Water Jet Technology: Experimental Verification of the Input Factors Variation Influence on the Generated Vibration Levels and Frequency Spectra

Olejárová, Štefánia; Krenický, Tibor

doi:10.3390/ma14154281

Cited by 4 publications

(2 citation statements)

References 23 publications

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“…Consequently, spectral analysis of the experimentally obtained signals is mandatory. Additionally, this problem is topical for studying the impact of vibrations in the technology of abrasive water [23][24][25] and determining optimal cutting modes of process systems with variable rigidity [26]. Finally, in chemical engineering, the approach described below can help solve the aeroelasticity problem for separation devices [27] and study the impact of superimposed vibrations on mass transfer processes [28].…”

Section: Introductionmentioning

confidence: 99%

Signal Decomposition for Monitoring Systems of Processes

Pavlenko,

Trojanowska,

Ivanov

et al. 2024

Processes

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This article is devoted to the problem of signal decomposition into periodic and aperiodic components. According to the proposed approach, there is no need to evaluate the aperiodic component as a difference between the total signal of its periodic components. This research aims to create a general analytical approach that combines the Fourier and Maclaurin series methodologies into a single comprehensive series. As a result, analytical expressions for determining deposition coefficients were established for an aperiodic signal with a monoharmonic overlay. Recurrence relations were established to determine the coefficients of this series. These relations allow direct integrations of the obtained values of integrals to be avoided. The evaluated numerical values of the coefficients are also presented graphically and tabulated. It was proven that the values of these coefficients are universal numbers since they do not depend on the period/frequency of oscillations. The reliability of the proposed approach was confirmed by the fact that the evaluated coefficients are equal to the Fourier series coefficients in the case of a periodic signal. Also, for an aperiodic signal, these coefficients were reduced to the coefficients of the Maclaurin series. The usability of the proposed generalized analytical approach for signal decomposition is for control and monitoring systems of processes.

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Section: Introductionmentioning

confidence: 99%

Signal Decomposition for Monitoring Systems of Processes

Pavlenko,

Trojanowska,

Ivanov

et al. 2024

Processes

View full text Add to dashboard Cite

show abstract

“…Similarly, some research focuses on the vibrations of the cut material to monitor the cutting process [ 12 ], specifically on determining the metrology and topography of the surface [ 13 ] or its roughness [ 14 , 15 ]. Other studies aim at researching the relation between vibrations and changing parameters such as the abrasive mass flow rate or the traverse speed [ 16 , 17 ] or the capability of the vibration measurement and analysis to indicate the wear progression of the focusing tube [ 18 ]. Another work focuses on the vibrations of the focusing tube influencing the AWJ cutting capability [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Several Physical Phenomena Measured on the Metallic Materials Cut by Abrasive Water Jets (AWJ)

et al. 2022

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Cutting using an abrasive water jet is a complex process involving several physical phenomena. This research studies some of them, mostly the influence of selected variables on the measured forces and vibrations. The traverse speed represents one of the key parameters when cutting using the AWJ. In the presented research, a set of experiments was performed on twelve different metal samples, while the force sensor measured the exerted forces and accelerometers measured the vibrations. Ten different types of steel samples of the same dimensions were cut applying five different traverse speeds. The data obtained during these measurements show that an increase in the traverse speed leads to an increase in the measured forces and vibrations. An analogous experiment performed on bronze and duralumin samples of the same dimensions, having applied higher speeds to compensate for the difference in the material structure and properties, completes the presented data. The most important results of the research are that exerted forces in the z-axis are higher than those in the x-axis, whereas measured vibrations are higher in the x-axis. According to our research, the elemental structure, especially the carbide formation, affects the measured forces and vibrations substantially.

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An Analysis of Selected Technological Parameters’ Influences on the Tribological Properties of Products Manufactured Using the FFF Technique

et al. 2022

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This study investigates how layer deposition in printing 3D models made of polyetherimide (PEI) using the fused filament fabrication (FFF) technique affects resistance of these models to abrasive wear. Samples made by additive manufacturing with different setting of build orientation and path generation strategy of extruded fibers were used in the experiment. The experiments were conducted on a tribometer according to the ASTM G65-16 standard. The friction force, normal force, and temperature in the contact area during the tribometer operation were measured using a strain gauge sensor. The tribometer allowed us to perform the tribological experiments using a rubber-coated or a metal disc without a lubricant in the so-called “dry” operation. Following the ASTM G65-16 standard, a rubber-coated disc and Fe3Al2 (SiO4)3 garnet abrasive were used for the wear resistance tests. The analysis of experimental data showed correlations among orientation selection, the strategy of layer deposition by the FFF technique, and the surface life in terms of abrasive wear. The results of this research also showed the suitability of the chosen building orientation and deposition strategy for part production by additive manufacturing, depending on the required tribological properties, such as the coefficient of friction (yield path) and wear behavior. Based on the results of the study, it is concluded that continuity of wear and friction force depends on the path traveled under the model production orientation. The size of wear (material loss) ranged from 0.451–0.809%. It was shown that the weight loss of the sample under loading was greater, on average, with the chosen fiber orientation strategy in the Z direction than in the X direction.

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Water Jet Technology: Experimental Verification of the Input Factors Variation Influence on the Generated Vibration Levels and Frequency Spectra

Cited by 4 publications

References 23 publications

Signal Decomposition for Monitoring Systems of Processes

Signal Decomposition for Monitoring Systems of Processes

Analysis of Several Physical Phenomena Measured on the Metallic Materials Cut by Abrasive Water Jets (AWJ)

An Analysis of Selected Technological Parameters’ Influences on the Tribological Properties of Products Manufactured Using the FFF Technique

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