Practice of Dimensional Modeling in the Implementation of the Methodology of Group Interchangeability

Abstract

This paper is devoted to the modeling of dimension links during assembly using single-loop graph dimensional schemes, which describe the connection of separate parts during the implementation at an assembly site of group interchangeability methods, which reflect the specific conditions of the current production. Within the context of dimension modeling, the calculations based on the developed mathematical model which could be applied to both single-loop and multi-loop dimensional schemes with dependent dimension chains are evaluated. In particular, an algorithm for large-scale production, which consists in determining the dimension scatter range of the assembled parts by means of sorting into dimension groups is evaluated. The design procedure considered on a specific example, which describes one of the variants of interaction of the dimensional relationships of the parts. The calculation procedures result in the formation of a common information model in the form of a numeric matrix representing the analog of the dimension of the scheme. In the final form, it accumulates the corrected values of tolerances, group tolerances, mean and limit deviations of each of the links within a given number of size groups. This form of representation of calculation results allows to simplify the mechanism of automation of calculation procedures to accelerate the process of modeling of assembly operations by this method.