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Analysis of the Deburring Efficiency of EN-AW 7075 Aluminum Alloy Parts with Complex Geometric Shapes Considering the Tool Path Strategy During Multi-Axis Brushing
The research leading to these results has received funding from the commissioned task
entitled “VIA CARPATIA Universities of Technology Network named after the President of the
Republic of Poland Lech Kaczy ´nski” under the special purpose grant from the Minister of Education
and Science, contract no. MEiN/2022/DPI/2575, as part of the action “In the neighborhood—inter-
university research internships and study visits”.
The paper presents the results of an analysis of the effect of brushing on the edge condition
of workpieces with complex geometric shapes, formed during milling, on a five-axis DMU 100
monoBLOCK machining center. A set of EN-AW 7075 aluminum alloy specimens with curvilinear
edges requiring multi-axis machining was prepared. The change of edge condition after the milling
process was realized using Xebec tools with flexible ceramic fibers. The effects of brush fiber type
and parameters related to tool design were analyzed. Different brushing strategies were employed
on the five-axis machining center. It was shown that, for curvilinear edges, there were different
effects for concave and convex edges depending on the employed tool strategy, including the type
of tool, its configuration, and its orientation towards the workpiece. For a lead angle of β = 0◦,
the machined edge was characterized by variable chamfer widths, in spite of maintaining other
machining parameters constant. The use of a lead angle β > 0 produced a stable edge with repeatable
characteristics. The range of fiber interaction increased with increasing the lead angle and fiber
working length.
