OPTIMIZATION OF CUTTING PARAMETERS FOR DRILLING AISI P20 DIE MOLD ALLOY STEEL WITH TAGUCHI AND GRA METHODS

Abstract

AISI P20 mold steel, plastic materials are widely used in plastic die molding. In this article, AISI P20 mold steel was drilled by using uncoated HSS twist drills. Holes were drilled by using Ø8 mm drill bit, three cutting speed (v:10, 13 and 17 m/min) and three feed rate (f: 0.1, 0.2 and 0.3 mm/rev) parameters, and woodpecker drilling method. Taguchi L9 model has been used in the drilling tests. Cutting forces and torque were measured during the experiments by a dynamometer. The surface roughness and diameter of drilled holes have been checked. Taguchi and ANOVA analyses were done to determine effects of cutting parameters on the experimental results. Grey Relation Analysis (GRA) was used to determine the effective of cutting parameters that were optimized results of the tests. The results showed that the federate in the cutting parameters was the main effective factor. Moreover, the heights cutting speed (17 m/min) and the lowest federate (0.1 mm/rev) pointed out optimum cutting parameters to optimize the test results.

Keywords

• AISI P20,drilling,cutting forces,Grey Relation Analysis,Taguchi

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