Rolling test controlled trimming

Abstract

The invention relates to a method comprising the following method steps: grinding a plurality of toothed components (2) by means of a dressable grinding tool (4); performing a rolling test on two or more of the toothed components (2); dressing the grinding tool (4), a dressing demand of the grinding tool (4) being determined prior to the dressing; wherein the dressing requirement of the grinding tool (4) is determined as a function of the result of the rolling test of the two or more toothed components (2).

Description

Technical Field

[0001] The invention relates to a method comprising the following method steps: grinding a plurality of toothed components by means of a dressable grinding tool; performing a rolling test on two or more of the toothed components; and dressing the grinding tool, wherein the dressing requirement of the grinding tool is determined before dressing. Background Art

[0002] Rolling tests on toothed components are used for quality assurance. In particular, the rolling test can be used to check the rotational error and noise behavior of the toothing. In the series production of toothed components, test benches are used for rotational error and noise diagnosis, wherein up to 100% of the components produced can be tested, depending on the manufacturer or customer specifications. Within the scope of the widespread process chain "pre-toothing - hardening - grinding", the rotational error test and the noise test thus constitute a quality control after hard finishing by grinding.

[0003] It is also known to test the meshing arrangements in a transmission, wherein such tests are referred to as "end-of-line tests" (EOL tests). In this case, the meshing arrangement to be tested is installed in a transmission housing which is configured or comparable to the actually delivered transmission. Such EOL tests test the meshing arrangement under operating conditions that are as realistic as possible, wherein the EOL tests can take place, for example, on a transmission test bench. For example, the operating conditions or the expected operating loads are simulated on this transmission test bench.

[0004] Testing of the toothing on a rolling test bench therefore differs from an EOL test in particular in that the toothing itself is tested without it being installed in a transmission housing that reflects the actual, fully assembled state.

[0005] In many cases, the grinding of the corresponding toothed structures is carried out with the aid of a dressable grinding tool, such as a dressable grinding disk or a dressable grinding worm. These dressable grinding tools consist essentially of cutting particles or abrasive grains, such as corundum or the like, which are embedded, for example, in a ceramic bond or a synthetic resin bond. This bond is also referred to as a matrix. The dressable volume of such a grinding tool therefore consists of the matrix material, the abrasive grains bonded therein and the pores of the matrix.

[0006] With increasing use, the dressing of grinding tools loses its original shape due to wear. In addition, the abrasive grains on the outside become blunt due to the grinding contact, and impurities can be added to the pores and inter-grain spaces. The dressing of grinding tools serves to sharpen the relevant grinding tool and to restore the predetermined profile shape of the grinding tool again. Thus, the grinding disc is returned to the desired geometry. In addition, the blunted grain layer is removed, the sharp or cuttable grain layer is exposed, and thus impurities are also removed.

[0007] A particular challenge during dressing is to choose the best possible time for dressing the grinding tool. Dressing too early means wasting the still usable volume of the grinding tool. As a result, the abrasive grains of the grinding tool are not optimally utilized and fewer components are produced with the relevant grinding tool than the grinding tool allows.

[0008] Too late dressing can lead to overloading and damage of the grinding tool, so that the grinding tool can be generally unusable. In addition, too late dressing can also lead to the production of defective components, because, for example, grinding burns appear on the machined surface, or the grinding tool no longer has the required removal performance during the grinding process. Defective geometry of the grinding tool caused by wear can also lead to the production of defective geometry at the ground component. In addition, the desired surface roughness of the ground tooth surface may not be achieved.

[0009] Therefore, in doubtful cases, dressing too early appears to be preferred to dressing too late, since damage to the grinding tool and the production of defective parts should be avoided in any case. Therefore, in operating practice, the dressing interval is usually estimated from a safe point of view, that is, the dressing interval is selected to be too short rather than too long.

[0010] The method for determining the dressing requirement is to monitor the condition of the grinding tool by means of tactile or optical measuring methods. Dressing is performed based on the measurement results of the tactile or optical measurement. The dressing requirement is therefore determined based on the tool wear measured on the grinding tool itself. The dressing cycle is therefore determined with reference to the grinding tool.

[0011] Another way is to trigger dressing after machining a predetermined number of components. In this case, empirical values ​​are usually used. That is, the dressing cycle is determined based on the volume removed by the grinding tool on the workpiece as a whole, wherein the removed volume is matched to the dressing requirement based on empirical values. Therefore, the dressing cycle is determined based on the removed volume.

[0012] In both cases, however, there is a risk of wasting abrasive grain, since the grinding tool in question may still be able to produce good components. The available volume of the grinding tool or the abrasive grain of the grinding tool may not be optimally utilized. Summary of the invention

[0013] Against this background, the present invention is based on the technical problem of specifying a method which enables the most efficient possible utilization of a dressable grinding tool.

[0014] The technical problem described above is solved by the features of the independent claim. Further embodiments of the invention are apparent from the dependent claims and the following description.

[0015] The invention relates to a method comprising the following method steps: grinding at least one toothed component by means of a dressable grinding tool; carrying out a rolling test on the at least one toothed component; dressing the grinding tool, wherein the dressing requirement of the grinding tool is determined before dressing. The method is characterized in that the dressing requirement of the grinding tool is determined based on at least one result of the rolling test.

[0016] The invention is based on the idea that the dressing requirement is not considered from the perspective of the grinding tool or the volume removed, but from the perspective of the ground component or the component quality. This is because, as long as the relevant grinding tool produces good components within a predetermined quality standard, dressing should not be necessary. For this purpose, data or results determined within the scope of a rolling test of at least one toothed component can be used. Since the rolling test is already the subject of quality inspection in many cases, the method according to the invention can be implemented in these cases without purchasing additional machines.

[0017] It may be provided that a plurality of toothed components are ground by means of the dressable grinding tool.

[0018] Provision may be made for a rolling test to be carried out on two or more of the toothed components.

[0019] It may be provided that the dressing requirement of the grinding tool is determined as a function of the results of a rolling test of two or more components.

[0020] In summary, the method according to the invention makes it possible in particular to achieve an optimized and dynamic determination of the dressing requirement, wherein the dressing requirement is determined component-induced or as a function of the component quality. This makes it possible to avoid premature or late dressing. "Dynamic determination of the dressing requirement" means here that the dressing requirement can be determined separately for each dressing cycle. After the first dressing, the dressing requirement may already be required, if possible, after a smaller first number of ground components, while after the second dressing, the dressing requirement may only be required after a larger second number of ground components. This is because the grinding process and tool wear are not necessarily constant when considered over the entire service life of the grinding tool, but can be affected by influencing variables such as temperature fluctuations, coolant supply, vibrations, etc.

[0021] For example, if the component quality is declining rapidly, repairs can be initiated earlier, whereas if stable component quality is observed—in each case based on the results of the rolling test—repairs can be carried out later.

[0022] The grinding of the toothed component is tooth structure grinding. That is, the toothed component has a tooth structure, and the tooth structure is ground by means of a grinding tool.

[0023] A rolling test of a toothed component is a rolling test of the meshing structure of the toothed component. The rolling test of a toothed component is carried out after the meshing structure of the toothed component in question has been completely ground. In this case, the rolling test is carried out on the completely ground component, i.e. in other words, after the grinding process of the respective toothed component has been completed. It is not possible to obtain useful rolling test results while the component in question is being ground. This is because the engagement of the grinding tool with the meshing structure can falsify the results of the rolling test and make them unusable. In addition, the geometry of the meshing structure changes during grinding due to the removal of chips, which means that the geometry of the finished meshing structure cannot be rolled during grinding.

[0024] Dressing of a dressable grinding tool is carried out in particular by means of a dressing tool such as a shape dresser, a point dresser or the like.

[0025] If the dressing requirement of a grinding tool is determined, this may mean in particular that the grinding tool must be dressed before the next toothed component is ground in order to avoid the production of defective components or rejects. Defective components or rejects are toothed components that do not meet the required quality specifications.

[0026] For example, when checking the last 15 toothed components produced, it can be determined that, based on the results of the respective rolling tests of these components, the 17th, 18th or 19th toothed component produced will most likely no longer meet the required quality specifications. This is because, based on the results of the rolling tests, it is possible to extrapolate a deterioration trend of one or more parameters of the rolling tests in order to predict the point in time from which defective components will likely be produced using the grinding tool.

[0027] The result of the rolling test thus indirectly reflects the state of the dressable grinding tool, in particular the wear of the dressable grinding tool, wherein the wear of the dressable grinding tool is currently assessed based on the ability of the dressable grinding tool to produce good components. Therefore, in view of this criterion of the rolling test, the dressable grinding tool is considered to be worn or to be dressed not when wear measured on the grinding tool itself is detected, but when the grinding tool is no longer suitable for grinding toothed components within the required quality specifications.

[0028] If the dressing requirement of the grinding tool is determined, this can mean in particular that the grinding tool must be dressed before the next toothed component is ground and after at least one toothed component has been produced that does not meet the required quality specifications. If necessary, this component that does not meet the required quality specifications can be reprocessed to meet the required quality specifications and, for example, can be ground again. With the above-described approach, the dressing cycles can be maximized, wherein fewer toothed component rejects can be tolerated if possible.

[0029] It can be provided that, in addition to taking into account the results of the rolling test, optical and / or tactile measuring methods are also used to check the condition of the dressable grinding tool in order to determine the dressing requirement. In particular, such supplementary optical and / or tactile measuring methods can be used to correlate the grinding tool wear measured on the dressable grinding tool with the results of the rolling test and / or to detect macroscopic defects of the dressable grinding tool, such as breakages at the cutting edge or at the head of the grinding tool profile, which could lead to the destruction of the dressable grinding tool.

[0030] If a toothed component is mentioned in the present case, this can be in particular a gear or a gear shaft, such as a gear or a gear shaft with helical or spur toothing, a worm wheel or a worm, a bevel gear or the like.

[0031] Provision can be made to carry out a rolling test with the aid of a test bench. This involves carrying out a practical quality inspection of the relevant toothed component. In particular, the test bench is a test bench for rolling tests of toothings and for noise diagnosis.

[0032] It can be provided that the results of the rolling tests carried out with the aid of the test bench are checked with the aid of the analysis software. It can be provided that the dressing requirement of the grinding tool is determined with the aid of the analysis software. In this case, in particular with the aid of the analysis software it can be checked whether one or more absolute values ​​of a specific quality parameter determined within the scope of the rolling test exceed corresponding predetermined limit values ​​and / or whether a change in one or more quality parameters measured from one component to another exceeds predetermined limit values. Comparison of the results from one component to another therefore means that the results of the rolling tests of the relevant components are compared with one another in the chronological order of their production in order to identify trends in the change of the quality parameters considered in the rolling tests.

[0033] In addition to taking into account absolute values, relative reference variables can also be used to evaluate trends and / or changes in quality parameters of the rolling test. Thus, a toothed component that meets quality requirements particularly well can be used as a reference, and the need for repair can be determined based on whether the other toothed components are within a predetermined deviation range relative to this reference, or whether a large deviation from this reference has occurred or is about to occur or is threatening to occur.

[0034] According to one design of the method, it can be provided that the rolling test is performed based on software with the aid of evaluation software, wherein the measurement data of the geometry of the corresponding ground component are input data of the software-based rolling test. The software-based rolling test virtually simulates the test bench test of the actual rolling test. Thus, based on the measurement data of the geometry of the ground component to be subjected to the software-based rolling test, for example, a virtual twin of the component to be tested is created, which rolls, for example, with a virtual main wheel within the scope of the software-based software rolling test. It goes without saying that the analysis can also be performed in a purely numerical manner. In this way, the rotation error can be virtually determined, which can be compared with the rotation error measured in the actual test. Not only the single-sided rolling test but also the double-sided rolling test can be virtually simulated, or calculated based on the measured geometric deviation.

[0035] The measurement data of the corresponding ground component geometry can be determined by means of a coordinate measuring device, in particular by tactile and / or optical measurement. For example, the coordinate measuring device can be a coordinate measuring device with a rotating table, wherein the toothed structure to be measured is held on the rotating table and can be rotated about its own axis during the measurement by means of the rotating table.

[0036] It can be provided that the results of the software-based rolling test carried out with the aid of the evaluation software are checked with the aid of the analysis software. It can be provided that the dressing requirement of the grinding tool is determined with the aid of the analysis software. In particular, it can be checked with the aid of the analysis software whether one or more absolute values ​​of a specific quality parameter determined within the scope of the rolling test exceed corresponding predetermined limit values ​​and / or whether a change in one or more quality parameters measured from one component to another exceeds predetermined limit values. Comparison of the results from one component to another therefore means that the relevant components are compared with one another in the chronological order of their production in order to identify trends in the change of the quality parameters considered in the rolling test.

[0037] In addition to taking into account absolute values, relative reference variables can also be used to evaluate trends and / or changes in quality parameters of the rolling test. Thus, a toothed component that meets quality requirements particularly well can be used as a reference, and the need for repair can be determined based on whether the other toothed components are within a predefined deviation range relative to this reference, or whether there is or is a threat of a large deviation from this reference.

[0038] According to one embodiment of the method, the rolling test includes a rotation error analysis, wherein a repair requirement is present if at least one result of the rotation error analysis exceeds a predetermined limit value and / or if a change in at least one result of the rotation error analysis from one component to another exceeds a predetermined limit value. As already mentioned above, the consideration from one component to another means that components produced one after another are considered in chronological order in order to identify trends in the rotation error change within the scope of the rotation error analysis. Alternatively or additionally, it can be provided that absolute values ​​are considered within the scope of the rotation error analysis, wherein exceeding a limit value for such an absolute value can also mean that a repair requirement is present.

[0039] If the quality criterion determined by one or more results of the rotation error analysis is not met, a correction may be required. For example, characteristic numbers calculated from one or more results of the rotation error analysis may be determined, wherein value ranges for these characteristic numbers may form quality criteria.

[0040] It may be provided that the rolling test comprises a one-sided rolling test.

[0041] According to one embodiment of the method, there is a need for correction if one or more of the following results of the one-sided rolling test exceed corresponding predetermined limit values, and / or there is a need for correction if the variation measured from one component to another exceeds predetermined limit values ​​for one or more of the following results of the one-sided rolling test: concentricity, rolling deviation, concentricity error, tooth-to-tooth amplitude, maximum rolling deviation, transmission error and dynamic backlash, noise behavior, surface defects.

[0042] It may be provided that the rolling test comprises a double-sided rolling test.

[0043] According to one design of the method, there is a need for adjustment if one or more of the results listed below for the double-sided rolling test exceeds a corresponding predetermined limit value; and / or there is a need for adjustment if the variation measured from one component to another exceeds a predetermined limit value for one or more of the results listed below for the double-sided rolling test: center distance, concentricity, rolling runout, rolling deviation, double ball measurement (Zweikugelmaβ), noise behavior.

[0044] The noise test can include recording structure-borne and / or airborne noise within the scope of the rolling test. These data can also be checked for exceeding absolute values ​​and / or for changes measured from one component to another and used to determine the need for repairs.

[0045] The method of a rolling test with rotation error analysis, or in particular the method of a one-sided rolling test and a two-sided rolling test, is prior art and well known. The core of the invention is not the rolling test or the one-sided rolling test or the two-sided rolling test, but the use of the results of such a rolling test, in particular the results of the one-sided rolling test or the two-sided rolling test, to determine the dressing requirement of the dressable grinding tool. Therefore, the invention particularly relates to rolling test-controlled dressing, wherein the term "rolling test control" relates to the identification of the dressing requirement, while the dressing process itself is not controlled by the rolling test. Therefore, if possible, it can also be said to be rolling test-triggered dressing, because the result of the rolling test triggers the dressing of the dressable grinding tool, or the dressing requirement is determined based on the result of the rolling test. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The present invention is described in more detail below with the aid of the accompanying drawings showing embodiments. The accompanying drawings schematically show:

[0047] Figure 1 A flow chart showing a method according to the present invention;

[0048] Figure 2 A grinding worm with gears is shown;

[0049] Figure 3 A one-sided rolling test is shown;

[0050] Figure 4 shows the results of a one-sided rolling test;

[0051] Figure 5 A bilateral rolling test is shown;

[0052] Figure 6 Show Figure 2 Dressing of grinding worms. DETAILED DESCRIPTION

[0053] Figure 1 A flow chart of the method according to the invention is shown. Method steps (A), (B), (C), (D) are shown here one after the other for the sake of simplicity, but can also be partially parallel, i.e. at least partially simultaneously. It goes without saying that each component can only be subjected to the rolling test after it has been completely ground. Therefore, in this case, "parallel" means that the already completely ground component can be transferred to the rolling test while other components are still being ground. This means that the grinding machine and the rolling test bench can be loaded with components and run at the same time. It goes without saying that it is technically unreasonable or impossible to grind the same component and subject it to the rolling test at the same time.

[0054] In method step (A), a plurality of toothed components 2 are ground by means of a dressable grinding tool 4 . Figure 2 By way of example, both one of the toothed components 2 and also the dressable grinding tool 4 are shown.

[0055] The toothed component 2 is a spur gear with external helical teeth. According to an alternative design, the toothed component can be a bevel gear. The toothed component is part of a running meshing structure for power transmission with increasing or decreasing speed and torque, wherein the design of the toothed component is unimportant for the method according to the invention. The method according to the invention can therefore be applied equally to spur gears and also to bevel gears. By way of example and representatively, the following description relates to a component in the form of a spur gear 2 with external helical teeth.

[0056] The spur gear 2 has a toothing 6 with teeth 8 and tooth gaps 10 formed between the teeth, the teeth 8 each having tooth flanks 12, 14 which are ground by grinding with the aid of a grinding tool 4. The grinding tool 4 is a dressable grinding tool, more precisely, in the present case a dressable grinding worm. According to an alternative embodiment, the grinding tool can be a dressable grinding disk or a cup-shaped grinding disk.

[0057] In method step (B), a rolling test is carried out on two or more of the toothed components 2 . Figure 3 By way of example, the schematic structure of a test bench 16 is shown for carrying out a one-sided rolling test on a corresponding toothed component 2 .

[0058] The test bench 16 has a first drive device 18 and a second drive device 20. The first drive device 18 is provided for driving a first shaft 22, on which the toothed component 2 to be tested is mounted.

[0059] The second drive device 20 serves to brake a counter gear 24 which is mounted on a second shaft 26 coupled to the drive device 20 .

[0060] The counter gear 24 is a spur gear with external teeth, which engages with the toothing of the component 2. By driving the toothed component 2 and simultaneously braking the counter gear 24, the speed and torque can be set during the test run. It goes without saying that the speed curve and the torque curve can also be set. The axial distance a1 between the shafts 22, 26 is constant.

[0061] The test bench 16 has a rotary encoder or an angle measuring system 28 , a rotational acceleration sensor 30 and a structure-borne sound sensor 32 .

[0062] Figure 4 By way of example and schematically, the measured rotation error F plotted in [μm] over one revolution U of the gear 2 is shown, i.e. the result of a one-sided rolling test of a single toothed component 2. From this, for example, values ​​for the first-order concentricity error Fr', the tooth-to-tooth amplitude fi' and the maximum rolling deviation Fi' can be determined in a known manner. The rolling test is carried out for two or more components 2 and evaluated.

[0063] In method step (C), the dressing requirement of the grinding tool 4 is determined based on the results of the rolling test of two or more toothed components 2. If a dressing requirement exists, the grinding tool is dressed in method step (D).

[0064] Modification schematically in Figure 6 The dresser 34 engages with the grinding tool 4 and can dress the grinding tool 4, ie reshape it into its predetermined target geometry.

[0065] For example, if one or more of the above-mentioned single-sided rolling test results, namely the first-order concentricity error Fr', the tooth-to-tooth amplitude fi' and the maximum rolling deviation Fi', exceed predetermined limits and / or the variation of such results measured from one component to another exceeds predetermined limits, there is a need for adjustment.

[0066] In the context of a one-sided rolling test, there is one-sided contact between the toothing 4 to be tested and the mating gear 24. This means that the left or right tooth flank of the toothed component 2 rolls against the mating gear 24, specifically at a constant center spacing a1.

[0067] Alternatively or additionally, a double-sided rolling test can be performed in method step (B). Figure 5 2 shows a test bench 36 for a double-sided rolling test by way of example. To avoid repetitions, identical features are provided with the same reference numerals in the following text.

[0068] Bilateral rolling test and above reference Figure 3The difference of the described one-sided rolling test is essentially that the axle spacing a2 is not constant during the test. The mating gear 24 is mounted and supported with its shaft 26 on a movable slide 38. The movable slide 38 is supported on an immovable mating holder 42 by means of a spring device 40.

[0069] By means of the spring device 40 , the counter gear 24 is pressed into tooth contact with the toothed structure 4 to be tested, wherein in the tooth contact there is double-sided contact of the right tooth flank and the left tooth flank of the toothed structure 4 to be tested.

[0070] During the test, i.e. during the rolling of the component 2 with the mating gear 24, the mating gear 24 is pressed with a defined force in the direction of the component 2. Deviations are detected based on the translational displacement of the movable slide 38, wherein the slide 38 is equipped with a travel detector 44 and a vibration detector 46 for recording measurement data. The results of the double-sided rolling test are, for example, rolling concentricity deviation, double-sided rolling deviation and double-sided rolling runout. Based on the results of the double-sided rolling test, the dressing requirement can be determined in method step (C), i.e. a check can be made as to whether the grinding tool needs to be dressed or whether the grinding tool can still produce good components.

[0071] As already mentioned, methods of single-sided rolling tests and double-sided rolling tests are known. The present invention aims to use the results of single-sided rolling tests and / or double-sided rolling tests to determine the dressing needs of a grinding tool.

[0072] Reference numerals list

[0073] 4 Components with teeth

[0074] 6 Meshing structure

[0075] 8 teeth

[0076] 12 tooth surface

[0077] 14 tooth surface

[0078] 16 Test Bench

[0079] 18 First drive unit

[0080] 20 Second drive device

[0081] 22 First axis

[0082] 24 Pairing gears

[0083] 26 Second axis

[0084] 28 Rotary encoders / angle measuring systems

[0085] 30 Rotational acceleration collector

[0086] 32 Structure-borne sound sensor

[0087] 34 Dresser

[0088] 36 Test bench

[0089] 38 Slide

[0090] 40 Spring device

[0091] 42 Mating retainer

[0092] 44 Travel Collector

[0093] 46 Vibration Collector

[0094] (A) Methods and Steps

[0095] (B) Methods and Steps

[0096] (C) Methods and Steps

[0097] (D) Methods and Steps

[0098] a1 Axis spacing

[0099] a2 Axis spacing

Claims

1. A method comprising the following steps: - grinding at least one toothed component (2) by means of a dressable grinding tool (4); - performing a rolling test on the at least one toothed member (2); - Dressing the grinding tool (4), wherein: Determining the dressing requirement of the grinding tool (4) before dressing; It is characterized in that The dressing requirement of the grinding tool (4) is determined based on at least one result of a rolling test.

2. The method according to claim 1, characterized in that: A plurality of toothed components (2) are ground by means of the dressable grinding tool (4).

3. The method according to claim 2, characterized in that A rolling test is performed on two or more of the toothed members (2).

4. The method according to claim 3, characterized in that The dressing requirement of the grinding tool (4) is determined based on the results of a rolling test of two or more components (2).

5. The method according to any one of the preceding claims, characterized in that The rolling test is performed by means of a test bench (16, 36); and / or The rolling test is performed software-based by means of evaluation software, wherein measured data of the geometry of the respective ground component are input data for the software-based rolling test.

6. The method according to any one of the preceding claims, characterized in that The rolling test includes a rotation error analysis, wherein a trimming requirement exists if at least one result of the rotation error analysis exceeds a predetermined limit; and / or If the quality criteria determined by one or more results of the rotational error analysis are not met, there is a need for trimming.

7. The method according to any one of the preceding claims 3 to 5, characterized in that The rolling test includes a rotational error analysis, wherein a trimming requirement exists if, when considered from one component to another, at least one result of the rotational error analysis varies by more than a predetermined limit value.

8. The method according to any one of the preceding claims, characterized in that The rolling test includes a single-side rolling test.

9. The method according to claim 8, characterized in that If one or more of the following results listed for the one-sided rolling test exceed the respectively provided predetermined limit values, there is a need for correction and / or if for one result, a predetermined limit value is exceeded, there is a need for correction: concentricity, rolling deviation, concentricity error, tooth-to-tooth amplitude, maximum rolling deviation, transmission error and dynamic backlash, noise behavior, surface defects.

10. The method according to claim 8 and any one of claims 3 to 5, characterized in that A need for trimming exists if the variation measured from one component to another exceeds predetermined limits for one or more of the following results listed for the single-sided rolling test: concentricity, rolling deviation, concentricity error, tooth-to-tooth amplitude, maximum rolling deviation, transmission error and dynamic backlash, noise behavior, surface defects.

11. The method according to any one of the preceding claims, characterized in that The rolling test includes a bilateral rolling test.

12. The method according to claim 11, characterized in that If one or more of the following results of the double-sided rolling test exceed the respectively assigned predefined limit values, there is a need for correction: center distance, concentricity, rolling runout, rolling deviation, double ball measurement, noise behavior.

13. The method according to claim 11 and any one of claims 3 to 5, characterized in that A need for trimming exists if the variation measured from one component to the other exceeds predetermined limits for one or more of the following listed results for the double-sided rolling test: Axle Spacing, Concentricity, Rolling Runout, Rolling Deflection, Double Ball Measurement, Noise Behavior.

14. The method according to any one of the preceding claims, characterized in that The results of the rolling test carried out with the aid of the evaluation software are checked with the aid of the analysis software, wherein in particular the dressing requirement of the grinding tool is determined with the aid of the analysis software.

15. The method according to any one of the preceding claims, characterized in that The analysis software is used to check whether one or more absolute values ​​of certain quality parameters determined within the scope of the rolling test exceed respectively predetermined limit values ​​and / or whether a variation of one or more quality parameters measured from one component to another exceeds predetermined limit values.

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