Development of Information Support for Intelligent CAD of Cutting Processes
The effectiveness of machine-building production depends on the extent to which the quality and accuracy requirements of products are met. The availability of computer-aided design (CAD) system, which offers the user to choose from the list of possible parameters of the cutting process the optimal ones under given conditions, would significantly improve the efficiency of the operating procedure. This problem can be solved by the use of CAD systems in the development of the operating procedure of parts machining. The use of various methods of artificial intelligence for the development of cutting processes CAD will facilitate the solution of difficult-to-formalize tasks arising in the design process. To create information support for intelligent CAD of cutting processes, it is necessary to design a database and a knowledge base of the main parameters of the processes being studied. First, the development of a database of the main parameters of the cutting processes is described. It consists of the following parts: a database of cutting tools, a database of metal-cutting machines and a database of materials to be processed. Structural schemes are developed and tables for each of the elements are compiled. The steps for creating a knowledge base for intelligent CAD systems of cutting processes are considered. A model of representation of knowledge and the knowledge base of cutting processes based on it are created. The structure of the frame model of the knowledge base for external lathe machining of stepped shafts is described. The knowledge base presents the frame structures: "Machines", "Processing conditions", "Cutting tools", "Cutting modes", "Parts", "Materials", "Workpieces", "Fixtures". More than 90 rules have been developed, according to which the values of frame slots are chosen. Thus, the problem of creating information support for intellectual CAD of cutting processes through the development of a database and a knowledge base of the main processes of materials machining has been solved.