Application of the most popular proe parameterizat

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Application of pro/e parameterization technology in stamping die CAD

1 introduction

computer aided design software pro/e is a parameterized solid modeling software, which can not only generate real geometric shapes, but also carry out accurate model analysis, motion analysis, interference inspection, etc. The parametric feature modeling technology of pro/e greatly reduces the drawing workload of designers and improves the efficiency and quality of product design. By using the corresponding development tools and technology of pro/e to develop the stamping die computer aided design (CAD) system, the part design, assembly design and processing design can be carried out at the same time, so as to shorten the production cycle of the die and improve the product quality

2 composition of stamping die CAD system

stamping dies can be divided into blanking dies, bending dies, stretching dies, forming dies, etc. according to the nature of the process. No matter what kind of dies, they basically need upper and lower dies, guiding devices, pressing devices, positioning devices, etc. Therefore, stamping die CAD system is a convenient and easy-to-use design system integrating stamping die design system, stamping die processing simulation, and stamping die work simulation, The system composition is shown in Figure 1

Figure 2 shows an interface of the system running in pro/e environment

3 application of pro/e parametric technology in stamping die CAD system

pro/e software not only provides powerful functions of design, analysis and manufacturing, but also provides users with a variety of parametric design and development tools. Stamping dies contain not only a large number of standard parts and common parts, but also some special parts through mechanical barrel. When designing and applying parts, the secondary development tools of pro/e, such as family table, pro/pro2gram, pro/toolkit, etc., can be used to develop them efficiently and quickly

3. 1. Development steps of parametric design based on pro/e

parametric design and development based on pro/e generally has three steps: ① use the solid modeling and parameter driving function of pro/e to model parts; ② Set the parameters of the built model and the relationship between parameters, so as to meet the needs of parameter driving - using the relationship drop-down menu in the tool menu; ③ Use the tools provided by pro/e to carry out parametric design and development

3. 2 development and application of parametric design

(1) application of family table technology

in part design, if some parts have the same structure but different sizes, then these parts do not need to be established one by one, and a parent zero high temperature superconducting block, wire, film preparation and industrialized utilization technology can be established; Preparation and utilization technology of new Fe based high temperature superconducting materials; The new diaphragm and carrier parts for high-power, high-energy storage, high-efficiency active power batteries, light solid-state fuel cells and high-efficiency secondary batteries define the parameters that control the shape and size of each part, and obtain the required derivative parts by changing the values of each parameter in the design, so as to establish a series of parts. The collection of these parts is called the family table. Since the structural shape and size of standard parts have been standardized, the standard part library in the mold design system is developed by using family table technology, so that the design purpose can be achieved conveniently and quickly. Figure 3 shows the interface of designing parts by using family table. When creating parent parts, you should pay attention to the following two problems:

① parent parts generally use the standard parts with the largest size among the standard parts of the same type

② the parent part should contain all the features of the standard parts of the same type

(2) application of pro/program technology

pro/program is a document that records the process of model establishment. It records the steps and conditions of model generation, including the establishment process of all features, parameters, dimensions, relationships and other model information. The system writes the information of each feature established into the program, and users can change the characteristics of parts through a very simple program language. Through "program", we can control the appearance of features in parts, the size of dimensions, the appearance of parts in assemblies, the number of parts, etc., so as to easily design a series of different products. Because the structural shape and size of common parts are similar, the technology of P conductivity 0.01s/cmprogram is used to develop the common parts library in the mold design system

pro/program program is composed of five parts in sequence: program title, input prompt information, input relationship, added features (or parts), and quality characteristics. Users can add modifiable parameter names between the input prompt information parts (input and end input) as needed

(3) application of parametric design technology based on pro/toolkit

there are two development methods of 3D parametric design based on pro/toolkit: ① using feature description method to complete feature modeling by using the underlying functions provided by pro/toolkit, and establish man-machine dialog box to realize 3D parametric design. This method has cumbersome program design, and it is very difficult to generate 3D model by program for products with complex shape; ② It adopts the combination of three-dimensional model and program control. The basic process is under pro/e environment. 14. Overload protection: when the load exceeds 2-5% of the maximum value, it will stop automatically; The three-dimensional model is generated interactively, and then a set of design parameters that can completely control the shape and size of the three-dimensional model are established according to the design requirements of the part based on the created three-dimensional model of the part. The parametric program is programmed for the design parameters of the part to realize the functions of retrieving and modifying the design parameters and generating a new three-dimensional model according to the new parameter values. Its process is shown in Figure 4. This method can generate product models with complex shapes, and the programming is relatively simple, which is adopted by the majority of developers

the development of three-dimensional parametric design with program control model mainly includes three items: acquisition and display of parameter objects; Update and modify parameter objects; Regeneration of the model. Figure 5 and Figure 6 are an example of development using the method. Figure 5 is a part model template. You can change the size of one of the parameters to regenerate the part, and you can also select the parameter series values from the list to regenerate the part. Figure 6 is the situation of regenerating the part after changing the thickness to 50 minutes

4 conclusion

parametric design is a subject raised by CAD technology in practical application. Using parametric design means, we can not only develop special product design system, but also carry out parametric design of products, so that designers can be freed from a large number of heavy and trivial design work, easily realize the simultaneous implementation of part design, mold design, assembly design, processing design, etc., and speed up the mold design process, Shorten the design and manufacturing cycle, enhance the ability of new product development, and enhance market competitiveness. (end)

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