No abstract

This Paper presents a study of surface roughness, precision and delamination factor in use of Ti-Namite carbide K10 end mill, Solid carbide K10 end mill and Tipped Carbide K10 end mill. A plan of experiment based on Taguchi was established with prefixed cutting parameters and the machining was performed. An Surfcoder to examine the surface roughness and Infrared Thermography to examine the delamination of chopped Glass fiber-reinforced plastic (GFRP) laminates was used. Earlier works reports that cutting velocity and feed rate makes significant contribution to overall performance. But, the experimental results of this paper indicates that the depth of cut are recognised to make the most significant contribution to the overall performance as compared to cutting velocity and feed rate. The objective was to establish a correlation between cutting velocity, feed rate and depth of cut with surface roughness and delamination in a GFRP laminate. The correlation was obtained by multiple-variable linear regression using Minitab14 software.

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Modern composite materials constitute a significant proportion of the engineered materials market ranging from everyday products to sophisticated niche applications. While composites have already proven their worth as weight-saving materials, the current challenge is to make them machinable with minimum tool wear. In this study an attempt has been made to fabricate Glass fibre reinforced composites using hand moulding techniques and test its machinability based on delamination and tool wear using Ti-Nimate Coated Carbide and Ti-Carbonitride K10 end mill. The experiment was conducted in Vertical Machining Centre using Taguchi L8 orthogonal array. The test results showed that Ti-Carbonitride causes less damage to material during milling of glass fibre reinforced plastics (GFRP), whereas Ti-Nimate Coated Carbide has less tool wear at high speed, feed and depth of cut.