An ultramagnetic ultrasonic tool handle and a method for realizing amplitude control

Abstract

The application discloses a magnetostrictive ultrasonic tool holder and a method for realizing amplitude control. The method utilizes the inverse magnetostrictive effect of magnetostrictive material, and through a driving and self-sensing module arranged outside the magnetostrictive transducing material, the actual output amplitude of the system can be obtained in real time during processing without additional sensors or optical equipment. The method effectively overcomes the defects of relying on laser measurement and only being able to monitor no-load, and supports dynamic amplitude monitoring in the processing state. The magnetostrictive ultrasonic tool holder provided by the embodiment of the application has simple structure, is easy to implement, and can reflect the cutting state monitoring of the actual output state of the system in real time during processing, thereby improving the stability of the output of the ultrasonic processing system and the reliability of the processing process.

Description

Technical Field

[0001] This application relates to, but is not limited to, the field of ultrasonic processing technology, and particularly to a magnetostrictive ultrasonic tool holder and a method for achieving amplitude control. Background Technology

[0002] Ultrasonic machining is a machining method that applies periodically varying ultrasonic vibrations along a specific direction to the tool head during the machining process. By introducing ultrasonic vibrations, machining performance can be improved to a certain extent. Compared with traditional machining methods without ultrasonic vibrations, ultrasonic machining has significant advantages in several aspects, such as improving machining efficiency and accuracy, reducing cutting forces, and extending tool life.

[0003] Ultrasonic machining systems typically consist of an ultrasonic generator, a transducer, and corresponding mechanical transmission devices. The transducer, as the core component, primarily converts the electromagnetic energy generated by the ultrasonic generator into mechanical vibration energy. Common transducer materials include piezoelectric materials and giant magnetostrictive materials. Compared to piezoelectric materials, giant magnetostrictive materials offer advantages such as high energy density, high energy conversion efficiency, and fast response speed, enabling them to achieve greater ultrasonic power output and higher amplitude at the same driving power. Therefore, they have broad application prospects in high-performance ultrasonic machining systems. In actual machining processes, ultrasonic machining systems are often affected by external loads and temperature, leading to a decrease or deviation in the system's output amplitude, which in turn affects the cutting state and machining quality. To ensure the stability and machining effect of the system during processing, it is usually necessary to monitor the cutting state of the system in real time and dynamically adjust the ultrasonic amplitude based on the monitoring results to achieve stable amplitude control.

[0004] In related technologies, amplitude stabilization control methods mostly rely on model-based calculations, that is, calculating the current vibration state through system parameters and adjusting accordingly. The entire process lacks direct feedback on the actual output state of the system, thus limiting its control accuracy. Meanwhile, existing cutting condition monitoring methods mainly measure ultrasonic amplitude using laser displacement sensors under no-load conditions. However, in actual machining processes, there is a lack of detection means that can be used to measure the actual output state of the system in real time, making it difficult to accurately reflect the machining state.

[0005] Therefore, there is an urgent need for a cutting state monitoring method that is simple in structure, easy to implement, and can reflect the actual output state of the system in real time during the machining process. Combined with model calculation, this method can be used to improve the stability of the ultrasonic machining system output and the reliability of the machining process. Summary of the Invention

[0006] This application provides a super magnetostrictive ultrasonic tool holder and a method for amplitude control. The structure is simple, easy to implement, and can monitor the cutting state in real time to reflect the actual output state of the system during the machining process, thereby improving the stability of the ultrasonic machining system output and the reliability of the machining process.

[0007] This invention provides a magnetostrictive ultrasonic scalpel holder, comprising: a scalpel holder 1, a drive and self-sensing module 2, a magnetostrictive transducer material 3, an amplitude transformer 4, and an ultrasonic power supply 5; wherein, Tool holder 1, connected to the machine tool, is used to mount the super magnetostrictive ultrasonic tool holder onto the machine tool; The super magnetostrictive transducer 3 is used to convert electromagnetic energy into ultrasonic vibration under the action of an external excitation magnetic field; The amplitude transformer 4 is connected to the super magnetostrictive transducer 3 and is used to transmit the ultrasonic vibration converted by the super magnetostrictive transducer 3 to the cutting tool.

[0008] The drive and self-sensing module 2 is arranged coaxially with the giant magnetostrictive transducer material 3 through an external clamping device but does not contact it, and remains stationary during the rotational processing; the drive and self-sensing module 2 is connected to the ultrasonic power supply 5 to receive ultrasonic frequency electrical signals, convert electromagnetic energy into magnetic field, and form an excitation magnetic field outside the giant magnetostrictive transducer material 3. The ultrasonic power supply 5 serves as the energy source for the excitation magnetic field, used to generate and output ultrasonic frequency electrical signals to the drive and self-sensing module 2.

[0009] In one exemplary instance, the driving and self-sensing module 2 includes: an induction coil 6 and an excitation coil 7; wherein, The excitation coil 7 is electrically connected to the ultrasonic power supply 5 and is used to receive ultrasonic frequency electrical signals and convert the ultrasonic frequency electrical signals into an alternating magnetic field. The alternating magnetic field acts on the outside of the super magnetostrictive transducer 3 to form an excitation magnetic field. The induction coil 6 is coaxially disposed inside the excitation coil 7. By utilizing the inverse magnetostriction effect of the super magnetostrictive material, it outputs induced voltage and signal during the vibration of the super magnetostrictive transducer material 3. Thus, during the processing, the ultrasonic power supply 5 calculates and obtains the true ultrasonic amplitude of the system by collecting the induced voltage and signal generated by the induction coil 6.

[0010] In one exemplary instance, the drive and self-sensing module 2 includes a magnetic conductor 8 disposed outside the excitation coil 7 to form a closed magnetic circuit to improve sensing sensitivity.

[0011] In one exemplary instance, the material of the magnetic conductor 8 is a highly permeable material.

[0012] In one exemplary embodiment, the ultrasonic power supply 5 includes: an input terminal, a control section, and an output terminal; wherein, The input terminal is used to acquire the driving current flowing through the excitation coil 7, the voltage signal applied to it, and the induced voltage and signal output by the induction coil 6; and to output the acquired electrical signal data to the control section after analog-to-digital conversion. The control section is used to perform frequency tracking based on the acquired electrical signals, calculate the current actual amplitude, and dynamically adjust the driving parameters. The output terminal is used to output an ultrasonic frequency electrical signal to the excitation coil 7 in real time according to the driving parameters adjusted by the control section, so as to drive the super magnetostrictive transducer material 3.

[0013] In one exemplary instance, the input terminal is provided with three independent channels: The first channel is connected to the driving and self-sensing module 2 and is used to collect the driving current flowing through the excitation coil 7; The second channel is connected to the drive and self-sensing module 2 and is used to acquire the voltage signal applied to the excitation coil 7. The third channel is connected to the drive and self-sensing module 2 and to the output terminal of the induction coil 6, and is used to collect the induced voltage and signal output by the induction coil 6.

[0014] In one exemplary instance, the input terminal includes a Hall effect current sensor or a high-precision sampling resistor for implementing the sampling.

[0015] In one exemplary instance, the control section is used to: Based on the driving current flowing through the excitation coil 7 and the voltage signal applied to it, and the induced voltage and signal output by the induction coil 6, the current resonance state of the system is identified and frequency tracking is performed. The driving frequency is dynamically adjusted so that the system always works at or near the resonance point. The actual output amplitude of the system is calculated based on the relationship model between the induced voltage and the actual amplitude according to the induced voltage and signal. The actual amplitude is compared with the set target amplitude, and the amplitude of the driving voltage output to the excitation coil 7 is dynamically adjusted according to the deviation between them to achieve closed-loop stable control of the ultrasonic amplitude. The target amplitude is the target vibration amplitude determined by the system under no-load or initial calibration conditions, and is used as a reference value for real-time control.

[0016] In one exemplary instance, it also includes: The pre-tightening structure, including pre-tightening elements and pre-tightening bolts, is used to apply a pre-tightening force to the super magnetostrictive transducer material 3; An incomplete housing is provided to enclose the components of the supermagnetic ultrasonic scalpel handle and allow an external magnetic field to act on the supermagnetic transducer material 3.

[0017] This application embodiment also provides a method for achieving amplitude control, based on the supermagnetic ultrasonic scalpel holder described in any of the above claims; comprising: The control section of the ultrasonic power supply in the super magneto-ultrasonic scalpel handle sets its expected target amplitude according to the no-load state of the ultrasonic system. After the ultrasonic system starts processing, the drive electrical signal fed back by the ultrasonic system is collected, and the ultrasonic system is frequency tracked based on the collected electrical signal. The electrical signal fed back by the ultrasound system is collected, and the amplitude deviation value is obtained based on the collected induced electrical signal; Adjust the driving voltage value according to the amplitude deviation value; The process of collecting the electrical signal fed back by the ultrasound system and obtaining the amplitude deviation value based on the collected induced electrical signal continues until the resonance state of the ultrasound system and the amplitude of the ultrasound system are simultaneously stabilized.

[0018] The super-magnetic ultrasonic tool holder provided in this application embodiment utilizes the inverse magnetostrictive effect of super-magnetic materials. Through a drive and self-sensing module 2 located outside the super-magnetic transducer material 3, the actual output amplitude of the system can be acquired in real time during processing without the need for external sensors or optical equipment. This effectively overcomes the shortcomings of relying on laser measurement and only being able to monitor under no-load conditions, and supports dynamic amplitude monitoring during processing. The super-magnetic ultrasonic tool holder provided in this application embodiment has a simple structure, is easy to implement, and reflects the cutting state monitoring of the actual output state of the system in real time during processing, thereby improving the stability of the ultrasonic machining system output and the reliability of the machining process.

[0019] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0020] The accompanying drawings are used to provide a further understanding of the technical solutions of this application and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions of this application.

[0021] Figure 1 This is a schematic diagram of the composition and structure of the magneto-ultrasonic scalpel holder in the embodiments of this application; Figure 2 This is a schematic diagram of the composition structure of the drive and self-sensing module of the super-magnetic ultrasonic scalpel holder in the embodiments of this application; Figure 3 This is a schematic diagram of the working process of the ultrasonic power supply control system in the embodiments of this application; Figure 4 Based on the embodiments of this application Figure 1 The flowchart shown is a method for amplitude control in a magnetostrictive ultrasonic scalpel holder. Figure 5 This is a schematic diagram illustrating the implementation process of the amplitude control method in the embodiments of this application; Figure 6 This is a schematic diagram showing the relationship between induced voltage and actual amplitude in an embodiment of this application. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be arbitrarily combined with each other.

[0023] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0025] It is understood that the terms "first" and "second" used in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] It is understood that the term "connection" in the following embodiments should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have electrical signal or data transmission with each other.

[0027] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0028] The steps illustrated in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases the steps shown or described may be performed in a different order than that shown here.

[0029] Figure 1 This is a schematic diagram of the composition and structure of the magnetostrictive ultrasonic scalpel holder in an embodiment of this application, as shown below. Figure 1 As shown, it may include: a tool holder 1, a drive and self-sensing module 2, a magnetostrictive transducer 3, an amplitude transformer 4, and an ultrasonic power supply 5; wherein, Tool holder 1), connected to the machine tool, is used to mount the super magnetostrictive ultrasonic tool holder onto the machine tool; The super magnetostrictive transducer 3 is used to convert electromagnetic energy into ultrasonic vibration under the action of an external excitation magnetic field; The amplitude transformer 4 is connected to the super magnetostrictive transducer 3 and is used to transmit the ultrasonic vibration converted by the super magnetostrictive transducer 3 to the cutting tool.

[0030] The drive and self-sensing module 2 is arranged coaxially with the giant magnetostrictive transducer material 3 through an external clamping device but does not contact it, and remains stationary during the rotational processing; the drive and self-sensing module 2 is connected to the ultrasonic power supply 5 to receive ultrasonic frequency electrical signals, convert electromagnetic energy into magnetic field, and form an excitation magnetic field outside the giant magnetostrictive transducer material 3. The ultrasonic power supply 5 serves as the energy source for the excitation magnetic field, used to generate and output ultrasonic frequency electrical signals to the drive and self-sensing module 2.

[0031] The super-magnetic ultrasonic tool holder provided in this application embodiment utilizes the inverse magnetostrictive effect of super-magnetic materials. Through a drive and self-sensing module 2 located outside the super-magnetic transducer material 3, the actual output amplitude of the system can be acquired in real time during processing without the need for external sensors or optical equipment. This effectively overcomes the shortcomings of relying on laser measurement and only being able to monitor under no-load conditions, and supports dynamic amplitude monitoring during processing. The super-magnetic ultrasonic tool holder provided in this application embodiment has a simple structure, is easy to implement, and reflects the cutting state monitoring of the actual output state of the system in real time during processing, thereby improving the stability of the ultrasonic machining system output and the reliability of the machining process.

[0032] In one exemplary instance, such as Figure 2 As shown, the driving and self-sensing module 2 may include: an induction coil 6 and an excitation coil 7; wherein, The excitation coil 7 is electrically connected to the ultrasonic power supply 5 and is used to receive ultrasonic frequency electrical signals and convert the ultrasonic frequency electrical signals into an alternating magnetic field. The alternating magnetic field acts on the outside of the giant magnetostrictive transducer 3 to form an excitation magnetic field. The induction coil 6 is coaxially disposed inside the excitation coil 7. By utilizing the inverse magnetostriction effect of the giant magnetostrictive material, it outputs induced voltage and signal during the vibration of the giant magnetostrictive transducer material 3. Thus, during the processing, the ultrasonic power supply 5 calculates the true ultrasonic amplitude of the system by acquiring the induced voltage and signal generated by the induction coil 6.

[0033] Furthermore, such as Figure 2 As shown, the drive and self-sensing module 2 may also include: a magnetic conductor 8, disposed outside the excitation coil 7, for forming a closed magnetic circuit to improve sensing sensitivity.

[0034] In one embodiment, the material of the magnetic conductor 8 can be a high magnetic permeability material (such as an iron-nickel alloy or a soft magnetic alloy) to converge the magnetic field and form a magnetic circuit, thereby improving the response capability to vibration signals.

[0035] In one exemplary embodiment, the ultrasonic power supply 5 may include: an input terminal, a control section, and an output terminal; wherein, The input terminal is used to acquire the driving current flowing through the excitation coil 7, the voltage signal applied to it, and the induced voltage and signal output by the induction coil 6; and to output the acquired electrical signal data to the control section after analog-to-digital conversion. The control section is used to perform frequency tracking based on the acquired electrical signals, calculate the current actual amplitude, and dynamically adjust the driving parameters (such as the driving frequency and the amplitude of the driving voltage). The output terminal is used to output an ultrasonic frequency electrical signal to the excitation coil 7 in real time according to the driving parameters (such as the driving frequency and the amplitude of the driving voltage) adjusted by the control section, so as to drive the super magnetostrictive transducer material 3.

[0036] In one exemplary instance, the input can be configured with three independent channels: The first channel is connected to the drive and self-sensing module 2 to collect the drive current flowing through the excitation coil 7; preferably, it may include, but is not limited to, a sampling module such as a Hall effect current sensor or a high-precision sampling resistor, to improve the accuracy and stability of the current measurement. The second channel is connected to the drive and self-sensing module 2 and is used to collect the voltage signal applied to the excitation coil 7. The third channel is connected to the drive and self-sensing module 2, specifically to the output end of the induction coil 6, and is used to collect the induced voltage and signal output by the induction coil 6, that is, the induced voltage and signal generated by the super magnetostrictive transducer 3 during operation, in order to reflect the current actual ultrasonic amplitude.

[0037] In one exemplary embodiment, the control unit processes the acquired electrical signals, which may include: identifying the current resonance state of the system and performing frequency tracking based on the driving current flowing through the excitation coil 7 and the voltage signal applied thereto, and the induced voltage and signal output by the induction coil 6; dynamically adjusting the driving frequency so that the system always operates at or near the resonance point; calculating the current actual output amplitude of the system based on the induced voltage and signal; comparing the actual amplitude with the set target amplitude, and dynamically adjusting the amplitude of the driving voltage output to the excitation coil 7 based on the deviation between them, so as to achieve closed-loop stable control of the ultrasonic amplitude. The set target amplitude can be a target vibration amplitude determined by the system under no-load or initial calibration conditions, used as a real-time control reference value.

[0038] In one exemplary instance, the output terminal may include two channels, one of which is connected to the excitation coil 7 for outputting a high-frequency drive voltage signal; the other channel is used to provide a feedback signal for the drive voltage, and its signal path is connected to the second channel of the input terminal to form a voltage sampling path for real-time monitoring of the actual voltage applied to the excitation coil 7.

[0039] The magnetostrictive ultrasonic scalpel holder provided in this application embodiment allows the ultrasonic power supply to set system control parameters via its input terminal in an unloaded state. This is used to initially set vibration control parameters such as the target amplitude and starting frequency of the system. For example... Figure 3 The diagram illustrates the process by which an ultrasonic power supply achieves frequency tracking and amplitude stabilization control of a magnetostrictive ultrasonic tool holder. During machining, the ultrasonic power supply continuously acquires feedback signals, including the voltage on the excitation coil 7 (i.e., the driving current signal flowing through the excitation coil 7) and the induced voltage and signal output from the induction coil, through its built-in multi-channel AD acquisition module. The control unit performs resonant frequency identification and tracking based on the acquired electrical signals. Simultaneously, it calculates the actual output amplitude of the system based on the induced voltage and signal, compares it with the set target amplitude, and then dynamically adjusts the driving voltage output to the excitation coil, thus achieving self-sensing and amplitude stabilization control of the ultrasonic system's cutting state.

[0040] In one exemplary instance, the magnetostrictive ultrasonic scalpel holder provided in this application embodiment further includes: The pre-tightening structure, including pre-tightening elements and pre-tightening bolts, is used to apply a pre-tightening force to the supermagnetic transducer material 3; The incomplete housing is used to contain the components of the supermagnetic ultrasonic scalpel holder provided in the embodiments of this application and to allow an external magnetic field to act on the supermagnetic transducer material 3.

[0041] In one embodiment, the preload member is provided with a threaded hole for loading a preload bolt to apply preload force; the preload bolt connects the preload member and the incomplete housing to transmit the preload force.

[0042] This application embodiment also provides a method for amplitude control. Based on the ultrasonic system of the super-magnetostrictive ultrasonic tool holder provided in this application embodiment, it is used to realize real-time self-sensing of the cutting state and closed-loop stable control of the ultrasonic amplitude during the machining process, and may include: Step 400: Set the expected target amplitude according to the no-load state of the ultrasound system.

[0043] When the ultrasonic system is in an unloaded state (processing has not started), the control section of the ultrasonic power supply 5 inputs an unloaded resonant electrical signal (such as...). Figure 5 Step 500 in the process, based on the current system structure and excitation parameters, sets the expected target amplitude of the system (e.g., ...). Figure 5 Step 5012 in the above steps serves as a reference value for subsequent amplitude control. In one embodiment, the expected target amplitude can be determined experimentally or empirically.

[0044] Step 401: After the ultrasonic system starts processing, the drive electrical signal fed back by the ultrasonic system is collected, and the ultrasonic system is frequency tracked based on the collected electrical signal.

[0045] In one exemplary instance, frequency tracking of the ultrasound system based on the acquired drive electrical signal may include: The resonant state of the ultrasonic system is identified based on the acquired driving electrical signals, and the driving frequency of the ultrasonic system is adjusted to complete one frequency tracking operation.

[0046] In one embodiment, after processing begins, the control section of the ultrasonic power supply 5 acquires the drive current signal, voltage signal, and phase information (e.g., from the excitation coil 7 in the drive and self-sensing module 2 of the magnetostrictive ultrasonic tool holder) of the drive and self-sensing module 2. Figure 5 In step 5011, the system can be identified as being in a resonant state by using impedance or phase angle methods, and the driving frequency can be adjusted to quickly bring the system to or near the resonant frequency point, thus completing one frequency tracking operation (e.g., ...). Figure 5 Step 5021 in the middle.

[0047] Step 402: Acquire the electrical signal fed back by the ultrasound system, and obtain the amplitude deviation value based on the acquired induced electrical signal.

[0048] In one exemplary instance, based on a stable driving frequency, the control section of the ultrasonic power supply 5 acquires the induced voltage and signal (such as...) of the induction coil 6 in the driving and self-sensing module 2 of the magnetostrictive ultrasonic scalpel handle. Figure 5 In step 5022, the actual output amplitude of the current system is calculated based on the induced voltage and signal, and compared with the expected target amplitude set in step 100 to obtain the amplitude deviation value.

[0049] In one embodiment, the magnitude of the induced voltage generated by the induction coil 6 of the supermagnetostrictive ultrasonic system is as shown in formula (1): (1) In formula (1), U represents the magnitude of the induced voltage, N represents the number of turns of the induced coil, and A represents the coil area. Let M represent the vacuum permeability, H represent the magnetization of the giant magnetostrictive material, and H represent the magnitude of the applied magnetic field. The magnetization of the giant magnetostrictive material is a function of the applied stress and the magnetic field. Therefore, under the premise of constant prestress, the output amplitude is obtained by measuring the induced voltage and its magnitude. A schematic diagram of the relationship between induced voltage and actual amplitude is shown below. Figure 6 As shown, in this embodiment, the amplitude change of the transducer is controlled by adjusting the driving parameters, and the induced voltage and magnitude generated by the induction coil are measured in real time. Figure 6 The horizontal axis represents the amplitude of the transducer output (unit: μm), and the vertical axis represents the induced voltage (unit: V).

[0050] from Figure 6 As can be seen, the induced voltage remains relatively stable with a slight upward trend when the amplitude is small (approximately 3.0 μm to 3.7 μm); as the amplitude further increases (after 3.7 μm), the induced voltage gradually decreases and shows a more obvious downward trend. This indicates that in this system, the induced voltage is not simply proportional to the amplitude, but is affected by the dynamic changes in the magnetization intensity of the giant magnetostrictive material. Figure 6 The curves shown verify the relationship between the induced voltage and the rate of change of magnetization expressed by formula (1), and further illustrate that, under the premise of keeping the prestress constant, the induced voltage can be used as an effective electrical signal to characterize the output amplitude of the system. Therefore, this voltage signal can be used for amplitude estimation and feedback control of the system, laying the foundation for the subsequent realization of the tool holder's self-sensing function and amplitude stability control.

[0051] Step 403: Adjust the driving voltage value according to the amplitude deviation value.

[0052] In one exemplary instance, the control section of the ultrasonic power supply 5 dynamically adjusts the amplitude of the driving voltage output to the excitation coil 7 based on the amplitude deviation value (e.g., ...). Figure 5Steps 503 and 504 in the process adjust the excitation magnetic field strength acting on the supermagnetic transducer 3 to achieve real-time closed-loop control of the amplitude. The adjusted driving voltage signal is applied to the excitation coil 7 (e.g., via the output of the ultrasonic power supply 5) through the output terminal of the ultrasonic power supply 5. Figure 5 Step 505 in the process is used to drive the ultrasound system to operate.

[0053] Step 404: Return to step 402 and continue adjusting until the resonance state of the ultrasound system and the amplitude of the ultrasound system are simultaneously stable.

[0054] By updating the system status in real time and continuously adjusting the driving parameters, the resonance state and amplitude output of the ultrasonic system are simultaneously stabilized.

[0055] In this embodiment, the actual ultrasonic amplitude of the ultrasonic system is measured using an induced coil, and the driving voltage is adjusted based on the deviation between the actual ultrasonic amplitude and the expected target amplitude to change the magnitude of the excitation magnetic field. This achieves stable amplitude control of the ultrasonic system and ensures a constant output amplitude. In this embodiment, the driving and self-sensing module 2 adopts a non-contact external clamping installation structure, remaining stationary during processing. It achieves the application of the excitation magnetic field and real-time acquisition of the induced voltage and signal without the need for rotating brushes or wireless power transmission devices. Therefore, the amplitude control method provided in this embodiment is particularly suitable for scenarios such as rotary ultrasonic milling and drilling, and has advantages such as simple structure, accurate control, and strong real-time performance.

[0056] This application also provides a computer-readable storage medium storing computer-executable instructions for performing the amplitude control method described in any of the preceding claims.

[0057] Although the embodiments disclosed in this application are as described above, the content described is merely for the purpose of understanding this application and is not intended to limit this application. Any person skilled in the art to which this application pertains may make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in this application; however, the scope of patent protection of this application shall still be determined by the scope defined in the appended claims.

Claims

1. A magnetostrictive ultrasonic scalpel holder, characterized in that, include: The components include: tool holder (1), drive and self-sensing module (2), magnetostrictive transducer material (3), amplitude transformer (4), and ultrasonic power supply (5); among which, Tool holder (1), connected to the machine tool, is used to mount the super magnetostrictive ultrasonic tool holder onto the machine tool; The super magnetostrictive transducer (3) is used to convert electromagnetic energy into ultrasonic vibration under the action of an external excitation magnetic field; The amplitude rod (4) is connected to the super magnetostrictive transducer (3) and is used to transmit the ultrasonic vibration obtained by the super magnetostrictive transducer (3) to the cutting tool; The drive and self-sensing module (2) is arranged coaxially with the super magnetostrictive transducer material (3) through an external clamping device but does not contact it, and remains stationary during the rotational processing; the drive and self-sensing module (2) is connected to the ultrasonic power supply (5) to receive ultrasonic frequency electrical signals, convert electromagnetic energy into magnetic field, and form an excitation magnetic field outside the super magnetostrictive transducer material (3); The ultrasonic power supply (5) serves as the energy source for the excitation magnetic field, and is used to generate and output ultrasonic frequency electrical signals to the drive and self-sensing module (2).

2. The magnetostrictive ultrasonic scalpel holder according to claim 1, wherein, The driving and self-sensing module (2) includes: an induction coil (6) and an excitation coil (7); wherein, The excitation coil (7) is electrically connected to the ultrasonic power supply (5) and is used to receive ultrasonic frequency electrical signals and convert the ultrasonic frequency electrical signals into alternating magnetic fields. The alternating magnetic fields act on the outside of the super magnetostrictive transducer (3) to form an excitation magnetic field. The induction coil (6) is coaxially arranged inside the excitation coil (7). By utilizing the inverse magnetostriction effect of the super magnetostrictive material, the super magnetostrictive transducer (3) outputs induced voltage and signal during vibration. This allows the ultrasonic power supply (5) to calculate the true ultrasonic amplitude of the system by collecting the induced voltage and signal generated by the induction coil (6) during the processing.

3. The magnetostrictive ultrasonic scalpel holder according to claim 2, wherein the driving and self-sensing module (2) comprises: A magnetic conductor (8) is disposed outside the excitation coil (7) to form a closed magnetic circuit to improve induction sensitivity.

4. The magnetostrictive ultrasonic scalpel holder according to claim 3, wherein the material of the magnetic conductor (8) is a high magnetic permeability material.

5. The magnetostrictive ultrasonic scalpel holder according to claim 2 or 3, wherein, The ultrasonic power supply (5) includes: an input terminal, a control section, and an output terminal; wherein, The input terminal is used to collect the driving current flowing through the excitation coil (7), the voltage signal applied to it, and the induced voltage and signal output by the induction coil (6); and to output the collected electrical signal data to the control section after analog-to-digital conversion. The control section is used to perform frequency tracking based on the acquired electrical signals, calculate the current actual amplitude, and dynamically adjust the driving parameters. The output terminal is used to output an ultrasonic frequency electrical signal to the excitation coil (7) in real time according to the driving parameters adjusted by the control section, so as to drive the super magnetostrictive transducer material (3).

6. The magnetostrictive ultrasonic scalpel holder according to claim 5, wherein, The input terminal is equipped with three independent channels: The first channel is connected to the drive and self-sensing module (2) and is used to collect the drive current flowing through the excitation coil (7); The second channel is connected to the drive and self-sensing module (2) and is used to acquire the voltage signal applied to the excitation coil (7); The third channel is connected to the drive and self-sensing module (2) and to the output terminal of the induction coil (6) for collecting the induced voltage and signal output by the induction coil (6).

7. The magnetostrictive ultrasonic scalpel holder according to claim 6, wherein, The input terminal includes a Hall effect current sensor or a high-precision sampling resistor for implementing the sampling.

8. The magnetostrictive ultrasonic scalpel holder according to claim 5, wherein, The control section is used for: Based on the driving current flowing through the excitation coil (7) and the voltage signal applied thereon, and the induced voltage and signal output by the induction coil (6), the current resonance state of the system is identified and frequency tracking is performed, and the driving frequency is dynamically adjusted so that the system always works at or near the resonance point. The actual output amplitude of the system is calculated based on the induced voltage and signal; the actual amplitude is compared with the set target amplitude, and the amplitude of the driving voltage output to the excitation coil 7 is dynamically adjusted according to the deviation between them, so as to achieve closed-loop stable control of the ultrasonic amplitude; The target amplitude is the target vibration amplitude determined by the system under no-load or initial calibration conditions, and is used as a reference value for real-time control.

9. The supermagnetic ultrasonic scalpel holder according to claim 1, further comprising: The pre-tightening structure, including pre-tightening elements and pre-tightening bolts, is used to apply a pre-tightening force to the supermagnetic transducer material (3); An incomplete housing is provided to contain the components of the supermagnetic ultrasonic scalpel handle and to allow an external magnetic field to act on the supermagnetic transducer material (3).

10. A method for achieving amplitude control, characterized in that, Based on the supermagnetic ultrasonic scalpel holder according to any one of claims 1-9; comprising: The control section of the ultrasonic power supply in the super magneto-ultrasonic scalpel handle sets its expected target amplitude according to the no-load state of the ultrasonic system. After the ultrasonic system starts processing, the drive electrical signal fed back by the ultrasonic system is collected, and the ultrasonic system is frequency tracked based on the collected electrical signal. The electrical signal fed back by the ultrasound system is collected, and the amplitude deviation value is obtained based on the collected induced electrical signal; Adjust the driving voltage value according to the amplitude deviation value; The process of collecting the electrical signal fed back by the ultrasound system and obtaining the amplitude deviation value based on the collected induced electrical signal continues until the resonance state of the ultrasound system and the amplitude of the ultrasound system are simultaneously stabilized.

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