Cutter bar structure optimization method and device and storage medium

Abstract

The invention provides a cutter bar structure optimization method and device and a storage medium, and relates to the technical field of cutting machining. The method comprises the following steps: acquiring a three-dimensional structure model of a cutter bar; performing mechanical structure simulation and modal analysis on the three-dimensional structure model based on the target working condition to obtain a mechanical response parameter and a modal parameter of the cutter bar; and adjusting the three-dimensional structure model based on the mechanical response parameters and the modal parameters until the three-dimensional structure model accords with an optimization target to obtain an optimized three-dimensional structure model. The performance of the cutter bar structure model under the load and vibration is analyzed through fusion of mechanical structure simulation and modal analysis, the cutter vibration risk is effectively reduced while the structural strength of the cutter bar is guaranteed, and design and optimization of the cutter bar structure are achieved at low cost and high efficiency.

Description

Technical Field

[0001] This application relates to the field of cutting processing technology, and particularly relates to a method, device, and storage medium for optimizing the structure of a tool shank. Background Art

[0002] In the field of cutting processing, as the main structure for mounting the cutting blade on the tool, the tool shank is usually one of the key structures for design and optimization. Due to the limitations of available tool shank materials and mature processing technologies, designers usually rely on experience and simple structural strength calculations to complete the design and optimization of the tool shank, and make feedback adjustments through actual production and cutting experiments.

[0003] With the enrichment of processing technologies and the complexity of tool usage conditions, the requirements for the design and optimization of tool products are getting higher and higher. For example, the tool shank uses a combination of multiple materials or installs sensors inside the turning tool shank to monitor the tool usage conditions, etc. The structural design and optimization of the tool need to comprehensively consider factors such as material selection, three-dimensional structure design, and oscillation frequency.

[0004] Therefore, the previous method of simply relying on experience to give reasonable parameters in the design and optimization of the tool shank structure can no longer meet the optimization goals under complex working conditions, and actual production and cutting experiments will increase the R & D cost and R & D cycle. Summary of the Invention

[0005] To achieve the above object, this application provides a method, device, and storage medium for optimizing the structure of a tool shank, which can effectively reduce the risk of tool chatter while ensuring the structural strength of the tool shank, without the need for large-scale actual production and cutting experiment investment, and significantly shorten the R & D cycle and reduce the R & D cost.

[0006] In a first aspect, this application provides a method for optimizing the structure of a tool shank, the method comprising:

[0007] Obtain a three-dimensional structure model of the tool shank;

[0008] Perform a mechanical structure simulation on the three-dimensional structure model based on the target working condition to obtain the mechanical response parameters of the tool shank, where the mechanical response parameters include the deformation condition of the tool shank;

[0009] Perform a modal analysis on the three-dimensional structure model based on the target working condition to obtain the modal parameters of the tool shank, where the modal parameters at least include the vibration frequency of the tool shank;

[0010] Based on the mechanical response parameters and the modal parameters, adjust the three-dimensional structure model until it meets the optimization goal to obtain an optimized three-dimensional structure model.

[0011] In a possible implementation manner, the three-dimensional structure model includes the sensor installation position inside the tool shank;

[0012] Performing a mechanical structure simulation on the three-dimensional structure model based on the target working condition to obtain the mechanical response parameters of the tool shank, including:

[0013] Applying a load to the three-dimensional structure model based on the target working condition to obtain the overall structural deformation of the tool shank and the deformation of the sensor installation position.

[0014] In a possible implementation manner, performing a modal analysis on the three-dimensional structure model based on the target working condition to obtain the modal parameters of the tool shank, including:

[0015] Determining the material properties of the three-dimensional structure model based on the target working condition and applying constraints, and solving to obtain the natural frequencies of the tool shank under multiple vibration modes.

[0016] In a possible implementation manner, based on the mechanical response parameters and the modal parameters, adjusting the three-dimensional structure model until it meets the optimization goal to obtain an optimized three-dimensional structure model, including:

[0017] If the vibration frequency is within the given processing parameter range in the optimization goal, then adjusting the structural parameters and / or material matching parameters in the three-dimensional structure model until an optimized three-dimensional structure model with a vibration frequency not within the given processing parameter range is obtained;

[0018] If the deformation condition does not meet the target deformation amount in the optimization goal, then adjusting the structural parameters and / or material matching parameters of the three-dimensional structure model until an optimized three-dimensional structure model with a deformation condition meeting the target deformation amount is obtained.

[0019] In a possible implementation manner, in the case where the vibration frequency cannot avoid the given processing parameter range, the method further includes:

[0020] Adding a damping structure and / or vibration damping material to the three-dimensional structure model.

[0021] In a possible implementation manner, obtaining the three-dimensional structure model of the tool shank includes: obtaining a plurality of candidate three-dimensional structure models of the tool shank, where the sensor installation positions in the plurality of candidate three-dimensional structure models are different.

[0022] In a possible implementation manner, the method further includes:

[0023] Selecting at least one test three-dimensional structure model from the optimized three-dimensional structure models corresponding to the plurality of candidate three-dimensional structure models for tool shank production testing;

[0024] Select a target 3D structure model whose structural strength and response frequency meet the preset requirements according to the frequency response function model of the test 3D structure model under production test conditions.

[0025] In a possible implementation manner, the mechanical structure simulation and the modal analysis are implemented by any one or more finite element simulation software. The finite element simulation software includes, for example: Abaqus, ANSYS Mechanical, and Optistruct.

[0026] In a second aspect, a tool shank structure optimization device is provided. The device includes:

[0027] A modeling module, configured to: obtain a 3D structure model of the tool shank;

[0028] A structural simulation module, configured to: perform a mechanical structure simulation on the 3D structure model based on the target working condition to obtain mechanical response parameters of the tool shank, where the mechanical response parameters include the deformation condition of the tool shank;

[0029] A modal analysis module, configured to: perform a modal analysis on the 3D structure model based on the target working condition to obtain modal parameters of the tool shank, where the modal parameters at least include the vibration frequency of the tool shank;

[0030] An optimization module, configured to: adjust the 3D structure model based on the mechanical response parameters and the modal parameters until it meets the optimization goal, and obtain an optimized 3D structure model.

[0031] In a third aspect, a computing device is provided. The computing device includes a memory and a processor. The memory stores at least one program, and the at least one program is executed by the processor to implement the tool shank structure optimization method provided in the first aspect.

[0032] In a fourth aspect, a computer-readable storage medium is provided. At least one program is stored in the storage medium, and the at least one program is executed by the processor to implement the tool shank structure optimization method provided in the first aspect.

[0033] In a fifth aspect, a computer program product is provided, including a computer program / instructions. When the computer program / instructions are executed by a processor, the tool shank structure optimization method provided in the first aspect is implemented.

[0034] The technical solution provided in this application at least includes the following technical effects:

[0035] This application uses mechanical structure simulation and modal analysis to comprehensively analyze the performance of the tool shank structure model under load and vibration, which can effectively reduce the risk of tool chatter while ensuring the structural strength of the tool shank, without the need for large-scale actual production and cutting experiments, significantly shortening the R & D cycle and reducing the R & D cost. Description of the Drawings

[0036] Figure 1 is a flowchart of a method for optimizing the tool shank structure provided by an embodiment of the present application;

[0037] Figure 2 is a schematic diagram of a three-dimensional structure model of a tool shank provided by an embodiment of the present application;

[0038] Figure 3 is a schematic diagram of the deformation situation of a tool shank provided by an embodiment of the present application;

[0039] Figure 4 is a schematic diagram of importing a three-dimensional structure model of a tool shank into simulation software provided by an embodiment of the present application;

[0040] Figure 5 is a schematic diagram of the mesh layout of a three-dimensional structure model of a tool shank provided by an embodiment of the present application;

[0041] Figure 6 is a schematic diagram of the result of modal analysis provided by an embodiment of the present application;

[0042] Figure 7 is a schematic diagram of a tool shank structure optimization device provided by an embodiment of the present application;

[0043] Figure 8 is a schematic diagram of the hardware structure of a computing device provided by an embodiment of the present application.

[0044] Through the above-mentioned drawings, specific embodiments of the present application have been shown, and more detailed descriptions will be given later. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed Embodiments

[0045] To further illustrate each embodiment, the present application provides drawings. These drawings are part of the disclosure of the present application, mainly used to illustrate the embodiments, and can be used to explain the operating principle of the embodiments in conjunction with the relevant descriptions in the specification. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present application. The components in the drawings are not drawn to scale, and similar component symbols are usually used to represent similar components. The meaning of the term "at least one" in the present application is one or more, and the meaning of the term "a plurality" in the present application is two or more.

[0046] The present application will now be further described in conjunction with the drawings and specific embodiments.

[0047] In this application, the tool shank refers to a rod-shaped structure installed on a machine tool or machine for clamping a cutting tool and transmitting the cutting force to the workpiece. The design and material selection of the tool shank have a crucial impact on its performance. On the one hand, the tool shank needs to have sufficient strength and stiffness to withstand the huge cutting force and vibration generated during the cutting process and avoid fracture or deformation. On the other hand, in order to reduce the burden on the machine tool and the spindle, improve the cutting efficiency and accuracy, the tool shank also needs to be as light as possible and maintain high dynamic performance.

[0048] This application provides a tool shank structure optimization method for the defects existing in the prior art when optimizing and designing the tool shank structure under complex working conditions. The technical solutions will be described below through some embodiments.

[0049] Embodiment 1

[0050] The embodiment of this application provides a tool shank structure optimization method. Figure 1 It is a flowchart of a tool shank structure optimization method provided by the embodiment of this application. As Figure 1 shown, the method includes steps S1 to S4.

[0051] S1. Obtain the three-dimensional structure model of the tool shank.

[0052] In the embodiment of this application, the three-dimensional structure model can be generated by three-dimensional modeling software or supported to be read in the form of a file.

[0053] Among them, the reading method can be to obtain online through the network or read from the local storage according to the given path. This application is not limited to this. Exemplarily, the three-dimensional structure model file is a file with the suffix of ".step".

[0054] Among them, the three-dimensional modeling software can be, for example, UG, solidworks, CAD, etc. Optionally, if the tool design is simple or the simulation structure to be generated is simple, the model file given by the model library or other data sources can also be directly used. This application is not limited to this.

[0055] In a possible implementation manner, the tool shank is a tool shank with an embedded sensor implemented based on machining technology and 3D printing technology. The tool shank can be a turning tool shank, a boring tool shank or a milling cutter head, etc., and can also be an internal cooling tool shank or an external cooling tool shank. This application is not limited to this.

[0056] In the example of embedding a sensor in the tool shank, the specific implementation process of this step S1 includes: using 3D modeling software to perform the structural modeling of the tool shank. Specifically, different materials in the model are divided into different structural bodies. For the same tool shank, different sensor installation positions can be set, and after separate modeling, multiple 3D structural models can be exported from the 3D modeling software. Optionally, the sensor installation position is inside the tool shank, and parameters such as the front-back position and depth of the installation groove in the tool shank can be adjusted according to the simulation to obtain different sensor installation positions.

[0057] In a possible implementation manner, if there are multiple sensor installation positions, multiple 3D structural models with different sensor installation positions can be obtained, then this step S1 includes: obtaining multiple candidate 3D structural models. In this example, in the subsequent process, multiple candidate 3D structural models can be respectively simulated, verified, and analyzed for targeted optimization and selection.

[0058] Figure 2 is a schematic diagram of a 3D structural model of a tool shank provided by an embodiment of the present application, as Figure 2 shown, the 3D structural model of the tool shank is as Figure 2 (a) part, the sensor installation position is inside the tool shank, as Figure 2 (b) part, the area indicated by the red frame.

[0059] S2. Perform a mechanical structure simulation on the 3D structural model based on the target working condition to obtain the mechanical response parameters of the tool shank.

[0060] Among them, the target working condition describes the mutual contact relationship and processing method between the actual processing situation of the tool shank and the structures of other parts of the tool.

[0061] Among them, the mechanical response parameters include the deformation situation of the tool shank. In the embodiments of the present application, the mechanical structure simulation is a technology that predicts and analyzes the mechanical response of a structure under specific load conditions through numerical simulation methods. Exemplarily, the mechanical response parameters obtained through the mechanical structure simulation include: displacement, the deformation amount of the structure under the action of the load, which reflects the stiffness of the structure; stress, the internal force per unit area, indicating the magnitude and direction of the force inside the structure, and is an important index for evaluating the strength of the structure; strain, the relative deformation amount of the structure under the action of the load, which is closely related to the stress and jointly reflects the mechanical properties of the structure.

[0062] In the embodiments of the present application, the mechanical structure simulation mainly focuses on the mechanical response of the structure under static or dynamic loads, and the obtained parameters include displacement, stress, strain, etc.

[0063] In a possible implementation, the three-dimensional structure model includes the sensor installation positions within the tool shank. In this example, this step S2 includes: applying loads to the three-dimensional structure model based on the target working conditions to obtain the overall structural deformation of the tool shank and the deformation of the sensor installation positions.

[0064] Specifically, the process of implementing this step S2 through simulation software includes:

[0065] a. Apply concentrated loads to the cutting part of the tool. For example: in the feed direction: 900 N, in the depth of cut direction: 700 N, in the main cutting direction: 1200 N; apply uniform loads to the clamping area: 5000 MPa.

[0066] b. Select the static analysis module in the simulation software to obtain the cutting deformation of the tool shank under the target working conditions, and view the overall structural deformation of the tool shank and the deformation amount of the sensor installation positions. According to the deformation amount, it can be judged that while the overall structure of the designed tool shank meets the usage requirements, there is sufficient deformation at the sensor installation positions to enable the sensor to obtain a more sensitive signal excitation.

[0067] Figure 3 is a schematic diagram of the deformation of the tool shank provided by an embodiment of the present application. As Figure 3 shown, the stress points with deformation amounts show colors different from the blue background grid, and the colors show a changing trend of light green, yellow, green, and red as the deformation amount increases.

[0068] The embodiment of the present application uses mechanical structure simulation to balance the structural strength of the tool shank and the sensitivity of the sensor. Reliable structural strength can reduce overall deformation, and as large a deformation space as possible at the sensor installation positions can ensure that the sensitivity of the sensor is not affected.

[0069] In a possible implementation, steps S2 and S3 can be executed through different modules in the simulation software respectively. Therefore, there is no need to follow a fixed order. That is, step S2 can be executed before step S3 or after step S3.

[0070] Before executing steps S2 and S3, first import the three-dimensional structure model of the tool shank into the simulation software to complete the configuration of the simulation task. Optionally, the mechanical structure simulation and modal analysis are implemented through any one or more finite element simulation software. Finite element simulation software is a tool for engineering and scientific calculations, and through the finite element (FEM) method, it performs complementary numerical simulations on complex engineering problems. The finite element simulation software involved in the present application includes, for example: Abaqus, ANSYS Mechanical, and Optistruct.

[0071] Specifically, taking the Abaqus software as an example, after the three-dimensional structural model of the tool shank is input, the positions of different materials of the tool shank are assigned based on the target working conditions, the material mechanics parameters of the materials are given to the corresponding structures, the positions of different structures of the tool shank are adjusted, and the tool shank is assembled. Further, the mutual contact relationships between different structures are clarified, and corresponding constraints are applied to the tool shank structure based on the target working conditions. After the constraints are applied, a mesh is distributed for the tool shank model, the details area and the deformation area that needs to be focused on are refined for meshing, and the simulation task is submitted. Figure 4 It is a schematic diagram of importing the three-dimensional structural model of the tool shank into the simulation software provided by an embodiment of the present application. Figure 5 It is a schematic diagram of the mesh layout of the three-dimensional structural model of the tool shank provided by an embodiment of the present application.

[0072] In a possible implementation manner, the involved materials include but are not limited to metal materials such as 42CrMo, 40CrNiMo, H13, 718H, 7075, TC4, 304, etc.; if the structure must be designed for vibration suppression to relieve the amplitude, non-metal materials such as polyethylene, polystyrene, vinyl chloride, rubber, etc. may also be involved.

[0073] In a possible implementation manner, the target working conditions can be specifically considered from the following aspects:

[0074] On the one hand, according to the design of different machined parts, the tool shank will have different overhangs (clamping lengths), different clamping methods (such as screw locking - concentrated load, clamp plate locking - uniform load), different clamping directions (such as lateral clamping, up and down clamping). In addition, there are also some special cold shrinking and hot shrinking fixtures for clamping the tool shank. As Figure 2 shown, Figure 2 in the figure, the clamping method of the tool shank is clamp plate locking, and the clamping direction is up and down clamping.

[0075] On the other hand, according to the machining method, for external turning, cutting and grooving turning, thread turning, etc., there are different cutting force application points, force magnitudes and force directions.

[0076] On the other hand, regarding the cutting tool inserts, different insert forms (square, diamond, equilateral triangle, etc.), insert sizes, thicknesses, etc. will also have different cutting force application points, force magnitudes and force directions.

[0077] S3. Perform modal analysis on the three-dimensional structural model based on the target working conditions to obtain the modal parameters of the tool shank.

[0078] Among them, the modal parameters at least include the vibration frequency of the tool shank. The vibration frequency specifically refers to the natural frequency of the tool shank under different machining conditions and the corresponding vibration modes. The target working conditions are used to provide constraint conditions such as material properties and actual usage conditions required for modal analysis.

[0079] In a possible implementation, the modal parameters include the natural frequencies of the tool shank under multiple vibration modes. Then, this step S3 includes: determining the material properties of the three-dimensional structural model based on the target working conditions and applying constraints, and solving to obtain the natural frequencies of the tool shank under multiple vibration modes.

[0080] Specifically, finite element analysis software (such as ANSYS, etc.) can be used for modal analysis. First, set the properties of the tool shank material in the software, including elastic modulus, density, Poisson's ratio, etc. The applied constraints include: Then, according to the actual usage of the tool shank (refer to the introduction of the target working conditions in step S2), apply corresponding constraints in the software. For example, if the tool shank is clamped on the tool holder, full constraints need to be applied to the contact surface between the tool shank and the tool holder. Finally, calculate the natural frequencies and vibration modes and other modal parameters of the tool shank through modal analysis. Optionally, select an appropriate solution method in the software, such as the Block Lanczos method, etc., for solving the natural frequencies and vibration modes of the tool shank. Enough modal orders can also be extended as needed to capture all important modes. Figure 6 is a schematic diagram of the modal analysis results provided by an embodiment of the present application, as Figure 6 shown, the obtained model parameters include the natural frequencies "frequency" under multiple different vibration modes.

[0081] The embodiment of the present application uses modal analysis to adjust the frequency response of the tool shank design and avoid machining vibration.

[0082] S4. Based on the mechanical response parameters and modal parameters, adjust the three-dimensional structural model until it meets the optimization goal, and obtain the optimized three-dimensional structural model.

[0083] In a possible implementation, the optimization goal includes at least one of the following aspects:

[0084] I. Material

[0085] Main body material: The main body material of the tool shank needs to be hard enough and have toughness to withstand various pressures during cutting and prevent deformation or fracture. Surface coating: The coating needs to have wear resistance and rust resistance to protect the surface of the tool shank from the effects of cutting and corrosion.

[0086] II. Shape and dimensions

[0087] Shape design: The shape of the tool shank should be customized according to the machining requirements, including the length, diameter of the tool shank, the shape and size of the tool installation part (such as holes, grooves, etc.), and the positional relationship and proportional relationship of each part of the tool shank. Dimension accuracy: The dimensions of the tool shank, including the error ranges of dimensions such as length and diameter, need to be very small to ensure the fit with the machine tool or tool.

[0088] III. Seismic performance

[0089] Structural design: The internal structure of the tool shank should be reasonable and have seismic performance to prevent vibration during the action of cutting force, which may affect the machining quality. Stability of the connection part: The connection part between the tool shank and the tool needs to be stable to prevent the tool from loosening during the machining process, which may affect the machining accuracy.

[0090] IV. Durability

[0091] Deformation resistance: The tool shank should not deform easily during long-term use to ensure the dimensional stability of machining.

[0092] Fatigue resistance: The tool shank needs to be able to withstand multiple cutting tasks without fatigue phenomena such as small cracks.

[0093] V. Special design requirements

[0094] Vibration damping design: For specific machining requirements, the tool shank needs to be designed with a vibration damping structure, such as a hydraulic vibration damping tool shank. The damping force is achieved through the internal friction between the hydraulic oil molecules to damp the vibration. Standardization and serialization: When designing the tool shank, its standardization and serialization should be considered to facilitate management and use, and improve the machining efficiency and quality.

[0095] In the embodiments of the present application, each three-dimensional structure model can obtain the deformation situation through step S2 and the vibration frequency through step S3. Then the corresponding optimization process includes:

[0096] S41. If the vibration frequency is within the given machining parameter range in the optimization target, adjust the structural parameters and / or material combination parameters in the three-dimensional structure model until an optimized three-dimensional structure model with a vibration frequency outside the given machining parameter range is obtained.

[0097] Specifically, it is judged according to whether the high-order frequency signal among multiple natural frequencies is within the conventional machining parameter range. If so, adjust and change the structural design and material combination of the tool shank to make the natural frequency of the tool shank avoid the frequency range of the conventional machining parameters of the tool, and avoid large vibrations during the machining process.

[0098] In a possible implementation manner, the high-order frequency of the tool shank refers to the relatively high vibration frequency of the tool shank in vibration analysis compared to the low-order frequency. In structural dynamics, the high-order frequency usually corresponds to the local vibration mode of the structure, such as the vibration of a local plate or the deformation of certain specific regions. In modal analysis, multiple natural frequencies and corresponding vibration modes of the tool shank will be calculated. These natural frequencies are arranged in ascending order, with the lower frequencies corresponding to the overall vibration mode and the higher frequencies corresponding to the local vibration mode.

[0099] Optionally, the vibration amplitude of the high-order frequency can be reduced by adjusting the structural dimensions of the tool shank, material selection, or strengthening the stiffness of certain areas, thereby improving cutting stability and machining quality. In addition, during the cutting process, the vibration of the high-order frequency can also be avoided by selecting appropriate cutting parameters and process conditions. The high-order frequency of the tool shank can be used to effectively evaluate the dynamic performance of the tool shank.

[0100] S42. If the deformation does not meet the target deformation amount in the optimization target, adjust the structural parameters and / or material combination parameters of the three-dimensional structure model until an optimized three-dimensional structure model with a deformation that meets the target deformation amount is obtained.

[0101] In the embodiment of the present application, for a three-dimensional structure model that does not meet the optimization target, it is necessary to adjust the tool shank structure design and material, and repeat the aforementioned steps S2 and S3 until the adjusted tool shank structure model not only meets the use requirements in the overall structure, but also has sufficient deformation space at the sensor installation position so that the sensor can obtain a more sensitive signal excitation.

[0102] In a possible implementation manner, the structural optimization design of the tool shank can be carried out by increasing the thickness of the tool shank or changing its shape, etc., to improve its natural frequency and reduce vibration.

[0103] In another possible implementation manner, the model can be adjusted according to the following optimization strategy: According to the stress distribution diagram in the simulation results, find the stress concentration areas and the parts with excessive stress. Analyze whether these areas are caused by unreasonable structural design or improper material distribution. Further check the deformation of the tool shank after being stressed, analyze whether the deformation exceeds the allowable range, and whether it will affect the cutting accuracy and tool life. Based on this, in the stress concentration area, the material thickness can be increased or a higher-strength material can be used. The stress can be dispersed and the structure can be optimized by changing the cross-sectional shape, adding support structures, etc. The deformation after being stressed can also be reduced by strengthening the rigidity of the tool shank. Optimize the support structure of the tool shank to ensure its stability during use.

[0104] According to the above optimization strategy, modify the structural model of the tool shank in the three-dimensional modeling software, and then the simulation verification and analysis can be carried out again according to steps S2 and S3. Compare the simulation results before and after optimization, and evaluate whether the optimization effect is significant. If the optimization effect is not ideal, continue to adjust the model according to the simulation results. Repeat the above steps until the requirements for the structural strength and modal frequency of the model both reach a satisfactory optimization effect.

[0105] In some possible implementation manners, when the vibration frequency cannot avoid the given processing parameter range, the method further includes: adding a damping structure and / or vibration damping material in the three-dimensional structure model. Based on this, the vibration amplitude during the processing can be reduced, and the influence of tool vibration on cutting processing and signal acquisition can be reduced.

[0106] In some embodiments, when multiple candidate three-dimensional structure models are obtained for optimization, further testing and screening are performed on the optimized three-dimensional structure models obtained for each candidate three-dimensional structure model through steps S2 to S4. The method provided by the embodiments of the present application further includes:

[0107] S51. Select at least one test three-dimensional structure model from the optimized three-dimensional structure models corresponding to the multiple candidate three-dimensional structure models for tool shank production testing.

[0108] Optionally, select 3 to 5 models with better structural strength and dynamic performance from the multiple candidate three-dimensional structure models for physical production and experimental testing.

[0109] S52. According to the frequency response function model of the test three-dimensional structure model under production test conditions, select a target three-dimensional structure model whose structural strength and response frequency meet the preset requirements.

[0110] Specifically, the tool cutting test respectively tests the repeated cutting life of the tool with different tool shanks, the deformation of the tool shank, etc., and at the same time uses modal detection equipment to perform modal analysis tests on the tool shank, clarifies the frequency response function model under its use conditions, determines that the structural deformation and frequency response of the tool shank can meet the machining conditions within the use parameter range, selects the model with the best performance among them, and finally completes the optimization of the tool shank structure.

[0111] The technical solution provided by the embodiments of the present application can realize the quantitative analysis of the tool shank structure with a sensor installed at low cost and high efficiency, making the optimization of the tool shank structure more meticulous, rather than relying on subjective experience to roughly improve the tool shank design scheme. It can not only balance the structural strength of the tool shank and the sensitivity of the sensor to the greatest extent, reduce the risk of tool chatter at the same time, and the analysis results have more prominent guiding significance for the optimization direction of the tool shank structure, facilitating R & D personnel to quickly find the reasons for different problems of the tool shank. On the other hand, reducing the actual production of tool shanks with different design schemes also synchronously reduces the amount of cutting experiments, thereby significantly shortening the R & D cost and R & D cycle.

[0112] Embodiment 2

[0113] The embodiments of the present application provide another tool shank structure optimization method, including the following steps A to D.

[0114] Step A. Use three-dimensional modeling software to complete the structural modeling of the tool shank, obtain multiple three-dimensional structure models, and each three-dimensional structure model has a different sensor installation position.

[0115] For the principle of this step A, refer to step S1 of Embodiment 1, which will not be elaborated here.

[0116] Step B: Import multiple 3D structural models of the tool shank into the simulation software, distribute grids for the tool shank model, submit the simulation task, and perform static structural simulation and free modal analysis on the tool shank respectively.

[0117] The principle of this Step B refers to Step S2 and Step S3 of Embodiment 1.

[0118] In a possible implementation manner, the mechanical structure simulation refers to the following process.

[0119] Geometric modeling: According to the structural characteristics of the actual tool shank, create its 3D geometric model in a professional simulation software (such as ANSYS). This step requires accurately reflecting the geometric shape and dimensions of the tool shank to ensure the accuracy of the simulation results.

[0120] Mesh generation: Generate meshes for the created geometric model for subsequent numerical calculations. The quality and density of the mesh directly affect the accuracy of the simulation results and the calculation efficiency. Generally, higher accuracy can be obtained by using all hexahedron meshing.

[0121] Material property definition: Specify material properties for the model, such as elastic modulus, Poisson's ratio, density, etc. These properties are crucial for the accuracy of the simulation results because they determine the mechanical properties and responses of the tool shank.

[0122] Boundary condition and load setting: Set the boundary conditions of the model, such as fixed constraints, rotational constraints, etc. At the same time, apply loads, such as displacements, forces, etc. These boundary conditions and loads should be consistent with the actual working conditions to ensure the reliability of the simulation results.

[0123] Solution: Use the solver of the simulation software to solve the model and obtain analysis results such as displacements, stresses, and strains. This step requires selecting appropriate solution methods and parameters to ensure the stability and accuracy of the solution process.

[0124] In a possible implementation manner, the modal analysis refers to the following process.

[0125] Modeling and mesh generation. Material property definition. Applying constraints: In modal analysis, usually apply zero displacement constraints as boundary conditions. This is because modal analysis focuses on the free vibration characteristics of the tool shank without external forces.

[0126] Solving for natural frequencies and vibration modes: Use the modal analysis function of the simulation software to solve the natural frequencies and vibration modes of the tool shank. These results are important bases for evaluating the dynamic performance of the tool shank.

[0127] Understandably, the principles of the three steps of "modeling and meshing", "defining material properties", and "applying constraints" in mechanical structure simulation and modal analysis are the same. In some possible implementation manners, these steps can be executed before submitting the simulation task, and then the simulation task is submitted to two different modules of mechanical structure simulation and modal analysis for solution respectively to obtain corresponding parameters.

[0128] Step C: According to the results of static structure simulation and free modal analysis, adjust the three-dimensional structure model for optimized design, and repeat steps A, B, and C until the model simultaneously meets the requirements of structural strength and modal frequency.

[0129] The principle of this step C refers to step S4 in Embodiment 1 and will not be elaborated here.

[0130] Step D: Select the top 3 to 5 solutions with the best comprehensive performance from multiple three-dimensional structure models that meet the requirements for physical production testing.

[0131] The principle of this step D refers to steps S51 and S52 in Embodiment 1 and will not be elaborated here.

[0132] Among them, the tool cutting test includes: respectively testing the repeated cutting life, tool shank deformation, etc. of tools with different tool shanks, and simultaneously using modal detection equipment to conduct modal analysis tests on the tool shank to clarify the frequency response function model under its use conditions, determine that the structural deformation and frequency response of the tool shank can meet the machining conditions within the use parameter range, select the design with the best performance among them, and finally complete the optimization of the tool shank structure.

[0133] The technical solution provided by the embodiment of the present application can realize the quantitative analysis of the tool shank structure with the installation sensor at low cost and high efficiency, making the optimization of the tool shank structure more meticulous, rather than relying on subjective experience to roughly improve the tool shank design scheme. It can not only balance the structural strength of the tool shank and the sensitivity of the sensor to the greatest extent, but also reduce the risk of chatter. Moreover, the analysis results have more prominent guiding significance for the optimization direction of the tool shank structure, facilitating R & D personnel to quickly find the reasons for different problems of the tool shank. On the other hand, reducing the actual production of tool shanks with different design schemes also synchronously reduces the amount of cutting experiments, thereby significantly shortening the R & D cost and R & D cycle.

[0134] Embodiment 3

[0135] The embodiment of the present application provides a tool shank structure optimization device. Figure 7 It is a schematic diagram of a tool shank structure optimization device provided by the embodiment of the present application. The following combines Figure 7 to introduce the tool shank structure optimization device provided by the embodiment of the present application.

[0136] The tool shank structure optimization device provided by the embodiment of the present application includes:

[0137] A modeling module 701, configured to: obtain a three-dimensional structural model of a tool shank;

[0138] A structural simulation module 702, configured to: perform a mechanical structure simulation on the three-dimensional structural model based on target working condition conditions to obtain mechanical response parameters of the tool shank, where the mechanical response parameters include the deformation condition of the tool shank;

[0139] A modal analysis module 703, configured to: perform a modal analysis on the three-dimensional structural model based on the target working condition conditions to obtain modal parameters of the tool shank, where the modal parameters at least include the vibration frequency of the tool shank;

[0140] An optimization module 704, configured to: adjust the three-dimensional structural model based on the mechanical response parameters and the modal parameters until it meets the optimization goal, to obtain an optimized three-dimensional structural model.

[0141] In a possible implementation manner, the three-dimensional structural model includes the sensor installation positions inside the tool shank;

[0142] The structural simulation module 702 is configured to: apply loads to the three-dimensional structural model based on the target working condition conditions to obtain the overall structural deformation condition of the tool shank and the deformation condition of the sensor installation positions.

[0143] In a possible implementation manner, the modal analysis module 703 is configured to: determine the material properties of the three-dimensional structural model based on the target working condition conditions and apply constraints, and solve to obtain the natural frequencies of the tool shank in multiple vibration modes.

[0144] In a possible implementation manner, the optimization module 704 is configured to:

[0145] If the vibration frequency is within the given processing parameter range in the optimization goal, then adjust the structural parameters and / or material matching parameters in the three-dimensional structural model until an optimized three-dimensional structural model with a vibration frequency not within the given processing parameter range is obtained;

[0146] If the deformation condition does not meet the target deformation amount in the optimization goal, then adjust the structural parameters and / or material matching parameters of the three-dimensional structural model until an optimized three-dimensional structural model with a deformation condition meeting the target deformation amount is obtained.

[0147] In a possible implementation manner, in the case where the vibration frequency cannot avoid the given processing parameter range, the optimization module 704 is further configured to: add a damping structure and / or vibration damping material in the three-dimensional structural model.

[0148] In a possible implementation manner, the modeling module 701 is configured to: obtain a plurality of candidate three-dimensional structure models of the tool shank, where the sensor installation positions in the plurality of candidate three-dimensional structure models are different.

[0149] In a possible implementation manner, the optimization module 704 is further configured to:

[0150] Select at least one test three-dimensional structure model from the optimized three-dimensional structure models corresponding to the plurality of candidate three-dimensional structure models for tool shank production testing;

[0151] According to the frequency response function model of the test three-dimensional structure model under production test conditions, select a target three-dimensional structure model whose structural strength and response frequency meet preset requirements.

[0152] The tool shank structure optimization device provided in the embodiment of the present application may further include more or fewer modules to execute the steps in the above tool shank structure optimization method.

[0153] It should be noted that when the tool shank structure optimization device provided in the above embodiment implements the corresponding steps, only the above division of each functional module is used for illustration. In actual application, the above functions may be allocated to different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. In addition, the tool shank structure optimization device provided in the above embodiment and the above tool shank structure optimization method belong to the same concept. For the specific implementation process, please refer to Method Embodiments 1 and 2, which will not be repeated here.

[0154] The technical solution provided in the embodiment of the present application can realize the quantitative analysis of the tool shank structure with a sensor installed at low cost and high efficiency, so that the optimization of the tool shank structure can be more detailed, rather than relying on subjective experience to roughly improve the tool shank design scheme. It can not only balance the structural strength of the tool shank and the sensitivity of the sensor to the greatest extent, but also reduce the risk of tool vibration. Moreover, the analysis result has more prominent guiding significance for the optimization direction of the tool shank structure, which is convenient for R & D personnel to quickly find the reasons for different problems of the tool shank. On the other hand, reducing the actual production of tool shanks with different design schemes also synchronously reduces the amount of cutting experiments, thereby significantly shortening the R & D cost and R & D cycle. The embodiment of the present application uses mechanical structure simulation to balance the structural strength of the tool shank and the sensitivity of the sensor. The reliable structural strength can reduce the overall deformation, and the sensor installation position has as much deformation space as possible to ensure that the sensitivity of the sensor is not affected.

[0155] The embodiment of the present application also provides a computing device for executing the above tool shank structure optimization method. Figure 8 It is a schematic hardware structure diagram of a computing device provided in the embodiment of the present application, as Figure 8As shown, the computing device includes a processor 801, a memory 802, a bus 803, and a computer program stored in the memory 802 and executable on the processor 801. The processor 801 includes one or more processing cores. The memory 802 is connected to the processor 801 via the bus 803. The memory 802 is used to store program instructions. When the processor executes the computer program, all or part of the steps in the above method embodiments provided in this application are implemented.

[0156] Further, as an executable solution, the above computing device may be a computer unit, and the computer unit may be a computing device such as a desktop computer, a notebook, a palm computer, and a cloud server. The computer unit may include, but is not limited to, a processor and a memory. Those skilled in the art can understand that the composition structure of the above computer unit is only an example of the computer unit and does not constitute a limitation on the computer unit. It may include more or fewer components than the above, or combine some components, or different components. For example, the computer unit may further include input / output devices, network access devices, a bus, etc., and the embodiments of the present application do not make any limitations thereto.

[0157] Further, as an executable solution, the so-called processor may be a Central Processing Unit (CPU), or may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field-Programmable Gate Arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The processor is the control center of the computer unit and connects various parts of the entire computer unit through various interfaces and lines.

[0158] The memory can be used to store the computer program and / or modules. By running or executing the computer program and / or modules stored in the memory, and invoking the data stored in the memory, the processor implements various functions of the computer unit. The memory mainly includes a program storage area and a data storage area. Among them, the program storage area can store an operating system and application programs required for at least one function; the data storage area can store data created according to the use of the mobile phone, etc. In addition, the memory can include high-speed random access memory, and can also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) card, a Flash Card, at least one magnetic disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0159] This application also provides a computer-readable storage medium storing a computer program, which when executed by a processor implements all or part of the steps of the above-mentioned tool shank structure optimization method in the embodiments of this application.

[0160] This application also provides a computer program product including computer programs / instructions, which when executed by a processor implement all or part of the steps of the above-mentioned tool shank structure optimization method in the embodiments of this application.

[0161] If the modules / units integrated in the above computing unit are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an understanding, to implement all or part of the processes in the above-mentioned method embodiments of this application, it can also be completed by instructing related hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of the above-mentioned method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in the form of source code, object code, an executable file, or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a mobile hard disk, a magnetic disk, an optical disc, a computer memory, a read-only memory (ROM), a random access memory (RAM), and a software distribution medium, etc. It should be noted that the content included in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction.

[0162] Although the present application has been specifically shown and described in connection with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present application without departing from the spirit and scope of the present application as defined by the appended claims, and all such changes are within the scope of protection of the present application.

Claims

1. A method for optimizing a tool bar structure, characterized in that: The method comprises: Obtain a three-dimensional structural model of the tool bar; Performing mechanical structure simulation on the three-dimensional structural model based on target working conditions to obtain mechanical response parameters of the tool bar, wherein the mechanical response parameters include deformation of the tool bar; Performing modal analysis on the three-dimensional structural model based on the target working condition to obtain modal parameters of the tool bar, wherein the modal parameters at least include a vibration frequency of the tool bar; Based on the mechanical response parameters and the modal parameters, the three-dimensional structural model is adjusted until it meets the optimization target to obtain an optimized three-dimensional structural model.

2. The tool bar structure optimization method according to claim 1, characterized in that: The three-dimensional structural model includes the sensor installation position in the tool bar; The mechanical structure simulation of the three-dimensional structure model based on the target working condition to obtain the mechanical response parameters of the tool bar includes: A load is applied to the three-dimensional structural model based on the target working condition to obtain the overall structural deformation of the tool bar and the deformation of the sensor installation position.

3. The method for optimizing the tool bar structure according to claim 1, characterized in that: The performing modal analysis on the three-dimensional structural model based on the target working condition to obtain the modal parameters of the tool bar includes: The material properties of the three-dimensional structural model are determined based on the target working conditions and constraints are imposed, and the natural frequencies of the tool bar under various vibration modes are obtained by solving the problem.

4. The method for optimizing the tool bar structure according to any one of claims 1 to 3, characterized in that: The step of adjusting the three-dimensional structural model based on the mechanical response parameters and the modal parameters until the optimization target is met to obtain an optimized three-dimensional structural model comprises: If the vibration frequency is within the given processing parameter range in the optimization target, adjusting the structural parameters and / or material matching parameters in the three-dimensional structural model until an optimized three-dimensional structural model is obtained in which the vibration frequency is not within the given processing parameter range; If the deformation condition does not meet the target deformation amount in the optimization target, the structural parameters and / or material matching parameters of the three-dimensional structural model are adjusted until an optimized three-dimensional structural model whose deformation condition meets the target deformation amount is obtained.

5. The method for optimizing the tool bar structure according to claim 4, characterized in that: In the case where the vibration frequency cannot avoid the given processing parameter range, the method further includes: A damping structure and / or vibration reduction material is added to the three-dimensional structural model.

6. The tool bar structure optimization method according to claim 1, characterized in that: The acquiring of the three-dimensional structural model of the tool bar includes: acquiring a plurality of candidate three-dimensional structural models of the tool bar, wherein the sensors in the plurality of candidate three-dimensional structural models are installed at different positions.

7. The method for optimizing the tool bar structure according to claim 6, characterized in that: The method further comprises: Selecting at least one test three-dimensional structure model from the optimized three-dimensional structure models corresponding to the plurality of candidate three-dimensional structure models for tool bar production testing; According to the frequency response function model of the test three-dimensional structural model under production test conditions, a target three-dimensional structural model whose structural strength and response frequency meet preset requirements is selected.

8. The method for optimizing the tool bar structure according to claim 1, characterized in that: The mechanical structure simulation and the modal analysis are implemented by one or more finite element simulation software.

9. A tool bar structure optimization device, characterized in that: The device comprises: A modeling module is used to: obtain a three-dimensional structural model of the tool bar; A structural simulation module, used to: perform mechanical structural simulation on the three-dimensional structural model based on target working conditions to obtain mechanical response parameters of the tool bar, wherein the mechanical response parameters include deformation of the tool bar; A modal analysis module, used to: perform modal analysis on the three-dimensional structural model based on the target working condition to obtain modal parameters of the tool bar, wherein the modal parameters at least include a vibration frequency of the tool bar; The optimization module is used to adjust the three-dimensional structural model based on the mechanical response parameters and the modal parameters until the optimization target is met to obtain an optimized three-dimensional structural model.

10. A computer-readable storage medium, characterized in that: At least one program is stored in the storage medium, and the at least one program is executed by the processor to implement the tool bar structure optimization method provided in any one of claims 1 to 8.

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