Dissipative properties of lubricant and coolant fluid in cutting and friction

Ryzhkin, A. A.; Shuchev, K. G.; Aliev, M. M.; Гусев, В. В.

doi:10.3103/s1068798x08120198

Cited by 15 publications

(14 citation statements)

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“…High values of this parameter contribute to the manifestation of a number of factors unfavorable for the cutting process, among which we can highlight the deterioration of the tribological characteristics of the 'tool-chip' friction pair, an increase in the strength of thermal currents in the circuit, an intensification of the oxidative type of wear and a rapid increase in the size of the wear pit on the rake surface, etc. [1,2]. The temperature field on the rake surface of the cutting tool blade is formed due to heat generation in three successively located areas: in the zone of primary plastic deformations (PPD), in the zone of secondary plastic deformations (SPD) and the elastic contact zone (EC).…”

Section: Introductionmentioning

confidence: 99%

“…The temperature field on the rake surface of the cutting tool blade is formed due to heat generation in three successively located areas: in the zone of primary plastic deformations (PPD), in the zone of secondary plastic deformations (SPD) and the elastic contact zone (EC). The contact temperature reaches its maximum value at the border of the SPD and EC zones, in the same area due to the active access of oxygen the formation of a wear pit takes place [2] Among the various directions for determining the temperature on the rake and flank surfaces of the tool blades, it is possible to distinguish a scientific approach based and developed at the Department of Metal-Cutting Machines and Tools of the Don State Technical University, and associated with the application of hydrodynamic analogies to the assessment of the SPD processes in the processed material [3][4][5]. In this case, the surface micro volume in the chip is considered as a zone of quasi-viscous flow of the material, the release of heat in which occurs due to the viscous dissipation of frictional energy.…”

Section: Introductionmentioning

confidence: 99%

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Modeling of the temperature field on the rake surface of the lathe cutter taking into account the evolution of cutting forces

Fominov,

Gvindjiliya,

Lavrenova

et al. 2023

E3S Web Conf.

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This paper is devoted to modeling the temperature field on the rake surface of the hard alloy lathe cutter when turning the work piece from structural steel 30 for a given value of the operating time of the cutting system. The assessment of the thermal state is made taking into account the change in cutting forces during machining. To do this, a model of the evolution of the radial and axial components of the cutting force was built, taking into account its growth in time and the influence of irregular kinematic vibrational perturbations. The calculation of the average temperature values for each section of the rake surface was made on the basis of the scientific approach described earlier, according to which the heating of the contact occurs due to the viscous dissipation of the friction energy in the surface plastically deformed micro layers of the chip. The calculation of the temperature values along the rake surface was carried out by the finite element method on a solid-state model of a fragment of the cutting part of the tool, as a result of which temperature values for the control planes were obtained. The results of digital modeling demonstrate a good correspondence of the calculated temperature values to the experimental data obtained by the semi artificial thermocouple method. The error of modeling the temperature field without taking into account heat exchange with the environment was 7.7-8.6%.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modeling of the temperature field on the rake surface of the lathe cutter taking into account the evolution of cutting forces

Fominov,

Gvindjiliya,

Lavrenova

et al. 2023

E3S Web Conf.

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“…Cooling liquids or lubricants used equation a special attention, a greater quantity of liquid consumed can be harmful environment, a larger quantity of fluid can generate high production costs, depending on their chemical composition and reaction with various heated zones of the process may be harmful to the operator [3].…”

Section: Introductionmentioning

confidence: 99%

A study of fluid flow simulation in convergent-divergent nozzles

Olaru

2015

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract.A study of geometry nozzle is particularly important in optimizing the quantity of coolant in terms to minimize that quantity or coolant can be used for lubrication of machines moving parts. Coolants can be from the simplest (water, air) as well as a mixture of liquid (emulsions) to achieve a good cooling in function of temperature that develops in the area concerned. The study from this paper proposes an analysis and a simulation of flow through the convergent-divergent nozzle type to optimize them and to use a minimum quantity of coolant or lubricant. This study is focus on the analysis of cooling systems for cutting processes on machine tools.

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“…The levels of the temperatures while cutting can reach critical values, therefore the problem of evaluation of heat flows and temperatures using calculation methods is actual. Dependencies for calculation of the cutting temperatures for instruments with a straight cutting edge are known [1][2][3], but those dependencies can be used for the problem in a linear formulation, when it is impossible to determine the temperature distribution at any point on the front surface of the tool.…”

Section: Introductionmentioning

confidence: 99%

“…where: λ 2 -the thermal conductivity coefficient of the material of the workpiece; σ -the tensile strength of the workpiece material; a 2 -the thermal diffusivity coefficient of the workpiece material; τ-the contact time of the chip with the front surface of the tool equal to [1]:…”

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confidence: 99%

Evaluation of cutting temperature of a tool with a curved cutting edge

2017

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Abstract.A model for solving the problem of heat distribution along the front surface of a tool with a shaped profile is considered. Analytical dependencies for estimating the temperature of the tool of elliptic profile for turning with radial feed in Cartesian and polar coordinate systems are obtained for the model under consideration. As a result, the obtained dependences can be applied to similar thermal calculations of instruments with other forms of plane curves both in turning with radial feed and in milling conditions. The calculation of a flat temperature field on the front surface of a shaped tool has been carried out and it has revealed areas with the highest temperatures at the contact area and the maximum wear values.

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Dissipative properties of lubricant and coolant fluid in cutting and friction

Cited by 15 publications

References 0 publications

Modeling of the temperature field on the rake surface of the lathe cutter taking into account the evolution of cutting forces

Modeling of the temperature field on the rake surface of the lathe cutter taking into account the evolution of cutting forces

A study of fluid flow simulation in convergent-divergent nozzles

Evaluation of cutting temperature of a tool with a curved cutting edge

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