Patents Assigned to L. Schuler GmbH
  • Patent number: 5595111
    Abstract: A transfer press or similar press installation is provided with a press frame including press supports, a press bed, and headpieces, these press parts being rigidly connected with one another by turnbuckles. The press installation includes slides and a transfer device, which are movable by driving devices. Longitudinal traverses are provided which extend along the length of at least the working stages. The press supports are arranged in front of and behind the working stages, and the longitudinal traverses are placed on these press supports. The longitudinal traverses are provided with guides which interact with guides mounted on the slides for the bearing of the slides which move up and down. As a result, a stable and cost-effective construction of the press installation is achieved while supports in the central working areas are omitted.
    Type: Grant
    Filed: June 24, 1993
    Date of Patent: January 21, 1997
    Assignee: L. Schuler GmbH
    Inventors: Wolfgang Michael, Kurt Strommer, Hans Hofele
  • Patent number: 5582063
    Abstract: A multistand press or similar press facility for the forming of sheet metal parts, is provided with bedplate, press stand and several press slides driven by the press drive for tool top parts interacting with tool bottom parts. Gearings for deflecting the rotating movement of the motor drive into the upward and downward movement of the press slides are arranged between press stands which each form a pair of stands, and are disposed opposite one another, and above the introduction of force into the press slides. Two gearings are provided for the respective pair of stands of two press slides. This make it possible to drive the press slides assigned to a pair of press stands from one press stand area.
    Type: Grant
    Filed: July 7, 1994
    Date of Patent: December 10, 1996
    Assignee: L. Schuler GmbH
    Inventors: Hans Hofele, Wolfgang Michael, Hermann Braun, Franz Schneider
  • Patent number: 5566814
    Abstract: A press, multistation press or similar forming machine, avoids space problems when a sheet bar loader is used in the inserting area of the press as a result of the movements of the transport rails in three axes. The length which is the result of the length of the transfer movement of the transport rails and the required length of the guiding devices on these rails is included in the length of the press-side guides on which the areas of the transport rails which are away from the driving area for the transfer movement are disposed in the direction of the transfer movement.
    Type: Grant
    Filed: October 4, 1994
    Date of Patent: October 22, 1996
    Assignee: L. Schuler GmbH
    Inventor: Hans Hofele
  • Patent number: 5496124
    Abstract: A tensioning assembly having a cylindrical exterior circumferential surface of a drivable shaft section and an interior cone ring having a cylindrical interior circumferential surface arranged on the cylindrical exterior circumferential surface, the interior cone ring having a conical exterior circumferential surface. An exterior cone ring is arranged on the conical exterior circumferential surface of the interior cone ring, the exterior cone ring having tensioning screws which are coaxial with respect to the drivable shaft section and by which the interior and exterior cone rings are tensioned with one another and the interior cone ring is tensioned with the drivable shaft section.
    Type: Grant
    Filed: June 28, 1994
    Date of Patent: March 5, 1996
    Assignee: L. Schuler GmbH
    Inventors: Alfred Bareis, Wilfried Abt, Rudolf Augst, Robert Czapka, Horst Pfisterer
  • Patent number: 5429473
    Abstract: A mechanism for removing double parts from the last machining stage of a press includes telescopically slidable pipes. In order to house the supporting elements of a supporting device, which are used for the support of sheet metal parts in areas situated away from the gripper rails and in the center with respect to the gripper rails, the telescopically slidable pipes are connected between the gripper rails. The pipes extend in the direction of the opening and closing movement of the gripper rails and, in the area situated in the center with respect to the gripper rails carry a bushing. The center position of the bushing is caused by stand-side guiding devices. The bushing is provided with the supporting elements which in the last machining stage of the press support the separated sheet metal parts.
    Type: Grant
    Filed: December 15, 1992
    Date of Patent: July 4, 1995
    Assignee: L. Schuler GmbH
    Inventors: Sieghard Muller, Gerald Mikusch
  • Patent number: 5388952
    Abstract: An arrangement for transferring sheet metal parts in a press installation, in which the sheet metal parts must be rotated with respect to their position in the next working stage. In addition, a collision between the sheet metal part and the tool during the transfer movement is avoided. During the transfer movement, the sheet metal parts are held on one traverse respectively which, on the end side, is disposed in bearing devices to be rotatable about an axis of rotation, and can be rotatably acted upon by a servomotor, a pressure cylinder or similar adjusting devices, such as a cam, and movement transmission devices.
    Type: Grant
    Filed: October 18, 1993
    Date of Patent: February 14, 1995
    Assignee: L. Schuler GmbH
    Inventors: Hans Hofele, Karl Thudium
  • Patent number: 5385040
    Abstract: A transfer device in a press line has traverses which are situated transversely with respect to the workpiece passage and can be adjusted in the horizontal and vertical direction, and which support sheet metal parts placed on them. The traverses are fastened on toothed belts are movable in guide strips on deflecting rollers by servomotors.
    Type: Grant
    Filed: November 5, 1993
    Date of Patent: January 31, 1995
    Assignee: L. Schuler GmbH
    Inventors: Wolfgang Michael, Karl Thudium, Hans Hofele, Walter Rieger, Peter Klemm, Burkhardt Schumann
  • Patent number: 5383348
    Abstract: In a press, an individual press, a multistage press, a multistand press and similar forming facilities, transfer devices are provided for the transport of sheet metal parts in the machining stages. These transfer devices have guide strips which can be lifted and lowered in vertical guides on the press stands via adjusting devices. In each guide strip, toothed belts are arranged which are guided on deflecting rollers. The moving drive in the horizontal direction takes place from a motor-transmission device. As a result, a reduction of the mass of the movable structural members of the transfer device is achieved while the construction of the transfer device is modular.
    Type: Grant
    Filed: November 5, 1993
    Date of Patent: January 24, 1995
    Assignee: L. Schuler GmbH
    Inventors: Wolfgang Michael, Karl Thudium, Peter Klemm, Burkhardt Schumann, Hans Hofele, Walter Rieger
  • Patent number: 5375513
    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.
    Type: Grant
    Filed: June 24, 1993
    Date of Patent: December 27, 1994
    Assignee: L. Schuler GmbH
    Inventors: Wolfgang Michael, Kurt Strommer
  • Patent number: 5363683
    Abstract: A transfer press or similar forming machine is provided with a transfer device having holding devices for the gripping and transport of sheet metal parts. During the transfer movement of the sheet metal parts from one machining stage to the next, the sheet metal parts are deposited intermediately on an intermediate depositing device. The intermediate depositing device takes over a partial path of the transfer so that the movement of the holding devices is less than half the distance between the machining stages.
    Type: Grant
    Filed: November 5, 1993
    Date of Patent: November 15, 1994
    Assignee: L. Schuler GmbH
    Inventors: Karl Thudium, Walter Rieger
  • Patent number: 5363684
    Abstract: In order to reduce the transfer times of sheet metal parts in a press installation, the fastening point of the devices holding the sheet metal parts can be adjusted on a running carriage, which can be driven horizontally in a running rail, in the direction of the travel movement by an adjusting device.
    Type: Grant
    Filed: November 5, 1993
    Date of Patent: November 15, 1994
    Assignee: L. Schuler GmbH
    Inventors: Karl Thudium, Andreas Dangelmayr, Walter Rieger
  • Patent number: 5357844
    Abstract: A run-up control for the pressure cheek in a drawing apparatus achieves stoppage times during the run-up phase by having a pressure cylinder with first and second pressure spaces as well as a control piston which is fixed in its position in the control cylinder when the second pressure space is acted upon with pressure. The control piston is fixed in its position by a piston rod, a fixed stop and an adjustable stop. The first pressure space is in a continuous flow connection with a mash pressure space which is reduced when the pressure cheek runs up so that the volume of the second pressure space determines the point in time of the stoppage time in the run-up phase of the pressure cheek.
    Type: Grant
    Filed: April 1, 1993
    Date of Patent: October 25, 1994
    Assignee: L. Schuler GmbH
    Inventor: Siegfried Baur
  • Patent number: 5347840
    Abstract: A materials press comprising a press table and a sliding table. The contact surfaces between the press table and the sliding table have surface contours which conform to a bending line which would occur in a planar press table when it is placed under a load.
    Type: Grant
    Filed: August 17, 1992
    Date of Patent: September 20, 1994
    Assignee: L. Schuler GmbH
    Inventors: Michael Wolfgang, Lauke Andreas, Fritz Werner
  • Patent number: 5307728
    Abstract: A control arrangement for regulating the speed of a pressure cylinder increases the controllable flow volume through a proportional-action (control) valve, while avoiding a larger valve or two valves of the same type that must be connected in parallel. A control valve is used which has at least two flow paths connected in parallel. At least one controllable valve is connected in series with a first of the flow paths for the blocking or release of the delivery pipe. The connected first flow path and the controllable valve are connected in parallel to the second flow path.
    Type: Grant
    Filed: September 2, 1992
    Date of Patent: May 3, 1994
    Assignee: L. Schuler GmbH
    Inventor: Siegfried Baur
  • Patent number: 5307709
    Abstract: An arrangement on a press having an eccentric shaft for adjusting the strokes of a working slide and of a counter-oscillating weight by adjustable eccentric/eccentric bush pairings. The eccentric bushes of these pairings can be detached and fixed on the eccentrics in the rotating direction since the connection is in each case an interference fit with a cylindrical locating surface that can be released by the feeding of pressure oil. This permits a narrow construction of the press with a relatively short eccentric shaft. The eccentrics are arranged directly next to one another on an eccentric shaft, and the eccentric bushes are rotationally connected with one another via radial disks with radial slots and pins engaging in them. The adjusting of the strokes takes place by rotating the eccentric shaft when the interference fits are released and the eccentric bushes are locked.
    Type: Grant
    Filed: October 1, 1992
    Date of Patent: May 3, 1994
    Assignee: L. Schuler GmbH
    Inventors: Alfred Bareis, Reinhard Braun
  • Patent number: 5241849
    Abstract: A drawing apparatus pressure pins acting upon the metal sheet holder in the bottom part of the tool are selected, has additional pressure cylinders fastened in the pressure cheek between the actual drawing apparatus acting upon a pressure cheek and the pressure pins. These additional pressure cylinders are individually controllable via valves from a pressure pipe. As a result, a precise influence is made on the drawing conditions of various sheet metal parts and their ejector movement from the bottom part of the tool.
    Type: Grant
    Filed: April 14, 1992
    Date of Patent: September 7, 1993
    Assignee: L. Schuler GmbH
    Inventor: Siegfried Baur
  • Patent number: 5242357
    Abstract: A method and apparatus for changing dies on a moving bolster for a press including a control circuit in combination with a cam-actuated deceleration valve. A cam is located at a predetermined location along a path for the moving bolster. Upon reaching the cam location when the bolster is moving toward or away from the press, the deceleration valve is actuated to inhibit and shut off a flow of air to air-operated motors on the bolster. Thereupon, the bolster moves to a stop at a predetermined location relative to the press.
    Type: Grant
    Filed: October 10, 1991
    Date of Patent: September 7, 1993
    Assignee: L. Schuler GmbH
    Inventor: Peter Kerr
  • Patent number: 5067892
    Abstract: A device for ejecting a workpiece from a die having a two-armed ejector lever, the drive-side arm of which can be driven by driving rods. The ejector-side arm acts upon an ejector slide. The ejector lever is adjustable for changing the ejector lift. In order to integrate the compensation for different ejection lengths into the ejector lever, the working plane on the drive side and the take-off plane on the ejector side are to be arranged in parallel to the adjustability of the ejector lever. On the other hand, the ejector lever must have a different width in the area between the take-off plane and the bearing which supports the ejector lever during the forming, for projections of different lengths at the workpieces. The width is obtained from the distance of the take-off plane in ejector position of the ejector lever from the bearing minus the length of the ejector lift in this position.
    Type: Grant
    Filed: February 22, 1990
    Date of Patent: November 26, 1991
    Assignee: L. Schuler GmbH
    Inventors: Oskar Rahn, Gunter Riedisser
  • Patent number: 5048318
    Abstract: An intermediate depositing station between machining stages of a metal forming machine, having templates for supporting a sheet metal part from below which are adjustable in height, distance and oblique position relative to another sheet metal part. The intermediate depositing station has a mounting plate that is displaceable in a first horizontal direction with respect to a foundation. A first adjusting device is coupled to the mounting plate and is operable to displace the mounting plate horizontally. A carriage plate is coupled to the mounting plate and is displaceable in a second horizontal direction that is transverse to the first horizontal direction. A second adjusting device is coupled to the carriage plate and is operable to displace the carriage plate horizontally. A console is coupled vertically on the carriage plate. A third adjusting device is coupled to the console and is operable to lift and lower the console.
    Type: Grant
    Filed: September 12, 1990
    Date of Patent: September 17, 1991
    Assignee: L. Schuler GmbH
    Inventors: Karl Thudium, Walter Rieger
  • Patent number: 5031439
    Abstract: A drive for a male-mold-site ejector slidably disposed in a slide of a mechanical metal-forming press has an angle lever pivoted in the slide. One leg of the angle lever act upon the end of the ejector facing away from the male mold and the other leg of the angle lever is in driving connection with a guide rod which is linked to a driving connecting rod for the slide. In a timed manner, the guide rod transmits driving movements to the angle lever. The driving connection is constructed as a link chain, in which the guide rod linked to the driving connecting rod is disposed approximately at a right angle to the moving direction of the slide and the arm of a two-armed lever linked to it extends approximately in parallel to the moving direction of the slide.
    Type: Grant
    Filed: April 11, 1990
    Date of Patent: July 16, 1991
    Assignee: L. Schuler GmbH
    Inventors: Gunter Riedisser, Oswald Barodte