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Improving the quality of adhesive joints in helicopter assemblies using directional formation of the adhesive layer combined structure

An analysis of existing methods for assembling adhesive cylindrical joints revealed the need to provide for the possibility of forming an adhesive layer directly inside the annular gap, which will lead to uniformity of the adhesive layer, the absence of voids, overspending and smudges of the adhesive composition. The authors proposed a fundamentally different method of assembling cylindrical adhesive joints, resultin to the directed formation of the combined structure of the adhesive layer. Performing this method almost eliminates the listed types of defects, which results in a significant increase in the stability of the assembly process and an increase in the quality of the connection. In addition, there is no need for holding the joint after assembly. One of the key features is the use of a double-seam structure of the adhesive layer. The stability of the directional formation process of the adhesive layer is especially relevant when assembling highly responsible assemblies, for example, assemblies in helicopter engineering. To identify the assembly conditions of the proposed method, an experimental study is conducted. The experimental technique, experimental setup, and some results are presented.