Abstract: The present invention relates to a tool holder (1) that either has a modular design, and the modules of which are centered via interfaces, or/and in which a centered interface (9) is provided between the tool (5) and the tool receiver (4) such that high concentricity, and thus a high processing accuracy are achieved. The present invention further relates to a system comprising a tool holder (1) and a tool (5).

Abstract: A device for clamping and unclamping of tools comprising a tool shaft, by which device a sleeve section (2) of a tool holder (1) comprising a centric receiver opening (4) for a shaft (5) of a rotation tool is inductively heated, which sleeve section retains the shaft (5) of the tool seated in the receiver opening (4) in a press fit, and releases it upon heat up, which device comprises an induction coil assembly with at least one induction coil (6), which can be fed by an electric current for heating the sleeve section (2), and which comprises a concentrator body (11), which is magnetically conductive and electrically nonconductive or substantially electrically nonconductive, which concentrates the magnetic flux of the induction coil (6) onto the portion of the tool side end of the sleeve section (2), wherein the concentrator body (11) supports an induction attachment (14) made of electrically conductive material.

Abstract: The invention relates to a balancing device, having a measuring system for determining the rotational unbalance of a test object, comprising a spindle unit with a spindle, which is intended to hold the test object and rotate it at a test rotational speed, and a spindle mounting, by which the spindle unit is movably anchored on the machine base, such that the spindle unit can oscillate in a predetermined measuring direction as a result of the unbalance forces occurring during the measurement operation, and at least one sensor, which upon rotation of the spindle detects at least one unbalance characteristic variable occurring in the measuring direction, and a material removal system for balancing the test object by material removal in a predetermined site. The measuring system and the material removal system are designed such that material can be removed when the test object is held in the spindle.

Abstract: The present invention relates to a low-vibration tool holder (1) with a tool holder base body (2, 3, 4, 6) and a tensioning arrangement (5) which provides axial tensioning of the tool holder base body (2, 3, 4, 6) and which is simultaneously tensioned in a radially flexible way with respect to the tool holder base body (2, 3, 4, 6). This tool holder (1) is less susceptible to vibration than previously known tool holders, which ensures better true running even during operation and in particular when heat-induced expansion of materials occurs, since the clamping arrangement (5) which is integrated in the tool holder (1) is continuously centered with respect to the tool holder base body (2, 3, 4, 6). Furthermore, such a tool holder (1), in particular within a modular design, can be adapted very flexibly to different types of tools and workpiece machining processes.

Abstract: The invention relates to a device for cooling an object that was previously subjected to a heat application, generally a multi-piece composite, particularly in the form of a shrink-fit chuck into which the shank of a tool was chucked or from which it was removed (cooling device), wherein the device comprises a pump, by way of which it generates a carrier gas flow, particularly an air flow, which is charged with a liquid cooling medium, particularly water, so that a coolant flow, the majority of the volume of which consists of the carrier gas, is created, which then spreads over at least the section of the object to be cooled.

Abstract: A device for measuring the rotational imbalance of a specimen, having a spindle unit with a spindle, which is embodied to hold the specimen and to allow it to rotate at a testing speed, a holder suspension by means of which the spindle unit is anchored to the machine base in pendulum fashion such that the imbalance forces occurring during the measurement operation are able to move the spindle unit back and forth in a predetermined measuring direction M, and a sensor arrangement that detects at least one imbalance parameter occurring in the measuring direction M during rotation of the spindle, wherein the spindle unit is supported by means of at least one auxiliary bearing that is only able to transmit forces in the direction of a normal N to the measuring direction M.

Abstract: The invention relates to a tool holder comprising a tool receptacle for frictionally clamping a tool shaft. A sleeve is arranged between the tool shaft and the clamping surface of the tool holder, said tool holder applying pressure to the tool shaft via the sleeve, producing the friction fit. At least one of the bearing surfaces of the sleeve is interrupted by open surfaces that are designed and arranged such that they form the damping cavities.

Abstract: The invention relates to a tool holder comprising a tool receptacle in the form of a sleeve part, which comprises a tool receptacle opening comprising a mating surface which is concentric with the axis of rotation of the tool holder and on which the shaft of a tool inserted in accordance with the intended purpose thereof into the tool receptacle opening of the sleeve part can be fixed in a press fit, wherein the sleeve part comprises a number of circumferential recesses from the side of the mating surface, wherein the recesses divide the mating surface into several mating surface segments which are comparable to each other and which are substantially inherently rigid in the axial direction, wherein the radial depth of the recesses is selected such that the press fit releases substantially uniformly on all mating surface segments under the influence of heat applied over the outer circumference of the sleeve part.

Abstract: A clamping device 1a for clamping a work piece of a rotating spindle of a machine tool, in particular a balancer, wherein the clamping device comprises a base body 2, which is configured to be fixated at the spindle and which comprises at least one change body 1 which can be coupled to and decoupled from the base body 2, wherein the change body 1 and the base body 2 are supported coaxial to one another and clamped relative to one another in radial direction by roller elements 11, wherein each of the roller elements 11 is disposed in a gap between the base body 2 and the change body 1, which is configured as a wedge shaped gap and adapted to the respective roller element 11, so that the respective roller element can be moved along the wedge shaped gap, deeper into the wedge shaped gap, when the base body 2 and the change body 1 are connected to one another, so that the desired radial clamping is provided.

Abstract: The invention relates to a tool holding device comprising a tool holding body for securing, in a fixed manner, a rotary tool comprising a shaft, provided with a clamping section and a receiving opening for the shaft of the tool, a coolant feeding device for pressurized fluid, at least one coolant guiding device for guiding the coolant into a clamped tool shaft. The coolant guiding device is designed as at least one flat groove on an inner side of the receiving opening, joining to the front side on a free end of the tool holding body and directly adjacent to the tool shaft in the surroundings of the tool holding device or a coolant storing chamber and/or collecting chamber is provided in the region of the free end of the tool holding body, to which the at least one coolant guiding device joins. The coolant storing chamber and/or collecting chamber is connected by means of an annular gap to the surroundings of the tool holder device.

Abstract: An attenuating adaptor is proposed in the form of a sleeve (23) which is composed of non-ferromagnetic metal for insertion radially during operation between a holding section (11) (which is provided with a central holding opening (15) for holding a tool shank with a press fit) of a tool holder (1) and an induction coil arrangement (19) (which concentrically surrounds the holding section (11) in order to widen it thermally) of a shrinkage appliance (5) which feeds alternating current to the induction coil arrangement (19). The sleeve (23) can be provided with slots which pass through its wall and whose number, axial length and circumferential width influence the attenuating characteristics of the sleeve (23). Sleeves (23) of different sizes are provided for a set of different tool holders (1), and their attenuating characteristics are chosen such that all of the tool holders (1) in this set can be shrunk using one and the same setting of the shrinkage appliance (5).

Abstract: A balance ring for a component (1) rotating about a rotation axis (3), for example a tool holder for a rotating tool or else a machine spindle or the like, is proposed. The balance ring has an annular body (11) which is rotationally symmetrical with respect to an axis of rotational symmetry, a guide arrangement (13) guiding the annular body (11) in a radially movable but axially fixed manner on the component (1) with an axis of rotational symmetry essentially parallel to the rotation axis (3) of the component (1), and a plurality of adjusting elements (21) arranged in the circumferential direction of the annular body (11), preferably at equal angular distances from one another, radially supported between the annular body (11) and the component (1) and having a variable radial supporting length. The guide arrangement may be designed as an axially extending spring link arrangement or else as spring webs extending in the circumferential direction.

Abstract: The invention proposes a tool holder (1), in particular of the shrink-fit chuck type, the receiving section (5) of which comprises clamping means (9) which are provided centrally with respect to an axis of rotation (7) of the tool holder (1) for holding a shank (15) of a rotary tool, and which define a receiving opening (13) for the shank (15). The clamping means (9) can be displaced in the radial direction between a radially widened release position for insertion or removal of the shank (15) and a clamping position, in which the clamping means (9) exert radial press-fit forces, which hold the shank (15) in a frictional lock on its cylindrical outer circumferential surface (19), on the shank (15). The clamping means (9) are assigned a clamping surface (17) with a cylindrical contour which, in the clamping position, bears against the outer circumferential surface (19) of the shank (15) with surface-to-surface contact.

Abstract: The invention relates to a device for inductive heating of an electrically-conducting component section symmetrical relative to an axis, in particular, a sleeve section of a tool clamping chuck for clamping a tool by means of a press fit, wherein the device has several pole pieces made from a magnetically-conducting material arranged in the circumferential direction around the symmetry axis of the component section introduced as required into the device and an induction device for supplying the pole pieces with magnetic flux such that the magnetic flux in pole pieces which are adjacent in the circumferential direction is opposed. The pole pieces are all mounted on the device such as to be movable about an axis (adjustment rotation axis) running essentially parallel to the axis of symmetry of the component section, such that each of the pole pieces can be adjusted in the direction of the surface region of the individual workpiece by means of a rotation about the provided adjustment rotation axis.

Abstract: To compensate for tolerances and diameter differences during the chucking of a tool shank (15) in a tool holder (1) of the shrink-fit chuck type, a diameter-compensating bush (17) is provided. The diameter-compensating bush (17) has an outer sleeve (19) having a tapered inner circumferential surface (25) and an inner sleeve (21) arranged coaxially therein and having a tapered outer circumferential surface (27). Once the diameter-compensating bush (17) has been put onto the tool shank (15) and the inner sleeve (21) has been drawn into the outer sleeve (19), for example by means of a ring nut (35), for the diameter compensation, the outer sleeve (19) is thermally shrunk in place in the locating section (9) of the tool holder (1). In this way, rotary tools whose tool shank (15) does not have a diameter corresponding to the diameter or the tolerance requirements of the tool holder (1) can be chucked in a tool holder (1), for example, of the shrink-fit chuck type.

Abstract: The present invention relates to a device for tensioning or de-tensioning tools, having a tool shaft in a tool chuck which has a sheath section open on the free end thereof and which is made of electrically conductive material, for receiving the tool shaft in a friction connection, having an induction coil which surrounds the sheath section of the tool chuck, to which preferably high-frequency alternating current can be applied, and which is designed as a ring or cylinder coil, wherein the device has at least one channel running between the inner peripheral surface of the induction coil and the sheath section of the tool chuck, through which flows a cooling agent which cools the sheath section of the tool chuck.

Abstract: The present invention relates to a tool holder (1) that either has a modular design, and the modules of which are centered via interfaces, or/and in which a centered interface (9) is provided between the tool (5) and the tool receiver (4) such that high concentricity, and thus a high processing accuracy are achieved. The present invention further relates to a system comprising a tool holder (1) and a tool (5).

Abstract: The invention relates to a device (1) for tightening and releasing clamping tools (16), such as draw-in collet chucks, mandrels and the like which allows a torque to be concentrically transferred onto a clamping device, such as a locknut (17), clamping screw or the like without radial stress and without the threaded sections of the clamping device (17) and the collet chuck base (31) or the like being subjected to an unbalanced load. In a preferred embodiment, the device (1) is universally applicable, has an especially simple design and can be rapidly adapted to the respective clamping tools (16).