ІНФОРМАЦІЙНЕ ЗАБЕЗПЕЧЕННЯ РОЗМІРНОГО МОДЕЛЮВАННЯ ТА АНАЛІЗУ ТЕХНОЛОГІЧНИХ ПРОЦЕСІВ

Abstract

Dimensional modeling and analysis (DMA) of TP is one of the stages of designing technological processes (TP), which is important for their rapid introduction into production and ensuring the necessary level of accuracy parameters of parts. The task of reducing the terms of DMA TP is urgent due to the need to reduce the terms of technological preparation of production, the time and resources spent on the implementation of TP. Solving such a problem requires the creation of appropriate programs that would ensure the automation of DMA TP procedures and reduce the requirements for user qualifications. At the same time, the level of existing programs or individual modules for dimensional modeling and analysis of technological processes isinsufficient, requires significant amounts of preparatory work and does not provide an acceptable level of time reduction and requires high qualification of users. This indicates the need for further development of programs, in particular in the direction of automation of procedures.Creation of algorithms and development of a program, based on them, for the automated execution of the main procedures of dimensional modeling of TP, including the most time-consuming and complex ones, such as the formation and calculation of operational dimensional chains, and increasing, due to its use, the productivity of DMA TP, while reducing the level of qualification requirements for users, in comparison with existing programs and "manual" methods.The program implements more than 10 different algorithms that are based on and use ideas and theoretical propositions that provide formalization and programmatic implementation of the main procedures of DMA TP. The main new ideas, thanks to which the program solves the problem of automating the formation and calculation of dimensional chains, in particular, are a system for coding the sizes and surfaces of parts and workpieces, which provides identification of the types of dimensions and links of operational dimensional chains, and is also used for the formation and control of dimensional chains; calculation of basing errors using dimensional chains and taking into account the mutual compensation of errors of technological dimensions, which are used for the creation and software implementation of the algorithm for estimating the predictive accuracy of technological and design dimensions; presentation of the structure of dimensional relationships of TP with the help of matrices, which ensures the automated formation of operational dimensional chains; as well as a number of other tasks necessary for the implementation of the general algorithm of DMA TP.Algorithms and the "RMA TP" program were developed for their implementation based on the formalization of the main procedures of DMA TP, which ensures: 1) automated execution of the most complex and time-consuming dimensional modeling procedures with the provision of information on ensuring the TP of the specified accuracy of design dimensions, as well as the calculated values of dimensional parameters of design, technological dimensions and allowances; 2) a significant reduction in time spent on dimensional modeling and analysis of technological processes, which, in combination with a convenient user interface, paves the way for widespread use of DMA TP in the design and implementation of technological processes in production. Using the program allows you to reduce the time spent on dimensional modeling and analysis of technological processes by 8-10 times, compared to "manual" methods, while reducing the level of qualification requirements for users. This opens up new opportunities for wide use of DMA TP in production, and therefore for improving the quality of developed TP and shortening the terms of technological preparation of production. The program can be used as an independent module, as well as a CAD element of technological processes.The article is a publication of scientific and methodical character.