Abstract: A circuit or control arrangement for an adjusting drive of a press ram of a high-speed cutting press which includes top and bottom dies respectively attached to the press ram and a platen of the press with the top die being adapted to dip or penetrate during a cutting process into the bottom die. An arrangement is provided for maintaining the depth of penetration of the upper die means into the lower die means to a constant value in dependence upon an operating condition of the high-speed cutting press. The maintaining arrangement may include at least one limit switch operatively connected with an oscillator stage which provides adjusting signals to the drive motor. In lieu of a limit switch, a cutting force measuring sensor member may be interconnected with an evaluator circuit and the oscillator means so as to control the drive motor.

Abstract: Automatic sliding apparatus is provided for automatically stamping stator and rotor laminations for electric motors from workpiece blanks. To accommodate utilization of a plurality of sets of tool dies on a single driveable press ram, a tool changing device is provided which includes a tool holder guide track for movably guiding the tool holder along a straight guide path in a plane at a tangent to the workpieces to be machined. With the plurality of tool die sets mounted at the linearly guided tool holder, tool exchanges can be effected simply and automatically, utilizing a linear drive mechanism for moving the respective tool die sets along the frame of the tool holder.

Abstract: A clutch and brake device for presses, punches, or the like, wherein a drive shaft of the presses or punches may be connected selectively to a flywheel by way of a friction clutch and may be braked with respect to a frame of the press or punch by a friction brake. A bearing for the flywheel is provided at the frame on a tubular extension, with an end section of the drive shaft extending through the tubular extension. The friction clutch and friction brake are arranged on the end section of the drive shaft on a side facing away from the frame at a position beyond the bearing for the flywheel. The friction clutch engages at the flywheel by way of an annular support extending over the friction brake and attached to the flywheel. The friction brake is supported by way of a hollow support extended through the flywheel and encompassing the drive shaft.

Abstract: A drive arrangement for a high speed mechanical press, especially a high speed cutting press, wherein the press drive includes two eccentric shafts connected by connecting rods with a slide. Mass balancing weights are provided for enabling a complete dynamic mass balancing, with the weights being articulated by additional rods and being moved in a direction opposite to the slide. The drive further includes at least three pairs of toggle or knee joint link arrangements, with the first arrangement being nearly horizontally disposed, the second arrangement being nearly vertically disposed, and the third arrangement being nearly vertically disposed and connected on the one hand with the slide and, on the other hand, with the mass balancing weights, with the pairs being arranged symmetrically with respect to the eccentric shafts.

Abstract: In conventional methods for welding can bodies along their longitudinal seams, high frequency substantially rectangular a.c. currents are used for the welding current to avoid the problem of arcing found in d.c. welders. However, the high frequency a.c. current causes an undesirable degree of heating which produces eddy currents and necessitates cooling equipment. To overcome this problem, a method of producing can bodies welded along their longitudinal seam is provided in which the length of a half wave of the substantially rectangular welding current is matched in length and concurrent with the amount of time required for a can body to pass between the welding electrodes.

Abstract: A method and apparatus for producing pressed parts from round stock such as steel wire wound on a reel, which comprises unwinding the wire from the reel, passing the wire through a straightening device, and then feeding the wire intermittently through a heater where it is heated to a temperature of between 600.degree. C. and 850.degree. C. and subsequently cut to the appropriate length and fed to a press where it is pressed to the appropriate shape.

Abstract: In control drives for high speed blanking presses, a serious problem of excessive tool wear arises from increases in the immersion depth of a top tool into its associated bottom tool when the stroke frequency increases. To overcome this, a control drive is provided wherein the top tool is held at a substantially constant immersion depth in the opening in the bottom tool over the entire stroke frequency range of the press. A measuring instrument detects the stroke frequency. This detected frequency is fed into a control circuit programmed with a characteristic corresponding to either immersion depth or ram adjustment as a function of stroke frequency. The output of the control circuit is a control signal coupled to a drive motor to maintain the constant immersion depth.

Abstract: A circuit or control arrangement for an adjusting drive of a press ram of a high-speed cutting press which includes top and bottom dies respectively attached to the press ram and a platen of the press with the top die being adapted to dip or penetrate during a cutting process into the bottom die. An arrangement is provided for maintaining the depth of penetration of the upper die means into the lower die means at a constant value in dependence upon an operating condition of the high-speed cutting press. The maintaining arrangement may include at least one limit switch operatively connected with an oscillator stage which provides adjusting signals to the drive motor. In lieu of a limit switch, a cutting force measuring sensor member may be interconnected with an evaluator circuit and the oscillator means so as to control the drive motor.

Abstract: In loading a press, it is desirable to provide a loading device which can be driven independently of the main driving means of the press and which causes a minimum of surface damage to the blanks being loaded into the press. To achieve this, gripper elements are provided which are coupled to adjustable drive systems controlled by a numerical control unit. The gripper elements are capable of motion in at least two planes perpendicular to each other to remove devices from the stack and carry them along a preselected path into a tool chamber of the press.

Abstract: In unloading a press, it is desirable to provide automatic unloading without the need for operators, even in situations requiring a definite stacking order in containers located next to the press. To achieve this automatic unloading, extraction grippers and a carrier frame are provided which can be moved in three directions which are at right angles to each other by servo drives controlled by a continuous-path numerical control unit.

Abstract: An automatic numerically controlled slotting or notching press arrangement which includes a multi-armed feed and removing device having a turnstile or turntable which is selectively indexed or rotated so as to convey blanks to various processing stations. The feeding and removing device is adapted to transfer the blanks from at least one stack unloading station to a centering or aligning station, a locating or turning station, a processing station, a stator stacking station, and a rotor stacking station. A numerically controlled indexing unit (a clamping table for blanks to be processed) and a numerically controlled tool changing is provided. The stack unloading station and the rotor stacking station form the first and last processing stations and are linked by a conveying device which operates independently of the turnstile or turntable of the feeding and removing device.

Abstract: In automated systems such as press lines or related systems, a control circuit is typically designed to be intrinsically safe in acting on actuators which trigger movements of the presses. The actuators and/or the power amplifiers preceding them are connected to a load voltage supply circuit. In order to prevent unplanned movements during setting-up operations, when the safety circuits are partially disabled, which movements could be caused by a failure (e.g. fusing of a semiconductor component), the actuators and/or the power amplifiers preceding them are driven by the control circuit and are connected to the load voltage supply circuit by means of control keys, which trigger planned movements, via at least one zero-voltage-protected switching element.

Abstract: A protective arrangement for a drawing press which includes a detector arrangement for detecting at least one of a presence of a workpiece, a semi-finished workpiece, and a correct workpiece feed whereby the drawing press is immobilized or shut down in the event the detector arrangement detects a fault. The detector arrangement is adapted to detect contours of a workpiece which have been drawn by the drawing press and is disposed downstream of a drawing station of the drawing press.

Abstract: In automated press systems it is desirable to be able to control the actuators of an automation system associated with the press based on the speed of the press. To accomplish this, a circuit arrangement is provided which includes a pulse generator for producing a coded signal indicating the position of the press based on a press speed signal. An evaluation circuit having a parallel arrangement of a converter and a process control circuit receives these coded position signals. The outputs of the converter and process control circuit control the actuators of the automation system through pulse converters and positioning control circuits (e.g. speed and position control loops). Information as to the number of press strokes is also provided to the pulse converters through a generator. The converter can be an electronic curve shaper which controls the actuators when the press ram is moving, while the process control circuit can be a CNC control circuit which controls the actuators when the press ram is stopped.

Abstract: Beading apparatus is provided for producing a bead on the periphery of a hollow cylinder, such as a cam body. A rotatable inner ring and a rotatable outer ring co-act to deform a portion of the hollow cylinder therebetween to form a bead. To accommodate a firm backing of the exterior of the hollow cylinder during beading operations, while also permitting the removal of a beaded hollow cylinder from the apparatus, a depressor is provided which is formed as a basket with springing tongues separated by axially extending slots. A tapered cylinder liner is provided for forcing the springing tongues to a smaller diameter configuration to provide backing for the hollow cylinder during beading operations, with the springing tongues being movable to a larger diameter to permit removal of the hollow cylinder subsequent to beading operations.

Abstract: An apparatus for the intermittent feeding of web-type or strip-type material by means of feed roll into an operating chamber of a press. The feed rolls are driven by a main press drive through a mechanical connection and a feed gear mechanism. A scrap cutter is provided which can be driven in correspondence with the operating cycle of the press. The mechanical connection can be selectively severed or interrupted with an auxiliary drive mechanism being provided which is adapted to be connected to the apparatus. The scrap cutter may be driven by a separate drive mechanism in correspondence with the cycle of the feed gear mechanism.

Abstract: In press line operations, a workpiece conveyor device is necessary to carry workpieces from one press to another. Preferably, this conveyor should be readily removable for repairs, adaptable to a large number of presses, and readily reprogrammable to adapt to a variety of workpieces. To achieve this, a conveyor is provided having a cross member mounted on a movable carriage which moves along a track on a frame bridging the intermediate space between two presses. Horizontal movement of the carriage along the track, vertical movement of the cross member on the carriage, and movement of a positioning device for the workpieces is provided by setting drives controlled by a continuous-path numerical control unit. For repairs, the entire frame can be moved out of the intermediate space in a direction at a right angle to the direction of workpiece travel.

Abstract: An arrangement for an intermittent operation in a notching machine which includes a ram driven by way of a crank or eccentric drive which ram is articulated to a toggle joint. The notching machine has an operating cycle which consists of alternatingly successive notching and notch-free steps which is attainable by means of a cylinder-piston unit activatable pneumatically or hydraulically which unit is in operative connection with an eccentric supported on a pin with the eccentric being the central fulcrum of the toggle joint. A second toggle joint with a counterbalancing mass is diametrically opposed to the ram with the second toggle joint being articulated to the eccentric. The central pivot as well as the points of articulation of the toggle joints to the ram and counterbalancing mass are disposed substantially in one plane.

Abstract: An arrangement for notching or slotting circular blanks so as to produce stacks of rotor and/or stator laminations for electric machines. At least one slotting machine is provided which in a first direction is adjustable radially with respect to a spatially fixed axis of rotation of a blank support table by way of a separate adjusting drive. The support table for the blanks, constructed as an indexing apparatus, may be driven by a numerically controlled adjusting drive. The at least one slotting machine is movable in a second direction at right angles to the first direction by way of a further adjusting drive. The stacks of lamination produced by the punching arrangement may include spiral slots or notches as well as oblique slots or notches enabling the production of special motors having a cone or tapered armature.

Abstract: An arrangement for feeding, stacking and packaging plate-like members punched by the die of a press of the type wherein the plate-like members are carried away initially vertically and then along a curve away from the vicinity of the press by guideways is formed of dispensers from which connecting material is fed over connecting devices adjacent the guideways into engagement with the punched members. According to preferred embodiments, the connecting material is provided with adhesive on one side, the connecting devices are spring-biased rollers, and a packet height marking mechanism is provided.