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This work was financed from the funds of the Ministry of Education and Science by Agreement No. DNK/SP/513880/2021 of 22 December 2021, the project “14th School of Machining and the 43rd Scientific School of Abrasive Machining”, under the programme “Perfect Science”.
Composite materials are usually subjected to machining processes, especially when they are used to for the avia-
tion and automotive industries. Apart from side surface milling and face milling, these materials are subjected
to machining to make holes and countersinking holes, cuts of complex shape, recesses, and grooves. One of the
many machining methods for polymer composites is drilling. The accuracy of a drilled hole is very important for
operational reasons, because it has impact on the quality and strength of the connection between polymer compos-
ite elements and structural elements. This paper shows the results of a study investigating the impact of drilling
and secondary drilling as well as technological drilling parameters on the maximum feed force, surface roughness
and hole quality. Holes were drilled in glass, carbon and aramid fiber reinforced plastics. The study has shown
that the highest maximum feed force occurs when drilling in aramid fiber reinforced plastic. The lowest values
of the maximum feed force were obtained when drilling in glass fiber reinforced plastic. The influence of drilling
parameters on surface roughness during drilling holes in composite materials was also determined. The highest
values of roughness parameters were obtained in the machining of aramid fiber reinforced plastic, while the lowest
roughness parameters were obtained on the hole surface when drilling in carbon fiber reinforced plastic.
