Automatic turret lathe
AssigneeIndex-Werke Komm.-Ges. Hahn & Tessky
InventorsHelmut F. Link, Walter Grossmann
Life of this patent
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Abstract
NC automatic turret lathe with a tool turret, in which an auxiliary spindle is rotatably mounted. In order to position this auxiliary spindle with respect to its angle of rotation, an angle of rotation sensor device which controls a drive motor for the auxiliary spindle and an activatable locking device designed in the form of a freewheel are provided for the auxiliary spindle so that it may be positioned, with respect to its angle of rotation, accurately and free from play by reversing the auxiliary spindle drive motor once the locking device has been activated.
Claims6
An NC automatic turret lathe comprising a main spindle with a first chuck means rotatable about an axis of rotation;
- a first drive motor for driving said main spindle about said axis of rotation;
- a tool turret for machining a workpiece which is held in the first chuck means;
- a slide on which said turret is mounted for moving the tool turret along axes parallel and transverse to the axis of rotation of said main spindle;
- a second tool carrier having at least one tool receiving means;
- means for rotating each of said tool receiving means of said second tool carrier;
- said tool turret having a plurality of stations;
- at least one of said stations being equipped with an auxiliary spindle mounted on said turret for rotation about an auxiliary spindle axis in a forward and a reverse direction of rotation, and having a second chuck means;
- a second drive motor for driving said auxiliary spindle;
- sensor means for sensing the angle of rotation of the auxiliary spindle and operatively connected to and controlling said second drive motor;
- a rotatable locking device associated with said auxiliary spindle and comprising at least one stop surface corresponding to an angle of rotation of said auxiliary spindle and a reciprocally movable locking element disposed adjacent said stop surface for movement into an effective position in which it is in engagement with a stop surface of said locking device when urged in its reverse direction of rotation and locking said auxiliary spindle in a predetermined angular position;
- and means for actuating said locking element to move into engagement with a locking device stop surface and disposed in the path of movement of said tool turret;
- said locking device comprising a free-wheel mechanism in which said locking element is retained in engagement with a stop surface when it is in its effective position;
- said second drive motor comprising a reversible motor whereby the auxiliary spindle is fixedly angularly positioned by reversing said second drive motor for urging a desired stop surface of said locking device into engagement with said locking element after the locking element has been activated.
Dependencies are inferred from the claim text.