Analysis of cut orientation through half-finished product using WEDM

Mouralová, Kateřina; Beneš, Libor; Zahradníček, Radim; Bednár, J; Hrabec, Pavel; Prokeš, Tomáš; Hrdý, Radim

doi:10.1080/10426914.2018.1544714

Cited by 18 publications

(15 citation statements)

References 21 publications

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“…In addition, there were a number of small craters up to 5 µm in diameter on the surfaces, which were probably formed as individual bubbles produced during the erosion process. The microstructure of the material in the form of dots is also noticeable in some places, which has also been studied in Inconel 625 [20]. The analysis of the chemical composition in the selected area of 200 × 200 µm, the resulting spectrum of which is shown in Figure 6b showed low contamination with a tool electrode element, zinc, which increased from 4 wt.% to 5.7 wt.%.…”

Section: The Analysis Of Surface and Subsurface Areamentioning

confidence: 82%

“…The morphology of all machined samples within the design of the experiment was similar, with no significant differences depending on the machine parameter settings. All samples were relatively smooth, as shown in Figure 6 with not very significant individual craters, as was the case with Inconel 625 [20]. On the surface of all samples, there were several small cracks, which were subsequently studied in a cross-section of the samples to determine their influence on the service life and correct functionality of the machined parts.…”

Section: The Analysis Of Surface and Subsurface Areamentioning

confidence: 91%

“…A 10 mm prism semi-product was used for the experiment, with samples, microstructure and chemical composition analysis (EDX, Lyra 3, Tescan, Brno, Czech Republic) of the semi-product shown in Figure 1. on the effect of heat treatment on the occurrence of defects [11,19], the effect of section orientation by a semi-product [11,20] and the effect of the material used [21].…”

Section: Experimental Materialsmentioning

confidence: 99%

“…WEDM technology is very difficult to optimize due to a large number of parameters entering the machining process, and the optimization is usually aimed at maximizing the cutting speed and the quality of the machined surface. Considering the number of input factors affecting the speed of cutting and the quality of the surface and subsurface layers, extensive research has been carried out on the effect of heat treatment on the occurrence of defects [11,19], the effect of section orientation by a semi-product [11,20] and the effect of the material used [21].…”

Section: Introductionmentioning

confidence: 99%

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Analysis of the Machinability of Copper Alloy Ampcoloy by WEDM

et al. 2020

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The unconventional technology of wire electrical discharge machining is widely used in all areas of industry. For this reason, there is always an effort for efficient machining at the lowest possible cost. For this purpose, the following comprehensive study has been carried out to optimize the machining of the copper alloy Ampcoloy 35, which is particularly useful in plastic injection moulds. Within the study, a half-factor experiment of 25-1 with 10 axial points and seven central points of a total of 33 rounds was carried out, which was focused on the response monitoring of the input factors in the form of the machine parameters setup: gap voltage, pulse on time, pulse off time, discharge current, and wire speed. Based on the study of the response in the form of cutting speed and surface topography, their statistical models were created, while the optimal setting of machine parameters was determined to maximize the cutting speed and minimize the topography parameters. Further, a detailed cross-sectional analysis of surface and subsurface layer morphology was performed using electron microscopy including chemical composition analysis. In order to study microstructural changes in the material at the atomic level, a lamella was created, which was then studied using a transmission electron microscope.

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Section: The Analysis Of Surface and Subsurface Areamentioning

confidence: 82%

Section: The Analysis Of Surface and Subsurface Areamentioning

confidence: 91%

Section: Experimental Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Analysis of the Machinability of Copper Alloy Ampcoloy by WEDM

et al. 2020

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“…This morphology is created by a large number of individual craters formed by the debris of small particles of material that were subsequently washed away by a dielectric fluid stream. However, the appearance of individual morphologies is different and is influenced not only by the set of mechanical and physical properties of the machined material [22], including the type of the heat treatment, but also by the direction of the cut of the semi−product [23] and, last but not least, by the setup of the machine parameters [15]. On the surface of the machined samples, due to the effects of very high temperatures, a recast layer is formed, which represents a layer of completely molten and re−cooled material.…”

Section: Analysis Of the Machined Surface And Discussionmentioning

confidence: 99%

The Influence of WEDM Parameters Setup on the Occurrence of Defects When Machining Hardox 400 Steel

et al. 2019

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The unconventional technology wire electrical discharge machining is a highly used technology for producing precise and indented shaped parts of all materials that are at least electrically conductive. Its wide use makes this technology applicable in almost all branches of industry, even in the automotive industry, where the abrasion resistant material under investigation Hardox 400 steel is widely used for the manufacturing of truck bodies. The aim of this study was a comprehensive analysis of the machinability of this material using WEDM employing a 33−round experiment. Based on the change in machine parameters (pulse off time, gap voltage, discharge current, pulse on time, and wire feed), the cutting speed, the topography of machined surfaces, and the chemical composition of the workpiece surface, the morphology and condition of the subsurface layer including lamella production and a subsequent determination of the distribution of individual elements in the given area were analyzed. It has been found that during the machining of this steel, many defects occur in the subsurface layer of the material in the form of cracks with a depth of up to 22 µm and burned cavities. However, by appropriately adjusting the machine parameters, it was possible to completely remove these cracks.

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Analysis of the machinability of different types of sintered carbides with WEDM in both water and oil baths

Mouralová

Beneš

Prokeš

et al. 2023

Int J Adv Manuf Technol

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The unconventional Wire Electric Discharge Machining (WEDM) technology represents a vital manufacturing technology in different industrial branches. This technology is essential because of the possibility to machine di cult-to-machine materials such as sintered carbides. For this reason, this study analyses the machinability of sintered carbides WKP23S, WSM33S a WK1 with WEDM in both water and oil baths. We investigated the in uence of the machining parameters, namely, pulse off time, gap voltage, discharge current, pulse on time, and wire feed, on the cutting speed, surface roughness, and defect occurrence. We investigated 9 different roughness parameters, analysed surface morphology with an electron microscope, and also analysed cross-sectioned samples. We found out that machining sintered carbides in oil bath yields better results than machining in deionized water. The oil tank prevents the removal of the cobalt binder, but it doesn't reduce ssure occurrence in any signi cant way.

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Analysis of cut orientation through half-finished product using WEDM

Cited by 18 publications

References 21 publications

Analysis of the Machinability of Copper Alloy Ampcoloy by WEDM

Analysis of the Machinability of Copper Alloy Ampcoloy by WEDM

The Influence of WEDM Parameters Setup on the Occurrence of Defects When Machining Hardox 400 Steel

Analysis of the machinability of different types of sintered carbides with WEDM in both water and oil baths

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