guard means a barrier requiring adjustment for each job or die
Antirepeat means the part of the clutch/brake controls
system designed to limit the press to a single stroke if the tripping
means is held operated. Antirepeat requires release of all tripping
mechanisms before another stroke can be initiated. Antirepeat is also
called single stroke reset or reset circuit.
Automatic feeding means feeding wherein the material or
part being processed is placed within or removed from the point of
operation by a method or means not requiring action by an operator on each
stroke of the press.
Bolster plate means the plate attached to the top of the
bed of the press having drilled holes or T-slots for attaching the lower
die or die shoe.
Brake means the mechanism used on a mechanical power
press to stop and/or hold the crankshaft, either directly or through a
gear train, when the clutch is disengaged.
Brake monitor means a sensor designed, constructed, and
arranged to monitor the effectiveness of the press braking system.
Clutch means the coupling mechanism used on a mechanical
power press to couple the flywheel to the crankshaft, either directly or
through a gear train.
Concurrent means acting in conjunction, and is used to
describe a situation wherein two or more controls exist in an operated
condition at the same time.
Continuous means uninterrupted multiple strokes of the
slide without intervening stops (or other clutch control action) at the
end of individual strokes.
Control System means sensors, manual input and mode
selection elements, interlocking and decision-making circuitry, and output
elements to press operating mechanism.
Counterbalance means the mechanism that is used to
balance or support the weight of the connecting rods, slide, and slide
Device means a press control or attachment that:
Restrains the operator from inadvertently reaching into the point of
(ii) Prevents normal press operation if the operator's
hands are inadvertently within the point of operation; or
Automatically withdraws the operator's hands, if the operator's hands are
inadvertently within the point of operation as the dies close.
Die means the tooling used in a press for cutting or
forming material. An upper and lower die make a complete set.
Die builder means any person who builds dies for power
Die enclosure guard
means an enclosure attached to the die shoe or stripper, or both, in a fixed position.
Die set means a tool holder held in alignment by guide
posts and bushings and consisting of a lower shoe, an upper shoe or punch
holder, and guide posts and bushings.
Die setter means an individual who places or removes dies
in or from mechanical power presses, and who, as a part of his duties,
makes the necessary adjustments to cause the tooling to function properly
Die setting means the process of placing or removing dies
in or from a mechanical power press, and the process of adjusting the
dies, other tooling and safeguarding means to cause them to function
properly and safely.
Die shoe means a plate or block upon which a die holder
is mounted. A die shoe functions primarily as a base for the complete die
assembly, and, when used, is bolted or clamped to the bolster plate or the
face of slide.
Direct drive means the type driving arrangement wherein
no clutch is used; coupling and decoupling of the driving torque is
accomplished by energizing and deenergization of a motor. Even
though not employing a clutch, direct drives match the operational
characteristics of "part revolution clutches" because the driving power
may be disengaged during the stroke of the press.
Ejector means a mechanism for removing work or material
from between the dies.
Face of slide means the bottom surface of the slide to
which the punch or upper die is generally attached.
Feeding means the process of placing or removing material
within or from the point of operation.
Fixed barrier guard
means a die space barrier attached to the press frame.
Foot control means the foot operated control mechanism
designed to be used with a clutch or clutch/brake control system.
Foot pedal means the foot operated lever designed to
operate the mechanical linkage that trips a full revolution clutch.
Full revolution clutch means a type of clutch that, when
tripped, can not be disengaged until the crankshaft has completed a full
revolution and the press slide a full stroke.
Gate or movable barrier device means a movable barrier
arranged to enclose the point of operation before the press stroke can be
Guard means a barrier that prevents entry of the
operator's hands or fingers into the point of operation.
Guide post means the pin attached to the upper or lower
die shoe, operating within the bushing on the opposing die shoe, to
Hand feeding tool means any hand-held tool designed for
placing or removing material or parts to be processed within or from the
point of operation.
Holdout or restraint device means a mechanism, including
attachments for the operator's hands, that when anchored and adjusted
prevent the operator's hands from entering the point of operation.
Inch means an intermittent motion imparted to the slide
(on machined using part revolution clutches) by momentary operation of the
"inch" operating means. Operation of the "inch" operating means engages
the driving clutch so that a small portion of one stroke or indefinite
stroking can occur, depending on the length of time the "inch" operating
means is held operated. "Inch" is a function used by the die setter for
setup of dies and tooling, but is not intended for use during production
operations by the operator.
Interlocked press barrier guard
means a barrier attached to the press frame and interlocked so that the press stroke can not be
started normally unless the guard itself, or its hinged or movable
section, enclose the point of operation.
Jog means an intermittent motion imparted to the slide by
momentary operation of the drive motor, after the clutch is engaged with
the flywheel at rest.
Knockout means a mechanism for releasing material from
Liftout means the mechanism also known as knockout.
Manual feeding means feeding wherein the material or part
being processed is handled by the operator on each stroke of the press.
Operator's station means the complete complement of
controls used by or available to an operator on a given operation for
stroking the press.
Part revolution clutch means a type of clutch that can be
disengaged at any point before the crankshaft has completed a full
revolution and the press slide a full stroke.
Pinch point means any point other than the point of
operation at which it is possible for a part of the body to be caught
between the moving parts of a press or auxiliary equipment, or between
moving and stationary parts of a press or auxiliary equipment or between
the material and moving part or parts of the press or auxiliary equipment.
Point of operation means the area of the press where
material is actually positioned and work is being performed during any
process such as shearing, punching, forming, or assembling.
Presence sensing device means a device designed,
constructed and arranged to create a sensing field or area and to
deactivate the clutch control of the press when an operator's hand or any
other part of his body is within such field or area.
Press means a mechanically powered machine that shears,
punches, forms or assembles metal or other material by means of cutting,
shaping, or combination dies attached to slides. A press consists of a
stationary bed or anvil, and a slide (or slides) having a controlled
reciprocating motion toward and away from the bed surface, the slide being
guided in a definite path by the frame of the press.
Pullout device means a mechanism attached to the
operator's hands and connected to the upper die or slide of the press,
that is designed, when properly adjusted, to withdraw the operator's hand
as the dies close, if the operator's hands are inadvertently within the
point of operation.
Repeat means an unintended or unexpected successive
stroke of the press resulting from a malfunction.
Safety block means a prop that, when inserted between the
upper and lower dies or between the bolster plate and the face of the
slide, prevents the slide from falling of its own deadweight.
Semiautomatic feeding means feeding wherein the material
or part being processed is placed within or removed from the point of
operation by an auxiliary means controlled by the operator on each stroke
of the press.
Single stroke means one complete stroke of the slide,
usually initiated form a full open (or up) position, followed by closing
(or down), and then a return to the full open position.
Single stroke mechanism means an arrangement used
on a full revolution clutch to limit the travel of the slide to one
complete stroke at each engagement of the clutch.
Slide means the main reciprocating press member. A slide
is also called a ram, plunger, or platen.
Stop control means an operator control designed to
immediately deactivate the clutch control and activate the brake to stop
Stripper means a mechanism or die part for removing the
parts or material from the punch.
Stroking selector means the part of the clutch/brake
control that determines the type of stroking when the operating means is
actuated. The stroking selector generally includes positions for "Off"
(Clutch Control), "Inch," "Single Stroke," and "Continuous" (when
Continuous is furnished).
Sweep device means a single or double arm (rod) attached
to the upper die or slide of the press and designed to move the operator's
hands to a safe position as the dies close, if the operator's hands are
inadvertently within the point of operation.
Trip or (tripping) means activation of the clutch to
"run" the press.
Turnover bar means a bar used in die setting to manually
turn the crankshaft of the press.
Two-hand trip means a clutch actuating means requiring
the concurrent use of both hands of the operator to trip the press.
Two-hand control device means a two-hand trip that
further requires concurrent pressure from both hands of the operator
during a substantial part of the die-closing portion of the stroke of the
Unitized tooling means a type of die in which the upper
and lower members are incorporated into self-contained units arranged as
to hold the die members in alignment.