Ott-jakob Spanntechnik Gmbh

Ott-jakob Gmbh & Co. Spanntechnik Kg

Saw Components Dresden Gmbh

Wolfgang Bechteler

Josef Greif

Stefan Bonerz

Stephan Gast

Peter Mohr

Conrad Rösch

Florian Merz

Ludwig Jakob

Bartholomäus Reisacher

Hans Leidl

Florian Aschauer

Maximilian Horn

Bartholomäus Reisacher Jun

Gerd Neugebauer

Heiko Wittek

Steffen Zietzschmann

Stefan Weixler

Winfried Hörger

In a device for recording deformation of a rotor head of a work spindle, at least one magnet is arranged on a stator or a rotor of the spindle, the magnetic field of which penetrates a measurement section of the rotor head, which is traversed by an axial flow of force during clamping of a tool or tool carrier on the rotor head by a tool clamping device arranged in the rotor. The rotor head has a magnetizability or magnetization that varies in the axial direction in its measurement section, and at least one direction-sensitive magnetic field sensor is arranged on the stator radially opposite the measurement section, which is connected to an evaluation device to determine axial deformation of the rotor head as a function of rotation angle from the strength of the magnetic field as a function of rotation angle recorded by the sensor during one revolution of the rotor.

Device and method for monitoring a work spindle

A tool or workpiece holder with a receiving body and a clamping device for clamping a tool or a workpiece in a receiving opening of the receiving body. The clamping device comprises a first clamping element, which can be moved in a receiving portion of the receiving body at right angles to a central axis of the receiving opening, and a second clamping element, which can be moved relative to the first clamping element at right angles to the central axis of the receiving opening by means of an actuating element. The second clamping element has conical bottom clamping surfaces on the two clamping elements for inserting the tool or workpiece into the receiving opening. An ejecting mechanism is disposed on the first clamping element for ejecting the tool or workpiece from the receiving opening when the clamping elements are moved into a disengaged position.

Tool or workpiece holder

A method of monitoring a tool clamping device mounted on a machine spindle, the clamping force of which tool clamping device is generated by a spring assembly which exerts a force in the direction of the clamping position on an actuating element actuating the clamping or the release of a tool or tool holder. In the method, the spring force and the displacement of the actuating element are continuously measured during the release and/or clamping of a tool or tool holder and recorded as functions of the time. These recorded functions are used to identify at least one parameter characteristic for the status of the tool clamping device. Based on the spring force and the displacement over time, a spring characteristic curve is plotted in the form of the spring force as a function of displacement, the analysis of which spring characteristic curve provides information about a number of characteristic parameters.

Method of monitoring a tool clamping device

In a device for protecting a work spindle () that is rotatably supported in a spindle head (A,B) of a processing machine and/or a tool () clamped in the work spindle () from collisions with obstacles in the processing chamber () of the processing machine, a plurality of distance sensor modules () are arranged on or in a spindle nose (B) that forms the termination of the spindle head (A,B) toward the processing chamber () such that they point toward the processing chamber () and are connected to a common signal processing unit (). When an obstacle is present in a predetermined area of the processing chamber (), this signal processing unit generates a warning signal based on the measuring signals delivered by the individual distance sensor modules (). An output () of the signal processing unit, at which the warning signal is generated, is connected to the machine control () of the processing machine. The distance sensor modules () preferably consist of radar or ultrasonic sensor modules.

Device for protecting a work spindle

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

In a device for monitoring the position of a tool or machine element on or in a work spindle or tool chuck, in particular, in a machining apparatus, the work spindle or tool chuck has at least one channel that defines a waveguide, which is suitable for propagating electromagnetic waves, that leads from an external surface of the work spindle or tool chuck to the tool or machine element. At least one radar system is provided and arranged outside the work spindle or tool chuck in such a manner that it is capable of irradiating a radar signal from the outer surface into the channel and or receiving a radar signal reflected back from the channel. The radar signal is connected to a signal-processing device that determines a measure of the position of the tool or machine element relative to the work spindle or tool chuck based on at least one radar signal irradiated into the channel and reflected back from the channel.

Device for monitoring the position of a tool or machine element

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 invention pertains to a chuck for detachable connection of two machine parts, with a chuck assembly arranged on or in a first machine part and a cooperating complementary part on or in a second machine part. The chuck assembly contains an axially displaceable tensioning element and several gripper elements associated with the tensioning element and radially movable by axial displacement of the latter, with a clamping surface for contact with a corresponding opposing surface of the complementary part. In order to allow a subsequent alignment or adjustment of the chucked machine part, the complementary part contains an outer part, an intermediate part arranged in the outer part, and an inner part arranged in the intermediate part, which are connected to one another by flexible outer and inner webs and are otherwise separated by outer and inner gaps. The intermediate and inner parts are adjustable in different directions relative to the outer part.

Chuck

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

The invention relates to a clamping device for clamping a tool (), or tool holder in a working spindle (), in particular, of a machine tool, comprising a drawbar (), arranged to be displaced within the working spindle (), a clamping set (), arranged in the working spindle () and displaceable between a clamping position and a released position by means of the drawbar (), a spring arrangement () provided for the drawbar () to generate the drawing force for the clamping set () and a releasing unit (), by means of which the clamping set () may be moved into the released position by the drawbar () against the force of the spring arrangement (). According to the invention, a simplified operation of the clamping device may be achieved, whereby the releasing unit () may be operated by an electrical actuator ().

A rotary feed-through, which contains a hollow shaft, which is supported in a first housing part so that it can rotate, with a first sealing surface and a sealing bushing, which is arranged rotationally fixed within a second housing part and which is coaxial with the hollow shaft, with a second sealing surface for contact to the first sealing surface. In order to also enable lower leakage losses, in addition to less wear, with the supply of cooling lubricants and compressed air, the second housing part contains a first lateral supply channel, which can be attached to a coolant supply line or a compressed air supply line, for the supply of cooling lubricant or compressed air via at least one radial opening of the sealing bushing and a second supply channel, which is charged during the supply of cooling lubricant, for the supply of cooling lubricant to a pressure piston, which closes the rear end of the sealing bushing, to increase the contact pressure of the sealing surfaces.

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Biessenhofen, Germany

Wolfgang Bechteler