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:
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:
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).
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 multicoordinate sensing measuring device is proposed in which a sensing lever (5) that is resiliently spring-pretensioned in a resting position in a housing (3) can be displaced along a measuring axis (7) and can be pivoted transversely to the measuring axis (7). A connecting piece (25) is guided in a movable manner in the direction of the measuring axis (7) on a guide surface (23) of the housing (3). The sensing lever carries along the connecting piece (25) via a linkage (31, 33) when the sensing arm (5) is displaced in the direction of the measuring axis (7) as well as when the sensing arm is deflected in the direction of the measuring axis (7). A measuring device (21) detects the position of the connecting piece (25) relative to the housing (3). The connecting piece (25) and the guide surfaces (23) form bearing surfaces for balls of the ball bearing arrangement (27) where the bearing surface of at least one of these components—connecting piece (25) and housing (3)—can be elastically deflected transversely to the bearing surface and clamps the balls (65) free of play between the bearing surfaces. The connecting piece (25) or/and the housing (3) are made of aluminium or an aluminium alloy and are coated with a comparatively thin hard-anodized layer into which the balls (65) can wear a track groove. Such a sensing measuring device can be manufactured with relatively large manufacturing tolerances and is nevertheless able to guide the connecting piece (25) in a movable manner essentially free of play in the housing (3).
Abstract:
To set the length of a rotary tool (1a), to be thermally shrunk in place in a tool holder (7a), by means of an inductive heating device (15a), a setting device is provided with a positioning holder (61) for the rotary tool (1a), this positioning holder (61) being freely displaceable, but lockable, along a guide (35a) and its tool push-in movement into the thermally expanded tool holder (7a) being limited by a stop (71). The rotary tool (1a) bears with its tip (31a) against a stop (43a) of the positioning holder (61). By means of a length-measuring device (39a), the stop (71) limiting the push-in movement can be limited to a position in which the tip (31a) of the rotary tool (1a) is at a predetermined distance from a reference surface (33a) of a holder receptacle (17a), holding the tool holder (7a) during the shrink-fitting operation, or from a corresponding reference surface of the tool holder (7a).
Abstract:
A centering device, in particular for a tracer-type measuring instrument (1), is proposed. The centering device comprises an instrument carrier (3) defining an instrument axis (7), a carrying shank (41) defining a shank axis (43) and a centering holder (45) holding the instrument carrier (3), with the instrument axis (7) parallel to the shank axis (43), radially movably to the latter, but so as to be capable of being fixed to the carrying shank (41). The centering holder (45) is designed as a parallelogram guide with a parallelogram-link region (59), or a plurality of these regions, distributed about the shank axis (43) and the instrument axis (47) and extending along these axes (7, 43). Such a parallelogram guide may be integrally formed in one piece on the carrying shank (41) and/or on the instrument carrier (3), thus reducing the outlay in terms of production. Setscrews (69) distributed on the circumference of the parallelogram guide make it possible to adjust the shank axis (43) in relation to the instrument axis (7).
Abstract:
The invention relates to a shrinking device (1) for shrinking a rotary tool (5) into a central receiving opening of a toolholder (3) which holds said rotary tool (5) in a press fit. The device comprises an induction heating device (15, 18) for thermally expanding the toolholder (3) in the area of the receiving opening. A cooling device (51, 53) with at least one cooling collar (53) which can be placed on the toolholder (3), 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:
The invention relates to a shrinking device (1) for shrinking a rotary tool (5) into a central receiving opening of a toolholder (3) which holds said rotary tool (5) in a press fit. The device comprises an induction heating device (15, 18) for thermally expanding the toolholder (3) in the area of the receiving opening. A cooling device (51, 53) with at least one cooling collar (53) which can be placed on the toolholder (3), 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.