Boring parameters optimization for minimum surface roughness using CNC boring machine with passive damping material

Boring is also known as internal turning operation. Which is used to increases the internal diameter of the hole. Boring or internal turning operation is very critical manufacturing process. Which create surface roughness; vibration, noise, and tool wear related problems. In the boring operation of machining vibration is very critical problem In this work, boring tool with viscoelastic material such as Polytetrafluoroethylene (PTFE), Polyvinyl Chloride (Polyurethane) [PVC (Pu)], and Butyl rubber is mounted on boring tool as nut and bush arrangement. Boring operation was performed on EN8 material work piece with and without viscoelastic material damper on CNC machine. Taguchi optimization technique applied to determine the optimum boring parameters: spindle speed, feed rate, and depth of cut. Experimental results are appraised as surface roughness. PTFE gives better result as compare to other viscoelastic material PVC and Rubber. The surface roughness value decreases due to installation of PTFE damper on boring tool.