Patents Assigned to Forkardt Spanntechnik AG
  • Clamping device for a machine tool
    Patent number: 5954320
    Abstract: The clamping device has two jaws between which a workpiece to be machined is immobilized on the table of a machine tool. Each jaw is supported by a carriage, and the carriages are coupled so as to move in a mirror symmetric fashion with respect to a plane orthogonal to the path of the carriages and at rest relative to the device. This avoids adding up tolerances of the shape of the workpiece with tolerance in the position of the clamping device relative to the machining tools.
    Type: Grant
    Filed: August 29, 1997
    Date of Patent: September 21, 1999
    Assignee: Forkardt Spanntechnik AG
    Inventor: Erwin Bohler
  • Method for fixing a clamping attachment on a workpiece and device for implementing the method
    Patent number: 5951025
    Abstract: The method uses the actuating mechanism of the chuck of a machine tool for turning or grinding in order to pre-tension the radially acting springs of a clamping attachment by means of the jaws of the chuck. When the pre-tension is released, the springs maintain the clamping attachment on a workpiece that is mounted between centers in order to be machined. The method allows to perform automatic machining cycles on a workpiece mounted between centers, without the necessity to use a compensated chuck.
    Type: Grant
    Filed: January 7, 1997
    Date of Patent: September 14, 1999
    Assignee: Forkardt Spanntechnik AG
    Inventor: Erwin Bohler