Improvement of Surface Finish in Boring Operation Using Composite Material

Abstract

Unwanted vibration in machine tools like lathe, milling, grinding and other machine tools is one of the elementary problems as it affects the quality of the machined parts, tool life, and noise during machining operations. Hence, these unwanted vibrations are desired to be suppressed or damped out while machining. In boring operations, the vibrations are a cumbersome part of the manufacturing process. Therefore, the present work puts the vibrations under examination and aims at studying the controllable parameter affecting the responses like amplitude of vibration of boring bar and surface roughness of machined parts. Vibration signals of the boring bar during machining were recorded on the screen of digital storage oscilloscope and the surface roughness of the machined parts were measured using the Talysurf. Composites plates made of Glass Fibre Polyester and Glass Fibre Epoxy were used as packing material on the tool post. The experiment is repeated with the composite plates by varying the number and the corresponding readings were recorded in order to study the effect of machining parameters such as; speed, feed and depth of cut on the response variables i.e. amplitude of vibration and surface roughness. Response Surface Methodology approach is used to develop the model equation for each set of experiment.