Non-contact energy transmission rotary ultrasonic machining system with bilateral compensation network

Abstract

The invention relates to a non-contact energy transmission rotary ultrasonic machining system with a bilateral compensation network, which comprises an HSK cutter handle, an ultrasonic vibrator, a non-contact energy transmission device, a cutter and the compensation network, and a flange plate is arranged outside the HSK cutter handle; the non-contact energy transmission device comprises an ultrasonic generator, a hoop, a connecting plate, a primary side mounting seat, a primary side magnetic core, a primary side coil, a secondary side mounting seat, a secondary side magnetic core and a secondary side coil, and the primary side mounting seat and the secondary side mounting seat are coaxially arranged; the compensation network comprises a primary side compensation network and a secondary side compensation network, the primary side compensation network is connected between the ultrasonic generator and the primary side coil, and the secondary side compensation network is connected between the secondary side coil and the piezoelectric transducer and fixed to the flange plate. The secondary side compensation network is integrated in the rotary ultrasonic machining knife handle, so that the rotary ultrasonic machining system provides higher energy transmission efficiency and electroacoustic conversion efficiency of an ultrasonic vibrator on the basis of traditional single-side compensation.

Description

Technical Field

[0001] The invention belongs to the technical field of ultrasonic machining, and in particular relates to a non-contact energy transmission rotary ultrasonic machining system with a bilateral compensation network. Background Art

[0002] With the continuous development of aviation, aerospace and high-end manufacturing industries, microwave-absorbing honeycomb composite materials have attracted widespread attention due to their light weight, high strength, high temperature resistance, corrosion resistance and electromagnetic shielding performance. However, the unique honeycomb structure and microwave-absorbing coating characteristics of these materials make them prone to defects such as delamination and tearing during processing, and traditional mechanical processing methods are difficult to meet the requirements of high-precision processing. Rotary ultrasonic processing technology can effectively reduce cutting force and processing temperature by introducing high-frequency ultrasonic vibration, thereby significantly improving the processing accuracy and efficiency of such materials.

[0003] In rotary ultrasonic machining, energy transmission methods are generally divided into contact energy transmission and non-contact energy transmission. Non-contact energy transmission technology has the advantages of no physical contact, no wear, high speed and high reliability, and is widely used in rotary ultrasonic machining.

[0004] In order to improve the energy transmission efficiency and ensure the stable operation of the system, it is necessary to introduce a compensation network to match the impedance of the rotary ultrasonic machining system. The compensation network design methods for rotary ultrasonic machining systems mainly include unilateral compensation and bilateral compensation. Unilateral compensation achieves the primary tuning state by setting compensation elements in the primary loop, while the secondary loop relies on the inductive reactance of the secondary coil and the reactance of the ultrasonic vibrator to cancel each other out to achieve secondary resonance. However, this method is only applicable to a specific combination of ultrasonic vibrators and loosely coupled transformers, and cannot adapt to scenarios such as tool replacement and load changes. Bilateral compensation achieves independent tuning of the primary and secondary loops by introducing compensation elements in each loop. Bilateral compensation can not only improve the power factor and energy transmission efficiency of the system, but also optimize the impedance characteristics of the ultrasonic vibrator. More importantly, bilateral compensation can adapt to load changes and changes in ultrasonic vibrator parameters, and is particularly suitable for scenarios requiring high precision and multi-process processing.

[0005] However, bilateral compensation also faces many challenges in rotary ultrasonic machining. Since the secondary compensation network is located on the rotating side, it needs to be integrated into the rotary ultrasonic toolholder during design. In addition, to ensure the stability of the toolholder during high-speed rotation, special consideration must be given to the dynamic balance design. In actual machining, different materials have different physical and chemical properties, so the tool needs to be selected and replaced according to the machining requirements. Differences in the material and geometry of the tool will directly affect the impedance characteristics of the ultrasonic vibrator. Therefore, when replacing the tool, the compensation element must be adjusted synchronously to achieve impedance matching of the system. Summary of the invention

[0006] Based on the above-mentioned shortcomings and deficiencies in the prior art, one of the objects of the present invention is to at least solve one or more of the above-mentioned problems in the prior art. In other words, one of the objects of the present invention is to provide a non-contact energy transmission rotary ultrasonic machining system with a bilateral compensation network that meets one or more of the above-mentioned needs.

[0007] In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical solutions:

[0008] A non-contact energy transmission rotary ultrasonic machining system with a bilateral compensation network comprises an HSK tool holder, an ultrasonic vibrator, a non-contact energy transmission device, a tool and a compensation network, wherein the HSK tool holder has a circular cavity, the ultrasonic vibrator is fixedly installed in the circular cavity, the ultrasonic vibrator comprises a coaxially connected piezoelectric transducer and a horn, the bottom of the horn is coaxially fixedly installed with the tool; a flange is arranged outside the HSK tool holder;

[0009] The contactless energy transmission device comprises an ultrasonic generator, a clamp, a connecting plate, a primary side mounting seat, a primary side magnetic core, a primary side coil, a secondary side mounting seat, a secondary side magnetic core and a secondary side coil, wherein the primary side magnetic core and the primary side coil are packaged in a U-shaped groove of the primary side mounting seat, and the secondary side magnetic core and the secondary side coil are packaged in an annular groove of the secondary side mounting seat, the primary side mounting seat and the secondary side mounting seat are coaxially arranged, the notches are opposite, and an axial gap is provided between the two, the primary side mounting seat is fixedly connected to the clamp through the connecting plate, the clamp is used to clamp the machine tool bed, and the secondary side mounting seat is fixedly connected to the flange outside the HSK tool handle;

[0010] The compensation network includes a primary compensation network and a secondary compensation network. The primary compensation network is connected between the ultrasonic generator and the primary coil, and the secondary compensation network is connected between the secondary coil and the piezoelectric transducer and is fixed to a flange outside the HSK tool handle.

[0011] As a preferred solution, the primary magnetic core is a fan-shaped ring structure, the central angle range is 90° to 120°, and the lower end surface is provided with a U-shaped groove extending in the circumferential direction; the primary mounting seat is provided with a U-shaped groove matching the shape of the primary magnetic core, and the groove depth is greater than the height of the primary magnetic core;

[0012] The secondary magnetic core and the secondary mounting seat are both annular structures, and their upper end faces are both provided with annular grooves. The size of the annular groove of the secondary mounting seat matches the shape of the secondary magnetic core. During packaging, the directions of the notches of each magnetic core and the corresponding notches of the mounting seat are kept consistent.

[0013] As a preferred solution, the primary coil is wound in a manner that the Litz wire is wound back and forth along the bottom wall of the U-shaped groove of the primary magnetic core to the upper end surface of the primary magnetic core;

[0014] The secondary coil is reciprocatingly wound along the inner side wall of the annular groove of the secondary magnetic core.

[0015] As a preferred solution, the primary compensation network is composed of a primary adjustable capacitor module connected in series with the primary coil, the primary adjustable capacitor module includes a primary PCB board, a knob switch, a plurality of screw terminals, a plurality of 3.3nF small capacitors and a primary fixed value large capacitor, the screw terminals, the 3.3nF small capacitor and the primary fixed value large capacitor are fixed on the primary PCB board, the first electrode of the primary fixed value large capacitor is electrically connected to the output end of the ultrasonic generator, the second electrode is electrically connected to the same end of the primary coil, and the other end of the primary coil is electrically connected to the ground end of the ultrasonic generator; the knob switch is electrically connected to the primary PCB board through the screw terminal, and the knob switch is provided with a plurality of gears, each gear controlling a different number of 3.3nF small capacitors and the primary fixed value large capacitor The parallel connection state.

[0016] As a preferred solution, the target value of the primary adjustable capacitance module is determined by: calculating the primary compensation capacitance value required for the primary loop to reach a resonant state according to the series resonant frequency of the ultrasonic vibrator and the self-inductance of the primary coil when the target tool is assembled, and using the value as the target value for the primary adjustable capacitance module under the target tool to achieve resonance matching;

[0017] The nominal value of the primary fixed large capacitor is determined by combining the primary compensation capacitor value variation range corresponding to different tools and selecting a capacitance value lower than the lower limit of the primary compensation capacitor value variation range as the nominal value of the primary fixed large capacitor.

[0018] As a preferred solution, the secondary side compensation network is composed of a secondary side adjustable capacitor module connected in series with the secondary side coil; the secondary side adjustable capacitor module includes a secondary side PCB board, a PCB mounting seat, a secondary side fixed value large capacitor, a plurality of 4.7nF small capacitors, two screw terminals and a dial switch, the secondary side PCB board is a circular ring structure, the fixed value large capacitor and the dial switch are arranged along the tangent direction of the secondary side PCB board and symmetrically arranged along the central axis; the screw terminals are arranged symmetrically along the radial direction; the 4.7nF small capacitor is evenly divided into two groups, each group of capacitor elements is evenly distributed along the radial direction, and the two groups of capacitor elements are symmetrically arranged along the central axis; the PCB mounting seat is a circular ring structure and is provided with an annular groove, the PCB mounting seat is fixed to a flange outside the HSK tool handle, and the secondary side PCB board is fixed in the annular groove of the PCB mounting seat.

[0019] As a preferred solution, the first electrode of the secondary side fixed large capacitor is electrically connected to the same-name end of the secondary coil, the second electrode is electrically connected to the positive electrode of the piezoelectric transducer, and the negative electrode of the piezoelectric transducer is electrically connected to the other end of the secondary coil; the dip switch is provided with a number of switch positions, each position controls the parallel connection of a 4.7nF small capacitor and a fixed large capacitor.

[0020] As a preferred solution, the target value of the secondary adjustable capacitance module is determined by: calculating the secondary compensation capacitance value required for the secondary loop to reach a resonant state according to the reactance of the ultrasonic vibrator at the series resonant frequency and the inductive reactance of the secondary coil when assembling the target tool, and using the value as the target value for the secondary adjustable capacitance module under the target tool to achieve resonant matching;

[0021] The nominal capacitance value of the secondary side constant large capacitor is determined by combining the secondary side compensation capacitance value variation range corresponding to different tools and selecting a capacitance value lower than the lower limit of the primary side compensation capacitance value variation range as the nominal value of the secondary side constant large capacitor.

[0022] As a preferred solution, silicone potting glue is used to encapsulate the electrical components on the secondary PCB board.

[0023] As a preferred solution, the secondary side mounting seat, the secondary side magnetic core, the flange and the PCB mounting seat are provided with through holes of the same size and aligned along the axial direction, so as to realize the electrical connection between the secondary side coil and the secondary side compensation network;

[0024] The inner circumferential wall of the annular groove of the PCB mounting seat is provided with wire through holes corresponding to the radial through holes of the HSK tool handle, so as to realize the electrical connection between the secondary side compensation network and the piezoelectric transducer.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] (1) The secondary side compensation network of the present invention is integrated into the rotary ultrasonic machining tool holder, so that the rotary ultrasonic machining system provides higher energy transmission efficiency and electroacoustic conversion efficiency of the ultrasonic vibrator on the basis of traditional unilateral compensation. In addition, the secondary side compensation network is combined with dynamic balancing design and anti-falling measures to ensure the stability and reliability of the rotary ultrasonic tool holder in high-speed rotation;

[0027] (2) The present invention adopts the HSK tool holder widely used in the industry to ensure compatibility with common high-speed machining centers. By designing a fan-shaped primary magnetic core with a central angle range of 90° to 120°, the interference between the tool change arm and the rotating ultrasonic tool holder is avoided, and compatibility with the automatic tool change system of the machining center is achieved, which can effectively improve the machining efficiency and enhance the degree of automation;

[0028] (3) The primary and secondary circuits of the present invention are both equipped with adjustable capacitor modules, which can manually adjust the output value of the compensation capacitor according to the changes in the impedance characteristics of the primary and secondary circuits after tool replacement, without the need to disassemble and replace the capacitor. This design simplifies the impedance matching process, improves the system's ability to adapt to different tools and working conditions, and effectively reduces maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1is a structural schematic diagram of a non-contact energy transmission rotary ultrasonic machining system with a bilateral compensation network according to an embodiment of the present invention;

[0030] Figure 2 is an internal cross-sectional view of a rotary ultrasonic knife handle according to an embodiment of the present invention;

[0031] Figure 3 is a schematic structural diagram of a primary PCB board according to an embodiment of the present invention;

[0032] Figure 4 is a schematic structural diagram of a PCB mounting base according to an embodiment of the present invention;

[0033] Figure 5 is a schematic structural diagram of a secondary PCB board according to an embodiment of the present invention;

[0034] In the figure: 1-ultrasonic generator, 2-primary compensation network, 3-hoop, 4-connecting plate, 5-primary mounting seat, 6-primary magnetic core, 7-primary coil, 8-HSK63 handle housing, 9-secondary mounting seat, 10-secondary magnetic core, 11-secondary coil, 12-secondary compensation network, 13-piezoelectric transducer, 14-amplifier, 15-tool, 16-countersunk screw, 17-double-headed stud, 21-primary PCB board, 22-knob switch, 23-screw terminal, 24-3 .3nF small capacitor, 25-primary side fixed value large capacitor, 81-handle flange, 82-radial through hole, 83-handle shell internal thread, 121-PCB mounting seat, 1211-positioning column, 1212-support cylindrical seat, 1213-screw column, 1214-wire through hole, 122-secondary side PCB board, 1221-positioning hole, 1222-bolt hole, 123-secondary side fixed value large capacitor, 124-4.7nF small capacitor, 125-dip switch, 141-amplifier external thread. DETAILED DESCRIPTION

[0035] In order to more clearly illustrate the embodiments of the present invention, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other accompanying drawings and other implementation methods can be obtained based on these accompanying drawings without creative work.

[0036] like Figure 1 As shown, the non-contact energy transmission rotary ultrasonic machining system with a bilateral compensation network according to an embodiment of the present invention comprises a housing 8 of an HSK63 tool holder, an ultrasonic vibrator, a non-contact energy transmission device, a tool 15 and a compensation network.

[0037] like Figure 2As shown, the upper end of the housing 8 of the HSK63 tool holder is a standard joint compatible with the machine tool spindle, a circular cavity is arranged inside it, and a positioning annular surface and an internal thread 83 matching the positioning cylindrical seat are arranged in an area at a certain depth from the edge of the cavity, and the outer circumferential wall of the housing 8 of the tool holder is provided with a flange 81 and a radial through hole 82.

[0038] Specifically, the ultrasonic vibrator includes a piezoelectric transducer 13 and a transformer 14, which are fastened together by threads. A mounting portion is provided at the node of the transformer, and the mounting portion is a positioning cylindrical seat arranged on the outer circumference of the transformer, and an external thread 141 is provided on its outer cylindrical surface. The transformer is positioned by the axial positioning surface of the positioning cylindrical seat and the positioning annular surface of the shell of the tool handle, and is fixed by the external thread 141 and the internal thread 83 of the shell of the tool handle.

[0039] The cutter 15 is a disc-shaped cutter, which is designed to be integrally formed with a circular cutter and a thread, and is fixedly connected to a threaded hole at the output end of the amplitude transformer through the thread.

[0040] The contactless energy transmission device comprises an ultrasonic generator 1, a clamp 3, a connecting plate 4, a primary mounting seat 5, a primary magnetic core 6, a primary coil 7, a secondary mounting seat 9, a secondary magnetic core 10 and a secondary coil 11. The primary magnetic core 6 is a fan-ring structure with a central angle ranging from π / 2 to 2π / 3 degrees, and a U-shaped groove extending in the circumferential direction is provided on the lower end face; the primary mounting seat 5 is provided with a U-shaped groove matching the shape of the primary magnetic core 6, and the groove depth is greater than the height of the primary magnetic core 6, so as to ensure that the primary magnetic core 6 and the primary coil 7 are completely embedded in the primary mounting seat 5; the secondary magnetic core 10 and the secondary mounting seat 9 are both circular ring structures, and their upper end faces are both provided with annular grooves, and the size of the annular groove of the secondary mounting seat 9 matches the shape of the secondary magnetic core 10; the primary magnetic core 6 and the primary coil 7, the secondary magnetic core 10 and the secondary coil 11 are respectively encapsulated in the primary seat 4 and the secondary seat 8 with epoxy resin, and the direction of the magnetic core notch is kept consistent with the direction of the mounting seat notch during encapsulation.

[0041] The primary side mounting seat 5 is fixedly connected to the connecting plate 4 by screws, the connecting plate 4 is fixedly connected to the clamp 3 by screws, and the clamp 3 realizes the static fixation of the primary side components by clamping the machine tool bed; the secondary side mounting seat 9 is fixedly connected to the tool handle flange 81 by countersunk screws 16, thereby ensuring its synchronous rotation with the ultrasonic tool handle; the primary side magnetic core 6 and the secondary side magnetic core 10 are coaxially arranged with the notches facing each other, and an axial gap of 1-2mm is set between the two, and the size of the gap can be adjusted by adjusting the fixed position of the clamp 3 on the machine tool.

[0042] The compensation network includes a primary compensation network 2 and a secondary compensation network 12. The primary compensation network 2 is located between the ultrasonic generator 1 and the primary coil 7 and is composed of a primary adjustable capacitor module connected in series with the primary coil. Figure 3As shown, the primary adjustable capacitor module includes a primary printed circuit board (hereinafter referred to as the primary PCB board) 21, a knob switch 22, 7 screw terminals 23, 10 3.3nF small capacitors 24 and a primary fixed value large capacitor 25. The first electrode of the primary fixed value large capacitor 25 is electrically connected to the output end of the ultrasonic generator 1, the second electrode is electrically connected to the same end of the primary coil 7, and the other end of the primary coil 7 is electrically connected to the ground end of the ultrasonic generator 1, so as to realize the primary fixed value large capacitor 25 and the primary coil 7 in series. The knob switch 22 is provided with 10 gears, which are connected to the screw terminals 23 through wires, and then connected to the primary PCB board 21 circuit. Each gear controls the parallel connection state of different numbers of 3.3nF small capacitors 24 and the primary fixed value large capacitor 25. By selecting different gears, an additional adjustable range of 0-33nF can be provided on the basis of the nominal capacitance value of the primary fixed value large capacitor 25.

[0043] The nominal capacitance value of the primary fixed large capacitor 25 and the target value of the primary adjustable capacitance module are determined as follows: based on the series resonant frequency of the ultrasonic vibrator and the self-inductance of the primary coil 7 when assembling a certain tool, the primary compensation capacitance value required to make the primary circuit reach a resonant state is calculated, and this value is used as the target value for the primary adjustable capacitance module under the tool to achieve resonant matching; combined with the range of variation of the primary compensation capacitance value corresponding to different tools, a capacitance value slightly lower than the lower limit of the range is selected as the nominal value of the primary fixed large capacitor 25.

[0044] The secondary compensation network 12 is composed of a secondary adjustable capacitor module connected in series with the secondary coil 11, and the secondary adjustable capacitor module includes a secondary printed circuit board (hereinafter referred to as the secondary PCB board) 122, a PCB mounting seat 121, a secondary fixed value large capacitor 123, 10 4.7nF small capacitors 124, 2 screw terminals and a DIP switch 125. Figure 4 As shown, the PCB mounting seat 121 is a circular ring structure, made of insulating material, such as ABS. An annular groove is provided on its upper end surface, and a positioning column 1211 and a screw column 1213 are provided in the groove. The bottom of the positioning column 1211 is provided with a supporting cylindrical seat 901, which is used to stabilize the positioning column and support the secondary PCB board; the bottom of the screw column 1213 is provided with a cross reinforcement rib to enhance its structural strength; the PCB mounting seat 121 is fixedly connected to the handle flange 81 through a stud 17. Specifically, one end of the stud 17 is screwed into the threaded hole of the handle flange 81, and the other end passes through the positioning column 1211 of the PCB mounting seat 121, and is fastened by a gasket and a nut, thereby achieving a stable and reliable connection, while facilitating fixing and disassembly.

[0045] like Figure 5As shown, the secondary PCB board 122 is a circular ring structure, using an insulating substrate suitable for the installation of electronic components, such as FR4 material, and laying out an electrical connection circuit. The secondary PCB board 122 is provided with a bolt hole 186 and a limit hole 185, and the positioning column 1211 cooperates with the limit hole 185 to achieve positioning. The bolt passes through the bolt hole 186 and the screw column 1213 of the PCB mounting seat 121, and cooperates with the nut embedded in the mounting seat to ensure that the secondary PCB 122 is firmly fixed. In order to prevent the electrical components from falling off during rotation, potting glue is used to further fix them. Preferably, silicone potting glue is selected.

[0046] The secondary side fixed value large capacitor 123 and the dip switch 125 are arranged along the tangent direction of the secondary side PCB board 122, and are arranged with the central axis of the secondary side PCB board 122 as the symmetry axis; the two screw type terminals are symmetrically arranged along the radial direction of the secondary side PCB122; the 10 4.7nF small capacitors 124 are divided into two groups, each group contains 5 capacitor elements, and the capacitor elements of each group are evenly distributed along the radial direction and are symmetrically arranged relative to the central axis of the secondary side PCB122.

[0047] The first electrode of the secondary side fixed value large capacitor 123 is electrically connected to the same end of the secondary side coil 11 through a screw terminal, the second electrode is electrically connected to the positive electrode of the piezoelectric transducer 13 through another screw terminal, and the negative electrode of the piezoelectric transducer 13 is electrically connected to the other end of the secondary side coil 11, so that the secondary side fixed value large capacitor 123 is connected in series with the secondary side coil 11. The code switch 125 is provided with 10 gears, each gear is used to control a 4.7nF small capacitor 124 and the parallel connection of the secondary side fixed value large capacitor 123. By combining different gears, an additional adjustable range of 0-47nF can be provided on the basis of the nominal capacitance value of the secondary side fixed value large capacitor.

[0048] The nominal capacitance value of the secondary fixed large capacitor 123 and the target value of the secondary adjustable capacitance module are determined as follows: based on the reactance of the ultrasonic vibrator at the series resonant frequency and the inductive reactance of the secondary coil 11 when assembling a certain tool, the secondary compensation capacitance value required to make the secondary circuit reach a resonant state is calculated, and this value is used as the target value for the secondary adjustable capacitance module under the tool to achieve resonant matching; combined with the range of variation of the secondary compensation capacitance value corresponding to different tools, a capacitance value slightly lower than the lower limit of the range is selected as the nominal value of the secondary fixed large capacitor 123.

[0049] The secondary mounting seat 9, the secondary magnetic core 10, the tool handle flange 81 and the PCB mounting seat 121 are provided with through holes of the same size and aligned in the axial direction, which are used to realize the electrical connection between the secondary coil 11 and the secondary compensation network 12. The inner circumferential wall of the annular groove of the PCB mounting seat 121 is provided with a wire through hole 1214 corresponding to the radial through hole 82 of the tool handle shell, so that the secondary compensation network and the piezoelectric transducer can be electrically connected.

[0050] The working principle of the entire rotary ultrasonic machining system of the embodiment of the present invention is as follows:

[0051] After the tool is replaced, the knob switch 22 and the dial switch 125 are adjusted according to the calculated target values ​​of the primary and secondary compensation capacitors; then, the ultrasonic generator 1 transmits a high-frequency AC signal to the primary coil 7 through the primary adjustable capacitor module, so that the primary coil 7 generates an alternating magnetic field; this magnetic field acts on the secondary coil 11 through electromagnetic induction, and induces a voltage signal corresponding to the current change of the primary coil 7; then, the secondary coil 11 transmits the induced voltage signal to the piezoelectric transducer 13 through the secondary adjustable capacitor module, and the transducer 13 converts the electrical signal into mechanical vibrations; these vibrations are amplified by the amplitude of the amplitude rod 14, and then drive the tool 15 to perform precision machining, thereby achieving high-precision machining of the workpiece.

[0052] The above description is only a detailed description of the preferred embodiments and principles of the present invention. For ordinary technicians in this field, according to the ideas provided by the present invention, there will be changes in the specific implementation methods, and these changes should also be regarded as the protection scope of the present invention.

Claims

1. A non-contact energy transmission rotary ultrasonic machining system with a bilateral compensation network, characterized in that: It includes an HSK tool handle, an ultrasonic vibrator, a non-contact energy transmission device, a tool and a compensation network. The HSK tool handle has a circular cavity. The ultrasonic vibrator is fixedly installed in the circular cavity. The ultrasonic vibrator includes a coaxially connected piezoelectric transducer and a horn. The bottom of the horn is coaxially fixedly installed with a tool. A flange is provided outside the HSK tool handle. The contactless energy transmission device comprises an ultrasonic generator, a clamp, a connecting plate, a primary side mounting seat, a primary side magnetic core, a primary side coil, a secondary side mounting seat, a secondary side magnetic core and a secondary side coil, wherein the primary side magnetic core and the primary side coil are packaged in a U-shaped groove of the primary side mounting seat, and the secondary side magnetic core and the secondary side coil are packaged in an annular groove of the secondary side mounting seat, the primary side mounting seat and the secondary side mounting seat are coaxially arranged, the notches are opposite, and an axial gap is provided between the two, the primary side mounting seat is fixedly connected to the clamp through the connecting plate, the clamp is used to clamp the machine tool bed, and the secondary side mounting seat is fixedly connected to the flange outside the HSK tool handle; The compensation network includes a primary compensation network and a secondary compensation network. The primary compensation network is connected between the ultrasonic generator and the primary coil, and the secondary compensation network is connected between the secondary coil and the piezoelectric transducer and is fixed to a flange outside the HSK tool handle.

2. The non-contact energy transmission rotary ultrasonic machining system with a bilateral compensation network according to claim 1, characterized in that: The primary magnetic core is a fan-shaped ring structure, with a central angle ranging from 90° to 120°, and a U-shaped groove extending in the circumferential direction is provided on the lower end surface; the primary mounting seat is provided with a U-shaped groove matching the shape of the primary magnetic core, and the groove depth is greater than the height of the primary magnetic core; The secondary magnetic core and the secondary mounting seat are both annular structures, and their upper end faces are both provided with annular grooves. The size of the annular groove of the secondary mounting seat matches the shape of the secondary magnetic core. During packaging, the directions of the notches of each magnetic core and the corresponding notches of the mounting seat are kept consistent.

3. The non-contact energy transmission rotary ultrasonic machining system with a bilateral compensation network according to claim 2, characterized in that: The primary coil is wound in a manner that the Litz wire is wound back and forth along the bottom wall of the U-shaped slot of the primary magnetic core to the upper end surface of the primary magnetic core; The secondary coil is reciprocatingly wound along the inner side wall of the annular groove of the secondary magnetic core.

4. The non-contact energy transmission rotary ultrasonic machining system with a bilateral compensation network according to any one of claims 1 to 3, characterized in that: The primary compensation network is composed of a primary adjustable capacitor module connected in series with the primary coil, the primary adjustable capacitor module includes a primary PCB board, a knob switch, a plurality of screw terminals, a plurality of 3.3nF small capacitors and a primary fixed value large capacitor, the screw terminals, the 3.3nF small capacitor and the primary fixed value large capacitor are fixed on the primary PCB board, the first electrode of the primary fixed value large capacitor is electrically connected to the output end of the ultrasonic generator, the second electrode is electrically connected to the same end of the primary coil, and the other end of the primary coil is electrically connected to the ground end of the ultrasonic generator; the knob switch is electrically connected to the primary PCB board through the screw terminal, the knob switch is provided with a plurality of gears, each gear controls the parallel connection state of a different number of 3.3nF small capacitors and the primary fixed value large capacitor.

5. The non-contact energy transmission rotary ultrasonic machining system with a bilateral compensation network according to claim 4, characterized in that: The target value of the primary adjustable capacitance module is determined by: calculating the primary compensation capacitance value required for the primary loop to reach a resonant state according to the series resonant frequency of the ultrasonic vibrator and the self-inductance of the primary coil when the target tool is assembled, and using the value as the target value for the primary adjustable capacitance module under the target tool to achieve resonance matching; The nominal value of the primary fixed large capacitor is determined by combining the primary compensation capacitor value variation range corresponding to different tools and selecting a capacitance value lower than the lower limit of the primary compensation capacitor value variation range as the nominal value of the primary fixed large capacitor.

6. The non-contact energy transmission rotary ultrasonic machining system with a bilateral compensation network according to any one of claims 1 to 3, characterized in that: The secondary side compensation network is composed of a secondary side adjustable capacitor module connected in series with the secondary side coil; the secondary side adjustable capacitor module includes a secondary side PCB board, a PCB mounting seat, a secondary side fixed value large capacitor, a plurality of 4.7nF small capacitors, two screw terminals and a dial switch, the secondary side PCB board is a circular ring structure, the fixed value large capacitor and the dial switch are arranged along the tangent direction of the secondary side PCB board and symmetrically arranged along the central axis; the screw terminals are symmetrically arranged along the radial direction; the 4.7nF small capacitor is evenly divided into two groups, each group of capacitor elements is evenly distributed along the radial direction, and the two groups of capacitor elements are symmetrically arranged along the central axis; the PCB mounting seat is a circular ring structure and is provided with an annular groove, the PCB mounting seat is fixed to a flange outside the HSK tool handle, and the secondary side PCB board is fixed in the annular groove of the PCB mounting seat.

7. The non-contact energy transmission rotary ultrasonic machining system with a bilateral compensation network according to claim 6, characterized in that: The first electrode of the secondary side fixed value large capacitor is electrically connected to the same-name end of the secondary side coil, the second electrode is electrically connected to the positive electrode of the piezoelectric transducer, and the negative electrode of the piezoelectric transducer is electrically connected to the other end of the secondary side coil; the dip switch is provided with a plurality of switch positions, each position controls the parallel connection of a 4.7nF small capacitor and a fixed value large capacitor.

8. The non-contact energy transmission rotary ultrasonic machining system with a bilateral compensation network according to claim 7, characterized in that: The target value of the secondary adjustable capacitance module is determined by calculating the secondary compensation capacitance value required for the secondary loop to reach a resonant state according to the reactance of the ultrasonic vibrator at the series resonant frequency and the inductive reactance of the secondary coil when the target tool is assembled, and using the value as the target value for the secondary adjustable capacitance module under the target tool to achieve resonant matching; The nominal capacitance value of the secondary side constant large capacitor is determined by combining the secondary side compensation capacitance value variation range corresponding to different tools and selecting a capacitance value lower than the lower limit of the primary side compensation capacitance value variation range as the nominal value of the secondary side constant large capacitor.

9. The non-contact energy transmission rotary ultrasonic machining system with a bilateral compensation network according to claim 6, characterized in that: Sample silicone potting glue to encapsulate the electrical components on the secondary PCB board.

10. The non-contact energy transmission rotary ultrasonic machining system with a bilateral compensation network according to claim 6, characterized in that: The secondary side mounting seat, the secondary side magnetic core, the flange and the PCB mounting seat are provided with through holes of the same size and aligned along the axial direction, so as to realize the electrical connection between the secondary side coil and the secondary side compensation network; The inner circumferential wall of the annular groove of the PCB mounting seat is provided with wire through holes corresponding to the radial through holes of the HSK tool handle, so as to realize the electrical connection between the secondary side compensation network and the piezoelectric transducer.

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