Ball screw whirl-milling stability prediction method and system

Abstract

The application provides a ball screw whirlwind milling stability prediction method and system, and relates to the technical field of ball screw machining. The method comprises the following steps: obtaining the deformation, equivalent stress diagram and harmonic amplitude simulation values of multiple parts of the ball screw under multiple cutting force excitations; preliminarily predicting whether the current part of the ball screw will vibrate; if yes, judging whether the stress value of the current part of the ball screw is the maximum value under the corresponding cutting force excitation and whether the harmonic amplitude simulation value is the maximum value under the corresponding cutting force excitation based on the equivalent stress diagram and the harmonic amplitude simulation value of the current part of the ball screw; and if yes, finally determining that the current part of the ball screw has a vibration risk. The application can predict the vibration phenomenon by analyzing the parameter changes of the screw in the machining process, can predict the unstable factors in the machining process in advance, can optimize the process parameters, can inhibit or reduce the influence of the deformation and vibration on the machining process, and can improve the product quality.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of ball screw machining, and particularly relates to a ball screw whirlwind milling stability prediction method and system. BACKGROUND

[0002] Ball screws are key components in numerical control machine tools, and the machining precision of the "thread" thereof is particularly important. Compared with traditional grinding processes, whirlwind milling machining technology can timely remove chips, avoids the problem of low machining surface precision caused by a large amount of cutting heat generated at the machining position, and has the advantages of high cutting speed and high machining efficiency, can greatly shorten the machining cycle, and can increase the machining speed by 2-3 times, and does not require a large amount of cutting fluid and cooling fluid. Therefore, as an economical, efficient, green and high-precision machining technology, whirlwind milling machining has become a modern machining method that can replace traditional grinding machining.

[0003] At present, research on ball screw whirlwind milling machining mainly focuses on the cutting stroke precision, machining process and machining trajectory planning, and there is little research on the stability prediction in the whirlwind milling process. The chatter phenomenon occurring in machining will greatly affect the machining precision and the normal progress of machining, and in severe cases, will also cause phenomena such as tool breakage. SUMMARY

[0004] To overcome the deficiencies of the prior art, the application provides a ball screw whirlwind milling stability prediction method and system, a dynamic model is established for the cutting process by using an ANSYS system, the chatter phenomenon is predicted by analyzing the parameter changes of the screw during the machining process, the unstable factors in machining can be predicted in advance, the process parameters are optimized, the influence of deformation and vibration on the machining process is inhibited or reduced, and the product quality is improved.

[0005] To achieve the above object, one or more embodiments of the application provide the following technical scheme:

[0006] The application provides a ball screw whirlwind milling stability prediction method in a first aspect.

[0007] The ball screw whirlwind milling stability prediction method comprises the following steps:

[0008] The whirlwind milling of the ball screw is simulated, and simulation values of the deformation, equivalent stress diagram and harmonic resonance amplitude of multiple positions of the ball screw under multiple cutting force excitations are obtained;

[0009] The theoretical deformation values of each position of the ball screw under each cutting force excitation are calculated, the maximum theoretical deformation value is selected as a first criterion, and based on the simulation value of the deformation of the current position of the ball screw and the first criterion, it is preliminarily predicted whether the chatter will occur at the current position of the ball screw.

[0010] If yes, based on the equivalent stress diagram and the simulation value of the resonant amplitude of the current position of the ball screw, it is judged whether the stress value of the current position of the ball screw is the maximum under the corresponding cutting force excitation, and whether the simulation value of the resonant amplitude is the maximum under the corresponding cutting force excitation.

[0011] If yes, it is finally determined that the current position of the ball screw has a chatter occurrence risk, and the stability of the whirlwind milling of the current position of the ball screw is evaluated based on the chatter occurrence risk.

[0012] The second aspect of the present application provides a ball screw whirlwind milling stability prediction system.

[0013] The ball screw whirlwind milling stability prediction system comprises:

[0014] The simulation module is configured to simulate the ball screw whirlwind milling, and obtain the simulation values of the deformation, the equivalent stress diagram and the resonant amplitude of multiple positions of the ball screw under multiple cutting force excitations.

[0015] The preliminary prediction module is configured to calculate the deformation theoretical value of each position of the ball screw under each cutting force excitation, select the maximum deformation theoretical value as the first criterion, and preliminarily predict whether the current position of the ball screw will chatter based on the simulation value of the deformation of the current position of the ball screw and the first criterion.

[0016] The secondary prediction module is configured to, if yes, judge whether the stress value of the current position of the ball screw is the maximum under the corresponding cutting force excitation and whether the simulation value of the resonant amplitude is the maximum under the corresponding cutting force excitation based on the equivalent stress diagram and the simulation value of the resonant amplitude of the current position of the ball screw.

[0017] The stability evaluation module is configured to, if yes, finally determine that the current position of the ball screw has a chatter occurrence risk, and evaluate the stability of the whirlwind milling of the current position of the ball screw based on the chatter occurrence risk.

[0018] The third aspect of the present application provides a computer readable storage medium having a program stored thereon, which, when executed by a processor, implements the steps of the ball screw whirlwind milling stability prediction method according to the first aspect of the present application.

[0019] The fourth aspect of the present application provides an electronic device comprising a memory, a processor and a program stored on the memory and executable on the processor, wherein the processor implements the steps of the ball screw whirlwind milling stability prediction method according to the first aspect of the present application when executing the program.

[0020] The above one or more technical solutions have the following beneficial effects:

[0021] The application provides a ball screw whirl milling stability prediction method and system, simulation values of deformation, equivalent stress diagram and resonance amplitude of multiple positions are obtained through simulation, whether the current position of the ball screw will vibrate is predicted based on the above values, a judgment logic is designed, firstly, the maximum deformation value of multiple positions of the ball screw is calculated, which is used as the first criterion, the deformation simulation value obtained through simulation is compared with the first criterion, if the difference is less than the set range, the initial judgment is true, otherwise the next position of the ball screw is directly judged, and the efficiency of prediction can be improved.

[0022] After the initial judgment, the current position of the ball screw is judged again through secondary judgment, there are two judgment steps in the process, which are whether the stress value of the current position of the ball screw is the maximum value under the corresponding cutting force excitation and whether the simulation value of the resonance amplitude is the maximum value under the corresponding cutting force excitation, if the above conditions are met, it is finally determined that the current position of the ball screw has the risk of vibration, and the accuracy of prediction is improved.

[0023] Based on the cutting frequency corresponding to the resonance amplitude of the ball screw position determined to have the risk of vibration, the corresponding cutting speed is calculated, the unstable factors in the machining process are predicted in advance, the cutting speed of the tool is designed in the range of the corresponding cutting speed in the machining process, the maximum production efficiency is reached while the vibration phenomenon in the machining process is avoided as much as possible, so that the process parameters are optimized, the influence of deformation and vibration on the machining process is inhibited or reduced, and the product quality is improved.

[0024] The advantages of the additional aspects of the application will be partially given in the following description, partially become obvious from the following description, or be known by the practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0025] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the application, and together with the description of the exemplary embodiments of the application and the explanation thereof serve to explain the application, and do not constitute an improper limitation of the application.

[0026] Figure 1 The method flowchart is the first embodiment.

[0027] Figure 2 The schematic diagram is for setting cutting force for different positions of the ball screw.

[0028] Figure 3 The overall flowchart is for vibration occurrence prediction. DETAILED DESCRIPTION

[0029] It should be noted that the following detailed description is exemplary in nature and is intended to provide further description of the application. 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.

[0030] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application.

[0031] In the case of no conflict, the embodiments in the application and the features in the embodiments can be combined with each other.

[0032] Embodiment one

[0033] The embodiment discloses a ball screw whirl-milling stability prediction method.

[0034] As Figure 1 shown, the embodiment mainly predicts the whirl-milling stability of the ball screw through three judgment steps, including a preliminary prediction process and a secondary prediction process, wherein the preliminary prediction process includes one judgment step, and the secondary prediction process includes two judgment steps. Before the preliminary prediction, firstly, the machining process of the whirl-milling of the ball screw needs to be simulated.

[0035] Specifically, the embodiment predicts the chatter occurrence risk in the whirl-milling machining process of the ball screw based on the ANSYS simulation software, and then evaluates the whirl-milling stability of the current part of the ball screw. Overall:

[0036] As Figure 1 shown, firstly, the tool and the machining object required by the experiment are modeled by using SOILDWORKS; then the model is imported into the ANSYS system, the ball screw is clamped in the actual machining process by applying a fixed load, the cutting force in the cutting process is calculated by a formula, and the parameter setting is completed; after the parameter setting is completed, the modal parameters of the system are obtained by using the harmonic response analysis (since the rotational motion of the cutter head in the whirl-milling machining process of the ball screw has a certain frequency, the harmonic response analysis can better reflect the periodic frequency conversion of the cutting force suffered by the ball screw at a certain point), which is the basis of the stability analysis, so as to reflect the vibration phenomenon of the ball screw; then the response result is output, and the chatter occurrence in the machining process is judged through the deformation, stress and harmonic analysis result of the ball screw in the machining process.

[0037] In the simulation process, firstly, according to the characteristics of whirlwind milling of ball screw, the cutting force (calculated by formula) is applied at different positions of the ball screw, such as the machining starting point, one-third along the machining direction, and the middle of the ball screw, to simulate the dynamic force of the ball screw in the machining process; at the same time, constraints are applied at both ends to meet the clamping of the screw during machining. Then, according to the achievable speed range of the cutter cutting speed, the frequency response range in the harmonic response analysis is determined. Finally, after setting the cutting force, constraint conditions, and cutting frequency range, the deformation, stress, and harmonic frequency response of the ball screw under whirlwind milling are output, and the above preliminary prediction process and secondary prediction process are analyzed to finally predict whether the current position of the ball screw will occur chatter phenomenon during machining, and the stability of the current position of the ball screw during machining is evaluated.

[0038] If there is no risk of chatter occurrence at the current position, it is considered that the stability of the current position is good, and then the next position of the ball screw is judged in a cycle until all the set positions are judged; if there is a risk of chatter occurrence at the current position, it is considered that the stability of the current position is poor.

[0039] Next, the implementation process of the present embodiment will be described in detail:

[0040] Step 1, establish a three-dimensional model

[0041] In the present embodiment, the SOILDWORKS software is used to establish the model of the ball screw.

[0042] The model established meets the actual production requirements, and the material, screw length, radius size of the cutting thread line, load characteristics and overall length of the nut part are set according to the actual product.

[0043] Step 2, ANSYS simulation

[0044] (1) define fixed load

[0045] Before the harmonic response analysis of ANSYS, the whole screw is first meshed, and after the meshing is completed, the fixed support is added to the screw, and the actual experimental fixing method is combined with the V-shaped follow-up clamp clamping. In the simulation process, the right end is subjected to axial fixed support, and the screw is tightly clamped to ensure that it does not move forward and backward during machining. The left end is subjected to overall fixed support to achieve the effect of V-shaped follow-up clamp clamping.

[0046] (2) whirl milling process analysis based on cutting force

[0047] The whirlwind milling of ball screw is a process in which the rapid rotation of the cutter is the main movement and the movement of the cutter is the feed movement, so the cutting force generated in the process is mainly composed of three forces: the main cutting force Fc , back force F p , feed force F f . Since the back force and feed force are less than half of the main cutting force during the whirlwind milling process, these two forces are calculated as half of the main cutting force for convenience.

[0048] Based on the processing characteristics of whirlwind milling, the cutter has a feed motion on the screw to rotate the ball screw at different positions. In order to ensure the accuracy of the simulation results, the three forces are set at multiple positions of the ball screw for analysis, including the starting point of the screw cutting, the one-third of the starting point along the feed direction, and the middle position of the screw. The cutting force settings are shown in Figure 2 (a)- Figure 2 (c) shown in the figure, respectively, for the starting point of the ball screw processing, one-third along the processing direction, and the middle of the ball screw.

[0049] (3) Dynamic parameter setting

[0050] In the ANSYS system, the harmonic response analysis of the screw reflects the vibration response characteristics during the processing. Unlike other forms of vibration analysis, harmonic response analysis analyzes the vibration of the screw under such forces by applying a force with a periodic sinusoidal function. This periodic sinusoidal function can simulate the cutting force of the screw during whirlwind milling.

[0051] (4) Frequency interval setting

[0052] Since whirlwind milling also has the characteristic of fast rotation of the cutter head, the dynamic frequency response interval is set, corresponding to the rotation speed interval of the cutter head. The average power P c of the main shaft motor during actual processing is recorded to estimate the size of the main cutting force. Assuming that the output power of the motor is fully converted into the main cutting force, the main cutting force F c is related to the output power of the main shaft motor, which can be represented by the following formula:

[0053]

[0054] where V c represents the cutting speed (m / min).

[0055] Step 3, output response and data analysis

[0056] There are many physical data that can reflect the strength of ball screw chatter, such as the change of tool back engagement, the amplitude of ball screw, the strength change of stress on ball screw, etc. In this simulation analysis, the deformation of ball screw, the change of equivalent stress and the amplitude of resonance are used to reflect the strength of ball screw chatter in the machining process.

[0057] (1) Deformation

[0058] Ball screw will be elastically deformed in the machining process, including axial tension and compression deformation, torsional deformation and bending deformation. The bending deformation can be divided into bending deformation in the vertical plane and bending deformation in the horizontal plane. Because there are the following characteristics when ball screw is rotated: the feed speed along the workpiece axis is much smaller than the circumferential feed speed, the main cutting force is much smaller than the weight of the workpiece, so the axial tension and compression deformation and the bending deformation in the horizontal plane can be ignored, while the torsional deformation and the bending deformation in the vertical plane will cause the ball screw stroke deviation e n and e w , which are given by the following formula:

[0059]

[0060] Where T c is the workpiece driving torque, L is the maximum distance from the workpiece cutting point to the machine tool headstock end, P h is the nominal lead of the ball screw, G is the shear modulus of the workpiece material, I p is the polar moment of inertia of the workpiece cross section, θ is the bending angle of the cross section at the cutting point, and d0 is the nominal diameter of the ball screw.

[0061] According to the ANSYS deformation response obtained by the foregoing various cutting force settings, the deformation of the ball screw at different machining positions is analyzed. The e n and e w values under the excitation of various cutting forces are calculated to find out under which cutting force setting the maximum value appears at which position of the ball screw, and then prove that the maximum deformation occurs at this position and use it as the basis for judging whether the ball screw chatter occurs in the machining process. For convenience of description, the maximum theoretical value of deformation among the theoretical values of deformation at multiple positions under the excitation of various cutting forces is called the first criterion.

[0062] It can be understood that the maximum e n and e w at multiple positions corresponding to each cutting force excitation are used as the first criterion, that is, to find a cutting force condition and the maximum e n and e w value (corresponding to the maximum deformation) at a certain position of the ball screw under this condition.

[0063] The simulation values obtained by ANSYS output response are compared with the maximum en 、e w The values (i.e. the first criterion) are compared respectively, and if the results of the two calculations differ by more than 5%, it indicates that the ANSYS output result error of the cutting force setting is large, i.e. the part of the ball screw does not meet the condition of chatter occurrence, then the next screw part is set with the cutting force and the same calculation and judgment as above.

[0064] (2) Equivalent stress

[0065] Based on the finite element calculation and analysis of ANSYS, the equivalent stress diagram of the ball screw is obtained, and it is determined that which part of the screw produces the maximum stress under the cutting force setting, thereby further confirming where the chatter occurs in the screw.

[0066] On the basis of the previous step, the equivalent stress of the ball screw when it is machined to the position of maximum deformation is obtained from the equivalent stress diagram, i.e. the maximum stress corresponding to each cutting force excitation in the equivalent stress diagram, which is used as the basis for judging whether the ball screw occurs chatter in the machining process. For convenience of expression, it is called the second criterion.

[0067] In the comparison and judgment, the equivalent stress simulation value of the current part of the ball screw is compared with the size of the second criterion, so as to determine whether the current part of the ball screw is the maximum stress position of the second criterion.

[0068] (3) Resonance amplitude and frequency analysis

[0069] Since the equivalent stress of the ball screw is basically consistent with the frequency and size of the back force F p , and the deformation of the screw is greatly affected by the main cutting force and the back force during the machining process, while the equivalent stress of the screw is mainly affected by the back force, therefore the size and frequency of the back force and the main cutting force are the main factors affecting the vibration phenomenon of the screw during the machining process. The greater the cutting frequency, the greater the maximum stress and maximum deformation, and the ball screw is more likely to produce chatter during the machining process.

[0070] Therefore, during the whirlwind milling machining of the screw, the rotational speed of the tool, i.e. the cutting frequency, is the key factor for the generation of screw chatter phenomenon. The cutting speed of whirlwind milling can be calculated by the following formula:

[0071]

[0072] Where f t is the single-tooth frequency.

[0073] Based on the simulation value of the resonant amplitude of the current position of the ball screw, the maximum value in the resonant amplitude is taken as a third criterion, the size of the simulation value of the resonant amplitude of the current position of the ball screw and the third criterion is judged, and a final judgment result of whether chatter occurs is obtained. If the simulation value of the resonant amplitude of the current position of the ball screw is the same as the size of the third criterion, it is judged that the current position of the ball screw will occur chatter.

[0074] Therefore, different cutting frequencies can be taken as inputs of the harmonic response analysis, so that the resonant amplitudes and frequencies under different conditions are obtained, and according to this, the cutting speed interval that maximizes the influence of the screw vibration is obtained. That is, based on the cutting frequency corresponding to the resonant amplitude of the position of the ball screw where it is finally determined that there is a risk of chatter occurrence, the corresponding cutting speed is calculated, that is, the cutting speed that can maximize the influence of the screw vibration.

[0075] As shown in Figure 3 According to the judgment and analysis of the above three aspects, a specific judgment process of chatter occurrence can be summarized, and according to the flowchart, the position of the ball screw where chatter occurs and the corresponding cutting speed interval V can be finally obtained. In the machining process, the cutting speed of the tool can be designed to avoid this range, so as to maximize the production efficiency while avoiding the occurrence of chatter phenomenon in the machining process as much as possible.

[0076] It is worth noting that under each kind of cutting force excitation of the ball screw, the deformation, equivalent stress diagram and simulation value of the resonant amplitude of multiple positions of the ball screw are simulated. Under each kind of cutting force excitation, there is a maximum deformation simulation value in the deformation simulation values of multiple positions; there is a maximum equivalent stress simulation value in the equivalent stress diagrams of multiple positions; and there is a maximum resonant amplitude simulation value in the resonant amplitudes of multiple positions.

[0077] Embodiment Two

[0078] The embodiment discloses a ball screw cyclone milling stability prediction system.

[0079] The ball screw cyclone milling stability prediction system comprises:

[0080] The simulation module is configured to simulate the ball screw cyclone milling, and obtain the deformation, equivalent stress diagram and simulation value of the resonant amplitude of multiple positions under multiple cutting force excitations of the ball screw;

[0081] The preliminary prediction module is configured to calculate the deformation theoretical value of each position of the ball screw under each kind of cutting force excitation, select the maximum deformation theoretical value as a first criterion, and preliminarily predict whether the current position of the ball screw will occur chatter based on the simulation value of the deformation of the current position of the ball screw and the first criterion.

[0082] The secondary prediction module is configured to: if yes, judge whether the stress value of the current position of the ball screw is the maximum value under the corresponding cutting force excitation and whether the simulation value of the resonance amplitude is the maximum value under the corresponding cutting force excitation based on the equivalent stress diagram and the simulation value of the resonance amplitude of the current position of the ball screw.

[0083] The stability evaluation module is configured to: if yes, finally determine that the current position of the ball screw has a risk of chatter occurrence, and evaluate the stability of the whirlwind milling of the current position of the ball screw based on the risk of chatter occurrence.

[0084] Embodiment three

[0085] An object of the embodiment is to provide a computer-readable storage medium.

[0086] A computer-readable storage medium has a computer program stored thereon, and the program is executed by a processor to implement the steps in the ball screw whirlwind milling stability prediction method according to Embodiment 1 of the present disclosure.

[0087] Embodiment four

[0088] An object of the embodiment is to provide an electronic device.

[0089] An electronic device includes a memory, a processor, and a program stored on the memory and executable on the processor, and the processor implements the steps in the ball screw whirlwind milling stability prediction method according to Embodiment 1 of the present disclosure when executing the program.

[0090] The steps and methods involved in the devices of Embodiments Two, Three, and Four above correspond to Embodiment One, and the specific embodiments can be referred to the relevant description part of Embodiment One. The term “computer-readable storage medium” should be understood to include a single medium or multiple media of one or more instruction sets; it should also be understood to include any medium that can store, encode, or carry instruction sets for execution by a processor and cause the processor to perform any of the methods in the present disclosure.

[0091] Those skilled in the art should understand that each module or step of the present disclosure described above can be implemented by a general computer device, and alternatively, they can be implemented by program code executable by a computing device, so that they can be stored in a storage device for execution by a computing device, or they can be respectively manufactured into individual integrated circuit modules, or a plurality of modules or steps among them can be manufactured into a single integrated circuit module. The present disclosure is not limited to any specific combination of hardware and software.

[0092] Although the above describes the specific embodiments of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without any creative work are still within the scope of protection of the present invention.

Claims

1. A ball screw whirl milling stability prediction method, characterized in that: The following steps are involved: Simulate the whirlwind milling of a ball screw to obtain the deformation, equivalent stress diagram, and simulation values ​​of the resonant amplitude of multiple parts of the ball screw under various cutting force excitations; Calculate the theoretical deformation value of each part of the ball screw under each cutting force excitation, select the maximum theoretical deformation value as the first criterion, and based on the simulation value of the deformation of the current part of the ball screw and the first criterion, preliminarily predict whether the current part of the ball screw will vibrate. If so, based on the equivalent stress diagram of the current part of the ball screw and the simulated value of the resonant amplitude, it is determined whether the stress value of the current part of the ball screw is the maximum value under the corresponding cutting force excitation, and whether the simulated value of the resonant amplitude is the maximum value under the corresponding cutting force excitation; If so, it is finally determined that there is a risk of vibration at the current position of the ball screw. Based on the risk of vibration, the stability of cyclone milling at the current position of the ball screw is evaluated.

2. The ball screw whirling milling stability prediction method according to claim 1, wherein: The calculation method of the deformation theory value is: Ignore axial tensile and compressive deformation and bending deformation in the horizontal plane, and consider the stroke deviation of the ball screw caused by torsional deformation and bending deformation in the vertical plane. and , calculate the theoretical deformation value of the ball screw.

3. The ball screw whirling milling stability prediction method according to claim 2, wherein: The theoretical deformation value of the ball screw is calculated as follows: in, is the workpiece driving torque, is the maximum distance between the cutting point of the workpiece and the end of the machine headstock, is the nominal lead of the ball screw, Shear modulus of the workpiece material, Polar moment of inertia of the workpiece cross section, is the cross-section bending angle at the cutting point, is the nominal diameter of the ball screw.

4. The ball screw whirling milling stability prediction method according to claim 1, wherein: If the difference between the simulated value of the ball screw deformation and the first criterion is smaller than the set range, it is preliminarily judged that the current position of the ball screw will vibrate; otherwise, it is judged that the current position of the ball screw will not vibrate, and the next position of the ball screw is judged.

5. The ball screw whirling milling stability prediction method according to claim 1, wherein: Based on the cutting frequency corresponding to the resonance amplitude of the ball screw where the chatter risk is finally determined, the corresponding cutting speed is calculated: in, is the single tooth frequency; is the nominal diameter of the ball screw; is the cutting speed.

6. The ball screw whirling milling stability prediction method according to claim 1, wherein: Perform whirling milling simulation on a ball screw, including: Create 3D models of the tool and ball screw; Import the 3D model into finite element simulation software and apply a fixed load to the ball screw to simulate the clamping of the ball screw during the actual machining process. Calculate the cutting force during the cutting process, introduce an excitation with a sinusoidal function period, set the dynamic frequency response range, and complete the parameter configuration; The harmonic response analysis method is used to obtain the simulation values ​​of the system's deformation, equivalent stress diagram and resonant amplitude.

7. The ball screw whirling milling stability prediction method according to claim 6, characterized in that: Different cutting frequencies are used as inputs for harmonic response analysis to obtain the resonance amplitude and frequency under different circumstances.

8. Ball screw whirlwind milling stability prediction system, characterized by: include: The simulation module is configured to: simulate the whirlwind milling of the ball screw, and obtain the deformation, equivalent stress diagram and simulation value of the resonance amplitude of multiple parts of the ball screw under various cutting force excitations; The preliminary prediction module is configured to calculate the theoretical deformation value of each part of the ball screw under each cutting force excitation, select the maximum theoretical deformation value as the first criterion, and preliminarily predict whether the current part of the ball screw will vibrate based on the simulated deformation value of the current part of the ball screw and the first criterion; The secondary prediction module is configured to: if so, determine, based on the equivalent stress diagram of the current portion of the ball screw and the simulated value of the resonance amplitude, whether the stress value of the current portion of the ball screw is a maximum value under the corresponding cutting force excitation, and whether the simulated value of the resonance amplitude is a maximum value under the corresponding cutting force excitation; The stability evaluation module is configured to: if yes, finally determine that there is a risk of vibration at the current position of the ball screw, and based on the risk of vibration, evaluate the stability of the whirlwind milling of the current position of the ball screw.

9. A computer-readable storage medium having a program stored thereon, characterized in that: When the program is executed by a processor, the steps of the ball screw whirling milling stability prediction method according to any one of claims 1 to 7 are implemented.

10. An electronic device comprising a memory, a processor, and a program stored in the memory and executable on the processor, wherein: When the processor executes the program, the steps of the ball screw whirling milling stability prediction method according to any one of claims 1 to 7 are implemented.

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