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1 Introduction
CAPP (ComputerAidedProcessPlanning) refers to the use of computer software and hardware technology and supporting environment to use computers to perform numerical calculation, logical judgment and reasoning to formulate the machining process of parts. With the help of the CAPP system, the problems of low efficiency, poor accuracy, unstable quality, and difficulty in optimization of manual process design can be solved. It is a process in which the computer automatically outputs process documents such as the process route and process content of the part by inputting the geometric information (shape, size, etc.) and process information (material, heat treatment, batch, etc.) of the processed part to the computer.
2 Structure of rolling bearing CAPP system
CAPP is a process in which the computer automatically outputs process documents such as the process route and process content of the part by inputting the geometric information (shape, size, etc.) and process information (material, heat treatment, batch, etc.) of the processed part to the computer. Considering the characteristics of high precision and high degree of production automation of rolling bearings, the rolling bearing CAPP system has different characteristics from other CAPP systems in terms of parts description, process generation and process file output. If the differences between them are ignored and their commonalities are extracted, a typical structure of the rolling bearing CAPP system can be obtained, as shown in Figure 2.
The task of this component is to help select knowledge, complete the establishment of knowledge base, check the static consistency and redundancy of knowledge, and manage the knowledge base. Its basic function is to propose functional modules and expressions suitable for developing and describing process decision-making knowledge, resource information, part description information, process parameter optimization operation and process design specification data, tables, etc., and develop it into different types and different levels of knowledge bases.
2.1.2 Part description and information input components
Its sub-components include human-computer interaction input component, public database retrieval component and information input component connected with CAPP system.
2.1.3 Process generation components
This component is the core component of the rolling bearing CAPP system, and its function is the process of producing the rolling bearing. Due to the characteristics of rolling bearing parts, the process generation component is composed of retrieval type generation process, comprehensive generation process, intelligent generation process and inference mechanism components. For different types and different characteristics of rolling bearings, retrieval type, Comprehensive, start the inference engine for intelligent design or combine several methods to generate the technological process of rolling bearings. When users use the standard components to generate the rolling bearing CAPP system, they can select one, several or all of the sub-components according to the specific conditions and characteristics of the company's production to assemble the components to form the process generation components of the company's rolling bearing CAPP system.
2.1.4 Management components of equipment and tools, clamps and measuring tools
This component provides a database of various equipment and tools and its management system. The equipment library and tool library of the unit can be easily established with the help of this component for use in process decision-making and production scheduling.
2.1.5 Interpreting module components
Provide a clear explanation of the behavior of each stage of process design.
2.1.6 Component of rolling bearing parts information library
Since rolling bearing parts are a kind of parts with national standards, the parts information of various standard rolling bearings is stored in the rolling bearing parts information database, including the characteristics and codes of rolling bearing parts. It is the basis for process design.
2.1.7 Process output components
Its sub-components include: process drawing output component, process file output component, NC (Numerical Control) processing instruction output component, and process output component connected with printers and plotters. Using this component, the generated process diagrams, technological processes and NC machining instructions can be output to the computer screen or output them through a printer and a plotter.
2.1.8 NC machining instruction generator component
This component refers to the bearing processed by CNC machine tools.
2.1.9 Dynamic simulation component of machining process
Dynamic simulation of machining process is a very important work.
Through simulation, it is possible to check the possible unreasonable phenomena and possible interference and collision phenomena in the machining process of the parts, and display the process parameters in a graphic way to visually simulate the machining process of the parts.
3 Comparison of CAD design process of rolling bearing and CAPP design process
After receiving a product process development and design task, the designer of the enterprise needs to carry out process design.
The CAD design process takes 10 steps, and there is a lot of manual input information, such as product, component attribute information, product structure information, product, and component graphics information. The CAPP system can save the process information summary function and summary information in units of products and components. It can not only provide part process information, but also provide product process information: including process route, material quota, working hour quota and related process documents. Significant savings in the process development process. The comparison between CAD design flow chart and CAPP design flow chart is shown in Figure 3 and Figure 4: The design flow of CAPP is very simple.
4 Conclusion
Since the rolling bearing process design itself is a complex and multi-level process, the rolling bearing CAPP system is a tool that frees the technicians from many process design work, and helps to achieve people-oriented pleasant operation, high efficiency Therefore, it can shorten the development cycle of bearings and improve the efficiency of process design.
Dear Sir ,Please give me a best price for : NTN 611GSS 21-29 qty 2 pcs price including shipping cost to Jakarta Indonesia . Thank you . Warm Regards
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| EX 45 /NS 7CE1 bearing | 45 | 75 | 16 |
| EX 45 7CE3 bearing | 45 | 75 | 16 |