A. |
When the
press accelerates the die, heat caused by "internal friction"
is generated. Temperatures up to melting point can be reached.
|
B. |
The temperature
increase occurs adiabatically due to an extreme short time
and energy concentration. This virtuallly eliminates work
hardening.
|
C. |
The moving
die separates the material into two pieces and the surfaces
cool down instantly.
|