Comparative study when modeling and multi-objectif optimization of machining parameters during turning Polyoxymethylene polymer using DFA, GRA and TOPSIS technics

This paper examines the effect of the material and machining parameters on cutting force, and surface roughness when turning polyoxymethylene POM C using a carbide tool. Turning experiments were conducted based on the Taguchi orthogonal matrix L16, taking into account cutting speed, cutting feed and cutting depth as input process parameters. Multi-objectif optimization was achieved through DFA, GRA, and TOPSIS methods. Results proved that both GRA and TOPSIS techniques provided a similar optimal parametric condition, namely a Vc = 500 m/min, a f = 0.08 mm/rev and a ap = 1 mm. On the other hand, the DFA method gives the following optimal parameters: Vc = 345.04 m/min, f = 0.09 mm/rev and ap = 1 mm. Experimental approach illustrates the feasibility and effectiveness of these proposed methods GRA and TOPSIS for multi-objectif optimization by contributing to the DFA method.