ОПРЕДЕЛЕНИЕ ПРЕДЕЛЬНЫХ ОТКЛОНЕНИЙ НОМИНАЛЬНЫХ РАЗМЕРОВ ДЕТАЛЕЙ ТЕСТОДЕЛИТЕЛЬНЫХ МАШИН ВАКУУМНО- ПОРШНЕВОГО ТИПА

Abstract

The main method for determining the wear of parts is micrometer measurements of the output of the nominal size for the maximum deviations of the tolerance field. To determine the wear of parts during micrometric measurements, difficulties arise due to the lack of regulatory and technical documentation for equipment with design drawings of parts. One of the possible ways to determine the maximum deviations of the nominal size of parts was the method of calculating the size chain when solving the "direct" or "reverse" problem. (Research purpose) The research purpose is in determining the maximum deviations of the nominal dimensions of the parts for the suction chamber of the test separation machines of the vacuum-piston type by calculating the size chain. (Materials and methods) A caliper ShTs-II 0-160 was used to measure the external and internal nominal dimensions of the suction chamber parts. The input parameter for the calculation was the minimum technological gap in the joints of the parts equal to 50 micrometers, and the maximum one equal to 100 micrometers. The article presents the tolerance of the closing link by the probabilistic method of calculating the components of the links. (Results and discussion) The maximum deviations of the nominal dimensions of the parts for the suction chamber were determined by calculating the dimensional chains for the width and height of the parts when solving the "direct" problem. (Conclusions) The obtained limit deviations allow us to determine the wear of the parts for the suction chamber of the vacuum-piston type dough separating machines when the outer size of the part exceeds the lower limit deviation, and the inner size of the part exceeds the upper limit deviation.