A method and system for identifying process parameters of an ultrasonic-assisted cutting device under high load

Abstract

The application discloses a kind of high load under ultrasonic auxiliary cutting device process parameter identification method and system, the method is selected from the multiple principal components in order according to time domain amplitude curve several optimal principal components;According to the vibration amplitude corresponding to optimal principal component, the displacement ratio is calculated;Obtain the cutting force and vibration amplitude under multiple first working conditions, and calculate the average unit cutting force amplitude under each first working condition;Summation average is carried out to the average unit cutting force amplitude under each first working condition;Obtain the actual cutting force, cutting depth and feed under multiple second working conditions, and calculate the unit cutting force under each second working condition;Unit cutting force, cutting depth and feed under each second working condition are fitted;The vibration amplitude of the cutting point of ultrasonic auxiliary cutting device is calculated.The application can accurately obtain the process parameters of ultrasonic auxiliary cutting device under high load, improve the machining precision of ultrasonic auxiliary cutting device.

Description

Technical Field

[0001] This invention relates to the field of machining technology, and in particular to a method and system for identifying process parameters of an ultrasonic-assisted cutting device under high load. Background Technology

[0002] High-strength superhard materials are widely used to meet the requirements of high temperature resistance, corrosion resistance, high dynamic characteristics, and high load-bearing capacity under extreme working conditions. Adding ultrasonic assistance to traditional cutting processes can significantly reduce the cutting force and its oscillation frequency when machining high-strength superhard materials. However, under the impact of large and high-frequency cutting forces, the frequency and vibration amplitude of the cutting device excited by the ultrasonic device will change significantly, causing the ultrasonic amplitude and frequency to deviate from the set process parameters. This significantly reduces machining performance and accuracy. Currently, the vibration amplitude and frequency of ultrasonic-assisted cutting devices under test are measured using instruments such as laser vibrometers. It is difficult to measure the vibration amplitude and frequency of the cutting point under load, and the accuracy of testing ultrasonic-assisted cutting devices depends on the accuracy of the measuring instruments. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a method and system for identifying process parameters of an ultrasonic-assisted cutting device under high load, which can accurately obtain the process parameters of the ultrasonic-assisted cutting device under high load and improve the machining accuracy of the ultrasonic-assisted cutting device.

[0004] In a first aspect, embodiments of the present invention provide a method for identifying process parameters of an ultrasonic-assisted cutting device under high load, the method comprising:

[0005] Acquire the multiple vibration modes under the ultrasonic-assisted cutting device, as well as the time-domain amplitude curves of the multiple vibration modes, the vibration amplitude of each vibration mode, and multiple dominant components;

[0006] The multiple dominant components are sorted according to the vibration amplitude of each mode to obtain the sorted multiple dominant components;

[0007] Select several optimal dominant components from the sorted dominant components based on the time-domain amplitude curve;

[0008] The displacement ratio is calculated based on the vibration amplitude corresponding to the optimal dominant component.

[0009] The cutting force and vibration amplitude under various first working conditions are obtained, and the average unit cutting force amplitude under each first working condition is calculated based on the cutting force and vibration amplitude under each first working condition. The average unit cutting force amplitude under each first working condition is summed and averaged to obtain the average unit cutting force amplitude under the comprehensive first working condition.

[0010] The actual cutting force, depth of cut, and feed rate under various second working conditions are obtained, and the unit cutting force under each second working condition is calculated based on the cutting force, depth of cut, and feed rate under each second working condition; the unit cutting force, the depth of cut, and the feed rate under each second working condition are fitted to obtain a fitting formula;

[0011] The vibration amplitude of the cutting point of the ultrasonic-assisted cutting device is calculated based on the average unit cutting force amplitude under the first comprehensive working condition, the fitting formula, and the displacement ratio.

[0012] Compared with the prior art, the first aspect of the present invention has the following beneficial effects:

[0013] This method obtains multiple dominant components by sorting them according to the vibration amplitude of each mode. From these sorted dominant components, several optimal dominant components are selected based on the time-domain amplitude curve. Selecting the optimal dominant components simplifies the calculation. The method then obtains the cutting force and vibration amplitude under various first working conditions, calculates the average unit cutting force amplitude under each first working condition, and sums and averages these average unit cutting force amplitudes to obtain the average unit cutting force amplitude under the comprehensive first working conditions. Finally, it obtains the actual cutting force, depth of cut, and feed rate under various second working conditions, and calculates the cutting force under each second working condition. The unit cutting force under each second working condition is calculated for depth of cut and feed rate. By calculating the unit cutting force amplitude and unit cutting force under multiple working conditions, the accuracy of process parameter acquisition can be improved and errors caused by unexpected data can be reduced. The unit cutting force, depth of cut, and feed rate under each second working condition are fitted to obtain the fitting formula. Based on the average unit cutting force amplitude under the comprehensive first working condition, the fitting formula, and the displacement ratio, the vibration amplitude of the cutting point of the ultrasonic assisted cutting device is calculated. By calculating the vibration amplitude of the cutting point of the ultrasonic assisted cutting device under cutting force load, the vibration amplitude of the ultrasonic assisted cutting device under high load (i.e., process parameters) can be accurately obtained, thereby improving the machining accuracy of the ultrasonic assisted cutting device.

[0014] According to some embodiments of the present invention, the step of selecting several optimal dominant components from the sorted plurality of dominant components based on the time-domain amplitude curve includes:

[0015] If the time-domain amplitude curve is not in the form of a short pulse, and the vibration amplitude of the second dominant component among the sorted dominant components does not exceed 10% of the vibration amplitude of the first dominant component, then the first dominant component is taken as the optimal dominant component.

[0016] If the time-domain amplitude curve is not in the form of a short pulse, and the vibration amplitude of the second dominant component in the sorted multiple dominant components exceeds 10% of the vibration amplitude of the first dominant component, then the first dominant component and the second dominant component are taken as the optimal dominant component.

[0017] If the time-domain amplitude curve is in the form of a short pulse, and the number of dominant components among the sorted dominant components is greater than or equal to three, then the first three dominant components are taken as the optimal dominant components; if the number of dominant components among the sorted dominant components is less than three, then all the dominant components among the sorted dominant components are taken as the optimal dominant components.

[0018] According to some embodiments of the present invention, calculating the displacement ratio based on the vibration amplitude corresponding to the optimal dominant component includes:

[0019] Two points are randomly selected from the ultrasonic amplitude transformer in the ultrasonic-assisted cutting device, one of which is used as the observation point and the other as the target point;

[0020] Obtain the vibration amplitude of the optimal dominant component corresponding to the mode shape at the observation point;

[0021] Obtain the vibration amplitude of the optimal dominant component corresponding to the mode shape at the target point;

[0022] If the optimal dominant component is only the first dominant component, then the first displacement ratio is calculated based on the vibration amplitude of the optimal dominant component corresponding to the mode shape at the observation point and the vibration amplitude of the optimal dominant component corresponding to the mode shape at the target point:

[0023]

[0024] If the optimal dominant component is the first dominant component and the second dominant component, then the second displacement ratio is calculated based on the vibration amplitude of the optimal dominant component corresponding to the mode shape at the observation point and the vibration amplitude of the optimal dominant component corresponding to the mode shape at the target point:

[0025]

[0026] If the optimal dominant components are the first three dominant components, then the third displacement ratio is calculated based on the vibration amplitude of the optimal dominant component corresponding to the mode shape at the observation point and the vibration amplitude of the optimal dominant component corresponding to the mode shape at the target point:

[0027]

[0028] Where, k i λ represents the vibration amplitude of the optimal dominant component corresponding to the i-th mode shape. αλ represents the first displacement ratio corresponding to the first dominant component. ε λ represents the ratio of the second displacement to the first dominant component. β λ represents the second displacement ratio corresponding to the second dominant component. γ λ represents the ratio of the third displacement to the first dominant component. χ λ represents the ratio of the third displacement to the second dominant component. η This represents the third displacement ratio corresponding to the third dominant component. Let represent the vibration amplitude of the optimal dominant component corresponding to the i-th mode shape at observation point A. This represents the vibration amplitude of the optimal dominant component corresponding to the i-th mode shape at target point B.

[0029] According to some embodiments of the present invention, calculating the average unit cutting force amplitude under each first working condition based on the cutting force and vibration amplitude under each first working condition includes:

[0030] Obtain the average cutting force, maximum cutting force, minimum cutting force, average vibration amplitude, maximum vibration amplitude, and minimum vibration amplitude under each of the first working conditions;

[0031] Based on the average cutting force, the maximum cutting force, the minimum cutting force, the average vibration amplitude, the maximum vibration amplitude, and the minimum vibration amplitude, the average unit cutting force amplitude under each first working condition is calculated as follows:

[0032]

[0033] Among them, hf ave-i k represents the average unit cutting force amplitude under each of the first operating conditions. i-ave k represents the average amplitude of the vibration. i-max k represents the maximum amplitude of the vibration. i-min F represents the minimum amplitude of the vibration. i-ave F represents the average cutting force. i-max F represents the maximum value of the cutting force. i-min This represents the minimum value of the cutting force.

[0034] According to some embodiments of the present invention, the unit cutting force under each of the second operating conditions is calculated in the following manner:

[0035]

[0036] Among them, F hLet f represent the unit cutting force under each of the second working conditions, F represent the actual cutting force under each of the second working conditions, and h represent the depth of cut under each of the second working conditions. z This represents the feed rate under each of the second operating conditions.

[0037] According to some embodiments of the present invention, the fitting formula is obtained in the following manner:

[0038] F h =k s h+k f f z +b1

[0039] Where, k s ,k f b1 represents the multivariate regression fitting coefficient.

[0040] According to some embodiments of the present invention, the vibration amplitude of the cutting point of the ultrasonic-assisted cutting device is calculated in the following manner:

[0041] ψ=λ×hf ave ×(k s h+k f f z +b1)×h×f z

[0042] Wherein, ψ represents the vibration amplitude at the cutting point of the ultrasonic-assisted cutting device, λ represents the displacement ratio, and f ave This represents the average unit cutting force amplitude under the comprehensive first working condition.

[0043] Secondly, embodiments of the present invention also provide a process parameter identification system for an ultrasonic-assisted cutting device under high load, the process parameter identification system for an ultrasonic-assisted cutting device under high load includes:

[0044] The data acquisition unit is used to acquire multiple vibration modes under the ultrasonic-assisted cutting device, as well as the time-domain amplitude curves of the multiple vibration modes, the vibration amplitude of each vibration mode, and multiple dominant components.

[0045] A dominant component sorting unit is used to sort the multiple dominant components according to the vibration amplitude of each mode, so as to obtain the sorted multiple dominant components.

[0046] The dominant component selection unit is used to select several optimal dominant components from the sorted dominant components according to the time-domain amplitude curve.

[0047] The displacement ratio calculation unit is used to calculate the displacement ratio based on the vibration amplitude corresponding to the optimal dominant component.

[0048] The first amplitude calculation unit is used to obtain the cutting force and vibration amplitude under various first working conditions, and to calculate the average unit cutting force amplitude under each first working condition based on the cutting force and vibration amplitude under each first working condition; and to sum and average the average unit cutting force amplitude under each first working condition to obtain the average unit cutting force amplitude under the comprehensive first working conditions.

[0049] A calculation fitting unit is used to obtain the actual cutting force, depth of cut, and feed rate under various second working conditions, and to calculate the unit cutting force under each second working condition based on the cutting force, depth of cut, and feed rate under each second working condition; and to fit the unit cutting force, the depth of cut, and the feed rate under each second working condition to obtain a fitting formula;

[0050] The second amplitude calculation unit is used to calculate the vibration amplitude of the cutting point of the ultrasonic-assisted cutting device based on the average unit cutting force amplitude under the comprehensive first working condition, the fitting formula, and the displacement ratio.

[0051] Thirdly, embodiments of the present invention also provide a process parameter identification device for an ultrasonic-assisted cutting device under high load, including at least one control processor and a memory for communicatively connecting to the at least one control processor; the memory stores instructions that can be executed by the at least one control processor, and the instructions are executed by the at least one control processor to enable the at least one control processor to perform a process parameter identification method for an ultrasonic-assisted cutting device under high load as described above.

[0052] Fourthly, embodiments of the present invention also provide a computer-readable storage medium storing computer-executable instructions for causing a computer to execute the above-described method for identifying process parameters of an ultrasonic-assisted cutting device under high load.

[0053] It is understood that the beneficial effects of the second to fourth aspects compared with the related technologies are the same as the beneficial effects of the first aspect compared with the related technologies. Please refer to the relevant description in the first aspect above, which will not be repeated here. Attached Figure Description

[0054] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0055] Figure 1 This is a flowchart of a method for identifying process parameters of an ultrasonic-assisted cutting device under high load, according to an embodiment of the present invention.

[0056] Figure 2This is a structural diagram of a process parameter identification system for an ultrasonic-assisted cutting device under high load, according to an embodiment of the present invention. Detailed Implementation

[0057] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0058] In the description of this invention, the use of terms such as "first," "second," etc., is for the purpose of distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0059] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0060] In the description of this invention, it should be noted that, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0061] High-strength superhard materials are widely used to meet the requirements of high temperature resistance, corrosion resistance, high dynamic characteristics, and high load-bearing capacity under extreme working conditions. Adding ultrasonic assistance to traditional cutting processes can significantly reduce the cutting force and its oscillation frequency when machining high-strength superhard materials. However, under the impact of large and high-frequency cutting forces, the frequency and vibration amplitude of the cutting device excited by the ultrasonic device will change significantly, causing the ultrasonic amplitude and frequency to deviate from the set process parameters. This significantly reduces machining performance and accuracy. Currently, the vibration amplitude and frequency of ultrasonic-assisted cutting devices under test are measured using instruments such as laser vibrometers. It is difficult to measure the vibration amplitude and frequency of the cutting point under load, and the accuracy of testing ultrasonic-assisted cutting devices depends on the accuracy of the measuring instruments.

[0062] To address the aforementioned problems, this invention obtains multiple dominant components by sorting them according to the vibration amplitude of each mode shape. From these sorted dominant components, several optimal dominant components are selected based on the time-domain amplitude curve. Selecting the optimal dominant components simplifies the calculation. The invention also obtains the cutting force and vibration amplitude under various first working conditions, calculates the average unit cutting force amplitude under each first working condition, and sums and averages these average unit cutting force amplitudes to obtain the average unit cutting force amplitude under the comprehensive first working conditions. Furthermore, it obtains the actual cutting force, depth of cut, and feed rate under various second working conditions, and calculates the values ​​for each second working condition. The unit cutting force, depth of cut, and feed rate are calculated for each second working condition. By calculating the unit cutting force amplitude and unit cutting force under multiple working conditions, the accuracy of process parameter acquisition can be improved, and errors caused by unexpected data can be reduced. The unit cutting force, depth of cut, and feed rate under each second working condition are fitted to obtain the fitting formula. Based on the average unit cutting force amplitude under the comprehensive first working condition, the fitting formula, and the displacement ratio, the vibration amplitude of the cutting point of the ultrasonic assisted cutting device is calculated. By calculating the vibration amplitude of the cutting point of the ultrasonic assisted cutting device under cutting force load, the vibration amplitude of the ultrasonic assisted cutting device under high load (i.e., process parameters) can be accurately obtained, thereby improving the machining accuracy of the ultrasonic assisted cutting device.

[0063] Reference Figure 1 This invention provides a method for identifying process parameters of an ultrasonic-assisted cutting device under high load. This method includes, but is not limited to, steps S100 to S700, wherein:

[0064] Step S100: Obtain the multi-mode vibration and its time-domain amplitude curves, vibration amplitude of each mode, and multiple dominant components under the ultrasonic-assisted cutting device.

[0065] Step S200: Sort multiple dominant components according to the vibration amplitude of each mode to obtain sorted multiple dominant components;

[0066] Step S300: Select several optimal dominant components from the sorted dominant components based on the time-domain amplitude curve;

[0067] Step S400: Calculate the displacement ratio based on the vibration amplitude corresponding to the optimal dominant component;

[0068] Step S500: Obtain the cutting force and vibration amplitude under various first working conditions, and calculate the average unit cutting force amplitude under each first working condition based on the cutting force and vibration amplitude under each first working condition; sum and average the average unit cutting force amplitude under each first working condition to obtain the average unit cutting force amplitude under the comprehensive first working conditions.

[0069] Step S600: Obtain the actual cutting force, depth of cut, and feed rate under various second working conditions, and calculate the unit cutting force under each second working condition based on the cutting force, depth of cut, and feed rate under each second working condition; fit the unit cutting force, depth of cut, and feed rate under each second working condition to obtain the fitting formula;

[0070] Step S700: Calculate the vibration amplitude of the cutting point of the ultrasonic-assisted cutting device based on the average unit cutting force amplitude, fitting formula, and displacement ratio under the comprehensive first working condition.

[0071] In steps S100 to S700 of some embodiments, to simplify calculations, this embodiment acquires multiple vibration modes and their time-domain amplitude curves, vibration amplitude of each mode, and multiple dominant components under the ultrasonic-assisted cutting device. The dominant components are then sorted according to the vibration amplitude of each mode to obtain the sorted dominant components. Several optimal dominant components are selected from the sorted dominant components based on the time-domain amplitude curves. To improve the accuracy of process parameter acquisition and reduce errors caused by unexpected data, this embodiment acquires cutting forces and vibration amplitudes under various first working conditions, and calculates the average unit cutting force amplitude under each first working condition based on the cutting force and vibration amplitude under each first working condition. The average unit cutting force amplitude under the conditions is summed and averaged to obtain the average unit cutting force amplitude under the comprehensive first working condition. The actual cutting force, cutting depth, and feed rate under various second working conditions are obtained, and the unit cutting force under each second working condition is calculated based on the cutting force, cutting depth, and feed rate under each second working condition. In order to accurately obtain the vibration amplitude (i.e., process parameters) of the ultrasonic assisted cutting device under high load and improve the machining accuracy of the ultrasonic assisted cutting device, this embodiment obtains the fitting formula by fitting the unit cutting force, cutting depth, and feed rate under each second working condition. Based on the average unit cutting force amplitude under the comprehensive first working condition, the fitting formula, and the displacement ratio, the vibration amplitude of the cutting point of the ultrasonic assisted cutting device is calculated.

[0072] In some embodiments, selecting several optimal dominant components from the sorted dominant components based on the time-domain amplitude curve includes:

[0073] If the time-domain amplitude curve is not in the form of a short pulse, and the vibration amplitude of the second dominant component among the sorted dominant components does not exceed 10% of the vibration amplitude of the first dominant component, then the first dominant component is taken as the optimal dominant component.

[0074] If the time-domain amplitude curve is not in the form of a short pulse, and the vibration amplitude of the second dominant component in the sorted dominant components exceeds 10% of the vibration amplitude of the first dominant component, then the first dominant component and the second dominant component are taken as the optimal dominant components.

[0075] If the time-domain amplitude curve is in the form of a short pulse, and the number of dominant components among the sorted dominant components is greater than or equal to three, then the first three dominant components are taken as the optimal dominant components; if the number of dominant components among the sorted dominant components is less than three, then all the dominant components among the sorted dominant components are taken as the optimal dominant components.

[0076] In this embodiment, several optimal dominant components are selected from the sorted dominant components based on the time-domain amplitude curve, which simplifies the calculation while ensuring a certain level of accuracy.

[0077] In some embodiments, the displacement ratio is calculated based on the vibration amplitude corresponding to the optimal dominant component, including:

[0078] In the ultrasonic amplifier rod of the ultrasonic-assisted cutting device, any two points are selected, one as the observation point and the other as the target point;

[0079] Obtain the vibration amplitude of the optimal dominant component corresponding to the mode shape at the observation point;

[0080] Obtain the vibration amplitude of the optimal dominant component corresponding to the mode shape at the target point;

[0081] If the optimal dominant component is the first dominant component, then the first displacement ratio is calculated based on the vibration amplitude of the optimal dominant component corresponding to the mode shape at the observation point and the vibration amplitude of the optimal dominant component corresponding to the mode shape at the target point:

[0082]

[0083] If the optimal dominant components are the first and second dominant components, then the second displacement ratio is calculated based on the vibration amplitude of the optimal dominant component corresponding to the mode shape at the observation point and the vibration amplitude of the optimal dominant component corresponding to the mode shape at the target point:

[0084]

[0085] If the optimal dominant components are the first three dominant components, then the third displacement ratio is calculated based on the vibration amplitude of the optimal dominant component corresponding to the mode shape at the observation point and the vibration amplitude of the optimal dominant component corresponding to the mode shape at the target point:

[0086]

[0087] Where, k i λ represents the vibration amplitude of the optimal dominant component corresponding to the i-th mode shape. α λ represents the first displacement ratio corresponding to the first dominant component. ε λ represents the ratio of the second displacement to the first dominant component. β λ represents the second displacement ratio corresponding to the second dominant component. γ λ represents the ratio of the third displacement to the first dominant component. χ λ represents the ratio of the third displacement to the second dominant component. η This represents the third displacement ratio corresponding to the third dominant component. Let represent the vibration amplitude of the optimal dominant component corresponding to the i-th mode shape at observation point A. This represents the vibration amplitude of the optimal dominant component corresponding to the i-th mode shape at target point B.

[0088] In some embodiments, calculating the average unit cutting force amplitude under each first operating condition based on the cutting force and vibration amplitude under each first operating condition includes:

[0089] Obtain the average, maximum, and minimum cutting force, as well as the average, maximum, and minimum vibration amplitudes for each first working condition.

[0090] Based on the average cutting force, maximum cutting force, minimum cutting force, average vibration amplitude, maximum vibration amplitude, and minimum vibration amplitude, the average unit cutting force amplitude under each first working condition is calculated as follows:

[0091]

[0092] Among them, hf ave-i k represents the average unit cutting force amplitude under each first working condition. i-ave k represents the average amplitude of vibration. i-max k represents the maximum amplitude of vibration. i-min F represents the minimum amplitude of vibration. i-ave F represents the average cutting force. i-max F represents the maximum cutting force. i-min This indicates the minimum cutting force.

[0093] In this embodiment, the unit cutting force amplitude is calculated using various operating conditions, which can improve the accuracy of obtaining process parameters and reduce errors caused by unexpected data.

[0094] In some embodiments, the unit cutting force under each second operating condition is calculated as follows:

[0095]

[0096] Among them, F h f represents the unit cutting force under each second working condition, F represents the actual cutting force under each second working condition, and h represents the depth of cut under each second working condition. z This indicates the feed rate under each of the second operating conditions.

[0097] In this embodiment, the unit cutting force is calculated using various operating conditions, which can improve the accuracy of obtaining process parameters and reduce errors caused by unexpected data.

[0098] In some embodiments, the fitting formula is obtained as follows:

[0099] F h =k s h+k f f z +b1

[0100] Where, k s ,k f b1 represents the multivariate regression fitting coefficient.

[0101] In some embodiments, the vibration amplitude at the cutting point of the ultrasonic-assisted cutting device is calculated as follows:

[0102] ψ=λ×hf ave ×(k s h+k f f z +b1)×h×f z

[0103] Where ψ represents the vibration amplitude at the cutting point of the ultrasonic-assisted cutting device, λ represents the displacement ratio, and f ave This represents the average unit cutting force amplitude under the first comprehensive operating condition.

[0104] In this embodiment, the actual cutting force load is taken into account. By calculating the vibration amplitude of the cutting point of the ultrasonic assisted cutting device under the cutting force load, the vibration amplitude of the ultrasonic assisted cutting device under high load (i.e., process parameters) can be accurately obtained, thereby improving the machining accuracy of the ultrasonic assisted cutting device.

[0105] To facilitate understanding by those skilled in the art, a set of preferred embodiments is provided below:

[0106] Step 1. Perform modal testing on the ultrasonic amplitude transformer. The modal testing consists of an LMS data testing and analysis system (which can be obtained directly through modal testing, referencing the LMS textbook "Zhang Li et al., Modal Analysis and Experiment, Tsinghua University, 2011, Chapter 3, 3.4.6"; for specific testing procedures, refer to "LMS China Testing Department, Test.Lab Chinese Operation Guide, LMS (Beijing) Technology Co., Ltd., 2011, Chapter 9, pp. 71-92"), an accelerometer, a force hammer, and data acquisition equipment. The modal tests obtain the 1st, 2nd, 3rd, 4th, and 5th mode shapes and their corresponding frequencies of the ultrasonic amplitude transformer.

[0107] Step 2. Fix the ultrasonic amplitude transformer to the worktable using the connector. The connection point of the ultrasonic amplitude transformer is the mode shape node. When the connection point is the mode shape node of the ultrasonic amplitude transformer (orders 1, 2, 3, 4, and 5), turn on the ultrasonic power supply to activate the piezoelectric actuator, exciting the ultrasonic amplitude transformer to vibrate at high frequency. Measure the time-domain amplitude curves of the 1st to 5th mode shapes. Obtain the maximum amplitude values ​​from the time-domain amplitude curves, which are l1, l2, l3, l4, and l5, respectively. The corresponding modes' frequencies are f1, f2, f3, f4, and f5, respectively. The characteristic settings are as follows: The time-domain amplitude curve is converted to a frequency-domain curve using Fourier transform. Multiple dominant components are identified based on the various vibration amplitudes, and these components are then sorted according to their amplitude, i.e., the order of the dominant components is determined by the magnitude of the vibration amplitude. The component with the largest amplitude is designated as the first dominant component, the second largest as the second dominant component, and so on. From these sorted dominant components, several optimal dominant components are selected based on the time-domain amplitude curve. The specific process is as follows:

[0108] 1) When the time-domain amplitude curve is not in the form of a short pulse, if the amplitude of the second dominant component does not exceed 10% of the amplitude of the first dominant component, then the optimal dominant component is only the amplitude and frequency of the first dominant component among the sorted dominant components. Therefore, the amplitudes of the 1st to 5th mode shapes are k1, k2, k3, k4, k5, and the corresponding frequencies are f1', f2', f3', f4', f5'. The amplitude and frequency of the first dominant component of each mode shape are set as α. i (k i ,f i For this type of waveform, this embodiment ignores the second and subsequent dominant components, which simplifies the calculation. Although it will reduce the accuracy slightly, it will not exceed 5%.

[0109] 2) When the time-domain amplitude curve is not in the form of a short pulse, if the amplitude of the second dominant component exceeds 10% of the amplitude of the first dominant component, then the optimal dominant component is the first dominant component ε among the sorted dominant components. i (k i ,f i The amplitude and frequency β of the second dominant component i (k i ,f i ), where i = 1, ..., 5, and the vibration amplitudes of the other dominant components are not taken.

[0110] 3) When the time-domain amplitude curve is in pulse form, considering that the mode shape with a large amplitude is more likely to have the greatest impact on processing in actual vibration, this embodiment only takes the first three dominant components from the sorted dominant components based on the vibration amplitude, and sets them as γ. i (k i ,f i ), χ i (k i ,f i ), η i (k i ,f i ), where i = 1, ..., 5. If there are fewer than three, then all the dominant components in the sorted dominant components are taken.

[0111] Step 3. Based on the experiments in Steps 1 and 2, repeat twice (finding values ​​close to each other to reduce errors caused by unexpected factors). In the ultrasonic amplitude transformer of the ultrasonic-assisted cutting device, arbitrarily select two points, one as observation point A and the other as target point B. Obtain the mode shapes and corresponding amplitude data for observation point A and target point B respectively (i.e., obtain the vibration amplitude of the optimal dominant component corresponding to the mode shape of observation point A; obtain the vibration amplitude of the optimal dominant component corresponding to the mode shape of target point B). Points A and B are points with the same value; that is, in the amplitude coordinate system, when A is positive, B is also positive, and vice versa. Based on the fact that when a wave propagates in a long rod, with other parameters remaining constant, the displacement ratio of any two points in the rod is proportional, the displacement ratio of observation point A to target point B can be obtained. Where:

[0112]

[0113] In actual processing, the mode shape of the ultrasonic amplitude transformer changes with the load. To improve the reliability of the displacement ratio coefficient between the observation point and the target point, the average value method is used to obtain the displacement ratio value per unit amplitude. The specific process is as follows:

[0114] 1) If the optimal dominant component is only the first dominant component, then the first displacement ratio is calculated based on the vibration amplitude of the optimal dominant component corresponding to the mode shape at the observation point and the vibration amplitude of the optimal dominant component corresponding to the mode shape at the target point:

[0115]

[0116] 2) If the optimal dominant components are the first and second dominant components, then the second displacement ratio is calculated based on the vibration amplitude of the optimal dominant component corresponding to the mode shape at the observation point and the vibration amplitude of the optimal dominant component corresponding to the mode shape at the target point:

[0117]

[0118] 3) If the optimal dominant components are the first three dominant components, then the third displacement ratio is calculated based on the vibration amplitude of the optimal dominant component corresponding to the mode shape at the observation point and the vibration amplitude of the optimal dominant component corresponding to the mode shape at the target point:

[0119]

[0120] Where, k i λ represents the vibration amplitude of the optimal dominant component corresponding to the i-th mode shape. α λ represents the first displacement ratio corresponding to the first dominant component. ε λ represents the ratio of the second displacement to the first dominant component. β λ represents the second displacement ratio corresponding to the second dominant component. γ λ represents the ratio of the third displacement to the first dominant component. χ λ represents the ratio of the third displacement to the second dominant component. η This represents the third displacement ratio corresponding to the third dominant component. Let represent the vibration amplitude of the optimal dominant component corresponding to the i-th mode shape at observation point A. This represents the vibration amplitude of the optimal dominant component corresponding to the i-th mode shape at target point B.

[0121] Under the action of an ultrasonic power source, a piezoelectric actuator excites an ultrasonic vibration amplitude transformer to vibrate. The vibration of the amplitude transformer has the following characteristics: when the amplitude at one point increases, the amplitude at the other point also increases proportionally. That is, under different excitation conditions, the different displacement components of the observation point A and the target point B are directly proportional.

[0122] Step 4. Since the impedance of the ultrasonic electrical terminal system changes under different cutting force loads, ultrasonic vibration tests are conducted under different cutting force loads to obtain the amplitude and frequency at the observation point under different impedances, which are then set as ψ. i (k i ,fi The ultrasonic-assisted cutting device is fixed to a force gauge, which is in turn fixed to the lathe worktable. The lathe's lead screw drives the worktable to achieve feed motion. The force gauge collects cutting forces under different process parameters, with different cutting forces achieved through different combinations of process parameters. The cutting tool is fixed to the end of the ultrasonic amplitude transformer, and the tool's rake face is horizontally aligned with the ultrasonic vibration direction. In machining, the cutting force is usually proportional to the cutting area. However, in the cutting experiment, after adding ultrasonic vibration, the cutting force and cutting area are no longer directly proportional. Considering that in ultrasonic cutting, a larger vibration amplitude results in a better improvement in cutting performance, and a higher limiting speed for improving cutting performance, the limiting cutting speed is defined as the maximum tangential speed v induced by ultrasonic vibration. max This ensures that reciprocating motion is achieved under the combined influence of ultrasonic vibration and cutting speed, forming an intermittent cutting process and improving machining performance. The limiting cutting speed is:

[0123] v max =2πf v h v

[0124] Where π represents pi, f v The frequency of ultrasonic vibration, h v This indicates the amplitude of ultrasonic vibration. This limiting cutting speed is the maximum critical cutting speed, meaning that the cutting speed set later will not exceed this limiting cutting speed.

[0125] 1) The initial operating conditions were set as follows: initial cutting speed of 300 rpm, depth of cut of 0.5 mm, feed rate of 0.5 mm, and ultrasonic vibration amplitude of 0.02 mm. Subsequent experiments maintained the same conditions, with the depth of cut increasing by 0.2 mm each time. The experimental process was as follows:

[0126] The average cutting force obtained from the first experiment was F. 1-ave The maximum cutting force is F 1-max The minimum cutting force is F 1-min Simultaneously, the laser vibrometer collects the vibration amplitude curve at observation point A, obtaining the average vibration amplitude k. 1-ave Minimum vibration amplitude k 1-min The maximum amplitude of the vibration is k 1-max The ultrasonic vibration amplitude hf1 of the unit cutting force of the average cutting force in the first experiment is: The ultrasonic vibration amplitude hf2 of the unit cutting force of the maximum cutting force is The minimum cutting force hf3 is The average unit cutting force amplitude of the first experiment under the first working condition is calculated as follows:

[0127]

[0128] The average cutting force obtained in the second experiment was F. 2-ave The maximum cutting force is F 2-max The minimum cutting force is F 2-min Simultaneously, the laser vibrometer collects the vibration amplitude curve at observation point A, obtaining the average vibration amplitude k. 2-ave Minimum vibration amplitude k 2-min The maximum amplitude of the vibration is k 2-max The ultrasonic vibration amplitude hf1 of the unit cutting force of the average cutting force in the second experiment is: The ultrasonic vibration amplitude hf2 of the unit cutting force of the maximum cutting force is The minimum cutting force hf3 is The average unit cutting force amplitude of the second experiment under the first working condition is calculated as follows:

[0129]

[0130] Similarly, when the corresponding experiment is the i-th experiment, the i-th experiment is hf ave-i ,

[0131] Among them, hf ave-i k represents the average unit cutting force amplitude under each first working condition. i-ave Let k represent the mean vibration amplitude of the i-th experiment. i-max k represents the maximum vibration amplitude in the i-th experiment. i-min F represents the minimum vibration amplitude in the i-th experiment. i-ave F represents the average cutting force in the i-th experiment. i-max F represents the maximum cutting force in the i-th experiment. i-min This represents the minimum cutting force in the i-th experiment.

[0132] Stop increasing the depth of cut when it reaches a point no less than the maximum depth of cut in actual machining, and set it to hf. ave-N Since only the cutting force load affects the ultrasonic vibration amplitude in ultrasonic vibration cutting, the average unit cutting force amplitude hf under the first working condition is obtained by averaging the above comprehensive average cutting force amplitudes. ave The calculation is as follows:

[0133]

[0134] 2) The second working condition is similar to the first working condition, except that other conditions remain unchanged. Cutting experiments are conducted with the feed rate increasing sequentially, and combined with cutting experiments with increasing depth of cut. Based on the cutting force data for different feed rates and depths of cut, the unit cutting force is calculated as follows:

[0135]

[0136] Among them, F h Let f represent the unit cutting force for each second working condition, F represent the actual cutting force for each second working condition, and h represent the depth of cut for each second working condition. z This indicates the feed rate for each of the second operating conditions.

[0137] Based on the experimental data above, using a multiple regression method, the relationship between unit cutting force, depth of cut, and feed rate was fitted to obtain a fitting formula. The fitting formula was obtained as follows:

[0138] F h =k s h+k f f z +b1

[0139] Where, k s ,k f b1 represents the multivariate regression fitting coefficient.

[0140] Therefore, under actual high load, the ultrasonic vibration amplitude ψ at the cutting point of the ultrasonic cutting device is:

[0141] ψ=λ×hf ave ×(k s h+k f f z +b1)×h×f z

[0142] Where ψ represents the vibration amplitude at the cutting point of the ultrasonic-assisted cutting device, λ represents the displacement ratio, and f ave This represents the average unit cutting force amplitude under the first comprehensive operating condition.

[0143] The displacement ratio λ is determined based on the acceleration signal collected by the vibration acceleration sensor on the ultrasonic amplitude transformer. The determination standard is shown in steps 2 and 3.

[0144] In this embodiment, the vibration amplitude of existing ultrasonic-assisted cutting devices is measured under no-load conditions. However, during actual cutting, the ultrasonic vibration cutting point is affected by the cutting force load, resulting in different ultrasonic vibration amplitudes compared to the no-load amplitude. Furthermore, the vibration amplitude at the cutting point varies under different cutting force loads. Existing ultrasonic cutting parameter optimizations are all performed under no-load conditions, without considering the actual cutting force. This embodiment provides a method for calculating the ultrasonic vibration amplitude under actual cutting force loads. This offers a more effective method for improving machining performance and accuracy, thus significantly improving the machining accuracy, workpiece quality, and tool life of ultrasonic-assisted cutting devices, especially in precision machining of high-strength, superhard materials.

[0145] Reference Figure 2 This invention also provides a process parameter identification system for an ultrasonic-assisted cutting device under high load. This system includes a data acquisition unit 100, a dominant component sorting unit 200, a dominant component selection unit 300, a displacement ratio calculation unit 400, a first amplitude calculation unit 500, a calculation and fitting unit 600, and a second amplitude calculation unit 700, wherein:

[0146] The data acquisition unit 100 is used to acquire multiple vibration modes under the ultrasonic-assisted cutting device, as well as the time-domain amplitude curves of the multiple vibration modes, the vibration amplitude of each vibration mode, and multiple dominant components.

[0147] The dominant component sorting unit 200 is used to sort multiple dominant components according to the vibration amplitude of each mode, and obtain the sorted multiple dominant components.

[0148] The dominant component selection unit 300 is used to select several optimal dominant components from the sorted dominant components based on the time-domain amplitude curve.

[0149] The displacement ratio calculation unit 400 is used to calculate the displacement ratio based on the vibration amplitude corresponding to the optimal dominant component.

[0150] The first amplitude calculation unit 500 is used to obtain the cutting force and vibration amplitude under various first working conditions, and calculate the average unit cutting force amplitude under each first working condition based on the cutting force and vibration amplitude under each first working condition; and sum and average the average unit cutting force amplitude under each first working condition to obtain the average unit cutting force amplitude under the comprehensive first working conditions.

[0151] The calculation fitting unit 600 is used to obtain the actual cutting force, cutting depth and feed rate under various second working conditions, and to calculate the unit cutting force under each second working condition based on the cutting force, cutting depth and feed rate under each second working condition; and to fit the unit cutting force, cutting depth and feed rate under each second working condition to obtain the fitting formula.

[0152] The second amplitude calculation unit 700 is used to calculate the vibration amplitude of the cutting point of the ultrasonic-assisted cutting device based on the average unit cutting force amplitude, fitting formula and displacement ratio under the comprehensive first working condition.

[0153] It should be noted that since the process parameter identification system for ultrasonic-assisted cutting device under high load in this embodiment is based on the same inventive concept as the process parameter identification method for ultrasonic-assisted cutting device under high load described above, the corresponding content in the method embodiment is also applicable to this system embodiment, and will not be described in detail here.

[0154] This invention also provides a process parameter identification device for an ultrasonic-assisted cutting device under high load, comprising: at least one control processor and a memory for communicating with the at least one control processor.

[0155] Memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory may optionally include memory remotely located relative to the processor, and these remote memories can be connected to the processor via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0156] The non-transient software program and instructions required to implement the high-load ultrasonic-assisted cutting device process parameter identification method of the above embodiments are stored in memory. When executed by the processor, the high-load ultrasonic-assisted cutting device process parameter identification method of the above embodiments is executed, for example, the method described above is executed. Figure 1 The method steps S100 to S700.

[0157] The system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0158] This invention also provides a computer-readable storage medium storing computer-executable instructions. These instructions are executed by one or more control processors, causing the processors to perform a high-load ultrasonic-assisted cutting device process parameter identification method from the above-described method embodiments. For example, they can execute the above-described... Figure 1 The functions of steps S100 to S700 in the method.

[0159] It will be understood by those skilled in the art that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, as is known to those skilled in the art, communication media typically contain computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0160] The above is a detailed description of the preferred embodiments of this application. However, the embodiments of this application are not limited to the above-described implementation methods. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the embodiments of this application. All such equivalent modifications or substitutions are included within the scope defined by the claims of the embodiments of this application.

Claims

1. A method for identifying process parameters of an ultrasonic-assisted cutting device under high load, characterized in that, The method for identifying process parameters of the ultrasonic-assisted cutting device under high load includes: Acquire the multiple vibration modes under the ultrasonic-assisted cutting device, as well as the time-domain amplitude curves of the multiple vibration modes, the vibration amplitude of each vibration mode, and multiple dominant components; The multiple dominant components are sorted according to the vibration amplitude of each mode to obtain the sorted multiple dominant components; Select several optimal dominant components from the sorted dominant components based on the time-domain amplitude curve; The displacement ratio is calculated based on the vibration amplitude corresponding to the optimal dominant component. The cutting force and vibration amplitude under various first working conditions are obtained, and the average unit cutting force amplitude under each first working condition is calculated based on the cutting force and vibration amplitude under each first working condition. The average unit cutting force amplitude under each first working condition is summed and averaged to obtain the average unit cutting force amplitude under the comprehensive first working condition. The actual cutting force, depth of cut, and feed rate under various second working conditions are obtained, and the unit cutting force under each second working condition is calculated based on the cutting force, depth of cut, and feed rate under each second working condition; the unit cutting force, the depth of cut, and the feed rate under each second working condition are fitted to obtain a fitting formula; The vibration amplitude of the cutting point of the ultrasonic-assisted cutting device is calculated based on the average unit cutting force amplitude under the first comprehensive working condition, the fitting formula, and the displacement ratio.

2. The method for identifying process parameters of an ultrasonic-assisted cutting device under high load according to claim 1, characterized in that, The step of selecting several optimal dominant components from the sorted dominant components based on the time-domain amplitude curve includes: If the time-domain amplitude curve is not in the form of a short pulse, and the vibration amplitude of the second dominant component among the sorted dominant components does not exceed 10% of the vibration amplitude of the first dominant component, then the first dominant component is taken as the optimal dominant component. If the time-domain amplitude curve is not in the form of a short pulse, and the vibration amplitude of the second dominant component in the sorted multiple dominant components exceeds 10% of the vibration amplitude of the first dominant component, then the first dominant component and the second dominant component are taken as the optimal dominant component. If the time-domain amplitude curve is in the form of a short pulse, and the number of dominant components among the sorted dominant components is greater than or equal to three, then the first three dominant components are taken as the optimal dominant components; if the number of dominant components among the sorted dominant components is less than three, then all the dominant components among the sorted dominant components are taken as the optimal dominant components.

3. The method for identifying process parameters of an ultrasonic-assisted cutting device under high load according to claim 2, characterized in that, The step of calculating the displacement ratio based on the vibration amplitude corresponding to the optimal dominant component includes: Two points are randomly selected from the ultrasonic amplitude transformer in the ultrasonic-assisted cutting device, one of which is used as the observation point and the other as the target point; Obtain the vibration amplitude of the optimal dominant component corresponding to the mode shape at the observation point; Obtain the vibration amplitude of the optimal dominant component corresponding to the mode shape at the target point; If the optimal dominant component is only the first dominant component, then the first displacement ratio is calculated based on the vibration amplitude of the optimal dominant component corresponding to the mode shape at the observation point and the vibration amplitude of the optimal dominant component corresponding to the mode shape at the target point: ； If the optimal dominant component is the first dominant component and the second dominant component, then the second displacement ratio is calculated based on the vibration amplitude of the optimal dominant component corresponding to the mode shape at the observation point and the vibration amplitude of the optimal dominant component corresponding to the mode shape at the target point: ， ； If the optimal dominant components are the first three dominant components, then the third displacement ratio is calculated based on the vibration amplitude of the optimal dominant component corresponding to the mode shape at the observation point and the vibration amplitude of the optimal dominant component corresponding to the mode shape at the target point: ， ， ； in, Indicates the first The vibration amplitude of the optimal dominant component corresponding to the mode shape. This represents the first displacement ratio corresponding to the first dominant component. This represents the ratio of the second displacement to the first dominant component. This represents the ratio of the second displacement corresponding to the second dominant component. This represents the ratio of the third displacement to the first dominant component. This represents the ratio of the third displacement to the second dominant component. This represents the third displacement ratio corresponding to the third dominant component. This indicates the first observation point A. The vibration amplitude of the optimal dominant component corresponding to the mode shape. Indicates the first [unclear] of target point B The vibration amplitude of the optimal dominant component corresponding to the mode shape.

4. The method for identifying process parameters of an ultrasonic-assisted cutting device under high load according to claim 1, characterized in that, The calculation of the average unit cutting force amplitude under each first working condition based on the cutting force and vibration amplitude under each first working condition includes: Obtain the average cutting force, maximum cutting force, minimum cutting force, average vibration amplitude, maximum vibration amplitude, and minimum vibration amplitude under each of the first working conditions; Based on the average cutting force, the maximum cutting force, the minimum cutting force, the average vibration amplitude, the maximum vibration amplitude, and the minimum vibration amplitude, the average unit cutting force amplitude under each first working condition is calculated as follows: in, This represents the average unit cutting force amplitude under each of the first operating conditions. This represents the average vibration amplitude. This indicates the maximum value of the vibration amplitude. This represents the minimum value of the vibration amplitude. This represents the average cutting force. This indicates the maximum value of the cutting force. This represents the minimum value of the cutting force.

5. The method for identifying process parameters of an ultrasonic-assisted cutting device under high load according to claim 1, characterized in that, The unit cutting force under each of the second operating conditions is calculated as follows: in, This represents the unit cutting force under each of the second operating conditions. This represents the actual cutting force under each of the second operating conditions. This represents the depth of cut under each of the second working conditions. This represents the feed rate under each of the second operating conditions.

6. The method for identifying process parameters of an ultrasonic-assisted cutting device under high load according to claim 5, characterized in that, The fitting formula is obtained as follows: in, This represents the coefficient of fit in a multiple regression.

7. The method for identifying process parameters of an ultrasonic-assisted cutting device under high load according to claim 6, characterized in that, The vibration amplitude of the cutting point of the ultrasonic-assisted cutting device is calculated as follows: in, This indicates the vibration amplitude at the cutting point of the ultrasonic-assisted cutting device. Indicates the displacement ratio. This represents the average unit cutting force amplitude under the comprehensive first working condition.

8. A process parameter identification system for an ultrasonic-assisted cutting device under high load, characterized in that, The process parameter identification system for the ultrasonic-assisted cutting device under high load includes: The data acquisition unit is used to acquire multiple vibration modes under the ultrasonic-assisted cutting device, as well as the time-domain amplitude curves of the multiple vibration modes, the vibration amplitude of each vibration mode, and multiple dominant components. A dominant component sorting unit is used to sort the multiple dominant components according to the vibration amplitude of each mode, so as to obtain the sorted multiple dominant components. The dominant component selection unit is used to select several optimal dominant components from the sorted dominant components according to the time-domain amplitude curve. The displacement ratio calculation unit is used to calculate the displacement ratio based on the vibration amplitude corresponding to the optimal dominant component. The first amplitude calculation unit is used to obtain the cutting force and vibration amplitude under various first working conditions, and to calculate the average unit cutting force amplitude under each first working condition based on the cutting force and vibration amplitude under each first working condition; and to sum and average the average unit cutting force amplitude under each first working condition to obtain the average unit cutting force amplitude under the comprehensive first working conditions. A calculation fitting unit is used to obtain the actual cutting force, depth of cut, and feed rate under various second working conditions, and to calculate the unit cutting force under each second working condition based on the cutting force, depth of cut, and feed rate under each second working condition; and to fit the unit cutting force, the depth of cut, and the feed rate under each second working condition to obtain a fitting formula; The second amplitude calculation unit is used to calculate the vibration amplitude of the cutting point of the ultrasonic-assisted cutting device based on the average unit cutting force amplitude under the comprehensive first working condition, the fitting formula, and the displacement ratio.

9. A process parameter identification device for ultrasonic-assisted cutting under high load, characterized in that, It includes at least one control processor and a memory for communicatively connecting to the at least one control processor; the memory stores instructions executable by the at least one control processor, which, when executed by the at least one control processor, enable the at least one control processor to perform the process parameter identification method for ultrasonic-assisted cutting device under high load as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions for causing a computer to perform the process parameter identification method for an ultrasonic-assisted cutting device under high load as described in any one of claims 1 to 7.

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