Direction: The following data relate to an orthogonal turning process: back rake angle = 15 deg. width of cut = 2 mm chip thickness = 0.4 mm, feed rate = 0.2 mm/rev
-
If the cutting force and the thrust force are 900 N and 810 N, the mean strength in MPa
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- 137.94
- 477.91
- 500.58
- 635.84
Correct Option: B
Fc = 900 N,
Ft = 810 N
| tanβ = | + tanα | ||
| Fc | |||
| 1 - | tanα | ||
| Fc | |||
| tanβ = | + tan 15° | ||
| 900 | |||
| 1 - | tan 15° | ||
| 900 | |||
β = 56.98°
| = | ||
| Fc | Rcos(β - ∝) |
Fs = 394.56 N
| Cs = | × sinφ = | × sin 29 | ||
| Wt1 | 2 × 0.2 |
Cs = 478 mpa
