Estimation of triboelectric properties of high-speed steels

Ryzhkin, A. A.; Fominov, E. V.; Torop, Yu.A.

doi:10.23947/1992-5980-2017-17-2-31-37

Cited by 3 publications

(3 citation statements)

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“…Considering that the vibration activity of the tool and the cutting temperature are related to each other through the evolution (wear) of the cutting wedge under metal processing, a third task arises. It is assessing the residual tool life and/or providing the maximum value of this parameter [ 7 , 8 , 9 , 10 ]. In modern machine-building production, a tool is just a consumable material that must be replaced when its cutting properties are exhausted.…”

Section: Introductionmentioning

confidence: 99%

“…As a result of this approach, there is a gap between the subsystems of the vibrational activity of the tool [ 1 , 2 , 3 , 4 , 5 ] and the thermodynamics of the cutting process [ 6 , 7 ]; however, experimental studies show that such a relationship exists [ 9 , 10 ]. The second direction is related to the modeling of the temperature field in the tool itself, this approach is very well presented in [ 8 ], and it should be noted that this approach quite accurately connects the development of wear of the cutting wedge with the temperature gradient in the same cutting wedge. However, this approach has low practical application, since it is practically impossible to measure the gradient of the temperature field in the cutting wedge during cutting, and the interrelated dynamics of the cutting process and its relationship with the temperature are also not taken into account here.…”

Section: Introductionmentioning

confidence: 99%

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Turning Tool Wear Estimation Based on the Calculated Parameter Values of the Thermodynamic Subsystem of the Cutting System

Lapshin

2021

Materials

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Today, modern metalworking centers are not yet able to reliably assess the degree of wear of the tool used in metal cutting. Despite the fact that a large number of methods for monitoring the service life of the tool have been developed, this issue still remains a difficult task that needs to be solved. Idea: The article proposes a new, previously unused method for estimating the power of a cutting wedge in metalworking. The aim of the study is to develop a method for indirectly estimating the tool wear rate based on a consistent model of intersystem communication that describes the force, thermal and vibration reactions of the cutting process to the shaping movements of the tool. Research methods: The study consists of experiments on a measuring stand and a homemade measuring complex. It also uses the Matlab mathematical software package for processing and graphical interpretation of data obtained during experiments. The results show that the proposed method of estimating the current tool wear is applicable for the interpretation of experimental data. Statistically, the modified Voltaire operator of the second kind models the temperature more accurately; at the peak, this method is three times more accurate than the other.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Turning Tool Wear Estimation Based on the Calculated Parameter Values of the Thermodynamic Subsystem of the Cutting System

Lapshin

2021

Materials

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“…The studies of thermodynamic processes in the friction zone based on entropy balance equations obtained analytical dependence indicating that wear rates are lower for HA grades with large values of the thermal entropy S [1], [5]. It has been established experimentally that HA grades with high values of S have smaller values of absolute or relative thermo electrical moving force (thermo-EMF), which leads to a decrease in the magnitude of thermo currents in the cutting (or friction) zone and reduce the oxidative wear rates [1], [6]. Thus, when designing new HA grades preference should be given to structures characterized by highest values of the thermal entropy and minimal values of the thermo-EMF.…”

Section: Introductionmentioning

confidence: 99%

Tribological Characteristics of Experimental Hard Alloy Grades With Modified Cobalt Binder Under Conditions of Dry Friction on Titanium-Aluminum Alloy Vt-3

Beskopylny¹,

Fominov²,

Shuchev³

et al. 2019

PES

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The paper is dedicated to investigations of tribological characteristics of experimental tool hard alloy (HA) grades based on tungsten carbide with modified cobalt binder under conditions of dry friction on disks made of titanium-aluminum alloy VT-3, as well as measures of their surface micro-hardness. All measured parameters were compared with similar characteristics of standard HA grade VK8, on the basis of which these experimental grades were developed. The research found that the surface micro-hardness of all experimental HA grades as pins were higher than that for the basic grade VK8; the highest value was fixed for the HA grade with symbol mark 2.22 (composition of the binder -5.65% Co +1.8% Mo +0.6% Ti). The highest wear resistance was obtained for 2.23 (5.1%Co+2.7%Mo+0.61%Ti) and 2.21 (5.4%Co+1.43%Fe+0.82% Cu), the lowest -for grade 2.22. The analysis of friction processes peculiarities allows to explain the high wear resistance of grades 2.21 and 2.23 by features of surface structures ("the third body") formation during friction. Friction process for these HA grades include the periods of "the third body" intensive growth to the considerable thickness values, as well as the periods of its abrasion; due to this phenomena resulting wear rates for these two grades proved to be significantly lower than for the base grade VK8. The "third body" generated during friction protects surfaces from wear, at the same time it has its own significant shear resistance and increases actual contact area, due to this phenomena the friction forces for grades 2.21 and 2.23 are somewhat higher than for basic grade VK8. The grade 2.22 is characterized by the highest average friction force and its r.m.s. deviation value, which result in the greatest wear rates for both the HA pins and rotating disks. So according to the results of testing the best results among the investigated experimental HA grades were obtained for grade 2.23: the lowest average friction coefficient and the lowest track surface roughness on rotating disks, as well as the highest wear resistance values.

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Effect of Thermoelectric Properties on the Frictional Behavior of High-Speed Steels

Fominov,

Shuchev,

Aliev

et al. 2023

Russ. Engin. Res.

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Estimation of triboelectric properties of high-speed steels

Cited by 3 publications

References 0 publications

Turning Tool Wear Estimation Based on the Calculated Parameter Values of the Thermodynamic Subsystem of the Cutting System

Turning Tool Wear Estimation Based on the Calculated Parameter Values of the Thermodynamic Subsystem of the Cutting System

Tribological Characteristics of Experimental Hard Alloy Grades With Modified Cobalt Binder Under Conditions of Dry Friction on Titanium-Aluminum Alloy Vt-3

Effect of Thermoelectric Properties on the Frictional Behavior of High-Speed Steels

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