EP3597362B1 - Compression spring grinding machine - Google Patents

Description

The invention relates to a spring-end grinder according to the features of claim 1 and a method for controlling a spring-end grinder according to the features of claim 15.

Spring end grinding machines are well known from the prior art.

Out of EP 0 722 810 A1 discloses a spring end grinder with two rotatable loading plates and two grinding wheels, the axes of rotation of which are parallel to the axes of rotation of the loading plates. It is also described that the distance between the grinding wheels is changed for successive work steps up to the end of the grinding process.

For example, it will refer to the EP 2 926 949 referred. The grinding process for grinding down spring ends requires a high level of know-how, in particular to prevent the springs from getting too hot in the grinding process. Excessive heat generation during the grinding process also damages the grinding wheels and other components of the spring end grinding machine, in particular a sliding plate used to transfer a loading plate. The aforementioned prior art also proposes an improved flow of cooling air in this regard.

In general, however, there is a desire to be able to more precisely control or monitor the process of grinding down spring ends within a spring end grinding machine.

To solve this object, the present invention proposes a spring end grinder having the features of claim 1, a system for controlling a spring end grinder according to claim 12; and a method for controlling a spring end grinding machine according to the features of claim 15 and a computer-readable storage medium according to claim 17. Advantageous developments are specified in the dependent claims.

• mindestens einen um eine Drehachse drehbar gelagerten Ladeteller zur Bestückung mit Werkstücken, insbesondere Schraubenfedern;
• eine Schleifeinheit mit mindestens einer um eine Drehachse drehbar gelagerten Schleifscheibe,
  wobei die Drehachse der Schleifscheibe im Wesentlichen parallel zur Drehachse des Ladetellers ist;
• mindestens einen Sensor zur Erfassung von Schleifscheibeninformationen, insbesondere einer Temperatur und/oder eines Abriebmaßes der Schleifscheibe, wobei der Sensor in die Schleifscheibe integriert, insbesondere in der Schleifscheibe aufgenommen, ist;
• eine Verarbeitungseinheit, die dazu ausgebildet ist, basierend auf an die Verarbeitungseinheit übertragenen Schleifscheibeninformationen einen Steuerbefehl zur Steuerung der Federendenschleifmaschine auszugeben;
• eine Übertragungseinrichtung zur Übertragung von
  Schleifscheibeninformationen von dem Sensor an die Verarbeitungseinheit, wobei die Übertragungseinrichtung (50) zur drahtlosen bidirektionalen Datenkommunikation zwischen der Schleifscheibe (13) und der Verarbeitungseinheit (40) ausgebildet ist.

According to a core idea of the present invention, a spring end grinding machine is proposed, comprising:

• at least one loading plate, mounted rotatably about an axis of rotation, for loading with workpieces, in particular coil springs;
• a grinding unit with at least one grinding wheel mounted so that it can rotate about an axis of rotation,
  wherein the axis of rotation of the grinding wheel is substantially parallel to the axis of rotation of the loading plate;
• at least one sensor for detecting grinding wheel information, in particular a temperature and/or a degree of abrasion of the grinding wheel, the sensor being integrated into the grinding wheel, in particular accommodated in the grinding wheel;
• a processing unit configured to output a control command for controlling the spring end grinding machine based on grinding wheel information transmitted to the processing unit;
• a transmission device for the transmission of
  Grinding wheel information from the sensor to the processing unit, the transmission device (50) being designed for wireless bidirectional data communication between the grinding wheel (13) and the processing unit (40).

Providing a sensor that is integrated in the grinding wheel makes it possible to monitor the grinding process even more precisely with regard to certain parameters, such as temperature and/or abrasion of the grinding wheel, and advantageously via the information obtained in this way For example, to have a direct effect on the grinding process itself, to store this information for the documentation of the grinding process or to provide this information for storage in a knowledge database and/or to take it into account in future grinding processes or to use it to improve a conventional spring end grinding machine, in particular a spring end grinding machine or to improvement of a conventional grinding wheel.

The sensor integrated in the grinding wheel can in particular be permanently connected to the grinding wheel, for example to the grinding body or the grinding layer. In any case, the sensor rotates with the grinding wheel and can also be designed to be partially integrated into the grinding layer.

Grinding wheel information can relate to the grinding wheel (grinding wheel parameters), the workpieces (workpiece parameters) and/or the grinding process (grinding process parameters). Stored data containing grinding wheel information may be referred to as grinding wheel data. Stored grinding process data contain, in particular, grinding process parameters, while stored workpiece data contain, in particular, workpiece parameters.

The transmission between the sensor and the processing unit, which can also be referred to as a data processing unit, takes place wirelessly and to this extent not wired. In the latter case, at least two preferably electrical lines would be routed via a rotating or sliding contact over the shaft of the grinding wheel. The at least two electrical lines can both take over the power supply and be used modulated for the data exchange. However, it is also possible for the sensor to work via a self-sufficient power supply or for the power supply to be provided inductively according to the principle of a generator by the rotation of the grinding wheel. However, the signal transmission between the sensor and the processing unit preferably takes place wirelessly, so that a one-way or bidirectional wireless communication is created between the sensor and the processing unit. If the transmitted grinding wheel information is used to generate or to generate a control command for controlling the spring end grinding machine during the ongoing process influence, this control command can readjust or feed the grinding wheel or wheels, switch a flow of cooling liquid or a flow of cooling air on or off, increase or reduce the number of revolutions of the grinding wheels, move/move the loading plate (feed grinding), make an adjustment the speed of rotation of the loading plate (continuous grinding); adjustment of the tilting angle of the grinding wheels (through-feed grinding) or any other change in the grinding process.

In a preferred development, it is provided that the grinding wheel information includes a characteristic value for the type of grinding wheel. In particular, an assignment of grinding wheel parameters that are specific to the grinding wheel in question is made possible via the characteristic value. Alternatively or additionally, the grinding wheel information can also contain grinding wheel parameters that are specific to the respective grinding wheel. For example, the type of grinding wheel, the date of manufacture, a maximum usage date, a maximum abrasion, dimensions, a material and/or service life of the grinding wheel and/or other specific information or grinding wheel parameters can be contained in the grinding wheel information. These specific grinding wheel parameters can be stored in the processing unit or called up via the processing unit. In this respect, the grinding wheel can, for example, comprise an RFID transponder, in which the characteristic value for the type of grinding wheel is encoded.

In a preferred embodiment, a sensor is designed as a thermocouple and/or a sensor is designed as an infrared sensor. More preferably, at least one pair of electrodes of the thermocouple or a light guide can be aligned in the essentially axial direction of the grinding wheel, in particular accommodated in this alignment in the grinding wheel body. Provision can be made for the electrodes to extend as far as the grinding surface and in this respect the electrodes also experience a physical change as a result of abrasion of the grinding layer, so that, for example, the resistance value that can be detected in this respect changes. In the case of a thermocouple, the pair of electrodes are made of different materials. The electrodes of the thermocouple can be connected to an oscillating circuit, in particular due to a detected resonance signal of the oscillating circuit, an abrasion of the Grinding wheel can be determined. In particular, the oscillating circuit can be integrated into evaluation electronics of the sensor. The length of the electrodes (which wear down over the grinding period) particularly influences the oscillation behavior or resonance behavior of the oscillating circuit, which means that conclusions can be drawn about the (previous) abrasion of the grinding wheel. In particular, the thermal radiation can be transmitted to a detection unit of the sensor by means of a light guide.

In one possible configuration, a sensor can include a piezoelectric element and can be designed in particular as an ultrasonic sensor. A signal correlating with the abrasion can be determined with an ultrasonic sensor.

Furthermore, the sensor can also be designed as a speed sensor or comprise a speed sensor. In this case, the speed sensor can be designed, for example, as an acceleration sensor and/or as a Hall sensor for detecting the number of revolutions of the grinding wheel. In particular, the accumulated number of revolutions of the grinding wheel can be regarded as a measure of the probable wear of the grinding wheel.

Furthermore, the sensor can also detect an imbalance in the grinding wheel and in this respect can be designed as an acceleration sensor, for example. Such an imbalance sensor can be integrated in the grinding wheel and/or in the spring-end grinding machine. The data recorded or derived from this can be created in the grinding wheel or the spring-end grinding machine or passed on externally, for example to an external server.

In a preferred development, the grinding wheel can also have an evaluation unit that is designed to process sensor signals generated by the sensor that contain grinding wheel information, the evaluation unit being integrated in particular in a grinding wheel holder, preferably in the grinding wheel flange.

The evaluation unit includes, for example, evaluation electronics and can include an integrated circuit and/or a computing unit, preferably a microcontroller. If the signals generated by the sensor or sensors are provided in analog form, the evaluation unit can also have an analog-to-digital converter include. In this respect, the data provided by the sensor or sensors can be processed via the evaluation unit, and this processed data can be transmitted to the processing unit in particular via the transmission device. However, it is also possible to provide a memory unit for storing grinding wheel data in the grinding wheel, in which grinding wheel information is stored. Prepared grinding wheel information is preferably stored in this memory unit, so that this memory unit can also interact with the evaluation unit described above.

Furthermore, a data transmission interface can expediently be provided for reading out recorded grinding wheel data, in particular grinding wheel data records which describe the temporal progression of grinding wheel information. Such grinding wheel data can include, for example, grinding wheel information about the previous operating time, grinding processes (programs) that have been carried out or planned, recorded temperature profiles, abrasion profiles or the like.

Provision can also be made for the processing unit to interact with a storage unit for storing grinding wheel data containing grinding wheel information, and also with a computing unit which is designed to work based on actual grinding wheel data and target grinding wheel data stored in the storage unit, in particular stored grinding process parameters and/or workpiece parameters to calculate a control command for the spring end grinding machine. This memory unit can be integrated in the grinding wheel itself or on the spring-end grinding machine, or it can be provided entirely externally. It is also possible to store grinding wheel data in several storage locations or to carry out the storage selectively, depending on the type of grinding wheel data.

As already mentioned, grinding wheel data can also include workpiece parameters (material, dimensions), in particular the material and dimensions of the springs, as well as the respective grinding process parameters (contact pressure, limit temperatures, grinding times, chronological progression of these parameters), so that the computing unit can, for example, use historical data for a current Grinding process suitable control commands generated and / or from current Grinding process parameters using the sensor data from the grinding wheel are used to calculate suitable control commands for the spring-end grinding machine, or these data are correlated and stored in the memory unit or units.

In a preferred embodiment, the transmission device comprises a transmitting unit connected to the sensor or sensors or the evaluation unit, in particular arranged in the grinding unit or the grinding wheel, and a receiving unit connected to the processing unit for contactless transmission of grinding wheel information.

In order to enable bidirectional data transmission as well, it is preferably provided that the processing unit also interacts with a transmission unit that can transmit information to a reception unit that is integrated in the grinding unit or in the grinding wheel. The wireless signal transmission can be based on analog signals. However, digital signals can also be transmitted, for example according to the WLAN standard, the Bluetooth standard or a mobile radio standard.

In a specific embodiment, it can be provided that the transmission device is designed to wirelessly transmit sensor signals detected by the sensor, which contain grinding wheel information, inductively, capacitively or in another suitable way to the processing unit, with the transmitter unit and receiver unit being in particular connected to the axis of rotation of the grinding wheel coaxial induction coils are formed.

Finally, a system for controlling a spring-end grinding machine is also claimed, the system having a spring-end grinding machine according to the present invention, a server having a memory unit for storing grinding wheel data containing grinding wheel information, at least one grinding machine communication device for communication between the spring-end grinding machine and the server , in particular via a wireless network connection and/or a server communication device for communication between the server and the spring-end grinding machine, in particular via a wireless network connection. A network connection can be provided here, for example, by a cellular network or a LAN network or a WLAN network.

In a preferred embodiment, the system for controlling the grinding machine provides that the server communication device receives actual grinding wheel data from the grinding machine communication device or is designed to receive this data, with the server having a computing unit that is designed to do so, based on actual grinding wheel data received and target grinding wheel data stored on the server, in particular stored grinding process parameters and/or workpiece parameters, to calculate a control command for the spring-end grinding machine, with the server communication device being designed to send the control command to the grinding machine communication device. In this respect, the calculation of a control command includes the comparison of the received actual grinding wheel data with the stored target grinding wheel data. The grinding process parameters can include, for example, the limit temperature for the spring ends and other grinding process parameters. Workpiece parameters can include, for example, dimensions, material, wire gauge, or an identification number of the workpiece to be ground.

In a preferred embodiment, the system for controlling the grinding machine can also provide for a grinding machine communication device to be arranged in or on the grinding unit, in particular in or on the grinding wheel, and connected to the sensor and/or a grinding machine communication device to be connected to the processing unit. A grinder communication device connected to the processing unit (wired) can be integrated into a control module of the spring-end grinder or arranged in a control cabinet of the spring-end grinder, i.e. in particular stationary relative to the (rotating) grinding wheel.

• Erfassen von Schleifscheibeninformationen durch mindestens einen Sensor, wobei der Sensor in die Schleifscheibe integriert, insbesondere in der Schleifscheibe aufgenommen, ist;
• Übertragen von Schleifscheibeninformationen von dem Sensor an eine Verarbeitungseinheit der Federendenschleifmaschine durch eine Übertragungseinrichtung;
• Ausgeben eines Steuerbefehls zur Steuerung der Federendenschleifmaschine durch die Verarbeitungseinheit, basierend auf an die Verarbeitungseinheit übertragenen Schleifscheibeninformationen,

wobei die Schleifscheibeninformationen mindestens eine der folgenden Schleifscheibeninformationen enthalten:

• eine Temperatur der Schleifscheibe,
• ein Abriebmaß der Schleifscheibe,
• eine Unwuchtinformation, aus der sich Aufschlüsse über das Ausmaß einer Unwucht der Schleifscheibe ergeben,
• eine Kennung des Typs der Schleifscheibe,
• eine Drehzahl der Schleifscheibe, insbesondere bisherige Umdrehungen der Schleifscheibe im Betrieb,
• eine Betriebszeit oder Lebensdauer, insbesondere verbleibende Lebensdauer, der Schleifscheibe,
• eine Schleifkraft, insbesondere Anpresskraft, der Schleifscheibe.

The method according to the invention for controlling a spring end grinding machine comprises the following steps:

• Detection of grinding wheel information by at least one sensor, the sensor being integrated into the grinding wheel, in particular accommodated in the grinding wheel;
• transmitting grinding wheel information from the sensor to a processing unit of the spring end grinding machine through a transmission device;
• the processing unit issuing a control command for controlling the spring-end grinding machine, based on grinding wheel information transmitted to the processing unit,

wherein the grinding wheel information includes at least one of the following grinding wheel information:

• a temperature of the grinding wheel,
• an abrasion measure of the grinding wheel,
• an imbalance information that provides information about the extent of an imbalance in the grinding wheel,
• an identifier of the type of grinding wheel,
• a speed of the grinding wheel, in particular previous revolutions of the grinding wheel in operation,
• an operating time or service life, in particular remaining service life, of the grinding wheel,
• a grinding force, in particular contact pressure, of the grinding wheel.

• Erfassen von Schleifscheibeninformationen durch mindestens einen Sensor, wobei der Sensor in die Schleifscheibe integriert, insbesondere in der Schleifscheibe aufgenommen ist;
• Übertragen von Schleifscheibeninformationen von dem mindestens einen Sensor an eine Verarbeitungseinheit der Federendenschleifmaschine durch eine Übertragungseinrichtung,
• Ablegen der Schleifscheibeninformationen in einer Speichereinheit Zurverfügungstellung für nachfolgende Auswertungen,

wobei die Schleifscheibeninformationen mindestens eine der folgenden Schleifscheibeninformationen enthalten:

• eine Temperatur der Schleifscheibe,
• ein Abriebmaß der Schleifscheibe,
• eine Unwuchtinformation, aus der sich Aufschlüsse über das Ausmaß einer Unwucht der Schleifscheibe ergeben,
• eine Kennung des Typs der Schleifscheibe,
• eine Drehzahl der Schleifscheibe, insbesondere bisherige Umdrehungen der Schleifscheibe im Betrieb,
• eine Betriebszeit oder Lebensdauer, insbesondere verbleibende Lebensdauer, der Schleifscheibe,
• eine Schleifkraft, insbesondere Anpresskraft, der Schleifscheibe.

A method is also proposed for evaluating process information from a grinding process in a spring-end grinding machine, the method comprising the following steps in particular:

• Detection of grinding wheel information by at least one sensor, the sensor being integrated into the grinding wheel, in particular being accommodated in the grinding wheel;
• transmitting grinding wheel information from the at least one sensor to a processing unit of the spring-end grinding machine by a transmission device,
• Storing the grinding wheel information in a storage unit making it available for subsequent evaluations,

wherein the grinding wheel information includes at least one of the following grinding wheel information:

• a temperature of the grinding wheel,
• an abrasion measure of the grinding wheel,
• an imbalance information that provides information about the extent of an imbalance in the grinding wheel,
• an identifier of the type of grinding wheel,
• a speed of the grinding wheel, in particular previous revolutions of the grinding wheel in operation,
• an operating time or service life, in particular remaining service life, of the grinding wheel,
• a grinding force, in particular contact pressure, of the grinding wheel.

In addition, the object is achieved in particular by a computer-readable storage medium which contains instructions which cause at least one processor to implement a method according to the invention when the instructions are executed by the processor of the server or the spring-end grinding machine. A computer-readable storage medium can be, for example, a mobile data carrier or a hard disk, which can be arranged in the spring-end grinding machine or an (external) server.

Fig. 1

ein schematisches Schaubild zur Erläuterung der Wirkzusammenhänge bei einer erfindungsgemäßen Federendenschleifmaschine;

Fig. 2

die Federendenschleifmaschine nach Fig. 1 in schematischer Ansicht in Draufsicht.

The invention is explained in more detail below, also with regard to further features and advantages, on the basis of the description of exemplary embodiments and with reference to the accompanying drawings. Here show:

1

a schematic diagram to explain the functional relationships in a spring end grinding machine according to the invention;

2

the spring end grinding machine 1 in schematic view in top view.

The implementation of the present invention is illustrated below in a specific exemplary embodiment, namely in a specific spring-end grinding machine. As is known per se from the prior art, the spring end grinding machine 1 has two or more loading plates 10 formed on each of which a plurality of workpiece receiving openings 15 are formed in order to be able to hold coil springs 3 therein. The loading plates 10 are eccentrically rotatable about the axis of rotation A on a turntable 17 in such a way that a loading plate 10 can introduce the springs via a sliding plate 16 between two spatially spaced sanding plates 13 . The turntable 17 rotates about the axis of rotation C. As is well known from the prior art, the grinding wheels 13 grind the ends of the helical springs plane, in particular plane-parallel, so that the helical springs are each provided with plane-parallel ends. During operation, the grinding wheels rotate around the common axis of rotation B (infeed grinding) or around axes of rotation B that are slightly tilted relative to one another (throughfeed grinding). The spring end grinding machine 1 is constructed essentially symmetrically to the axis M of symmetry.

At least one of the grinding wheels 13, preferably both grinding wheels, are designed according to the invention with at least one sensor 30 integrated therein. One or more sensors 30 can be installed in the upper grinding wheel 13 (as in 1 and 2 shown) and / or in the lower grinding wheel 13 may be provided. In the present embodiment, the sensor 30 detects both a temperature of the grinding wheel 13 on its grinding surface 131 facing the helical springs 3 and the respective abrasion of the grinding wheel 13. However, separate sensors 30 can also be provided, which each provide grinding wheel information, e.g. a temperature or , a measure of wear. The temperature of the grinding wheel 13 can be detected, for example, using a thermocouple. The abrasion can also be detected via a resistance value of a conductor in the region of the sliding surface 131 that is also detected by the abrasion. The measured values of the sensor(s) 30 are then fed to an evaluation unit 31 provided in the grinding wheel 13 and fed to a transmission unit 51 via a data management unit 43 integrated in the grinding wheel 13 . The transmission unit 51 sends the grinding wheel data obtained via a wireless connection 53 to a receiving unit 52 which, in the present embodiment, is arranged on the stationary part of the spring-end grinding machine 1 (ie outside the rotating grinding unit 11). The transmitting unit 51 integrated in the grinding wheel 13 and the receiving unit 52 implemented on the spring-end grinding machine 1 are components of a transmission device 50 which enables wireless communication via a wireless connection 53 between the grinding wheel 13 and Spring end grinding machine 1 allows. The wireless communication can be unidirectional from the grinding wheel 13 to the spring end grinding machine 1 . However, the communication is preferably bidirectional, so that data can also be transmitted from the spring-end grinding machine 1 to the grinding wheel 13 .

A memory unit 14 is preferably also implemented in the grinding wheel 13 . Not only the data recorded by the sensor(s) 30 can be stored in the memory unit 14 but also associated process parameters, which are transmitted back from the spring-end grinding machine 1 to the grinding wheel 13 via the transmission device 50 . In this respect, data that is or was recorded by the spring-end grinding machine can also be transmitted back to the grinding wheel 13, in particular information about the drive forces, speed values, imbalance values recorded in the spring-end grinding machine, etc. In this respect, the entire history of various grinding processes can be stored in the grinding wheel 13 , in which the grinding wheel 13 was used, including the coil springs processed in each case, the process parameters, including temperature profiles of grinding speeds, number of revolutions, number of treated springs, etc. The data stored in the grinding wheel 13 enable precise documentation of the Grinding wheel carried out grinding work, from which insights into the further development of grinding wheels and / or spring end grinders can be drawn.

However, the data recorded by the sensor 30 integrated in the grinding wheel 13 can also be used to directly influence control commands for the respective grinding process. For this purpose, the grinding wheel information received at the receiving unit 52 of the spring-end grinding machine 1 is forwarded to a processing unit of the spring-end grinding machine. In the present embodiment, the processing unit 40 of the spring-end grinding machine 1 is directly integrated into it. However, the processing unit 40 can also be provided externally. The processing unit 40 includes, on the one hand, a storage unit 41 and, on the other hand, a computing unit 42 in order to calculate control commands for a specific grinding process. The control commands for a specific grinding process also depend on the ones detected via the sensor 30 or the sensors 30 Grinding wheel data, in particular the temperature at the spring ends or on the grinding surface 131 and the current abrasion.

Finally, a system 100 with one or more spring-end grinding machines 1 and a server 2 spatially separate from a spring-end grinding machine 1 can be provided, on the data of the spring-end grinding machine 1, comprising data from the sensor 30 integrated in the grinding wheel 13 or from the sensor 30 integrated in the grinding wheel 13 Sensors 30 are supplied. For this purpose, the server 2 comprises a server communication device 21 which is in a wireless connection 23 with a grinding machine communication device 12 which is implemented on the spring-end grinding machine. The wireless connection 23 includes a bidirectional data communication, which can take place in particular on the basis of a mobile radio standard or a WLAN standard. In the present case, the spring-end grinding machine 1 has a wireless connection 23 to a server 2 via a WLAN or mobile network. The communication is bidirectional in such a way that both data transmission from the spring-end grinding machine 1 to the external server 2 and communication from the external server 2 to the spring-end grinding machine 1 is enabled. In addition to the server communication device 21, the server 2 includes a computing unit 22 and a storage unit 20. In the storage unit 20, the data recorded by the sensor 30 or the sensors 30 in the grinding wheel 13 or in the grinding wheels 13 can, if necessary, be correlated with the other data associated process data are stored and used for subsequent control or evaluation routines.

Reference list:

1

spring end grinding machine

2

server

3

coil spring

4

grinding zone

10

loading plate

11

grinding unit

12

Grinder communication facility

13

grinding wheel

131

grinding surface

14

storage unit

15

workpiece receiving opening

16

sliding plate

17

turntable

20

storage unit

21

server communications facility

22

unit of account

23

wireless connection

30

sensor

31

evaluation unit

40

processing unit

41

storage unit

42

unit of account

43

data management unit

50

transmission facility

51

transmitter unit

52

receiving unit

53

wireless connection

100

system

A

Axis of rotation of the loading plate

B

Axis of rotation of the grinding wheel

C

Axis of rotation of the turntable

M

axis of symmetry

Claims (17)

1. Spring end grinding machine (1), comprising:

   - at least one loading plate (10), mounted such as to be rotatable about an axis of rotation (A), for loading with workpieces (3), in particular coil springs (3);

   - a grinding unit (11) with at least one grinding disk (13) mounted such as to be rotatable about an axis of rotation (B), wherein the axis of rotation (B) of the grinding disk (13) is substantially parallel to the axis of rotation (A) of the loading plate (10);

   characterized by

   - at least one sensor (30) for detecting grinding disk information, in particular a temperature and/or a degree of wear of the grinding disk (13),
   wherein the sensor (30) is integrated in the grinding disk (13), in particular is accommodated in the grinding disk (13);

   - a processing unit (40) which is designed to output a control command for controlling the spring end grinding machine (1) on the basis of grinding disk information transmitted to the processing unit (40) and/or to store the grinding disk information in a memory unit (41);

   - a transfer device (50) for transferring grinding disk information from the sensor (30) to the processing unit (40), wherein the transfer device (50) is designed for wireless bidirectional data communication between the grinding disk (13) and the processing unit (40).
2. Spring end grinding machine (1) according to claim 1,
   characterized in that
   the grinding disk information includes a characteristic value for the type of grinding disk (13), wherein grinding disk parameters which in particular are specific to a type of grinding disk are stored in the processing unit (40).
3. Spring end grinding machine (1) according to claim 1 or 2,
   characterized in that
   a sensor (30) is designed as a thermocouple and/or a sensor (30) is designed as an infrared sensor, wherein at least one pair of electrodes of the thermocouple and/or a light guide, respectively, is oriented in a substantially axial direction of the grinding disk, in particular is accommodated in a grinding disk body.
4. Spring end grinding machine (1) according to claim 3,
   characterized in that
   a pair of electrodes of the thermocouple is connected to a resonant circuit, in particular of an evaluation unit (31) of the sensor (30), in order to determine a degree of wear of the grinding disk (13), in particular on the basis of a detected resonant signal of the resonant circuit.
5. Spring end grinding machine (1) according to any one of the preceding claims,
   characterized in that
   a sensor (30) comprises a piezoelectric element and in particular is designed as an ultrasonic sensor.
6. Spring end grinding machine (1) according to any one of the preceding claims,
   characterized in that
   a sensor (30) is a rotational speed sensor, in particular an acceleration sensor, for detecting the number of revolutions of the grinding disk (13).
7. Spring end grinding machine (1) according to any one of the preceding claims,
   characterized in that
   the grinding disk (13) has an evaluation unit (31) which is designed to process sensor signals generated by the sensor (30) and containing grinding disk information, wherein the evaluation unit (31) is in particular integrated in a grinding disk mount, preferably in the grinding disk flange.
8. Spring end grinding machine (1) according to any one of the preceding claims,
   characterized in that
   the grinding disk (13) has

   - a memory unit (14) for storing grinding disk data containing grinding disk information, and

   - a data transfer interface for reading out recorded grinding disk data, in particular grinding disk data sets, which describe grinding disk information trends over time.
9. Spring end grinding machine (1) according to any one of the preceding claims,
   characterized in that
   the processing unit (40) has

   - a memory unit (41) for storing grinding disk data containing grinding disk information, and

   - a computing unit (42) which is designed to calculate a control command for the spring end grinding machine (1) on the basis of actual grinding disk data and target grinding disk data stored in the memory unit (41), in particular stored grinding process parameters and/or workpiece parameters.
10. Spring end grinding machine (1) according to any one of the preceding claims,
    characterized in that
    the transfer device (50) comprises a transmitting unit (51), which is connected to the sensor (30) and in particular is arranged in the grinding unit (11), and a receiving unit (52), which is connected to the processing unit (40), for the contactless transfer of grinding disk information.
11. Spring end grinding machine (1) according to any one of the preceding claims, in particular according to claim 10,
    characterized in that
    the transfer device (50) is designed to transfer sensor signals, which are detected by the sensor (30) and contain grinding disk information, to the processing unit (40) in an inductive, capacitive or other suitable manner, in particular wirelessly, wherein the transmitting unit (51) and the receiving unit (52) are embodied in particular as induction coils which are coaxial with the axis of rotation (B) of the grinding disk.
12. System (100) for controlling a spring end grinding machine, characterized by

    - a spring end grinding machine according to any one of claims 1 to 11;

    - a server (2) having a memory unit (20) for storing grinding disk data containing grinding disk information;

    - at least one grinding machine communication device (12) for communication between the spring end grinding machine (1) and the server (2) via a wireless network connection; and/or

    - a server communication device (21) for communication between the server (2) and the spring end grinding machine (1) via a wireless network connection.
13. Grinding machine control system according to claim 12,
    characterized in that

    the server communication device (21) is designed to receive actual grinding disk data from the grinding machine communication device (12),

    wherein the server (2) has a computing unit (22) which is designed to calculate a control command for the spring end grinding machine (1) on the basis of received actual grinding disk data and target grinding disk data stored on the server (2), in particular stored grinding process parameters and/or workpiece parameters,

    wherein the server communication device (21) is designed to transmit the control command to the grinding machine communication device (12).
14. Grinding machine control system according to claim 12 or 13,
    characterized in that
    a grinding machine communication device (12) is arranged in or on the grinding unit (11), in particular in or on the grinding disk (13), and is connected to the sensor (30), and/or a grinding machine communication device (12) is connected to the processing unit (40) .
15. Method for controlling a spring end grinding machine (1) according to any one of claims 1 to 11,

    wherein the method for controlling the spring end grinding machine (1) comprises the following steps:

    - the at least one sensor (30) detects grinding disk information;

    - the transfer device (50) transfers grinding disk information from the sensor (30) to the processing unit (40) of the spring end grinding machine (1),

    - at least one grinding machine communication device (12) transmits grinding disk information from the spring end grinding machine (1) to a server communication device (21) of a server (2), in particular via a wireless network connection; and/or

    - grinding disk data containing grinding disk information are stored on the server (2), in particular in a memory unit (20) of the server (2); and/or

    - the grinding machine communication device (12) of the spring end grinding machine (1) receives grinding disk data, in particular target grinding disk data, and/or a control command for the spring end grinding machine (1) from the server communication device (21) of the server (2), in particular via a wireless network connection,

    - the processing unit (40) outputs a control command for controlling the spring end grinding machine (1) on the basis of grinding disk information transferred to the processing unit (40) ;

    wherein the grinding disk information includes at least one of the following grinding disk information:

    - a temperature of the grinding disk (13),

    - a degree of wear of the grinding disk (13),

    - an imbalance information indicating the extent of an imbalance of the grinding disk (13),

    - an identifier of the type of grinding disk (13),

    - a rotational speed of the grinding disk (13), in particular revolutions of the grinding disk (13) thus far during operation,

    - an operating time or life span, in particular a remaining life span, of the grinding disk (13),

    - a grinding force, in particular a contact pressure, of the grinding disk (13).
16. Method for controlling a spring end grinding machine according to any one of claims 1 to 11, comprising the following steps:

    - at least one sensor (30) detects grinding disk information, wherein the sensor (30) is integrated in the grinding disk (13), in particular is accommodated in the grinding disk (13);

    - a transfer device (50) wirelessly transfers grinding disk information from the at least one sensor (30) to a processing unit (40) of the spring end grinding machine,

    - the grinding disk information is stored in a memory unit (14, 41) in order to be made available for subsequent evaluations,

    wherein the grinding disk information includes at least one of the following grinding disk information:

    - a temperature of the grinding disk,

    - a degree of wear of the grinding disk,

    - an imbalance information indicating the extent of an imbalance of the grinding disk (13),

    - an identifier of the type of grinding disk,

    - a rotational speed of the grinding disk, in particular revolutions of the grinding disk thus far during operation,

    - an operating time or life span, in particular a remaining life span, of the grinding disk,

    - a grinding force, in particular a contact pressure, of the grinding disk.
17. Computer-readable storage medium, containing instructions which cause at least one processor to implement a method according to any one of claims 15 or 16 when the instructions are executed by the processor of the server (2) or of the spring end grinding machine (1) according to any one of claims 1 to 11.

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