Ott-jakob Spanntechnik Gmbh

Ott-jakob Gmbh & Co. Spanntechnik Kg

Ott Maschinentechnik Gmbh

Peter Mohr

Josef Greif

Bartholomäus Reisacher

Wolfgang Bechteler

Conrad Rösch

Stephan Gast

Helmut Heel

Stefan Bonerz

Franz Friedl

Hans Kettel

Manfred Fauter

Hans Leidl

Bartholomäus Reisacher Jun

Stefan Hartmann

Bartholomäus Jun Reisacher

A clamping device for clamping a workpiece or a tool or, more specifically, a tool holding fixture in a machine part of a machine tool includes a tension rod slidably mounted within the machine part; a clamping set movable by the tension rod between clamped and released positions; a tension spring dedicated to the tension rod so as to generate the pull-in force of the clamping set; and a release mechanism, by which the clamping set can be moved against the force of the tension spring into the released position by the tension rod. To make possible effective clamping at optimum force, the tension spring is clamped between first and second rod parts of the tension rod. The second rod part can move relative to the first rod part, and, as the clamping set moves into the released position, is compressed on both ends by the release mechanism by moving the two rod parts in opposite directions.

Clamping device and machining unit comprising such a clamping device

A clamping device for clamping a workpiece or a tool or a tool holder to a machine component of a machine tool, having an axially movable tension rod, a clamping assembly which can be moved by the tension rod between a clamped position and a released position, a spring assembly dedicated to the tension rod with a plurality of series-connected spring units for generating the clamping and draw-in force of the clamping assembly, and a releasing unit by which the clamping assembly can be moved by the tension rod against the force of the spring assembly into the released position. To ensure the most uniform load possible, the axial spring deflection of the spring units is limited by a stop when the spring assembly is compressed.

Clamping device

A clamping device for clamping a workpiece or a tool or a tool holder to a machine component of a machine tool, including an axially movable tension rod, a clamping assembly which can be moved by the tension rod between a clamped position and a released position, a spring assembly dedicated to the tension rod for generating the clamping and draw-in force of the clamping assembly, and a releasing unit by which the clamping assembly can be moved by the tension rod against the force of the spring assembly into the released position. The spring assembly has a minimum of one spring unit with a plurality of flexible spring members disposed between a first and a second spring holder, with the first and second spring holders being secured against torsion relative to the tension rod.

The invention relates to a clamping device for removably mounting a tool () or a tool fixture in a receiving part (). Said clamping device comprises several pincers elements () which are concentrically arranged around a central axis () within the receiving part () and are impinged upon by a tension spring () so as to be moved into a clamping position in order to brace the tool () or the tool fixture. In order to be able to automatically replace a tool without using much force and energy, an axially movable closing element () is assigned to the pincers elements (). Said closing element () impinges the pincers elements () in a forward position that is advanced in the direction of the pincers elements () for mounting purposes in the clamping position thereof, which is swiveled inward by means of the tension spring (), while being movable into a retracted position with the aid of a detaching device () in order to release the pincers elements ().

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.

A clamping device for gripping a tool in a carrier. The clamping device has a hollow centering extension or spigot and an abutment surface surrounding it are provided on the tool. A tool receptacle provided in the carrier has a receiving bore matched to the centering extension and an end face surrounding the bore and against which the abutment surface can be pressed by a clamping arrangement. The clamping arrangement comprises a clamping sleeve movable coaxially with respect to the central axis and a clamping ring or collet movable in the opposite direction to the clamping sleeve, both of which are provided with clamping cones facing towards one another. The collet is movable axially on the clamping sleeve by means of a clamping nut screwable on the sleeve. A plurality of clamping jaws surround the clamping sleeve and the collet concentrically and are supported in each case by one end against their clamping cones. The clamping jaws have at their two ends clamping surfaces which cooperate with a conical surface of the tool receptacle and with a conical surface oppositely directed with respect to that conical surface in the centering extension.

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Wiggensbach, Germany

Peter Mohr