Provision of the master link accuracy during assembling applying the group interchangeability method
The paper considers the methodology of calculation of the maximum deviations and group tolerances when applying the group interchangeability method on the example of the gap accuracy increase in the connection of the hydraulic cylinder with the rod. The application of the group interchangeability method (selective assembly) ensures high accuracy of the connection in low link dimensional chains, for example, in the rod-cylinder connection, which can occur in sucker-rod pumps and compressors. The essence of the method lies in the fact that the required accuracy of the gap in the connection is achieved by including the components (parts) into the dimensional chain, belonging to one of the groups into which the parts are previously sorted. The application of the group interchangeability method provides an effective solution of technological problems of increasing the gap (tightness) accuracy during the assembly of oil and gas engineering products.