Vestnik MSTU "Stankin"

There is a number of issues to consider when developing collaborative robotic cells. The goal of this work is to develop a technical solution for a collaborative production cell designed for assembling through-hole components of printed circuit boards into their respective holes. To achieve this goal, a method has been proposed that includes task decomposition and allocation based on the capabilities of humans and robots, as well as the use of an ontological knowledge base for dynamic task allocation. Additionally, the design and integration of a vision system capable of recognizing humans and through-hole components have been examined. This work presents the architecture of a human-robot collaboration control system, which was tested in the CoppeliaSim simulation environment. The task execution process confirmed the effectiveness of the proposed methods and technologies, as well as demonstrated the potential for applying this control system in industrial production.

Osseodensification is an innovative surgical instrumentation technique based on additive (non-cutting) drilling using special burs. The osseodensification burs should operate in a clockwise direction to drill holes and in a counterclockwise direction to compact the osteotomy walls. For these purposes, the burs have special design features, like conical contour shape, increased number of helical flutes and negative rake angle on their peripheral part. However, although other parameters and features of the burs define their overall performance, they are not described sufficiently, and their influence on the surgical quality is almost unknown both for clinicians and tool manufacturers. The purpose of the present research is to identify the key design features of burs for osseodensification and their functional relationship with the qualitative indices of the procedure basing on analytical review of research papers and patent documents. It will help to further improve the design of osseodensification burs and thereby enhance the surgical quality and, ultimately, patient satisfaction. Results: The most important design features and parameters of osseodensification burs are identified. Thereon, the structural model of osseodensification bur is first represented as a hypergraph. Basing on the analysis of previous researches, functional relationships between design parameters of osseodensification burs, osseodensification procedure conditions and procedure performance data were established and for the first time described in the comprehensive form of a hypergraph. Conclusion: This study provides formal models that form the basis of database structure and its control interface, which will be used in the later developed computer-aided design module to create advanced types of burs under consideration. These models will also help to make good experimental designs used in studies aimed at improving the efficiency of osseodensification procedure.

The article deals with the design and development of a device for processing of oil grade pipe threads in the wellhead space. The existing solutions are analyzed, their main disadvantages are identified, such as the need to use bulky equipment and limited functionality when working with different types of threads. In response to the identified problems, a new portable device utilizing the planetary milling method is proposed, which allows to increase productivity and improve the quality of processing. The device is characterized by its versatility due to the ability to customize thread pitch and taper, as well as by the reduction of tool load due to optimal cutting modes. The developed design provides easy transportation and installation, which makes the device convenient for use in the field.

The article also presents the results of the patent search and a detailed description of the developed device with an indication of its main features and advantages compared to analogues.

This article reveals the possibility of ensuring the required accuracy of the shape of the surfaces of long flat parts made of VNS-2 steel by assigning rational parameters of cutting modes and heat treatment. For chromium-nickel steels of the martensitic class, there is a problem of their mechanical processing due to the large number of alloying elements. Steel also has a tendency to absorb the energy released during machining, which can subsequently lead to energy accumulation and its manifestation in the form of deformation. This strongly affects the formed parameters of the shape accuracy of the treated surfaces and, in some cases, the required tolerance value is not provided. The riveting shows the ratio of increased hardness relative to the initial one and can be used as one of the ways to control the occurrence of possible residual deformations in the surface layers of products. The microstructure of the surface layer is of no small importance, which has a significant impact on the resulting energy consumption during machining, as well as on the possible increase or decrease in the riveting. Conclusions are drawn based on the obtained research results.

The formula has been obtained for determining the force of cold volumetric stamping by extrusion of a glass- type part with a stepped cavity. The formula was obtained by conducting an experimental study according to the plan, which is the development of the method of Greek-Latin squares, as well as using the method of processing the research results described in the article. Extrusion was carried out in one transition with a punch, in which the working part has a stepped shape with a galtel under the step. The formula makes it possible to determine the extrusion force of a punch depending on the shape and size of the working part. To expand the scope of the obtained formula for calculating the cold extrusion forces of parts made of different materials having different cavity shapes, the extrusion forces, which also depend on the hardening characteristics of the workpiece material, and the dimensions of the stepped punch under study are considered and taken into account in the obtained formula in relative terms. The results of determining the extrusion force with a stepped punch have been verified by extrapolating the obtained formula to the shape of a smooth (stepless) punch. The verification showed the validity of the formula obtained.

The article considers practical aspects of developing an integration platform for aggregating data from various information management systems of production and logistics systems (PLS) of mechanical engineering enterprises to analyze their performance. A structural model of a solution for collecting data from heterogeneous information systems is proposed, which is flexible and scalable. A model of data collection and consolidation processes has been developed, which allows automating the data aggregation process for analyzing PLS performance.

Machine vision is the basis of control operations during inspection of blade surfaces for defects under UV light. When implementing automated control technology, it is necessary to solve several key problems: obtaining a package of inspection images of a complex profile control object (aircraft blade), determining the real parameters (sizes) of glows for single and group defects, forming expert recommendations (digital trace) for determining the presence of defects on inspected surfaces for the operator or automated systems. A method is presented for determining the distance between glows, eliminating their duplication, and classifying glows during luminescent testing of gas turbine engine blades. The classification is based on a comparison of the obtained indications with reference photomasks. The stages of analysis of classification characteristics and algorithms for their implementation are given.

In 2025, MSUT “STANKIN” will celebrate a significant date – the 95th anniversary of its founding. The country’s first higher education institution for the training of engineering personnel for the needs of the machine tool industry was established on July 12, 1930. Throughout the university’s history, its development and achievements have been determined by the activities of the leading departments and the outstanding scientists and educators associated with them. One of the leading departments of MSUT “STANKIN” today is the Department of High–Efficiency Processing Technologies (HEPT), which recently celebrated its anniversary – a quarter of a century since its establishment, and Professor Grigoriev Sergey Nikolaevich has been head of the department for 25 years. The personnel and scientific and technical base for the creation of the HEPT department was the Department of Cutting Materials, which traces its history back to the founding of the MSUT “STANKIN” and for many years has been a forge of personnel for enterprises of the machine tool industry in our country. At the helm of the department in different years were outstanding Soviet scientists and innovators – Pankin A.V., Glebov S.F., Krivoukhov V.A., Arshinov V.A., Tretyakov I.P., Starkov V.K., Vereshchaka A.S. Each of them is a separate epoch in the history of the formation and development of the department. Under the leadership of S.N. Grigoriev, the HEPT department has preserved and multiplied the traditions laid down by its predecessors. The department has formed a scientific school of highly efficient materials processing technologies, which has continued to develop not only classical research topics, but also laid the foundation for new areas of scientific and educational activities of the university, which today determine its scientific and technical leadership.

The article describes the history of the HEPT department, provides information about individuals who have made an outstanding contribution to its formation and development, and describes the department’s activities in various areas at the present time.