Analysis of the pulsating properties of a high-pressure water jet generated in a self-excited head for erosion processing

Szada-Borzyszkowska, Monika; Kacalak, Wojciech; Banaszek, Kamil; Borkowski, Przemysław J.; Szada-Borzyszkowski, Wiesław

doi:10.1007/s43452-023-00769-6

Cited by 10 publications

(5 citation statements)

References 23 publications

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“…26b). The results of this research are in line with previous studies on concrete processing [40, 41] conducted using PWJ, generated by hydrodynamic method [42,43,44].…”

Section: Experimental Testssupporting

confidence: 90%

Assessment of the effectiveness of high-pressure water jet machining generated using self-excited pulsating heads

Szada-Borzyszkowska,

Kacalak,

Banaszek

et al. 2024

Preprint

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The article provides a analysis of pulsating water jets, utilizing three distinct head models. It research the impact of tool geometry on water velocity and pressure scientifically. The emergence of vortices due to increased flow through additional holes is identified as the primary cause of the observed pulsations. Laboratory tests contributed measured impulses at various pressures, revealing a direct correlation between longer impulses (ranging from 15 mm to 60 mm) and increased erosion potential. Notably, at 35 MPa, longer impulses exhibited a minor decrease in force deviation by 0.068. Additionally, the research indicates that pressure variations affect impulse frequencies: 0.55 ms at 15 MPa and approximately 1 ms at higher pressures, highlighting the dynamic nature of water streams based on applied pressures. The study emphasizes the exploitable aspects of self-excited pulsating heads, meticulously examining their design, parameter variations, and their impact on impulse generation. Such comprehensive research serves as a fundamental for enhancing the efficiency of surface pulsating water jet.

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“…26b). The results of this research are in line with previous studies on concrete processing [40, 41] conducted using PWJ, generated by hydrodynamic method [42,43,44].…”

Section: Experimental Testssupporting

confidence: 90%

Assessment of the effectiveness of high-pressure water jet machining generated using self-excited pulsating heads

Szada-Borzyszkowska,

Kacalak,

Banaszek

et al. 2024

Preprint

Self Cite

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“…The results obtained indicate that even slight wear of cutting tools can result in the formation of burrs, deformation zones, and the welding of sheet metal stacks [34,35]. Cutting sheet metal bundles using the AWJ method with appropriate pressure in the stack ensures that plastic deformations inside the material are limited and that conditions conducive to the formation of burrs and built-up edges are avoided [36]. As a result, the quality of the cut edges of stacked sheets is much higher compared to that of multi-layer blanking [37].…”

Section: Resultsmentioning

confidence: 98%

Analysis and Basics of Improving the Process of Cutting Electrical Sheet Bundles with a High-Pressure Abrasive Water Jet

Szada-Borzyszkowska,

Kacalak,

Bohdal

et al. 2024

Materials

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Electrical steels are widely used in the electrical industry in the construction of many devices, e.g., power transformer cores and distribution transformers. An important parameter of electrical components that determines the efficiency of devices is energy loss during remagnetization. These losses are influenced, among other factors, by steel cutting processes. The common techniques for cutting electrical materials on industrial lines are mechanical cutting and laser cutting. High-pressure abrasive water jet (AWJ) cutting, unlike the technologies mentioned above, can ensure higher quality of the cut edge and limit the negative impact of the cutting process on the magnetic properties of sheet metal. However, the correct control of the process and the conditions of its implementation comprise a complex issue and require extensive scientific research. This work presents a new approach to cutting electric sheets, involving bundle cutting, which significantly increases the processing efficiency and the dimensional and shape accuracy of the cut details. The tests were carried out for bundles composed of a maximum of 30 sheets, ready to be joined in a stator and rotor in a motor. The influence of processing conditions on the quality of the cut edges of sheet metal, the width of the deformation zone, and the burr height were analyzed. The detailed analysis of the quality of the cut edges of electrical bundled sheets creates new possibilities for controlling the AWJ cutting process in order to obtain a product with the desired functional and operational properties.

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“…Loose abrasive in the cutting zone, where high forces prevail, can cause many problems. This phenomenon is utilized in water jet machining, where loose abrasive is ejected into the medium under high pressure, or sometimes the pressure of the medium alone is sufficient to induce erosive action on the surface [31]. Additionally, chipping of grain peaks was observed (see Figure 6g) along with the clogging of the cutting edge with work material (see Figure 6f).…”

Section: Research On Microchips Lapping Film Finishing Productsmentioning

confidence: 99%

Morphology of Microchips in the Surface Finishing Process Utilizing Abrasive Films

Tandecka,

Kacalak,

Wiliński

et al. 2024

Materials

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In this study, the surface of new lapping films was analyzed, and the lapping finishing process was applied to RG7 tin bronze alloy. The research focused on examining lapping films with electrocorundum grains of nominal sizes 30, 12, and 9 μm, commonly used for achieving smooth surfaces. The manufacturing process involves placing abrasive grains and binder onto a polyester tape, resulting in a heterogeneous distribution of abrasive grains. The study investigates the impact of this random distribution on the performance of lapping films during material removal. Scanning electron microscopy was used to analyze the surface structure of abrasive films, revealing distinctive structures formed by the specific aggregation of abrasive grains. This study explores the influence of different nominal grain sizes on surface finish and aims to optimize lapping processes for diverse applications. The research also delves into microchip analysis, examining the products of the lapping film finishing process. Microchips were observed directly on the abrasive tool surface, revealing insights into their morphology and distribution. The chip segmentation frequency was determined, and they amounted to approximately 0.8 to 3 MHz; these are very high frequencies, which are unique for known chip-forming processes.

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Analysis of the pulsating properties of a high-pressure water jet generated in a self-excited head for erosion processing

Cited by 10 publications

References 23 publications

Assessment of the effectiveness of high-pressure water jet machining generated using self-excited pulsating heads

Assessment of the effectiveness of high-pressure water jet machining generated using self-excited pulsating heads

Analysis and Basics of Improving the Process of Cutting Electrical Sheet Bundles with a High-Pressure Abrasive Water Jet

Morphology of Microchips in the Surface Finishing Process Utilizing Abrasive Films

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