Burr Formation in Drilling Intersecting Holes

The increasing power density in engine manufacturing as well as the complexity of parts in automotive production demand for an entire control of burr formation especially in regard of intersecting holes. This paper presents an approach to control burr formation concerning reproducible generation of burrs depending on intersecting geometry and process parameters. Therefore two process models describing burr formation and burr cap formation and results of experimental investigations of different workpiece materials (AISI 4140H (42CrMo4), 226D AlSi9Cu3)) were combined.