New tool for reduction of harmful particulate dispersion and to improve machining quality when trimming carbon/epoxy composites

N. Nguyen-Dinh (1) , Akshay Hejjaji (1) , Redouane Zitoune (1) , Christophe Bouvet (1) , Mehdi Salem (1)

1 ICA - Institut Clément Ader

Conventional machining of carbon fiber reinforced plastic composites (CFRPs) generates minute chips that get suspended in air causing a hazard compromising operator safety. This study investigates the influence of cutting parameters (feed speed, cutting speed, radial depth of cut, tool geometry and tool wear) during trimming of CFRP on the form and quantity of harmful particles dispersed. Also, performance of two classical PCD tool geometries (two straight flutes, two helix flutes) have been compared with newly designed (in collaboration with ASAHI Company) four serrated straight flutes for the purpose of dust emission reduction. The quantification of the number of harmful particles was estimated using laser spectroscopic dust monitor. The results reveal that, trimming with a combination of higher feed speed and lower cutting speed can reduce the dispersion of harmful particles. Further, the four serrated straight flutes recorded the least number of harmful particles compared to the conventional tools.

Mots clés: Air contamination; Respiratory hazard; Dust dispersion; Electron microscopy; Polymer-matrix composites (PMCs); Defects

Domaines: Génie mécanique [physics.class-ph]

N. Nguyen-Dinh, Akshay Hejjaji, Redouane Zitoune, Christophe Bouvet, Mehdi Salem. New tool for reduction of harmful particulate dispersion and to improve machining quality when trimming carbon/epoxy composites. Composites Part A: Applied Science and Manufacturing, 2020, 131, pp.105806. ⟨10.1016/j.compositesa.2020.105806⟩. ⟨hal-02544160⟩