Abstract: A method for warping the machine bed of a punching press, which machine bed has an aperture for carrying away punching parts and rubbish, compensates at least partially for a bending of the machine bed caused by the punching force during the punching operation. Thereby, forces acting transverse to the punching direction are introduced into the machine bed and/or forces acting transverse to the punching force direction are produced inside the machine bed, by means of which the machine bed warps in the direction towards the press ram and indeed such that it warps stronger in the area adjacent to the aperture than in the areas adjacent to its longitudinal sides. By the method, apertured machine beds of punching presses can, with very little expenses on the equipment side, be spatially pre-deformed in order to compensate at least partially bendings caused by punching forces.

Abstract: The invention relates to a punching press with a clamping plate (27) and with a press ram (1) which lies opposite the upper side of the clamping plate (27) and operates towards the clamping plate (27) and is moveable up and down via four tension columns (2) by means of a crank drive arranged below the belt movement plane (X) of the punching press. The press ram (1) is guided exclusively via the tension columns (2) which, in turn, are guided in inclination-tolerant guides (3) in the belt movement plane (X) in such a manner that the press ram (1) and the tension columns (2) can be positioned obliquely as a consequence of differing longitudinal expansion of the tension columns (2) under an eccentric load by the tension columns (2) being inclined about axes of inclination running in the region of the belt movement plane (X) of the punching press.

Abstract: The invention relates to a gear train unit comprising a plurality of planetary gear train stages, which are connected one after the other and which each comprise a ring gear (4, 4a, 4b), a sun gear (2a, 21, 21a) and a plurality of planet gears (3, 3a, 3b) supported on a planet carrier (5, 5a, 6), wherein the sun (2a, 21, 21a) of each following planetary gear train stage is formed by the planet gear carrier (5, 5a) of the preceding planetary gear train stage. The gear train unit comprises a drive element (2), which forms the sun gear (2a) of the first planetary gear train stage, and an output element (17), which is connected in a torsionally rigid manner to the planet gear carrier (6) of the last planetary gear train stage. The gear train unit can be shifted in such a way that either a first or a second gear ratio can be set.

Abstract: The invention relates to an advancing apparatus for the intermittent supply of a semi-finished material (22) in the form of a band to a press. The apparatus comprises a pair of displacement grippers (4, 7) which run forwards and backwards and by which the material (22) is advanced in an advancing phase, a stationary pair of clamping grippers (24, 27) by which the material (22) is held in a fixed manner in a non-advancing phase, and a control rocker (12) with a control drive (40, 42) which is coupled to one control end of the latter and to which the pair of displacement grippers (4, 7) and the pair of clamping grippers (24, 27) are coupled mechanically and their interaction is controlled.

Abstract: The invention concerns a multistage press, at which within the machine-mounted clamping plate (1), an insert (3) is arranged which can alternatingly be moved in the direction towards the press plunger (2) and away from it. The insert (3) is moved up and down by a cam drive actuated by the press main drive with lifting and lowering cams (5), whose cam tracks (8a, 8b) are traced by lifting rollers (6) and lowering rollers (7) under compressive prestress. Such a multistage press can be operated with a high number of strokes per minute and has, at the same time, an excellent precision of the stroke movement.

Abstract: A feed apparatus for intermittently feeding band-shaped material to a press has two feed rollers for advancing the material. An upper feed roller is bearing-mounted in a rocker for swivel-movement with a pivot bearing on a unidirectionally hydraulic cylinder into a high-lifted position enabling introduction of the material between the rollers. For lowering of the upper roller, the cylinder is rendered pressureless and a press spring pressed onto the material between the rollers. In this position, the pivot bearing can be fixed for automatically adjusting the feed apparatus to the thickness of the material.

Abstract: A adjusting nut is arranged on a threaded spindle. The adjusting nut supports a first double arm lever unit with a first and a second arm. A second double arm lever unit is pivotally mounted at its first arm through a connecting strip to the second arm of the first double arm unit. The second arm of the second double arm unit is pivotally mounted through a control rod unit to a rocker. This rocker supports a upper feeding roller which co-operates with a lower feeding roller for a feeding of a strip shaped blank. The first arm of the first double arm unit supports a bolt which projects into a elongate hole of a eccentrically supported rod.

Abstract: The elongate rocker is forked at its first end and includes two fork tines. These are designed symmetrically relative to the longitudinal plane of symmetry of the rocker. A control rod with a longitudinal center axis is pivotally mounted at its bottom end to the second end of the rocker. A spiral pressing spring with a longitudinal center axis acts onto the rocker. The upper feeding roller is designed symmetrically to a plane extending perpendicularly relative to its longitudinal center axis. The longitudinal center axis of the control rod defines together with the longitudinal center axis of the pressing spring a geometrical plane. This plane coincides with the longitudinal plane of symmetry of the rocker, which in turn coincides with the geometrical plane which extends perpendicularly to the longitudinal center axis.

Abstract: An adjusting nut is arranged on a threaded spindle and supports a first double arm lever unit with a first and a second arm. A second double arm lever unit is pivotally mounted at its first arm through a connecting strip to the second arm of the first double arm unit. The second arm of the second double arm unit is pivotally mounted through a control rod unit to a rocker. This rocker supports upper feeding roller which co-operates with a lower feeding roller for a feeding of a strip shaped blank. The first arm of the first double arm unit supports a bolt which projects into an elongate hole of an eccentrically supported rod.

Abstract: Two intermittently and oscillating driven feeding rollers (2; 3) are adapted to feed a strip-shaped workpiece (63). The bottom feeding roller (2) is supported in the frame (1) of the feeding device. The upper feeding roller (3) is supported in a rocker (30). The movement of the rocker (30) is controlled by a control disk (64) through a lever and a rod arrangement (40). The rocker (30) rests at one end (33) via a pressure spring (39) against the frame (1). At the opposite end (34) the rocker (30) rest against the frame (1) via a further pressure spring (36). The rocker (30) is supported in an overhung state on a cantilever which consists of a sleeve (70), a arm (71) projecting laterally from the sleeve (70) and a shaft (72) held clamped in the arm (71). The clamping bar (46) is firmly mounted to the shaft (72).

Abstract: A first clamping member allocated to the feeding of the web co-operates with a second clamping member allocated to the feeding of the web in order to clamp the web for a feeding thereof. The first clamping member is controlled by a cam disk via lever arm members. A first arresting member co-operates with a second arresting member in order to clamp the web for an arresting thereof. The first arresting member is controlled from the same cam disk via lever control members.

Abstract: A connecting rod unit is eccentrically supported on the drive shaft. The connecting rod unit is pivotally mounted via link members to double arm levers. Each double arm lever is pivotally mounted to a single arm lever. Furthermore, each single arm lever is coupled at its end remote from the double arm levers to a device for the adjusting of the height position of the ram. Each single arm lever supports a pressing column. These pressing columns are pivotally mounted to the ram. Accordingly, the structural members which transmit the driving force from the connecting rod unit to the pressing columns can be designed extremely stiff and with a minimal springiness. Also, all structural members located between the connecting rod unit and the ram, inclusive the ram, are designed in such a manner that no additional balancing forces for the vertical mass force balancing are needed.

Abstract: A punch press having connecting rods which face away from each other are arranged on the eccentric shaft, and each connecting rod is coupled to a connecting lever. Two toggle joint mechanism units are connected to one connecting lever. Two further toggle joint mechanism units are connected to the other connecting lever extending in the opposite direction. The first named toggle joint mechanism units are connected via pressure columns to a first ram. The second named toggle joint mechanism units are connected via further pressure columns to a second ram. Due to the driving structural members which are arranged symmetrically distributed relative to the eccentric shaft of the punch press and the two rams arrived that thereby, the punch press can feature an extremely long space for receipt of the tools without that the height of the punch press, the allowable rated loading and the moving masses must be held overally large.

Abstract: The eccentric shaft is connected via the connecting rod and slider to single arm levers projecting at both sides away from the slider. At their ends remote from the slider the levers are supported via threaded spindles at the frame of the punch press. Groups of link members are pivotally mounted to the levers. These groups of link members are connected to double lever pairs arranged symmetrically relative to the center line of the frame of the press. Every double lever is pivotally mounted to a pressing column. The pressing columns of a respective pair of double levers are mounted to a relative ram. Each ram is guided by three guide columns, of which two are rigidly connected to a ram and one to the frame of the press. By the symmetrical dividing of the driving structures and the two rams derived therefrom the punch press is given an extremely long space for mounting the tools without that the height of the punch press, the allowable rated output and the moving masses must be kept overly large.

Abstract: The push rods (16, 17) are connected via ball-and-socket joints (42-45) to the ram (3). The sockets (44, 45) are located within the push rods (16, 17) and the balls (42, 43) are located above the ram (3) and mounted to same. Thus, in case of off center loadings of the ram (3) no bending moments are transmitted to the push rods (16, 17). The entire bottom side of the ram (3) is available for the receipt of connecting members for the mounting of a tool to the ram.

Abstract: When starting up the punch press its eccentric shaft must accelerate through a start-up angle from the resting state up to the operating speed of rotation due to the forces of inertia of the moving structures of the punch press. When stopping the punch press the eccentric shaft is rotated in the direction of normal operation into a position between the upper dead center and the lower dead center position, in which latter position no contacting between the upper tool and the metal strip to be worked upon takes place. From this position the eccentric shaft is rotated backwards by the start-up angle into a start-up angle position. In the start-up angle position again no contact between the upper tool and the strip takes place.

Abstract: An unwinding station in which a coil of band-like material is unwound with a vertical axis, i.e. lying in a horizontal plane, is provided for loading a processing machine with the band-like material from the coil. Consequently, the band taken off from it is in a vertical plane and, for insertion into a processing machine, must be turned in a turning zone. A centering device is provided for centering the band with respect to the central axis of the processing machine, in order to avoid internal stresses in the band before the band is turned.

Abstract: The supporting block for the focusing device of a laser welding apparatus is mounted onto the working surface of the body of the lower tool. The cutting edge of the die set into the body of the lower tool is aligned with the working surface. For a resharpening of the cutting edge the working surface is reground and accordingly also the area, on which the supporting block rests. Conclusively, no readjusting of the focusing device relative to the welding point at the die is necessary.

Abstract: For loading a processing machine with band-like material from a coil, a rotatable support, on which the coil rests with its axis substantially vertical, is driven by a motor. Since the circumference of the coil decreases during unwinding, a sensor is provided for controlling the motor to maintain a desired constant band speed.

Abstract: The lever of a mechanism for driving a sheet feeder is guided for linear longitudinal movement in a guide member. The guide member is supported rotatably in a bearing pedestal, which is height adjustable. The lower section of the lever is shaped as a hollow profile having inner sliding surfaces. A slide member is located at the sliding surfaces. The slide member receives a pivot, by which a shaft is driven oscillatingly. The slide member is located for longitudinal movement at the center axis of the lever and, accordingly, the lever is not subjected to any torsional loadings and the entire apparatus can be made relatively narrow. This decreases elongations during the operation of the apparatus considerably.