WEDM single crater asymmetry

Abstract In wire electrical discharge machining (WEDM), the erosion is made through a series of overlapped craters. The shape these craters has relevant impact on characteristics machined surface, from surface roughness to heat effects during spark. Current models EDM process do not represent specific WEDM characteristics, such as radial asymmetry crater or geometrical shape. order characterize crater’s dimensions in WEDM, single experiments are performed polished steel for pulses with different energy levels. A 3D optical microscope used map craters’ topographies (experimental work). To capture dimensions, an ellipsoidal equation applied Levenberg–Marquardt algorithm. capable identifying along length, perpendicular and depth crater. ratio between dimension define aspect characterizes its elongation. found be dependent pulse energy. Low-energy create rounder craters, while high-energy form elongated that longer length. Such behavior suggests formation constricted by geometry, having preferential direction growth,