Open Access
Table 1
Hot stamping parameters of square cup [5].
| Parameters | Values |
|---|---|
| Initial plate dimensions (mm) | 240 × 240 |
| Die inner length × width (mm) | 119 × 119 |
| Die entrance radius Rd (mm) | 13, 15, 17, 20 |
| Die corner radius Rc (mm) | 10, 13, 15, 17, 20 |
| Upper punch length × width (mm) | 108 × 108 |
| Upper punch radius Rp (mm) | 10 |
| Upper punch stroke (mm) | 60 |
| Blank holder force (kN) | 24, 28, 32, 36, 40 |
| Friction coefficient between plate and tools | 0.17 |
| Environment temperature (°C) | 25 |
| Upper punch temperature (°C) | 25 |
| Temperature of counter punch, die and blank holder (°C) | 150 |
| Initial plate temperature (°C) | 300, 350, 400, 450 |
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