Abstract: A cushion pin pressure equalizing device that can absorb a variation in height of a plurality of cushion pins and control a die cushion load highly accurately, a die cushion device, and a cushion pin pressure equalizing method are provided. An initial pressure in ascending-side pressurizing chambers of a pressure equalizing hydraulic cylinder group for absorbing a variation in height of cushion pins is controlled so as to be an appropriate pressure. The variation in height of the plurality of cushion pins can be absorbed within a shortest stroke of a slide after the slide comes into collision with a cushion pad so as to equalize die cushion loads that are applied individually to the cushion pins and a target die cushion load can be generated within the shortest stroke of the slide, whereby a response to application of the die cushion load can be stabilized without excessive delay.

Abstract: A stamping press binder assembly for forming a finished stamped product from a blank includes an upper die for at least partially forming the finished stamped product, a stationary punch, an inner lower binder, and an outer lower binder. The inner and outer lower binders are both supported by a single cushion.

Abstract: Device and method for enabling independent tuning of frequency and amplitude of a reverse crankshaft motor. The reverse crankshaft motor provides periodic reciprocating motion based on periodic rotational motion from a rotational motor. The reverse crankshaft motor includes a crankshaft structure having first and second frames with a third axle arranged between them and connected to them by hinges. An amplituder is affixed to the third axle and may communicate with an external device. As the first and second frames move toward or apart from each other, the third axle moves radially toward or away from a central axis of the crankshaft structure. The position of the third axle determines the amplitude of the periodic reciprocating motion of the amplituder. By adjusting the position of the first and second frames, the operator may adjust the amplitude independently from the frequency of the periodic rotational motion supplied by the rotational motor.

Abstract: A tube splicing machine is provided which includes a frame on which a die holder is located. A swaging die is removably mounted in the die holder, and the die holder includes a main plate and a top plate that is removably connected to the main plate. A die holding opening is defined through a portion of the main plate and the top plate in which the swaging die is inserted. The swaging die includes two die parts that together define a die opening and are separable along a mid-line of the die opening. A splice fitting engagement plate with a splice fitting engagement portion is located on the frame, with the splice fitting engagement plate having an opening or an openable top to allow removable connection to a splice fitting. An actuator is connected between the splice fitting engagement plate and the die holder for moving the splice fitting engagement plate relative to the die holder from an initial position to a swaged position, in order to swage the splice fitting onto a length of hose or tubing.

Abstract: A method is provided for producing a laminar male die of the interchangeable type, for printing Braille characters on yielding supports. The method includes the step of punching the metal foil that forms the body of the male die to obtain a plurality of first points in relief on a first face of the foil. The first points define one or more characters in Braille alphabet. The method further includes punching the metal foil to obtain at least two second points in relief on the other side of the foil; the second points in relief are aligned with corresponding receiving seats of an outer male die-holding support. A male die obtained by the method and the respective manufacturing apparatus are also described.

Abstract: A connecting a remaining bar and a movable bar of a transfer bar includes a remaining-side clamp and a movable-side clamp. The clamps respectively have a male fitted portion and a female fitted portion that are fitted to one another around a connecting direction, defining a first connector. A male engagement portion and a female engagement portion are provided inside the clamps defining a second connector. The female engagement portion of the second connector includes a sphere in a form of a movable member moving in a direction orthogonal to the connecting direction. A movement of the sphere effects an engagement and disengagement of the female engagement portion from the male engagement portion.

Abstract: In a press working apparatus, while a servo motor is acting, an upper die is made to come close to a lower die and press working of the first time is conducted on a steel plate. A slider is raised to a movable punch preparation position. A movable punch is protruded from a die face of the upper die by width and locked by a mechanical lock. The upper die is made to come close to the lower die again and the steel plate is pushed with the upper die and at the same time an additional worked portion is pushed and deformed with the movable punch so as to conduct press working of the second time. After the movable punch has been retracted, the slider is raised.

Abstract: The invention provides a mechanical press apparatus for both single and double uses which can press mold a large-sized blank at a high pressure by employing a single action use aspect while being of a double action type. In a mechanical press apparatus provided with a drive portion (14) which moves upward and downward an outer slide (8) and an inner slide (9) arranged in an inner side of the outer slide at a predetermined timing, an elevating plate (10) is fixed to a lower end surface of the outer slide (8) so as to oppose to a lower surface of the inner slide (9), and the lower surface is provided with an upper die (7) and a lower die (3) positioned at a lower surface thereof so as to press. Further, an upper surface portion of the elevating plate (10) is provided with a first hydraulic cylinder (11) contracted by a pressing force at a time when the inner slide (9) moves downward.

Abstract: A dimpling device is provided with a slide rod, a first workpiece holder, and a second workpiece holder. The slide rod is slidably fitted around a center pin running through rivet holes. The first workpiece holder is slidably and detachably fitted around the slide rod. The second workpiece holder is detachably fixed to the center pin. The first and second workpiece holders have holding surfaces with curvatures that have been preselected to conform to the curvatures of the surfaces of workpieces. The slide rod has a punch and the second workpiece holder has a die. When the workpieces are held together by the holding surfaces, a nut is rotated to move the punch into a cooperative relationship with the die, thereby dimpling the surroundings of the rivet holes.

Abstract: A double-acting or single-acting mechanical forging press has an eccentric drive acting on the entire ram or an outer ram member and a toggle mechanism which acts on an inner ram, e.g. via removable pins so that, when the pins are removed, the toggle mechanism is decoupled from the inner ram member.

Abstract: A machine for corrugating a metal foil strip includes a form gear having identical cavities along its perimeter that is driven intermittently by an electronically controlled rotary servomotor to index successive cavities to a forming station. During each dwell of the form gear, a form tooth of a punch unit at the forming station is driven by an electronically-controlled linear servomotor into the cavity to at least partly form a corrugation in the strip. During each operating stroke of the punch unit, a hold finger clamps the immediately outgoing node of the corrugation that just left the forming station against the immediately outgoing tooth of the form gear, thus preventing any part of the outgoing corrugation from being pulled back into the cavity and ensuring that the next corrugation is formed solely from a segment drawn in from the incoming foil.

Abstract: A high precision, all-purpose, double action hydraulic press, which can control the speed, position, and parallelism of each slide, can conduct mold exchanges easily, and prevent the breakthrough phenomenon is provided with an outer slide 4, an inner slide 6, drive cylinders 8 and 9 which drive each of the slides, position detection devices 14 and 15 which detect the position of each of the slides, push pins 13, a damper cylinder 10 which prevents breakthrough phenomenon, and a die plate 5 which is equipped with push pins 13. By controlling the flow in the hydraulic pressure circuit which is connected to each of the drive cylinders, the speed, position, and parallelism of each of the slides are controlled.

Abstract: A noise-reducing structure of a processing machine reduces the noise generated when a movable member of the processing machine abuts against a workpiece located on a workpiece holder of the processing machine. The processing machine may be a drawing die including a punch, a blank holder fitted around the punch and vertically movably supported by a cushion pin, and a vertically movable die disposed to face the punch. The workpiece may be a thin plate which is placed on the blank holder. As the die is lowered, the thin plate is sandwiched between the blank holder and the die for drawing the thin plate by the punch. A lower die base plate is provided with a pivotable lever member for pushing the blank holder so that the blank holder begins movement before the die collides against the thin plate. An operation cam for driving the lever member is disposed at a position on the die facing the lever member, and the die collides against the thin plate on the blank holder after the blank holder is in motion.

Abstract: A silent structure for a drawing die, includes: a punch, a blank holder vertically movably supported by a cushion pin fitted over the punch, and a die disposed such as to oppose to the punch for moving the die up and down, in which a thin plate lifted by the cushion pin is placed on the blank holder, and the die is lowered to clamp the thin plate by the blank holder and the die, thereby drawing the thin plate, wherein a sub-blank holder is disposed between the cushion pin and the blank holder, a resilient material is interposed between the sub-blank holder and the blank holder, a run-up clearance is provided between the sub-blank holder and the blank holder, a run-up lever is rotatably mounted to the sub-blank holder for pressing the blank holder to allow the blank holder to run up before the die collides against the thin plate on the blank holder, an operation cam for driving the run-up lever is disposed on the die at a location thereof opposed to the run-up lever, and the die collides against the thin plate

Abstract: A hydraulic actuator including a single cylinder body which defined therein a pressure chamber in which a first piston with a piston rod and a second piston with a piston rod are independently movably inserted, a first working member secured to the first piston rod, a second working member secured to the second piston rod, and pressurized fluid inlet and outlet ports provided in the cylinder body to be connected to the pressure chamber.

Abstract: A press installation that has working stages with a press frame having press supports, a press bed, a headpiece, and turnbuckles which rigidly connect the press supports, the press bed, and the headpiece with one another. The press installation has a slide for forming that extends along a plurality of the working stages, a transfer device that transfers workpieces between the working stages, and driving devices that drive the slide and the transfer device. Connecting rods link the slide without pressure points and therefore directly in four linking points. The centers of the two linking points respectively of one side of the slide and of two turnbuckles situated opposite one another in the press frame are arranged on a common line which is aligned horizontally and vertically with respect to a press passage. The slide is an outer slide, while inner slides are provided in the working stages, these inner slides being vertically slidably disposed via guides.

Abstract: A double action mechanical press, especially for cupping operations in which an outer slide is provided within which an inner slide is reciprocally mounted on a common crankshaft. According to the present invention, a single dynamic balancer, out of phase from both the inner and outer slides, is provided on the crankshaft in order to counterbalance the inertial forces generated by the inner and outer slides during press operation.

Abstract: A double action mechanical press, especially for cupping operations in which an outer slide is provided within which an inner slide is reciprocally mounted on a common crankshaft. According to the present invention, a single dynamic balancer, out of phase from both the inner and outer slides, is provided on the crankshaft in order to counterbalance the inertial forces generated by the inner and outer slides during press operation.

Abstract: In conventional fabrication manufacture the thickness of the steel plates are often determined by the metal section required at the weld joints. The subject apparatus and method overcomes this problem by selectively forming a thickened edge along the edge of a thinner steel plate which can now be limited to the thickness required to withstand the stresses on the fabrication. The thickened edge is produced by passing a plate supported on a table through a forming apparatus having a forming roller. The table is movable in an oblique direction relative to the plate so that the shape of the thickened edge may be varied. The forming apparatus and table are automatically controlled to produce a thickened edge of a desired shape intermittently or continuously along a linear or non-linear edge of the plate.

Abstract: Apparatus for forming can blanks into elongated can bodies comprising a support structure having first and second gears rotatably mounted on the support structure and drive means for rotating the first and second gears so that the second gear rotates in a direction opposite to the direction of rotation of the first gear. A redraw assembly and can forming and ironing dies located adjacent to the support structure. A ram mounted on the support structure for reciprocating linear movement with portions thereof passing through the redraw assembly and the can forming and ironing dies. Connecting the ram to the first and second gears so that rotation of the first and second gears reciprocates the ram. In one embodiment, the ram does not rotate during the reciprocation thereof but in another embodiment the ram rotates during the reciprocation thereof.

Abstract: A metalworking press for forming easy open can ends. The metalworking press includes a primary ram for suspending an upper tooling member and designed to vertically reciprocate; a primary press bed stationarily positioned beneath the primary ram for mounting a lower tooling member; a seconary ram positioned beneath the primary press bed for suspending another tooling member and designed to vertically reciprocate; a secondary press bed stationarily positioned beneath the secondary ram for mounting another lower tooling member; driving rods secured to the primary ram and the secondary ram so that the rams move in unison; and a device to vertically reciprocate the primary ram so that when the device moves the primary ram downwardly the secondary ram moves downwardly, and when the device moves said primary ram upwardly, the secondary ram moves upwardly.

Abstract: A method of controlling a press having a slide mechanism mounted for reciprocating movement, a press drive for cycling the slide mechanism and including a press drive shaft and a mechanism for driving the shaft at a controllable angular velocity, and an automated feed mechanism for transferring workpieces in and out of at least one work station in the press in synchronism with the reciprocating movement of the press slide, the method comprising the steps of driving the press drive shaft at a first, relatively fast angular velocity during a "closed" portion of each cycle of reciprocating movement of the press slide, the "closed" portion of each cycle including that portion of the cycle during which the press slide is working one or more workpieces, and driving the press drive shaft at a second angular velocity, slower than the first angular velocity, during an "open" portion of each cycle of reciprocating movement of the press slide, the second angular velocity being sufficiently slow to allow the automatic fe

Abstract: A system for the automatic adjustment of the pressure pad holding force in accordance with the thickness of the workpiece and the forming tool stroke includes a force transducer and a displacement transducer. The force transducer is used to monitor the force between the pressure pad and the workpiece. The output of the displacement transducer is continually read as the part is being formed. The workpiece thickness and forming tool stroke are used to calculate the optimum holding force. The pressure of a fluid system is adjusted to change the holding force to the optimum value.

Abstract: Blanks of noncircular, especially polygonal (e.g. heptagonal), outline are fed to a die-stamping press of an embossing plant such as a mint by means of a turntable with radially oriented transport plates projecting beyond its periphery at angularly equispaced locations. Each transport plate has an outwardly open recess with inner edges conforming to part of the blank outline and with two substantially parallel jaws spaced apart by the maximum width of the blanks, the depth of the recess being less than this maximum width to let an inserted blank protrude by one corner in an incorrect position and by two corners but to a lesser extent in a correct position.

Abstract: A rotary transfer press comprising a bed; an upright extending upward from the bed; a crown mounted on the upright and providing a plurality of stations between the crown and the bed in an annular arrangement; a slide upwardly and downwardly movable by being guided by the upright; a feed bar having clamps corresponding in number to the number of the stations and provided around the upright for transferring workpieces from station to station in succession; a slide drive disposed in the crown for moving the slide upward and downward and comprising a main shaft coupled to a main electric motor to rotate at a reduced speed, eccentric rings coupled to the main shaft to rotate at a reduced speed and connecting rods connecting the eccentric rings to the slide; a feed bar lifting drive having a lift cam coupled to one of the eccentric rings and adapted to be actuated by the lift cam for moving the feed bar upward and downward; a feed bar feeding-drive having a feed cam coupled to one of the eccentric rings and adapte

Abstract: Press apparatus including a blank holding ram and a drawing ram which are reciprocally driven such that the holding ram can hold a blank of material while the drawing ram moves relatively to the holding ram to perform a drawing operation on the blank. Stops are provided for limiting the movement of the holding ram with pressure fluid cushions being arranged in the drive train for the holding ram so as to accommodate a dwell phase with the holding rams against the stops during the drawing operation.

Abstract: A machine for producing tubular fastener sealing members having rolled ends includes an apertured guide member cutting block backed by a pair of clamp members and which feeds tubular stock of resilient material between the clamp members through the guide block. A rotating knife is associated with the guide block and an axially reciprocating rotating shaft supports an edge rolling tool confronting and coaxial with the guide aperture. The components are motivated and sequenced to open the clamp until the tube is advanced to the tool, close the clamp, advance the tool to roll the tube leading edge, open the clamp and retract the tool which is followed by the tube, close the clamp, further retract the tool, and slice the finished product from the tube stock.