Solutions in Limit Deviations for Optimum Dimensional Structures of Technological Processes of Machining

摘要

In the paper the analysis of the dimensional structure of different manufacturing process is made. There is shown that different schemes of designer sizes result in a different level of an optimality of a dimensional structure. At definition of number of the technological sizes as criterion of optimality it is necessary to allow both formation of the intermediate sizes and the effect of error's compensation. The detail subjected to machining, is characterized by constructive dimensional links which reflect, eventually, its functionality. The character of the constructive dimensional links is defined by the designer who takes into account the technological features of machine tools, but not to detriment of functionality. Therefore, carrying out of the dimensional analysis on a joint of these two phases is very important with the purpose of improvement of dimensional adaptability to manufacture of made details. One of criterions of this optimality has the structural nature. The effect of error's compensation is the reason for the change of the size's nominals and its limit deviations. For different variants of the linear dimensions is shown the way in which are changing the limit deviations of technological sizes.