Device for measuring the true running of an inner tooth set of a component, in particular a shaft, and method for cleaning a component, in particular an inner tooth set of the component

Abstract

The invention relates to a device (1) for measuring the true running of an inner tooth set (22) of a component (20), in particular a shaft, wherein the device (1) comprises at least one determination segment (2) for determining a true running deviation, comprising a spindle unit (4) with a tapping spindle (5) having a gauge gear wheel (13), arranged at a first end of the tapping spindle (5), for tapping off the true running of the inner tooth set (22) of the component (2), and an output spindle (6) for transmitting the true running that is tapped off from the tapping spindle (5) to a measuring unit (15), wherein the output spindle (6) is arranged indirectly or directly on a second end of the tapping spindle (5) which is opposite the first end of the tapping spindle (5), and a spindle holder (7) at least for holding and positioning the tapping spindle (5) or the output spindle (6), advantageously the spindle unit (4), an adjusting unit (14) at least for positioning at least the gauge gear wheel (13) connected to the tapping spindle (5), and the measuring unit (15) for comparing the tapped-off true running with reference values, wherein the tapping spindle (5) has a spindle unit longitudinal axis (30), wherein the gauge gear wheel (13) comprises a bore for being received on the tapping spindle (5), wherein the device is equipped with a compressed air cleaning apparatus. The invention also relates to a method for cleaning a component with a device according to the invention.

Description

[0001] Device for measuring the concentricity of an internal toothing of a component, in particular a shaft, and method for cleaning a component, in particular an internal toothing of the component

[0002] The present invention relates to a device for measuring the concentricity of an internal toothing of a component, in particular a shaft, according to the preamble of claim 1, and to a method for cleaning a component, in particular an internal toothing of the component, using a device according to the invention according to the preamble of claim 13.

[0003] A device of the aforementioned type is known, for example, from DE 10 2017 215 285 A1.

[0004] The aforementioned device for concentricity measurement essentially consists of a high-precision pick-up spindle with a gauge gear, which are mounted on a rocker. The joint of the rocker is formed by a spring joint, which is very rigid and allows movement almost exclusively in the desired plane. Mounting the rocker via a precisely mounted rotary axis is also conceivable. The measuring force for the measurement is applied by the spring joint, a spring, or a pneumatic cylinder. At the other end of the rocker is a pneumatic cylinder and a measuring sensor. The pneumatic cylinder is intended to enable the axial insertion of the gauge gear. The cylinder is controlled, and the rocker is deflected. The force of the pneumatic cylinder is slightly greater than the force of the spring joint, and thus the pick-up spindle with the gauge gear is lifted. The entire unit is then inserted into the bore with the internal gearing.The cylinder is now vented, and due to the force of the spring joint, the gauge gear engages the gear teeth. After a complete rotation of the component, it is now possible to determine the concentricity error using the measured values ​​from the encoder. The metrological references for the concentricity measurement must be created mechanically using roller prisms or electronically using encoders.

[0005] When taking measurements using the aforementioned measuring device, so-called "pseudo-rejects" can repeatedly occur due to contamination. This contamination largely originates from the (upstream) gear cutting process and is not completely removed by a downstream cleaning process. This usually consists of fine material abrasion that deposits on the tooth flanks and negatively influences the measurement result for the gear runout. In the previous procedure, after the gear cutting process, in particular gear cutting by chipless forming, in which a profile punch is pressed through the workpiece / shaft, a cooling lubricant emulsion and air are sprayed into the gear under pressure using a lance for cleaning and the runout measurement is then carried out as a separate process. This procedure still leaves a residual uncertainty with regard to any material and / or dirt residues.Very fine metal debris cannot be completely removed using conventional methods. Problems arise due to "pseudo-rejects" during the subsequent concentricity measurement.

[0006] Through our own investigations of components, such as rotor shafts, which were declared scrap after grinding and 100% measurement, we discovered that residual dirt particles were present in the gear teeth. These residual dirt particles negatively impacted or distorted the measurement results. After cleaning the internal gear teeth with compressed air, the radial runout of the gear teeth was within the permissible tolerance for many of the components previously declared as scrap, such as rotor shafts.

[0007] This is where the present invention comes in and sets itself the task of proposing an improved device for concentricity measurement, in particular providing a device for concentricity measurement which is suitable for reducing “pseudo-rejects”.

[0008] According to the invention, this object is achieved by a device for measuring concentricity with the characterizing features of claim 1. By equipping the device for measuring concentricity with a compressed air cleaning device, the problems outlined above can be solved or at least mitigated. In particular, "pseudo-rejection" can be reduced. The compressed air cleaning device is preferably an integral component of the device.

[0009] This should significantly reduce pseudo-rejects in grinding operations and eliminate manual reworking of the shafts with compressed air, making the production process more efficient and reducing scrap costs and thus unit costs.

[0010] In particular, through bores drilled in the tip and / or root circle of the master gear, the tooth flanks of the internal gearing to be measured of a component, in particular a shaft, can be cleaned indirectly using compressed air, in particular by redirecting or deflecting the air flow and / or nozzle flow, via the master gear. The compressed air is preferably supplied via a spindle unit that is at least partially hollow and on which the master gear is arranged. The spindle unit can, for example, comprise a pick-up spindle and a delivery spindle. The compressed air can be supplied via the spindle unit, in particular from the outside directly into the pick-up spindle or from the outside into the delivery spindle and then through the pick-up spindle. In particular, the compressed air can be introduced axially or radially into the spindle unit.

[0011] For this purpose, an air duct and an air outlet duct are incorporated into the spindle unit, particularly in the pick-off spindle. This enables air to be supplied through the pick-off spindle into the gauge gear, allowing compressed air to be applied to several or only individual tooth segments. The air duct is preferably designed as a central through-hole in the pick-off spindle.

[0012] The air outlet and the air guide channel are preferably designed in such a way that the use of oiled compressed air is possible, which also allows lubrication of the gauge gear at the same time.

[0013] With a favorable design of the air duct, especially with regard to the air outlet and / or air duct, an improvement in the repeatability of the runout measurement can also be expected, as an air bearing is formed between the pick-up spindle and the gauge gear. Ideally, lubricated compressed air should be used to enable lubrication of the gauge gear on the shaft journal.

[0014] Further advantageous embodiments of the proposed invention emerge in particular from the features of the subclaims. The subject matter and features of the various claims can, in principle, be combined with one another in any desired way.

[0015] In an advantageous embodiment of the invention, the pick-up spindle can be equipped with a pin for rotatably or fixedly receiving the gauge gear and / or the pick-up spindle can be configured for rotatably or fixedly receiving the gauge gear. If the gauge gear is rotatably mounted, the pin forms a bearing seat for the gauge gear. Preferably, a plain bearing is formed between the bore of the gauge gear and the pin. If the pick-up spindle and gauge gear are fixed, a fixed connection is formed between the pin and the gauge gear. The gauge gear can also be mounted directly on the pick-up spindle, either rotatably or fixedly.

[0016] In a further advantageous embodiment of the invention, it can be provided that the compressed air cleaning device comprises an air duct in the device, in particular in the pick-up spindle, the delivery spindle, and / or the gauge gear. The air duct basically serves to transport the compressed air or lubricated compressed air to the location to be cleaned. The air duct thus forms an integral component of the device, in particular of the pick-up spindle or the pick-up spindle and delivery spindle. The air duct extends, in particular, "through" the spindle into the gauge gear, i.e., in particular, through the pick-up spindle, pick-up spindle, and / or gauge gear.

[0017] In a further advantageous embodiment of the invention, the compressed air cleaning device, in particular its air guide, can comprise at least one air guide channel arranged in the pick-up spindle, an air outlet channel arranged in the pick-up spindle, an air outlet channel arranged in the gauge gear, and / or an air outlet arranged in the gauge gear. The air guide can comprise various components that are integrated into individual components of the device, such as the pick-up spindle and / or the gauge gear.

[0018] In a further advantageous embodiment of the invention, one or more air ducts can be provided within the pick-off spindle, and / or the air duct(s) can be aligned straight or obliquely with respect to the spindle unit's longitudinal axis, and / or the air duct(s) can be provided with a constant cross-section over their length, be conical, or have steps. The design of the air duct(s) can influence the flow behavior of the medium flowing through them. In this case, nozzle effects, for example, can be achieved. The compressed air can also be distributed across multiple air ducts.

[0019] In a further advantageous embodiment of the invention, it can be provided that one or more air outlet channels are provided in the pick-up spindle, in particular in the pin of the pick-up spindle, and / or the air outlet channel or the air outlet channels are aligned radially or obliquely with respect to the spindle unit longitudinal axis.

[0020] This allows for optimized flow conditions at the transfer position to the gauge gear. A channel can also be provided for the root circuit supply or a channel for the tip circuit supply. Furthermore, a selective supply of compressed air can be provided, especially if more than one air duct has been incorporated into the spindle unit. This allows different pressures to be applied to the root and / or tip circuit supply.

[0021] In a further advantageous embodiment of the invention, a circumferential or at least partially circumferential groove can be provided in the pin, with the air outlet channel(s) opening into the groove. The groove can serve to improve compressed air distribution to the respective air outlet channels of the gauge gear.

[0022] In a further advantageous embodiment of the invention, air outlet channels can be arranged in the gauge gear, with the air outlet channels extending from the bore toward the tooth tips, tooth flanks, and / or tooth roots of the gauge gear. The air outlet channels transport the compressed air toward the preferred locations of the gauge gear's toothing, depending on which components of the gauge gear's toothing the air outlet is to be provided.

[0023] In a further advantageous embodiment of the invention, the air outlets can be arranged at the ends of the air outlet channels in the tooth tips, flanks, and / or roots of the gauge gear. This allows the compressed air to be directed to those areas of the component's internal gearing that exhibit a high degree of contamination due to the previous machining process or where the contamination would significantly influence the actual measurement. This can vary considerably depending on the type of previous machining.

[0024] In a further advantageous embodiment of the invention, the compressed air cleaning device, in particular the air guide, in particular the gauge gear, can be designed such that only those tooth gaps of the gauge gear that are just before contact and / or in contact with the internal gear to be measured are subjected to compressed air. This measure results in particularly good cleaning results. Structurally, this measure can essentially be achieved by appropriately aligning the air outlet duct with regard to the expected position of contact or just before contact with the internal gear to be measured.

[0025] In a further advantageous embodiment of the invention, the air outlets on the gauge gear can be designed as circular air outlets, elliptical air outlets, in particular tapered air outlets, or rectangular air outlets. These measures can also influence the airflow behavior in the area to be cleaned.

[0026] In a further advantageous embodiment of the invention, the gauge gear may include a circumferential or at least partially circumferential groove in the joining area to the pin. This allows for better compressed air distribution.

[0027] A further object of the present invention is to propose an advantageous method for cleaning an internal gearing with a device according to the invention for measuring concentricity.

[0028] According to the invention, the proposed method comprises the step of cleaning, in particular blowing out, the internal gearing using the compressed air cleaning device. It is clear that cleaning can occur almost simultaneously with the measurement. Thus, at least the step of cleaning outside the actual measuring device can be omitted. However, the actual cleaning, which precedes the measurement, should still be retained. However, the integrated compressed air cleaning device can remove any remaining particles, thereby minimizing pseudo-rejects. It is clear that this results in time and cost savings, as well as the avoidance of measurement errors.

[0029] Further advantageous embodiments of the proposed invention emerge in particular from the features of the subclaims. The subject matter and features of the various claims can, in principle, be combined with one another in any desired way.

[0030] In an advantageous embodiment of the invention, it can be provided that the cleaning of the component, in particular the internal gearing of the shaft, takes place during the measurement, especially directly after the gear cutting process. As already outlined above, this results in time and cost savings. Errors can also be avoided, since the component to be measured remains on the fixture after cleaning and can be measured immediately.

[0031] In a further advantageous embodiment of the invention, cleaning can be carried out using compressed air or lubricated compressed air, in particular, the internal gearing can be blown out using compressed air or lubricated compressed air. Contamination can be cleaned or blown away using compressed air. Lubricated compressed air can also be used to wet surfaces with lubricant and lubricate them accordingly.

[0032] Further features and advantages of the present invention will become clear from the following description of preferred embodiments with reference to the accompanying drawings.

[0033] Fig. 1 shows a side sectional view of an embodiment of an exemplary device for measuring concentricity according to the prior art with a gauge gear in the rest position;

[0034] Fig. 2 shows a perspective view of the embodiment of a device shown in Fig. 1;

[0035] Fig. 3 is a side sectional view of the embodiment of a device for measuring concentricity shown in Figures 1 and 2 with a gauge gear in the retracted position;

[0036] Fig. 4 shows a perspective view of the embodiment of a device shown in Fig. 3;

[0037] Fig. 5 is a side sectional view of the embodiment of a device for measuring concentricity shown in Figures 1 to 4 with a gauge gear in the engaged position;

[0038] Fig. 6 shows a side sectional view of the embodiment of a device for measuring concentricity shown in Figures 1 to 5 with a gauge gear in the retracted position; Fig. 7 shows a side sectional view of the embodiment of a device for measuring concentricity shown in Figures 1 to 6 with a gauge gear in the engaged position;

[0039] Fig. 8 shows an embodiment of a pick-off spindle, a gauge gear and a pressure cleaning device of a device according to the invention for measuring concentricity;

[0040] Fig. 9-17 further embodiments of a pick-off spindle, a gauge gear and a pressure cleaning device of a device according to the invention for concentricity measurement;

[0041] Fig. 18 (ac) shows an embodiment of a gauge gear for a device according to the invention for measuring concentricity in different views;

[0042] Fig. 19 (ac) shows a further embodiment of a gauge gear for a device according to the invention for measuring concentricity in different views;

[0043] Fig. 20 (ac) shows a further embodiment of a gauge gear for a device according to the invention for measuring concentricity in different views;

[0044] Fig. 21 (ac) shows a further embodiment of a gauge gear for a device according to the invention for measuring concentricity in different views;

[0045] Fig. 22 shows an embodiment of a device for measuring concentricity in a side sectional view;

[0046] Fig. 22a is a section through an embodiment of a pick-off spindle of a device for concentricity measurement;

[0047] Fig. 22b is a section through another embodiment of a pick-off spindle of a device for concentricity measurement;

[0048] Fig. 23 shows another embodiment of a gauge gear for a concentricity measurement device according to the invention; Fig. 24 shows an embodiment of a concentricity measurement device in a side sectional view. The following reference numerals are used in the figures:

[0049] 1 device

[0050] 2 Investigation segment

[0051] 3 Component receiving segment

[0052] 4 spindle unit

[0053] 5 Pick-off spindle

[0054] 6 Dispensing spindle

[0055] 6.1 Storage section

[0056] 7 Spindle holder

[0057] 8 spindle holder support

[0058] 9 Spindle mounting foot

[0059] 10 sheet metal cuts

[0060] 10.1 first sheet metal cut

[0061] 10.2 second sheet metal cut

[0062] 11 Support rod

[0063] 11.1 first support bar

[0064] 11.2 second support bar

[0065] 12 sleds

[0066] 13 Gauge gear

[0067] 14 Adjustment element

[0068] 15 measuring unit

[0069] 16 Holding table

[0070] 17 Bearing element

[0071] 18 Pivot point

[0072] 19 axis of rotation

[0073] 20 components

[0074] 21 Recess

[0075] 22 internal gearing

[0076] 30 Spindle unit longitudinal axis

[0077] 31 Component longitudinal axis 32 Rotation axis of gauge gear

[0078] 332 horizontal centerline (axis of symmetry) gauge gear

[0079] 101 Air duct

[0080] 102 Air outlet duct

[0081] 103 Air outlet duct

[0082] 104 Air outlet

[0083] 104a Air outlet (on the spindle)

[0084] 105 cones

[0085] 106 Mounting area for the gauge gear

[0086] 107 Compressed air supply or supply for lubricated compressed air

[0087] 108 circumferential groove pick-off spindle

[0088] 109 circumferential groove gauge gear

[0089] 111 groove

[0090] 131 Bore (of the gauge gear)

[0091] 101a first section

[0092] 101b second section

[0093] 101c third section

[0094] Al first cross section

[0095] A2 second cross section

[0096] A3 third cross section

[0097] Features and details described in connection with a method naturally also apply in connection with the device according to the invention, and vice versa, so that with regard to the disclosure of the individual aspects of the invention, reference is always made to each other. Furthermore, a method according to the invention that may be described can be carried out with the device according to the invention.

[0098] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a" and "an" and "the" are intended to include the plural forms unless the context clearly indicates otherwise. It will also be understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of the recited features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed elements.

[0099] Figures 1 to 7 show an exemplary embodiment of a device 1 for measuring the concentricity of an internal gear 22 of a component 20, such as a shaft shown here. The device 1 for measuring the concentricity of an internal gear 22 of a component 20, shown and described in Figs. 1 to 7, is a device according to the prior art, in particular according to DE 10 2017 215 285 A1.

[0100] The device 1 comprises a detection segment 2 and a component receiving segment 3. The detection segment 2 has a spindle unit 4, which comprises a pick-up spindle 5 and a delivery spindle 6. The pick-up spindle 5 is arranged or received in the spindle holder 7, in particular in the spindle holder support 8, so as to be rotatable about the spindle unit longitudinal axis 30. For this purpose, it is conceivable that the spindle holder support 8 comprises a bearing element, such as a plain bearing, a rolling bearing or a steady rest (not shown here). However, it is also possible for the pick-up spindle 5 to be at least partially, as shown in Figures 1, 3, 5, 6 and

[0101] 7, is rotatably mounted in the dispensing spindle 6. Accordingly, the dispensing spindle 6 forms a bearing section 6.1 for supporting the rotatable dispensing spindle 5. The spindle support 8 is advantageously designed in the geometric shape of a cuboid, but can also have a cylindrical shape. Relevant for the spindle support

[0102] 8 is at least the configuration of either a through-bore or one or more recesses or depressions, by means of which an arrangement of the spindles, in particular the pick-up spindle 5 and the delivery spindle 6, is enabled. The bearing element for supporting the rotatable pick-up spindle 5 is advantageously arranged in a section of such a bore, in particular the through-bore or through-recess, or in one of the recesses. The delivery spindle 6 is advantageously connected to the spindle support 8 in a torsionally rigid manner. The delivery spindle 6 is advantageously clamped or pressed into the spindle support 8, in particular into a recess provided for this purpose, or is connected to the spindle support 8 in another non-positive, positive, or materially bonded manner. A gauge gear 13 is arranged at a distal end or an axial end of the pick-up spindle 5.The gauge gear 13 can also be referred to as a reference gear. This axial end is opposite the axial end of the pick-off spindle 5, by which it is connected to the spindle holder support 8. Advantageously, the gauge gear 13 is pressed onto the pick-off spindle 5. However, it is also conceivable for the gauge gear 13 to be connected to the pick-off spindle 5 in another form-fitting, force-fitting, or even material-fitting manner. With a pressed-on gauge gear, however, no air bearing is then formed between the bearing journal and the gauge gear. The spindle holder support 8 is connected to the spindle holder base 9 of the spindle holder 7. The spindle holder base 9 has, for example, intersecting sheet metal cuts 10, in particular two intersecting sheet metal cuts.

[0103] 10.1 and 10.2 or intersecting support rods 11 arranged in two planes, in particular two intersecting support rods 11.1 and 11.2. The spindle mounting base 9 can also be designed as sheet metal sections or support rods arranged in a parallelogram. When using two intersecting sheet metal sections 10, one of the sheet metal sections 10, for example the first sheet metal section 10.1, extends through an opening (not shown here) of the other, in particular the second sheet metal section 10.2. Advantageously, at least one of the sheet metal sections 10, particularly advantageously the first sheet metal section 10.1 and advantageously also both sheet metal sections 10, are elastically springy sheet metal sections 10, which are made, for example, from spring steel. The sheet metal sections 10 each extend in a plane that fans out on the one hand orthogonally to the spindle unit longitudinal axis 30 and on the other hand in the vertical direction.The sheet metal cuts 10 themselves run vertically at a defined angle in this plane.

[0104] When designing support rods 11 as a spindle support base 9, instead of a sheet metal cut construction 10, as schematically indicated by way of example in Fig. 1, two support rods 11.1 and 11.2 are arranged in each plane, of a total of at least two planes, whereby only one of the planes is visible here. The support rods 11.1 and 11.2 per plane intersect at a coupling point or pivot point 18. The support rods 10 extend obliquely vertically at a defined angle between the spindle support support 8 and a base element, such as a slide 12 shown in Figs. 1 to 7. Advantageously, at least one of the support rods 11 per plane, particularly advantageously the first support rod

[0105] 11.1 or both support rods 11.1 and 11.2 have a spring joint to enable elastic bending or deformation of the support rods 11 and consequently a deflection of the spindle unit 4 about a rotation axis 19 that adapts essentially continuously during the movement of the device 1. The bearing at the pivot point 18 can also be described as a rocker bearing or bearing on two individual spring-loaded balls. This can ensure, in particular, a certain freedom from play. It is also conceivable that a joint is formed in the pivot point 18, about which at least an upper V-shaped part of the support rods 11 can be rotated or tilted. For this purpose, a lower part of the support rods 11 is also designed as an inverted V, so that the two support rod sections meet at the pivot point 18. In this embodiment, it is conceivable that the rotation axis 19 is designed as a rigid, i.e. immovable, rotation axis.A highly precise, backlash-free bearing of the rotary axis can be achieved.

[0106] Due to a displacement of the carriage 12 along the spindle unit's longitudinal axis 30, the entire spindle mount 7 is also displaced. This displacement enables adjustment or setting of the desired or required rotational axis 19 (as shown in Fig. 1) of the spindle unit 4 during its deflection. The displacement or deflection of the delivery spindle 6 can also be advantageously set or adjusted by moving the carriage 12. The carriage 12 advantageously runs in linear rails (not shown here), which also extend along the spindle unit's longitudinal axis 30.

[0107] Furthermore, the detection segment 2 has an adjusting element 14 and a measuring unit 15, each of which is operatively connected to the delivery spindle 6. The adjusting element 14 is, for example, a cylinder, such as a pneumatic pressure cylinder, or an electric actuator, such as a crank drive, worm spindle, or loaded worm drive, and serves to deflect the spindle unit 4 and consequently the gauge gear 13 connected to this spindle unit 4 from a rest position, as shown in Figures 1 and 2 or 6, into a retracted position, as shown in Figures 3 and 4, and from a retracted position to an engaged position, as shown in Figures 5 and 7. The measuring unit 15 is, for example, a measuring probe which detects the deflections transmitted from the gauge gear 13 via the pick-up spindle 5 to the delivery spindle 6 when measuring the concentricity of the internal toothing 22 of the component 20.It is conceivable that the measuring unit 15 and the adjustment element 14, as shown in Figures 1 to 7, are arranged on a holding table 16. The holding table 16 is preferably displaceable in the direction of the spindle longitudinal axis 30. Particularly advantageously, the holding table 16 is movable in more than one degree of freedom, but can also be moved and / or tilted horizontally, orthogonally to the spindle unit longitudinal axis and / or vertically, in particular tilted forwards and / or tilted laterally. It is conceivable that the carriage 12 is arranged on the holding table 16 and can advantageously be moved thereon in the spindle unit longitudinal direction 30. According to Figures 1 to 7, the device 1 also has a component receiving segment 3, which serves to receive the component 20 and hold it in a defined position, advantageously rotating it about its component longitudinal axis 31.The component receiving segment 3 has at least one bearing element 17, advantageously two bearing elements 17 spaced apart from one another as viewed in the direction of the component longitudinal axis 31, in order to enable a sufficiently process-reliable storage of the component 20.

[0108] As shown in Figures 1 and 2 as well as 6, the spindle unit 4 and accordingly the gauge gear 13 are in a rest position. In this position, the spindle unit 4 is not deflected and the gauge gear 13 is not in engagement with the internal toothing 22 of the component 20 to be measured. In Figures 3 and 4, however, by actuating the adjusting element 14, i.e. by activating or deactivating the adjusting element 14 (depending on which tool is selected as the adjusting element), the spindle unit 4 is deflected, i.e. moved or pivoted about a preferably non-rigid axis of rotation 19, as shown schematically in Fig. 1. As a result, the gauge gear 13 is moved upwards, in particular raised, essentially in a vertical direction.After a deflection of the spindle unit 4 has occurred, the holding table 16 is advantageously activated to execute a movement along the spindle unit's longitudinal axis 30 in the direction of the component receiving segment 2. As a result, the gauge gear 13 is introduced into a recess 21 of the component 20, in which the internal toothing 22 to be measured is formed. After the gauge gear 13 has been positioned in a retracted position and this gauge gear 13 has been introduced into the recess 21 of the component 20, as shown in Figures 3 and 4, the spindle unit 4 is deflected again. This renewed deflection of the spindle unit 4 is in turn effected by the adjustment element 14, which is activated or deactivated depending on the tool design. During the renewed deflection, the spindle unit 4 and consequently the gauge gear 13 are moved from the retracted position into an engaged position, as shown in Figures 5 and 7.As a result, a movement, in particular a tilting of the spindle unit, about the non-static axis of rotation 19, as shown schematically in Fig. 1, takes place again, whereby the gauge gear 13 is moved downward in a vertical direction. After the movement has been completed, the gauge gear 14 advantageously meshes with its teeth into a section of the internal toothing 22 of the component 20, as also shown in Figures 5 and 7.

[0109] It is conceivable that the gauge gear 13 is brought into engagement with the internal toothing 22 of the component 20 in such a way that it rests on a lower region of the internal toothing 22 - viewed in the vertical direction - by its weight alone or advantageously in combination with the spring force or with the force of an electric drive of the spindle mounting base 9 in order to have a required contact pressure. This can be seen in particular in Fig. 5. An alternative to this is shown in Fig. 7. In this embodiment, the gauge gear 13 is brought into engagement with the internal toothing 22 of the component 20 in such a way that it engages in an upper region of the internal toothing 22 - viewed in the vertical direction. For this, it is necessary to generate a corresponding contact pressure.The required contact pressure of the gauge gear 13 is generated, for example, by means of the spindle holder 7, in particular the spindle holder base 9, in effective cooperation with the adjusting element 14, which can exert a defined tensile force on the spindle unit 4 and consequently the delivery spindle 6. As with the arrangement of the gauge gear 13 in the lower region of the internal gearing 22, before the gauge gear 13 is applied, the spindle unit 4 must be deflected or pivoted from a rest position, as shown in Fig. 6. Furthermore, it is also possible to move the entire holding table 16 upwards in a vertical direction to enable reliable engagement of the gauge gear 12 with the internal gearing 22.Furthermore, it is advantageous if the bearing element 17 is arranged above the arranged component 20 in order to enable a defined counterpressure when the contact pressure is applied by the gauge gear 13 to the internal toothing 22, at least during the measuring process. The bearing element 17 can be designed as a steady rest.

[0110] It should therefore be noted that for the determination of the concentricity of an internal toothing 22 and in particular the detection of concentricity errors of this internal toothing 22 of a component 20, it is not relevant in which section of the internal toothing 22 - viewed in the circumferential direction - the gauge gear 13 is brought into meshing engagement with the internal toothing 22.

[0111] Reference is made below to Figs. 8 to 17 and 18 (ac) to 21 (ac).

[0112] According to the invention, the device for measuring concentricity is equipped with a compressed air cleaning device.

[0113] The pick-up spindle 5 preferably has a pin 105, in particular a bearing pin, for rotatably, or possibly also fixedly, receiving the gauge gear 13. The pick-up spindle 5 or the pin 105 is preferably equipped with a receiving area 106 for the gauge gear 13.

[0114] The following definitions of terms should be used below.

[0115] In the context of the inventive concept, air flow refers to the entire compressed air path (including lubricated compressed air) from the compressed air inlet 107 to the air outlet 104 on the gauge gear 13. From the air outlets 104, the compressed air or the compressed air-oil mixture is sprayed toward the internal gearing 22 to be measured. Lubricated compressed air, i.e., compressed air mixed with a lubricant, can also be used as compressed air.

[0116] In the context of the inventive concept, the air guide channel 101 is understood to be an axial, continuous, preferably internally centered, cavity, in particular a bore, preferably in the pick-off spindle 5, for the directed and controlled passage of compressed air. The air guide channel 101 can open into an air outlet channel 102 or directly into an air outlet channel 103 of the gauge gear 13.

[0117] In the context of the inventive concept, the air outlet duct 102 is understood to be a radially outwardly directed outlet duct adjoining the air guide duct 101, in particular for conveying compressed air into the gauge gear 13. The air outlet duct 102 is introduced into the receiving area 106 for the gauge gear 13, preferably from the outside, in particular as a bore.

[0118] In the sense of the inventive idea, the air outlet channel 103 is understood to be one or more radially outwardly directed bores / recesses in the gauge gear 13.

[0119] In the sense of the inventive concept, air outlet 104 is understood to be the outlet area on the gauge gear 13 through which the compressed air impacts into or onto the toothing area of ​​the component to be measured that is to be cleaned.

[0120] A compressed air cleaning device according to the invention comprises an air duct. The air duct comprises an air duct 101, an air outlet duct 102, an air outlet duct 103, and / or an air outlet 104.

[0121] The compressed air or lubricated compressed air is fed in via the compressed air inlet 107. The air duct, in particular the air duct 101, air outlet duct 102, air outlet duct 103 and / or an air outlet 104, and possibly also a plurality of the aforementioned components, are generally fluidically connected, so that the compressed air or lubricated compressed air can enter the air duct 101 via the compressed air inlet 107 and exit from the air outlet 104.

[0122] Various embodiments of the compressed air cleaning device will be described below. The air guide channel(s) 101 and the air outlet channel(s) 102, as part of the pressure cleaning device, are preferably provided in the pick-off spindle 5. However, the compressed air supply can also be provided through the entire spindle unit 4.

[0123] Fig. 8 schematically shows an embodiment of a pressure cleaning device of a device according to the invention for measuring concentricity.

[0124] In particular, a pick-off spindle 5 with a hollow pin 105 with air guide and gauge gear 13 with air guide is shown.

[0125] Accordingly, the compressed air cleaning device shown here is characterized in that the air guide channel 101 is designed as an axially extending channel in the pick-off spindle 5. Two radially aligned air outlet channels 102 are provided in the pin 105. The air guide channel 101 in the pick-off spindle 5 is designed without any dams; in other words, the air guide channel 101 has a constant cross-section over its length.

[0126] Fig. 9 schematically shows a further embodiment of a pressure cleaning device of a device according to the invention for concentricity measurement.

[0127] In particular, a pick-off spindle 5 with an air guide channel 101 is shown, which has a tapered diameter, in particular to achieve a nozzle effect. An air outlet channel 102 is designed at a 90° angle to the spindle unit's longitudinal axis 30.

[0128] Accordingly, the compressed air cleaning device shown here is characterized in that the air guide channel 101 is designed as an axially extending channel in the pick-off spindle 5. A radially aligned air outlet channel 102 is provided in the pin 105. The air guide channel 101 in the pick-off spindle 5 is continuously tapered, in particular conical. The air guide channel 101 tapers particularly in the direction of the pin 105. Furthermore, in Fig. 9, representative of all related illustrations, a receiving area 106 on the pin 105 for the gauge gear is sketched.

[0129] In Fig. 10, a further embodiment of a pick-off spindle 5, a gauge gear 13 and a pressure cleaning device of a device according to the invention for concentricity measurement is shown schematically.

[0130] In particular, a pick-off spindle 5 with an air guide channel 101 is shown, which has a constant diameter.

[0131] Accordingly, the compressed air cleaning device shown here is characterized in that the air guide channel 101 is designed as an axially extending channel in the pick-off spindle 5. A radially aligned air outlet channel 102 is provided in the pin 105. The air guide channel 101 in the pick-off spindle 5 is designed without any dams; in other words, the air guide channel 101 has a constant cross-section over its length.

[0132] In Fig. 11, a further embodiment of a pressure cleaning device of a device according to the invention for concentricity measurement is shown schematically.

[0133] In particular, a tap spindle 5 with dams in the air duct 101 is shown, in particular for achieving a nozzle effect.

[0134] Accordingly, the compressed air cleaning device shown here is characterized in that the air guide channel 101 is designed as an axially extending channel in the tap spindle 5. A radially aligned air outlet channel 102 is provided in the pin 105.

[0135] The air duct 101 is equipped with dams. In other words, the air duct 101 has sections with different cross-sections. In particular, it is provided that the duct 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. It is provided that the third section 101c is arranged on the side of the pickup spindle 5 facing the pin 105, and the first section 101a is arranged on the side facing away from the pin 105. The second section 101b is arranged between the first section 101a and the third section 101c. It is provided that the first cross-section A1 is larger than the second cross-section A2, and the second cross-section A2 is larger than the third cross-section A3. This results in the dams already mentioned above.

[0136] In Fig. 12, a further embodiment of a pressure cleaning device of a device according to the invention for concentricity measurement is shown schematically.

[0137] In particular, a pick-off spindle 5 with a circumferential groove 108 in the pin is shown.

[0138] Accordingly, the compressed air cleaning device shown here is characterized in that the air guide channel 101 is designed as an axially extending channel in the pick-off spindle 5. A radially aligned air outlet channel 102 is provided in the pin 105. The air guide channel 101 in the pick-off spindle is continuously tapered, in particular conical. The air guide channel 101 tapers in particular in the direction of the pin 105. Furthermore, the pin 105 is provided with a circumferential groove 108. The radially aligned air outlet channel 102 opens into the circumferential groove 108.

[0139] Fig. 13 shows a further embodiment of the compressed air cleaning device in a sectional view.

[0140] In particular, a pick-off spindle 5 is shown with an air outlet channel 102 designed obliquely to the spindle unit longitudinal axis, for example 135° to the spindle unit longitudinal axis 30.

[0141] Accordingly, the compressed air cleaning device shown here is characterized in that the air guide channel 101 is designed as an axially extending channel in the pick-off spindle 5. An air outlet channel 102 is provided in the pin 105, oriented obliquely to the spindle unit's longitudinal axis 30. The air outlet channel 102 can, for example, assume an angle of 135° to the spindle unit's longitudinal axis 30. The air guide channel 101 in the pick-off spindle is designed without any dams; in other words, the air guide channel 101 has a constant cross-section over its length.

[0142] Figure 14 shows a further embodiment of the compressed air cleaning device in a sectional view. In particular, a tap spindle 5 with dam stages and several air outlet channels 102 is shown.

[0143] Accordingly, the compressed air cleaning device shown here is characterized in that the air guide channel 101 is designed as an axially extending channel in the tap spindle 5. Two radially aligned air outlet channels 102 are provided in the pin 105.

[0144] The air duct 101 is equipped with dams. In other words, the air duct 101 has sections with different cross-sections. In particular, it is provided that the duct 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. It is provided that the third section 101c is arranged on the side of the pickup spindle 5 facing the pin 105, and the first section 101a is arranged on the side facing away from the pin 105. The second section 101b is arranged between the first section 101a and the third section 101c. It is provided that the first cross-section A1 is larger than the second cross-section A2, and the second cross-section A2 is larger than the third cross-section A3. This results in the dams already mentioned above.

[0145] In Figs. 15 to 17, further embodiments of a pressure cleaning device of a device according to the invention for concentricity measurement are shown schematically.

[0146] In particular, embodiments of the pressure cleaning device with one or more air guide channels 101, but without an air outlet channel 102, are shown.

[0147] The air duct 101 through the pick-off spindle 5 is aligned obliquely to the spindle unit's longitudinal axis 30. The air duct 101 can, for example, be conical or include retaining stages. In principle, it can, of course, also have a consistently constant cross-section. One, two, or more air ducts 101 can run through the pick-off spindle. The air duct 101 or ducts 101 can also open directly into the pin surface or have an outlet. In other words, the air outlet duct 102 outlined above can also be omitted. Reference is made below to Figs. 18 to 18c, 19 to 19c, 20 to 20c, and 21 to 21c. Figs. 18, 19, 20 and 21 respectively show embodiments of the gauge gear 13 of the device 1 according to the invention for concentricity measurement. The air outlet channels 103 or air outlets 104 as part of the pressure cleaning device are provided in particular in the gauge gear 13.The gauge gear 13 as such has a bore 131. The pin 105 can be inserted into the bore 131 accordingly.

[0148] First, reference is made to Figs. 18 to 18c. This shows a gauge gear with circular-arc tooth flanks.

[0149] Air outlet channels 103 are provided, extending from the bore 131 into the tooth tips. The respective air outlet 104 is arranged at the end of the respective air outlet channel 103, in this case in the tooth tips. In this embodiment, the air outlet channels 103 are arranged on the horizontal centerline (axis of symmetry) 332 of the gauge gear 13 around the rotational axis 32 of the gauge gear 13.

[0150] Reference is made below to Figs. 19 to 19c. This is a gauge gear with circular-arc tooth flanks.

[0151] Air outlet channels 103 are provided, extending from the bore 131 into the tooth bases. The respective air outlet 104 is arranged at the end of the respective air outlet channel 103, in this case in the tooth bases. In this embodiment, the air outlet channels 103 are arranged on the horizontal centerline (axis of symmetry) 332 of the gauge gear 13 around the rotational axis 32 of the gauge gear 13.

[0152] Reference is made below to Figs. 20 to 20c. This shows a gauge gear 13 in which the tooth flanks are involute-shaped.

[0153] Air outlet channels 103 are provided, extending from the bore 131 into the tooth tips. The respective air outlet 104 is arranged at the end of the respective air outlet channel 103, in this case in the tooth tips. In this embodiment, the air outlet channels 103 are arranged on the horizontal center line (axis of symmetry) 332 of the gauge gear 13 around the rotational axis 32 of the gauge gear 13. Reference is made below to Figs. 21 to 21c. This shows a gauge gear 13 in which the tooth flanks are involute-shaped.

[0154] Air outlet channels 103 are provided, extending from the bore 131 into the tooth bases. The respective air outlet 104 is arranged at the end of the respective air outlet channel 103, in this case in the tooth bases. In this embodiment, the air outlet channels 103 are arranged on the horizontal center line (axis of symmetry) xy of the gauge gear 13 around the rotational axis of the gauge gear 13.

[0155] Reference is made below to Figs. 22 to 22b.

[0156] The spindle unit 4, in particular the pick-up spindle 5, is one-piece here and ultimately forms the delivery spindle 6 and the pick-up spindle 5.

[0157] The air guide channel 101 extends from the compressed air supply 107 along the spindle 5 to the air outlet channel 102 / gauge gear 13 / air outlet channel 103 or air outlet 104.

[0158] The spindle 5 is rotatable about a pivot point D on a tool bed.

[0159] An adjustment (and if necessary measurement) is possible via elements, in particular adjustment element 14 or measuring unit 15, at the other end of the spindle 5 facing away from the gauge gear 13.

[0160] Fig. 22a and 22b show two exemplary embodiments of how the air duct 101 can be formed.

[0161] In particular, Fig. 22a shows that the spindle 5, with a groove 111 or a similar configuration, creates a recess relative to the outer surface. A tube 110 encompassing the spindle 5 and covering the groove 111 forms a groove 111 of the air guide channel 101.

[0162] In particular, Fig. 22b shows the spindle 5 and the tube 110, which has a larger diameter than the spindle 5 and is mounted at a distance from the spindle 5, so that a gap is formed between the tube 110 and the spindle 5, which forms the air guide channel 101. Reference is made below to Fig. 23. Figure 23 shows a further embodiment of a gauge gear 13 for a device according to the invention for concentricity measurement in a perspective view. Here, a variant with a partial air outlet 104 is provided. The gauge gear 13 does not have a circumferential groove 109 in the bore 131, and the air outlet opening on the pin 105 or spindle unit 4, in particular the pick-off spindle 5, only supplies the air outlet channels 103 of the gauge gear 13 with an air-oil mixture in a specific angular segment. Thus, only the air outlets 104 of the gauge gear 13 are used, where the teeth orTooth gaps are present shortly before, during, or after the engagement. This depends on the design of the air outlet channel 103 of the spindle 4 and the air outlet channel 103 of the gauge gear 13, as well as the relative position of the air transition cross-sections.

[0163] The following configurations are particularly conceivable: a) The spindle unit 4, in particular the pick-up spindle 5 or the pin 105, has one or more air outlet channels 102, but no circumferential groove above the openings, so that the air cannot be transported radially, but can only be transferred to a "congruent" air outlet channel 103 in the gauge gear. b) Depending on the position of the air outlet 104a on the pick-up spindle 5 relative to the air outlet channel 103 (air inlet) of the gauge gear 13, not all air inlet channels 103 on the gauge gear 13 are supplied with / pressurized with the oil-air mixture.

[0164] Alternatively, it is conceivable for the air outlet channels 103 to extend alternately from the bore 131 toward the tooth tips and the tooth roots. Other pairings are also conceivable. The air outlets 104 are arranged at the ends of the air outlet channels 103. Thus, the air flow is directed alternately through the air outlet 104 of the tooth tip and then through the air outlet 104 of the subsequent tooth root.

[0165] Reference is made below to Fig. 24.

[0166] Figure 24 shows a sectional view of an embodiment of a device for concentricity measurement with a pressure cleaning device according to the invention. In particular, the air guide channel 101 extending through the spindle unit 4, in particular the pick-off spindle 5 and the discharge spindle 6, is visible. The compressed air or lubricated compressed air is fed in via the compressed air inlet 107 and guided through the air guide channel 101 to the gauge gear 13 and its air outlet channels 103.

[0167] The device for concentricity measurement or compressed air cleaning device can be characterized by the following further features.

[0168] Preferably, an advantageous structurally optimized design of the air guide, in particular compressed air supply to the internal toothing of a component, in particular a shaft, is provided.

[0169] In particular, partial air outlets can be provided on the journal or bearing journal of the pick-up spindle in the receiving or arrangement area of ​​the gauge gear 13. As a result, only the outlet openings or nozzles of the gauge gear that are located immediately before and / or during the engagement of the gauge gear with the internal toothing 22 of a component 20, in particular a shaft, are pressurized with compressed air.

[0170] In particular, it can be provided that the air guide is designed in such a way that the gearing of the shaft is pressurised or supplied with lubricated compressed air before the actual measurement.

[0171] In particular, it can be provided that the air guide is designed in such a way that the friction surfaces between the bore 131 of the gauge gear 13 and / or flat surfaces of the gauge gear 13 can also be pressurized or supplied with oiled compressed air.

[0172] In particular, it can be provided that the gauge gear 13 is equipped with an air guide.

[0173] In particular, it can be provided that the pick-off spindle 5 with hollow pin 105 is equipped with an air guide.

[0174] In particular, it can be provided that the gauge gear 13 rotates on the pick-up spindle 5, in particular the pin 105.

[0175] In particular, it can be provided that the gauge gear 13 is arranged axially fixed but rotatable on the pin 105 of the pick-off spindle 5. In particular, it can be provided that the gauge gear 13 and the pick-off spindle 5 rotate together.

[0176] In particular, it can be provided that the gauge gear 13 is arranged axially fixed and non-rotatable on the pick-up spindle 5, in particular the pin 105.

[0177] In particular, it can be provided that the air guide of the pick-off spindle 5 is designed as an internally centered air guide channel 101, which has an air outlet 104a in the direction of the side receiving the gauge gear 13.

[0178] The air guide channel 101 can have various geometric configurations which generate or promote a nozzle effect in the direction of the side of the air guide channel 101 which receives the gauge gear 13.

[0179] Particularly advantageous embodiments are when the air guide channel 101 is designed with a constant diameter or the air guide channel 101 is designed with one or more diameter jumps, in particular barrages, or stepped or narrowing diameters, in particular for generating a jet effect or acceleration effect in the direction of the side receiving the gauge gear 13.

[0180] It can preferably further be provided that the air guide channel 101 has a continuously tapered, in particular conical, diameter in the direction of the side receiving the gauge gear 13, in particular to achieve a nozzle effect or acceleration effect.

[0181] As an alternative to internal centering, the air duct 101 or air ducts can also be installed axially obliquely in the pick-off spindle 5. This eliminates the need for the radially outwardly directed outlet duct 102 to the air duct for air outlet, as outlined above. The air duct 101 can, for example, be directed radially outward at an angle of 45° to the spindle unit's longitudinal axis 30 of the pick-off spindle 5. The air duct(s) 101 are designed with a constant diameter, one or more diameter jumps, or continuously tapered, in particular conical, diameters. The air duct(s) 101 are preferably arranged in the pick-off spindle 5 in such a way that no imbalance is created or counteracted.

[0182] The air outlet channel 102 of the pick-up spindle 5 is preferably designed as at least one radially outwardly directed air outlet channel 102, which adjoins or merges with the air guide channel 101 in the receiving area of ​​the gauge gear, in particular at the pin of the pick-up spindle 5. The air guide channel 101 preferably merges into the air outlet channel 102. The compressed air or oiled compressed air guided through the air guide channel 101 is preferably guided through the air outlet channel 102 to the air outlet channel 103 or air outlet 104.

[0183] Particularly advantageous embodiments are, for example, when the air outlet channel 102 is directed radially outwards at an angle of 45° to 135°, preferably at 90°, to the spindle unit longitudinal axis 30 of the pick-off spindle 5.

[0184] The air outlet duct 102 preferably has a constant diameter dimension.

[0185] The diameter of the air outlet duct 102 preferably has a diameter that is smaller than the smallest diameter of the air guide duct 101. This can enhance the nozzle effect.

[0186] The air outlet channel 102 can have a continuous diameter expansion in the flow direction.

[0187] The air outlet channel 102 can open into a partial groove or a circumferential groove.

[0188] Furthermore, it is conceivable that several air outlet channels 102 are arranged radially circumferentially at the end of the air guide channel 101.

[0189] The air duct of the gauge gear is preferably configured as at least one air outlet duct 103, preferably a plurality of air outlet ducts 103, which are preferably arranged on or in the gauge gear 13 in such a way as to ensure the most optimal possible supply of (lubricated) compressed air to the internal toothing of the component to be measured. A particularly advantageous configuration of the outlet ducts 103 is, for example, to direct the air outlet ducts 103 toward the tip circle, root circle, and / or tooth flank of the toothing of the gauge gear 13, in particular per tooth, root, and / or tooth flank.

[0190] The preferred geometric configuration of the air outlet duct 103 is cylindrical. However, other geometric configurations are also conceivable, particularly configurations that further enhance the nozzle effect.

[0191] For each individual tip circle and / or root circle and / or tooth flank(s) of the toothing of the gauge gear 13, the design of one or more air outlet channels 103 is conceivable.

[0192] The arrangement of the air outlet channel(s) 103 in the tip circle and / or root circle and / or tooth flanks of the gauge gear 13 can be carried out in different combinations.

[0193] In a further advantageous embodiment, the gauge gear 13 can have a partial or circumferential groove 109 in the joining area to the pin 105 for better compressed air distribution to the respective air outlet channels 103.

[0194] The multiple (at least one) air outlets 104 on the gauge gear 13 can have different geometric configurations. In particular, a circular air outlet, an elliptical air outlet, in particular a tapered air outlet, or a rectangular air outlet, for example, by erosion, can be provided.

[0195] In an advantageous embodiment of the invention, it can be provided that the air transition from the pick-off spindle 5 can open into several air outlet channels 103 of the gauge gear 13.

[0196] Preferably, a nozzle effect can be created at the air outlet 104 of the gauge gear 13, in particular by a small gap between the gauge gear 13 and the gearing to be measured.

[0197] The gauge gear 13 is preferably pressed onto the pick-off spindle 5 if the pick-off spindle 5 itself is rotatably mounted. Otherwise, i.e., if the pick-off spindle 5 is not rotatable, the gauge gear 13 is rotatably mounted on the pick-off spindle 5, in particular the pin 105. However, it is also conceivable for the gauge gear 13 to be connected to the pick-off spindle 5 in another form-fitting, force-fitting, or even material-fitting manner.

[0198] In a further advantageous embodiment, it can be provided that the tooth shape of the gauge gear 13 is designed as a circular arc.

[0199] In a further advantageous embodiment, it can be provided that the tooth shape of the gauge gear 13 is designed as an involute.

[0200] In a further advantageous embodiment, it can be provided that the tooth shape of the gauge gear 13 is designed as a cylindrically ground circular arc, as a radius / circular arc continuously cylindrical, as an involute continuously cylindrical, as a radius / circular arc spherical design or as an involute spherical design.

[0201] In a further advantageous embodiment, it can be provided that the tooth shape of the gauge gear 13 is designed as a cylindrically ground involute.

[0202] It is clear that the device, in particular its compressed air cleaning device, in particular its air guide, air guide channel 101, air outlet channel 102, air outlet channel 103 and / or air outlet 104, can have numerous designs, not all of which are shown here.

[0203] In particular, it can be provided that one or more air guide channels 101 are provided within the pick-off spindle 5, and / or the air guide channel 101 or the air guide channels 101 is or are aligned straight or obliquely with respect to the spindle unit longitudinal axis 30, and / or the air guide channel 101 or the air guide channels 101 is or are equipped with a constant cross-section over the length, conical or with steps.

[0204] In particular, it can be provided that one or more air outlet channels 102 are provided in the pick-up spindle 5, in particular in the pin 105 of the pick-up spindle 5, and / or the air outlet channel 102 or the air outlet channels 102 are aligned radially or obliquely with respect to the spindle unit's longitudinal axis 30. In particular, it can be provided that a circumferential or at least partially circumferential groove 108 is provided in the pin 105, wherein the air outlet channel(s) 102 open into the groove 108.

[0205] In particular, it can be provided that air outlet channels 103 are arranged in the gauge gear 13, which extend from the bore in the direction of the tooth tips, tooth flanks and / or tooth roots.

[0206] In particular, it can be provided that the air outlets are arranged at the end of the air outlet channels in the tooth tips, tooth flanks and / or tooth roots.

[0207] In a preferred embodiment of the device, the compressed air cleaning device, in particular the air guide, in particular the gauge gear 13, is designed such that only those tooth gaps of the gauge gear 13 that are just about to touch and / or in contact with the internal gearing 22 to be measured are subjected to compressed air. This can be implemented structurally, for example, by aligning the air outlet channel 102 with respect to the contact of the tooth gaps of the gauge gear 13 with the internal gearing 22 to be measured.

[0208] The process according to the invention will be explained in more detail below. It is understood that only a few selected process steps are presented here, as they are helpful for understanding the process according to the invention. The process may include further steps or intermediate steps known to those skilled in the art.

[0209] 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, with a device according to the invention comprises the method step of cleaning, in particular blowing out, the internal toothing 22 by means of the compressed air cleaning device.

[0210] The air duct, particularly in the form of bores, is preferably provided in the root circle of the gauge gear 13, and the air outlet 102 of the pick-off spindle 5, particularly of the pin 105, for the gauge gear 13 is preferably designed such that only those tooth gaps of the gauge gear 13 that are just about to touch and / or in contact with the internal gear 22 to be measured are subjected to compressed air. In this position, the greatest possible jet effect should be created between the tooth gap of the gauge gear 13 and the respective tooth of the measurement object, which increases the air flow velocity and thus also advantageously cleans the internal gear 22. The air pressure should preferably be selected such that no radial deflection of the measuring setup and thus no measurement error can occur.

[0211] The method according to the invention is further preferably characterized by additional or simultaneous cleaning of the component, in particular the shaft, particularly indirectly via the gauge gear 13, during the measurement, particularly directly after the gear cutting process, using compressed air or oiled compressed air. In the case of oiled compressed air, this results in particular in lubrication of the gauge gear 13. The compressed air or oiled compressed air is guided, in particular via the pick-off spindle 5, through the gauge gear 13 into the internal gearing 22.

Claims

Claims 1. Device (1) for measuring the concentricity of an internal toothing (22) of a component (20), in particular a shaft, wherein the device (1) comprises at least one determination segment (2) for determining a concentricity deviation - a spindle unit (4) comprising a pick-up spindle (5) with a gauge gear (13) arranged at a first end of the pick-up spindle (5) for picking up the concentricity of the internal toothing (22) of the component (2), and a delivery spindle (6) for transmitting the picked-up concentricity from the pick-up spindle (5) to a measuring unit (15), wherein the delivery spindle (6) is arranged directly or indirectly at a second end of the pick-up spindle (5), which is opposite the first end of the pick-up spindle (5), and - a spindle holder (7) at least for holding and positioning the pick-up spindle (5) or the delivery spindle (6), advantageously the spindle unit (4), - an adjusting element (14) at least for positioning at least the gauge gear (13) connected to the pick-off spindle (5), and - the measuring unit (15) for comparing the measured concentricity with reference values, characterized in that the device is equipped with a compressed air cleaning device.

2. Device according to claim 1, characterized in that the pick-up spindle (5) is equipped with a pin (105) for rotatably or fixedly receiving the gauge gear (13) and / or the pick-up spindle (5) is designed for rotatably or fixedly receiving the gauge gear (13).

3. Device according to at least one of the preceding claims, characterized in that the compressed air cleaning device comprises an air guide in the device, in particular in the pick-up spindle (5), the delivery spindle (6) and / or the gauge gear (13).

4. Device according to at least one of the preceding claims, characterized in that the compressed air cleaning device, in particular its air guide, comprises at least one air guide channel (101) arranged in the pick-off spindle (5), an air outlet channel (102) arranged in the pick-off spindle (5), an air outlet channel (103) arranged in the gauge gear (13) and / or an air outlet (104) arranged in the gauge gear (13).

5. Device according to at least one of the preceding claims, characterized in that - the pick-off spindle (5) has a spindle unit longitudinal axis (30), wherein - one or more air guide channels (101) are provided within the pick-up spindle (5), and / or - the air guide channel (101) or the air guide channels (101) are aligned straight or obliquely with respect to the spindle unit longitudinal axis (30), and / or - the air duct (101) or the air ducts (101) are or are equipped with a constant cross-section over the length, conical or with steps.

6. Device according to at least one of the preceding claims, characterized in that - one or more air outlet channels (102) are provided in the pick-up spindle (5), in particular in the pin (105) of the pick-up spindle (5), and / or - the air outlet duct (102) or the air outlet ducts (102) are aligned radially or obliquely with respect to the spindle unit longitudinal axis (30).

7. 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 pin (105), wherein the air outlet channel(s) (102) open into the groove (108).

8. Device according to at least one of the preceding claims, characterized in that the gauge gear (13) comprises a bore 131 for receiving on the pick-off spindle (5), wherein air outlet channels (103) in the gauge gear (13) are arranged, wherein the air outlet channels (103) extend from the bore (131) in the direction of the tooth tips, tooth flanks and / or tooth roots of the gauge gear (13).

9. Device according to at least one of the preceding claims, characterized in that the air outlets (104) are arranged at the ends of the air outlet channels (103) in the tooth tips, tooth flanks and / or tooth roots of the gauge gear (13).

10. Device according to at least one of the preceding claims, characterized in that the compressed air cleaning device, in particular the air guide, in particular the gauge gear (13), is designed such that only the tooth gaps of the gauge gear (13) are subjected to compressed air which are shortly before contact and / or in contact with the internal toothing (22) to be measured.

11. Device according to at least one of the preceding claims, characterized in that the air outlets (104) on the gauge gear (13) are designed as circular air outlets, elliptical air outlets, in particular narrowing air outlets, or rectangular air outlets.

12. Device according to at least one of the preceding claims, characterized in that the gauge gear (13) comprises a circumferential or at least partially circumferential groove (109) in the joining area to the pin (105).

13. Method for cleaning a component, in particular an internal toothing of the component, with a 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 out, by means of the compressed air cleaning device.

14. Method according to claim 13, characterized in that the cleaning of the component, in particular the internal toothing (22) of the shaft, takes place during the measurement, in particular directly after the toothing process.

15. Method according to at least one of the preceding claims, characterized in that the cleaning is carried out by means of compressed air or oiled compressed air, in particular that the internal toothing (22) is blown out by means of compressed air or oiled compressed air.

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