Research Article
Observation of Drilling Burr and Finding out the Condition for Minimum Burr Formation
Table 1
Experimental conditions.
| Machine tool | Radial drilling machine, Make: Energy Limited, India, Model: RDH-32/930 | Main motor power: 1.5 kW |
| Tool holder | R/L 265 ME-20 AL, Make: Sandvik Asia Limited, India |
| Cutting tool | Taper shank, uncoated 14 mm diameter HSS twist drill, Make: Miranda (India) |
| Workpiece material | Low alloy steel, hardness: 225 HB | Composition: C (0.17%), Si (0.21%), Mn (0.63%), P (0.09%) |
| Workpiece size | 100 mm × 50 mm × 6 mm |
| Cutting velocity | 20, 25 and 31 m/min |
| Feed | 0.032, 0.05 and 0.08 mm/rev |
| Environment Experiment sets | Dry and water-cooled | I—Drilling in dry condition without any back-up support or edge bevel | II—Drilling with water cooling without any back-up support or edge bevel | III—Drilling in dry condition with a back-up support | IV—Drilling in water-cooled condition with a back-up support | V—Drilling in dry condition with 31° exit edge bevel | VI—Drilling in water-cooled condition with 31° exit edge bevel |
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