is self evident that, if a tool or Die is to be run in a given
press machine, the tool much be designed to in accordance
with the various press dimensions with pertain to the die
to press relationship. These dimensions are normally taken
from the press specification chart. The required dimensions
may be ascertained by actually measuring the specific press
in which the die is to be run.
In general, some metal stamping terms and glossary such as
Die shut height, Press shut height, feed
height etc. have to be understood.
Shut Height .
the shut height of the press is the distance from the top
surface of the upper shoe to the lower surface of the lower
shoe when the tool is in the lowest operation position. When
the tool is been operated in the press, the press shut height
and the die shut height coincide exactly. With cutting die,
the die shut height normally becomes slightly lower each time
after the die is sharpened.
Press shut height is always means the dimension from the table
surface to the press's ram when the press is at bottom dead
center ( BDC) position, maximum press shut height means the
press adjustment is at it highest stroke down position. In
considering minimum press shut height, the ram adjustment
is down with the ram extended to its lowest position.
For tools when are feed manually, the feed height is not critical.
However, when dies are use in conjunction with automatic feeding
devices, the height of the stock line of the die must be within
the range permitted by the feeding device.