is u0 Henry / m, the magnetic circuit area of ​​the second annular side plate is S1, and the magnetic circuit area S1 satisfies: The magnetic resistance R of the receiving unit 接收 The relationship with the above parameters is as follows: R 接收 =R1+R2+R3 Wherein, R1 is the magnetic resistance of the second annular side plate, R2 is the magnetic resistance of the second annular top plate, and R3 is the magnetic resistance of the second annular bottom plate; The magnetic resistance R of the transmitting unit 发射 The relationship with the above parameters is as follows: R 发射 =R4+R5+R6 Among them, R4 is the magnetic resistance of the first annular side plate, R5 is the magnetic resistance of the first annular top plate, and R6 is the magnetic resistance of the first annular bottom plate.

4. The inner and outer ring ultrasonic machining device according to claim 3, characterized in that: The width of the air gap is L mm; the air gap magnetic resistance R δ Satisfies: R δ =K2×(R7+R8) Wherein, R7 is the air gap magnetic resistance between the first annular top plate and the second annular top plate, R8 is the air gap magnetic resistance between the first annular bottom plate and the second annular bottom plate, K2 is the magnetic resistance correction coefficient, 0.2≤K2≤3; based on the structural parameters of the transmitting magnet and the receiving magnet, When T 1a <T 2a , then T7=T 1a , if T 1a >T 2a , then T7=T 2a , when T 1b <T 2b , then T8=T 1b , if T 1b >T 2b , then T8=T 2b , R7 and R8 satisfy the relationship: Where m = 7 or 8, and the parameters β, γ, and a satisfy: a=2×k b m =k×D3+T m If T 1a =T 2a , then T7=T 1a , if T 1b =T 2b , then T8=T 1b , R7 and R8 satisfy the relationship:

5. The inner and outer ring ultrasonic machining device according to claim 2, characterized in that: when When, the end surface of the transmitting magnet facing the receiving unit is provided with a first wire-embedded groove wound around the blade body, the transmitting coil is accommodated in the first wire-embedded groove, the transmitting magnet includes a connecting side plate, a connecting top plate and a connecting bottom plate, the connecting top plate is connected to the rear side of the connecting side plate, and the end surface of the connecting top plate facing the receiving unit is provided with a top arc surface that fits with the receiving unit; the connecting bottom plate is connected to the front side of the connecting side plate, and the end surface of the connecting bottom plate facing the receiving unit is provided with a bottom arc surface that fits with the receiving unit; the first wire-embedded groove with an opening facing the receiving unit is formed between the connecting side plate, the connecting top plate and the connecting bottom plate; The thickness of the connecting side plate is A2 mm, the length of the connecting side plate is H3 mm, and the thickness of the connecting top plate is T 2a mm, the thickness of the connecting base plate is T 2b mm, the minimum width from the outermost edge of the emitting magnet to the inner arc surface is B3 mm, the inner diameter of the emitting magnet is D4 mm, the length of the opening of the first buried wire groove extending along the axial direction of the blade body is B2 mm, and the depth of the first buried wire groove is E2 mm; The end surface of the receiving magnet facing the transmitting unit is provided with a second wire-embedding groove arranged in an annular manner on the blade body, the receiving coil is accommodated in the second wire-embedding groove, the receiving magnet comprises a second annular side plate, a second annular top plate and a second annular bottom plate, the second annular top plate is connected to the rear side of the second annular side plate, the second annular bottom plate is connected to the front side of the second annular side plate, and the second annular side plate, the second annular top plate and the second annular bottom plate form the second wire-embedding groove with an opening facing the transmitting unit; Wherein, the thickness of the second annular top plate is T 1a mm, the thickness of the second annular bottom plate is T 1b mm, the inner diameter of the receiving magnet is D1 mm, the outer diameter of the receiving magnet is D3 mm, the inner diameter of the second wire-burying groove is D2 mm, the length of the opening of the second wire-burying groove extending along the axial direction of the blade body is B1 mm, and the depth of the second wire-burying groove is E1 mm; The relative magnetic permeabilities of the transmitting magnet and the receiving magnet are both u, the vacuum magnetic permeability is u0 Henry / m, the magnetic circuit area of ​​the second annular side plate is S1, and the magnetic circuit area S1 satisfies: The magnetic resistance R of the receiving unit 接收 The relationship with the above parameters is as follows: R 接收 =R1+R2+R3 Among them, R1 is the magnetic resistance of the second annular side plate, R2 is the magnetic resistance of the second annular top plate, and R3 is the magnetic resistance of the second annular bottom plate; the magnetic resistance R of the transmitting unit 发射 The relationship with the above parameters is as follows: R 发射 =R4+R5+R6 Among them, R4 is the magnetic resistance connected to the side plate, R5 is the magnetic resistance connected to the top plate, and R6 is the magnetic resistance connected to the bottom plate.

6. The inner and outer ring ultrasonic machining device according to claim 5, characterized in that: The width of the air gap is L mm, and the air gap magnetic resistance R δ Satisfies: R δ =K2×(R7+R8) Wherein, R7 is the air gap magnetic resistance between the connecting top plate and the second annular top plate, R8 is the air gap magnetic resistance between the connecting bottom plate and the second annular bottom plate, K2 is the magnetic resistance correction coefficient, 0.2≤K2≤3, Based on the structural parameters of the transmitting magnet and the receiving magnet, When T 1a <T 2a , then T7=T 1a , if T 1a >T 2a , then T7=T 2a , when T 1b <T 2b , then T8=T 1b , if T 1b >T 2b , then T8=T 2b , R7 and R8 satisfy the relationship: Where m = 7 or 8, and the parameters β, γ, and a satisfy: a=2×k b m =k×D3+T m If T 1a =T 2a , then T7=T 1a , if T 1b =T 2b , then T8=T 1b , R7 and R8 satisfy the relationship:

7. The inner and outer ring ultrasonic machining device according to any one of claims 1 to 6, characterized in that: The width of the air gap is L mm, 0.1≤L≤3.

8. The inner and outer ring ultrasonic machining device according to any one of claims 1 to 6, characterized in that: The outer periphery of the blade body extends radially outward to form a first limit block, the rear end face of the receiving unit abuts against the front end face of the first limit block, the front end face of the receiving unit is connected to a second limit block, the second limit block is arranged around the blade body, and a second accommodating groove for accommodating the receiving unit is formed between the first limit block and the second limit block.

9. The inner and outer ring ultrasonic machining device according to any one of claims 1 to 6, characterized in that: The wireless transmission mechanism includes a transmitting frame, which is arranged on the outer peripheral side of the blade body. A first receiving groove is formed on one end surface of the transmitting frame facing the blade body, and the transmitting magnet is received in the first receiving groove.

10. The inner and outer ring ultrasonic machining device according to any one of claims 1 to 6, characterized in that: The blade body is provided with a mounting cavity, and the ultrasonic transducer is arranged in the mounting cavity.

11. The inner and outer ring ultrasonic machining device according to any one of claims 1 to 6, characterized in that: It also includes a variable amplitude rod, and the ultrasonic transducer includes a piezoelectric vibrator, a screw and a back cover. The screw is arranged in the blade body and extends along the axial direction of the blade body. The rear end of the variable amplitude rod is fixedly connected to the screw, and the piezoelectric vibrator is sleeved on the screw. The back cover is threadedly connected to the screw and cooperates with the rear end surface of the variable amplitude rod to limit the piezoelectric vibrator.

12. The inner and outer ring ultrasonic machining device according to claim 11, characterized in that: It also includes a collet and a nut sleeved on the outer periphery of the processing tool. The front end of the amplitude change rod is provided with a socket extending toward the rear end. The inner circumference of the socket is tapered with a diameter gradually decreasing from front to back. The collet can be inserted into the socket in conjunction with the processing tool. The nut can be threadedly connected to the amplitude change rod and press against the collet to lock the processing tool.

13. The inner and outer ring ultrasonic machining device according to claim 12, characterized in that: The collet comprises a conical cylinder section adapted to the insertion hole, and the collet has a plurality of first deformation grooves spaced apart along its circumference, wherein the first deformation grooves extend to or extend through the conical cylinder section; The first deformation groove connects the outer side surface and the inner side surface of the collet. The first deformation groove penetrates the conical cylinder section backward along the axial direction of the collet from the front end surface of the collet and extends toward the rear end surface of the collet. There is a first gap between the rear groove surface of the first deformation groove and the rear end surface of the collet.

14. The inner and outer ring ultrasonic machining device according to claim 13, characterized in that: The collet has a plurality of second deformation grooves spaced apart along its circumference, the second deformation grooves extending to or extending through the conical cylinder section, and the second deformation grooves are spaced apart from and staggered with the first deformation grooves; A front groove surface of the second deformation groove has a second interval with the front end surface of the collet, and a rear groove surface of the second deformation groove is flush with the rear end surface of the collet.

15. The inner and outer ring ultrasonic machining device according to any one of claims 1 to 6, characterized in that: The transmitting magnet is made of any one of ferrite, neodymium iron boron, high-frequency ceramic material, powder metallurgy material, amorphous and nanocrystalline alloy, and cobalt iron; the receiving magnet is made of any one of ferrite, neodymium iron boron, high-frequency ceramic material, powder metallurgy material, amorphous and nanocrystalline alloy, and cobalt iron.

16. Ultrasonic spindle, characterized in that It comprises a first rotation output unit and the inner and outer ring ultrasonic machining device according to any one of claims 1 to 15, wherein the rear end of the cutter body is assembled on the first rotation output unit.

17. Ultrasonic machine tool, characterized in that It comprises a machine tool body and the ultrasonic spindle according to claim 16, wherein the ultrasonic spindle is mounted on the machine tool body.

18. Ultrasonic drill, characterized in that It includes a shell, a second rotary output unit, a machining tool, a bearing and the inner and outer ring ultrasonic machining device according to any one of claims 1 to 6, the front end face of the shell is provided with a rearwardly extending accommodating cavity, the rear end of the tool body is accommodated in the accommodating cavity and is connected to the output end of the second rotary output unit, and the tool body is connected to the shell through the bearing, the inner and outer ring ultrasonic machining device is arranged in the accommodating cavity and is connected to the shell, and the machining tool is connected to the ultrasonic transducer.

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