QDC: quick die
die change: utilization of means to reduce die transition
time. NOTE: Means to achieve quick die
change usually include the following: (a) moving bolsters or
die carts; (b) automatic die clamps; and
(c) preprogrammed controls.
disconnect: a coupling device that can be connected or disconnected without
the use of tools. NOTE: Commonly
associated with, but not limited to, pneumatic and hydraulic systems.
ram: preferred term is slide.
capacity: the maximum force
that a slide is designed to apply at the rating point.
point: the predetermined distance, from the stroke closed position
of the slide, at which the maximum force of the press is designed to be applied. NOTE: The maximum force that can be
applied is reduced as the distance from the
stroke closed position is increased. Capacity at any point in the working stroke can be determined by use of the tonnage curve of the
repeat: an unintended or
unexpected successive stroke of the press.
restraint device: a safeguarding device,
with attachments for the operator’s hands and wrists, that prevents the operator from reaching into the point of operation at all times. NOTE: A
restraint device may be likened to a nonmoving
(1): a plate or fabrication inserted under the die set to
accommodate die height to the press shutheight.
(2): a plate or fabrication inserted under the die set to obtain
the desired pass line height.
(3): a plate or fabrication inserted under the die set to allow
for placement of a conveyor(s) for removal of parts or scrap.
rolling bolster: preferred term
is moving bolster.
carriage: preferred term
is moving bolster.
subplate: preferred term
is die cart plate.
rotary cam limit
switch: preferred term
is rotary limit switch.
switch: a press-driven
rotating control device that initiates, maintains, or interrupts control
functions based on crank angle (slide
run: the operating modes that
produce single cycle or continuous cycling of a press.
run-button stand: preferred term
block: a prop that is inserted
between opposing tool or press members. NOTE: Safety blocks are not intended or designed to stop a powered stroke of the slide.
block device: preferred term is safety
residual waste or discarded material produced by a
SDAU: stroke down, adjustment
setup: the process of adjusting
the press, and the installation and adjustment of tooling, auxiliary equipment,
and appropriate safeguarding, to ensure proper and safe operation
of the press production system.
operator: an individual who is responsible to prepare the press prior
to production and who controls the press during production operations.
shutheight: use the applicable
preferred term, die shutheight or press shutheight.
press: any press with a single
cycle: a complete movement of the slide from the initial start
position, to the return and stop at the same start position. Reference: cycle.
capability: a mechanism or
control arrangement used to automatically initiate stopping action of the press at the completion of a cycle. NOTE: Single cycle capability can
be accomplished by the use of a single stroke
mechanism on full-revolution clutch presses or by an antirepeat control on full- or part
revolution clutch presses. Reference: antirepeat; single stroke mechanism.
mechanism: preferred term
is single stroke mechanism.
mode: preferred term
is single stroke mode.
drive: a press with a
crankshaft (or eccentric shaft) driven from one end.
single-piece frame: preferred term
is one-piece frame.
press: a press with force
transmitted to the slide through one connection.
stroke: preferred term is single
capability: preferred term
is single cycle capability.
mechanism: a mechanical device
on a full revolution clutch that limits the travel of the slide to one complete cycle at each engagement of the clutch. NOTE: A single stroke
mechanism is a mechanical means of providing an
antirepeat function. Reference: single cycle
capability. single stroke
mode: an operating mode of a press wherein a
single cycle of the press is produced by each operation of the actuating control.
stroke rate: preferred term is single trip
reset: preferred term
trip rate: allowable single cycles per
slide: the press member(s) that
reciprocates linearly and to which the tooling is attached.
adjustment (1): on a mechanical power press, the distance the press shutheight can
adjustment (2): on a mechanical power press, the mechanism for adjusting the press
shutheight. NOTE: Slide adjustment
mechanisms may be manually or power operated.
adjustment lock: the mechanism provided to prevent unintended change in the press
counterbalance: preferred term is counterbalance.
face: the surface of the slide
to which the punch or upper die is generally attached.
lock: an integral mechanical device to prevent unintended slide
movement. NOTE: Slide locks are not intended or designed to stop a powered stroke of the slide. Reference: safety block.
separation: the distance
between the faces or die mounting surfaces of the inner slide and the outer
slide of multiple action presses. NOTE: Slide separation is
shown on a motion diagram and is usually defined in three conditions: minimum, normal, and maximum. Reference: maximum separation; minimum separation; normal
bolster: a bolster arranged
for moving the lower die into and out of the point of operation for the
purpose of parts feeding. NOTE: In some industries,
bolster is synonymous with moving
bolster. Reference: moving
frame: preferred term
is one-piece frame.
a plate or fabrication installed between the die(s) and
the slide to accommodate the press shutheight. Reference: riser.
strokes per minute. NOTE: SPM states the speed of the
press expressed as continuous cycles per minute.
spotting press: a power press used in
the final finishing of dies to indicate (spot) inaccuracies, and also to
test mating and functioning of the die parts. NOTE: A
spotting press is usually of low capacity in relation to die area or die rating.
cushion: a die cushion that uses springs to produce the
stamping (1): the end product of a
press operation, or series of operations, wherein a workpiece is generated by processing flat (or preformed) strip or sheet stock between
opposing members of a die. NOTE: During the
operation(s), the material is subjected to force sufficient to cut the part, form the part, or
both, into the required configuration.
stamping (2): a general term used to
describe the process, or the press operations, or both.
rod: a tie rod used on a gap frame press.
Reference: tie rod.
a cessation of movement, action, or
(2): for a press, the cessation of slide
motion. NOTE: For a mechanical
power press, stop is usually accomplished by disengaging the clutch or other drive means, and engaging the brake. Normal stopping of the mechanical
power press slide is initiated as follows: (a) in SINGLE STROKE mode, by the control system, usually
through a cam on the rotary limit switch; (b) in INCH mode, by
removal of the hands from the INCH push buttons; and (c) in CONTINUOUS mode, by use of the TOP STOP push
emergency stop; top
control: an operator control,
usually a push button that, when actuated, initiates a stop of the slide.
NOTE: For a mechanical power press, actuation of the stop
control usually is arranged to disengage the clutch and engage the brake without stopping the flywheel. Reference: emergency stop control; top stop.
control: on a hydraulic power
press, a control that stops and returns the slide to its initial position.
stopping-performance monitor: a system or device to
monitor brake performance of the press.
straight side press: a general classification
of presses with uprights or housings that have plain, flat sides (usually vertical) that bound or enclose the left and right hand sides of the
stretch forming: the process of shaping
sheet metal by stretching it over a form.
stripper: a mechanism or die part
for releasing the material or workpiece(s) from the die.
stripping: the motion that releases
the material or workpiece(s) from the die. NOTE: Stripping is shown on
a motion diagram of a multiple action press as the measured
distance the inner slide raises before the outer slide begins to rise.
stroke: the movement of the
slide from the open to the closed position. Reference: cycle; single
length: the distance that the
slide travels from the open to the closed position.
position indicator: means to indicate
press crank angle.
stroking selector: preferred term
is mode selector.
tank: a reservoir provided in
a pneumatic system to reduce pressure fluctuations in the operation of
synchronous press line: a press production
system with two or more presses and with automatic synchronized parts loaders, parts conveyance between presses, and parts
T-stand: an operator station
mounted on a free-standing pedestal, not attached to the press, but connected
box or to the press control by a flexible cord. NOTE: A T-stand
may be connected by means of a terminal by a plug
and receptacle. Typically, T-stand will include: (a) two (2) two-hand
RUN controls; (b) one (1) STOP control; and
(c) one (1) TOP STOP control, when
required. When required to
ensure minimum safe distance from the nearest point of operation, safety standards require the T-stand to be secured in position.
table: preferred term
is adjustable bed.
tail-out: the act of passing the
end of strip material through, between, or across the press or its tooling and
action: preferred term is lower
the act of passing the leading end of strip material
through, between, or across the press or its tooling and components.
throat: an opening or recess in
the press frame to permit positioning of the material or workpiece(s).
depth: on a gap frame press, the distance from the slide centerline
to the frame.
throw: in crank or eccentric
presses, the distance from the centerline of the crankshaft (or main shaft) to
the centerline of the crankpin (or eccentric). NOTE: The throw is
equal to one half of the stroke length.
rod frame: a straight side press frame made up of bed, crown, and uprights
held together by prestressed tie
rods: steel rods, threaded at both ends for nuts, used to
prestress tie rod frames. NOTE: Infrequently used to reduce deflection in gap frame presses.
press: a multiple action press that uses a toggle mechanism to
provide the dwell motion of the inner slide. NOTE: Toggle mechanisms are also used in special purpose single action presses such
as knuckle joint and link drive
presses. Reference: double action press; dwell; triple action
curve: a graphical
representation, based on drive torque, to show allowable press force as a
function of slide positions during the working portion of
tooling: a punch, die, shear,
etc., used in a press for the manufacture of parts. Reference: die(s).
plate: the interface between
the upper die(s) and the press slide when using die clamps. NOTE: The top clamping plate is fastened to the top of the die. It is then
fastened to the slide by actuation of the die
clamps. The top clamping plate is normally the size of the press slide.
drive press: any press with the drive mechanism above the
stop: an operator control used to stop continuous cycling at the
end of a complete cycle, or at another predetermined point in the cycle. NOTE: A TOP STOP control action is delayed, after
actuation of the actuating control, so as to
cause stopping at the predetermined point.
torque: the moment of force that
is the product of the force and the length of the lever arm. NOTE: Clutch
torque produces, or tends to produce, rotation in a body at
rest. Brake torque retards, or tends to retard, rotation in a rotating body.
arm: the perpendicular distance from the center of rotation to
the line of action of a force.
curve: preferred term is tonnage
transfer feed: an automatic mechanism
that moves workpiece(s) from one die station to the next by means of reciprocating motions. NOTE: Workpiece handling devices include: (a) grippers; (b) suction cups;
and (c) mechanical fingers. These devices are mounted to transfer rails. The rails are located on
opposite sides of the die. The transfer
mechanism(s) move in as many as three axes, which are: (a) clamp
motion; (b) lift motion; and (c) transfer motion. References: crossbar transfer feed; tri-axis transfer feed; two-axis transfer feed; walking
press: an automatic press
equipped with a transfer feed.
transmission: the mechanical drive
components, usually including speed changing means, by which power is transmitted from the source (driving) members to the output (driven)
traveling die clamp: a die clamp that can
move and clamp at any location when conventional T-slots are provided. NOTE: The clamp unit is controlled within the T-slot, which also
includes and protects the movement device, whether a
chain, spindle, or hydraulic cylinder.
tri-axis transfer feed: a transfer feed that is
capable of clamp motion, lift motion, and transfer motion. Reference: crossbar transfer feed; transfer feed; two-axis transfer feed; walking
the momentary actuation of the press control to
initiate a press cycle.
control: a mechanism for actuating a power press. Also used as a
general term to describe any press actuating device.
action press: a multiple action press with three
the actuation of press motion, using a trip
turnover bar: a bar used to manually
turn the flywheel or crankshaft.
end drive: a geared press with the crankshaft (or eccentric shaft) driven
from both ends.
two-axis transfer feed: a transfer feed that is
capable of clamp motion and transfer motion. Reference: crossbar
transfer feed; transfer feed; tri-axis transfer feed; walking beam.
control: an actuating control
that requires concurrent use of both hands of the operator to initiate
and continue the press stroke. Reference:
actuating control; two-hand control
device: a two-hand control
used as a safeguarding device. NOTE: A two-hand control device requires holding the push buttons depressed during a substantial
portion of the closing stroke of the slide.
Removal of hands during the closing travel of the slide results in a stopping action.
Reference: actuating control; two-hand control.
trip: a mechanical actuating
control that requires the concurrent use of both hands of the operator
to actuate the press. Reference: actuating control; two-hand
two-hand trip device: a two-hand trip used as
a safeguarding device. NOTE: A
two-hand trip device requires only a momentary concurrent activation of the push buttons (or
other operating mechanisms) to set the slide immediately into
motion. Instantaneous removal of the hands cannot
recall the action or stop the motion. A two-hand
trip device is usually applicable to full revolution clutch equipment, and a two-hand control
device is possible only with part-revolution clutch
equipment. Reference: operator control; trip control; tripping; two-hand
a press with the force transmitted to the slide through