температура

This paper presents the findings from numerical modeling of the turning process of titanium alloys with preheating of the workpiece. This modelling was conducted using the DEFORM-2D software environment, which is based on the finite element method (FEM). The objective of this study is to investigate the influence of workpiece temperature on cutting force and to determine the optimal heating parameters for machining materials that are challenging to process.

Problem statement and the research purpose. Problem statement and purpose of the work: This paper presents a method for predicting the temperature of carbide tools used for cutting gear wheels with the Power Skiving method. This task is particularly relevant for automated equipment, including gear-cutting machines.

This paper is dedicated to the development of a unified system for monitoring microclimate parameters in the terrariums of the Kyiv Zoo. In cooperation with zoo representatives, existing methods and devices for artificially creating a microclimate in exhibition modules were reviewed and analyzed. The issues of this process were examined, and the main parameters for animal housing conditions were determined, such as air or water temperature, humidity, illumination, and the level of ultraviolet radiation. Six exhibition modules were selected for experimental studies.

Contact methods are usually used to measure the temperature of industrial technological objects. When using the contact method to create the necessary conditions for heat exchange, thermal transducer must be in direct contact with the object of study, the temperature of which must be measured. When measuring stationary temperatures, the readings must be taken after a certain time interval from the moment of contact of the thermal transducer with the object of study, when a state of thermal equilibrium is established between them.

The article is devoted to the study of the features of continuous monitoring of changes in the color of information channels of passive pressure-temperature sensors, tracking the spectral distribution of the light intensity of the liquid crystal color depending on the operating conditions. The main direction of application of such sensors can be “screening” of chemically active environments, deployment of temporary objects of short-term use in conditions of a pandemic, or military operations, etc.

Problem statement and the research purpose. One of the main factors determining the intensity of tool wear is the temperature that arises during the cutting process. Thus, the objective is to investigate the patterns and obtain dependencies of heat generation and heat transfer between the elements of the cutting process that characterize the temperature of the tool’s teeth and blades.

The temperature of gas flows is an important parameter during the research of heat and mass transfer processes, in the field of gas dynamics, as well as in manufacturing. Therefore, it is necessary to ensure a high level of requirements for the accuracy and reliability of the primary means of temperature measurement. The basic requirements are the simplicity of the design of the thermotransducer, its low thermal inertia, small dimensions, and high reliability during operation in aggressive environments at high temperature and pressure conditions.

Static and dynamic characteristics of the drying process as an object of automation are experimentally determined in the work. It was established that the drying object can be represented as two linked "air" – "drying object" and has interconnected input and output parameters. A mathematical description of the static and dynamic characteristics of the drying process as an object of automatic regulation has been researched and carried out.

The work proposes the use of a unique method of creating passive, multifunctional, non-contact pressure-temperature sensors. The basis of this method is a combination of inorganic semiconductors and high-molecular organic cholesteric crystals. According to their morphology, such crystals represent a spiral structure that is sensitive to changes in external physical factors, such as temperatures, due to changes in the periodicity of the structure, which leads to Bragg diffraction scattering of light on it.

Розглядається стаціонарна задача теплопровідності для ізотропної смуги з наскріз- ним чужорідним теплоактивним прямокутним включенням. За допомогою кусково- лінійної апроксимації температури на краях включення та інтегрального перетворення Фур’є побудовано аналітично-числовий розв’язок задачі з крайовими умовами другого роду. Виконано числові розрахунки температурного поля та проаналізовано їх для заданих геометричних і теплофізичних параметрів.