DE102019101707B4 - Coupling device for connecting two components coaxially - Google Patents

Abstract

Coupling device (1) for connecting two components coaxially, in particular for connecting a tool or a workpiece to a rotationally drivable spindle of a machine tool, with a base body (2) which has receptacles (3, 4) on its opposite end regions for fixing the two components to be connected which each define a receiving axis (X1, X2), the receiving axes (X1, X2) being coaxial or nearly coaxial with one another and the position of the receiving axes (X1, X2) being adjustable relative to one another, the base body (2) having two base body sections ( 2a, 2b), on each of which a receptacle (3, 4) is provided for attaching a component, the two base body sections (2a, 2b) being connected to one another in a resilient manner in such a way that they move relative to one another in a radial direction with respect to one of the receptacle axes ( X1, X2) are adjustable and furthermore an adjusting device (8) is provided, which is suitable and trained t is to adjust the base body sections (2a, 2b) in the radial direction relative to each other and thus set a radial offset between the receiving axes (X1, X2), characterized in that an adjustment device (27) is also provided, which is suitable and designed to tilt the two recordings (3, 4) relative to one another in order to adjust the angular position of the recording axes (X1, X2) relative to one another.

Description

The present invention relates to a coupling device for the coaxial connection of two components, in particular for connecting a tool or a workpiece to a rotationally drivable spindle of a machine tool, with a base body which has receptacles on its opposite end regions for fixing the two components to be connected, each of which has a define the receiving axis, the receiving axes being coaxial or almost coaxial with one another and the position of the receiving axis being adjustable in relation to one another, the base body having two base body sections on each of which a receptacle for attaching a component is provided, the two base body sections being resiliently connected to one another in such a way that that they can be adjusted relative to each other in a radial direction with respect to one of the receiving axes and that an adjusting device is also provided which is suitable and designed to position the base body sections in the wheel ialrichtung to adjust relative to each other and set a radial offset between the recording axes.

The invention also relates to an arrangement for aligning a tool or a workpiece on a rotatingly drivable spindle of a machine tool, and a method for aligning a tool or workpiece on a rotatingly drivable spindle of a machine tool.

Rotating tools or workpieces are common practice when using machining processes. For example, in CNC lathes, the workpiece to be machined is usually placed and clamped in a chuck connected to the rotationally drivable spindle of the machine. Alternatively or in addition, it is also possible to use rotating tools, e.g. in grinding machines, milling machines, etc. The tools are placed in a corresponding clamping device and set in rotation via the spindle connected to it in order to machine a workpiece surface.

The accuracy of the concentricity sometimes plays a decisive role in the quality of the machining. Even small deviations can lead to a serious loss of quality with regard to the dimensional accuracy of the workpiece or the surface quality of a machined workpiece surface in some machining operations, in particular grinding machining.

The runout error is usually composed of an angular error, which means that the central axis of the tool or workpiece is inclined at an angle to its axis of rotation, and a radial offset, which means that the central axis of the tool or workpiece is not runs concentrically to its axis of rotation. Angular error is also commonly referred to as wobble error, while radial offset is commonly referred to as runout error. The quality of the concentricity properties of a tool or a workpiece in a machine tool is thus defined by the wobbling error and the concentricity error present.

The causes of these errors can be, among other things, an eccentric attachment of the clamping device to the rotationally drivable spindle of the machine tool, imprecise clamping of the tool or workpiece and/or curvatures in the geometry of the tool or workpiece.

The EXCOM system from Alfred H. Schütte GmbH & Co. KG, for example, is already known as a remedy for this. This provides for arranging a coupling device between the machine spindle and the clamping device, by means of which the concentricity error can be corrected. This system is only designed to correct runout. A correction of the wobble error is not provided.

There are also systems that are suitable for correcting both concentricity and wobble errors. In this case, a coupling device is arranged between the machine spindle and the clamping device, which has a plurality of adjusting screws distributed over the circumference. Although such systems have basically proven themselves, it is still considered disadvantageous that a defined correction of the wobbling error is difficult due to the large number of adjustment screws and, as a rule, several adjustment screws have to be operated, depending on the orientation of the inclination of the axis of rotation to the central axis of the tool or workpiece. As a result, it is usually necessary to carry out several adjustment processes, between which the concentricity and wobble errors must be measured, until a tool or workpiece is properly aligned. Furthermore, due to the large number of adjustment screws, it is difficult to automate the process of aligning the tool or workpiece.

From the DE 102 32 552 A1 a coupling device for coaxially connecting two components is known. This has a base body which has receptacles on its opposite end regions for fixing the two components to be connected. The two sections of the base body, in each of which the receptacle for a shaft is arranged, are resilient in this way connected to each other that they can be moved relative to one another in a radial direction and can be tilted relative to one another. A targeted adjustability for correcting the concentricity error and the wobbling error is not provided, however.

the DE 10 2014 119 482 A1 discloses a tool clamping device with a tool holder which can be used in a receptacle of a tool carrier, in particular a lathe. This has a rectangular mounting plate from which protrude four mounting pins on the back. These are drawn into a corresponding tool carrier by a corresponding mechanism. Furthermore, four adjustable sliding blocks protrude from the back of the mounting plate, which are provided for engaging in corresponding guide grooves of a tool carrier. In the section protruding from the fastening plate, each sliding block has a rectangular basic shape, which is adjoined by a wedge-shaped section which bears against a corresponding mating surface. By turning a hexagonal screw passing through the sliding blocks, the sliding block is displaced via the wedge mechanism, so that an adjustment relative to the tool carrier is possible. The radial offset of the shaft located in the tool holder can be adjusted relative to the tool carrier. However, no tilting of the shaft relative to the tool holder can take place. It is therefore not possible with the previously known device to correct the wobble error.

The object of the present invention is therefore to provide a device for the coaxial connection of two components, in particular for the connection of a tool or a workpiece to a rotationally drivable spindle of a machine tool, which avoids the aforementioned disadvantages and enables simple and rapid alignment of the two components to one another.

This object is achieved with a coupling device of the type mentioned at the outset in that an adjustment device is also provided which is suitable and designed to tilt the two receptacles relative to one another in order to adjust the angular position of the receptacle axes relative to one another.

The invention is thus based on the fundamental idea of creating a clutch device by means of which the wobbling error and the concentricity error can be corrected independently of one another. For this purpose, the main body of the coupling device has two main body sections that can be adjusted radially relative to one another by means of an adjusting device in order to be able to adjust the radial offset of the two receiving axes relative to one another and thus in particular to compensate for an existing concentricity error. This is made possible specifically by the spring-elastic connection of the two base body sections to one another. Furthermore, an adjustment device is provided, by means of which the two receptacles of the base body sections can be tilted relative to one another in order to adjust the angular position of the two receptacle axes and to compensate for an existing wobble error. When using the coupling device according to the invention for connecting a tool or a workpiece to a rotatably drivable spindle of a machine tool, wobbling errors and concentricity errors can thus be corrected independently of one another.

In a further embodiment of the invention, the adjusting device is radially retained on one base body section - the reference base body section - and is suitable for applying a force to the other - the adjustable base body section - with a radial effective direction in relation to one of the receiving axes, in order to move the adjustable base body section relative to the reference base body section . The adjusting device is thus designed in such a way that it is able to generate a radial force between the two main body sections in order to adjust them in the radial direction relative to one another.

The two base body sections preferably engage in one another to form a radial gap and are connected to one another by spring elements which bridge the radial gap and extend--in particular radially--between the base body sections. For example, the spring elements can run in an S-shape between the radially inner and the radially outer base body section and thus ensure a spring-elastic connection of the two base body sections to one another. In concrete terms, the reference base body section can form the radially inner base body section and the adjustable base body section can form the radially outer base body section.

In a further embodiment of the invention, the adjusting device is arranged so that it can rotate relative to the reference base body section about its receiving axis in order to be able to set the effective direction of the radial force. If the two base body sections are to be moved radially relative to one another, the direction of action of the radial force and thus the direction of movement of the two base body sections relative to one another can be adjusted in a simple manner by rotating the adjusting device.

The adjusting device is preferably held radially fixed by support means on the reference base body section.

The support means are thus used to support the actuating device against the reference base body section when the radial force is applied and to fix it thereon in the radial direction. The adjusting device has a rotational degree of freedom relative to the reference base body section about its receiving axis in order to be able to set the effective direction of the radial force, but is otherwise held firmly on the reference base body section in the radial direction. In order to realize the ability to rotate around the receiving axis of the reference base body section, the adjusting device preferably has an annular base body.

In a further refinement of this embodiment, the base body carries an axially projecting, in particular circumferential, guide web on each of its two end faces. The support means preferably comprise two guide rings, which are fastened to the reference base body section and counter-webs corresponding to the guide webs, which radially surround the guide webs and rest against them on the outside in order to radially position the base body of the actuating device. The adjusting device is thus supported radially on the two guide rings fastened to the reference base body section. Thus, if a radial force is applied to adjust the base body sections relative to one another, the counterforce acting against the radial force is absorbed by the reference base body section.

Specifically, carrier elements can be arranged on the reference base body section in two rows that are axially offset from one another in relation to its receiving axis, each distributed over the circumference, which radially penetrate the adjustable base body section and protrude beyond it, with a guide ring being attached or attachable to a row of carrier elements. The transmission of force from the guide rings to the reference base body section is thus realized via support elements which penetrate the adjustable base body section radially and to which the guide rings are attached or can be attached. The guide rings can be screwed or screwed to the carrier elements. This allows power to be transmitted between the guide rings and the reference base body section, with the guide rings being detachably fastened at the same time.

In a specific embodiment, the carrier elements can be formed in one piece with the reference base body section or attached to it, in particular screwed on. Each row of carrier elements can have at least 4 and/or at most 10 carrier elements distributed over the circumference. On the one hand, the distances between the support elements distributed over the circumference must not be too great, since the radial force can act in any direction depending on the task and the counterforce must therefore also be able to be transmitted in the corresponding opposite direction to the reference base body section. Too large a distance leads to significant bending moments in the carrier elements and is therefore to be regarded as disadvantageous. On the other hand, an excessive number of carrier elements would lead to a large number of screw connections that have to be loosened or made when installing or removing the guide rings, so that a number of 4 to 10 carrier elements distributed over the circumference has proven to be advantageous.

Furthermore, the coupling device can comprise at least one clamping element, in particular a plurality of clamping elements distributed over the circumference, which clamp around the two guide rings axially from the outside in order to counteract the guide rings breaking out in the axial direction. This configuration is based on the consideration that when a radial force is applied to the adjustable base body section, the guide rings tend to move axially outwards away from the base body of the adjusting device due to the counterforce absorbed by them and transmitted to the reference base body section. The guide rings are held axially on the base body of the adjusting device by the clamping elements. The clamping elements can be fastened, in particular screwed, to the base body arranged centrally between the guide rings. Thus, an unintentional loosening of the clamping elements caused by the centrifugal forces occurring during a rotary movement of the coupling device is prevented.

In order to apply the radial force, the base body can have a contact surface which bears against a peripheral surface of the adjustable base body section. A radial pressure chamber that can be acted upon by a hydraulic medium can be formed in the base body, with a thin wall being provided between the contact surface and the radial pressure chamber, which can be elastically deformed by increasing the pressure in the radial pressure chamber in order to compensate the radial force apply to the adjustable body section. According to this embodiment, the adjusting device works in a similar way to a hydraulic expansion chuck, ie deformation of a surface lying against the adjustable base body section causes a force to be exerted on the adjustable base body cut applied. For this purpose, only a thin wall is provided between the contact surface and the pressure chamber, which can be elastically deformed by increasing the pressure in the radial pressure chamber. Thus, as soon as pressure is applied to the hydraulic medium located in the radial pressure chamber, the thin wall deforms towards the peripheral surface of the adjustable base body section and thus causes a force with a radial effective direction to be applied to it. As a result, the adjustable body portion is radially displaced relative to the reference body portion. The radial adjustment path can be specified by adjusting the pressure of the hydraulic medium in the radial pressure chamber.

The radial pressure chamber can extend over a circumferential angle of at least 90°, in particular at least 120° and/or at most over 180°, in particular at most 160°, preferably over a circumferential angle of 140°. With such a peripheral angle of the radial pressure chamber, a pressure is applied to a corresponding partial peripheral area of the adjustable base body section, which pressure forms a resultant force with a clear radial effective direction.

To adjust the pressure of the hydraulic medium in the radial pressure chamber, the adjusting device has clamping means which are designed to optionally increase the pressure in the hydraulic medium, the clamping means being operatively connected to the radial pressure chamber via a hydraulic medium supply channel. In concrete terms, the clamping means can comprise a clamping screw which is accessible from a radially outer peripheral surface of the base body. Such a clamping screw represents a simple way of adjusting the pressure of the hydraulic medium in the radial pressure chamber. In order to implement the operative connection, the hydraulic medium supply channel can be formed between the radial pressure chamber and a storage area for hydraulic medium. The storage area can be designed in the form of a circular cylinder in which a piston that can be moved via the clamping screw is arranged in a displaceable manner. Screwing in the clamping screw then causes hydraulic medium to be fed into the radial pressure chamber and the pressure of the hydraulic medium increases, thus also increasing the force acting radially on the adjustable base body section and, as a result, the adjustment path of the adjustable base body section relative to the reference base body section.

In a further refinement of the embodiment, the clamping screw for turning can have an engagement option for an actuating means, in particular an Allen key or an Allen key. Such an intervention option for a common tool enables both manual and mechanical adjustment of the pressure, since, for example, a corresponding actuating means can be guided in a machine tool and can be mechanically engaged with the clamping screw. Alternatively, the clamping screw can also be provided with a knurled nut, which allows manual adjustment of the pressure in the radial pressure chamber without the need for tools. It is also conceivable to provide the clamping screw with a toothing, in which a corresponding counter-toothing of an actuating means can engage, in particular for the mechanical adjustment of the pressure in the radial pressure chamber.

The adjusting device can also have a ventilation valve that is operatively connected to the radial pressure chamber, in order to simplify filling the radial pressure chamber with the hydraulic medium and to avoid the formation of air bubbles, which would make it more difficult to increase the pressure of the hydraulic medium.

In order to set the angular position of the two mounting axes relative to one another, the adjustment device can be suitable for elastically deforming one of the two base body sections in such a way that its mounting axis is tilted relative to the mounting axis of the other base body section. In other words, the angular position of the receiving axes is adjusted relative to one another in that one of the two main body sections is elastically deformed by the adjustment device. The elastic deformation results in the receiving axis of the deformable base body section being tilted relative to the receiving axis of the other base body section.

In this case, the adjustment device is preferably suitable for applying a bending moment to the deformable base body section in order to deform it elastically. Specifically, to generate the bending moment, the adjustment device can be designed to apply an axial force acting eccentrically to the receiving axis on the deformable base body section. It is thus provided that a bending moment, which is oriented perpendicularly to the receiving axis, causes elastic deformation of the base body section with the effect that the angular position of its receiving axis changes relative to the receiving axis of the other base body section. A bending moment oriented perpendicularly to the mounting axis causes the two mounting axes to tilt relative to one another. The bending moment is preferably generated in that the adjusting element exerts an axial force on the deformable base body section applies, whereby the distance from the receiving axis forms a lever arm through which the effective position is eccentric to the receiving axis, through which the bending moment is generated.

In a further refinement of this embodiment, the adjustment device can be rotated relative to the deformable base body section about its receiving axis in order to be able to adjust the application position of the axial force. Due to the fact that the adjustment device can be rotated about the receiving axis of the deformable base body section, the direction in which the bending moment acts and the two receptacles are tilted relative to one another can thus be adjusted. This enables a functional separation between the adjustment of the orientation of the tilting of the two receptacles relative to one another, which is specified by the rotational position of the adjustment device about the receptacle axis of the deformable base body section, and the magnitude of the tilting angle, which is determined by the magnitude of the force acting eccentrically to the receptacle axis is defined.

In a preferred embodiment, the deformable base body section is ring-shaped and provided in its radial outer surface is a ring-shaped circumferential groove forming a flexure joint, in which groove the adjusting device is arranged. The resulting narrowing of the cross section of the base body section increases its elastic deformability and thus simplifies a defined tilting of the receiving axis of the deformable base body section.

To apply the axial force, the adjustment device can have an annular base body in which an axial pressure chamber that can be acted upon by a hydraulic medium is formed, with a thin wall between at least one end surface of the base body, which bears against a side wall of the groove, and the axial pressure chamber is provided, which is elastically axially deformable by increasing the pressure in the axial pressure chamber in order to apply the axial force to the base body section. In a similar way to the adjusting device already described above, the adjusting device can also be provided with a pressure chamber which is separated from a front surface of the base body by a thin wall, so that the thin wall can be deformed in order to press against the adjacent side wall of the groove apply axial force. A thin wall can preferably be provided on both end surfaces, so that the thin wall of the base body is deformed towards both side walls of the groove. For this purpose, the axial pressure chamber can have several pressure chamber sections, which in the vicinity of the thin wall have a greater extension in the radial direction than in an axially central section of the base body, which on the one hand enables greater deformation and thus a more favorable introduction of force to the side walls of the groove On the other hand, the reduced cross-section in the axially central area ensures high stability of the base body.

The axial pressure chamber preferably extends over a circumferential angle of at least 30° and/or at most 90°, preferably over an angle of 60°. Such a peripheral angle of the axial pressure chamber exerts a pressure on a partial peripheral area of the side wall of the groove, which pressure forms a resultant axial force with an active position in the circumferential direction in the center of the area of the axial pressure chamber.

In a further embodiment, a tensioning element can be provided in the adjustment device, which is designed to selectively cause a pressure increase in the hydraulic medium, the tensioning element being operatively connected to the axial pressure chamber via a hydraulic medium feed channel. In concrete terms, the tensioning element can comprise an adjustment screw which is accessible from a radially outer peripheral surface of the adjustment device. In the same way as with the adjusting device described above, such an adjusting screw makes it possible to adjust the pressure of the hydraulic medium in the axial pressure chamber in a simple manner. The hydraulic medium replenishment channel can extend between the axial pressure chamber and a storage space for hydraulic medium. The reservoir preferably has the shape of a circular cylinder, in which an actuating piston that can be moved by the adjusting screw is arranged in a displaceable manner. Turning in the adjusting screw thus causes hydraulic medium to be fed into the axial pressure chamber and the pressure of the hydraulic medium increases, which also increases the force acting axially on the deformable base body section and, as a result, also increases the adjustment angle of the receiving axes relative to one another.

In order to turn the adjusting screw, it can have an engagement possibility for an actuating means, in particular an Allen key or an Allen key. It is also conceivable to provide teeth on the adjusting screw, in which a corresponding counter-toothing of an actuating means can engage. This enables both manual and mechanical adjustment of the pressure of the hydraulic medium in the axial pressure chamber. For example, a corresponding actuating means can be attached to the tool turret of a machine tool be brought, whereby a machine turning of the adjusting screw is made possible. In the same way as with the adjusting device already described, the adjusting screw can also be provided with a knurled nut, which enables manual adjustment of the pressure in the axial pressure chamber without the need for tools.

Furthermore, the adjusting device can include a vent valve, which is operatively connected to the axial pressure chamber in order to enable it to be easily filled with hydraulic medium. The formation of air bubbles in the area of the axial pressure chamber can thus be avoided.

In a further refinement, the base body can be designed to be divided for insertion into the groove and can comprise a plurality of peripheral sections which can be inserted into the groove and which can be or are connected to one another, in particular by means of a screw connection. This configuration is based on the consideration of simplifying insertion and removal into the groove of the deformable base body section by means of a split feasibility and thus in particular enabling the adjustment device to be exchanged.

The base body is preferably designed in one piece, with the base body and/or the base body of the adjusting device and/or at least a peripheral section of the base body of the adjusting device being produced by means of an additive manufacturing process, in particular by means of selective laser melting. A one-piece design of the base body has the advantage that there is no need for complex assembly work and the possibility of errors is thus avoided. Due to the complex geometry, the base body, which can include the spring elements and/or the carrier elements, as well as the base body of the adjusting device and the peripheral sections of the base body of the adjusting device are preferably suitable for using an additive manufacturing process. Such a manufacturing process can usually produce almost any workpiece geometry. The base body and/or the base body of the adjustment device and/or the peripheral sections of the base body of the adjustment device are preferably made of a dimensionally stable but elastically deformable material, for example a metallic material, in particular a steel or aluminum material, or a plastic. Selective laser melting is a particularly suitable manufacturing process for metallic materials.

The receptacles formed in the base body sections can be formed as a recess which is open towards the end faces facing away from one another, in particular with a rice-shaped cross section for inserting a rotationally symmetrical, in particular corrugated, component. A circular cross-section of the receptacles enables components to be attached to the two main body sections in a clean, centered manner.

Furthermore, coupling means can be provided on the base body sections in order to be able to form a shaft-hub connection with a component to be attached to the respective receptacle. A shaft-hub connection is required in order to be able to transmit torque, especially with rotating components. As a possible shaft-hub connection, for example, screw connections can be considered, so that bores, in particular threaded bores, can be provided on the base body sections as coupling means. Alternatively, grooves can also be introduced into the receptacles of the base body sections, in order to be able to realize a connection by means of feather keys, for example. Furthermore, the receptacles can be provided as open recesses with a profiled cross section in order to accommodate a component with a corresponding counter cross section.

• eine Kupplungsvorrichtung wie zuvor beschrieben, wobei eine Aufnahme als antriebsseitige Aufnahme ausgebildete ist und mit der rotierend antriebbaren Spindel verbunden ist und die andere Aufnahme als abtriebseitige Aufnahme ausgebildet ist, an welcher das Werkzeug oder Werkstück angebracht ist.
• Messmittel zur Erfassung der Rundlaufeigenschaften des Werkzeugs oder des Werkstücks.

The object on which the invention is based is also achieved by an arrangement for aligning a tool or a workpiece on a rotatingly drivable spindle of a machine tool, comprising:

• a coupling device as described above, wherein one receptacle is designed as a drive-side receptacle and is connected to the rotationally drivable spindle and the other receptacle is designed as a driven-side receptacle to which the tool or workpiece is attached.
• Measuring equipment for recording the concentricity properties of the tool or the workpiece.

It is therefore intended to use the coupling device according to the invention for aligning a tool or a workpiece in a machine tool. The machine tool includes a rotationally drivable spindle to which the coupling device is attached via one of its two receptacles. The output-side mount opposite this drive-side mount is used for attaching the tool or workpiece. Specifically, a clamping device for clamping the tool or workpiece can be attached to the output-side receptacle, which can be designed as a hydraulic expansion chuck or as a multi-jaw chuck, in particular as a three-jaw chuck.

The measuring means can be suitable for detecting both the wobbling error and the concentricity error of the tool or workpiece set in rotation. It is necessary to determine the wobbling error and the concentricity error, since the coupling device makes it possible to set the angular position and the radial offset of the two receiving axes relative to one another independently of one another.

In concrete terms, the measuring means can comprise two dial gauges which are axially spaced apart from one another in relation to the drive-side receiving axis and which rest or can be brought into contact with the outer contour of the tool or workpiece in order to include the wobbling error and the concentricity error of the tool or workpiece set in rotation. A dial gauge is understood to mean a measuring device which has a contact sensor which, in the present case, is brought into contact with an outer surface of the tool or workpiece. The contact sensor must be brought into contact with a circular-cylindrical outer contour. In the case of a tool, the tool shank, which usually has a circular cross section, is ideal for this. If the tool or workpiece is set to rotate slowly, the contact sensor on the outer contour is moved if there is a wobble or concentricity error. The dial gauge is capable of detecting even small changes in the position of the contact sensor and displaying them accordingly. For this purpose, the dial gauge can have an analog or digital display and/or be connected to a control of the machine tool via a corresponding interface.

Two dial gauges that are axially spaced apart and each record the concentricity error make it possible to detect both the wobble error and the concentricity error of the clamped tool or workpiece, since a central axis of the tool or workpiece that is inclined to the axis of rotation at two measuring points that are axially spaced apart from one another different display values of the concentricity error, from the difference of which a direct conclusion about the wobbling error is possible.

Furthermore, the arrangement according to the invention can be designed for the automated alignment of a tool or workpiece on a rotatably drivable spindle of a machine tool, with actuating means being provided which can be brought into engagement with the clamping means and the clamping element. In other words, such an arrangement can be operated fully automatically if, for example, the machine tool is equipped in such a way that actuating means can be automatically brought into engagement with the clamping means and the adjusting device and the clamping element of the adjusting device. Specifically, the actuating means can be tools with a corresponding engagement contour, which is brought into engagement with a corresponding counter-contour, which is brought into engagement with a corresponding counter-contour on the clamping means or clamping element, for example a tool with an internal or external hexagonal profile. Furthermore, the actuating means can also be designed to rotate the adjusting device and the adjusting device about a receiving axis of the base body and thus to be able to adjust the direction of action of the radial force or the position of application of the axial force. In an efficient manner, identical actuating means can be provided for actuating the clamping means and the clamping element, which can be attached to the tool turret of a machine tool, for example.

• Bereitstellen einer Anordnung wie zuvor beschrieben mit einem drehfest in die abtriebsseitige Aufnahme eingebrachten Werkzeug oder Werkstück;
• Kippen der beiden Aufnahmen relativ zueinander durch Betätigen der Einstelleinrichtung, um den Taumelfehler des in Rotation versetzten Werkzeugs oder Werkstücks zu kompensieren;
• Verstellen der Aufnahmeachsen in Radialrichtung relativ zueinander durch Betätigen der Stelleinrichtung, um den Rundlauffehler des in Rotation versetzen Werkzeugs oder Werkstücks zu kompensieren.

The method according to the invention for aligning a tool or workpiece on a rotationally drivable spindle of a machine tool comprises the following steps:

• Providing an arrangement as described above with a tool or workpiece which is introduced into the output-side receptacle in a rotationally fixed manner;
• Tilting the two receptacles relative to one another by actuating the adjustment device in order to compensate for the wobbling error of the tool or workpiece set in rotation;
• Adjusting the receiving axes in the radial direction relative to one another by actuating the adjusting device in order to compensate for the concentricity error of the tool or workpiece set in rotation.

In other words, the arrangement according to the invention makes it possible, in particular through the coupling device provided therein, to compensate for the wobbling error and the concentricity error of a clamped tool or workpiece independently of one another. The alignment of a tool or workpiece therefore includes two independent steps, namely firstly the compensation of the wobble error, i.e. the angular deviation between the axis of rotation of the tool or workpiece and the central axis of the tool or workpiece. Thus, in a first step, the axis of rotation is aligned parallel to the central axis. In a second step, the receiving axes of the coupling device are adjusted relative to one another in the radial direction in order to align the axis of rotation and the central axis of the tool or workpiece, which already runs parallel thereto, coaxially with one another.

In a further embodiment of the method according to the invention, it is provided that the angle error is determined before the setting device is actuated. This can be done, for example, using two dial gauges that are axially spaced apart from one another, by bringing them into contact with a circular-cylindrical outer contour of the tool or workpiece and causing the tool or workpiece to rotate particularly slowly, allowing the dial gauges to be read. The wobble error can be determined by comparing the run-out errors on the two dial gauges.

The determination of the wobble error preferably includes both the determination of the size of the wobble error and the determination of the orientation of the wobble error. It is necessary to determine both variables, since in order to tilt the two receptacles in a preferred embodiment of the coupling device, the adjustment device must be rotated around the receptacle axis so that it counteracts the rotational position of the highest wobble error. The determination of the magnitude of the wobble error is in turn necessary in order to be able to specify the tilt angle of the two receptacles relative to one another by actuating the setting means.

Specifically, the actuation of the adjustment device includes setting the direction of the tilting corresponding to the direction of the angular error and setting the size of the tilting angle of the main body section corresponding to the size of the wobbling error. The wobble error is fully compensated if the two axially spaced dial gauges show the same values for the run-out error during a rotational movement of the tool or workpiece.

In the same way as with regard to the correction of the wobbling error, it is provided that the concentricity error is determined before the actuating device is actuated. Similarly, determining the runout includes determining the size and direction of the runout.

The actuation of the adjusting device in turn preferably includes the setting of the direction of the adjustment of the receiving axis relative to one another corresponding to the direction of the concentricity error and the setting of the size of the adjustment path corresponding to the size of the concentricity error.

Further advantageous refinements of the invention can be found in the subclaims and in the exemplary embodiment explained below with reference to the attached drawing.

• 1 eine Kupplungsvorrichtung gemäß der vorliegenden Erfindung in Seitenansicht;
• 2 die Kupplungsvorrichtung aus 1 in einer Längsschnittansicht;
• 3 die Kupplungsvorrichtung aus 1 und 2 in einer Querschnittansicht entlang der Schnittlinie D-D;
• 4 die Kupplungsvorrichtung aus 1 in einer Querschnittansicht entlang der Schnittlinien E-E;
• 5 die Stelleinrichtung der Kupplungsvorrichtung aus 1 in einer Vorderansicht;
• 6 die Stelleinrichtung aus 5 in einer Querschnittansicht;
• 7 die Stelleinrichtung aus 5 in einer Längsschnittansicht;
• 8 die Einstelleinrichtung der Kupplungsvorrichtung aus 1 in einer Vorderansicht;
• 9 die Einstelleinrichtung aus 8 in einer Querschnittansicht;
• 10 die Einstelleinrichtung aus 8 in einer Teillängsschnittansicht.

Show in the drawing:

• 1 a coupling device according to the present invention in side view;
• 2 the coupling device 1 in a longitudinal sectional view;
• 3 the coupling device 1 and 2 in a cross-sectional view along line DD;
• 4 the coupling device 1 in a cross-sectional view along section lines EE;
• 5 the actuating device of the coupling device 1 in a front view;
• 6 the setting device off 5 in a cross-sectional view;
• 7 the setting device off 5 in a longitudinal sectional view;
• 8th the adjustment device of the coupling device 1 in a front view;
• 9 the adjustment device 8th in a cross-sectional view;
• 10 the adjustment device 8th in a partial longitudinal section view.

the 1 until 4 show a coupling device 1 according to the present invention for the coaxial connection of two components, not shown, which is intended here for connecting a grinding tool to the rotationally drivable spindle of a machine tool. The coupling device 1 has a one-piece basic body 2 with an annular basic shape, which has a through-opening which extends in its longitudinal direction and defines a central axis X.

The base body 2 has two base body sections 2a, 2b, on each of which a receptacle 3, 4 is provided for attaching and fixing the two components to be connected with receptacle axes X1, X2 running coaxially to the central axis X. The receptacles 3, 4 are designed as recesses which are open towards the respective end faces of the base body 2 and have a circular cross section in order to be able to introduce a rotationally symmetrical component into them. Furthermore, coupling means are provided in order to be able to form a shaft-hub connection with a component to be attached to the respective receptacle 3, 4. Specifically, grooves 5 are formed in the recesses for this purpose.

The two base body sections 2a, 2b engage in one another to form a radial gap 6, with the two base body sections 2a, 2b being closed by spring elements 7 which form the radial gap 6 bridge and extend radially between the base body sections 2a, 2b are connected to each other.

Due to the resilient connection of the two base body sections 2a, 2b, these can be adjusted relative to one another in a radial direction with respect to one of the receiving axes X1, X2. For this purpose, an adjusting device 8 with an annular base body 9 is radially fixed on one base body section - the reference base body section 2a - and is suitable for applying a force with a radial effective direction in relation to one of the two receiving axes X1, X2 on the other - the adjustable base body section 2b, in order to to move the adjustable body portion 2b relative to the reference body portion 2a. In the present case, the reference base body section 2a forms the radially inner base body section and the adjustable base body section 2b forms the radially outer base body section.

The radially fixed positioning of the base body 9 on the reference base body section 2a is effected by means of support means. These include two circumferential guide webs 10, which are each formed on one of the two end faces of the base body 9 and protrude axially from it, and two guide rings, which are attached to the reference base body section 2a. The guide rings 11 each have a counter-web 12 which corresponds to the corresponding guide web 10 and bears radially on the outside against the associated guide web 10 in order to position the base body 9 of the actuating device 8 radially.

The guide rings 11 are each screwed to six carrier elements 13, which are arranged in two axially offset rows relative to its receiving axis X1 relative to one another over the circumference of the reference base body section 2a. The carrier elements 13 radially pass through the adjustable base body section 2b to the outside, for which purpose recesses 14 are provided in this section. As a result, the carrier elements 13 do not touch the adjustable base body section 2b, so that this can be adjusted relative to the reference base body section 2a. In the present case, the carrier elements 13 are screwed onto the reference base body section 2a. Alternatively, however, it is also possible to form the carrier elements 13 in one piece with this.

In order to prevent the guide rings 11 from breaking out in the axial direction, three clamping elements 15 are distributed over the circumference and grip the guide rings 11 radially on the outside. Unintentional loosening of these clamping elements 15 is avoided in that they are screwed to the base body 9 in the axial center.

To apply the radial force, the base body 9 of the actuating device 8 has a contact surface 16 radially on the inside, which rests against a peripheral surface 17 of the adjustable base body section 2b. A radial pressure chamber 18 that can be acted upon by a hydraulic medium is formed in the base body 9 . The pressure chamber extends over a circumferential angle of about 140° and, as in particular in 7 can be seen over almost the entire width of the base body 9.

A thin wall 19 is provided between the contact surface 16 and the radial pressure chamber 18, which can be elastically deformed by increasing the pressure in the radial pressure chamber 18 in order to apply the radial force to the adjustable base body section 2b. For this purpose, the actuating device 8 has clamping means which are designed to selectively bring about an increase in pressure in the hydraulic medium. In concrete terms, the clamping means, in this case a clamping screw 20 accessible from a radially outer peripheral surface of the base body 9 , are operatively connected to the radial pressure chamber 18 via a hydraulic medium supply channel 21 . The hydraulic medium supply channel 21 is connected to a circular-cylindrical storage area 22 for hydraulic medium, in which a piston 23 that can be moved via the clamping screw 20 is slidably arranged, so that screwing in the clamping screw 20 increases the pressure of the hydraulic medium.

To guide the clamping screw 20, the adjusting device 8 also includes a guide element 24, which is screwed onto the base body 9 radially on the outside and guides the clamping screw 20 or an actuating element introduced into it and designed as a hexagonal key 25 with a knurled nut 26.

The coupling device 1 also includes an adjustment device 27 which is suitable and designed to tilt the two receptacles 3, 4 relative to one another in order to adjust the angular position of the receptacle axes X1, X2 relative to one another. In the present case, the adjusting device is suitable for elastically deforming the adjustable base body section 2b such that its receiving axis X2 is tilted relative to the receiving axis X1 of the reference base body section by applying a bending moment to this deformable base body section 2b.

The elastic deformability of the base body section 2b is made possible by the fact that an annular circumferential groove 28 forming a solid body joint is provided in its radial outer surface.

In this groove 28, the adjustment device 27 is rotatably arranged. This has an annular base body 29 in which an axial pressure chamber 30 that can be acted upon by a hydraulic medium is formed. The axial pressure chamber has two pressure chamber sections 30a, 30b which are connected to one another. The axial pressure chamber is separated by a thin wall 32 from the end faces of the base body 31 resting on the side walls of the groove 28 . By increasing the pressure in the axial pressure chamber 30, the thin walls 32 are elastically deformed to apply an axial force to the main body portion 2b. The axial force applied eccentrically to the receiving axis X2 on the side walls of the groove 28 causes a bending moment on the base body section 2b, which leads to an elastic deformation, so that the two receptacles 3, 4 are tilted relative to one another.

The base body 29 is designed in two parts for insertion into the groove 28 and includes two peripheral sections 29a, 29b. These are inserted into the groove 28 and screwed together. As in particular in 9 As can be seen, two cylinder pins 33 are also provided, through which the two peripheral sections 29a, 29b of the base body 29 can be positioned relative to one another when inserted into the groove 28.

In the same way as the adjusting device 8, the adjusting device 27 also has a tensioning element which is designed to selectively cause a pressure increase in the hydraulic medium, the tensioning element 34 being operatively connected to the axial pressure chamber 30 via a hydraulic medium supply channel 35. The clamping element 34 includes an adjusting screw 36, which is accessible from a radially outer peripheral surface of the base body 29 and presently has an engagement possibility, into which an Allen key 37 with a knurled nut 38 is introduced for manual actuation. To guide the adjusting screw 36, a guide element 39 is provided, which is screwed onto a peripheral section 29b of the base body 29 radially on the outside.

If the coupling device 1 is to be used for aligning a tool or workpiece on a rotationally drivable spindle of a machine tool, the receptacle 3 of the base body section 2a must first be attached to the rotationally drivable spindle of the machine tool. In this case, a tool or workpiece can be attached to the receptacle 4 of the other base body section 2 b , in particular via a clamping device introduced into the receptacle 4 .

If the inserted tool or workpiece is to be aligned, the wobbling and concentricity error must first be determined. Suitable measuring devices can be attached to the tool or workpiece for this purpose. In a first step, the wobble error is corrected. For this purpose, the rotational position in which the highest wobble error occurs is determined and the adjustment device 27 is rotated accordingly about the receiving axis X2 of the base body section 2b, so that a bending moment to be applied to the base body section 2b counteracts the wobble error. In a next step, the adjusting screw 36 is turned in order to apply pressure to the hydraulic medium located in the axial pressure chamber 30 . As a result, an axial force is applied parallel to the receiving axis X2 on the side walls of the groove 28, which leads to an elastic deformation of the base body section 2b such that the receiving axis X2 is tilted relative to the receiving axis X1 and the wobbling error is counteracted. The axial force is specified by adjusting the pressure of the hydraulic medium in the axial pressure chamber 30 in such a way that the wobbling error is eliminated, and the axis of rotation of the tool or workpiece thus runs parallel to its central axis.

In a next step, the remaining concentricity error of the tool or workpiece relative to its axis of rotation is corrected. For this purpose, the size and direction of the concentricity error is determined using suitable measuring equipment. The adjusting device 8 is then rotated about the receiving axis X1 of the base body section 2a in such a way that the effective direction of a radial force to be applied counteracts the direction of the concentricity error. In a last step, the clamping screw 20 is turned in order to apply pressure to the hydraulic medium located in the radial pressure chamber 18, so that the base body section 2b is subjected to a radial force via the contact surface 16, which counteracts the concentricity error and compensates for it.

The method thus makes it possible to compensate for the wobble error and the concentricity error of a tool or workpiece independently of one another in a simple manner - fully automatically if necessary - and thus to ensure high-quality workpiece processing.

Reference List

1

coupling device

2

body

2a, 2b

body section

3, 4

recording

5

grooves

6

radial gap

7

spring elements

8th

adjusting device

9

base body

10

guide bar

11

guide ring

12

counter bridge

13

carrier elements

14

recess

15

clamping elements

16

contact surface

17

peripheral surface

18

radial pressure chamber

19

thin wall

20

clamping screw

21

hydraulic medium supply channel

22

storage area

23

Pistons

24

guide element

25

Allen key

26

knurled nut

27

adjustment device

28

groove

29

base body

29a, 29b

perimeter sections

30

axial pressure chamber

30a, 30b

pressure chamber sections

31

face

32

thin wall

33

cylindrical pin

34

clamping device

35

hydraulic fluid replenishment channel

36

adjustment screw

37

Allen key

38

knurled nut

39

guide element

X

central axis

X1, X2

recording axis

Claims (47)

Coupling device (1) for connecting two components coaxially, in particular for connecting a tool or a workpiece to a rotationally drivable spindle of a machine tool, with a base body (2) which has receptacles (3, 4) on its opposite end regions for fixing the two to be connected Has components that each define a receiving axis (X1, X2), the receiving axes (X1, X2) being coaxial or almost coaxial with one another and the position of the receiving axes (X1, X2) relative to one another being adjustable, the base body (2) having two base body sections (2a, 2b), on each of which a receptacle (3, 4) is provided for attaching a component, the two base body sections (2a, 2b) being resiliently connected to one another in such a way that they move relative to one another in a radial direction with respect to one of the receptacle axes (X1, X2) are adjustable and furthermore an adjusting device (8) is provided which is suitable and trained det is to adjust the base body sections (2a, 2b) in the radial direction relative to each other and thus to set a radial offset between the receiving axes (X1, X2), characterized in that an adjustment device (27) is also provided, which is suitable and designed to tilt the two recordings (3, 4) relative to one another in order to adjust the angular position of the recording axes (X1, X2) relative to one another. Coupling device (1) after claim 1 , characterized in that the adjusting device (8) is held radially firmly on one base body section (2a) - the reference base body section - and is suitable for applying a force to the other - the adjustable base body section (2b) - with a force relative to one of the receiving axes (X1 , X2) to apply the radial direction of action in order to move the adjustable base body section (2b) relative to the reference base body section. Coupling device (1) after claim 2 , characterized in that the two base body sections (2a, 2b) engage with each other to form a radial gap (6) and the two base body sections (2a, 2b) by spring elements (7) which bridge the radial gap (6) and - in particular radially - extend between the base body sections (2a, 2b), are connected to one another. Coupling device (1) after claim 3 , characterized in that the reference base body section (2a) forms the radially inner base body section and the adjustable base body Section (2b) forms the radially outer main body section. Coupling device (1) after claim 3 or 4 , characterized in that the adjusting device (8) is arranged to be rotatable relative to the reference base body section (2a) about its receiving axis (X1, X2) in order to be able to adjust the effective direction of the radial force. Coupling device (1) after claim 5 , characterized in that the adjusting device (8) is held radially fixed by support means on the reference base body section. Coupling device (1) after claim 6 , characterized in that the adjusting device (8) has an annular base body (9). Coupling device (1) after claim 7 , characterized in that the base body (9) carries an axially projecting, in particular circumferential guide bar (10) on each of its two end faces, and the support means comprise two guide rings (11) which are fastened to the reference base body section (2a) and to the guide bars (10) have corresponding counter-webs (12) which rest radially on the associated guide web (10) in order to position the base body (9) radially. Coupling device (1) after claim 8 , characterized in that carrier elements (13) are arranged on the reference base body section (2a) in two axially offset rows relative to its receiving axis (X1, X2) and are distributed over the circumference, which radially pass through the adjustable base body section (2b) and over it protrude, wherein in each case a guide ring (11) is fastened or can be fastened to a row of carrier elements (13). Coupling device (1) after claim 9 , characterized in that the guide rings (11) are screwed or can be screwed to the carrier elements (13). Coupling device (1) after claim 9 or 10 , characterized in that the carrier elements (13) are formed in one piece with the reference base body section (2a) or attached to it, in particular screwed on. Coupling device (1) according to one of claims 9 until 11 , characterized in that each row of carrier elements (13) has at least four and/or at most ten carrier elements (13) distributed over the circumference. Coupling device (1) according to one of Claims 8 until 12 , characterized in that at least one, in particular several clamping elements (15) distributed over the circumference are provided, which clamp around the two guide rings (11) axially from the outside in order to counteract the guide rings (11) breaking out in the axial direction. Coupling device (1) according to one of Claims 7 until 13 , characterized in that the base body (9) has a contact surface (16) which bears against a peripheral surface (17) of the adjustable base body section (2b), and in the base body (9) a radial pressure chamber (18) which can be acted upon by a hydraulic medium. is formed, wherein between the contact surface (16) and the radial pressure chamber (18) a thin wall (19) is provided which is elastically deformable by increasing the pressure in the radial pressure chamber (18) to the radial force to apply the adjustable body section (2b). Coupling device (1) after Claim 14 , characterized in that the radial pressure chamber (18) extends over a circumferential angle of at least 90°, in particular at least 120° and/or at most over 180°, in particular at most 160°, preferably over a circumferential angle of 140°. Coupling device (1) after Claim 14 or 15 , characterized in that the adjusting device (8) has clamping means which are designed to cause an optional increase in pressure in the hydraulic medium, the clamping means being operatively connected to the radial pressure chamber (18) via a hydraulic medium supply channel (21). Coupling device (1) after Claim 16 , characterized in that the clamping means comprise a clamping screw (20) which is accessible from a radially outer peripheral surface of the base body (9). Coupling device (1) after Claim 17 , characterized in that the clamping screw (20) for turning an engagement possibility for an actuating means, in particular an Allen key or external key (25). Coupling device (1) according to one of Claims 7 until 18 , characterized in that the base body (9) was produced by means of an additive manufacturing process, in particular by means of selective laser melting. Coupling device (1) according to one of the preceding claims, characterized in that that the adjusting device (27) is suitable for elastically deforming one of the two base body sections (2b) in such a way that its mounting axis (X2) is tilted relative to the mounting axis (X1) of the other base body section (2a). Coupling device (1) after claim 20 , characterized in that the adjusting device (27) is suitable for applying a bending moment to the deformable base body section (2b) in order to deform it elastically. Coupling device (1) after Claim 21 , characterized in that the adjusting device (27) is suitable for applying an axial force acting eccentrically to the receiving axis (X2) in order to generate the bending moment. Coupling device (1) after Claim 22 , characterized in that the adjustment device (27) can be rotated about the receiving axis (X2) of the deformable base body section (2b) in order to be able to adjust the position of application of the axial force. Coupling device (1) after Claim 23 , characterized in that the deformable base body section (2b) is ring-shaped and in its radial outer surface a ring-shaped peripheral groove (28) forming a solid body joint is provided, in which the adjusting device (27) is arranged. Coupling device (1) after Claim 24 , characterized in that the adjusting device (27) has an annular base body (29), in which an axial pressure chamber (30) that can be acted upon by a hydraulic medium is formed, with between at least one end face (31) of the base body (29), which a side wall of the groove (28), and the axial pressure chamber (30) is provided with a thin wall (32) which can be elastically deformed axially by increasing the pressure in the axial pressure chamber (30) in order to absorb the axial force to apply the base body section (2a, 2b). Coupling device (1) after Claim 25 , characterized in that the axial pressure chamber (30) extends over a circumferential angle of at least 30° and/or at most 90°, preferably over an angle of 60°. Coupling device (1) after Claim 25 or 26 , characterized in that a tensioning element (31) is provided in the adjusting device (27), which is designed to selectively bring about an increase in pressure in the hydraulic medium, the tensioning element (34) being connected to the axial pressure chamber via a hydraulic medium supply channel (35). (30) is operatively connected. Coupling device (1) after Claim 27 , characterized in that the clamping member (34) comprises an adjustment screw (36) which is accessible from a radially outer peripheral surface of the base body (29). Coupling device (1) after claim 28 , characterized in that the adjusting screw (36) for turning an engagement possibility for an actuating means, in particular an Allen key or external key (37). Coupling device (1) after claim 29 , characterized in that the base body (29) is designed to be divided into the groove (28) and comprises a plurality of peripheral sections (29a, 29b) which can be inserted into the groove (28) and can be or are connected to one another, in particular by means of a screw connection, at least one peripheral section (29a, 29b) of the base body (29) being produced in particular by means of an additive manufacturing process, preferably by means of selective laser melting. Coupling device (1) according to one of the preceding claims, characterized in that the base body (2) is constructed in one piece. coupling device Claim 31 , characterized in that the base body (2) was produced by means of an additive manufacturing process, in particular by means of selective laser melting. Coupling device (1) according to one of the preceding claims, characterized in that the receptacles (3, 4) formed in the base body sections (2a, 2b) are designed as a recess which is open towards the end faces facing away from one another, in particular with a circular cross-section for introducing a rotationally symmetrical, in particular wavy component are formed. Coupling device (1) according to one of the preceding claims, characterized in that coupling means (5) are provided on the base body sections (2a, 2b) in order to be able to form a shaft-hub connection with a component to be attached to the respective receptacle. Arrangement for aligning a tool or a workpiece on a rotationally drivable spindle of a machine tool, comprising: a coupling device (1) according to one of Claims 1 until 34 , wherein one receptacle (3, 4) is designed as a drive-side receptacle and is connected to the rotationally drivable spindle and the other receptacle (3, 4) is designed as a driven-side receptacle, to which the tool or workpiece is attached, and measuring means for detection the concentricity properties of the tool or the workpiece. arrangement according to Claim 35 , characterized in that the measuring means are suitable for detecting the wobbling error and the concentricity error of the tool set in rotation or of the workpiece. arrangement according to Claim 36 , characterized in that the measuring means comprise two dial gauges which are axially spaced apart from one another in relation to the drive-side receiving axis (X1, X2) and which rest or can be brought into contact with the outer contour of the tool or workpiece in order to measure the wobbling error and the concentricity error of the tool set in rotation or to detect the workpiece. Arrangement according to one of Claims 35 until 37 , characterized in that a clamping device for clamping the tool or workpiece is attached to the output-side receptacle. arrangement according to Claim 38 , characterized in that the clamping device is designed as a hydraulic expansion chuck or as a multi-jaw chuck, in particular as a three-jaw chuck. Arrangement according to one of Claims 35 until 39 for automated alignment, the coupling device (1) according to Claim 18 and 29 is formed and also actuating means are provided, which can be brought into engagement with the clamping means and the clamping member (34). Method for aligning a tool or workpiece on a rotatably drivable spindle of a machine tool, comprising the following steps: providing an arrangement according to one of Claims 35 until 40 with a tool or workpiece inserted in the output-side mount in a rotationally fixed manner; Tilting the two receptacles relative to one another by actuating the adjustment device (27) in order to compensate for the wobbling error of the tool or workpiece set in rotation; Adjusting the receiving axes in the radial direction relative to one another by actuating the adjusting device (8) in order to compensate for the concentricity error of the tool or workpiece set in rotation. procedure after Claim 41 , characterized in that the wobbling error is determined before the setting device (27) is actuated. procedure after Claim 42 , characterized in that the determination of the wobble error includes both the determination of the size of the wobble error and the determination of the orientation of the wobble error. procedure after Claim 43 , characterized in that the actuation of the adjusting device (27) comprises adjusting the direction of the tilting corresponding to the orientation of the wobbling error and adjusting the magnitude of the tilting angle of the main body section corresponding to the magnitude of the wobbling error. Procedure according to one of Claims 41 until 44 , characterized in that the concentricity error is determined before the actuating device (8) is actuated. procedure after Claim 45 , characterized in that the determination of the run-out includes the determination of the magnitude and the direction of the run-out. procedure after Claim 46 , characterized in that the actuation of the adjusting device (8) includes setting the direction of the adjustment of the receiving axes relative to one another corresponding to the direction of the concentricity error and setting the size of the adjustment path corresponding to the size of the concentricity error.

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