Resolving problems of finding surface boundaries during laser machining

Abstract

During machining of aluminum alloy materials, it is possible to find three surface types which can be distinguished as primary, secondary and tertiary sections. In practice this is a big problem in case of necessity to find the basic parameters of roughness and waviness as described by ISO 4288. According to our research, it is possible to use optical microscopy in the first step and subsequently scan the surface in 3D in order to distinguish the surface type. Another problem is how to determine the boundaries between the individual structures. The article describes methods of distinguishing the boundaries in a more precise way by the cumulative functions, leading to more accurate determination of the surface quality parameters. © 2016 Trans Tech Publications, Switzerland.