Influence of electrical parameters in electro discharge machining of tungsten heavy alloys on surface texture properties

• Main Authors: Gulbinowicz, Zbigniew, Świercz, Rafał, Oniszczuk-Świercz, Dorota
• Format: Conference Proceeding
• Language: English
• Subjects: Design of experiments; EDM electrodes; Machining; Process parameters; Properties (attributes); Surface layers; Surface roughness; Texture; Tungsten base alloys
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/1.5056270

Electro discharge machining (EDM) is a precision method of manufacturing complex shape difficult to machining materials. In EDM material is removed from the workpiece with a series of discharges occurring in the gap between two electrodes. Specific properties of surface texture are the result of the thermal removal process. This paper presents the results of experimental investigation of the influence of EDM process parameters: discharge current and the pulse time on tungsten heavy alloys surface texture properties. Experimental investigations of the EDM process were carried out on a Charmilles Form 2LC ZNC machine. Manufacturing samples had the dimensions of 10 × 10 × 3 mm, the electrode was a cooper and commercial EDM fluid 108 MP-SE 60 was used as the dielectric. Investigation of the surface roughness was undertaken on a Taylor-Hobson FORM TALYSURF Series 2 scan profilometer. To characterize the surface texture after the EDM, the following 3D parameter surface roughness was used: arithmetic mean of the deviations from the mean Sa, the density of the top Sds. The experimental investigation was carried out with a design of experiment methodology three level two parameters.