Experimental INVESTIGATION OF influence WEDM PARAMETERS ON SURFACE ROUGHNESS AND FLATNESS DEVIATION

Oniszczuk-Świercz, Dorota; Świercz, Rafał; Chmielewski, Tomasz; Sałaciński, Tadeusz

doi:10.37904/metal.2020.3567

Cited by 10 publications

(8 citation statements)

References 11 publications

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“…First, these geometric deviations depend on the limit values of the accuracy of the hardware and software guidance of the wire electrode and the workpiece. This was also confirmed by Oniszczuk-Swiercz [19]. Other factors entering the process, which result in undesired geometric form deviations, are the properties of the wire electrode and those of the workpiece material.…”

Section: Geometric Accuracy and Surface Roughness In Electrical Discharge Machiningsupporting

confidence: 54%

Adjustment of Wire Vibrations in Order to Improve Geometric Accuracy and Surface Roughness at WEDM

Straka

Čorný

2021

Applied Sciences

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Although WEDM is one of the most precise finishing technologies, deviations from the required geometric shapes and surface roughness occur in the production of parts with rotary surfaces. Even though these shortcomings have only a minimal impact on planar cuts, the production of circular profiles is a different problem. One of the factors causing this poor quality is the vibration of the wire electrode. With appropriate vibration adjustment, it would be possible to achieve significant improvements of the eroded area quality, both in terms of geometric accuracy and in terms of surface roughness. This would significantly increase quality, enabling WEDM technology to compete with other technologies in terms of economic efficiency. Therefore, the proposed solution aims to provide a partial adjustment to the wire tool electrode vibrations, based on their sensing by the means of acoustic emissions or a laser beam, with subsequent dynamic adjustment of the actual technological parameter values. This way, the given solution will increase the production accuracy of circular holes, increase productivity, and ultimately provide an overall increase in the economic efficiency of the WEDM process. The article also presents the scheme of a control algorithm for monitoring and subsequent adjustments of the vibrations of the wire tool electrode during the electroerosion process in order to minimize geometric deviations of circularity, cylindricity and roughness of the machined surface.

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Section: Geometric Accuracy and Surface Roughness In Electrical Discharge Machiningsupporting

confidence: 54%

Adjustment of Wire Vibrations in Order to Improve Geometric Accuracy and Surface Roughness at WEDM

Straka

Čorný

2021

Applied Sciences

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“…In the case of materials with low machinability, unconventional machining processes are used in order to improve their quality. One of the technologies that are suitable for processing this kind of materials and simultaneously allow to obtain sufficiently low roughness of the treated surface (Ra up to 1.0 µm for aluminum, 0.8 µm for brass, 0.7 µm for alloy steels [25]) is electrical discharge machining (EDM) [26,27]. Due to the high geometrical complexity of processed elements, a special type of EDM process, which is wire electrical discharge machining (WEDM), is sometimes used [28].…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study on the Structure and Quality of SLM and Cast AISI 316L Samples Subjected to WEDM Processing

et al. 2022

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Additive manufacturing technologies are increasingly used in the production of semi-finished workpieces intended for further processing. This entails the need to investigate the machinability and final properties of such products. Comparative research on wire electrical discharge machining (WEDM) processes performed with two kinds of AISI 316L stainless steel workpieces is presented in this paper. The first workpiece was made by selective laser melting (SLM), while the second one was casting. Both working materials were cut with current values ranging from 8 to 72 amps. A comparison of roughness, structure and chemical composition of machined surfaces was performed between the two kinds of specimens. For the SLM sample, parameters of the cutting process that provide relatively low surface roughness (Ra ≤ 10 µm) with the simultaneous maximization of the process efficiency were determined. It was found that in the case of applying high current values (72 amp.), more favorable properties of the treated surface were obtained for the SLM sample than for the cast one.

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“…Using a working electrode with dimensions less than / equal to 0.1 mm allows for the production of microelements. In WEDM electric discharges occur between the wire electrode and the workpiece, causing the material to be locally removed by melting and evaporation, as a result of the impact of thermal processes from discharge [1][2][3][4][5][6]. On the surface of the workpiece and the working electrode, craters are formed (Figure 1).…”

Section: Introductionmentioning

confidence: 99%

Analysis of surface topography after micro-wire electrical discharge machining of nickel-based superalloy

Oniszczuk-Świercz

Świercz

REMPALSKA

et al. 2022

METAL 2022 Conference Proeedings

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Micro-mechanisms are one of the main areas of development in manufacturing technology widely used in various production fields. Currently, new microelements are made of superalloys due to the high requirements of corrosion resistance and temperature resistance. Furthermore, effective methods of making micro elements are sought, which on the one hand will ensure the appropriate dimensional and shape accuracy and, on the other hand, the expected surface quality. Conducted research was focused on analyzing the influence of micro wire electrical discharge machining on the parameters of selected surface topography features, which directly impact the tribological properties of the surface of micro parts. The effect of the WEDM parameters on the functional parameters of the surface texture: Sk -the roughness of the core, Spk -the roughness of the peak, Svk -the roughness of the valleys are presented and discussed.

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Experimental INVESTIGATION OF influence WEDM PARAMETERS ON SURFACE ROUGHNESS AND FLATNESS DEVIATION

Cited by 10 publications

References 11 publications

Adjustment of Wire Vibrations in Order to Improve Geometric Accuracy and Surface Roughness at WEDM

Adjustment of Wire Vibrations in Order to Improve Geometric Accuracy and Surface Roughness at WEDM

A Comparative Study on the Structure and Quality of SLM and Cast AISI 316L Samples Subjected to WEDM Processing

Analysis of surface topography after micro-wire electrical discharge machining of nickel-based superalloy

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