Lifting mechanism design method and device, machining equipment and readable storage medium

Abstract

The invention relates to a lifting mechanism design method and device, machining equipment and a readable storage medium. The method comprises the steps that the adjustable extremely-low position and the load bearing value of a lifting mechanism are obtained; determining a finite element analysis model of the lifting mechanism according to the adjustable extremely low position and the load bearing value; and determining a design evaluation result of each part in the lifting mechanism according to the finite element analysis model. According to the method, the problem that various parts (such as a crank, a connecting rod and a connecting shaft) in a lifting mechanism formed only based on experience of designers cannot meet actual working conditions and load conditions in a complicated form can be effectively solved, the design efficiency of the lifting mechanism is ensured, the design reasonability of the lifting mechanism is improved, and the design cost is reduced. And the higher requirement of the design of the machine tool workbench is met.

Description

Technical Field

[0001] The present application relates to the field of machine tool worktable design, and in particular to a lifting mechanism design method, device, processing equipment and readable storage medium. Background Art

[0002] With the continuous development of machine tool worktable design technology and the continuous enrichment of machine tool use needs, the requirements for machine tool worktable design are getting higher and higher. In the process of machine tool worktable design, in order to meet the processing needs of machine tools at different heights, the machine tool worktable is usually a lifting worktable.

[0003] In the related technology, the commonly used lifting workbench is usually a lifting mechanism that converts the horizontal concentrated force of a single hydraulic cylinder into multiple evenly arranged vertical concentrated forces, thereby lifting the entire workbench. However, the lifting mechanism formed only based on the experience of designers has the problem that parts such as cranks, connecting rods and connecting shafts in the complex lifting mechanism cannot meet the actual working conditions and load conditions. Summary of the invention

[0004] Based on this, it is necessary to provide a lifting mechanism design method, device, processing equipment and readable storage medium to address the above technical problems.

[0005] A lifting mechanism design method, applied to a machine tool workbench, comprising:

[0006] Obtaining the adjustable extreme low position and load bearing value of the lifting mechanism;

[0007] Determining a finite element analysis model of the lifting mechanism according to the adjustable extreme low position and the load bearing value;

[0008] According to the finite element analysis model, the design evaluation results of each part in the lifting mechanism are determined.

[0009] In one embodiment, determining the finite element analysis model of the lifting mechanism according to the adjustable extreme low position and the load bearing value includes:

[0010] Determining a three-dimensional geometric model of the lifting mechanism according to the adjustable extreme low position;

[0011] According to the three-dimensional geometric model and the load bearing value, a finite element analysis is performed on the lifting mechanism to determine a finite element analysis model of the lifting mechanism.

[0012] In one embodiment, the lifting mechanism includes a crank and a connecting rod, and the lifting mechanism is connected to a driver and a machine tool worktable. The finite element analysis of the lifting mechanism is performed according to the three-dimensional geometric model and the load bearing value to determine the finite element analysis model of the lifting mechanism, including:

[0013] Obtaining the relative rotation relationship between the crank and the connecting rod, the first connection position between the lifting mechanism and the driver, the second connection position between the lifting mechanism and the machine tool worktable frame, and the third connection position between the lifting mechanism and the machine tool worktable load;

[0014] A finite element analysis model of the lifting mechanism is determined according to the relative rotation relationship, the first connection position, the second connection position, the third connection position, and the load bearing value.

[0015] In one embodiment, determining the finite element analysis model of the lifting mechanism according to the relative rotation relationship, the first connection position, the second connection position, the third connection position and the load bearing value includes:

[0016] Determining the rotary motion pair of the lifting mechanism according to the relative rotation relationship;

[0017] determining a restraining force of the lifting mechanism according to the first connection position and the second connection position;

[0018] Determining a simulated load value of the lifting mechanism according to the third connection position and the load bearing value;

[0019] A finite element analysis model of the lifting mechanism is determined according to the rotary kinematic pair, the constraint force and the simulated load value.

[0020] In one embodiment, determining the finite element analysis model of the lifting mechanism according to the rotary motion pair, the constraint force and the simulated load value includes:

[0021] Meshing the three-dimensional geometric model according to the rotational kinematic pair, the constraint force and the simulation load value, and determining the three-dimensional geometric model after meshing;

[0022] According to the three-dimensional geometric model after the grid division, a finite element analysis model of the lifting mechanism is determined.

[0023] In one embodiment, the performing finite element analysis on the lifting mechanism according to the three-dimensional geometric model and the load bearing value to determine the finite element analysis model of the lifting mechanism further includes:

[0024] Obtaining material properties and cross-sectional properties of the lifting mechanism;

[0025] According to the material properties, the cross-sectional properties and the load bearing value, a finite element analysis is performed on the lifting mechanism to determine a finite element analysis model of the lifting mechanism.

[0026] In one embodiment, determining the design evaluation results of each part in the lifting mechanism according to the finite element analysis model includes:

[0027] Determining simulation analysis results of various parts in the lifting mechanism according to the finite element analysis model;

[0028] According to the simulation analysis results, the design evaluation results of each part in the lifting mechanism are determined.

[0029] A lifting mechanism design device, applied to a machine tool workbench, comprising:

[0030] An acquisition module, used for acquiring an adjustable extreme low position and a load bearing value of the lifting mechanism;

[0031] An analysis model determination module, connected to the acquisition module, for determining a finite element analysis model of the lifting mechanism according to the adjustable extreme low position and the load bearing value;

[0032] The evaluation result determination module is connected to the analysis model determination module and is used to determine the design evaluation results of each part in the lifting mechanism according to the finite element analysis model.

[0033] A processing device includes a memory and a processor, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the processor executes the above method.

[0034] A computer-readable storage medium stores a computer program, which implements the above method when executed by a processor.

[0035] A computer program product, when the computer program product is run on a terminal device, enables the terminal device to execute any of the methods described above.

[0036] The beneficial effects of the embodiments provided in this application include:

[0037] The lifting mechanism design method, in the process of designing the lifting mechanism of the machine tool worktable, performs finite element analysis on the current lifting mechanism according to the adjustable extreme low position and load bearing value of the lifting mechanism, obtains a finite element analysis model that can reflect the mechanical properties of the lifting mechanism under the current working condition and load conditions, and obtains the mechanical property analysis results of each part (such as a crank, a connecting rod and a connecting shaft) in the lifting mechanism after analyzing and processing the obtained finite element analysis model, thereby determining the design evaluation results of the lifting mechanism under the current working condition and load conditions according to the mechanical property analysis results of each part, that is, the lifting mechanism under different working conditions and load conditions is performed with finite element analysis, and the design evaluation results of each part (such as a crank, a connecting rod and a connecting shaft) in the lifting mechanism are obtained, effectively improving the lifting mechanism formed only based on the experience of designers, and the problem that each part (such as a crank, a connecting rod and a connecting shaft) in the lifting mechanism with complex forms cannot meet the actual working condition and load conditions, while ensuring the design efficiency of the lifting mechanism, the design rationality of the lifting mechanism is also improved, thereby meeting the higher requirements of the machine tool worktable design. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 A schematic flow chart of a lifting mechanism design method in one embodiment;

[0040] Figure 2 It is a structural schematic diagram of a lifting mechanism in one embodiment;

[0041] Figure 3 is a specific flow chart of step 104 in one embodiment;

[0042] Figure 4 is a specific flow chart of step 104 in one embodiment;

[0043] Figure 5 This is a specific flow chart of step 106 in one embodiment;

[0044] Figure 6 A schematic diagram of the position state of a lifting mechanism in one embodiment;

[0045] Figure 7 It is a schematic structural diagram of a rotary motion pair in a lifting mechanism in one embodiment;

[0046] Figure 8It is a schematic structural diagram of a rotary motion pair in a lifting mechanism in one embodiment;

[0047] Fig. 9 A schematic diagram of the structure of the restraint effect in the lifting mechanism in one embodiment;

[0048] Fig.10 A schematic diagram of the structure of the load action in the lifting mechanism in one embodiment;

[0049] Fig.11 A schematic diagram of mesh division of a three-dimensional geometric model of a lifting mechanism in one embodiment;

[0050] Fig.12 Schematic diagram of stress clouds of various parts in a lifting mechanism in one embodiment;

[0051] Fig.13 It is a schematic diagram of the overall deformation cloud of the lifting mechanism in one embodiment;

[0052] Fig.14 It is a structural schematic block diagram of a lifting mechanism design device in one embodiment;

[0053] Fig.15 It is a schematic block diagram of the specific structure of the analysis model determination module 40 in one embodiment;

[0054] Fig.16 It is a schematic block diagram of the specific structure of the analysis model determination module 40 in one embodiment;

[0055] Fig.17 A schematic block diagram of the specific structure of the evaluation result determination module 60 in one embodiment

[0056] Fig.18 Schematic diagram of the structure of a processing device in one embodiment. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0058] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0059] Figure 1, which is a flow chart of a lifting mechanism design method in one embodiment.

[0060] In this embodiment, if Figure 1 As shown, the lifting mechanism design method is applied to a machine tool workbench, and the lifting mechanism design method includes steps 102 to 106; Figure 2 As shown, the lifting mechanism includes a crank, a connecting rod and a connecting shaft. The connecting rod is connected to the connecting shaft through the crank. One end of the lifting mechanism is connected to the driver, and the other end of the lifting mechanism is connected to the machine tool worktable.

[0061] Step 102, obtaining the adjustable extreme low position and load bearing value of the lifting mechanism.

[0062] The adjustable extreme low position may be the lowest limit position that the lifting mechanism can adjust. The load bearing value may be the total mass of the load on the machine tool table. Optionally, the adjustable extreme low position may be the state position when each part in the lifting mechanism is subjected to the maximum torque. The load bearing value may be twice the sum of the mass of the machine tool table and the mass of the workpiece on the machine tool table.

[0063] It should be noted that the relative positions and angles of the parts in the lifting mechanism, such as the connecting shaft, connecting rod, and crank, may be different due to the different positions of the lifting mechanism in the stroke, and the stress conditions are generally different. In order to determine the minimum thrust of the hydraulic cylinder, it is necessary to select the state position of the lifting mechanism when the force is maximum for analysis, such as the lowest adjustable limit position of the lifting mechanism; similarly, other position states within the lifting mechanism stroke can also be selected for analysis according to other design requirements, and the lifting mechanism in other states can be evaluated.

[0064] The situations for obtaining the adjustable extreme low position and load bearing value of the lifting mechanism include: analyzing the position state of the lifting mechanism, the mass of the machine tool worktable and the mass of the workpiece on the machine tool worktable through the working condition load analysis module to determine the adjustable extreme low position and load bearing value of the lifting mechanism.

[0065] Step 104, determining a finite element analysis model of the lifting mechanism according to the adjustable extreme low position and the load bearing value.

[0066] The finite element analysis model can be generated based on the adjustable extreme low position and load bearing value of the lifting mechanism, and can be a structural analysis model that reflects the mechanical properties of the lifting mechanism under current working conditions and load conditions.

[0067] The case of determining the finite element analysis model of the lifting mechanism according to the adjustable extreme low position and the load bearing value includes: determining the three-dimensional geometric model of the lifting mechanism according to the adjustable extreme low position; performing finite element analysis on the lifting mechanism according to the three-dimensional geometric model and the load bearing value to determine the finite element analysis model of the lifting mechanism. Optionally, the three-dimensional geometric model can be a three-dimensional structural model that can reflect the relative position relationship and angle between each component assembly and parts in the lifting mechanism.

[0068] Step 106, determining the design evaluation results of each component in the lifting mechanism according to the finite element analysis model.

[0069] The design evaluation result may be the mechanical performance evaluation result of each part in the lifting mechanism. The design evaluation result includes a requirement satisfaction result and a requirement failure result. The requirement satisfaction result may be that the mechanical performance of each part in the lifting mechanism meets the design and use requirements of the lifting mechanism. The requirement failure result may be that the mechanical performance of each part in the lifting mechanism fails to meet the design and use requirements of the lifting mechanism.

[0070] It should be noted that when the design evaluation result is that the requirements are met, there is no need to improve the structural design of the parts in the lifting mechanism. When the design evaluation result is that the requirements cannot be met, the parts in the lifting mechanism must be redesigned.

[0071] The situations in which the design evaluation results of each part in the lifting mechanism are determined based on the finite element analysis model include: after analyzing and processing the obtained finite element analysis model, the mechanical properties analysis results of each part in the lifting mechanism (such as cranks, connecting rods and connecting shafts) are obtained; based on the obtained mechanical properties analysis results, the design evaluation results of each part in the lifting mechanism are determined.

[0072] During the design of the lifting mechanism of the machine tool worktable, the position state of the lifting mechanism, the mass of the machine tool worktable and the mass of the workpiece on the machine tool worktable are analyzed through the working condition load analysis module to determine the adjustable extreme low position and load bearing value of the lifting mechanism; according to the adjustable extreme low position, the three-dimensional geometric model of the lifting mechanism is determined; according to the three-dimensional geometric model and the load bearing value, the lifting mechanism is subjected to finite element analysis to determine the finite element analysis model of the lifting mechanism; after analyzing and processing the obtained finite element analysis model, the mechanical properties analysis results of each part of the lifting mechanism (such as crank, connecting rod and connecting shaft) are obtained; according to the obtained mechanical properties analysis results, the design evaluation results of each part in the lifting mechanism are determined, and finally, according to the obtained design evaluation results, it is decided whether to redesign the structure of each part in the lifting mechanism.

[0073] The lifting mechanism design method provided in this embodiment is to perform finite element analysis on the current lifting mechanism according to the adjustable extreme low position and load bearing value of the lifting mechanism during the design process of the lifting mechanism of the machine tool worktable, and obtain a finite element analysis model that can reflect the mechanical properties of the lifting mechanism under the current working conditions and load conditions, and after analyzing and processing the obtained finite element analysis model, obtain the mechanical property analysis results of each part (such as a crank, a connecting rod and a connecting shaft) in the lifting mechanism, so as to determine the design evaluation results of the lifting mechanism under the current working conditions and load conditions according to the mechanical property analysis results of each part, that is, to perform finite element analysis on the lifting mechanism under different working conditions and load conditions, and obtain the design evaluation results of each part (such as a crank, a connecting rod and a connecting shaft) in the lifting mechanism, effectively improve the lifting mechanism formed only based on the experience of the designers, and the problem that each part (such as a crank, a connecting rod and a connecting shaft) in the complex lifting mechanism cannot meet the actual working conditions and load conditions, while ensuring the design efficiency of the lifting mechanism, it also improves the design rationality of the lifting mechanism, thereby meeting the higher requirements of the machine tool worktable design.

[0074] Figure 3 , which is a specific flow chart of step 104 in an embodiment.

[0075] In this embodiment, if Figure 3 As shown, step 104 includes sub-steps 302 to 304 .

[0076] In sub-step 302, the relative rotation relationship between the crank and the connecting rod, the first connection position between the lifting mechanism and the driver, the second connection position between the lifting mechanism and the machine tool worktable frame, and the third connection position between the lifting mechanism and the machine tool worktable load are obtained.

[0077] The relative rotation relationship may be a relative rotation relationship between a crank and a connecting rod in the lifting mechanism. The first connection position may be a position corresponding to a connection between the lifting mechanism and the driver. The second connection position may be a position corresponding to a connection between the lifting mechanism and a machine tool worktable frame. The third connection position may be a position corresponding to a connection between the lifting mechanism and a machine tool worktable load.

[0078] In sub-step 304, a finite element analysis model of the lifting mechanism is determined according to the relative rotation relationship, the first connection position, the second connection position, the third connection position and the load bearing value.

[0079] The situations in which the finite element analysis model of the lifting mechanism is determined according to the relative rotation relationship, the first connection position, the second connection position, the third connection position and the load bearing value include: determining the rotational kinematic pair of the lifting mechanism according to the relative rotational relationship; determining the constraint force of the lifting mechanism according to the first connection position and the second connection position; determining the simulated load value of the lifting mechanism according to the third connection position and the load bearing value; determining the finite element analysis model of the lifting mechanism according to the rotational kinematic pair, the constraint force and the simulated load value.

[0080] The constraint force can be the reaction force after the fixed constraint is established at the connection between the lifting mechanism and the driver, or the force after the fixed constraint is established at the connection between the lifting mechanism and the workbench frame. The simulated load value can be the simulated load magnitude applied at the connection between the lifting mechanism and the workbench load based on the load bearing value.

[0081] Optionally, the specific circumstances of determining the finite element analysis model of the lifting mechanism according to the rotational kinematic pairs, constraint forces and simulation load values ​​include: meshing the three-dimensional geometric model according to the rotational kinematic pairs, constraint forces and simulation load values, and determining the three-dimensional geometric model after meshing; determining the finite element analysis model of the lifting mechanism according to the three-dimensional geometric model after meshing.

[0082] The lifting mechanism design method provided in this embodiment determines the rotational motion pairs, constraint forces and simulation load values ​​on the three-dimensional geometric model of the lifting mechanism through the structural correlation relationships such as the relative positions and angles of each part in the lifting mechanism, and meshes the three-dimensional geometric model to obtain a finite element analysis model of the lifting mechanism. While realizing the structural simulation processing of the lifting mechanism, the feasibility of the simulation processing of the lifting mechanism is guaranteed, thereby improving the feasibility of the lifting mechanism design method.

[0083] Figure 4 , which is a specific flow chart of step 104 in an embodiment.

[0084] In this embodiment, if Figure 4 As shown, step 104 also includes sub-steps 402 to 404 .

[0085] In sub-step 402, the material properties and cross-sectional properties of the lifting mechanism are obtained.

[0086] The material properties may be mechanical properties of the constituent materials of the lifting mechanism. The cross-sectional properties may be cross-sectional properties of an isotropic solid of the material properties of the lifting mechanism, ie the physical and mechanical properties of the material are the same in all directions.

[0087] In sub-step 404, a finite element analysis is performed on the lifting mechanism according to the material properties, the cross-sectional properties and the load bearing value to determine a finite element analysis model of the lifting mechanism.

[0088] The lifting mechanism is subjected to finite element analysis according to material properties, section properties and load bearing values, and the situations in which the finite element analysis model of the lifting mechanism is determined include: applying material properties and section properties to the three-dimensional geometric model of the lifting mechanism according to the material properties and section properties of the lifting mechanism, and applying load conditions to the three-dimensional geometric model of the lifting mechanism according to the load bearing value of the lifting mechanism, and then determining the finite element analysis model of the lifting mechanism in conjunction with subsequent simulation analysis processing.

[0089] The lifting mechanism design method provided in this embodiment applies material properties, cross-sectional properties and load conditions to the three-dimensional geometric model of the lifting mechanism through the material properties, cross-sectional properties and load bearing values ​​in the lifting mechanism, and cooperates with subsequent simulation analysis to obtain a finite element analysis model of the lifting mechanism. While realizing the structural simulation processing of the lifting mechanism, the feasibility of the simulation processing of the lifting mechanism is guaranteed, thereby improving the feasibility of the lifting mechanism design method.

[0090] Figure 5 , which is a specific flow chart of step 106 in one embodiment.

[0091] In this embodiment, if Figure 5 As shown, step 106 includes sub-steps 502 to 504 .

[0092] In sub-step 502, the simulation analysis results of each component in the lifting mechanism are determined according to the finite element analysis model.

[0093] The simulation analysis result can be the mechanical performance analysis result of each part in the lifting mechanism. Optionally, the simulation analysis result can be the simulation calculation result of the constraint force of the lifting mechanism, or the stress cloud map and maximum stress value of each part in the lifting mechanism, or the overall deformation cloud map of the lifting mechanism.

[0094] In sub-step 504, the design evaluation results of each component in the lifting mechanism are determined according to the simulation analysis results.

[0095] According to the simulation analysis results, the design evaluation results of each part in the lifting mechanism are determined in the following situations: according to the simulation calculation results of the constraint force of the lifting mechanism, the minimum thrust required by the driver under the current working conditions and load conditions is determined; and according to the stress cloud map and maximum stress value of each part in the lifting mechanism, the required strength allowable value of the connecting shaft in the lifting mechanism is determined; and according to the overall deformation cloud map of the lifting mechanism, the required deformation allowable value of the lifting mechanism is determined.

[0096] For example, analyze the working conditions and load of the lifting mechanism: the total mass of the workbench load is 2 tons; Figure 6 As shown in the figure, the lifting mechanism has two extreme positions, the lowest and the highest. In this design, when the lifting mechanism is at the lowest position, the crank and other parts bear the maximum torque, which is the adjustable extreme low position of the lifting mechanism. Of course, any position within the lifting mechanism stroke can also be selected for analysis according to actual needs.

[0097] Based on the finite element analysis software or program, a finite element analysis model of the lifting mechanism is established and solved: based on the adjustable extreme low position and load bearing value of the lifting mechanism, a three-dimensional geometric model of the lifting mechanism is established in the three-dimensional software, and the obtained three-dimensional geometric model is exported into a three-dimensional graphic file format, and then imported into the finite element simulation software; according to the material properties, cross-sectional properties and load bearing value of the lifting mechanism, a finite element analysis of the lifting mechanism is performed: the material properties of the steel are defined as follows: density 7850, elastic modulus 200GPa, Poisson's ratio 0.28, and the cross-sectional properties of various isotropic entities containing the above material properties are created, and the cross-sectional properties are assigned to all imported parts.

[0098] According to the relative rotation relationship, the first connection position, the second connection position, the third connection position and the load bearing value, the finite element analysis model of the lifting mechanism is determined: Figures 7 and 8 As shown, in the current design of the lifting mechanism, there are multiple rotational kinematic pairs, thereby defining the rotational pair relationship between the corresponding parts in the three-dimensional geometric model; Fig. 9 As shown in the figure, a fixed constraint is established at the connection between the lifting mechanism and the hydraulic cylinder, and the output option of the reaction force at the fixed constraint is defined. A fixed constraint is also established at the connection between the lifting mechanism and the main frame of the workbench. The X-axis, Y-axis and Z-axis in the figure represent the direction of the force. Fig.10 As shown in the figure, a concentrated force with a total size of 19800N and a vertical downward direction is applied at each connection between the lifting mechanism and the workbench load. Fig.11 As shown, the three-dimensional geometric model is meshed.

[0099] According to the finite element analysis model, the simulation analysis results of each part in the lifting mechanism are determined, and then according to the simulation analysis results, the design evaluation results of each part in the lifting mechanism are determined: the three-dimensional geometric model after meshing is simulated and analyzed, and the simulation results are post-processed to obtain the magnitude of the constraint force of the lifting mechanism, which is 110642.5N, that is, the minimum thrust required by the driver (such as a hydraulic cylinder) under the current working condition and load conditions is 110642.5N. The maximum pressure of the pre-selected driver (such as a hydraulic cylinder) in the current lifting mechanism is 14MPa, the piston rod diameter is 0.1m, and the maximum thrust is: 14MPa*(0.05*0.05*pi)=109955.741N, about 110,000N. The thrust of the pre-selected driver (such as a hydraulic cylinder) is too small, and a driver with a larger thrust (such as a hydraulic cylinder) needs to be selected; in addition, the simulation results are post-processed to obtain the stress cloud diagram of each part in the lifting mechanism as shown below Fig.12 As shown in the figure, the maximum stress value appears at the thinner diameter of one of the shafts. The allowable strength value of the connecting shaft in the lifting mechanism is 390.5MPa, which exceeds the material yield limit of 355MPa. The connecting shaft does not meet the strength requirements. The simulation results are then post-processed to obtain the overall deformation cloud diagram of the lifting mechanism as shown in the figure. Fig.13 As shown, the allowable deformation value of the lifting mechanism is 7.827 mm. If it occurs at the connection between the lifting mechanism and the load, the deformation of the lifting mechanism is too large and does not meet the design requirements.

[0100] The above results are the design evaluation results of each part in the current lifting mechanism. The design evaluation results include three important indicators: ① Under the current working conditions, the minimum thrust of the driver (such as the hydraulic cylinder) must be at least 110642.5N to push the load; ② The stress of the connecting shaft is too large, and the connecting shaft structure needs to be strengthened; ③ The maximum deformation of the overall structure is too large, and the connecting shaft structure needs to be improved.

[0101] The improvement of the connecting shaft structure can be to increase the diameter of the connecting shaft, and re-model and analyze it according to the above method to obtain the design evaluation results of each part in the improved lifting mechanism: ① Under the current working conditions, the minimum thrust of the driver (such as the hydraulic cylinder) is at least 110593.2N to push the load; ② The maximum stress of the connecting shaft is reduced to 159.9MPa, and the strength of the connecting shaft structure meets the design requirements; ③ The maximum deformation of the overall structure is reduced to 2.263mm, which meets the overall deformation requirements of the lifting mechanism.

[0102] It should be understood that, although the various steps in the above flowchart are displayed in sequence according to the prompts of the arrows, these steps are not necessarily executed in sequence in the order of the arrow prompts. Unless clearly stated in this article, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a part of the above sub-steps may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the sub-steps or stages of other steps. It should be noted that the above different embodiments can be combined with each other.

[0103] Fig.14 , which is a schematic structural block diagram of a lifting mechanism design device in an embodiment.

[0104] In this embodiment, if Fig.14 As shown, the lifting mechanism design device includes an acquisition module 20, an analysis model determination module 40 and an evaluation result determination module 60.

[0105] The acquisition module 20 is used to acquire the adjustable extreme low position and load bearing value of the lifting mechanism.

[0106] The analysis model determination module 40 is connected to the acquisition module 20 and is used to determine the finite element analysis model of the lifting mechanism according to the adjustable extreme low position and the load bearing value.

[0107] The evaluation result determination module 60 is connected to the analysis model determination module 40 and is used to determine the design evaluation results of each part in the lifting mechanism according to the finite element analysis model.

[0108] In this embodiment, each module is used to execute Figure 1 For details of the steps in the corresponding embodiments, please refer to Figure 1 as well as Figure 1 The relevant descriptions in the corresponding embodiments are not repeated here.

[0109] Specifically, in the process of parts arrangement planning, the position state of the lifting mechanism, the mass of the machine tool worktable and the mass of the workpiece on the machine tool worktable are analyzed through the working condition load analysis module to determine the adjustable extreme low position and load bearing value of the lifting mechanism; according to the adjustable extreme low position, the three-dimensional geometric model of the lifting mechanism is determined; according to the three-dimensional geometric model and the load bearing value, the lifting mechanism is subjected to finite element analysis to determine the finite element analysis model of the lifting mechanism; after analyzing and processing the obtained finite element analysis model, the mechanical properties analysis results of each part in the lifting mechanism (such as crank, connecting rod and connecting shaft) are obtained; according to the obtained mechanical properties analysis results, the design evaluation results of each part in the lifting mechanism are determined, and finally, according to the obtained design evaluation results, it is decided whether to re-design the structure of each part in the lifting mechanism.

[0110] The lifting mechanism design device provided in this embodiment performs finite element analysis on the current lifting mechanism according to the adjustable extreme low position and load bearing value of the lifting mechanism during the design process of the lifting mechanism of the machine tool worktable, and obtains a finite element analysis model that can reflect the mechanical properties of the lifting mechanism under the current working conditions and load conditions. After analyzing and processing the obtained finite element analysis model, the mechanical property analysis results of each part (such as a crank, a connecting rod and a connecting shaft) in the lifting mechanism are obtained, so that the design evaluation results of the lifting mechanism under the current working conditions and load conditions are determined according to the mechanical property analysis results of each part, that is, the finite element analysis of the lifting mechanism under different working conditions and load conditions is performed to obtain the design evaluation results of each part (such as a crank, a connecting rod and a connecting shaft) in the lifting mechanism, which effectively improves the lifting mechanism formed only based on the experience of the designers, and the problem that each part (such as a crank, a connecting rod and a connecting shaft) in the complex lifting mechanism cannot meet the actual working conditions and load conditions. While ensuring the design efficiency of the lifting mechanism, the design rationality of the lifting mechanism is also improved, thereby meeting the higher requirements of the machine tool worktable design.

[0111] Fig.15 , which is a schematic block diagram of the specific structure of the analysis model determination module 40 in an embodiment.

[0112] In this embodiment, if Fig.15 As shown, the analysis model determination module 40 includes a position relationship acquisition unit 420 and an analysis model determination unit 440 .

[0113] The position relationship acquisition unit 420 is used to obtain the relative rotation relationship between the crank and the connecting rod, the first connection position between the lifting mechanism and the driver, the second connection position between the lifting mechanism and the machine tool worktable frame, and the third connection position between the lifting mechanism and the machine tool worktable load.

[0114] The analysis model determination unit 440 is connected to the position relationship acquisition unit 420, and is used to determine the finite element analysis model of the lifting mechanism according to the relative rotation relationship, the first connection position, the second connection position, the third connection position and the load bearing value.

[0115] In this embodiment, each unit is used to execute Figure 3 For details of the steps in the corresponding embodiments, please refer to Figure 3 as well as Figure 3 The relevant descriptions in the corresponding embodiments are not repeated here.

[0116] Fig.16 , which is a schematic block diagram of the specific structure of the analysis model determination module 40 in an embodiment.

[0117] In this embodiment, if Fig.16 As shown, the analysis model determination module 40 includes an analysis model determination unit 440 and an attribute acquisition unit 430 .

[0118] The property acquisition unit 430 is used to acquire the material properties and cross-sectional properties of the lifting mechanism.

[0119] The analysis model determination unit 440 is connected to the property acquisition unit 430, and is used to perform finite element analysis on the lifting mechanism according to material properties, cross-section properties and load bearing values, and determine the finite element analysis model of the lifting mechanism.

[0120] In this embodiment, each unit is used to execute Figure 4 For details of the steps in the corresponding embodiments, please refer to Figure 4 as well as Figure 4 The relevant descriptions in the corresponding embodiments are not repeated here.

[0121] Fig.17 , which is a schematic block diagram of the specific structure of the evaluation result determination module 60 in an embodiment.

[0122] In this embodiment, if Fig.17 As shown, the evaluation result determination module 60 includes a simulation analysis unit 620 and an evaluation result determination unit 640 .

[0123] The simulation analysis unit 620 is used to determine the simulation analysis results of each part in the lifting mechanism according to the finite element analysis model.

[0124] The evaluation result determination unit 640 is connected to the simulation result determination unit 620 and is used to determine the design evaluation results of each part in the lifting mechanism according to the simulation analysis results.

[0125] In this embodiment, each unit is used to execute Figure 5 For details of the steps in the corresponding embodiments, please refer to Figure 5as well as Figure 5 The relevant descriptions in the corresponding embodiments are not repeated here.

[0126] The division of the various modules in the above-mentioned lifting mechanism design device is only for illustration. In other embodiments, the lifting mechanism design device can be divided into different modules as needed to complete all or part of the functions of the above-mentioned lifting mechanism design device.

[0127] For the specific definition of the lifting mechanism design device, please refer to the definition of the lifting mechanism design method above, which will not be repeated here. Each module in the above-mentioned lifting mechanism design device can be implemented in whole or in part by software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the processing equipment in the form of hardware, or can be stored in the memory of the processing equipment in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0128] Fig.18 , is a schematic diagram of the structure of a processing device in an embodiment.

[0129] In this embodiment, if Fig.18 As shown, the processing equipment includes a memory A1 and a processor A2; it may also include a display screen A3, a communications interface (Communications Interface) and a bus. Optionally, the processing equipment may be a lifting mechanism design equipment.

[0130] Among them, the memory A1, the processor A2, the display screen A3 and the communication interface can communicate with each other through a bus; the display screen A3 is set to display the user operation interface preset in the initial setting mode, and the display screen A3 can also display the process control window; the communication interface can transmit information; the memory A1 stores a computer program, and the processor A2 can call the logical instructions in the memory A1 to execute the method in the above embodiment.

[0131] In addition, the logic instructions in the above-mentioned memory A1 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent part.

[0132] The memory A1 is a computer-readable storage medium that can be configured to store software programs, computer executable programs, such as program instructions or modules corresponding to the methods in the embodiments of the present application. The processor A2 executes functional applications and data processing by running the software programs, instructions or modules stored in the memory A1, that is, implementing the methods in the above embodiments.

[0133] The memory A1 includes a program storage area and a data storage area, wherein the program storage area can store an operating system and an application required for at least one function; the data storage area can store data created according to the use of the terminal device, etc. In addition, the memory A1 can include a high-speed random access memory and a non-volatile memory.

[0134] Processor A2 can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0135] The present application also provides a computer-readable storage medium, one or more non-volatile computer-readable storage media containing computer-executable instructions, which, when executed by one or more processors, enable the processors to execute the method in the above embodiment.

[0136] The embodiment of the present application also provides a computer program product. When the computer program product is run on a terminal device, the terminal device executes the method in the above embodiment.

[0137] The lifting mechanism design method, device, processing equipment and readable storage medium provided in the above embodiments, in the process of designing the lifting mechanism of the machine tool worktable, finite element analysis is performed on the current lifting mechanism according to the adjustable extreme low position and load bearing value of the lifting mechanism, and a finite element analysis model that can reflect the mechanical properties of the lifting mechanism under the current working condition and load conditions is obtained, and after analyzing and processing the obtained finite element analysis model, the mechanical property analysis results of each part (such as the crank, connecting rod and connecting shaft) in the lifting mechanism are obtained, so as to determine the mechanical properties of the lifting mechanism under the current working condition and load conditions according to the mechanical property analysis results of each part. The design evaluation results of the lifting mechanism under different working conditions and load conditions are obtained by performing finite element analysis on the lifting mechanism under different working conditions and load conditions, and the design evaluation results of each part in the lifting mechanism (such as cranks, connecting rods and connecting shafts) are obtained. The lifting mechanism formed only based on the experience of designers is effectively improved, and the various parts (such as cranks, connecting rods and connecting shafts) in the lifting mechanism with complex forms cannot meet the actual working conditions and load conditions. While ensuring the design efficiency of the lifting mechanism, the design rationality of the lifting mechanism is also improved, thereby meeting the higher requirements of the machine tool worktable design, which has important economic value and promotion and practical value.

[0138] Any reference to memory, storage, database or other medium used in this application may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM), which is used as an external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0139] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0140] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A lifting mechanism design method, applied to a machine tool workbench, characterized in that: include: Obtaining the adjustable extreme low position and load bearing value of the lifting mechanism; Determining a finite element analysis model of the lifting mechanism according to the adjustable extreme low position and the load bearing value; According to the finite element analysis model, the design evaluation results of each part in the lifting mechanism are determined.

2. The lifting mechanism design method according to claim 1, characterized in that: Determining the finite element analysis model of the lifting mechanism according to the adjustable extreme low position and the load bearing value includes: Determining a three-dimensional geometric model of the lifting mechanism according to the adjustable extreme low position; According to the three-dimensional geometric model and the load bearing value, a finite element analysis is performed on the lifting mechanism to determine a finite element analysis model of the lifting mechanism.

3. The lifting mechanism design method according to claim 2, characterized in that: The lifting mechanism includes a crank and a connecting rod, and the lifting mechanism is connected to a driver and a machine tool worktable. According to the three-dimensional geometric model and the load bearing value, a finite element analysis is performed on the lifting mechanism to determine a finite element analysis model of the lifting mechanism, including: Obtaining the relative rotation relationship between the crank and the connecting rod, the first connection position between the lifting mechanism and the driver, the second connection position between the lifting mechanism and the machine tool worktable frame, and the third connection position between the lifting mechanism and the machine tool worktable load; A finite element analysis model of the lifting mechanism is determined according to the relative rotation relationship, the first connection position, the second connection position, the third connection position, and the load bearing value.

4. The lifting mechanism design method according to claim 3, characterized in that: Determining the finite element analysis model of the lifting mechanism according to the relative rotation relationship, the first connection position, the second connection position, the third connection position and the load bearing value includes: Determining the rotary motion pair of the lifting mechanism according to the relative rotation relationship; determining a restraining force of the lifting mechanism according to the first connection position and the second connection position; Determining a simulated load value of the lifting mechanism according to the third connection position and the load bearing value; A finite element analysis model of the lifting mechanism is determined according to the rotary kinematic pair, the constraint force and the simulated load value.

5. The lifting mechanism design method according to claim 4, characterized in that: Determining the finite element analysis model of the lifting mechanism according to the rotary motion pair, the constraint force and the simulated load value includes: Meshing the three-dimensional geometric model according to the rotational kinematic pair, the constraint force and the simulation load value, and determining the three-dimensional geometric model after meshing; According to the three-dimensional geometric model after the grid division, a finite element analysis model of the lifting mechanism is determined.

6. The lifting mechanism design method according to claim 2, characterized in that: The step of performing finite element analysis on the lifting mechanism according to the three-dimensional geometric model and the load bearing value to determine the finite element analysis model of the lifting mechanism further includes: Obtaining material properties and cross-sectional properties of the lifting mechanism; According to the material properties, the cross-sectional properties and the load bearing value, a finite element analysis is performed on the lifting mechanism to determine a finite element analysis model of the lifting mechanism.

7. The lifting mechanism design method according to claim 1, characterized in that: Determining the design evaluation results of each part in the lifting mechanism according to the finite element analysis model includes: Determining simulation analysis results of various parts in the lifting mechanism according to the finite element analysis model; According to the simulation analysis results, the design evaluation results of each part in the lifting mechanism are determined.

8. A lifting mechanism design device, applied to a machine tool workbench, characterized in that: include: An acquisition module, used for acquiring an adjustable extreme low position and a load bearing value of the lifting mechanism; An analysis model determination module, connected to the acquisition module, for determining a finite element analysis model of the lifting mechanism according to the adjustable extreme low position and the load bearing value; The evaluation result determination module is connected to the analysis model determination module and is used to determine the design evaluation results of each part in the lifting mechanism according to the finite element analysis model.

9. A processing equipment, characterized in that: The method comprises a memory and a processor, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the processor executes the method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

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