Device for measuring concentricity of internal toothing of component, in particular shaft, and method for cleaning component, in particular internal toothing of component

Abstract

The invention relates to a device (1) for measuring the concentricity of a component (20), in particular of an internal toothing (22) of a shaft, and to a method for cleaning a component using a device according to the invention, comprising at least one determination section (2) for determining a concentricity deviation, comprising: a spindle unit (4) comprising a measuring spindle (5) and an output spindle (6), the measuring spindle (5) has a standard gear (13) arranged at a first end thereof for measuring the concentricity of the internal toothing (22) of the component (2), and the output spindle (6) for transmitting the measured concentricity from the measuring spindle (5) to the measuring unit (15), the output spindle (6) being arranged directly or indirectly at a second end of the measuring spindle (5) opposite the first end of the measuring spindle (5); and a spindle support (7) at least for holding and positioning the measuring spindle (5) or the output spindle (6), advantageously for holding and positioning the spindle unit (4); an adjusting element (14) at least for positioning a standard gear (13) at least connected to the measuring spindle (5); and a measuring unit (15) for comparing the measured concentricity with a reference value; wherein the measuring spindle (5) has a spindle unit longitudinal axis (30), the standard gear (13) comprises a bore for receiving on the measuring spindle (5), and the device is equipped with a compressed air cleaning device.

Description

Technical Field

[0001] The invention relates to a device for measuring the concentricity of the internal toothing of a component, in particular a shaft, according to the preamble of claim 1, and a method for cleaning the internal toothing of a component, in particular a shaft, using the device according to the invention, according to the preamble of claim 13. Background Art

[0002] A device of the aforementioned type is known, for example, from DE 10 2017 215 285 A1.

[0003] The aforementioned equipment for establishing concentricity measurements primarily consists of a high-precision measuring spindle with a master gear mounted on a rocker arm. The rocker arm's articulated joint is formed by a spring joint, which is extremely rigid and allows movement almost exclusively in the desired plane. Alternatively, the rocker arm could be supported via a precisely supported rotating shaft. The measuring force for the measurement is applied by a spring joint, a spring, or a pneumatic cylinder. The other end of the rocker arm is equipped with a pneumatic cylinder and a measuring sensor. The pneumatic cylinder should enable axial insertion of the master gear. The pneumatic cylinder is actuated, deflecting the rocker arm. The force of the pneumatic cylinder is slightly greater than that of the spring joint, lifting the measuring spindle with the master gear. The entire unit is then inserted into a bore with internal toothing. The pneumatic cylinder is then exhausted, and the master gear engages the toothing due to the force of the spring joint. After the component completes one full rotation, the concentricity error can now be determined using the measured values ​​of the measuring sensor. The measurement reference for concentricity measurement must be generated mechanically using a roller prism or electronically using a measuring sensor.

[0004] When measuring with these measuring devices, so-called "false rejections" often occur due to contamination. This contamination originates primarily from the (upstream) tooth machining process and is not completely removed by the downstream cleaning process. This often involves fine material debris, which deposits on the tooth flanks and negatively influences the tooth concentricity measurement result.

[0005] In previous methods, after the tooth machining process, particularly after non-cutting tooth machining (where the forming punch is pressed through the workpiece / shaft), a cooling lubricant emulsion and air are sprayed under pressure into the tooth using a spray gun for cleaning. The concentricity measurement is then performed as a separate process. This method has residual uncertainties regarding possible material and / or contamination residues. Even very fine metal chips cannot be completely removed using conventional methods. This leads to problems in the subsequent concentricity measurement due to "false rejections."

[0006] Special studies of components, such as rotor shafts, that were rejected after grinding and 100% measurement have revealed the presence of residual dirt particles in the toothing of these shafts. These residual dirt particles negatively influence or distort the measurement results. After cleaning the internal toothing with compressed air, the concentricity deviations of the toothing were found to be within the permissible tolerance range for several components, such as rotor shafts, that had previously been rejected. Summary of the Invention

[0007] The present invention is based on this and has the object of proposing an improved device for concentricity measurement, in particular a device for concentricity measurement that is suitable for reducing “false rejections”.

[0008] According to the present invention, this object is achieved by a device for concentricity measurement having the characterizing features of claim 1. Because the device for concentricity measurement is equipped with a compressed air cleaning device, the aforementioned problem can be solved or at least alleviated. In particular, "false rejections" can be reduced. The compressed air cleaning device is preferably an integrated component of the device.

[0009] False rejections during grinding should be significantly reduced in this way, and manual remachining of the shaft using compressed air should be dispensed with, thereby making the production process more efficient and reducing rejection costs and thus unit costs.

[0010] In particular, holes formed in the tip and / or root circles of the master gear enable the tooth flanks of the component, in particular the internal toothing of a shaft, to be measured, to be cleaned indirectly via the master gear using compressed air, in particular by deflecting, redirecting, and / or flowing the airflow through a nozzle. The compressed air is preferably supplied via a spindle unit, which is at least partially hollow, on which the master gear is arranged. The spindle unit can, for example, include a measuring spindle and an output spindle. The compressed air can be supplied via the spindle unit, in particular directly from the outside into the measuring spindle, or from the outside into the output spindle and then via the measuring spindle. In particular, it can be provided that the compressed air can be introduced into the spindle unit axially or radially.

[0011] For this purpose, a gas supply channel and a gas discharge channel are provided in the spindle unit, in particular in the measuring spindle. This allows air to be introduced into the master gear via the measuring spindle, so that compressed air can be applied to multiple tooth segments or just a few. The gas supply channel is preferably designed as a central through-hole in the measuring spindle.

[0012] The gas outlet opening and the gas guide channel are preferably designed such that oil-containing compressed air can be used, thereby also allowing lubrication of the master gear at the same time.

[0013] A favorable design of the gas guide, particularly with regard to the gas outlet opening and / or gas guide channel, can also improve the repeatability of the concentricity measurement, since an air bearing is formed between the measuring spindle and the master gear. Ideally, oil-containing compressed air should be used to lubricate the master gear on the journal.

[0014] Further advantageous embodiments of the proposed invention are particularly apparent from the features of the dependent claims. The technical solutions or features of the individual claims can in principle be combined with one another in any desired manner.

[0015] In an advantageous embodiment of the present invention, the measuring spindle can be equipped with a journal for rotatably or fixedly receiving a master gear, and / or the measuring spindle can be configured to rotatably or fixedly receive a master gear. In the case of rotatably receiving the master gear, the journal forms a bearing seat for the master gear. Preferably, a sliding bearing is formed between the bore of the master gear and the journal. In the case of a fixed connection between the measuring spindle and the master gear, a fixed connection is formed between the journal and the master gear. The master gear can also be directly rotatably or fixedly mounted on the measuring spindle.

[0016] In another advantageous embodiment of the present invention, the compressed air cleaning device can be included in a gas duct in the device, in particular in the measuring spindle, the output spindle, and / or the master gear. This gas duct is primarily used to deliver compressed air or oil-laden compressed air to the area to be cleaned. The gas duct thus forms an integral component of the device, in particular of the measuring spindle or the measuring spindle and the output spindle. The gas duct extends, in particular, "through" the spindle into the master gear, i.e., in particular through the measuring spindle, the output spindle, and / or the master gear.

[0017] In another advantageous embodiment of the present invention, the compressed air cleaning device, in particular its gas supply, may include at least a gas supply channel arranged in the measuring spindle, a gas outflow channel arranged in the measuring spindle, a gas outlet channel arranged in the mastering gear, and / or a gas outlet opening arranged in the mastering gear. The gas supply may include various components that are integrated into the respective components of the device, for example, the measuring spindle and / or the mastering gear.

[0018] In another advantageous embodiment of the present invention, one or more gas-conducting channels may be provided within the measuring spindle, and / or the one or more gas-conducting channels may be oriented straight or obliquely relative to the longitudinal axis of the spindle unit, and / or the one or more gas-conducting channels may be designed to have a constant cross-section over their length, to be conical, or to have stepped sections. This design of the one or more gas-conducting channels can influence the flow characteristics of the medium flowing through them. For example, a nozzle effect can be achieved in this case. The compressed air can also be distributed among multiple gas-conducting channels.

[0019] In another advantageous embodiment of the invention, provision can be made for one or more gas outflow channels to be provided in the measuring spindle, in particular in a journal of the measuring spindle, and / or for the one or more gas outflow channels to be oriented radially or obliquely relative to the longitudinal axis of the spindle unit.

[0020] This makes it possible to achieve optimized flow characteristics, particularly with respect to the transition to the master gear. A channel for the root circle supply and / or a channel for the tip circle supply can also be provided. Furthermore, a selective supply of compressed air can be provided, particularly when more than one gas-conducting channel is provided in the spindle unit. This allows different pressures to be applied to the root circle supply and / or the tip circle supply.

[0021] In another advantageous embodiment of the invention, provision can be made for a circumferential or at least partially circumferential groove to be provided in the journal, into which the one or more gas outlet channels open. This groove can be used to improve the distribution of compressed air to the individual gas outlet channels of the master gear.

[0022] In another advantageous embodiment of the present invention, gas outlet channels can be arranged in the master gear, extending from the opening toward the tooth tips, tooth flanks, and / or tooth roots of the master gear. The gas outlet channels convey the compressed air toward preferred locations on the master gear's toothing. The gas outlet openings are located at the specific locations on the master gear's toothing.

[0023] In another advantageous embodiment of the present invention, the gas outlet openings can be arranged at the end of the gas outlet channel in the tooth tips, tooth flanks, and / or tooth roots of the master gear. This allows compressed air to be directed to areas of the component's internal toothing that are highly contaminated due to previous machining processes and / or where contamination would significantly affect the actual measurement. This can vary depending on the type of previous machining.

[0024] In another advantageous embodiment of the present invention, the compressed air cleaning device, in particular the gas guide, in particular the master gear, can be designed so that compressed air is applied only to the tooth gaps of the master gear that are about to come into contact with and / or are in contact with the internal toothing to be measured. This measure produces a particularly good cleaning effect. This measure can be achieved structurally by aligning the gas outflow channel appropriately with respect to the locations expected to come into contact with or be in contact with the internal toothing to be measured.

[0025] In another advantageous embodiment of the present invention, it can be provided that the gas outlet openings on the master gear are designed as round gas outlet openings, oval gas outlet openings, in particular converging gas outlet openings or rectangular gas outlet openings. By these measures, the inflow characteristics to the area to be cleaned can also be influenced.

[0026] In another advantageous embodiment of the invention, it can be provided that the master gear comprises a circumferential or at least partially circumferential groove in the region of engagement with the shaft journal, thereby enabling improved compressed air distribution.

[0027] A further object of the present invention is to provide an advantageous method for cleaning an internal toothing using the device according to the invention for measuring concentricity.

[0028] According to the present invention, the proposed method includes the following method steps: cleaning, in particular, blowing out, the internal gearing using a compressed air cleaning device. Clearly, the cleaning process can be performed almost simultaneously with the measurement. This means that at least the method step of cleaning outside the actual measuring device can be omitted. However, actual cleaning prior to measurement should still be retained. However, the integrated compressed air cleaning device can remove residual particles and thus minimize false rejections. This clearly saves time and costs while also avoiding measurement errors.

[0029] Further advantageous embodiments of the proposed invention are particularly apparent from the features of the dependent claims. The technical solutions and features of the individual claims can in principle be combined with one another in any desired manner.

[0030] In an advantageous embodiment of the present invention, provision can be made for the component, in particular the internal toothing of a shaft, to be cleaned during the measurement process, in particular directly after the tooth machining process. As already mentioned, this saves time and costs. Errors can also be avoided because the component to be measured remains on the device after cleaning and can be measured directly.

[0031] In another advantageous embodiment of the invention, it can be provided that the cleaning is carried out using compressed air or oil-containing compressed air, in particular by blowing the internal toothing with compressed air or oil-containing compressed air. Dirt can be cleaned or blown away by the compressed air. Furthermore, the oil-containing compressed air can be used to wet the surface with a lubricant and lubricate it accordingly. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Other features and advantages of the present invention will become apparent from the following description of preferred embodiments in conjunction with the accompanying drawings. In the drawings:

[0033] Figure 1 An embodiment of an exemplary device for concentricity measurement according to the prior art is shown in a side cross-sectional view, wherein the master gear is in a non-operating position;

[0034] Figure 2 A perspective view of the device Figure 1 The embodiment shown;

[0035] Figure 3 A side cross-sectional view of a device for concentricity measurement Figure 1 and Figure 2 The embodiment shown, in which the master gear is in the retracted position;

[0036] Figure 4 A perspective view of the device Figure 3 The illustrated embodiment;

[0037] Figure 5 A side cross-sectional view of a device for concentricity measurement Figures 1 to 4 The embodiment shown, in which the master gear is in the engaged position;

[0038] Figure 6 A side cross-sectional view of a device for concentricity measurement Figures 1 to 5 The embodiment shown, in which the master gear is in the retracted position;

[0039] Figure 7 A side cross-sectional view of a device for concentricity measurement Figures 1 to 6 The embodiment shown, in which the master gear is in the engaged position;

[0040] Figure 8 An embodiment of a measuring spindle, a standard gear, and a pressure cleaning device of an apparatus for concentricity measurement according to the present invention is shown;

[0041] Figure 9-17 Other embodiments of the measuring spindle, the master gear, and the pressure cleaning device of the apparatus for concentricity measurement according to the present invention are shown;

[0042] Figure 18 (ac) shows one embodiment of a master gear used in the apparatus for concentricity measurement according to the present invention in different views;

[0043] Figure 19(ac) show another embodiment of a master gear used in the device for concentricity measurement according to the present invention in different views;

[0044] Figure 20 (ac) shows another embodiment of a master gear used in the device for concentricity measurement according to the present invention in different views;

[0045] Figure 21 (ac) show another embodiment of a master gear used in the device for concentricity measurement according to the present invention in different views;

[0046] Figure 22 One embodiment of an apparatus for concentricity measurement is shown in side cross-section;

[0047] Figure 22a A cross-sectional view showing one embodiment of a measuring spindle of an apparatus for concentricity measurement;

[0048] Figure 22b A cross-sectional view showing another embodiment of a measuring spindle of a device for concentricity measurement;

[0049] Figure 23 Another embodiment of a master gear for the device for concentricity measurement according to the present invention is shown;

[0050] Figure 24 One embodiment of a device for concentricity measurement is shown in a side sectional view.

[0051] The following reference numerals are used in the drawings:

[0052] 1 device

[0053] 2 Determine the segment

[0054] 3. Component receiving section

[0055] 4 spindle units

[0056] 5. Measure the spindle

[0057] 6 output spindles

[0058] 6.1 Support section

[0059] 7. Spindle bracket

[0060] 8Spindle support support

[0061] 9 Spindle support base

[0062] 10 board segments

[0063] 10.1 First plate section

[0064] 10.2 Second plate segment

[0065] 11 load-bearing rod

[0066] 11.1 First load-bearing bar

[0067] 11.2 Second load-bearing bar

[0068] 12 slides

[0069] 13 standard gears

[0070] 14Regulator

[0071] 15 measuring units

[0072] 16 holding platform

[0073] 17 Support element

[0074] 18 rotation points

[0075] 19 Rotation axis

[0076] 20 components

[0077] 21 recess

[0078] 22 internal teeth

[0079] 30 spindle unit longitudinal axis

[0080] 31 longitudinal axis of component

[0081] 32 Rotation axis of standard gear

[0082] Horizontal center line (symmetry axis) of 332 standard gear

[0083] 101 gas guide channel

[0084] 102 gas outflow channel

[0085] 103 gas exhaust channel

[0086] 104 gas outlet

[0087] 104a Gas exhaust port (on the spindle)

[0088] 105 journal

[0089] 106 Receiving area for standard gear

[0090] 107 Compressed air feed inlet or feed inlet for oil-containing compressed air

[0091] 108 Measure the surrounding groove of the main shaft

[0092] Circumferential groove of 109 standard gear

[0093] 111 grooves

[0094] 131 (standard gear) hole

[0095] 101a first section

[0096] 101b Second section

[0097] 101c Section 3

[0098] A1 first cross section

[0099] A2 second cross section

[0100] A3 third cross section DETAILED DESCRIPTION

[0101] Here, the features and details described in conjunction with the method are of course also applicable in conjunction with the device according to the invention and vice versa, so that the disclosures of the various inventive aspects always refer to each other or can refer to each other. In addition, the method according to the invention, if applicable, can be implemented using the device according to the invention.

[0102] The terms used herein are only used for the purpose of describing specific embodiments and should not limit the present disclosure. As used herein, the singular forms "a" and "the" also include plural forms, unless the context clearly indicates otherwise. In addition, it is clear that when the expressions "having" and / or "including" are used in this specification, they specify the presence of the features, integers, steps, operations, elements and / or components mentioned, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or their combinations. As used herein, the expression "and / or" includes each arbitrary combination and all combinations of one or more elements in the associated listed elements.

[0103] exist Figures 1 to 7 An exemplary embodiment of a device 1 for measuring the concentricity of an internal toothing 22 of a component 20 (for example a shaft shown here) is shown in FIG. Figures 1 to 7 The device 1 shown and described in the accompanying drawings for measuring the concentricity of an internal toothing 22 of a component 20 is a device according to the prior art, in particular according to DE 10 2017 215 285 A1.

[0104] The device 1 comprises a fixing section 2 and a component receiving section 3. The fixing section 2 has a spindle unit 4, which comprises a measuring spindle 5 and an output spindle 6. The measuring spindle 5 is arranged or received in a spindle support 7, in particular in a spindle support bearing 8, so as to be rotatable about the longitudinal axis 30 of the spindle unit. For this purpose, it is conceivable that the spindle support bearing 8 comprises a bearing element, such as a sliding bearing, a rolling bearing or a stabilizer (not shown here). However, it is also possible that the measuring spindle 5 is at least partially rotatably arranged in the output spindle 6, as in Figure 1、 Figure 3 、 Figure 5 、 Figure 6 and Figure 7 As can be seen in , the output spindle 6 thus forms a bearing section 6.1 for supporting the rotatable output spindle 5. The spindle support bearing 8 is advantageously designed with a rectangular parallelepiped geometry, but can also have a cylindrical shape. Important for the spindle support bearing 8 is at least the design of a through-hole or one or more recesses or depressions, which enable the arrangement of the spindles, particularly the measuring spindle 5, and the output spindle 6. Advantageously, the bearing element for supporting the rotatable measuring spindle 5 is arranged in such a hole, particularly a portion of such a through-hole or continuous recess, or in one of the recesses. The output spindle 6 is advantageously connected to the spindle support bearing 8 in a rotationally fixed manner. Advantageously, the output spindle 6 is clamped or pressed into the spindle support bearing 8, particularly into a recess provided for this purpose, or is connected to the spindle support bearing 8 in some other manner with a force-fitting, form-fitting, or material-locking fit. A master gear 13 is arranged at the distal end or axial end of the measuring spindle 5. The master gear 13 can also be referred to as a reference gear. This axial end lies opposite the axial end of the measuring spindle 5 at which it is connected to the spindle support bearing 8. Advantageously, the master gear 13 is press-fitted onto the measuring spindle 5. However, it is also conceivable that the master gear 13 is connected to the measuring spindle 5 in some other manner, such as by force-fitting, form-fitting, or even material-fitting. However, when the master gear is press-fitted, an air bearing is no longer formed between the bearing journal and the master gear. The spindle support bearing 8 is connected to the spindle support base 9 of the spindle support 7. The spindle support base 9 may, for example, have intersecting plate segments 10, in particular two intersecting plate segments 10.1 and 10.2, or intersecting support rods 11, in particular two intersecting support rods 11.1 and 11.2, arranged in two planes. The spindle support base 9 may also be constructed as plate segments or support rods arranged in a parallelogram. When two intersecting plate segments 10 are used, one plate segment 10, for example, the first plate segment 10.1, extends through an opening (not shown here) in the other plate segment, particularly the second plate segment 10.2. Advantageously, at least one plate segment 10, particularly advantageously the first plate segment 10.1, and advantageously both plate segments 10, are spring-elastic plate segments 10, for example, made of spring steel. Each plate segment 10 extends in a plane that is both perpendicular to the longitudinal axis 30 of the spindle unit and extends in the vertical direction. The plate segments 10 themselves extend vertically within this plane, inclined at a defined angle.

[0105] In the configuration where the support rod 11 is used as the spindle support base 9 instead of the plate segment structure 10, as in Figure 1As shown schematically in FIG, two support bars 11.1 and 11.2 are arranged in each of at least two planes, only one of which is visible here. The support bars 11.1 and 11.2 of each plane intersect at a coupling point or rotation point 18. Each support bar 11 is connected to the spindle support 8 and the bottom element (such as Figures 1 to 7 The support rods 11 extend vertically at an angle defined between the carriages 12 shown. Advantageously, at least one of the support rods 11 in each plane, particularly advantageously the first support rod 11.1 or both support rods 11.1 and 11.2, has a spring joint to enable elastic bending or deformation of the support rod 11 and, thus, a substantially continuously adaptive pivoting of the spindle unit 4 about the rotation axis 19 during movement of the device 1. The support at the rotation point 18 can also be described as a rocker arm support or a support on balls loaded on two individual springs. This ensures a certain degree of playlessness. It is also conceivable to form a joint at the rotation point 18, about which at least the upper V-shaped portion of the support rod 11 can be rotated or tilted. To this end, the lower portion of the support rod 11 is also configured as an inverted V, so that the two support rod parts converge at the rotation point 18. In this embodiment, it is conceivable to configure the rotation axis 19 as a fixed, i.e., immovable, rotation axis. This allows for highly precise and play-free support of the rotation axis.

[0106] Due to the movement of the carriage 12 along the longitudinal axis 30 of the spindle unit, the entire spindle support 7 is also moved. This movement enables the desired or required rotation axis 19 of the spindle unit 4 (e.g. Figure 1 ). Advantageously, the oscillation or deflection of the output spindle 6 can also be set or adjusted by moving the carriage 12. The carriage 12 advantageously runs in a linear guide (not shown here) which also extends along the longitudinal axis 30 of the spindle unit.

[0107] Furthermore, the determining section 2 has an adjusting element 14 and a measuring unit 15, each of which is operatively connected to the output spindle 6. The adjusting element 14 is, for example, a cylinder (e.g. a pneumatic cylinder) or an electric actuator (e.g. a crank drive, a worm spindle or a loaded worm drive) and serves to move the spindle unit 4 and therefore the master gear 13 connected thereto from a non-operating position (e.g. Figure 1 and Figure 2 or Figure 6 as shown) to the moved-in position (as shown Figure 3 and Figure 4 ) and moves from the retracted position to the engaged position (as shown Figure 5 and Figure 7As shown). The measuring unit 15 is, for example, a measuring probe which detects the deflection transmitted from the standard gear 13 via the measuring spindle 5 to the output spindle 6 when measuring the concentricity of the internal toothing 22 of the component 20. It is conceivable that Figures 1 to 7 As shown, the measuring unit 15 and the adjusting element 14 are arranged on a holding table 16. The holding table 16 is preferably movable in the direction of the spindle longitudinal axis 30. Particularly advantageously, the holding table 16 can be moved in more than one degree of freedom and can also be moved horizontally, perpendicularly to the spindle unit longitudinal axis, and / or vertically and / or tilted, in particular tilted forward and / or laterally. It is conceivable that the carriage 12 is arranged on the holding table 16 and advantageously movable thereon in the spindle unit longitudinal direction 30.

[0108] according to Figures 1 to 7 The device 1 further comprises a component receiving section 3 for receiving a component 20 and holding it in a defined position, advantageously allowing the component to be rotated about its component longitudinal axis 31. The component receiving section 3 comprises at least one support element 17, advantageously two support elements 17, which are designed to be spaced apart from one another as viewed in the direction of the component longitudinal axis 31, in order to enable a sufficiently process-reliable support of the component 20.

[0109] like Figure 1 、 Figure 2 and Figure 6 As shown, the spindle unit 4 and therefore the master gear 13 are in the rest position. In this position, the spindle unit 4 is not deflected and the master gear 13 is not engaged with the internal toothing 22 of the component 20 to be measured. Figure 3 and Figure 4 By operating the adjusting element 14, ie by activating or deactivating the adjusting element 14 (depending on what tool is selected as the adjusting element), the spindle unit 4 is deflected, ie about a preferably non-stationary rotation axis 19 (eg Figure 1 Schematically shown) is moved or pivoted. As a result, the master gear 13 is moved upwards essentially in the vertical direction, in particular lifted. After the spindle unit 4 has completed its pivoting, the holding table 16 is advantageously activated to carry out the movement along the spindle unit longitudinal axis 30 in the direction of the component receiving section 2. As a result, the master gear 13 is introduced into the recess 21 of the component 20, in which the internal toothing 22 to be measured is formed. After the master gear 13 has been positioned in the retracted position and introduced into the recess 21 of the component 20, as shown in FIG. Figure 3 and Figure 4 As shown, the spindle unit 4 is pivoted again. This pivoting of the spindle unit 4 is again achieved by the adjusting element 14, which is activated or deactivated depending on the tool configuration. During the pivoting, the spindle unit 4 and therefore the master gear 13 are moved from the retracted position to the engaged position, as shown in FIG. Figure 5 and Figure 7 As shown. Here again, a movement occurs, in particular of the spindle unit about a non-stationary rotation axis 19 (e.g. Figure 1 Schematically shown) tilted, so that the master gear 13 moves downward in the vertical direction. After the movement is performed, the master gear 13 is advantageously engaged with its toothing in a part of the internal toothing 22 of the component 20, as also shown in FIG. Figure 5 and Figure 7 shown.

[0110] It is conceivable that the master gear 13 engages with the inner toothing 22 of the component 20 in such a way that the master gear is supported on the lower region of the inner toothing 22 viewed in the vertical direction solely by its weight or advantageously in combination with spring forces or the force of the electric drive of the spindle support base 9 in order to have the required contact pressure. Figure 5 It can be seen in Figure 7 An alternative to this is shown in FIG. In this construction, the master gear 13 is engaged with the inner toothing 22 of the component 20 in such a way that, viewed in the vertical direction, the master gear engages in the upper region of the inner toothing 22. For this purpose, a corresponding pressing pressure needs to be generated. The pressing force of the master gear 13 required for this is generated, for example, by means of the effective cooperation of the spindle support 7, in particular the spindle support base 9, and the adjusting element 14, which can exert a defined tensile force on the spindle unit 4 and thus on the output spindle 6. As the master gear 13 is arranged in the lower region of the inner toothing 22, before the master gear 13 is placed, the spindle unit 4 needs to be adjusted as follows. Figure 6 The support element 17 is deflected or pivoted out of the rest position shown. Furthermore, the entire holding table 16 can also be moved vertically upwards to enable process-reliable engagement of the master gear 13 with the internal toothing 22. Furthermore, it is advantageous to arrange the support element 17 above the arranged component 20 in order to achieve a defined counterpressure when applying contact pressure to the internal toothing 22 via the master gear 13, at least during the measurement process. The support element 17 can be designed as a stabilizing bracket.

[0111] It should therefore be pointed out that for determining the concentricity of the internal toothing 22 , in particular for the concentricity error of the internal toothing 22 of the detection component 20 , it is not important in which part of the internal toothing 22 , viewed in the circumferential direction, the master gear 13 meshes with the internal toothing 22 .

[0112] Reference below Figures 8 to 17 as well as Figure 18 (ac) to Figure 21 (ac).

[0113] According to the invention, it is provided that the device for concentricity measurement is equipped with a compressed air cleaning device.

[0114] The measuring spindle 5 preferably has a journal 105 , in particular a bearing journal, for rotatably, optionally also fixedly, receiving the master gear 13 . The measuring spindle 5 or the journal 105 is preferably equipped with a receiving area 106 for the master gear 13 .

[0115] The following definitions of terms should be used next.

[0116] Within the meaning of the present invention, the term "gas line" is understood to mean the entire compressed air path (including oil-containing compressed air) from the compressed air inlet 107 to the gas outlet 104 on the master gear 13. Compressed air or a compressed air-oil mixture is ejected from the gas outlet 104 toward the internal toothing 22 to be measured. Oil-containing compressed air, i.e., compressed air to which lubricant has been added, is also conceivable as compressed air.

[0117] Within the meaning of the present invention, the gas guide channel 101 is understood to be an axial, continuous, internally centered cavity, in particular a bore, preferably located in the metering spindle 5, for the targeted and controlled guidance of compressed air. The gas guide channel 101 can open into the gas outflow channel 102 or directly into the gas outlet channel 103 of the master gear 13.

[0118] In the sense of the present invention, a gas outflow channel 102 is understood to be a radially outwardly directed outflow channel adjoining the gas guide channel 101, in particular for supplying compressed air to the master gear 13. The gas outflow channel 102 is provided in a receiving area 106 for the master gear 13, preferably from the outside, in particular in the form of a bore.

[0119] In the sense of the present invention, a gas outlet channel 103 is understood to be one or more radially outwardly directed holes / recesses in the master gear 13 .

[0120] In the sense of the present invention, a gas outlet opening 104 is understood to be an outlet region on the master gear 13 , through which compressed air is applied to or onto the toothing region to be cleaned of the component to be measured.

[0121] The compressed air cleaning device according to the present invention comprises a gas guiding portion, which includes a gas guiding channel 101 , a gas outflow channel 102 , a gas exhaust channel 103 and / or a gas exhaust port 104 .

[0122] Compressed air or oil-containing compressed air is fed in via the compressed air feed inlet 107. The gas guiding portion, in particular the gas guiding channel 101, the gas outflow channel 102, the gas discharge channel 103 and / or the gas outlet 104, optionally a plurality of the aforementioned components, is in principle fluidly connected so that compressed air or oil-containing compressed air can enter the gas guiding channel 101 via the compressed air feed inlet 107 and be discharged from the gas outlet 104.

[0123] The various embodiments of the compressed air cleaning device will be described below. As part of the pressure cleaning device, one or more gas guide channels 101 and one or more gas outflow channels 102 are preferably arranged in the measuring spindle 5. However, the compressed air supply can also be achieved through the entire spindle unit 4.

[0124] Figure 8 An embodiment of a pressure cleaning device of a device for concentricity measurement according to the present invention is schematically shown.

[0125] In particular, the measuring spindle 5 with the hollow journal 105 with gas guidance and the master gear 13 with gas guidance are shown.

[0126] Accordingly, the compressed air cleaning device shown here is characterized in that the gas-conducting channel 101 is designed as an axially extending channel in the measuring spindle 5. Two radially oriented gas outflow channels 102 are provided in the journal 105. The gas-conducting channel 101 in the measuring spindle 5 is designed without cumulative steps, i.e., the gas-conducting channel 101 has a constant cross section over its length.

[0127] Figure 9 Another embodiment of a pressure cleaning device of the apparatus for concentricity measurement according to the invention is schematically shown.

[0128] In particular, the measuring spindle 5 is shown with a gas guide channel 101 having a tapering diameter, in particular for achieving a nozzle effect. The gas outflow channel 102 is configured at 90° to the longitudinal axis 30 of the spindle unit.

[0129] Accordingly, the compressed air cleaning device shown here is characterized in that the gas guide channel 101 is designed as an axially extending channel in the measuring spindle 5. A radially oriented gas outflow channel 102 is provided in the journal 105. The gas guide channel 101 in the measuring spindle 5 is designed to taper continuously, in particular conically. The gas guide channel 101 tapers in particular in the direction of the journal 105.

[0130] In addition, Figure 9 , which is representative of all relevant figures, also shows a receiving area 106 for a master gear on the journal 105 .

[0131] Figure 10 Another embodiment of the measuring spindle 5 , the master gear 13 , and the pressure cleaning device of the device for concentricity measurement according to the present invention is schematically shown.

[0132] In particular, the measuring spindle 5 is shown with a gas-conducting channel 101 of constant diameter.

[0133] Accordingly, the compressed air cleaning device shown here is characterized in that the gas-conducting channel 101 is designed as an axially extending channel in the measuring spindle 5. A radially oriented gas outflow channel 102 is provided in the journal 105. The gas-conducting channel 101 in the measuring spindle 5 is designed without cumulative steps, i.e., the gas-conducting channel 101 has a constant cross section over its length.

[0134] Figure 11 Another embodiment of a pressure cleaning device of the apparatus for concentricity measurement according to the invention is schematically shown.

[0135] In particular, a metering spindle 5 is shown with cumulative steps in the gas guide channel 101 , in particular for achieving a nozzle effect.

[0136] Accordingly, the compressed air cleaning device shown here is characterized in that the gas guide channel 101 is designed as an axially extending channel in the measuring spindle 5. A radially oriented gas outflow channel 102 is provided in the journal 105.

[0137] The gas-conducting channel 101 is provided with a cumulative step. That is, the gas-conducting channel 101 has sections with different cross-sections. Specifically, the channel comprises a first section 101a with a first cross-section A1, a second section 101b with a second cross-section A2, and a third section 101c with a third cross-section A3. The third section 101c is arranged on the side of the measuring spindle 5 that is closer to the journal 105, while the first section 101a is arranged on the side of the measuring spindle that is farther from the journal 105. The second section 101b is arranged between the first section 101a and the third section 101c. The first cross-section A1 is designed to be larger than the second cross-section A2, and the second cross-section A2 is designed to be larger than the third cross-section A3. This results in the cumulative step mentioned above.

[0138] Figure 12 Another embodiment of a pressure cleaning device of the apparatus for concentricity measurement according to the invention is schematically shown.

[0139] In particular, a measuring spindle 5 is shown with a circumferential groove 108 in the journal.

[0140] Accordingly, the compressed air cleaning device shown here is characterized in that the gas guide channel 101 is designed as an axially extending channel in the measuring spindle 5. A radially oriented gas outflow channel 102 is provided in the journal 105. The gas guide channel 101 in the measuring spindle is designed to taper continuously, in particular, conically. The gas guide channel 101 tapers in particular toward the journal 105. Furthermore, it is provided that the journal 105 is designed with a circumferential groove 108. The radially oriented gas outflow channel 102 opens into the circumferential groove 108.

[0141] Figure 13 Another embodiment of a compressed air cleaning device is shown in a cross-sectional view.

[0142] In particular, a measuring spindle 5 is shown which has a gas outflow channel 102 which is designed obliquely to the longitudinal axis of the spindle unit, for example at an angle of 135° to the longitudinal axis 30 of the spindle unit.

[0143] Accordingly, the compressed air cleaning device shown here is characterized in that the gas-guiding channel 101 is designed as an axially extending channel in the measuring spindle 5. A gas outflow channel 102 is provided in the journal 105 and is oriented obliquely with respect to the longitudinal axis 30 of the spindle unit. The gas outflow channel 102 can, for example, be at an angle of 135° with respect to the longitudinal axis 30 of the spindle unit. The gas-guiding channel 101 in the measuring spindle is not configured with cumulative steps, i.e., the gas-guiding channel 101 has a constant cross-section over its length.

[0144] Figure 14 Another embodiment of a compressed air cleaning device is shown in a cross-sectional view.

[0145] In particular, the metering spindle 5 is shown with an accumulation step and a plurality of gas outflow channels 102 .

[0146] Accordingly, the compressed air cleaning device shown here is characterized in that the gas guide channel 101 is designed as an axially extending channel in the measuring spindle 5. Two radially oriented gas outflow channels 102 are provided in the journal 105.

[0147] The gas-conducting channel 101 is provided with a cumulative step. That is, the gas-conducting channel 101 has sections with different cross-sections. Specifically, the channel comprises a first section 101a with a first cross-section A1, a second section 101b with a second cross-section A2, and a third section 101c with a third cross-section A3. The third section 101c is arranged on the side of the measuring spindle 5 that is closer to the journal 105, while the first section 101a is arranged on the side of the measuring spindle that is farther from the journal 105. The second section 101b is arranged between the first section 101a and the third section 101c. The first cross-section A1 is designed to be larger than the second cross-section A2, and the second cross-section A2 is designed to be larger than the third cross-section A3. This results in the cumulative step mentioned above.

[0148] Figures 15 to 17 Further embodiments of a pressure cleaning device of the apparatus for concentricity measurement according to the invention are schematically shown.

[0149] In particular, the embodiment of a pressure cleaning device is shown, which has one or more gas conducting channels 101 but no gas outflow channel 102 .

[0150] Here, the gas guide channel 101 extending through the measuring spindle 5 is oriented obliquely relative to the longitudinal axis 30 of the spindle unit. The gas guide channel 101 can, for example, be conically shaped or include stepped portions. Of course, the gas guide channel can also have a continuous, constant cross-section. One, two, or more gas guide channels 101 can extend through the measuring spindle. Alternatively, the gas guide channel 101 or multiple gas guide channels 101 can open directly into the journal surface or have outflow openings. In other words, the aforementioned gas outflow channel 102 can also be omitted.

[0151] Next reference Figures 18 to 18c 、 Figures 19 to 19c 、 Figures 20 to 20c as well as Figures 21 to 21c . Figure 18 、 Figure 19 、 Figure 20 and Figure 21 Several embodiments of a master gear 13 of a concentricity measuring device 1 according to the present invention are shown. As part of a pressure cleaning device, a gas outlet channel 103 or a gas outlet opening 104 is provided, in particular, in the master gear 13. The master gear 13 itself has a bore 131. The journal 105 can be inserted into the bore 131 accordingly.

[0152] First reference Figures 18 to 18c This is a standard gear in which the tooth flanks are designed in the form of circular arcs.

[0153] Gas exhaust channels 103 are provided, extending from the holes 131 into the tooth tips. The respective gas exhaust openings 104 are arranged at the ends of the respective gas exhaust channels 103, in this case, in the tooth tips. In this embodiment, the gas exhaust channels 103 are arranged around the rotation axis 32 of the master gear 13 on the horizontal center line (axis of symmetry) 332 of the master gear 13.

[0154] Next reference Figures 19 to 19c This is a standard gear in which the tooth flanks are designed in the form of circular arcs.

[0155] Gas exhaust channels 103 are provided, extending from the bore 131 into the tooth root. The respective gas exhaust openings 104 are arranged at the end of the respective gas exhaust channels 103, in this case, in the tooth root. In this embodiment, the gas exhaust channels 103 are arranged around the rotation axis 32 of the master gear 13 on the horizontal center line (axis of symmetry) 332 of the master gear 13.

[0156] Next reference Figures 20 to 20c This is a master gear 13 in which the tooth flanks are designed in an involute manner.

[0157] Gas exhaust channels 103 are provided, extending from the holes 131 into the tooth tops. The respective gas exhaust openings 104 are arranged at the ends of the respective gas exhaust channels 103, in this case, in the tooth tops. In this embodiment, the gas exhaust channels 103 are arranged around the rotation axis 32 of the master gear 13 on the horizontal center line (axis of symmetry) 332 of the master gear 13.

[0158] Next reference Figures 21 to 21c This is a master gear 13 in which the tooth flanks are designed in an involute manner.

[0159] Gas exhaust channels 103 are provided, extending from the bore 131 into the tooth root. Respective gas exhaust ports 104 are arranged at the end of the respective gas exhaust channels 103, in this case, in the tooth root. In this embodiment, the gas exhaust channels 103 are arranged about the rotation axis of the master gear 13 on the horizontal center line (axis of symmetry) xy of the master gear 13.

[0160] Next reference Figure 22 to Figure 22b .

[0161] In this case, the spindle unit 4 , in particular the cutting spindle 5 , is integral and ultimately forms the output spindle 6 and the cutting spindle 5 .

[0162] The gas guide channel 101 extends from a compressed air inlet 107 along the main shaft 5 to a gas outflow channel 102 / the master gear 13 / the gas outlet channel 103 or the gas outlet 104 .

[0163] The main shaft 5 is held on the bed so as to be rotatable about a rotation point D.

[0164] The adjustment (and optionally the measurement) can be carried out via elements at the other end of the main shaft 5 remote from the master gear 13 , in particular an adjustment element 14 or a measuring unit 15 .

[0165] Figure 22a and Figure 22b Two exemplary embodiments of how the gas-conducting channel 101 can be designed are shown.

[0166] in particular, Figure 22a The main shaft 5 is shown to be recessed relative to the outer surface with a groove 111 or similar structure. A tubular body 110 that is engaged around the main shaft 5 and covers the groove 111 forms the groove 111 , ie, the gas guide channel 101 .

[0167] in particular, Figure 22b The main shaft 5 and the tubular body 110 are shown. The diameter of the tubular body 110 is larger than that of the main shaft 5 and the tubular body is installed at a distance from the main shaft 5 so that a gap is formed between the tubular body 110 and the main shaft 5, which gap constitutes the gas guide channel 101.

[0168] Next reference Figure 23 . Figure 23 A perspective view shows another embodiment of a master gear 13 for the concentricity measurement device according to the present invention. This variant features a partial gas outlet 104. The master gear 13 lacks a circumferential groove 109 in the bore 131, and the gas outlet openings on the journal 105 or the spindle unit 4, in particular the measuring spindle 5, only apply an air-oil mixture to the gas outlet duct 103 of the master gear 13 in specific angular segments. Consequently, only those gas outlet ducts 104 of the master gear 13 in which the teeth or tooth gaps are about to engage, are engaging, or have already engaged are used. This depends on the design of the gas outlet duct 103 of the spindle 4 and the master gear 13, as well as the position of the respective air transition cross sections relative to one another.

[0169] In particular, the following scenarios are conceivable:

[0170] a) the spindle unit 4, in particular the measuring spindle 5 or the journal 105, has one or more gas outlet channels 102, but no circumferential groove extending through the opening, so that the air cannot be conveyed radially around the spindle, but can only be conveyed into the "superimposed" gas outlet channels 103 in the master gear;

[0171] b) Depending on the position of the gas outlet opening 104 a on the measuring spindle 5 relative to the gas outlet channels 103 (air inlets) of the master gear 13 , not all air inlet channels 103 on the master gear 13 are supplied with oil-air mixture.

[0172] Alternatively, it is conceivable that the gas outlet channels 103 extend alternately from the holes 131 toward the tooth tip and the tooth root. Other pairing arrangements are also conceivable. The gas outlet ports 104 are each arranged at the end of the gas outlet channel 103. Thus, the gas flow is directed alternately through the gas outlet ports 104 at the tooth tip and then through the gas outlet ports 104 at the next tooth root.

[0173] Next reference Figure 24 .

[0174] Figure 24 A cross-sectional view shows one embodiment of an apparatus for concentricity measurement, including a pressure cleaning device according to the present invention. In particular, the gas guide duct 101 extending through the spindle unit 4, in particular the measuring spindle 5 and the output spindle 6, can be seen. Compressed air or oil-containing compressed air is fed via a compressed air inlet 107 and introduced through the gas guide duct 101 into the gas outlet duct 103 of the master gear 13.

[0175] The device for concentricity measurement or the compressed air cleaning device can be distinguished by the following further features.

[0176] Preferably, an advantageous structural optimization of the gas guide, in particular an advantageous structural optimization of the compressed air application to the internal toothing of the component, in particular the shaft, is provided.

[0177] In particular, some gas outlet openings can be provided on a journal or bearing journal or on a measuring spindle in the region of receiving or arranging the master gear 13. Thus, compressed air is only applied to those outlet openings or nozzles of the master gear just before and / or during the meshing of the master gear with the internal toothing 22 of the component 20, in particular a shaft.

[0178] In particular, it can be provided that the gas guide is designed such that the toothing of the shaft is acted upon or supplied with oil-containing compressed air before the actual measurement.

[0179] In particular, it can be provided that the gas duct is designed such that the friction surfaces between the bores 131 of the master gear 13 and / or the flat surface of the master gear 13 can also be acted upon or supplied with oil-containing compressed air.

[0180] In particular, it can be provided that the master gear 13 is provided with a gas guide.

[0181] In particular, it can be provided that the measuring spindle 5 is equipped with a hollow journal 105 with a gas guide.

[0182] In particular, it can be provided that the master gear 13 rotates on the measuring spindle 5 , in particular on the journal 105 .

[0183] In particular, it can be provided that the master gear 13 is arranged axially fixed but rotatably on the journal 105 of the measuring spindle 5 .

[0184] In particular, it can be provided that the master gear 13 rotates together with the measuring spindle 5 .

[0185] In particular, it can be provided that the master gear 13 is arranged axially fixed and non-rotatably on the measuring spindle 5 , in particular on the journal 105 .

[0186] In particular, it can be provided that the gas guide of the measuring spindle 5 is designed as an inner central gas guide channel 101 which has a gas outlet opening 104 a in the direction of the side receiving the master gear 13 .

[0187] The gas guiding channel 101 can have various geometrical configurations that generate or intensify the nozzle effect in the direction of the side of the gas guiding channel 101 that receives the master gear 13 .

[0188] A particularly advantageous configuration is that the gas guiding channel 101 is configured with a constant diameter, or that the gas guiding channel 101 is configured with one or more diameter jumps, in particular cumulative steps, or with a stepped diameter or a tapering diameter, in particular for generating a nozzle effect or an acceleration effect in the direction of the side that receives the master gear 13).

[0189] It can also be preferably provided that the gas guiding channel 101 has a continuously tapering diameter, in particular a conical diameter, in the direction of the side receiving the master gear 13 , in particular to achieve a nozzle effect or an acceleration effect.

[0190] As an alternative to internal centering, one or more gas-conducting channels 101 can also be arranged axially obliquely in the measuring spindle 5. This allows the aforementioned gas outlet to be omitted from the radially outward-facing outflow channel 102 of the gas-conducting channel. For example, the gas-conducting channel 101 can be directed radially outward at a 45° angle relative to the spindle unit longitudinal axis 30 of the measuring spindle 5. The gas-conducting channel or channels 101 can be configured with a constant diameter, one or more diameter changes, or a continuously tapering, in particular conical, diameter. The gas-conducting channel or channels 101 are preferably arranged in the measuring spindle 5 such that imbalances are not generated or their occurrence is suppressed.

[0191] The gas outflow channel 102 of the measuring spindle 5 is preferably designed as at least one radially outwardly directed gas outflow channel 102, which adjoins or merges into the gas guide channel 101 in the receiving region of the master gear, in particular at a journal of the measuring spindle 5. The gas guide channel 101 preferably merges into the gas outflow channel 102. The compressed air or oil-laden compressed air guided through the gas guide channel 101 is preferably guided via the gas outflow channel 102 to a gas outlet channel 103 or a gas outlet opening 104.

[0192] A particularly advantageous embodiment is, for example, that the gas outflow channel 102 is directed radially outward at an angle of 45° to 135°, preferably 90°, relative to the spindle unit longitudinal axis 30 of the measuring spindle 5 .

[0193] The gas outflow channel 102 preferably has a constant diameter.

[0194] The diameter of the gas outflow channel 102 is preferably smaller than the minimum diameter of the gas guide channel 101. This can intensify the nozzle effect.

[0195] The gas outflow channel 102 may have a continuous diameter expansion in the flow direction.

[0196] The gas outflow channel 102 may open into a partial groove or a surrounding groove.

[0197] It is also conceivable to arrange a plurality of gas outflow channels 102 radially circumferentially at the end of the gas guiding channel 101 .

[0198] The gas guide of the master gear is preferably designed as at least one gas outlet channel 103 , preferably a plurality of gas outlet channels 103 , which are preferably arranged on or in the master gear 13 , thereby ensuring the most optimal possible application of (oil-containing) compressed air to the internal toothing of the component to be measured.

[0199] A particularly advantageous configuration of the gas outlet channel 103 is, for example, to extend the gas outlet channel 103 in the direction of the tip circle, root circle and / or tooth flank of the toothing of the master gear 13, in particular one gas outlet channel for each toothing, tooth root and / or tooth flank.

[0200] The preferred geometric configuration of the gas outlet channel 103 is cylindrical. However, other geometric configurations are also conceivable, in particular configurations that further enhance the nozzle effect.

[0201] For each individual tip circle and / or root circle and / or tooth flank of the toothing of the master gear 13 , the configuration of one or more gas outlet channels 103 is conceivable.

[0202] The arrangement of the gas outlet channels 103 in the tip circle and / or the root circle and / or the tooth flanks of the master gear 13 can be combined in various ways.

[0203] In a further advantageous embodiment, the master gear 13 can have a partially circumferential or circumferential groove 109 in the region of engagement with the journal 105 in order to improve the compressed air distribution at the individual gas outlet channels 103 .

[0204] The plurality (at least one) of gas outlet openings 104 on the master gear 13 can be designed in different geometries. In particular, circular gas outlet openings, elliptical gas outlet openings, in particular converging gas outlet openings or rectangular gas outlet openings can be provided, for example by erosion.

[0205] In an advantageous embodiment of the invention, it can be provided that a plurality of air outlet channels 103 can lead from the air transition of the measuring spindle 5 into the master gear 13 .

[0206] Preferably, a nozzle effect can be generated at the gas outlet opening 104 of the master gear 13 , in particular by a small gap between the master gear 13 and the toothing to be measured.

[0207] If the measuring spindle 5 itself is rotatably mounted, the master gear 13 is preferably press-fitted onto the measuring spindle 5. Otherwise, i.e., if the measuring spindle 5 is not rotatable, the master gear 13 is rotatably mounted on the measuring spindle 5, in particular on the journal 105. However, it is also conceivable that the master gear 13 is connected to the measuring spindle 5 in another non-positive, positive, or even material-locked manner.

[0208] In another advantageous embodiment, it can be provided that the tooth shape of the master gear 13 is designed as a circular arc.

[0209] In another advantageous embodiment, it can be provided that the tooth shape of the master gear 13 is designed as an involute.

[0210] In another advantageous embodiment, it can be provided that the tooth shape of the master gear 13 is designed as a cylindrical cut arc, a continuous cylindrical radius / arc, a continuous cylindrical involute, a crowned radius / arc or a crowned involute.

[0211] In another advantageous embodiment, it can be provided that the tooth shape of the master gear 13 is designed as a cylindrically cut involute.

[0212] Obviously, the device, in particular its compressed air cleaning device, in particular its gas guide, gas guide channel 101 , gas outflow channel 102 , gas outlet channel 103 and / or gas outlet 104 can have many configurations that are not shown here in detail.

[0213] In particular, it can be provided that one or more gas guide channels 101 are provided inside the measuring spindle 5, and / or the one or more gas guide channels 101 are oriented straight or inclined relative to the longitudinal axis 30 of the spindle unit, and / or the one or more gas guide channels 101 are constructed to have a constant cross-section over their length, to be conical or to have a stepped portion.

[0214] In particular, it can be provided that one or more gas outflow channels 102 are provided in the measuring spindle 5 , in particular in the journal 105 of the measuring spindle 5 , and / or that the one or more gas outflow channels 102 are oriented radially or obliquely relative to the spindle unit longitudinal axis 30 .

[0215] In particular, it can be provided that a circumferential or at least partially circumferential groove 108 is provided in the journal 105 , into which groove 108 the gas outflow channel or channels 102 open.

[0216] In particular, it can be provided that gas outlet channels 103 are arranged in the master gear 13 , which extend from the opening in the direction of the tooth tips, tooth flanks and / or tooth roots.

[0217] In particular, it can be provided that the gas outlet opening is arranged at the end face of the gas outlet channel in the tooth crest, tooth flank and / or tooth root.

[0218] In a preferred embodiment of the device, the compressed air cleaning device, in particular the gas guide, in particular the master gear 13, is designed so that compressed air is applied only to the tooth gaps of the master gear 13 that are about to come into contact with and / or are also in contact with the internal toothing 22 to be measured. This can be achieved structurally, for example, by aligning the gas outflow channel 102 in such a way that the tooth gaps of the master gear 13 come into contact with the internal toothing 22 to be measured.

[0219] Next should explain in more detail the method according to the present invention.Should be understood that only some selected method steps that help to understand the method according to the present invention are shown here.The method may include other steps or intermediate steps known to those skilled in the art.

[0220] It is provided that the method according to the invention for measuring the concentricity of an internal toothing 22 of a component 20 , in particular a shaft, using the device according to the invention comprises the method step of cleaning, in particular blowing out, the internal toothing 22 by means of a compressed air cleaning device.

[0221] The gas guide, in particular in the form of a hole, is preferably introduced into the root circle of the master gear 13, and the gas outflow opening 102 of the measuring spindle 5, in particular of the journal 105 for the master gear 13, is preferably designed such that compressed air is applied only to the tooth gaps of the master gear 13 that are about to contact and / or are also contacting the internal toothing 22 to be measured.

[0222] In this position, the greatest possible nozzle effect should be generated between the tooth gap of the master gear 13 and the corresponding toothing of the measured object, which increases the air flow rate and thus also enables advantageous cleaning of the internal toothing 22. The air pressure should preferably be selected such that no radial deflection of the measuring structure occurs and thus no measuring errors occur.

[0223] Another preferred feature of the method according to the invention is that during the measurement, in particular immediately after the tooth machining process, the component, in particular the shaft, is additionally or simultaneously cleaned by means of compressed air or oil-containing compressed air, in particular indirectly via the master gear 13. In the case of oil-containing compressed air, in particular lubrication of the master gear 13 is achieved. The compressed air or oil-containing compressed air is guided, in particular, via the metering spindle 5 through the master gear 13 into the internal toothing 22.

Claims

1. A device (1) for measuring the concentricity of a component (20), in particular an internal toothing (22) of a shaft, the device (1) comprising at least one determination section (2) for determining a concentricity deviation, the determination section comprising: - a spindle unit (4), comprising a measuring spindle (5) and an output spindle (6), the measuring spindle having a master gear (13) arranged on a first end of the measuring spindle (5) for measuring the concentricity of the internal toothing (22) of the component (2), the output spindle (6) for transmitting the measured concentricity from the measuring spindle (5) to the measuring unit (15), the output spindle (6) being arranged directly or indirectly on a second end of the measuring spindle (5), the second end of the measuring spindle being opposite the first end of the measuring spindle (5); and - a spindle support (7), at least for holding and positioning the measuring spindle (5) or the output spindle (6), advantageously for holding and positioning the spindle unit (4); - an adjusting element (14) for positioning at least a master gear (13) connected to the measuring spindle (5); and - the measuring unit (15) is used to compare the measured concentricity with a reference value; Characterized in that the device is equipped with a compressed air cleaning device.

2. The device according to claim 1, characterized in that The measuring spindle (5) is configured with a journal (105) for rotatably or fixedly receiving the master gear (13), and / or the measuring spindle (5) is configured for rotatably or fixedly receiving the master gear (13).

3. The device according to at least one of the preceding claims, characterized in that The compressed air cleaning device comprises a gas guide in the device, in particular in the measuring spindle (5), the output spindle (6) and / or the master gear (13).

4. The device according to at least one of the preceding claims, characterized in that The compressed air cleaning device, in particular its gas guide portion, comprises at least a gas guide channel (101) arranged in the measuring spindle (5), a gas outflow channel (102) arranged in the measuring spindle (5), a gas exhaust channel (103) arranged in the standard gear (13) and / or a gas exhaust port (104) arranged in the standard gear (13).

5. The device according to at least one of the preceding claims, characterized in that: - The measuring spindle (5) has a spindle unit longitudinal axis (30), wherein: - one or more gas guide channels (101) are provided inside the measuring spindle (5), and / or - the one or more gas guide channels (101) are positioned straight or obliquely relative to the spindle unit longitudinal axis (30), and / or The one or more gas-conducting channels (101) are designed with a constant cross section over their length, are designed conically or are designed with steps.

6. The device according to at least one of the preceding claims, characterized in that: - one or more gas outflow channels (102) are provided in the measuring spindle (5), in particular in the journal (105) of the measuring spindle (5), and / or The one or more gas outflow channels (102) are oriented radially or obliquely relative to the longitudinal axis (30) of the spindle unit.

7. The device according to at least one of the preceding claims, characterized in that A circumferential or at least partially circumferential groove (108) is provided in the journal (105), into which groove (108) the one or more gas outflow channels (102) open.

8. The device according to at least one of the preceding claims, characterized in that The standard gear (13) comprises a hole 131 for receiving a measuring spindle (5), wherein a gas exhaust channel (103) is arranged in the standard gear (13), and the gas exhaust channel (103) extends from the hole (131) in the direction of the tooth top, tooth flank and / or tooth root of the standard gear (13).

9. The device according to at least one of the preceding claims, characterized in that The gas outlet (104) is arranged on the end side of the gas outlet channel (103) in the tooth top, tooth flank and / or tooth root of the master gear (13).

10. The device according to at least one of the preceding claims, characterized in that The compressed air cleaning device, in particular the gas guide, in particular the master gear (13), is designed so that compressed air is applied only to the tooth gaps of the master gear (13) which are about to come into contact with and / or are in contact with the internal toothing (22) to be measured.

11. The device according to at least one of the preceding claims, characterized in that The gas outlet (104) on the master gear (13) is configured as a circular gas outlet, an elliptical gas outlet, in particular a constricted gas outlet or a rectangular gas outlet.

12. The device according to at least one of the preceding claims, characterized in that The master gear (13) comprises a circumferential or at least partially circumferential groove (109) in the region of engagement with the journal (105).

13. Method for cleaning a component, in particular its internal toothing, by means of the device according to at least one of the preceding claims, characterized in that The internal toothing (22) of the component is cleaned, in particular blown away, by means of the compressed air cleaning device.

14. The method according to claim 13, characterized in that During the measurement process, in particular directly after the tooth machining process, the component, in particular the internal toothing (22) of the shaft, is cleaned.

15. The method according to at least one of the preceding claims, characterized in that Cleaning is performed by means of compressed air or oil-containing compressed air, in particular the internal toothing (22) is blown out by means of compressed air or oil-containing compressed air.

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