Open Access
Table 1
Experimental layout and results for the springback.
| S.No | Punch travel (mm) | Strain hardening index | Holding time (min) | Punch velocity (mm/s) | Width of the sheet (mm) | Spring back(degrees) |
|---|---|---|---|---|---|---|
| 1 | 10 | 0.22 | 2.5 | 0.666 | 40 | 3.7 |
| 2 | 15 | 0.27 | 5 | 0.499 | 70 | 1.7 |
| 3 | 15 | 0.27 | 5 | 0.166 | 50 | 3.1 |
| 4 | 20 | 0.24 | 2.5 | 0.666 | 40 | 2.4 |
| 5 | 15 | 0.27 | 0 | 0.499 | 50 | 0.8 |
| 6 | 15 | 0.27 | 5 | 0.499 | 50 | 1.4 |
| 7 | 15 | 0.27 | 5 | 0.499 | 50 | 2.2 |
| 8 | 10 | 0.22 | 7.5 | 0.333 | 40 | 1.9 |
| 9 | 15 | 0.27 | 5 | 0.499 | 50 | 2.3 |
| 10 | 15 | 0.27 | 5 | 0.499 | 50 | 2.4 |
| 11 | 10 | 0.24 | 7.5 | 0.666 | 40 | 3.2 |
| 12 | 20 | 0.22 | 2.5 | 0.666 | 60 | 3.2 |
| 13 | 10 | 0.22 | 7.5 | 0.666 | 60 | 1.6 |
| 14 | 20 | 0.22 | 7.5 | 0.333 | 60 | 0.8 |
| 15 | 20 | 0.22 | 7.5 | 0.666 | 40 | 2.2 |
| 16 | 20 | 0.24 | 7.5 | 0.333 | 40 | 2.6 |
| 17 | 10 | 0.24 | 2.5 | 0.333 | 40 | 3.5 |
| 18 | 15 | 0.23 | 5 | 0.499 | 50 | 2.5 |
| 19 | 20 | 0.24 | 7.5 | 0.666 | 60 | 1.7 |
| 20 | 15 | 0.27 | 5 | 0.499 | 30 | 4.2 |
| 21 | 20 | 0.22 | 2.5 | 0.333 | 40 | 2.8 |
| 22 | 10 | 0.24 | 7.5 | 0.333 | 60 | 3.3 |
| 23 | 15 | 0.27 | 5 | 0.499 | 50 | 3.5 |
| 24 | 15 | 0.21 | 5 | 0.499 | 50 | 2.5 |
| 25 | 15 | 0.27 | 5 | 0.833 | 50 | 1.7 |
| 26 | 15 | 0.27 | 5 | 0.499 | 50 | 2.7 |
| 27 | 5 | 0.27 | 5 | 0.499 | 50 | 4 |
| 28 | 20 | 0.24 | 2.5 | 0.333 | 60 | 2.1 |
| 29 | 15 | 0.27 | 10 | 0.499 | 50 | 2.8 |
| 30 | 10 | 0.24 | 2.5 | 0.666 | 60 | 1.9 |
| 31 | 25 | 0.27 | 5 | 0.499 | 50 | 3.2 |
| 32 | 10 | 0.22 | 2.5 | 0.333 | 60 | 3.6 |
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