Cutting Force Model for Analysis of Burr Formation in Drilling Process

Abstract

Burr formation in the drilling process is discussed with the cutting force and the chip flow direction. An analytical model is presented to predict the cutting force based on the minimum cutting energy. Because the burr occurs on the backside of the machined plate in drilling, burr formation is associated with the axial component of the cutting force at the exit of the drill from the workpiece. The chip should also be controlled to flow toward the radial direction of the drilling tool. The lip geometry of the twist drill is discussed to reduce burr formation with the curved edges in the cutting simulation.