Patents Assigned to Werkzeugmaschinenfabrik Adolf Waldrich Coburg GmbH & Co.
  • Patent number: 4620824
    Abstract: A high-speed driving adapter for boring, milling and similar machine tools has a gear housing fixedly connected to a spindle housing of the machine tool. The gear housing rotatably supports a drive shaft having a taper shank disposed in a conical receiving bore in the machine tool spindle. A bearing sleeve is secured to the drive shaft and a tool-receiving spindle is rotatably supported therein and has a conical receiving bore coaxial with the drive shaft for the taper shank of a tool. A sun-and-planet gear arrangement is provided between the drive shaft and tool-receiving spindle. A collet carrier having a center ejecting pin and a collet is axially movable in a coaxial bore in the tool-receiving spindle, the collet having claws which engage an annular groove at an end of the tool taper shank. Several cup springs are arranged concentrically with respect to the collet carrier and urge the collet carrier away from the receiving bore.
    Type: Grant
    Filed: January 8, 1985
    Date of Patent: November 4, 1986
    Assignee: Werkzeugmaschinenfabrik Adolf Waldrich Coburg GmbH & Co.
    Inventors: Rolf Eckstein, Siegfried Buhl, Juergen Krumm
  • Patent number: 4614468
    Abstract: For facilitating the rotating of a tool-receiving device, in particular an angled milling head, an elongated bushing which is concentric with respect to the milling spindle axis is secured in the milling spindle carriage. The bushing has at its free (lower) end a conical receiving opening. A support sleeve is rotatably supported in the bushing by means of radial and axial bearings. The support sleeve has at its free (lower) end a fastening flange for the tool-receiving device. Above the fastening flange is provided a centering cone conforming in shape to and fitting into the conical receiving opening. An oil film is interpositioned between the opening and the centering cone to provide a uniform support for the support sleeve. The milling spindle is supported in the support sleeve. By means of a ring gear, which is driven by a servomotor, it is possible to rotate the tool-receiving device about the axis of the milling spindle into predetermined angular positions.
    Type: Grant
    Filed: December 12, 1984
    Date of Patent: September 30, 1986
    Assignee: Werkzeugmaschinenfabrik Adolf Waldrich Coburg GmbH & Co.
    Inventors: Otto Waldrich, Rolf Eckstein
  • Patent number: 4602874
    Abstract: In a support for a machine tool spindle (1) adapted for use with a cooling device there are provided feed and discharge channels (12, 13) for a fluidic cooling system in the spindle (1). These channels are connected to cooling grooves (14), which at least in the region of the inner bearing rings (2a) are arranged on the spindle head (1a), are worked into the spindle outer surface (1b) extending in a peripheral direction or helically and are open toward the inner bearing rings (2a).
    Type: Grant
    Filed: November 4, 1985
    Date of Patent: July 29, 1986
    Assignee: Werkzeugmaschinenfabrik Adolf Waldrich Coburg GmbH & Co.
    Inventor: Heinz Neugebauer
  • Patent number: 4560310
    Abstract: A tool holder for boring, milling and the like machine tools has a conical shaft with a support member arranged coaxially on said conical shaft. The conical shaft fits into a conical first receiving bore of the machine tool spindle. The support member has a second conical receiving bore for the conical shaft of a tool. The second conical receiving bore is coaxial with the tool holder conical shaft and is smaller than the first receiving bore of the spindle. The tool holder conical shaft has a coaxial bore, in which is axially movable a collet carrier with a collet. The ends of the collet are constructed as claws and engage an annular groove at the free end of the tool conical shaft. Several axially acting cup-spring packages are arranged in the support member concentrically with respect to the second conical receiving bore. The cup-spring packages act onto the collet carrier through several radially extending support arms for clamping the tool conical shaft in the tool holder.
    Type: Grant
    Filed: February 16, 1984
    Date of Patent: December 24, 1985
    Assignee: Werkzeugmaschinenfabrik Adolf Waldrich Coburg GmbH & Co.
    Inventors: Rolf Eckstein, Ralf Dechert
  • Patent number: 4412766
    Abstract: An apparatus for chucking and releasing a conical shank of a tool or an additional aggregate on tool machines, particularly drilling and milling machines. The apparatus has a hollow spindle which is supported in a spindle housing and has at its lower end which faces the conical shank a receiving cone for the shank. A draw rod is supported for axial movement limited by a lower and an upper stop, is rotatably movable in the spindle, has at its end which faces the shank threads which can be screwed into threads on the shank, and is connected at its upper end to a drive motor rotor so as to be fixed against rotation but axially movable with respect thereto. Both stops are provided on a sleeve which concentrically surrounds the draw rod. The sleeve is supported on a spring arrangement. It is movable axially downwardly with respect to the spindle under the action of a hydraulically operated piston against the chucking force of the spring arrangement in a direction toward the receiving cone.
    Type: Grant
    Filed: December 10, 1980
    Date of Patent: November 1, 1983
    Assignee: Werkzeugmaschinenfabrik Adolf Waldrich Coburg GmbH & Co.
    Inventor: Rolf Eckstein
  • Patent number: 4384432
    Abstract: A device for automatically limiting the steplessly adjustable speed of a drive motor for the spindle of a grinding machine to a speed which is the maximum permissible motor speed for the grinding wheel currently being used has a motor-driven speed regulator which, upon a stopping of the spindle, returns automatically to an initial position corresponding to the lowest permissible motor speed and has exchangeable protective hoods associated with respective grinding wheel diameters and types which can be releasably secured on the grinding spindle housing. Each protective hood, with the exception of the protective hood for the grinding wheel with the lowest maximum permissible speed, has associated with it a receptacle with several contacts which, depending on the maximum permissible speed for the associated grinding wheel, has two contacts connected by an electrical bridge.
    Type: Grant
    Filed: May 18, 1981
    Date of Patent: May 24, 1983
    Assignee: Werkzeugmaschinenfabrik Adolf Waldrich Coburg GmbH & Co.
    Inventor: Heinz Gerner
  • Patent number: 4384811
    Abstract: An apparatus for centering and indexing of milling machine parts, in particular angle milling heads on a spindle carriage of a milling machine. Cooperating indexing elements are arranged on the angle milling head and on the spindle carriage, which elements are simultaneously also the centering elements. These are constructed as four similarly constructed aligning units which are arranged offset to one another each at 90.degree. in peripheral direction. Each aligning unit consists of an aligning tab arranged on the one milling machine part, preferably the angle milling head and a fixing piece provided on the other milling machine part and has a groove therein. The angle milling head can be fixed in predetermined angular positions relative to the spindle carriage through the aligning units.
    Type: Grant
    Filed: December 3, 1980
    Date of Patent: May 24, 1983
    Assignee: Werkzeugmaschinenfabrik Adolf Waldrich Coburg GmbH & Co.
    Inventors: Rolf Eckstein, Horst Schramm