Currently, emphasis is placed on the quality of production in connection with its efficiency. The emphasis is mainly on machining processes in which the material removal rate is low. These machining processes include wire electrical discharge machining (WEDM). This is a technology that allows material removal using cyclically repeated electrical discharges. It is characterized by high production quality, but low productivity and process efficiency. This is due to the very nature of the electrical discharge process in conjunction with inappropriate settings of the main technological parameters. Therefore, their optimal setting is important to achieve favourable efficiency of the machining process. Moreover, low material removal rate is a particular problem of WEDM technology when machining sintered carbides. This is because these materials exhibit a greater degree of inhomogeneity of the structure and a significant reduction in material removal rate associated with it. The aim of the experimental research was therefore to analyse the mechanisms and interdependence of the quality of the machined surface in terms of roughness parameters and material removal rate in WEDM of tungsten carbide with Co binder. In addition, through graphical optimization, to define the qualitative area in which favourable values of the eroded surface roughness parameters Ra and Rz and at the same time a sufficiently high material removal rate is achieved.
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