Study of burr height in face milling of PH 13-8 Mo stainless steel––Transition from primary to secondary burr and benefits of deburring between passes

Abstract

Undesirable burrs formed in virtually all machining processes are wastes that hinder the assembly of mechanical components, alter the dimensions of the machined products and are harmful to machine tool operators. They are present in both macro and micromachining and severely affect precision of the machined components. In order to make important decisions towards reduction or complete elimination of burrs, it is essential to determine the size of the burr and its behavior when the cutting conditions are altered. This study involves face milling of PH 13-8 Mo stainless steel with coated carbide inserts and complement a recent work [1] that studied the influence of the cutting fluid application method, the cutting tool geometry and the radial depth of cut on burr dimensions. In the present work, the transition from primary to secondary burr and influence of the accumulated remnant burr between passes on the burr size were analyzed. The transition from primary burr to secondary burr depends considerably on the radial and axial depths of cut. Remnant burr height increases linearly as the number of passes increases.