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QDC: quick die change.

quick 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.

quick 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.

rated capacity: the maximum force that a slide is designed to apply at the rating point.

rating 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 press.

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 pullback device.

riser (1): a plate or fabrication inserted under the die set to accommodate die height to the press shutheight.

riser (2): a plate or fabrication inserted under the die set to obtain the desired pass line height.

riser (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.

rolling carriage: preferred term is moving bolster.

rolling subplate: preferred term is die cart plate.

rotary cam limit switch: preferred term is rotary limit switch.

rotary limit switch: a press-driven rotating control device that initiates, maintains, or interrupts control functions based on crank angle (slide position).

run: the operating modes that produce single cycle or continuous cycling of a press.

run-button stand: preferred term is T-stand.

safety 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.

safety block device: preferred term is safety block.

scrap: residual waste or discarded material produced by a stamping process.

SDAU: stroke down, adjustment up.

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.

setup 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.

single action press: any press with a single slide.

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.

single 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.

single cycle mechanism: preferred term is single stroke mechanism.

single cycle mode: preferred term is single stroke mode.

single end drive: a press with a crankshaft (or eccentric shaft) driven from one end.

single-piece frame: preferred term is one-piece frame.

single-point press: a press with force transmitted to the slide through one connection.

single stroke: preferred term is single cycle.

single stroke capability: preferred term is single cycle capability.

single stroke 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.

single stroke rate: preferred term is single trip rate.

single stroke reset: preferred term is antirepeat.

single trip rate: allowable single cycles per minute.

slide: the press member(s) that reciprocates linearly and to which the tooling is attached.

slide adjustment (1): on a mechanical power press, the distance the press shutheight can be reduced.

slide adjustment (2): on a mechanical power press, the mechanism for adjusting the press shutheight. NOTE: Slide adjustment mechanisms may be manually or power operated.

slide adjustment lock: the mechanism provided to prevent unintended change in the press shutheight.

slide counterbalance: preferred term is counterbalance.

slide face: the surface of the slide to which the punch or upper die is generally attached.

slide 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.

slide 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 separation.

sliding 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, sliding bolster is synonymous with moving bolster. Reference: moving bolster.

slow inch: preferred term is micro-inch.

solid frame: preferred term is one-piece frame.

spacer: a plate or fabrication installed between the die(s) and the slide to accommodate the press shutheight. Reference: riser.

SPM: 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.

spring cushion: a die cushion that uses springs to produce the counterforce.

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.

stay rod: a tie rod used on a gap frame press. Reference: tie rod.

stop (1): a cessation of movement, action, or operation.

stop (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 button. Reference: emergency stop; top stop.

stop 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.

stop-return 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 die space.

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 cycle; stroke length.

stroke length: the distance that the slide travels from the open to the closed position.

stroke position indicator: means to indicate press crank angle.

stroking selector: preferred term is mode selector.

surge tank: a reservoir provided in a pneumatic system to reduce pressure fluctuations in the operation of the system.

synchronous press line: a press production system with two or more presses and with automatic synchronized parts loaders, parts conveyance between presses, and parts unloaders.

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 components.

third action: preferred term is lower slide.

threading: 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).

throat 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.

tie rod frame: a straight side press frame made up of bed, crown, and uprights held together by prestressed tie rods.

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.

toggle 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 press.

tonnage curve: a graphical representation, based on drive torque, to show allowable press force as a function of slide positions during the working portion of the stroke.

tooling: a punch, die, shear, etc., used in a press for the manufacture of parts. Reference: die(s).

top clamping 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.

top drive press: any press with the drive mechanism above the slide.

top 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.

torque arm: the perpendicular distance from the center of rotation to the line of action of a force.

torque curve: preferred term is tonnage curve.

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 beam.

transfer 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) members.

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 beam.

trip: the momentary actuation of the press control to initiate a press cycle.

trip control: a mechanism for actuating a power press. Also used as a general term to describe any press actuating device.

triple action press: a multiple action press with three slides. Reference: multiple action press.

tripping: the actuation of press motion, using a trip control.

turnover bar: a bar used to manually turn the flywheel or crankshaft.

twin 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.

two-hand 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.

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.

two-hand 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 control.

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 trip.

two-point press: a press with the force transmitted to the slide through two connections.

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