Abstract: A press drive mechanism is disclosed which is comprised of a drive shaft having a first eccentric which receives a power link member. The power link member has an end connected to the press slide by means of a connecting link, and the power link member also includes a second eccentric having an axis parallel to and offset from both the drive shaft and first eccentric axes. A rocker link member is received on the second eccentric and has an end pivotally connected to the press frame. The rocker link constrains oscillating movement of the power link member in response to rotation of the drive shaft, thus to control the displacement and velocity characteristics of the reciprocating movement imparted to the press slide.

Abstract: A machine for forging the leading end of a metal screw blank comprising two pairs of complementary dies, one die of each pair of which is stationary and the other movable to and from the stationary die. The stationary dies are supported on opposite sides of a stationary die support and the movable dies on discrete movable die supports at opposite sides of the stationary die support. The movable die supports are connected to form a movable die assembly, are supported by linear ball bearings on cylindrical ways and are reciprocated as a unit by a pitman connected to a crankshaft by roller bearings, thus providing for the production of a forged blank upon each 180.degree. rotation of the crankshaft. The movable die supports are adjustable relative to the stationary die support and the roller bearings have preload adjustments that make it possible to maintain a precise clearance between the respective dies of each pair in their closed position within one hundred twenty seven thousandths of a millimeter (0.

Abstract: A sound abatement device for large mechanical presses of the type which employ large gears and operate at relatively high speeds. The device is especially adapted to reduce noises emanating from the enclosed crown of such presses where the press gearing, drive means and bearings are located, and, to this end, the device desirably is positioned in openings in the base of the enclosed crown through which the pitmans or connecting links for moving the slide or ram of the press extend, and through which the crown generated noises normally are released. The device, while being positioned in the openings through which the pitmans or connecting links extend, does not interfere with, or impede, the vertical and oscillating movements thereof.

Abstract: A transfer press is disclosed including a bed, at least two slides, uprights and a crown. Driving means for the slides are accommodated within a plurality of driving chambers. Connecting rods are inserted within said uprights for tightly connecting said driving chambers with said bed. Each slide is actuated by a pair of connecting rods positioned diagonally adjacent to both ends thereof between forward and rearward members of the uprights for achieving uniform distribution of urging forces.

Abstract: A press brake having improved ram leveling adjustment is disclosed. The press brake is preferably one having a hydraulic-mechanical power actuator for advancing and returning the ram. The power actuator includes a pair of bell cranks pivotally supported on an upright frame by a pair of horizontally spaced pivots, a hydraulic piston and cylinder motor for oscillating one of the bell cranks, and a link connecting like arms of the bell crank for causing parallel motion of the bell cranks. Leveling adjustment of the ram is obtained by providing horizontally spaced parallel links which are independently adjustable in length to interconnect the ram and second like arms of the bell cranks. An independently controlled reversible motor is operatively associated with each adjustable link for selectively lengthening or shortening the link, and an indicator is associated with each link to indicate position adjustment of each link.

Abstract: A control circuit for automatically counterbalancing the moving components of a mechanical power press. The counterbalance circuit is responsive to the current drawn by the press motor to regulate air pressure in a cylinder attached to the press ram. On the press downstroke, air pressure in the cylinder is decreased only if the press is over counterbalanced and on the press upstroke, air pressure in the cylinder is increased only if the press is under counterbalanced.

Abstract: Forming apparatus such as a press which includes a support or base having a bed which carries a crosshead mechanism. The crosshead mechanism is movable for reciprocation with respect to the bed in order to bring together co-operating parts of the form or press tooling respectively carried by the bed and crosshead mechanism. The crosshead mechanism is guided for such reciprocation relative to the support structure by a linear hydrostatic bearing mechanism and is driven by a pair of connecting rods coupled to corresponding spaced apart and axially aligned crankpins of a single crankshaft. Rotary hydrostatic bearing mechanisms are provided at both ends of the connecting rod for coupling it to the crankshaft and to the crosshead mechanism. The coupling of each connecting rod to its crankpin of the crankshaft is preferably accomplished through a bush mounted about a crankpin which in turn is mounted on the crankshaft.

Abstract: A fluid-mechanical drive for a press brake incudes two lever members, pivotally connected between their opposite ends to two corresponding end frame members of the press brake. A pair of hydraulic cylinders pivotally connect one end of each lever member to the upper blade at spaced positions,. The opposite end of each lever member is mechanically connected to the upper blade so that upon simultaneous extension of the two fluid cylinders, a direct downward force is applied to the upper blade at two spaced positions along the blade by such cylinders and a downward reaction force is applied through the lever members and mechanical means to the upper blade at two other spaced positions along the blade to drive such blade downwardly through its working stroke into coaction with a lower blade. In one embodiment, the mechanical means are link members, each pivoted at one end to the upper blade and at the other end to a lever member.

Abstract: A unitary coining die assembly is provided which is mountable on the frame of an underdriven coining press independent of the press slide. The die assembly is positioned on the frame above the slide and is comprised of a mounting plate attached to the frame and a pair of support plates suspended therebeneath. An upper coining die is carried by the mounting plate, and a vertically displaceable lower coining die is carried by the lower support plate. A ring providing a die cavity cooperable with the coining dies is carried by the upper support plate. The support arrangement provides for the lower coining die to be pivotal laterally about an axis spaced from the die axis to facilitate access to the component parts. Further, the portion of the upper support plate is pivotal about the same axis to provide access to the die cavity ring and upper coining die.

Abstract: This invention provides a method and device for eliminating vibration and for silencing noise caused during operation of a crank-driven press tool. A brake operates on the crank shaft of the press tool from just before to just after the termination of the press stroke, thereby preventing the kinetic energy of the mechanical components and metal mold from being reduced instantaneously to zero and thus preventing the generation of vibration and noise usually occurring during press work in a crank-driven press tool.

Abstract: A press for the non-cutting shaping of sheet metal and similar materials comprises a closed frame which is connected at the end to the press plunger guided for vertical movement and the frame being connected at its opposite end at respective corners to cranks which are rotatable in respective opposite directions. In addition the frame side adjacent the rotating cranks is guided by rollers engaged against respective opposite sides of a fixed guide.

Abstract: Piece working machine for the production of such elements as punches, steel types and the like, including a support member for a matrix having a shaped recess and/or a shaped projection for the piece working, and comprising means for causing a relative oscillatory motion between said matrix and piece in the course of working, whereas the piece is pressed against the matrix, the latter being conveniently shaped with a proper contour to afford the desired working.

Abstract: The invention is intended for crank presses. The drive according to the invention, comprises a first flywheel installed on a crankshaft connected to a slide block and a second flywheel connected to the crankshaft by means of a clutch. The first flywheel is rotated by means of a motor. Gyratory mass of the flywheel is selected to be such that kinetic energy of the flywheel accumulated by it in the course of its acceleration would be fully spent by it in carrying out the technological operation and in returning the slide block to the initial position. The driving motor may be represented by one or several synchronously operating hydraulic motors or electric motors disposed over a circumference concentric with the flywheel and connected to the latter by means of gear trains of similar gear ratio.

Abstract: The forging press has a horizontal drive shaft on which is carried an eccentric body linked to a vertical force-transmitting block whose lower surface lies at an angle to the horizontal and flushly engages the top of a horizontally reciprocal wedge whose bottom surface lies on the hammer. Interfitting ridges and grooves interconnect the wedge, the force-transmission block, and the hammer so that the hammer hangs from the wedge and the wedge from the force-transmission block. A spindle threaded into the wedge is rotatable to establish its horizontal position, and, therefore, to set the relative position of the force-transmission block in the hammer. At its other end this spindle is provided with a piston reciprocal in a horizontally extending hydraulic chamber which is maintained under a predetermined pressure. The threshold at which the wedge may slip to the side and protect the hammer from overloading is established by the pressure in this hydraulic cylinder.

Abstract: Pipe pincer mechanism for connection to and disconnection from a machine such as a back hoe for rapid shut down of a pipeline that has developed a break or leak. After the leak has been located and a hole or trench excavated to expose the break, the pincer mechanism is attached to the back hoe boom and one of the machine's hydraulic cylinders and then is used to crimp the pipe on both sides of the leak to shut off the escape of gas or liquid through the break.