Observation of Drilling Burr and Finding out the Condition for Minimum Burr Formation

Abstract EN

Suppression or elimination of burr formation at the exit edge of the workpiece during drilling is essential to make quality products.

In this work, low alloy steel specimens have been drilled to observe burr height under different machining conditions.

Taper shank, uncoated 14 mm diameter HSS twist drills are used in these experiments.

Dry environment is maintained in experiment set I.

Water is applied as cutting fluid in experiment set II.

In the next four sets of experiments, the effect of providing back-up support material and exit edge bevel is observed on formation of burr at the exit edge of specimens under dry and wet conditions.

It is revealed that an exit edge bevel of 31 degrees with water as the cutting fluid gives negligible burr at the exit edge of the drilled hole at certain machining conditions.

Use of a back-up support can also reduce drill burr to a large extent.

In this paper, artificial neural networks (ANN) are developed for modeling experimental results, and modeled values show close matching with the experimental results with small deviations.