Open Access
Table 3
Experimental condition.
| Blank | Material | SUS304, SUS430, A6061-T6, C1100 (All JIS) |
| Outer diameter DB / mm | 50, 60 | |
| Thickness t0 / mm | 0.25, 0.3, 0.5 | |
| Punch | Material | SKD11 (JIS) |
| Outer diameter DP / mm (Clearance) C /mm |
28.4 (0.8), 29.2 (0.4) | |
| Radius RP / mm | 3 | |
| Die (Common) | Material | SKD61 (JIS) |
| Inner diameter DD / mm | 30 | |
| Single R die | Radius RD / mm | 3 |
| Multiple R die | Shape factor f | 4 |
| Minimum radius RDmin / mm | 3 | |
| Maximum radius RDmax / mm | 5 | |
| Angle between the material rolling direction and die reference direction α / ° | 0, 45 | |
| Blank holder pressure PB / MPa | 1.47, 1.96, 2.94 | |
| Punch velocity VP / mm.s−1 | 5 | |
| Lubricant | G-3060M (NIHON KOHSAKUYU CO., LTD.) | |
| Experimental temperature | Room temperature | |
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