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Application in the modeling of column gear reducer (School of Mechanical Engineering and Automation, Northeastern University, Shenyang ID)) * Fushun Vocational and Technical College, Fushun ID)),) Notable issues, such as the purpose of the development system, the selection of development tools Wait. By based! Ro/T00LKIT Toolbox! The application of ro/E secondary development technology in the modeling of gear reducer further elaborates the implementation! Ro/T00LKIT Basic steps in the secondary development and the preparation of source files, key technologies such as the generation, registration and operation of executable files. Finally, pass! Development practice in ro/E tt 1 With the rapid development of CAD/CAM technology, its application fields are widely used, and the engineering design industry and manufacturing industry have undergone profound changes. This is reflected in the structural design of products. Especially remarkable. New concepts and new methods such as 3D modeling technology, parametric design technology and virtual reality technology have penetrated into the traditional structural design and exerted an unprecedented role in the development of elegant engineering design technology.
In order for Pro/E software to maximize its potential in enterprise-specific product design, creating benefits is right! Ro/E for secondary development. That is to put! Ro/E is further enriched, improved, and improved, and becomes a user-applicable CAD/CAM application system.
2 Problems that should be paid attention to in secondary development 2.1 Defining the purpose of secondary development Before developing, it is necessary to clarify the nature of the product and the required design capabilities, thereby establishing the function of the designed product, the required design theory and human and material resources. Consider product updates and future market trends to maintain long-term availability and vitality.
2.2 Selection of development tools Self-developed products should be compatible with existing software. In particular, it is necessary to establish the problem of establishing the system's resource database data in the final development software to prevent the basic parameters from being changed after data transfer between different software. Also pay attention to solve the problem of data interface between systems. The solution usually uses a proprietary interface, with neutral files as the data transmission medium and a data exchange channel for establishing a central database. 2.3 Customized standardized application environment In order to allow all designers to work in an internationally standardized environment and ensure the correctness and standardization of the design products, it is necessary to customize the user-standardized Pro/E application environment, including setting the standard working environment. , definition and other three configuration files and setting model templates.
4 Modeling and development of cylindrical gear reducer The majority of the products of many units are stereotyped products. The serialization, generalization and standardization of such products are very high. The mathematical models used to design these products and the structure of the products are fixed. The difference is only the structural dimensions of the products. The difference in the structural dimensions is due to the same number of known conditions in different product designs. Caused by different values. For such products, the known parameters and other basic parameters that vary with the product specifications can be replaced by the corresponding variables, and then the computer automatically queries the graph database according to the known conditions and basic parameters, or is calculated by the corresponding software. All the data needed for drawing is automatically designed on the screen by specialized drawing generation software. Its working principle is as shown.
圄1 Styling Product Parametric CAD Design Working Principle Column gear reducer is a series of devices with high degree of generalization and standardization. It is an important part of mechanical equipment for various purposes. It undertakes functional mechanical equipment such as transmission power, shifting and switching motion direction through column gear reducer and meets various speed requirements. In the design of the column gear reducer transmission system, the three-dimensional parametric CAD/CAM technology has been applied to many large enterprises, greatly improving the design efficiency.
The selection of 5 cylindrical gear reducer development tools provides a variety of secondary development tools in Pro/E, commonly used: FAMILYTAB family table), PROGRAM program), UDF user defined features) and Pro/TOOLKIT. These tools can be used for rapid secondary development. The use should be based on the difficulty of the development function, the quality of the designer and the structural characteristics of the product. In view of the fact that the column gear reducer system customizes a large number of customized commands in the Pro/E environment, it needs to interact with its low-level database information to complete more complicated operations. Therefore, I chose the Pro/TOOLKIT toolkit as a development tool.
The Customization Toolkit, also known as the User Interface (API), provides a number of C language library functions that enable external application-grinding applications to access Pro/E databases and applications safely and efficiently. And through the seamless integration of C programming and applications with Pro/E systems, customers and third parties can add the required functionality to the Pro/E system and debug with a third-party build environment.
In general, the Pro/TOOLKIT application has two modes of operation: one synchronous mode consists of two modes, namely the vibration of a dynamically connected library model machine. Separating the signal of the monitored machine from the measured aliasing signal and reducing the influence of D sound is the basis for improving the accuracy of fault diagnosis. Here, the fourth-order cumulant zero-forcing algorithm is used to separate the vibration signals of the machine. The ik method is validated by the simulation signal and the separation of the measured vibration signals in the laboratory. It can be used as a signal preprocessing method for fault diagnosis of rotating machinery.
In the diagnosis of rotating machinery faults, it is often encountered that the vibration signal measured from the monitored machine, in addition to noise interference, is also aliased with signals from other machines. Separating the signal of the monitored machine from the measured aliased signal and reducing the influence of noise is the basis for improving the accuracy of fault diagnosis. Using traditional filtering methods not only filters out noise, but also filters out useful information. Here, the blind source separation method is introduced into the field of rotating machinery fault diagnosis, and the fourth-order cumulant zero-forcing algorithm is used to separate the machine vibration signals for further forms and main size parameters. The column gear reducer is composed of a box body, a shaft structure, a threaded connection, an attachment, and the like. Each part extracts the required part template from the database, and drives the parameter design by the deformation design method provided by the system to create a new part. Then, combined with the requirements of the overall design planning, the subsystem is automatically assembled to generate the overall model, and finally the inspection tool is passed. The assembly is subjected to interference check in both static and dynamic conditions. After the assembly is correctly designed, the motion simulation and finite element analysis of the transmission assembly are performed using the Pr/MECH) EIC) module. The force condition of each part under external load is calculated by the simulation system of the force of the transmission assembly. The stress and strain of each part are then calculated by the structural module of Pr/MECH)EIC).
By analyzing the calculation results and combining previous experience, it is determined whether the design can meet the design requirements. Parts that do not meet the requirements are modified and optimized to meet design requirements. Finally, the new design is stored in the pre-design resource library and is constantly improved and generates detailed system drawings, part attribute lists and refinement documents.
In the operation, taking into account the needs of users, using Pr/TGGLKIT to compile a human-computer interaction interface, and using menus, dialog boxes and information display technology to help users easily use the system.
3 Conclusion Pr/EE software powerful secondary development function applied to 3D CAD product design can make the most effective design process for users to greatly improve design efficiency and reduce workload. The design of the system can not only better achieve the design and high efficiency, but also reflect the application value of the secondary development technology.
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