Ott-jakob Spanntechnik Gmbh

Ott-jakob Gmbh & Co. Spanntechnik Kg

Stephan Gast

Wolfgang Bechteler

Peter Mohr

Josef Greif

Conrad Rösch

Stefan Bonerz

Florian Merz

Hans Leidl

Gerd Neugebauer

Winfried Hörger

Markus Fuhrmann

In the case of a tool clamping device, in particular, for an operating spindle of a processing machine, with an activation element () that can be moved by a drive between a first position, in which the tool clamping device is located in a clamped position, and a second position, in which the tool clamping device is located in a released position, a sensor is present in the form of at least one electrical component for detecting a position of the activation element (). The sensor is integrated structurally into the tool clamping device and at least one section of the activation element () directly forms a component of the one or more electrical components, wherein its position influences an electrical property of this component. The component can be an electrical switch whose closed state depends on the position of the activation element () in that at least one section of the activation element () is electrically conductive and forms a contact electrode of the switch or a part of such an electrode. However, it could also be a capacitor or an inductor.

Tool clamping device

The invention pertains to a rotary feed-through for supplying a fluid to a rotating machine part with a hollow shaft () that is rotatably supported in a housing () and has a first sliding surface (), with a sealing bushing () that is arranged in a rotationally fixed fashion within the housing () coaxial to the shaft () and has a second sliding surface () for contacting the first sliding surface (), and with a collecting chamber () that is arranged within the housing () and serves for collecting the leakage fluid escaping between the two sliding surfaces (). The leakage fluid collected within the rotary feed-through can be monitored with the aid of a detection channel () in the housing () that is connected to the collecting chamber () and contains a leakage sensor ().

Rotary feed-through with leakage sensor

The subject matter of the present invention relates to a clamping device for clamping a tool or a tool holder () in a machine spindle (), comprising a drawbar () that can axially move back and forth between a clamping position and a release position, a clamping spring () for actuating the drawbar () in the direction of the clamping position, a minimum of one sensor () for monitoring the clamping force, and a clamping cone () having a plurality of clamping elements () that rest against its outside surface, which clamping elements, via the axial movement of the clamping cone () by means of the drawbar (), can be moved back and forth between a clamping position in which the tool or tool holder () is retained and a release position in which the tool or tool holder () is released. To make possible an easy and reliable transmission of the measured data acquired by the sensor throughout the operating range of the clamping device, a transponder assembly () with a stationary stator ring () and a rotor ring () that can be axially moved by the lifting movement of the drawbar () within the stator ring () is dedicated to the sensor () for the wireless transmission of data and energy.

Clamping device

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Schwabsoien, Germany

Stephan Gast