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

Abstract

The application relates to a non-contact energy transmission rotary ultrasonic machining system with a double-side compensation network, which comprises an HSK tool holder, an ultrasonic vibrator, a non-contact energy transmission device, a tool and a compensation network, and a flange is arranged outside the HSK tool holder; the non-contact energy transmission device comprises an ultrasonic generator, a clamp, a connecting plate, a primary side mounting base, a primary side magnetic core, a primary side coil, a secondary side mounting base, a secondary side magnetic core and a secondary side coil, and the primary side mounting base and the secondary side mounting base 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, the secondary side compensation network is connected between the secondary side coil and a piezoelectric transducer, and is fixed to the flange. The secondary side compensation network of the application is integrated in 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 the traditional single-side compensation.

Description

Technical Field

[0001] The present 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 continued development of aviation, aerospace, and high-end manufacturing, microwave-absorbing honeycomb composites are attracting widespread attention due to their lightweight, high-strength, high-temperature, corrosion-resistant, and electromagnetic shielding properties. However, the unique honeycomb structure and microwave-absorbing coating properties of these materials make them susceptible to defects such as delamination and tearing during processing, making traditional mechanical processing methods difficult to meet the requirements of high-precision machining. Rotary ultrasonic machining technology, by introducing high-frequency ultrasonic vibrations, can effectively reduce cutting forces and processing temperatures, thereby significantly improving the machining accuracy and efficiency of these 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 perform impedance matching on 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 circuit, while the secondary circuit 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 where tools are replaced or loads change. Bilateral compensation achieves independent tuning of the primary and secondary circuits by introducing compensation elements in each. 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. Because 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 dynamic balancing 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 changing the tool, the compensation element must also 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 includes an HSK tool holder, an ultrasonic vibrator, a non-contact energy transmission device, a tool, and a compensation network. The HSK tool holder has a circular cavity, and the ultrasonic vibrator is fixedly installed in the circular cavity. The ultrasonic vibrator includes a coaxially connected piezoelectric transducer and a horn, and the bottom of the horn is coaxially fixedly installed with the tool. A flange is provided on the outside of the HSK tool holder.

[0009] The contactless energy transmission device includes an ultrasonic generator, a clamp, a connecting plate, a primary mounting seat, a primary magnetic core, a primary coil, a secondary mounting seat, a secondary magnetic core and a secondary coil, the primary magnetic core and the primary coil are encapsulated in a U-shaped groove of the primary mounting seat, the secondary magnetic core and the secondary coil are encapsulated in an annular groove of the secondary mounting seat, the primary mounting seat and the secondary mounting seat are coaxially arranged, the notches are opposite, and an axial gap is provided between the two, the primary 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 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 embodiment, 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 along 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;

[0012] The secondary magnetic core and the secondary mounting seat are both circular structures, and their upper end surfaces are provided with an annular groove. The size of the annular groove of the secondary mounting seat matches the shape of the secondary magnetic core. During packaging, the direction of each core notch is kept consistent with the direction of the corresponding mounting seat notch.

[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 slot of the primary magnetic core to the upper end surface of the primary magnetic core;

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

[0015] As a preferred embodiment, 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, several screw terminals, several 3.3nF small capacitors and a primary fixed-value large capacitor. The screw terminals, 3.3nF small capacitors and the primary fixed-value large capacitor are fixed to 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-name end of the primary coil, and the other end of the primary coil is electrically connected to the ground terminal of the ultrasonic generator; the knob switch is electrically connected to the primary PCB board via the screw terminals. The knob switch has several gears, each gear controlling the parallel connection state of a different number of 3.3nF small capacitors and the primary fixed-value large capacitor.

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

[0017] The nominal value of the primary side fixed large capacitor is determined by combining the primary 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 primary side fixed large capacitor.

[0018] As a preferred embodiment, 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, several 4.7nF small capacitors, two screw terminals and a dip switch. The secondary side PCB board is a circular ring structure, the fixed value large capacitor and the dip 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 capacitors are evenly divided into two groups, each group of capacitor elements are 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 has 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 value 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 several switch positions, each position controls the parallel connection of a 4.7nF small capacitor and a fixed value large capacitor.

[0020] As a preferred solution, the target value of the secondary-side adjustable capacitance module is determined by calculating the secondary-side compensation capacitance value required to make the secondary-side loop reach a resonant state based on 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 this value as the target value for the secondary-side adjustable capacitance module under the target tool to achieve resonant matching;

[0021] The nominal capacitance value of the secondary side fixed 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 fixed 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 base, the secondary side magnetic core, the flange and the PCB mounting base 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, enabling the rotary ultrasonic machining system to provide 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-drop measures to ensure the stability and reliability of the rotary ultrasonic tool holder during 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 processing efficiency and enhance the degree of automation.

[0028] (3) Both the primary and secondary circuits of the present invention are equipped with adjustable capacitor modules. This module can manually adjust the output value of the compensation capacitor based on the changes in the impedance characteristics of the primary and secondary circuits after tool replacement, without the need to remove and replace the capacitors. 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 11 is a schematic structural 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 1 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 1 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-clamp, 4-connecting plate, 5-primary mounting seat, 6-primary magnetic core, 7-primary coil, 8-HSK63 tool holder housing, 9-secondary mounting seat, 10-secondary magnetic core, 11-secondary coil, 12-secondary compensation network, 13-piezoelectric transducer, 14-amplifier, 15-tool, 16-countsunk screw, 17-stud stud, 21-primary PCB board, 22-knob switch, 23-screw terminal block, 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-limiting hole, 1222-bolt hole, 123-secondary side fixed value large capacitor, 124-4.7nF small capacitor, 125-dip switch, 141-amplitude rod external thread. DETAILED DESCRIPTION

[0035] To more clearly illustrate the embodiments of the present invention, specific embodiments of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other embodiments can be obtained based on these drawings without inventive efforts.

[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 includes 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, and a circular cavity is provided inside it. A positioning annular surface and an internal thread 83 that cooperate with the positioning cylindrical seat are provided in an area at a certain depth from the edge of the cavity. 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 variable amplitude rod 14, which are fastened together by threads. A mounting portion is provided at the node of the variable amplitude rod, and the mounting portion is a positioning cylindrical seat provided on the outer circumference of the variable amplitude rod, and an external thread 141 is provided on its outer cylindrical surface. The variable amplitude rod is positioned by cooperating with 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 cooperating with the internal thread 83 of the shell of the tool handle through the external thread 141.

[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 the threaded hole at the output end of the amplitude transformer through the thread.

[0040] The contactless energy transmission device includes an ultrasonic generator 1, a clamp 3, a connecting plate 4, a primary side mounting seat 5, a primary side magnetic core 6, a primary side coil 7, a secondary side mounting seat 9, a secondary side magnetic core 10 and a secondary side 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 surface; 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 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 surfaces 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 with epoxy resin on the primary mounting seat 5 and the secondary mounting seat 9, and the direction of the 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, and the connecting plate 4 is fixedly connected to the clamp 3 by screws. 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 holder flange 81 by a countersunk screw 16, thereby ensuring its synchronous rotation with the ultrasonic tool holder; 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 1-2 mm is set between the two. 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 (PCB) 21, a rotary switch 22, seven screw terminals 23, ten 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 terminal of the ultrasonic generator 1, the second electrode is electrically connected to the same-name terminal of the primary coil 7, and the other end of the primary coil 7 is electrically connected to the ground terminal of the ultrasonic generator 1, thereby connecting the primary fixed-value large capacitor 25 and the primary coil 7 in series. The rotary switch 22 has ten positions and is connected to the screw terminals 23 via wires, and in turn to the primary PCB 21. Each position controls the parallel connection of a different number of 3.3nF small capacitors 24 and the primary fixed-value large capacitor 25. By selecting different positions, the primary fixed-value large capacitor 25 can be adjusted from 0 to 33nF in addition to the nominal capacitance value.

[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 value of the primary coil 7 when assembling a certain tool, the primary compensation capacitance value required to make the primary circuit reach the 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 primary compensation capacitance values ​​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. The secondary adjustable capacitor module includes a secondary printed circuit board (hereinafter referred to as the secondary PCB board) 122, a PCB mounting base 121, a secondary fixed value large capacitor 123, ten 4.7nF small capacitors 124, two 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 1212 for stabilizing the positioning column and supporting 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 and the tool handle flange 81 are fixedly connected by a stud 17. Specifically, one end of the stud 17 is screwed into the threaded hole of the tool 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 structure, using an insulating substrate suitable for mounting electronic components, such as FR4 material, and is provided with electrical connection circuits. The secondary PCB board 122 is provided with bolt holes 1222 and limit holes 1221, and the positioning column 1211 cooperates with the limit hole 1221 to achieve positioning. The bolt passes through the bolt hole 1222 and the screw column 1213 of the PCB mounting base 121, and cooperates with the nut embedded in the mounting base to ensure that the secondary PCB 122 is firmly fixed. To prevent the electrical components from falling off during rotation, potting compound is used for further fixation. Preferably, silicone potting compound is used.

[0046] The secondary-side fixed-value large capacitor 123 and the DIP switch 125 are arranged tangentially along the secondary PCB board 122 and are arranged symmetrically with the central axis of the secondary PCB board 122. The two screw terminals are arranged symmetrically along the radial direction of the secondary PCB 122. The ten 4.7nF small capacitors 124 are divided into two groups, each containing five capacitor elements. The capacitor elements in each group are evenly distributed along the radial direction and are arranged symmetrically with respect to the central axis of the secondary PCB 122.

[0047] The first electrode of the secondary-side fixed-value large capacitor 123 is electrically connected to the same-name end of the secondary coil 11 via a screw terminal, and the second electrode is electrically connected to the positive electrode of the piezoelectric transducer 13 via another screw terminal. The negative electrode of the piezoelectric transducer 13 is electrically connected to the other end of the secondary coil 11, thereby achieving the series connection of the secondary-side fixed-value large capacitor 123 and the secondary coil 11. The dip switch 125 is provided with 10 gears, each gear being used to control the parallel connection of a 4.7nF small capacitor 124 and 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-side fixed-value large capacitor 123 and the target value of the secondary-side 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-side compensation capacitance value required to make the secondary-side loop reach a resonant state is calculated, and this value is used as the target value for the secondary-side adjustable capacitance module under the tool to achieve resonant matching; combined with the range of variation of the secondary-side 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-side fixed-value large capacitor 123.

[0049] The secondary mounting base 9, secondary magnetic core 10, toolholder flange 81, and PCB mounting base 121 are provided with uniformly sized, axially aligned through-holes for electrically connecting the secondary coil 11 to the secondary compensation network 12. The inner circumferential wall of the annular groove in the PCB mounting base 121 is provided with wire vias 1214 corresponding to the radial through-holes 82 in the toolholder housing, facilitating electrical connection between the secondary compensation network and the piezoelectric transducer.

[0050] The working principle of the entire rotary ultrasonic machining system according to 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 capacitances; then, the ultrasonic generator 1 transmits a high-frequency AC signal to the primary coil 7 through the primary adjustable capacitance module, causing the primary coil 7 to generate an alternating magnetic field; this magnetic field acts on the secondary coil 11 through electromagnetic induction, inducing a voltage signal corresponding to the current change in the primary coil 7; then, the secondary coil 11 transmits the induced voltage signal to the piezoelectric transducer 13 through the secondary adjustable capacitance module, and the transducer 13 converts the electrical signal into mechanical vibrations; these vibrations are amplified in amplitude by 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, based on the ideas provided by the present invention, there may be changes in the specific implementation methods, and these changes should also be considered as the scope of protection of the present invention.

Claims

1. A non-contact energy transmission rotary ultrasonic machining system with a bilateral compensation network, characterized in that: The HSK tool holder includes an HSK tool holder, an ultrasonic vibrator, a non-contact energy transmission device, a tool, and a compensation network. The HSK tool holder has a circular cavity, and the ultrasonic vibrator is fixedly installed in the circular cavity. The ultrasonic vibrator includes a coaxially connected piezoelectric transducer and a horn, and the bottom of the horn is coaxially fixedly installed with the tool. A flange is provided outside the HSK tool holder. The contactless energy transmission device includes an ultrasonic generator, a clamp, a connecting plate, a primary mounting seat, a primary magnetic core, a primary coil, a secondary mounting seat, a secondary magnetic core and a secondary coil, the primary magnetic core and the primary coil are encapsulated in a U-shaped groove of the primary mounting seat, the secondary magnetic core and the secondary coil are encapsulated in an annular groove of the secondary mounting seat, the primary mounting seat and the secondary mounting seat are coaxially arranged, the notches are opposite, and an axial gap is provided between the two, the primary 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 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. The primary compensation network is composed of a primary adjustable capacitor module connected in series with the primary coil; The target value of the primary adjustable capacitance module is determined by calculating the primary compensation capacitance value required to achieve resonance of the primary loop based on the series resonant frequency of the ultrasonic transducer and the self-inductance of the primary coil when the target tool is assembled, and using this value as the target value for achieving resonance matching of the primary adjustable capacitance module under the target tool; The nominal value of the primary side fixed value large capacitor of the primary side adjustable capacitance module is determined by: combining the primary side compensation capacitance value variation range corresponding to different tools, selecting a capacitance value lower than the lower limit of the primary side compensation capacitance value variation range as the nominal value of the primary side fixed value large capacitor; The secondary side compensation network is composed of a secondary side adjustable capacitor module connected in series with the secondary side coil; The target value of the secondary-side adjustable capacitance module is determined by calculating the secondary-side compensation capacitance value required to achieve resonance of the secondary-side loop based on the reactance of the ultrasonic transducer at the series resonant frequency and the inductive reactance of the secondary coil when the target tool is assembled, and using this value as the target value for achieving resonance matching of the secondary-side adjustable capacitance module under the target tool; The nominal capacitance value of the secondary side fixed large capacitor of the secondary side adjustable capacitance module is determined as follows: based on the secondary side compensation capacitance value variation range corresponding to different tools, a capacitance value lower than the lower limit of the primary side compensation capacitance value variation range is selected as the nominal value of the secondary side fixed large capacitor.

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 along 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 circular structures, and their upper end surfaces are provided with an annular groove. The size of the annular groove of the secondary mounting seat matches the shape of the secondary magnetic core. During packaging, the direction of each core notch is kept consistent with the direction of the corresponding mounting seat notch.

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 wound back and forth 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 adjustable capacitor module includes a primary PCB board, a knob switch, several screw terminals, several 3.3nF small capacitors, and a primary fixed-value large capacitor. The screw terminals, 3.3nF small capacitors, and primary fixed-value large capacitor are fixed to 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-name end of the primary coil, and the other end of the primary coil is electrically connected to the ground terminal of the ultrasonic generator. The knob switch is electrically connected to the primary PCB board via the screw terminals. The knob switch has several gears, each gear controlling 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 any one of claims 1 to 3, characterized in that: The secondary-side adjustable capacitor module includes a secondary-side PCB board, a PCB mounting base, a secondary-side fixed-value large capacitor, several 4.7nF small capacitors, two screw-type terminals, and a DIP switch. The secondary-side PCB board has a circular ring structure. The fixed-value large capacitor and the DIP switch are arranged tangentially to the secondary-side PCB board and symmetrically along the central axis. The screw-type terminals are arranged symmetrically along the radial direction. The 4.7nF small capacitors are evenly divided into two groups, with the capacitor elements of each group evenly distributed along the radial direction, and the two groups of capacitor elements are symmetrically arranged along the central axis. The PCB mounting base has a circular ring structure and is provided with an annular groove. The PCB mounting base 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 base.

6. The non-contact energy transmission rotary ultrasonic machining system with a bilateral compensation network according to claim 5, 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 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 several switch positions, each position controls the parallel connection of a 4.7nF small capacitor and a fixed value large capacitor.

7. The non-contact energy transmission rotary ultrasonic machining system with a bilateral compensation network according to claim 5, characterized in that: Sample silicone potting compound is used to encapsulate electrical components on the secondary PCB board.

8. The non-contact energy transmission rotary ultrasonic machining system with a bilateral compensation network according to claim 5, characterized in that: The secondary side mounting base, the secondary side magnetic core, the flange and the PCB mounting base 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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