The following is the procedure for mounting the die cushion to
the press bed:
(1) Remove the bolster plate and check both surfaces carefully
to make sure they are flat and parallel. THIS IS IMPORTANT! If
surfaces are bowed and not parallel, have them machined so that
the pin pressure pad of the cushion will have an accurate surface
to stop against.
(2) Screw the ends of the suspension rods with the short length
of thread into the drilled and tapped holes in the press bed,
which have been provided for mounting the die cushion. Make sure
these rods are pulled up as for as they will go into the tapped
holes. If the cushion is to be suspended from mounting bosses
that are not tapped, the mounting rods are provided with nuts
on both top and bottom of the bosses.
(3) With the use of skids or timbers, slide the cushion unit into
the approximate location relative to the press bed opening. (NOTE:
If the distance between the mounting rods at the front of the
press bed is not enough to allow the cushion to pass between them,
it is advisable to leave them out until after the cushion has
been placed under the press bed opening.)
(4) Run on the upper adjusting nuts as far as they will go. Raise
the cushion unit so that the rods pass through the holes in the
mounting plate or mounting channels and run on the lower adjusting
nuts.
(5) Prepare a measuring rod from 3/16" round steel for adjusting
the height and alignment of the cushion unit. The over-all length
of this rod should be equal to the overall height of the cushion
when expanded, plus the thickness of the pin pad minus 1/8".
The 1/8" is allowed to make sure that the pin pressure pad
comes to rest against the bottom of the bolster plate.
(6) With a large parallel laid on top of the press bed, line up
the supporting structure at the four corners marked by using the
measuring rod. The adjustment and alignment of the mounting plate
at these four points must be held to a maximum tolerance of 1/64"
to avoid a tilting action. After this adjustment is obtained,
lock the upper adjusting nuts on the mounting plate, which will
secure the cushion unit in correct parallel alignment and relative
height in connection with the top of the press.