Assessing the possibility of assembling long cylindrical parts

Abstract

Background. The object of the study is the conditions of assembly of long parts connected with tension, widely used in various industries. The subject of the research is assembly technology, restrictions imposed on the assembly process in its various types. The purpose of the work is to develop well-founded recommendations for the selection of connection parameters and assembly technology, eliminating the loss of stability, with the possible use of more advanced technological processes and connections. Materials and methods. An assessment is proposed that allows predicting the loss of stability during assembly of long parts of tension joints. The study of assembly processes is carried out taking into account the critical force according to the known Euler relation, taking into account the method of installation and fastening of parts during pressing. The equations of the elastic line of sections are determined using differential equations for individual sections of the shaft and hole. The curved axis of the conditional rod is described by a system of differential equations. Results. An assessment is proposed that allows predicting the loss of stability during assembly of long parts of connections with tension, and recommendations for eliminating the loss of stability of connection parts. An example of using the proposed assessment is given. Conclusions. The proposed assessment allows selecting the parameters of the connection and the technology of its assembly, eliminating the loss of stability. Technical solutions are proposed that allow implementing more advanced technological processes of assembly of connections.

Keywords

• tension joint
• long parts
• assembly
• stability prediction
• fastening schemes
• example
• technological solutions