Abstract
In this paper, L8 Taguchi array is applied to find the most important parameters effects on the radial and tangential cutting forces of a Ti–6Al-4V ELI titanium alloy in dry high speed machining (DHSM). The experiments are performed in four cutting speeds of 150, 200, 250, and 300 m/min and two feed rates of 0.03 and 0.06 mm/rev. Also, two cutting tools in types of XOMX090308TR-ME06 of uncoated (H25) and TiAlN+TiN coated (F40M) are used. Results confirm that to minimize the resultant cutting force and radial cutting force, utilizing the lower feed rate and higher cutting speeds were considered as the best levels of factors to reach to its goal.
Highlights
Titanium alloys are a common type of difficult-to-machine materials that are used in many industrial fields such as aerospace, automotive, oil, and gas as well as medical devices
The present study aims to apply the multi-objective Taguchi method to find the most critical parameter effects on the tangential and radial cutting force of Ti–6Al-4V ELI titanium alloy in dry high speed machining conditions
SECO Rhombus shape cemented carbide insert with designation XOMX090308TR-ME06 of uncoated (H25) and TiAlN+TiN coated (F40M) types are used as the cutting tools
Summary
Titanium alloys are a common type of difficult-to-machine materials that are used in many industrial fields such as aerospace, automotive, oil, and gas as well as medical devices. High strength-to-weight ratios, steadily high mechanical properties at high temperatures and high resistance to corrosion are some properties that make them preferred materials Their properties of high thermal capacity and low thermal conductivity lead to a high increase in heat generated locally at the tool–chip interface, combined with the tendency of stickiness to cutting tools during machining [1]. Safari et al [1], in an experimental study, investigated the cutting forces induced during high-speed end milling of titanium alloy (Ti–6Al-4V ELI) as well as the surface quality of the milled surfaces Their experiment was performed in three cutting speeds of 200, 250, and 300 mm/min and two feed rates of 0.03 and 0.06 mm/tooth and found that cutting force is inversely proportional to cutting speed regardless of cutting tool type. They showed an increase in cutting speed at the lower feed rate improved surface roughness when a coated tool was used while no improvement in surface finish was detected when using an uncoated tool
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