Patents Assigned to GFM Holding Aktiengesellschaft
  • Patent number: 5894755
    Abstract: A forging machine (1) comprises at least two forging punches (5) acting against each other and longitudinally guided in a machine frame (2), which each have separate stroke drives (9) and stroke position adjusting means (10). To make the forging machine (1) suitable for a large forging range with a simple design, each forging punch (5) together with longitudinal guideway (8) and stroke position adjusting means (10) and the associated stroke drive (9) are combined to a forging unit (3) and disposed in a separate housing (7), which is pivotally or movably mounted in the machine frame (2) and for adjustment is supported on an actuator (11).
    Type: Grant
    Filed: September 16, 1997
    Date of Patent: April 20, 1999
    Assignee: GFM Holding Aktiengesellschaft
    Inventors: Alfred Seeber, Rupert Wieser
  • Patent number: 5857378
    Abstract: For controlling the stroke frequency of a forging machine (1), which comprises a mechanical stroke drive (3) for the stroke movement of the forging punch (2) and a hydraulic drive connection (4) between stroke drive (3) and forging punch (2), the rotational speed of the stroke drive (3) is adjusted to a high stroke frequency of the forging punch (2), and for reducing the stroke frequency the hydraulic pressure of the drive connection (4) is decreased for periodically succeeding drive strokes in accordance with the drive-related increase with constant rotational speed of the drive (3), while at the same time the forging punch (2) is preferably blocked in the vicinity of the upper dead center. For this purpose, the drive connection (4) is connected to an accumulator (20) via a control valve (23) to be actuated in dependence on the stroke movement.
    Type: Grant
    Filed: September 16, 1997
    Date of Patent: January 12, 1999
    Assignee: GFM Holding Aktiengesellschaft
    Inventors: Alfred Seeber, Rupert Wieser
  • Patent number: 5064130
    Abstract: A cutting plant for cutting blanks out of a starting strip comprises a cutting deck, which has a top surface to which a vacuum is applied, a cutting carriage, which is movable over the top surface and is provided with a cutting tool that is adjustable to cut to a defined depth. The plant also comprises a dispenser rotatably mounting a supply roll of the starting strip to be dispensed onto the top surface and a take-up device rotatably mounting a take-up roll. To permit an efficient cutting operation, the dispenser comprises a brake for braking the starting strip between the supply roll and the cutting deck and the take-up device has a drive for intermittently driving the take-up roll under the control of a measuring device for measuring the length of processed material which is to be taken up.
    Type: Grant
    Filed: October 5, 1989
    Date of Patent: November 12, 1991
    Assignee: GFM Holding Aktiengesellschaft
    Inventors: Gottfried Blaimschein, Robert A. Postier, D. L. Pilkington