Abstract: A positioning device for chip removing tools, in particular turning tools of chip removing machines like turning and milling machines or similar, in tool holders, in particular collet holders, clamping holders and shrink holders, having a receiver for the tool holder, which comprises first positioning means, in particular an engagement- or index groove, wherein in the tool holder receiver second positioning means are provided, which predetermine the first angular position ? of the tool holder with reference to the tool holder receiver through engagement with the first positioning means, wherein the tool holder is aligned in the tool holder receiver with its longitudinal axis along a first axis, wherein a tool receiver is provided, which fixates the tool in a second annular position ? with respect to the tool receiver, wherein the tool is aligned with its longitudinal tool axis along a second axis and the tool receiver is moveable with respect to the tool holder receiver, so that the tool is insertable into th

Abstract: The invention relates to a tool holder with a tool holding fixture, in particular a clamping chuck such as a contracting chuck, a draw-in collect chuck, a hydraulic expanding chuck and a high-precision chuck, and a shank of a tool, in particular a rotary tool, accommodated in it, wherein the tool holder contains a means for preventing the tool from being pulled out, locking it against axial displacement. This pull-out preventing unit comprises at least one locking element and at least one locking groove, which corresponds to the said locking element, receives it and interacts with it in a positively locking manner. In this case, both the locking element and the locking groove are formed at least partly in the manner of a ball head. Preferably, the tool has the locking grooves.

Abstract: The invention relates to a tool holder (1) for clamping tools by shrink fit. Said tool holder, due to its specific shaping in the area of the shrink-fit head (6) and the shrink-fit base (5) of the tool holder, is less prone to oscillate than known tool holders, therefore allowing inter alia higher speeds so that the cutting capacity, determined by the speed of the tool, the tool feed and the cutting depth of the tool, can be increased and the machine running times required to produce a workpiece can be reduced. The tool holder (1) of the present invention allows to produce and machine workpieces in a substantially more efficient and economical manner.

Abstract: A tool holder (10) for a tool which can rotate about an axis of rotation (D) comprises a clamping shank (18) which, in an end shank region, has a clamping formation (14) with an accommodating opening (16) which is central in relation to the axis of rotation (D) and is intended for accommodating a retaining shank of the tool, there being provided, on the lateral circumference of the accommodating opening (16), at least one clamping surface for securing the retaining shank of the tool with press-fit action. According to the invention, on an axial section which forms an axial bracing section (VA), the tool holder (10) has a bracing arrangement (20) which, at least during operation of the tool holder (10), subjects the tool holder (10) to a bracing force (Vk) with a bracing force component (Vk) acting in the axial direction.

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 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 method and a device (20) for cooling tool holders comprising shrink fit chucks, said tool holders beings received in a tool holder seat. The invention provides an especially efficient and above all completely automatable cooling system which allows a successive cooling of a plurality of tool holders (36). The cooling device (20) is very economical and can be shaped in such a manner as to be perfectly adapted to the space available and to already present shrink-fit devices (42).

Abstract: The induction coil unit (1) for heating a sleeve section (3) of a tool holder (5) holding the shaft (13) of a rotation tool in a receiver opening (11) in press fit comprises two coil units (21, 23), whose distance can be changed selectively through at least one slanted surface cam assembly (43). A magnetic flux concentrator assembly (33) with several concentrator elements (55) distributed in circumferential direction is associated with the coil unit (21) adjacent to the free end (15) of the sleeve section (3). The width of a pass through opening (57) defined by the concentrator elements (55) for the tool shaft (13) is also changeable through a control cam (69), to which the concentrator elements (55) are coupled through a slanted surface cam assembly (73). The two slanted surface cam assemblies (43, 73) are coupled amongst each other in a useful manner in order to simplify the operation of the unit (1).

Abstract: A circuit 1 for controlling the supply of electrical power to an induction coil 2, in particular to an induction coil 2 for heating a shrink attachment for tools, comprises a rectifier 3, having an input 3a, 3b, 3c for feeding an input power, and a rectifier output. The circuit 1 furthermore comprises an inverter 5 for putting out an AC-voltage, having an input and an inverter output 5a, 5b for connecting the induction coil 2, an intermediary circuit 4 for connecting the rectifier 3 with the inverter 5, and a regulation unit for regulating the power supplied to the induction coil 2. A measurement apparatus 6 for measuring a voltage A2 as an input variable for the regulation unit is connected to the output side of the inverter 5. A respective method for regulating the power supplied to the induction coil 2 comprises a regulation step, in which the current A2 supplied to the induction coil 2 is used as an input variable for the regulation of the power supplied to the induction coil 2.

Abstract: The aim of the invention is to improve the guiding of a lubricant through a tool holder in a small quantity lubrication system. According to the invention, a tool holder (1) comprises, in the maintaining body thereof (3), an axially displaceable stop sleeve (45) which is mounted in a through opening (31) which is connected to the receiving opening (13) for a tool shaft (15) and a stop surface (47) which is adjacent to the front end (23) of the tool shaft (15). Said stop sleeve (45) is screwed into an inner thread (43) of the through opening (31) and is coupled in a rotationally fixed manner, but in an axially displaceable manner, to a control tube (49) which engages in said stop sleeve (45) in an axial manner. Said control tube (49) is mounted in an axially fixed manner to the side thereof, but in a rotatable manner to the fluid coupling (27). A lubricant can be guided over the blades of the tool (9) by means of the fluid coupling (27), the control tube (49), the stop sleeve (45) and channels (17).

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 unbalance measuring device comprises a spindle unit (7) with a spindle holder (29) and with a spindle (11) mounted on the spindle holder (29) rotatably about an axis of rotation (9) and carrying at one of its two ends a coupling for fastening the article to be measured. The spindle unit (7) is combined together with an electric motor (5) for driving the spindle (11) into a first preassembled subassembly. The spindle holder is itself fastened releasably to a machine base (1) by means of a holder suspension (49), the holder suspension (49) itself being combined into a preassembled subassembly together with a sensor arrangement (61) measuring the unbalance forces during operation. For the releasable fastening of the two subassemblies to one another, connecting elements assigned in an indexed manner, for example a dovetail connection (77), are provided. Since the two subassemblies are preassembled, they can be exchanged on site in the event of a repair, without complicated adjustment measures being required.

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: 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 tool holder for a tool which can be rotated about an axis of rotation, in particular a drilling, milling or reaming tool, comprises a clamping shank which, in an end shank region (7), has an accommodating opening (9) which is central in relation to the axis of rotation and is intended for accommodating a retaining shank of the tool. Clamping surfaces for securing the retaining shank of the tool with a press fit are arranged on the circumferential casing of the accommodating opening. According to the invention, the end shank region (7) of the clamping shank has a plurality of at least more or less axially extending tension spokes (13) distributed in the circumferential direction, it being possible for said tension spokes to be subjected to an essentially radially outwardly directed tensile force in order for the clamping surfaces to be spread apart radially from one another.

Abstract: The invention relates to a shrinking device for shrinking a rotary tool into a central receiving opening of a toolholder which holds said rotary tool in a press fit. The device an induction heating device for thermally expanding the toolholder in the area of the receiving opening. A cooling device with at least one cooling collar which can be placed on the toolholder, in physical contact with the same, and through which a liquid coolant can flow, is provided for cooling the receiving opening area of the toolholder. This liquid cooling considerably reduces the overall time span needed for the shrinking process.

Abstract: A tool holder comprising a coupling shaft, a shrink chuck and a central member. The shrink chuck has a head and a base, the head having a tensioning portion with a carrier comprising an axial internal bore. The central member is interposed between the coupling shaft and the base. A surface contour connecting the front and rear diameters of the shrink chuck has at least two portions substantially even relative to a diameter course of the contour at the at least two portions. A first portion is disposed on the head and a second portion is disposed on the base, and a transition is interposed between the head and the base. A chuck diameter of the shrink chuck increases in a substantially discontinuous manner at the transition from the first portion to the second portion so that the head is slimmer than the base.

Abstract: A tool holder is disclosed for a boring, milling or reaming tool that can rotate about an axis of rotation. At the end of its clamping shank that is located on the side of the tool, the tool holder has a bush part with a mounting opening, which is centered with regard to the axis of rotation and which is provided for accommodating a fixing shank of the tool. The mounting opening for a bush part can be radially expanded to a width, which enables the fixing shank to be inserted or removed, particularly by means of eddy currents that are magnetically induced inside the bush part by an induction coil. In addition, the mounting opening can, by cooling, be radially contracted to a width that holds the fixing shank with an interference fit.