|
A study of surface topography can provide valuable information on the product. Since the material finishing
relies on the measured topography, the manufacturing process can be controlled by studying the roughness. The
Laser Power Bed Fusion (LPBF) materials belong to the commonly used surfaces in the industry. Measuring this
type of material with a contactless method can be found in many practical implementations. The white light
interference method can be classified as one of the most encouraging surface topography measurement tech-
niques in the last decade. Due to its fast application and data collection, it can be proposed for many demanding
production processes. However, this measuring method is fraught with many errors, some caused by external
environmental disturbances. One of them is a vibration, which can cause the occurrence of high-frequency
measurement noise. This vibrational measuring noise can influence the ISO 25178 surface texture parameters
significantly. It was found that the high-frequency noise distorted some surface topography parameters more
than 100 %. In this study, the methodology of reduction of vibrational surface topography measurement noise
was proposed using general functions and digital filters. Advantages of application of the proposed method
against standardized, generally proposed S–filter were indicated. Finally, the new methodology was validated in
terms of ISO 25178 surface texture parameters evaluation.
|