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@article{64181, author = {Gavlas, Martin and Kaco, Michal and Dekýš, Vladimir and Špiriak, Miroslav and Slabejová, Silvia and Czán, Andrej and Holubjak, Jozef and Kušnerová, Milena and Harničárová, Marta and Valíček, Jan}, article_location = {Basel, Switzerland}, article_number = {15/2022}, keywords = {centerless grinding; vibrodiagnostics; analysis of the run-up and run-down; boxplot; spectral analysis; STFT; geometric deviation}, language = {eng}, issn = {1996-1944}, journal = {Materials}, title = {Research on the Oscillation in Centerless Grinding Technology When Machining Bearing Steel}, url = {https://www.mdpi.com/1996-1944/15/14/4968}, volume = {neuveden}, year = {2022} }
TY - JOUR ID - 64181 AU - Gavlas, Martin - Kaco, Michal - Dekýš, Vladimir - Špiriak, Miroslav - Slabejová, Silvia - Czán, Andrej - Holubjak, Jozef - Kušnerová, Milena - Harničárová, Marta - Valíček, Jan PY - 2022 TI - Research on the Oscillation in Centerless Grinding Technology When Machining Bearing Steel JF - Materials VL - neuveden IS - 15/2022 SP - nestránkováno EP - nestránkováno PB - MDPI SN - 19961944 KW - centerless grinding KW - vibrodiagnostics KW - analysis of the run-up and run-down KW - boxplot KW - spectral analysis KW - STFT KW - geometric deviation UR - https://www.mdpi.com/1996-1944/15/14/4968 N2 - In today’s engineering industry, technical diagnostics presents many advantages for improving the management of machining centers and automated production lines. As the fourth industrial revolution is currently being implemented, which includes machine diagnostics, the idea of adding information from the field of vibrodiagnostics was born. The vibration of the workpiece or machine tool negatively affects the geometric parameters of the machined surfaces of the workpiece. Through vibrodiagnostics, the influence of cutting parameters on the oscillation of a bearing steel workpiece during centerless grinding is investigated. The presented publication deals with the vibration of the mechanical parts of a centerless grinding machine. The oscillations are recorded by acceleration sensors, which are also placed on the support ruler in which the workpieces are guided, and the recorded data are input parameters for statistical processing of acceleration values in the form of statistical characteristics (minimum, lower quartile, median, upper quartile, maximum). In this paper, this procedure was applied for the selection of the optimum cutting parameters (for the speed of the support wheel), where the machining parameters at which the minimum oscillation values occur were selected based on the above-mentioned statistical characteristics. This optimization procedure revealed increased vibration values which reached the highest amplitude on the ruler, namely accelerations of 11 m/s2 , the origin of which was subsequently detected by STFT because the occurrence of resonance events or the excitation of natural frequencies of the machine were suspected. The STFT analysis identified a resonant region at machine start-up determined by the spindle speed which excites the resonance on the machine. The speed range between 1950 and 2150 rpm, which corresponds to the built-up resonance, was provided to the technologists to ensure that the machinebwas not operated around this resonance region at 400 and 760 Hz until the undesired phenomenon was eliminated. The results of the individual measurements provided information on the ideal setting of the cutting parameters and the current state of the machine. ER -
GAVLAS, Martin, Michal KACO, Vladimir DEKÝŠ, Miroslav ŠPIRIAK, Silvia SLABEJOVÁ, Andrej CZÁN, Jozef HOLUBJAK, Milena KUŠNEROVÁ, Marta HARNIČÁROVÁ a Jan VALÍČEK. Research on the Oscillation in Centerless Grinding Technology When Machining Bearing Steel. \textit{Materials}. Basel, Switzerland: MDPI, neuveden, 15/2022, s.~nestránkováno, 14 s. ISSN~1996-1944. 2022.
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