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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