Method for grinding a surface of a workpiece and device therefor

Abstract

The invention relates to a method for grinding a surface of a workpiece by means of a grinding machine, which has at least two grinding assemblies, wherein the method has the following steps: a. providing a description of a target structure to be achieved for the surface; b. grinding the surface by means of a first grinding assembly of the at least two grinding assemblies, wherein a predetermined grinding parameter set is used; c. detecting an actual structure of the ground surface; d. comparing the detected actual structure with the target structure; e. adapting a grinding parameter set of a second grinding assembly of the at least two grinding assemblies depending on the comparison; f. grinding the surface by means of the second grinding assembly of the at least two grinding assemblies, wherein the adapted grinding parameter set is used.

Description

Technical Field

[0001] This invention relates to a method for grinding the surface of a workpiece using a grinding machine having at least two grinding assemblies. Furthermore, the invention also relates to an apparatus for carrying out this method. Background Technology

[0002] When surface finishing wood, metal, and special materials such as paper honeycomb, grinding machines are used not only for face grinding but also for edge and profile processing. Here, due to the high demand for highly customized workpieces and items, batch sizes are reduced, resulting in significant variations not only in raw materials but also in the desired final product. Even with large batch sizes and a large quantity of workpieces to be produced, fluctuations occur during the grinding process. These fluctuations are caused by factors such as wear of the grinding media used, differences in the workpiece being ground (e.g., the thickness of the removed layer), dimensional variations, or variations in coating or color, and a range of other parameters.

[0003] To achieve the best possible grinding results for each workpiece, the fluctuations and variations must be studied and the respective grinding processes adapted accordingly. A range of different approaches have been disclosed in the prior art to achieve this, at least in a per-approach manner.

[0004] DE 34 02 104 C2 discloses, for example, a belt grinder in which a pressure beam presses abrasive media onto a workpiece to be ground. The pressure beam is divided into multiple pressure shoes arranged side-by-side, which can be controlled independently and in isolation. In this way, the pressure applied to the workpiece can be adjusted according to its position. The pressure applied by the respective pressure shoes is determined, in particular, by the shape of the workpiece and data on the position and time of the conveying process.

[0005] DE 10 2018 105 133 A1 describes a method for driving a grinding apparatus in which a data detection device is used after grinding to digitally detect the ground surface of a workpiece as much as possible and compare it with a rated value. If the deviation determined in this way is greater than a predetermined limit value, the grinding parameters are changed to achieve the best possible grinding result in the next workpiece. DE 10 2018 202 618 A1 describes a method in which a thermal imaging device is used to detect the ground workpiece. However, its disadvantage is that workpieces manufactured with large deviations are treated as defective products and cannot be sold. DE 10 2010 011 470 B4 discloses a method and apparatus in which a radar sensor is mounted on a tool carrier, which measures the surface of the workpiece during the cutting process.

[0006] Furthermore, existing technology discloses methods for monitoring the wear of grinding media. For example, this method is disclosed in DE 10 2017 208 498A1 or DE 10 2017 106 548 A1. This allows identification of when wear of the grinding media will cause problems in the grinding results. Summary of the Invention

[0007] The objective of this invention is to propose a method for grinding the surface of a workpiece, which can respond quickly and reliably to fluctuations in the grinding results and continuous changes caused by tool wear, thereby reducing the amount of defective products produced, ensuring consistent product quality, and increasing the expected lifespan of the tool.

[0008] The present invention solves the proposed task by means of a method for grinding the surface of a workpiece by means of a grinding machine having at least two grinding assemblies, wherein the method comprises the following steps:

[0009] a. Provide a description of the nominal structure to be achieved on the surface;

[0010] b. The surface is ground using the first of the at least two grinding assemblies, wherein a predetermined set of grinding parameters is used;

[0011] c. Inspect the actual structure of the polished surface;

[0012] d. Compare the detected actual structure with the rated structure;

[0013] e. Adapt the grinding parameter set of the second grinding assembly in the at least two grinding assemblies according to the comparison;

[0014] f. The surface is ground by means of the second of the at least two grinding assemblies, wherein an adapted set of grinding parameters is used.

[0015] In the method of this invention, the surface of the workpiece is polished using the polishing media of at least two polishing assemblies. During this process, i.e., after the first polishing process, in method step b, the actual structure of the polished surface is detected. Based on the result of this comparison, the polishing parameters of the second polishing assembly to be used are determined and adapted. The polished surface is then polished using the second polishing assembly, wherein the adapted set of polishing parameters is used. Ultimately, the second polishing process can respond to the results of the first polishing process and compensate for any deviations, errors, or mistakes that may occur. This cannot be achieved using methods in the prior art. In methods in the prior art, it can only be determined whether the result is satisfactory after polishing. If not, the set of polishing parameters can be adapted for the next or subsequent workpieces, thereby improving the quality. However, the amount of defective products remains unchanged.

[0016] In a preferred configuration, the rated structure to be achieved is the structure that should be achieved after the first grinding. To verify the grinding results after the method is completed, it is advantageous to also determine the rated final structure to be achieved and provide a description of that rated final structure. After grinding the workpiece using all the grinding assemblies to be used, the actual structure can be re-inspected and compared with the rated final structure. Based on this, results important for subsequent workpieces and the grinding parameters to be used in that workpiece can be obtained.

[0017] The description of the nominal structure can exist in different ways. In one configuration, the description exists in the form of at least one digital image. This could be, for example, a digital photograph of the surface shape to be achieved. In a particularly preferred embodiment, it could be a color photograph containing different wavelengths of light. Alternatively, multiple monochrome photographs could be used, each created using only a single wavelength or a narrow wavelength range, such as less than 50 nm, preferably less than 30 nm, or preferably less than 10 nm. Preferably, the description could also be an image in the invisible light range, particularly the near-infrared or UV range.

[0018] Preferably, the grinding machine has more than two grinding assemblies, and the surface is ground by means of more than two grinding assemblies. Preferably, after the first grinding by means of the first grinding assembly, the actual structure of the surface is detected and compared with the corresponding rated structure. Because the surface that has been ground in this way is processed by more than one grinding assembly and thus ground by more than one grinding media, multiple grinding parameter sets can be changed and adapted. The grinding parameters are the grinding parameters of the grinding assemblies that are also used. Here, it is entirely possible and advantageous to obtain multiple adaptation possibilities for different grinding parameter sets. Thus, adaptation schemes for different grinding parameter sets can be selected, for example, those with the minimum load and minimum wear on the grinding media to be used, or those adaptation schemes that minimize the load on the already relatively heavily worn grinding media.

[0019] In a particularly preferred configuration, multiple descriptions of the rated structure to be achieved are provided, which are particularly preferably corresponding to the rated structure to be achieved after a first grinding, a second grinding, and / or another grinding process. After each grinding process (for which a description of the rated structure has been provided), it is also preferred to detect the actual structure and compare it with the corresponding rated structure. Based on this comparison, the grinding parameter set of all grinding assemblies to be used thereafter is preferably adapted. This can result in multiple changes and adaptations of the grinding parameter set of the grinding assembly to be used late in the production process, particularly before the actual use of the grinding assembly, for machining the surface of the workpiece with the corresponding grinding assembly.

[0020] In a preferred configuration, the actual surface structure is detected before each grinding process (in which one of the grinding assemblies is used) and compared with the corresponding rated structure. Based on the result of this comparison, a set of grinding parameters is adapted, which should be used when grinding with the corresponding grinding assembly. Particularly preferred is that the actual surface structure is detected before grinding the surface with the first grinding assembly to be used (advantageously, but not necessarily, the first grinding assembly of the grinding machine). In this way, the first set of grinding parameters to be used (using which the first grinding assembly to be used is operated or configured) can also be individually matched to the condition of the corresponding workpiece. Advantageously, the wear state of at least one grinding medium of at least one of the grinding assemblies is determined, wherein the grinding parameter sets of at least the grinding assembly whose wear state has been determined, and preferably all grinding assemblies to be used subsequently, are adapted according to the determined wear state. In this way, deviations that occur when grinding surfaces with the relevant grinding media can be reduced, because errors caused by wear of the grinding media or corresponding deviations between the grinding results and the rated structure can be addressed in advance.

[0021] Preferably, the description of the nominal structure is a mapping of a reference surface or the reference surface itself. Here, the mapping is a camera mapping or photographic mapping. However, this is not necessary. Measurement data from other sensors, such as thermal imaging sensors, radar sensors, or other types of sensors, can also be used, as long as the description of the surface can be obtained from the measurement data. The choice of measurement data or description for the desired method depends on the properties that the surface to be ground should have after grinding. Typically, the optical appearance of the surface is altered by grinding and should be transformed into the desired appearance. Therefore, a camera mapping of the reference surface is often used as the description of the nominal structure. Here, the nominal structure is two-dimensional or three-dimensional. For example, the grinding pattern to be introduced into the surface generally corresponds to a two-dimensional description of the nominal structure, while a three-dimensional description of the nominal structure is generally advantageous for workpieces with uneven surfaces.

[0022] Preferably, the grinding parameter set includes the feed rate (at which the workpiece is fed through the grinding machine), the grinding media speed (at which the grinding media moves), the pressure at which the grinding media is pressed onto the workpiece, or their spatial and / or temporal distribution. Alternatively or additionally, the grinding parameter set preferably includes the grinding media to be selected in a grinding assembly or the grinding assembly itself to be selected. Alternatively or additionally, this or these selected grinding assemblies and / or the type and / or quantity of the grinding media to be used in said grinding assemblies are preferably determined after or before the pressure process, based on a comparison between the detected actual structure and the rated structure. Alternatively or additionally, the distance or displacement of at least one pressure shoe and / or pressure beam from its rest position to the grinding position is determined. The grinding media is preferably pressed onto the surface to be ground by at least one pressure element. This is known, for example, in grinding belts. For this purpose, a grinding belt is arranged between a corresponding pressure element and the workpiece to be ground, and the pressure element applies pressure to the grinding media in the direction of the workpiece to be ground. In particular, when the grinding media is pressed onto the workpiece by a single pressure element, it is called a pressure beam. The pressure beam preferably extends across the entire width of the abrasive medium. If multiple pressure devices are preferably arranged side-by-side, they are called pressure shoes. If no abrasive medium is used, the pressure element does not apply pressure. Thus, the pressure element is in a stationary position. Preferably, a distance or displacement is measured, which the pressure element must traverse to apply abrasive pressure to the abrasive medium. The pressure element applies pressure in a position called the abrasive position.

[0023] Preferably, at least one set of grinding parameters, and more preferably all sets of grinding parameters, are predetermined and / or adapted based on sensor measurement data, which is derived from:

[0024] - At least one acoustic, vibration and / or force measurement on the pressure shoe and / or pressure beam of at least one grinding assembly;

[0025] - At least one distance measurement on at least one pressure shoe and / or pressure beam;

[0026] - At least one surface measurement and / or at least one thickness measurement of the workpiece;

[0027] - At least one roughness measurement, temperature measurement, and / or slippage measurement of the abrasive media; and / or

[0028] -At least one surface of the abrasive medium is determined by color measurement, capacitance measurement and / or geometric measurement.

[0029] Some of these measurements can be performed before the actual grinding, particularly before the first grinding process. For example, the surface and / or thickness of the workpiece to be ground can be determined before the first grinding process. This is preferably done at the inlet of the grinding machine. The roughness, temperature, and / or slippage of at least one grinding medium can be measured continuously, but preferably at least repeatedly. Here, regular repetition is advantageous, regardless of whether, when, or with what frequency the grinding medium used for grinding the workpiece is used.

[0030] The same applies to measurements of the surface of the grinding media, from which the wear condition can be determined. Measurements performed on one or more pressure shoes or beams of at least one grinding assembly are preferably performed during the grinding process. They are preferably performed multiple times during the grinding of a single workpiece. Of course, it is also possible to perform measurements on the pressure shoes or beams only once per workpiece. Advantageously, the measurement results are used to adapt as many sets of grinding parameters as possible to the grinding assembly used when grinding the workpiece to be processed.

[0031] The same applies to measurements of the surface of the grinding media, from which the wear condition can be determined. Measurements performed on one or more pressure shoes or beams of at least one grinding assembly are preferably performed during the grinding process. They are preferably performed multiple times during the grinding of a single workpiece. Of course, it is also possible to perform measurements on the pressure shoes or beams only once per workpiece. Advantageously, the measurement results are used to adapt as many sets of grinding parameters as possible to the grinding assembly used when grinding the workpiece to be processed.

[0032] Advantageously, the grinding machine has more grinding assemblies than is used during grinding. In other words, the surface of the workpiece is not ground by all the grinding assemblies of the grinding machine. Here, the grinding assemblies to be used or to be used are selected considering the wear state of the grinding media in all the grinding assemblies. For example, it is preferable to use grinding media or grinding assemblies with minimal wear to achieve the most uniform load and wear as possible on all the grinding media in the grinding assembly. Alternatively, for example, grinding media that are already particularly worn can be selected so that the grinding media can be replaced in the shortest possible time or immediately, provided that there happens to be an advantageous time point for this. This is advantageous if, for example, the replacement of grinding media at the time of user change of the grinding machine is ignored. This allows the time point to be moved forward so that it does not fall into an unfavorable time range. Therefore, by selecting the grinding assemblies to be used or to be used, in particular the replacement time point of individual grinding media can be changed and the time point of more or less frequent use of grinding media can be moved forward or backward.

[0033] In a particularly preferred configuration, the position of the workpiece relative to at least one grinding media of at least one grinding assembly is adapted, taking into account the wear state of the grinding media. This is particularly advantageous when a single area of ​​one grinding media exhibits more wear than other areas. A belt grinder with a grinding belt (which moves, for example, parallel to the feed direction) can be an example of such uneven wear. If, for example, multiple workpieces are being ground, arranged on the left edge of the conveyor that transports the workpieces through the grinder, the wear of the grinding belt is greater in the left area than in the right area. Therefore, it is advantageous to adapt the position of the workpiece on the conveyor and thus relative to the grinding belt and grinding assembly, taking into account the wear state, to prevent the grinding media from having to be replaced even though one spatial area of ​​the grinding media has sufficient abrasive effect for the grinding process.

[0034] Preferably, if the detected actual structure is identified as unachievable when comparing it with the rated structure, or if at least one parameter of the adapted grinding parameter set is outside a predetermined value range, the workpiece is rejected as a defective product, wherein, preferably, the feed rate is increased. If the deviation between the detected actual structure and the rated structure is so large that the rated structure cannot be achieved in another grinding assembly, the workpiece is rejected as a defective product in this configuration of the method. Alternatively or additionally, the above also occurs if, although the rated structure cannot yet be achieved, all subsequent grinding assemblies or the grinding parameters required for this subsequent grinding assembly contain at least one parameter outside a predetermined value range. This could be, for example, a parameter that, while feasible, would damage the grinding assembly and / or grinding media, for example, or subject them to disproportionate wear. Particularly preferred is that when a workpiece should be rejected as a defective product, the feed rate (at which the workpiece is fed through the grinding machine) is increased.

[0035] Furthermore, the present invention solves the proposed task by a grinding machine for implementing the method according to any one of the foregoing configurations. This grinding machine preferably has an electronic or electrical control device, particularly an electronic data processing device, configured to compare the detected actual structure with a description of the rated structure preferably stored in an electronic data memory, and based on the result of this comparison, to control the grinding assembly to be used subsequently, such that a modified or adapted set of grinding parameters is used. Preferably, the electronic data processing device has a comparison module for this purpose, which performs the actual comparison. A calibration module determines the adaptation to be implemented for the grinding parameters from the result of the comparison. Preferably, the adapted set of grinding parameters, or at least the adaptation or modification to be implemented relative to the previous set of grinding parameters, is transmitted to the corresponding grinding instrument by means of a matching module. The various modules described herein can also be configured as software and programs for the electronic data processing device. If the grinding machine also has at least one sensor to obtain the sensor measurement data described herein, it is advantageous that the calibration module can recall this sensor measurement data and incorporate it into the determination of the adaptation to be implemented. Attached Figure Description

[0036] Some embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In the drawings:

[0037] Figure 1 A schematic diagram of a grinding machine according to an embodiment of the present invention is shown.

[0038] Figure 2 A flowchart illustrating a method according to another embodiment of the present invention is shown. Detailed Implementation

[0039] Figure 1A grinding machine according to an embodiment of the present invention is schematically shown. The grinding machine has three grinding assemblies 2, each having a grinding media 4, and in the illustrated embodiment, each having a grinding belt. The workpiece to be ground ( Figure 1 (Not shown) These grinding media 4 are conveyed through the mill via conveyor belt 6 in the direction indicated by arrow 8. Each of these grinding media 4 is conveyed by means of a separate pressure element 10 (which in...) Figure 1 The structure (in the middle) is a pressure beam that presses down on the workpiece to be ground. Various sensors are present to receive or acquire different measurements and measure different parameters.

[0040] exist Figure 1 The grinding machine shown has three surface sensors 12, which are configured to detect the actual structure of the workpiece surface. These surface sensors 12 can be configured as cameras, 3D scanners, or other sensors in the visible or invisible wavelength range. A terminal sensor 14, also configured as a surface sensor, is located along the feed direction after the last grinding unit and detects the completed grinding result, i.e., the actual structure after the last grinding process.

[0041] In addition, Figure 1 Additional measuring sensors 16 are shown, arranged within a single grinding unit 2. They exemplarily represent different sensor types that can be used to receive or acquire measurements, based on which a suitable set of grinding parameters can be determined or adapted. Figure 1 In the illustrated embodiment, the measuring sensor 16 is configured to determine the pressure element 10 from its rest position ( Figure 1 The distance from the grinding position is shown in the diagram. Signals received or acquired by sensors 12, 14, and 16 are transmitted to the electronic data processing device 20 via signal line 18. The signal lines 18 of sensors 12, 14, and 16 in the last grinding unit 2 are shown in dashed lines to indicate that these sensors 12, 14, and 16 are optional and may not be used to determine the adapted grinding parameter set. The electronic data processing device 20 has an input module 22 by means of which the user of the grinding machine can intervene in the control, input new parameters, or otherwise operate the machine.

[0042] Figure 2The diagram schematically illustrates the flow of a method according to an embodiment of the present invention. After initiation 24, the method is initiated by means of workpiece identification 26, which identifies and first stores parameters of the workpiece to be ground, particularly its width and / or thickness. These parameters and data of the workpiece are used to achieve a uniform load on the grinding media 4 in an electronic data processing device 20. This is implemented in a load module 28 of the electronic data processing device, to which the data and parameters are transmitted. This module can also be configured as a computer program product, such as software. In a next method step, surface data describing the nominal structure is provided from a data storage 30. This data can exist in a two-dimensional or three-dimensional manner and is transmitted to a nominal structure module 32, which provides a machine-readable description of the nominal structure.

[0043] In the next step, the actual structure 34 is detected and then compared with the rated structure in the comparison module 36 of the electronic data processing device 20. If the comparison results in the need to determine an adapted set of grinding parameters, this information is transmitted to the adaptation module 38, where a new adapted set of grinding parameters is determined. In the next method step, referred to as grinding 40, the surface of the workpiece is ground using the adapted set of grinding parameters.

[0044] If the comparison results in no need to determine the adapted grinding parameter set, the comparison module 36 preferably transmits the information directly to the next grinding unit or electronic data processing device and performs grinding 40 directly after the comparison.

[0045] The polished surface then undergoes actual structure testing 34, the results of which are compared again with the rated structure in comparison module 36. Subsequently, if necessary, the adapted set of polishing parameters is determined in adaptation module 38. Alternatively, polishing 40 can be performed again without adapted polishing parameters. The same module can be used multiple times as comparison module 36. Alternatively, different modules can be used as comparison module 36. This is particularly advantageous if different measurements and / or different parameters are used to employ the actual structure and / or the corresponding rated structure. The same applies to adaptation module 38.

[0046] exist Figure 2 In the illustrated process flow, after the last grinding 40, the actual structure 34 is re-inspected and compared with the rated structure in the comparison module 36. This allows for evaluation of the grinding quality and, for example, identification of defective products. In the display step 42, the load and / or degree of grinding of the corresponding grinding media 4 are displayed to the user of the grinder. This is preferably given as position-related information, preferably based on the grinding width and / or position relative to the width of the grinding media.

[0047] In the final quality control step 44, a final comparison between the actual structure and the rated structure is used to evaluate whether the workpiece is defective. If not, the workpiece is sent to another process 46, such as packaging. Then, the method ends 48.

[0048] All of the above modules are preferably part of an electronic data processing device and are configured as software, i.e., computer program products.

[0049] List of reference numerals

[0050] 2 Grinding Assembly

[0051] 4 Grinding media

[0052] 6 Conveyor Belt

[0053] 8 arrows

[0054] 10 Pressure Components

[0055] 12 Surface Sensors

[0056] 14 Terminal Sensors

[0057] 16 Measurement Sensors

[0058] 18 Signal lines

[0059] 20 Electronic data processing devices

[0060] 22 Input Module

[0061] 24 Startup

[0062] 26. Workpiece Recognition

[0063] 28 Load Module

[0064] 30 Data Storage

[0065] 32 Rated structural modules

[0066] 34. Actual Structure Identification

[0067] 36 Comparison Module

[0068] 38 Adaptor Modules

[0069] 40 Grinding

[0070] 42 Show steps

[0071] 44 Quality Control

[0072] 46. ​​Other treatment

[0073] 48. End.

Claims

1. A method for grinding the surface of a workpiece by means of a grinding machine, the grinding machine having at least two grinding assemblies (2), wherein, The method comprises the following steps: a. Provide a description of the nominal structure to be implemented on the surface; b. The surface is ground by means of the first grinding assembly of the at least two grinding assemblies (2), wherein a predetermined set of grinding parameters is used; c. Inspect the actual structure of the polished surface; d. Compare the detected actual structure with the rated structure; e. Adapt the grinding parameter set of the second grinding assembly of the at least two grinding assemblies to the comparison; f. The surface (40) is ground using the second of the at least two grinding assemblies, wherein an adapted set of grinding parameters is used. Its features are, Before each grinding, the actual structure of the surface is detected and compared with the rated structure by means of one of the grinding assemblies (2), and the set of grinding parameters to be used during grinding is adapted according to the result of the comparison.

2. The method according to claim 1, characterized in that, The grinding machine has more than two grinding assemblies and the surface is ground by means of more than two grinding assemblies.

3. The method according to claim 1 or 2, characterized in that, Determine the wear state of at least one abrasive medium (4) of at least one abrasive assembly in the abrasive assembly (2) and adapt at least one set of abrasive parameters of the abrasive assembly according to the determined wear state.

4. The method according to claim 1 or 2, characterized in that, The description of the rated structure is a mapping of the reference surface or the reference surface itself.

5. The method according to claim 1 or 2, characterized in that, The rated structure is two-dimensional or three-dimensional.

6. The method according to claim 1 or 2, characterized in that, The grinding parameter set includes feed rate, grinding media velocity, pressure that presses the grinding media onto the workpiece, or its spatial and / or temporal distribution and / or the distance from at least one pressure shoe and / or pressure beam from the rest position to the grinding position.

7. The method according to claim 1 or 2, characterized in that, At least one set of grinding parameters is predetermined and / or adapted based on sensor measurement data from: - At least one acoustic measurement, vibration measurement and / or force measurement on the pressure shoe and / or pressure beam of at least one grinding assembly (2); - At least one distance measurement on at least one pressure shoe and / or pressure beam; - At least one surface measurement and / or at least one thickness measurement of the workpiece; - Roughness measurement, temperature measurement and / or slippage measurement of at least one abrasive media; - and / or at least one surface color measurement, capacitance measurement and / or geometric measurement of the abrasive media. The conclusion is as follows.

8. The method according to claim 1 or 2, characterized in that, The surface is not ground by means of all the grinding assemblies of the grinding machine and the grinding assembly used is selected in consideration of the wear condition of the grinding media of all the grinding assemblies (2).

9. The method according to claim 1 or 2, characterized in that, The position of the workpiece relative to at least one grinding media of at least one grinding assembly is adapted, taking into account the wear condition of the grinding media.

10. The method according to claim 1 or 2, characterized in that, If the actual structure detected cannot achieve the rated structure when compared with the rated structure, or if at least one parameter of the adapted grinding parameter set is outside the predetermined value range, the workpiece is rejected as a defective product.

11. The method according to claim 1 or 2, characterized in that, Determine the wear state of at least one grinding medium (4) of at least one grinding assembly in the grinding assembly (2) and adapt the grinding parameter set of all grinding assemblies to be used thereafter based on the determined wear state.

12. The method according to claim 1 or 2, characterized in that, All grinding parameter sets are predetermined and / or adapted based on sensor measurement data, which is derived from: - At least one acoustic measurement, vibration measurement and / or force measurement on the pressure shoe and / or pressure beam of at least one grinding assembly (2); - At least one distance measurement on at least one pressure shoe and / or pressure beam; - At least one surface measurement and / or at least one thickness measurement of the workpiece; - Roughness measurement, temperature measurement and / or slippage measurement of at least one abrasive media; - and / or at least one surface color measurement, capacitance measurement and / or geometric measurement of the abrasive media. The conclusion is as follows.

13. The method according to claim 1 or 2, characterized in that, If the actual structure detected is found to be unable to achieve the rated structure when compared with the rated structure, or if at least one parameter of the adapted grinding parameter set is outside the predetermined value range, the workpiece is rejected as a defective product, wherein the feed rate is increased.

14. A grinding machine for carrying out the method according to any one of claims 1 to 13, wherein the grinding machine has an electronic or electrical control device configured to compare the detected actual structure with a description of the rated structure and, based on the result of the comparison, control the grinding assembly (2) to be used thereafter so as to use a modified or adapted set of grinding parameters.

15. The grinding machine according to claim 14, characterized in that, The electronic or electrical control device is an electronic data processing device (20).

16. The grinding machine according to claim 14, characterized in that, The description is stored in an electronic data storage device (30).

Images