A modular design method for tooling based on UG

Abstract

The present invention provides a modular tooling design method based on UG. First, three-dimensional models of standard parts and tooling for parts in aircraft engines are collected to construct a tooling design resource library. The tooling design resource library is then called using the three-dimensional modeling software UG. An appropriate template is selected based on the design parameters of the tooling to be processed and the parameters are adjusted. Finally, interrelated expressions of various dimensions are constructed in the two-dimensional template. By setting parameters, all dimensions in the two-dimensional diagram are automatically converted. The present invention performs secondary development of tooling drawing software on the UG platform to generate standardized drawing modules. By combining and setting the main parameters of these modules, a tooling model for a specific type of part is quickly established, parameterizing the tooling design and achieving modular tooling design.

Description

Technical Field

[0001] The present invention belongs to the technical field of tooling fixture design, and in particular relates to a tooling modular design method based on UG. Background Art

[0002] Modern aero-engine parts are diverse and complex, yet a significant number share similar structures and machining processes. Consequently, tooling design involves significant repetitive work and limited differentiation, hindering efficiency. To improve efficiency and reduce costs, there is a need for parameterized tooling design.

[0003] In addition to providing a command line and menu interface, UG also offers a functional method for controlling images and data—expressions. Using expressions to define model feature data, the 3D model parameters of different tooling can be derived through simple conversion based on the same set of parameters. This provides a way to use expressions to link data between tooling models, allowing the 3D model of the entire tooling set to be derived by modifying a single set of parameters. Summary of the Invention

[0004] In view of the above problems, the present invention provides a tooling modular design method based on UG, comprising:

[0005] Step 1: Collect 3D models of standard parts and tooling for aircraft engines and build a tooling design resource library; the tooling design resource library includes a tooling design standard parts library and a tooling design template library;

[0006] The tooling design standard parts library is used to classify and store three-dimensional models of standard parts;

[0007] The tooling design template library is used to classify and store three-dimensional models of various parts tooling structure templates;

[0008] The standard parts stored in the tooling design standard parts library are classified into general parts, fixtures, molds, measuring tools and cutting tools. The standard parts in each category are further subdivided according to national standards, departmental standards, enterprise standards and other classification standards.

[0009] The templates stored in the tooling design template library are classified according to fixtures, molds, measuring tools and cutting tools;

[0010] The specific construction process of the tooling design resource library is as follows:

[0011] Step 1.1: Classify parts according to the parts product tree, for example, structural parts, plate parts, sheet metal welding parts;

[0012] Step 1.2: Classify the corresponding tooling structures according to different part structures, and divide them into different modules according to the structure. By solidifying and optimizing the modular components of the tooling, different tooling component modules are formed, and a parametric tooling design resource library is established.

[0013] Step 2: Use the 3D modeling software UG to call the tooling design resource library; the specific calling process is as follows:

[0014] Step 2.1: Select the corresponding category according to product classification;

[0015] Step 2.2: According to the required tooling structure and functional requirements, select appropriate tooling structure modules from the resource library and conduct modular design by combining tooling component modules;

[0016] Step 3: Select the appropriate template and adjust the parameters according to the design parameters of the tooling to be processed; the specific expression is:

[0017] Step 3.1: Adjust the parameters of the selected module to meet the design requirements of the new tooling. By adjusting the variable values, call the relevant parameters, for example, Figure 3 The module structure contains variable values ​​a and b. When the variable value a is called, the number of bolts and nuts in the outermost circle is 8. When the variable value b is called, the number of bolts and nuts in the outermost circle is 6. There must be a parameter diagram on the calling interface;

[0018] Step 3.2: Then set the defined main parameters and related auxiliary parameters;

[0019] Step 4: Generate a 2D drawing of the template. First, create a 2D drawing template and construct the interrelationship expressions of the various dimensions in the drawing. By setting the parameters in step 3, all dimensions in the 2D drawing are automatically converted. Dimension annotation association is achieved, and local changes can be made to the 2D drawing.

[0020] The beneficial effects of the present invention are:

[0021] The present invention proposes a modular design method for tooling based on UG, which changes the traditional purely manual single-piece design mode, freeing technicians from heavy physical labor, thereby significantly improving production efficiency, part quality and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the tooling modular design method based on UG in the present invention;

[0023] Figure 2 A tooling design resource library built for this invention;

[0024] Figure 3 This is a modular design diagram of the disc-type parts fixture of the present invention;

[0025] Figure 4 Input diagram of modular structural parameters of disk parts in the present invention;

[0026] Figure 5 A sample of a two-dimensional engineering drawing generated by the method of the present invention;

[0027] Figure 5 Among them, 1-bushing; 2-locating ring; 3-hook bolt; 4-sleeve; 5-nut; 6-hexagonal head bolt; 7-hexagonal head tightening screw; 8-first cylindrical pin; 9-second cylindrical pin. DETAILED DESCRIPTION

[0028] The invention is further described below with reference to the accompanying drawings and specific implementation examples. To improve tooling design efficiency, achieve universal tooling for similar parts, achieve unified design, and improve the stability and reliability of part quality, the present invention conducts secondary development of tooling drawing software on the UG platform to generate standardized drawing modules. By combining and setting the main parameters of these modules, tooling models for a certain type of part are quickly established, making the tooling design parameterized and achieving modular design of the tooling.

[0029] Step 1: Collect 3D models of standard parts and tooling for aircraft engines and build a tooling design resource library; the tooling design resource library includes a tooling design standard parts library and a tooling design template library;

[0030] The tooling design standard parts library is used to classify and store three-dimensional models of standard parts;

[0031] The tooling design template library is used to classify and store three-dimensional models of various parts tooling structure templates;

[0032] The standard parts stored in the tooling design standard parts library are classified into general parts, fixtures, molds, measuring tools and cutting tools. The standard parts in each category are further subdivided according to national standards, departmental standards, enterprise standards and other classification standards.

[0033] The templates stored in the tooling design template library are classified according to fixtures, molds, measuring tools and cutting tools;

[0034] The specific construction process of the tooling design resource library is as follows:

[0035] Step 1.1: Classify parts according to the parts product tree, for example, structural parts, plate parts, sheet metal welding parts;

[0036] Step 1.2: Classify the corresponding tooling structures according to different part structures, and divide them into different modules according to the structure. By solidifying and optimizing the modular components of the tooling, different tooling component modules are formed, and a parametric tooling design resource library is established.

[0037] Step 2: Use the 3D modeling software UG to call the tooling design resource library; the specific calling process is as follows:

[0038] Step 2.1: Select the corresponding category according to product classification;

[0039] Step 2.2: According to the required tooling structure and functional requirements, select appropriate tooling structure modules from the resource library and conduct modular design by combining tooling component modules;

[0040] Step 3: Select the appropriate template and adjust the parameters according to the design parameters of the tooling to be processed; the specific expression is:

[0041] Step 3.1: Adjust the parameters of the selected module to meet the design requirements of the new tooling. By adjusting the variable values, call the relevant parameters, for example, Figure 3 The module structure contains variable values ​​a and b. When the variable value a is called, the number of bolts and nuts in the outermost circle is 8. When the variable value b is called, the number of bolts and nuts in the outermost circle is 6. There must be a parameter diagram on the calling interface;

[0042] Step 3.2: Then set the defined main parameters and related auxiliary parameters;

[0043] Step 4: Generate a 2D drawing of the template. First, create a 2D drawing template and construct the interrelationship expressions of the various dimensions in the drawing. By setting the parameters in step 3, all dimensions in the 2D drawing are automatically converted. Dimension annotation association is achieved, and local changes can be made to the 2D drawing.

[0044] like Figure 1 As shown, by calling the tooling design template library, the relevant tooling for the specified part is selected. At the same time, the standard parts used in the tooling are selected and called into the tooling. Then, an engineering drawing is formed, and a two-dimensional drawing is generated through the UG drawing function, and a CAD format drawing is exported. The operating system usually uses a 64-bit operating system, and the server hard drive must have sufficient space and at least 32G of memory. Post-data maintenance is achieved by updating each database through the knowledge and resource library. The knowledge and resource library enters the latest summarized module structure and stores the content as a 3D model file in PRT format. The resource library has a multi-level tree structure and can be updated.

[0045] like Figure 2 As shown, the tooling design resource library constructed by the present invention is specifically divided into:

[0046] Tooling design standard parts library: including general parts, fixture parts, mold parts, measuring tool parts, cutting tool parts, etc.

[0047] Tooling design template library: including measuring tools, cutting tools, fixtures, molds and other related tooling structures.

[0048] like Figure 3 As shown in the figure, except for the disc which is obtained by modular design, the other parts are standard parts.

[0049] The disk is formed by rotating a parametric cross-section through the center of rotation.

[0050] like Figure 4 As shown, when using the module, enter the design interface and change the corresponding parameter dimensions in the modularization according to the part positioning reference, positioning stop size, clamping bolt size, quantity and center position. Figure 4 In the figure, d represents the diameter of the locating stop, d1 represents the diameter of the center of the bolt, h1J represents the height of the locating ring, h1 represents the height of the locating ring at the locating position, and h represents the overall height of the fixture.

[0051] like Figure 5 As shown, the method of the present invention can automatically generate two-dimensional engineering drawings, significantly improving tooling design efficiency. Using traditional tooling design methods, a moderately complex tooling set would take 5-7 days to design, and additional time would be required for proofreading and review. Using the method of the present invention, designers only need to parametrically drive the modules to design a new tooling set in a day or a few hours, eliminating the need for proofreading and reviewing, thus increasing design efficiency severalfold. This can shorten tooling design cycles and accelerate new product development by over 10%, while saving both manpower and time. Modular design reliably ensures tooling design quality. Tooling design modules are carefully developed and repeatedly tested, resulting in optimized design structures that eliminate structural design errors and prevent tooling scrapping due to improper tooling structures. The automatic generation of two-dimensional engineering drawings reduces tooling repairs caused by structural dimensional errors between tooling components, thereby reducing tooling repair costs. Based on the current 50% tooling repair rate, this can reduce tooling manufacturing costs by over 20%.

[0052] Simplify tooling design and reduce the difficulty of tooling design. Modular design is that designers enter the design interface under the UG platform, select the corresponding module, enter the parameters that need to be changed and simple operations, such as Figure 2 As shown, it is possible to design a tool and automatically complete the two-dimensional engineering drawing. Due to the modular design, it does not require designers to have high technical level and rich design experience, which reduces the difficulty of tool design and greatly improves the efficiency of tool design.

Claims

1. A modular design method for tooling based on UG, characterized in that: include: Step 1: Collect 3D models of standard parts and tooling for aircraft engines and build a tooling design resource library; Step 1.1: Classify according to the parts product tree; Step 1.2: Classify the corresponding tooling structures according to different part structures and divide them into different modules according to the structures. By solidifying and optimizing the modular components of the tooling, different tooling component modules are formed and a parametric tooling design resource library is established; The tooling design resource library includes: Tooling design standard parts library, used to classify and store 3D models of standard parts; Tooling design template library, used to classify and store 3D models of various parts tooling structure templates; Step 2: Use the 3D modeling software UG to call the tooling design resource library; Step 2.1: Select the corresponding category according to product classification; Step 2.2: According to the required tooling structure and functional requirements, select appropriate tooling structure modules from the resource library and conduct modular design by combining tooling component modules; Step 3: Select the appropriate template according to the design parameters of the tooling to be processed and adjust the parameters; Step 3.1: Adjust the parameters of the selected module to meet the design requirements of the new tooling. By adjusting the variable values, call the relevant parameters. When calling the a variable value, the number of bolts and nuts in the outermost circle is 8. When calling the b variable value, the number of bolts and nuts in the outermost circle is 6. The parameter diagram should be displayed on the calling interface; Step 3.2: Then set the defined main parameters and related auxiliary parameters; Step 4: Construct the interrelated expressions of various dimensions in the template of the two-dimensional drawing. By setting the parameters in step 3, all dimensions in the two-dimensional drawing can be automatically converted.

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