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No 1 (2023)
МАТЕРИАЛООБРАБАТЫВАЮЩИЕ СТАНКИ
Thermal Rigidity Of Machine Tools. Physical Fundamentals. Evaluation and Control. Part 1. System of Rigidity Concepts For Machine Tools
Abstract
Basic principles of rigidity estimations and their description in physical processes of elastic deformation as an
important element to be considered in design of metal-cutting machines are discussed in terms of requirements to machine tools accuracy and precision. Besides, influence on the machine tool thermal factors which also lead to temperature errors and cause the accuracy changes of the machine tool are considered.
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36-40
Quality and Accuracy Increase of Aircraft Engine Parts Productivity on the Basis of Rational Application of Multi-Axis Grinding Machines with CNC
Abstract
The developed technology of nozzle blades machining on a 5‑axis CNC profile-grinding centre is presented. It increases productivity and quality of machining by increasing in quantity of machining surfaces of aircraft GTE nozzle blades from one installation, and also application of new highly porous grinding wheels and rational regimes of depth grinding. Combined use of machine tool NC system and special software to correct errors of parts casting surfaces during their installation, turning and depth grinding of base surfaces is considered.
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ТЕХНОЛОГИИ ОБРАБОТКИ МАТЕРИАЛОВ
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Mathematical Model of the Technological Process of Deep Drilling
Abstract
This paper presents an analytical mathematical model of a dynamic deep drilling technological system. The mathematical model was created on the basis of differential equations for the purpose of controlling an object – a technological drilling system. The control is carried out along the channel of the longitudinal feed of the tool, along the axis of the drill.
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Increase of PLA Polylactide Forming Tools Strength by Hardening Method
Abstract
The results of study of thermoplastic polymer (PLA) complex properties are presented. On the base of these results, the mode of 3D-printing of forming tool used for spatial
bending of steel pipes of small diameter is determined. The optimum hardening mode providing the best set of mechanical properties of the tool has been determined.
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TOOLS AND TOOL SYSTEMS
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MACHINE SCIENCE
Experimental Evaluation of the Influence of the Train Control Valves Configuration on the Brake Wave Propagation
Abstract
The paper discusses the issues of the automatic brake control system efficiency of a freight train. A hypothesis is put forward indicating the possibility of improving the
current braking system of a railway car with some change in its configuration. Practical recommendations are given to improve the current braking system of railway cars and
a conclusion is made about the possibility of introducing gas-dynamic process accelerators into the machine-tool industry.
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