A machine tool includes a machine control unit to output control signals to drives for machine elements. A tool which machines a workpiece is thereby moved relative to the workpiece in a position-controlled manner. Arranged in a first region of one machine element is an active vibration damper to damp vibration in a second region of the machine elements as the workpiece is machined by the tool. In order to detect the vibration, a first sensor is arranged in the first region of the machine element and a second sensor is arranged on another machine element or in a different region of the one machine element. Actual values detected by the first and second sensors and corresponding target values are supplied to a dual controller which determines on the basis of these values, a resulting manipulated variable for the active vibration damper and actuates the active vibration damper accordingly.

The present disclosure relates to an apparatus for use in a gear cutting machine for the gear-coupled manufacture or machining of workpieces having at least one machine table at which a workpiece spindle is arranged for holding a clamping apparatus for a workpiece, and having at least one tool spindle for holding a machining tool, wherein the tool spindle is equipped with an integrated balancing system for balancing the tool. In accordance with the present disclosure, a further independent balancing system for the workpiece spindle is integrated in addition to the balancing system in the tool spindle.

A tool arrangement containing a tool holder and a tool having a tool head for processing workpieces and a shaft supporting the tool head, wherein the tool holder and the shaft each have a planar surface oriented transversely with respect to the axial direction of the tool holder and the shaft, the planar surfaces lying opposite one another. The tool holder and the shaft are connected non-rotatably and releasably to one another by a connecting mechanism which has a journal projecting in the axial direction and a receptacle which receives the journal.

A power tool includes a housing; a handle having two ends, each being moveably mounted to the housing associated mountings; and a biasing mechanism connected between the housing and the handle; wherein at least one of the mountings comprises: a first part mounted on the housing and a second part mounted on the one end of the handle, one part comprising a passageway, the other comprising a rod, having a longitudinal axis, which is located in and capable of being axially slid within the passageway, enabling the end of the handle to move towards or away from the housing; at least part of the wall of the passageway in a lengthwise direction of the passageway comprises a curved convex support surface capable of engaging the side of the rod to enable the rod to pivot within the passageway about an axis which is perpendicular to the axis of the rod.

A cutter holder has a body, a fastening bolt, and a vibration absorbing structure. The body has a specific weight. The fastening bolt is mounted inside the body. The vibration absorbing structure is mounted inside the body and has a sleeve, an elastic unit, a spacer, and a set nut. The sleeve is mounted around the fastening bolt and has a specific weight. The specific weight of the sleeve is larger than the specific weight of the body. The elastic unit is mounted around the fastening bolt and has two opposite ends. One of the ends of the elastic unit abuts against the sleeve. The spacer is mounted around the fastening bolt and abuts against the other end of the elastic unit. The set nut is screwed with the fastening bolt and abuts against the spacer.

A construction component for detecting the application of energy and responding to the energy input wherein a plurality of particles are distributed throughout the component with each particle being configured to sense component state information. The component includes at least one processor configured to receive sensing information from the plurality of particle sensors. The processor configured to receive component state information and to process the information to determine a response to selectively alter attributes of the construction component to affect the behavior of the component. The plurality of particles capable of converting a portion of the energy applied to the construction component into an alternative form of energy, wherein the converted energy is harvested for utilization elsewhere.

The present invention relates to an apparatus and method for attenuation of vibration in a machine tool, and more particularly, to an apparatus and method for attenuation of vibration in a machine tool in which a vibration of a machine tool is measured, and generates an identical frequency with a piezoelectric actuator as well as changes a phase for making dissipative interference of a generated vibration wave form.

A machine tool for machining workpieces comprising a support structure, a punching device mounted on the support structure, and a laser machining device mounted on the support structure. The machine tool includes a suspension device provided between the punching device and the laser machining device to reduce the laser machining device from being stimulated to move unintentionally due to the operation of the punching device. The suspension device has a spring rate which can be adjusted by a laser positioning device. The laser positioning device can move the laser machining device relative to the workpiece into a functional position and also into a position remote from the functional position. The spring rate of the suspension device is adjusted such that the functional position of the laser machining device is assigned a higher spring rate than that assigned to the position of the laser machining device remote from the functional position.

A damper includes a damper body that is configured to be attached to a workpiece during a machining process. A first side of the damper body is configured to abut a first side of the workpiece. The damper body includes a frame forming an outer periphery of the damper body, a plurality of damper nodes with a cavity in each damper node positioned in the frame, and a plurality of ribs extending between the frame and the damper nodes. A damping material is positioned in the cavity of each damper node.

A tool chuck for clamping a tool in a machine tool, having a base body and a sleeve part protruding therefrom, which sleeve part forms a tool holder for fixing a tool shaft in a frictional, nonpositive fashion; a cavity in which a vibration damping component is accommodated is provided in the tool chuck.