- - Cylinder assembly consists of
a cylinder, piston, ram, packing, and seals. Piston diameter and oil pressure
determine the force (tonnage) that a given press can deliver.
- - The main structure of the press
containing the cylinder(s) and the working surfaces.
- - Stroke length can be set
for any distance within the stroke limits of the cylinder. Adjustments include: top
of stroke, pre-slowdown point, and bottom of stroke.
- - The distance from the vertical
centerline of the ram to the frame member behind the bed. This distance determines the
largest diameter piece that can be positioned with the part centerline under the
center of the ram.
- - The vertical clearance from the
top of the bolster to the underside of the ram in its maximum up position. This term
sometimes is confused with the mechanical press term "shut height". Shut height
is the clearance over the bed with the ram full down. "Daylight" describes the
maximum vertical capacity of the press.
- - A plate or structure mounted on
the bed. Hydraulic press manufacturers provide a removable bolster on most models.
- - Flat, stationary machined surface
that supports the bolster or dies.
- - A common method
of actuating hydraulic presses. Both buttons must be depressed at the same time to
bring the ram down requiring the operator to use both hands. Control circuits include non-repeat
and anti-tie down features.
- - The distance from the floor
to the top of the bolster.
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- A control controlled force to hold the
edges of the blank in deep drawing operations. Similar to a die cushion.
- A hydraulic or air cylinder
positioned below the bolster and bed, providing uniform blank holding in deep drawing.
Cushions also strip finished parts from the punch or die.
- An adjustable limit switch
to set depth of stroke at which ram reverses.
- An adjustable timer to set the length
of dwell at the bottom of the stroke. The timer may be used for other functions such as timing a
sequence of press movement.
- A device attached to the oil
reservoir to circulate water or air to keep oil at proper operating temperature.
- A device to strip the part from the
punch or die.
- A plate-sometimes heated-attached to a moving or
stationary press member.
- An adjustable switch to
set the pressure at which ram reverses.
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