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No 3 (2025)
ВЫСТАВКИ, КОНФЕРЕНЦИИ, СОБЫТИЯ
Metalworking‑2025
14-18
TOPICAL INTERVIEW
The work of the future: new realities, approaches, and opportunities
26-31
ТЕХНОЛОГИИ ОБРАБОТКИ МАТЕРИАЛОВ
Volumetric-surface hardening in railway bearings production for rolling stock and road transport
Abstract
The issues of producing bearings for railway and automotive rolling stock are considered, including dependence of bearing production on the import supply of materials, technologies, and machine equipment, which is a governmental problem. The presented analysis shows that it is possible to resume bearing production without attracting imports or minimizing them through domestic technology.
32-38
Application of rice husk ash in PVC production technology with a plasticizer to enhance water resistance
Abstract
Due to the wide use of the EDOS plasticizer, which has increased volatility, in technology of preparing polyvinyl chloride materials for machine engineering, its interaction with thermally treated rice husk has been studied to assess possibility of EDOS sorption on its surface to reduce plasticizer migration. Infrared spectroscopy studies confirmed partial adsorption of EDOS plasticizer on the surface of thermally treated rice husk (TRH) due to hydrogen bonds formation between this filler and the plasticizer, which allows to enhance water resistance of plasticized polyvinyl chloride compositions due to the lower leaching of EDOS when exposed to distilled water
40-44
Influence of material structure of parts obtained by additive technologies on their subsequent machining
Abstract
The features and problems of mechanical abrasive processing of parts depending on material structure and their properties are considered, and recommendations for preventing defects are provided. The features of processing polymer composite materials are determined, depending on material structure.
46-50
TOOLS AND TOOL SYSTEMS
Tools and tool systems
Abstract
New requirements for the design of boring bars are considered. For objectivity of the results of the study, certification of all boring bars connections was carried out. The dependences of rigidity of adaptive boring bars as part of technological system of a vertical milling machine on the variable load for various conditions of assembly of bar parts are obtained.
52-55
Influence of regrinding of worm cutters on the profile of their generating surface
Abstract
During the gear-cutting worm cutters operation when machining gear wheels, due to periodic regrinding of the cutters on the front teeth surface, distortion of the profile of generating surface of the worm cutter occurs, and, accordingly, the teeth profile of the machined wheel. To ensure processing quality and rational operation of gear-cutting worm cutters according to GOST 9324–2015, measures necessary to compensate for the resulting errors are defined and proposed.
56-61
Prospects for the application of polymer stamping tool
Abstract
The results of research aimed at expanding the scope of polymer materials application are presented. The fundamental possibility of manufacturing a working tool for stamping sheet plastic parts using the method of extrusion 3D printing is demonstrated. The results of modeling the stamping process with a plastic tool are provided. Contact stresses are determined, and the results of field experiments on the drawing of workpieces of "bushing" type with polymer tools of PLA and ePA-CF grades are presented.
62-67
ROBOTICS AND MECHATRONICS
Solution to the problem of velocities and positions for the modified rotopod mechanism with four kinematic chains
Abstract
An iterative algorithm for solving problems of infinitesimal displacements and, accordingly, velocities of the modified rotopod mechanism with four kinematic chains, whose output link has six degrees of freedom, is presented. The considered spatial mechanism can be applied in additive technologies and robotic complexes for processing parts of complex shapes, in measuring metrological systems.
68-71
ИНФОРМАЦИОННЫЕ ТЕХНОЛОГИИ
Features of standardization organization at a large machine engineering enterprise
Abstract
An analysis of information systems of standardization is presented. Based on the analysis, an integrated information system (IIS) consisting of CAD TP and 1C-ERP is proposed, and its effectiveness is assessed. The advantages of IIS are considered, as well as the main challenges organizations face when implementing and subsequently operating them.
72-80