Research Article
Research on Springback Control in Stretch Bending Based on Iterative Compensation Method
Table 4
Experimental results of stretch bending with invariable-curvature die shape for ST12 steel specimens.
| | ρd (mm) | Kd (10−7 mm−1) | No. | T (N) | ρ (mm) | ρp (mm) | K (10−7 mm−1) | Kp (10−7 mm−1) | Kd-Kp (10−7 mm−1) | Knext (10−7 mm−1) |
| | 450 | 22222 | 1 | 8000 | 450 | 453.9 | 22222 | 22031 | 191 | 22413 | | 2 | 8000 | 446.2 | 450.5 | 22413 | 22196 | 26 | 22439 | | 3 | 8000 | 445.7 | 450.1 | 22439 | 22217 | 5 | — |
| | 300 | 33333 | 1 | 8000 | 300 | 304.4 | 33333 | 32850 | 483 | 33816 | | 2 | 8000 | 295.7 | 301 | 33816 | 33227 | 106 | 33952 | | 3 | 8000 | 294.5 | 300.1 | 33952 | 33318 | 15 | — |
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