Helical fluted tap parameterization design method and system based on NX secondary development

Abstract

The invention belongs to the technical field of tool design, and provides a spiral fluted tap parameterization design method and system based on NX secondary development. According to the technical scheme, parameters of an initial model of a spiral fluted tap are determined according to working condition requirements; based on the parameters of the initial model, an expression of each parameter of the spiral fluted tap is established; determining a constraint relationship among the parameter expressions of the spiral fluted tap; based on the constraint relation between the parameter expressions, parametric modeling is conducted on the spiral fluted tap, and a spiral fluted tap parametric graph template is established; and based on the spiral fluted tap parameterization graph template, parameterization design is carried out, a parameterization design scheme is determined, and a model is output. The defects of long period, low efficiency, large workload and the like of the traditional spiral fluted tap design can be effectively overcome, the time of parameter design and modification of the spiral fluted tap is greatly shortened, the workload is greatly reduced, the efficiency is improved, and the cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of tool design, and in particular relates to a parametric design method and system for a spiral groove tap based on NX secondary development. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] The spiral groove tap is a common tool for processing internal threads. It gradually removes metal materials by rotating and moving forward to form a threaded hole. It is widely used in the field of mechanical engineering and has a very large demand. It occupies an important position in the market. The general process of spiral groove tap design is: material research and development, structural design, finished product manufacturing, performance testing, structural optimization, performance retesting, production and use. However, the traditional domestic spiral groove tap design usually relies on experience and has a series of shortcomings, such as long cycle, low efficiency, low design accuracy, waste of resources, and difficulty in meeting the requirements of modern cutting. The traditional spiral groove tap design method lacks digital and parametric design methods. Summary of the invention

[0004] In order to solve at least one technical problem existing in the above-mentioned background technology, the present invention provides a parametric design method and system for spiral groove taps based on NX secondary development, which can quickly establish multiple spiral groove tap models with different parameters through parametric design, thereby achieving the purpose of improving design efficiency. In addition, parametric design can also ensure that the generated model meets the requirements by constraining the parameter relationship of the spiral groove tap, which can greatly improve the design efficiency, reduce the design cycle, reduce costs, and fully improve the problems existing in traditional design.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] A first aspect of the present invention provides a parametric design method for a spiral groove tap based on NX secondary development, comprising the following steps:

[0007] Determine the parameters of the initial model of the spiral groove tap according to the working conditions;

[0008] Based on the parameters of the initial model, the expressions of various parameters of the spiral groove tap are established;

[0009] Determine the constraint relationship between various parameter expressions of spiral groove taps;

[0010] Based on the constraint relationship between various parameter expressions, the spiral groove tap is parametrically modeled and a parametric graphic template of the spiral groove tap is established.

[0011] Based on the parametric graphic template of the spiral groove tap, parametric design is carried out, the parametric design scheme is determined, and the model is output.

[0012] A second aspect of the present invention provides a parametric design system for spiral groove taps based on NX secondary development, comprising:

[0013] An initial model parameter determination module, which is used to determine the parameters of the initial model of the spiral groove tap according to working condition requirements;

[0014] A parameter expression building module, which is used to build expressions of various parameters of the spiral groove tap based on the parameters of the initial model;

[0015] A constraint relationship determination module, which is used to determine the constraint relationship between various parameter expressions of the spiral groove tap;

[0016] A parametric modeling module, which is used to perform parametric modeling on the spiral groove tap based on the constraint relationship between various parameter expressions and establish a parametric graphic template for the spiral groove tap;

[0017] The scheme generation module is used to perform parametric design based on the parametric graphic template of the spiral groove tap, determine the parametric design scheme, and output the model.

[0018] A third aspect of the present invention provides a computer-readable storage medium.

[0019] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps in the parametric design method for spiral groove taps based on NX secondary development as described above.

[0020] A fourth aspect of the present invention provides a computer device.

[0021] A computer device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps in the parametric design method for spiral groove taps based on NX secondary development as described above are implemented.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention is based on the secondary development technology of NX. Through parametric design of spiral groove taps, multiple spiral groove tap models with different parameters are quickly established. At the same time, by constraining the parameter relationship of the spiral groove taps, it is ensured that the generated model meets the requirements. It can effectively solve the shortcomings of the traditional spiral groove tap design method, such as long cycle, low efficiency, and large workload, and greatly shorten the time for parameter design and modification of spiral groove taps, greatly reduce the workload, improve design efficiency, and reduce design costs.

[0024] 2. Through the prevention of the present invention, the user only needs to input the tap parameters in the human-computer interaction dialog box to realize the automatic establishment of the tap model, and modifying the tap parameters can also realize the rapid update of the tap model.

[0025] Advantages of additional aspects of the present invention will be given in part in the following description, and in part will become obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0027] Figure 1 It is a schematic diagram of the arrangement process of the parametric design method of the spiral groove tap based on NX secondary development provided by an embodiment of the present invention;

[0028] Figure 2 is a diagram of the constraint relationship between the spiral groove tap expressions and the expressions provided by the embodiment of the present invention;

[0029] Figure 3 Schematic diagram of a spiral groove tap graphic template provided by an embodiment of the present invention;

[0030] Figure 4 The invention discloses a human-computer interaction dialog box interface of a parametric design system for spiral groove taps provided by an embodiment of the invention. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0032] It should be noted that the following detailed descriptions are all illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0033] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0034] Explanation of terms

[0035] Secondary development refers to further development or customization based on existing software, applications or platforms to meet specific needs or improve existing functions. Through secondary development, existing software can be expanded, customized, integrated or optimized to adapt to specific business processes and needs. This approach reduces the time and cost of development from scratch and takes advantage of the stability and maturity of existing software. NX (also known as Siemens NX) is a powerful integrated CAD / CAM / CAE software platform that can be widely used in product design, manufacturing and analysis. Secondary development based on NX refers to further customization and expansion of software functions based on NX software as a platform to meet specific user needs or work requirements. Through secondary development, NX can be systematically integrated with other software to achieve data sharing, and can also achieve complementary collaborative design. NX includes a wealth of secondary development tools, such as NX Open API, NX Open GRIP, NX Open UIStyler, NX Open MenuScript, etc. These tools can be used to easily develop customized functions, systems, plug-ins, etc. to meet the specific needs of users.

[0036] Embodiment 1

[0037] like Figure 1 As shown, this embodiment provides a parametric design method for spiral groove taps based on NX secondary development, including the following steps:

[0038] Step 1: Determine the parameters of the initial model of the spiral groove tap according to the working conditions;

[0039] Step 2: Based on the parameters of the initial model, establish expressions for various parameters of the spiral groove tap;

[0040] Step 3: Determine the constraint relationship between various parameter expressions of the spiral groove tap;

[0041] Step 4: Based on the constraint relationship between various parameter expressions, parametric modeling is performed on the spiral groove tap, and a parametric graphic template of the spiral groove tap is established;

[0042] Step 5: Perform parametric design based on the parametric graphic template of the spiral groove tap;

[0043] Step 6: Verify the parametric design results. If correct, proceed to the next step. If wrong, find the problems in the parametric modeling process and modify them.

[0044] Step 7: Determine the parametric design solution and output the model.

[0045] The scheme is described in detail below by way of specific embodiments.

[0046] As a specific embodiment, in step 1, the parameters of the initial model of the spiral groove tap are determined according to actual working condition requirements, wherein the actual working condition requirements include tap material, workpiece material, processing parameters, etc.;

[0047] Then the corresponding initial model parameters of the tap are determined. The main parameters to be determined include the tap's front angle, back angle, taper angle, helix angle, blade diameter, shank diameter, guide taper diameter, square head length, square head width and thread size.

[0048] After the parameters are determined, the initial structural framework of the spiral groove tap is formed, preparing for the subsequent expression establishment and parametric modeling.

[0049] Among them, in step 2, when establishing expressions of various parameters of the spiral groove tap based on the parameters of the initial model, this embodiment uses the expression module of NX software. According to the relevant requirements of NX secondary development, the expression is established in English to facilitate the subsequent background program writing.

[0050] Expressions are established corresponding to all parameters of the spiral groove tap, and the parameters include independent parameters and dependent parameters, wherein there is a constraint relationship between the dependent parameters and the independent parameters, and the values ​​of the dependent parameters are determined by the independent parameters.

[0051] The established expression is shown below in a specific embodiment, and the value of the expression is the value of the initial graphic template of the spiral groove tap, which is as follows:

[0052] Tap length: 80mm

[0053] Tap blade length: 24mm

[0054] Tap shank diameter: 8mm

[0055] Bladeback width: 4mm

[0056] Core diameterCorediameter: 4mm

[0057] Rake Angle: 10°

[0058] Reliefangle:3°

[0059] Tapangle: 15°

[0060] Lead:54.414mm

[0061] Pitch:1.5mm

[0062] Tooth height: 0.812mm

[0063] Slotheight:(5 / 8)H:0.5075mm

[0064] Slot width Caokuan: (7 / 8)*Pitch

[0065] Groove bottom width Caodikuan: (1 / 4)*Pitch

[0066] Tap head diameter: 10mm

[0067] Shank length: 56mm

[0068] Spiral groove transition arc radius: R1 = 5.5mm, R2 = 2.5mm

[0069] Tap diameter: 8.97mm

[0070] Grooved outer diameter: 10mm.

[0071] In step 3, it is necessary to determine the constraint relationship between the various parameter expressions of the spiral groove tap. After the expressions of all the parameters of the spiral groove tap are established in step 2, it is necessary to establish the constraint relationship between the expressions, including:

[0072] The parameters of spiral groove taps are divided into independent parameters and dependent parameters, and then the constraint relationship between the independent parameters and the dependent parameters is established. According to the general basic knowledge of taps, the constraint relationships that need to be established mainly include: the relationship between the core diameter and the blade diameter, the relationship between the blade back width and the blade diameter, the relationship between the guide cone diameter and the blade diameter, etc.

[0073] That is, use the "expression" command to establish corresponding constraints between the parameters associated with the geometric dimensions, so that they are associated. When the size of a certain expression parameter changes, the size of the expression parameter with which it has a constraint relationship will change accordingly. For example, when the value of an independent parameter changes, the value of the corresponding non-independent parameter with a constraint relationship will also change accordingly, thereby maintaining the rationality of the tap structure. The established expression and its constraint relationship are as follows: Figure 2 shown.

[0074] It should be noted that the independent parameters of this embodiment are parameters that drive the geometric structure change of the spiral groove tap model, which need to be input into the human-computer interaction dialog box. The non-independent parameters generally have a certain constraint relationship with the independent parameters and are usually determined by the value of the independent parameters. The independent parameters and the non-independent parameters together constitute the complete structure of the spiral groove tap.

[0075] Among them, in step 4, in this embodiment, based on the constraint relationship between various parameter expressions, the modeling module of NX software is used to parametrically model the spiral groove tap, complete the parameterization of the spiral groove tap model, and establish a parametric graphic template for the spiral groove tap.

[0076] It is necessary to use the NX modeling module based on the established expression and use the relevant commands of solid modeling to draw the three-dimensional model of the spiral groove tap graphic template. Each dimensional parameter of the spiral groove tap is associated with the previously established expression to obtain the model of the parametric graphic template and realize parametric modeling.

[0077] In the parametric modeling process, the size of each parameter of the tap is driven by a previously established expression rather than a specific value. After the expression is established, the constraint relationship between the expressions must be established. For example, A=2B, that is, the size of parameter A is fixed to twice that of parameter B. In this way, the established tap parametric model will contain the constraint relationship between many parameters. When the size of a certain expression is modified, the expression with a constraint relationship will automatically change accordingly. Such a model containing many expressions of modifiable parameters is a parametric model, and the process of establishing the model is parametric modeling.

[0078] Expression-based constraint relationships refer to the use of mathematical expressions to define the relationship between model parameters, thereby achieving automatic parameterization of the model. Parameters in NX can be the size, position, angle, etc. of the model. By defining the constraint relationships between these parameters and then building a model based on these constraint relationships, the shape and size of the model can be easily changed. When the value of a parameter changes, the other parameters associated with it will automatically update to maintain the consistency of the model. In this way, designers can quickly iterate and optimize the design and improve design efficiency.

[0079] Specifically include:

[0080] First, use the sketch to draw the spiral groove tap groove section, and then use the stretch, rotate, sweep and other commands to draw the 3D model of the tap graphic template. Each parameter of the 3D model is associated with the previously established expression, that is, the "expression-driven" method is used for 3D modeling, which is convenient for subsequent parameter modification and model update. After completing the establishment of the spiral groove tap parametric graphic template, save the template to the NX model library for subsequent calls. The schematic diagram of the established spiral groove tap graphic template is shown in the figure below. Figure 3 shown.

[0081] For example, the groove structure is drawn using the "offset method" in the "sketch" command. After drawing, the groove is swept along the spiral line to obtain a spiral groove. The square head width and length, shank length, etc. are designed according to national standards, and the thread adopts a coarse thread.

[0082] In step 5, based on the parametric graphic template of the spiral groove tap, the menu and dialog box of the parametric design system are designed and the background program is written by using NX and VS software to complete the parametric system design, including:

[0083] First, design the menu and human-computer interaction dialog box in the parameterized system, including:

[0084] (1) Establish the secondary development directory of NX;

[0085] (2) Write Menuscript, a special language for menu design in NX secondary development, and put it into the background;

[0086] (3) The Block UI Styler module in NX software is used to design the dialog interface of the parametric design system of spiral groove taps. The dialog editor in Block UI Styler is mainly used. In the editor, all independent parameters of the spiral groove tap need to be added to the dialog box, while non-independent parameters do not need to be added. The independent parameters of the spiral groove tap include the front angle, back angle, taper angle, helix angle, groove bottom arc radius R1, groove bottom arc radius R2, etc. At the same time, the structural reference diagram of the spiral groove tap is also added to the dialog box to facilitate users to fully understand the meaning of each parameter. Finally, "OK" and "Apply" buttons and options to determine the tap vector and position need to be added.

[0087] Then proceed to write NX Open C++ programs, start Visual Studio, create related projects for background program writing, then add the source files and header files generated by the previously designed dialog box to the project, and then start writing C++ programs; the main programs that need to be written involve: creating a coordinate system, importing tap templates, finding tap expressions, editing tap expressions, etc.

[0088] After the program is written, put the corresponding header files, source files and other series of files into the development directory to complete the writing of NX Open C++ program. Figure 4 shown.

[0089] In step 6, the parametric design results are verified. If they are correct, the next step is carried out. If they are wrong, the problems in the parametric modeling process are found and modified, including:

[0090] This step is the verification work, which requires inputting or modifying the parameters of the spiral groove tap in the human-computer interaction interface to drive the spiral groove tap to change. If the parameters of the spiral groove tap change correctly and no structural errors occur, the verification is correct. If parameter change errors or structural errors occur, it means that there are problems in the parametric modeling process, and it is necessary to return to step 4 to re-perform parametric modeling, adjust the model design, and then redesign. If the verification passes, proceed to step 7 to output the model.

[0091] The advantage of the above scheme is that by applying the secondary development method to the parametric design of spiral groove taps, the gap of lack of universalization, standardization, serialization and parameterization in the existing spiral groove tap design is filled, and the efficient design of spiral groove taps is achieved.

[0092] Embodiment 2

[0093] This embodiment provides a parametric design system for spiral groove taps based on NX secondary development, including:

[0094] An initial model parameter determination module, which is used to determine the parameters of the initial model of the spiral groove tap according to working condition requirements;

[0095] A parameter expression building module, which is used to build expressions of various parameters of the spiral groove tap based on the parameters of the initial model;

[0096] A constraint relationship determination module, which is used to determine the constraint relationship between various parameter expressions of the spiral groove tap;

[0097] A parametric modeling module, which is used to perform parametric modeling on the spiral groove tap based on the constraint relationship between various parameter expressions and establish a parametric graphic template for the spiral groove tap;

[0098] The scheme generation module is used to perform parametric design based on the parametric graphic template of the spiral groove tap, determine the parametric design scheme, and output the model.

[0099] Embodiment 3

[0100] This embodiment provides a computer-readable storage medium having a computer program stored thereon. When the program is executed by a processor, the steps in the parametric design method for spiral groove taps based on NX secondary development as described above are implemented.

[0101] Embodiment 4

[0102] This embodiment provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the steps in the parametric design method for spiral groove taps based on NX secondary development as described above are implemented.

[0103] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of hardware embodiments, software embodiments, or embodiments combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) containing computer-usable program code.

[0104] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0105] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0106] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0107] A person skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium, and when the program is executed, it can include the processes of the embodiments of the above-mentioned methods. The storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc.

[0108] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A parametric design method for spiral groove taps based on NX secondary development, characterized in that: The steps include: Determine the parameters of the initial model of the spiral groove tap according to the working conditions; Based on the parameters of the initial model, the expressions of various parameters of the spiral groove tap are established; Determine the constraint relationship between various parameter expressions of spiral groove taps; Based on the constraint relationship between various parameter expressions, the spiral groove tap is parametrically modeled and a parametric graphic template of the spiral groove tap is established. Based on the parametric graphic template of the spiral groove tap, parametric design is carried out, the parametric design scheme is determined, and the model is output.

2. A parametric design method for spiral groove taps based on NX secondary development as claimed in claim 1, characterized in that: The parameters include independent parameters and dependent parameters, wherein there is a constraint relationship between the dependent parameters and the independent parameters, and the values ​​of the dependent parameters are determined by the independent parameters.

3. The parametric design method of spiral groove taps based on NX secondary development as claimed in claim 1, characterized in that: The constraint relationships include the relationship between the core diameter and the blade diameter, the relationship between the blade back width and the blade diameter, and the relationship between the guide cone diameter and the blade diameter.

4. The parametric design method for spiral groove taps based on NX secondary development as claimed in claim 1, characterized in that: During the parametric modeling of the spiral groove tap, the established expression is used to drive the established expression. After the expression is established, the constraint relationship between the expressions is established. When the size of a certain expression is modified, the expression with the constraint relationship therewith is automatically changed accordingly.

5. The parametric design method of spiral groove tap based on NX secondary development as claimed in claim 1, characterized in that: When performing parametric design based on the parametric graphic template of the spiral groove tap, NX and VS software are used to cooperate with each other to design the menu and dialog box of the parametric design system and write the background program to complete the parametric system design.

6. The parametric design method for spiral groove taps based on NX secondary development as claimed in claim 1, characterized in that: The design of the menu and dialog box of the parameterized design system specifically includes: Establish the secondary development directory of NX; Write Menuscript, a special language for menu design in NX secondary development, and put it in the background; The Block UI Styler module in NX software is used to design the dialog interface of the spiral groove tap parametric design system. Use the dialog editor in Block UI Styler to add all the independent parameters of the spiral groove tap to the dialog box in the editor, while the non-independent parameters do not need to be added. At the same time, the structural reference diagram of the spiral groove tap is also added to the dialog box. Finally, interactive buttons and options for determining the tap vector and position need to be added.

7. The parametric design method for spiral groove taps based on NX secondary development as claimed in claim 1, characterized in that: After parametric design, the parametric design results are verified. If correct, proceed to the next step. If wrong, find the problems in the parametric modeling process and modify them.

8. A parametric design system for spiral groove taps based on NX secondary development, characterized in that: include: An initial model parameter determination module, which is used to determine the parameters of the initial model of the spiral groove tap according to working condition requirements; A parameter expression building module, which is used to build expressions of various parameters of the spiral groove tap based on the parameters of the initial model; A constraint relationship determination module, which is used to determine the constraint relationship between various parameter expressions of the spiral groove tap; A parametric modeling module, which is used to perform parametric modeling on the spiral groove tap based on the constraint relationship between various parameter expressions and establish a parametric graphic template for the spiral groove tap; The scheme generation module is used to perform parametric design based on the parametric graphic template of the spiral groove tap, determine the parametric design scheme, and output the model.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps in a parametric design method for spiral groove taps based on NX secondary development as described in any one of claims 1 to 7 are implemented.

10. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the steps in the parametric design method for spiral groove taps based on NX secondary development as described in any one of claims 1 to 7 are implemented.

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