Revealing patterns in the wear of profile diamond wheels

Strelchuk, Roman; Trokhymchuk, Sergii; Sofronova, Marina; Osipova, Tatiana

doi:10.15587/1729-4061.2020.203685

Cited by 3 publications

(2 citation statements)

References 9 publications

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“…As the gap increases or decreases, the volume of holes decreases. Therefore, when working with the interelectrode gap, it is necessary to take into account the effect of the discharge on the bundle -the necessary removal shall be provided, and to reduce the effect of electroerosive processes on the treated surface, where the requirements for the quality of processing can be a limiting factor [7].…”

Section: Introductionmentioning

confidence: 99%

Research of the dependence of geometric parameters of holes on electroerosive grinding modes with a changing polarity of electrodes

Strelchuk

Shelkovyi

Gutsalenko

et al. 2022

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

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In this paper are presented the results of electrical discharge diamond grinding with with difference polarities for processing various materials and calculates geometric parameters of erosion holes. The purpose of the study is to determine the volume of holes during electrical discharge diamond grinding using the mathematical method of planning experiments. The experimental plans is a combination of statistical theory and mathematical model, which is very useful in the modelling and analysing the technical problems. As a result of experimental studies, a mathematical model of the volume of holes from electrical modes of the process of electrical discharge diamond grinding was built. The mathematical formula of geometric parameters of holes obtained can be used to determine the volume of holes for different electrical quantities of discharge diamond grinding. It is found that the most significant factors that affect the geometric parameters of holes are the voltage of the igniting pulse and the pulse duration. The dependence of electrical parameters on the hybrid grinding process is investigated. There is a certain volume of holes, at which the discharge acts most efficiently, and the process performance is the most optimal. During the operation of the pulse generator, it is preferable to maintain a certain value of geometric parameters of holes, which results in an unhindered release of metal, since the effect of electrical erosion increases.

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Section: Introductionmentioning

confidence: 99%

Research of the dependence of geometric parameters of holes on electroerosive grinding modes with a changing polarity of electrodes

Strelchuk

Shelkovyi

Gutsalenko

et al. 2022

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

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“…The peculiarity of the process of ED grinding with changing the polarity of the electrodes is that the working gap between the conductive surfaces − the tool and the workpiece − remains practically constant during processing [4]. Therefore, the working surface state of the diamond wheel has not been studied.…”

Section: Introductionmentioning

confidence: 99%

Determination of the Distance Between Grains During Electrical Discharge Grinding with Changing Polarity of Electrodes

Strelchuk

Shelkovyi

2021

Lecture Notes in Mechanical Engineering

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The paper investigates the process of electroerosive diamond grinding by changing the polarity of electrodes in time in the cutting zone for processing various materials, and the distance between the grains is determined. The study aims to determine the effect on the distance between the grains of the electrical modes of electrical discharge grinding (ED grinding) and the characteristics of the wheel using the mathematical method of planning experiments. The planning of the experiment gave the result with the smallest error and made it possible to minimize the number of experiments. As a result of experimental studies, a mathematical model of the distance between grains has been constructed. This model considers the electrical process modes and the wheel characteristics. For various values of electrical modes and the wheel characteristics, using the functional dependence, it is possible to determine the distance between the grains. It was found that the most significant factors that affect the distance between grains are the frequency and relative pulse duration, grain size, and concentration of diamond wheels. The study results obtained allow using the functional dependence to calculate the grinding process's productivity, assess the cutting ability, and simulate the wear of the wheels without lengthy and expensive experimental studies.

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Mathematical modeling of the surface roughness of the grinding wheel during straightening

Strelchuk¹,

Trokhimchuk²

2021

Nauk. visn. nat. hirn. univ.

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Purpose. Research on the mechanism of influence of the straightening conditions of the grinding wheel, including the relative oscillations of the wheel and a multipoint diamond dresser, on the roughness of the ground surface and other machining results. Methodology. Straightening a grinding wheel with a multipoint diamond dresser is a process of high-speed destruction of a hard, abrasive material and its bond under the instantaneous forces, abrasive grains with a hard surface of a diamond crystal. During the grinding wheel straightening, the total component of normal forces causes correspondingly less elastic deformations in the wheel straightening tool system, which increases the accuracy of the geometric shape of the grinding wheel working surface. Findings. The research results make it possible to determine the parameters of the surface roughness of a workpiece and to find ways to control it to increase the efficiency of the grinding process. Originality. The regularities of the influence of the grinding wheel straightening conditions on the state of its working surface have been established. The paper shows that the initial arrangement of grains along the normal to the surface of the wheel is determined by its characteristics. When the abrasive grains hit the surface of the straightening tool, some of the vertices are chipped off, as a result of which the density of the grain vertices on the outer surface of the wheel increases. The straightening process was further developed in the direction of the non-uniform character of the location of the vertices of abrasive grains. The distribution of the grain position at the wheel bond depends on the straightening conditions. Since the removal of the allowance in the process of grinding is carried out by the most protruding grain vertices, then, consequently, the result of grinding will depend on their location and the conditions for the wheel straightening. Practical value. Application of the research results obtained in the work, namely, mathematical modeling of the surface roughness of the grinding wheel during straightening, makes it possible to calculate the roughness parameter of the ground surface. The work also shows that the level of chipping of the grain vertices depends on the grinding wheel straightening conditions, in particular, on the value of the axial feed of the straightening tool. In this case, lower stresses arise in the grains and the bond, and the tool works as a harder one. Straightening conditions affect the stability of the grinding wheel and its self-sharpening process in the machining zone. This determines the significant role of straightening in the results of the grinding process.

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Revealing patterns in the wear of profile diamond wheels

Cited by 3 publications

References 9 publications

Research of the dependence of geometric parameters of holes on electroerosive grinding modes with a changing polarity of electrodes

Research of the dependence of geometric parameters of holes on electroerosive grinding modes with a changing polarity of electrodes

Determination of the Distance Between Grains During Electrical Discharge Grinding with Changing Polarity of Electrodes

Mathematical modeling of the surface roughness of the grinding wheel during straightening

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