Research on the Durability of Tools and the Burrs of Workpiece When Milling T700 Carbon Fibre-reinforced Polymer Composites

Abstract

This research aimed to analyse the life and the wear of the coated tools with a diamond thin film, the uncoated cemented carbide tools, and the quality of machined surface, respectively, when milling T700 carbon fibre-reinforced polymer (CFRP) composite using the optimal cutting parameters. The results indicate that (1) in the same cutting condition, the wear resistance of the coated tools with CVD diamond thin film is better, whose life is 7.5 times that of the uncoated cemented carbide tools. (2) The life of tools directly affects the quality of the machined surface. The size and density of burrs on the machined surface are proportional to the width of blade wear of tool when carbon fibre-reinforced polymer (CFRP) composite was machined. The coated tools with diamond thin film by Chemical vapour deposition (CVD) can effectively prevent the chemical wear and diffusion wear of tools, which will make the blade wear of tools slow and uniform. (3) In practice, based on the quality, efficiency and processing economy, the tools need to be regularly checked when the workpiece is cut to 5.4m, 40.5m length for uncoated tools and coated tools, respectively.