Abstract Noise spectra are studied in two situations: during the simultaneous boring of two holes in a large housing; and during the turning of a wheel-pair shaft on a special lathe. The spectral composition of the noise is analyzed.

Abstract Backward and forward flow of working liquid through a resistive fluid diode of rectangular cross section is studied experimentally.

Abstract A method is proposed for the assembly of preloaded cylindrical joints on the basis of relative interchangeability. As shown in examples, this method permits the connection of shafts with a reparable defect and holes with an irreparable defect or the connection of shafts with an irreparable defect and holes with a reparable defect. By this method, the required joint accuracy with limiting preload

Abstract The influence of the configuration (group structure) of multipliers (gearboxes) on their mass, bulk, and dynamic characteristics is analyzed. The torsional system is studied, and the dynamic pliability of the gearbox is investigated.

Abstract Design problems associated with the development of CAD systems for industrial processes are considered. Automated design is considered in detail in relation to the creation of an information base, the display of design results, and the design operator.

Abstract The shaping of axisymmetric parts of uniform thickness such as caps from sheet of variable thickness is considered.

Abstract Experimental data are presented regarding the creation of effective friction stir welding tools. A design concept for a friction stir welding tool and the corresponding attachment is proposed, taking account of the constraints associated with the workpieces; the system consisting of the machine tool, the attachment, the tool, and the workpieces; and the requirements on tool life. The tool

Abstract In internal grinding with axial feed, each double pass begins with insertion of the grinding wheel in the workpiece in the reversing zone, by means of a radial insertion feed; the axial feed in this process is zero. Therefore, at that stage, the cutting conditions are fundamentally different than in machining the remainder of the hole, when the axial feed is nonzero. As a result, in the reversing

Abstract Thermoelectric modeling is based on the profound physical analogy between heat conduction and current flow in various media. In developing the equivalent circuit, steady machining is assumed (constant spindle speed and cutter feed). That corresponds to a dc circuit. Since the current from a source is constant in any circuit conditions, a current source is used in the circuit, rather than an

Abstract The influence of various factors on the strengthening, restoration and strengthening of metal surfaces by frictional cladding is investigated. Applying electric current intensifies the process. The coating thickness and plasticity are also increased.

Abstract Cyclic heat treatment of steel samples is considered as a means of increasing their abrasive wear resistance. Cyclic heating of 65Г steel parts to 450°С increases their wear resistance by 40% in comparison with traditional inductive quenching.

Abstract The determination of jackhammer parameters in bench tests is considered. Test procedures for determining the energy, vibration, and noise parameters of jackhammers are analyzed. This review provides context for the development of the SORP universal test bench and UIPU measuring system.

Abstract The performance of nonstandard slotting cutters with mechanical fastening of the cutting insert is studied experimentally. Proposals are made to decrease the consumption of energy (by mechanical fastening of the insert instead of soldering) and material (by repeated tool-holder use) and to ensure consistent quality of the cutting insert’s heat treatment in cutter production.

Abstract Analytical models are proposed for the static and dynamic shock elastoplastic deformation of tubular energy absorbers employed in a plastic shock absorber. The models may be used in shock-absorber design.

Abstract A method is proposed for predicting the life of structural components by analysis of the faults within a short initial operating period.

Abstract A method is developed for determining the corrective masses when saw blades of different length and thickness are combined in saw modules, taking account of the blade weight and size and also the tensile force. On that basis, the blades in the system may be changed without adjustments.

Abstract A model is proposed for calculating the actual radial feed in internal grinding on a CNC machine. The model establishes the relation between the actual and programmed feed, as a function of the cutting forces, the elastic deformation of the machining system, the cutting conditions, the wheel–workpiece contact geometry, the wheel characteristics, and other parameters. The model is used to predict

Abstract The factors responsible for periodic machining errors are analyzed, and corresponding mathematical models are proposed. Approaches to decreasing the periodic machining errors in machine tools are suggested.

Abstract In the development of irreparable machines, the volume of reliability tests may be minimized by extending the test time. Forced testing further decreases the test volume.

Abstract Production costs and product quality in manufacturing depend directly on tool life in cold and hot machining of metals and alloys. The types of surface failure in tools are considered in the present work. The potential for increasing their wear resistance by electrospark coating deposition is noted. The dependence of the relative coating thickness on the relative limiting carrying capacity

Abstract The theoretically possible reconfigurable parallel mechanisms are classified, in terms of the layout of guides on the base. Formulas are derived for the characteristic parameters of each type. On that basis, individual calculation templates are developed for formalized design of reconfigurable parallel mechanisms.

Abstract An AI-based temperature-control algorithm for motorized spindles is proposed. Fuzzy logic is employed in the algorithm.

Abstract A method is proposed for the classification of basing modules for component surfaces. The classification is based on the primary fitting dimension, a dimensional ratio, and the accuracy. An example of classification is presented for the B311.1 basing module.

Abstract The machining of metal surfaces and the application of functional coatings by means of a flexible tool (a rotating wire brush) is considered. Frictional cladding may be applied on metal-cutting machines by means of simple attachments or manual angle grinders.

Abstract Real-time diagnostics of modules in metal-cutting machines may be based on neural-network algorithms for simulation of the standard process, identification of defects, and the introduction of corrections in the cutting machine’s control system. The machining conditions in normal operation of the machine are recorded by means of a trained neural network with long short-term memory (LSTM network)

Abstract The basic stages in the transformation of information from designer to technologist are described, in relation to functional and support tasks. Groups of design and technological models of the part are considered.

Abstract A technology is proposed for the machining of keyways in long flexible shafts. The corresponding equipment is based on a lathe with an added frame that includes self-centering rests. That increases the accuracy of slot milling by a factor of 3–5.

Abstract The need for nonfunctional contact pads at internal layers of multilayer printed circuit boards (PCB) is still under discussion. Published papers argue on both sides of the issue [1–4]. In the present work, various perspectives regarding the utility of nonfunctional contact pads in electronic systems of different types are analyzed.

Abstract The strategic efficiency of a project is defined. An approach to assessing the strategic efficiency of projects is outlined. This approach, incorporated in the State Development Program, consists of three main modules, executed in eleven consecutive stages. It addresses the factors impeding the global competitiveness of enterprises. Aspects of aviation projects that are attractive to private

Abstract Optimization of industrial production by means of digital models is considered.

Abstract Nanomodification of a polymer matrix based on epoxy anhydride binder by means of silicate nanoparticles is considered. Attention focuses on how it affects the properties of basalt composites. The size of the SiO2 particles is 20–35 nm.

Abstract A refined mathematical model is developed for the prediction and analysis of the drawing force applied to nonhollow cylindrical blanks with a modified surface layer in machining by a tool with regular surface microrelief when innovative metal-cladding lubricants are employed and frictional wear is eliminated by the Garkunov–Kragel’skii effect.

Abstract A mathematical model is proposed for the rigidity of a triaxial parallel machine tool. The structure of the machine tool is resolved into components. A simulation algorithm is outlined, as well as a general system of mathematical equations for calculating the axial rigidity of a triaxial parallel machine tool.

Abstract With a fixed equivalence criterion, formulas for assessing the possibility that a material in a complex but static stress state will pass to a limiting (critical) state are compared.

Abstract The behavior of poorly heat-conducting coatings of low porosity on metal substrates is simulated. Analysis of the thermoelasticity reveals the influence of the unit heat flux and the thermal compressive and tensile stress on the limiting state of the coating–substrate system.

Abstract Theoretical analysis shows that cutting ceramic based on silicon nitride is much stronger if the recipe is as follows: \( \geqslant \)50% Si3N4, \( \geqslant \)20% Al2O3, \( \geqslant \)19% ТiC. Dispersional hardening may be ensured by means of intermetallic inclusions formed by alloying elements such as molybdenum (2–3%), beryllium, and boron (0.5–1%) and also carbide-forming metals (chromium

Abstract The manufacture, analysis, and testing of new iron-based frictional components (brake-pad blanks) operating with dry friction are considered. The components are produced by dynamic hot pressing and are intended for the transmissions of light, high-power tracked vehicles.

Abstract Organizational principles are proposed for informational components in systems for the automated standardization of industrial processes. The use of nomogram maps of information permits more accurate determination of the standardized parameters and shortens the algorithmic chain in the standard tables. A block diagram of an algorithm for reading the nomogram maps is presented.

Abstract In a tracked amphibious vehicle, combination of the hydraulic shutter-control drive for the water-jet propulsion unit and the mechanical control drive for operation on land is proposed. The combined drive does not need separate control rods and is lighter than the existing mechanical drives. In addition, a hydraulic amplifier reduces the effort needed to control the shutters of the water-jet