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This article presents the results of a study
investigating feed forces in milling processes for glass and
carbon fiber-reinforced plastics. The forces are measured in
both conventional and climb milling. The novelty of this article
is use the feed forces values as signals for recurrence analysis.
Recurrence quantifications obtained in different types of milling
for the two different composite materials are plotted. 3D surface
topography maps after conventional and climb milling are also
presented. The results show that the use of climb milling
produces lower feed force values for both types of composite
materials. The milling of composites with glass fibers results in
lower feed force values and better surface quality. Increased
feed per revolution and cutting speed (in range 50-300 m/min)
results in higher feed force values. It is also shown that the
recurrence quantifications such as determinism (DET), entropy
(ENT), laminarity (LAM), trapping time (TT), recurrence time
of 1st type (T1), and clustering coefficient (CC) depend on the
type of machining, composite material and technological
parameters. The work extends the existing research in the use of
recurrence methods, because the current research only
concerned conventional milling.
