Burr formation in intersecting holes

Abstract

Regarding intersecting holes, the edges of cut are often difficult to access, as they are located inside the components. Hence it requires a lot of time and money to deburr them. In addition, burrs which come off in the later operation can lead to resultant damages. Examinations of intersecting holes showed that the effective exit surface angle, the angle between drill wall and exit surface, is crucial for burr formation. Based on the burr calculation for exit surfaces perpendicular to the drill axis, a method of calculation was developed out of the experimental results. By means of this calculation method the burr value g can be predicted for the short hole drilling of intersecting holes.

Burrs—Analysis, control and removal

“…In [74] the effects of drill type, geometry of intersection and process conditions on the drilling burr formation are examined. The burr formation in drilling intersecting holes is studied as well in [60,95], and in [143] (Fig. 23).…”