关键词: 微细电火花线切割, 表面微观形貌, 混合参数, 高斯曲率

Abstract:

Micro-WEDM surface of microscopic three-dimensional morphology with the traditional cutting of the surface is completely different; the surface morphology with a single mechanical cutting surface is entirely different. It belongs to isotropy surface, the measurement directions have great effects on hybrid parameter when it carries on the 3D assessment of surface roughness. The improper choice of measurement directions will make the hybrid parameter with a lower calculation precision, or even the calculation opposes the actual observation for measured surface. This paper used Gaussian curvature characterization concave-convex quality of micro-WEDM surface convex peak
according to the characteristics of micro-WEDM surface convex peak, and eliminated the interference of measurement directions on calculation results. The experimental results indicate that Gaussian curvature characterization concave-convex quality of micro-WEDM surface convex peak achieves high computational precision, and the results are reliable accurately.

Key words: micro wire electrical discharge machining(micro-WEDM), surface micro-topography, hybrid parameter, Gaussian curvature