Application of additive technologies in the restoration of polytechnic type objects with periodic tooth profile

The topic of restoring polytechnic exhibits is very relevant and in great demand by the community of scientific and technical museums, where, according to the results of current surveys of museum workers and their managers, the need for restoration of exhibition and archival funds is in first place. The article provides examples of restoring the lost parts of kinematic models from the historical system collection of the BMSTU Museum, issues related to measurements, manufacturing, selection of equipment and materials, and final installation of “grown” gear parts using additive technologies are considered. In the last 10 years, these processes have become widespread, and are still one of the most convenient and rapidly developing technologies for the production of parts and assemblies for the restoration of polytechnic objects. In the article, the authors highlight promising areas for using additive technology products in the museum space in the form of visual models, art objects, copies, duplicates, etc. The work of restoring the loss of polytechnic museum exhibits required high interdisciplinary interaction between various specialists, both technical and humanitarian fields of science, education and culture, and the authors believe that the experience shown in this article will be of interest to a wide range of readers. The proposed material is published for the first time