-
A cast iron block of 200 mm length is being shaped in a shaping machine with a depth of cut of 4 mm, feed of 0.25 mm/stroke and the tool principal cutting edge angle of 30°. Number of cutting strokes per minute is 60. Using specific energy for cutting as 1.49 J/mm3, the average power consumption (in watt) is __________ .
-
- 290
- 198
- 298
- 398
Correct Option: C
Specific cutting energy
| = | = 1.49 J/mm3 | b × t1 |
| = | 4 × 0.25 |
Fc = 1.49 J/mm. stroke
| Fc = 1.49 J/mm × | min |
Fc = 89.4 J/mm.min
Power = Fc .1 = 89.4 × 200 mm J/mm.min
= 17880 J/min
Power = 298 J/S or (W).
