Study the Optimization of Different Cutting Tools Performance during Drilling KENAF Polymer Composite

Lim, Jin Loong (2018) Study the Optimization of Different Cutting Tools Performance during Drilling KENAF Polymer Composite. Final Year Project (Bachelor), Tunku Abdul Rahman University College.

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Abstract

In this research paper, the work focused on the investigation of the effect of different type of carbide cutting drills on the surface roughness and delamination during drilling the Kenaf Fiber Composite. Three different type of carbide cutting tools is used which are uncoated DR30 stub twist drills, coated DR30 stub twist drills and coated DR45 high performance drills. Not only that, the characteristic of delamination and hole’s surface roughness is evaluated by considering the cutting speed and feed rate where cutting speed is range from 2122 RPM to 4244 RPM and feed rate is range from 100mm/min to 200mm/min. The design of experiment is done by using full factorial with two levels defined for the cutting parameters. The effect of cutting speed and feed rate on the surface roughness and delamination were investigated. The surface roughness decrease when cutting speed increase and feed rate decrease. Delamination effect primarily depends on the feed rate whereas the cutting speed’s effect and significantly negligible. Optimization cutting condition for each cutting tools also be determined by using the Design Expert Software. The details of surface roughness of the model by ANOVA is presented in this research. From this research, when cutting speed increase and feed rate decreases, the surface roughness will decreases. While delamination is affected by feed rate and cutting speed effect can be almost negligible.