Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
COMPARATIVE STUDY OF FRONT MILLING OF PEEK AND PEEK-CF30
Submission Author:
Carlos Alfredo Gracioli Aita , RS , Brazil
Co-Authors:
Carlos Alfredo Gracioli Aita, Émerson Passari, André João de Souza
Presenter: Carlos Alfredo Gracioli Aita
doi://10.26678/ABCM.COBEM2023.COB2023-1212
Abstract
The thermoplastic poly-ether-ether-ketone (PEEK) is a low-density polymer with high durability, excellent stiffness, good toughness, and high chemical, thermal and mechanical resistances. The addition of carbon fiber enhances the properties of the matrix, resulting in PEEK-CF composites with great potential for industrial applications. Since studies on the milling of PEEK-CF are relatively new, it is necessary to thoroughly understand its machinability, as the properties of this composite vary according to the carbon fiber loading. Therefore, this work aims to perform a preliminary comparative study regarding machining force and surface roughness generated during dry face milling of PEEK and PEEK-CF30 (30% carbon fiber reinforcement). A Box-Behnken experimental design was used to create combinations of cutting parameters (cutting speed, feed per tooth, and depth of cut), and the analysis of variance was employed to investigate the influence of these parameters on the machining of both materials. The results showed that, within the analyzed parameter range, milling of PEEK-CF30 generated average roughness values 34.8% lower and machining force values 34.9% higher than PEEK due to the carbon fiber reinforcement. In PEEK, the feed per tooth was the parameter that most contributed to the roughness and force magnitudes, while in PEEK-CF30, depth of cut and cutting speed were more significant for surface roughness, and feed per tooth for machining force.
Keywords
peek, Carbon fibre composites, Front milling, Avarege surface roughness, Machining force
