Turning CFRP Composites with Ceramic tool for Surface Roughness Analysis

Abstract This experimental study concentrates on the understanding of machining process in turning of carbon fiber reinforced polymeric composites using ceramic cutting tool. Carbon fiber reinforced polymer material has started replacing conventional materials a long back due to the excellent properties they possess for various applications in engineering and technology. Though they are produced to near net shape, often they are in need of machining. But it contains matrix and fiber reinforcement, which are soft and hard in nature respectively, resulting in anisotropic and non-homogeneous properties. Due to these properties of composite material, machining of these materials is completely different than that of the conventional materials such as metals. To understand the machinability of these materials, this experimental work has been undertaken. The experimentation was carried out using three machining parameters namely cutting speed, feed and depth of cut. The motivation of this experimental study was towards identification of machining parameter that plays a dominant role on surface roughness, because surface roughness affects various properties of material and strength. Further to identify the combination of machining parameters that provides desirable surface roughness. It used Taguchi's orthogonal array for easy conduction of experimentation and analysis of variance for analyzing the machining parameters. It was observed that the ceramic cutting tool offers satisfactory level of surface roughness.

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