Vibration and noise reduction of a circular saw blade with applied piezoceramic patches and semi-active shunt networks

Abstract

Circular saws are widely spread tools for machining wood, metal, plastics or even stone. Common for them is a circular blade with teeth or a diamond dust coating on the outer edge used for cutting material. Because of their thin blade, they are sensitive to vibrations and intense noise. To reduce the amplitude of noise and vibration, piezoceramic patches with semi-active shunt networks based on operational amplifiers are used. For optimum damping performance, an actuator placement is developed by modal analysis of the circular saw blade. For verification of the actuator placement and the design of the shunt networks, a saw tool is developed for measurement and practical cut-ting tests with a real saw blade in a circular saw test stand in the Institute for machine tools and production engineering (IWF) at the TU Braunschweig.