Simulation embossing
15.3
| Elongation thickness | εs | = | % | ||
| Minimal thickness | smin | = | mm | ||
| Natural strain | φ | = | |||
| Flank angle | α | = | ° | ||
| Stamp power | FSt | = | kN | ||
| Stripper force | Fab | = | kN | ||
| Work embossing | WH | = | kJ |
| Height | h | = | mm | |||
| Upper belt | o | = | mm | |||
| Draw distance | w | = | mm | |||
| Bottom chord | u | = | mm | |||
| Sheet thickness | s0 | = | mm | |||
| Punch radius | rSt | = | mm | |||
| Die radius | rM | = | mm | |||
| Tensile strength | Rm | = | MPa |
Calc 1
Rotationally symmetric embossing14
In this simulation, the sheet thinning at the point with the smallest thickness, εS , is numerically approximated. At this point the state of plane stress prevails, also known as “plain strain” ( φ2 = 0). The time of failure can therefore be estimated by taking the material’s flow limit curve into account.2014
The simulation concerns a rotation-like stamped part. With rectangular stamped parts, comparable stresses occur in the corners of the drawn part.
14
Doege, E.; Breidohr, B. / EFB-Forschungsbericht Nr. 35: Untersuchungen zum Tiefziehen von Teilen mit unebenen Bodenformen / Europäische Forschungsgesellschaft für Blechverarbeitung e. V. / Hannover / 1988 / …
20
Wolf, H.; Kluge, S. / Spannungs- und Formänderungsuntersuchungen beim Hohlprägen von Formfeldern / Umformtechnik 20 / Zwickau / 1986 / …