Title: The applicability of Taylor's model to the drilling of CFRP using uncoated WC-Co tools: the influence of cutting speed on tool wear
Authors: Julián Luis Merino-Pérez; Eleanor Merson; Sabino Ayvar-Soberanis; Alma Hodzic
Addresses: Industrial Doctorate Centre in Machining Science, The University of Sheffield, Sir Frederick, Mappin Building, Mappin Street, Sheffield, S1 3JD, UK ' Sandvik Coromant, Sandvik AB, Advanced Manufacturing Park, Unit 8, Morse Way, Waverley, Sheffield, S60 5BJ, UK ' Advanced Manufacturing Research Centre with Boeing, The University of Sheffield, Advanced Manufacturing Park, Wallis Way, Catcliffe, Rotherham, S60 5TZ, UK ' Department of Mechanical Engineering, The University of Sheffield, Sir Frederick, Mappin Building, Mappin Street, Sheffield, S1 3JD, UK
Abstract: This work investigates the applicability of Taylor's model on the drilling of CFRP using uncoated WC-Co tools, by assessing the influence of cutting speed (Vc) on tool wear. Two different resins, possessing low and high glass transition temperatures (Tg), and two different reinforcements, high strength and high modulus woven fabrics, were combined into three different systems. Flank wear rate gradient exhibited to be more reinforcement dependent, while the actual flank wear rate showed to be sensible also to the type of resin. In terms of tool life, all CFRP systems adjusted into a power-type tool life vs. cutting speed curve through the full range of cutting speeds (1,000 RPM to 18,000 RPM). Therefore, Taylor's model can be applied to estimate the tool life in the drilling of CFRP using uncoated WC-Co tools with good accuracy.
Keywords: Taylor model; cutting speed; tool wear; flank wear; tool life; glass transition temperature; SEM; CFRP drilling; CFRP machining; machinability; uncoated tools; WC-Co tools; tungsten carbide; cobalt; carbon fibre reinforced polymer.
International Journal of Machining and Machinability of Materials, 2014 Vol.16 No.2, pp.95 - 112
Received: 07 Aug 2013
Accepted: 07 Feb 2014
Published online: 10 Sep 2014 *