Measurement system, cutting tool, processing device, machine tool system, and machine tool

Abstract

The present invention addresses the problem of stably outputting a physical quantity measured at a machine tool to an external processing device. A measurement system according to one aspect of the present disclosure is provided with a first detection unit that is attached to a body of a machine tool having a cutting tool and is capable of outputting, via a wired connection, first data being a measurement result, a second detection unit that is attached to the body and is capable of outputting, via a wireless connection, second data being a measurement result, and a processing device that is provided outside the machine tool and acquires the first data and the second data.

Description

Measuring systems, cutting tools, processing equipment, machine tool systems and machine tools

[0001] The present disclosure relates to a measurement system that measures physical quantities during cutting processing.

[0002] Systems are known that measure physical quantities (such as vibration modes) during cutting and detect abnormalities from these physical quantities. Known such systems include a type in which a detector attached to the machine tool body measures the physical quantities and outputs the physical quantities to an external processing device via wired communication (Patent Document 1), and a type in which a detector attached to the cutting tool measures the physical quantities and outputs the physical quantities to an external processing device via wireless communication (Patent Document 2).

[0003] Japanese Patent Application Publication No. 2004-160564 International Publication No. 2021 / 152831

[0004] A measurement system according to one aspect of the present disclosure includes a first detection unit attached to a main body of a machine tool having a cutting tool and capable of outputting first data, which is a measurement result, via a wired connection; a second detection unit attached to the main body and capable of outputting second data, which is a measurement result, via a wireless connection; and a processing device provided outside the machine tool and configured to acquire the first data and the second data.

[0005] A cutting tool according to one aspect of the present disclosure is a cutting tool mounted on the main body of a machine tool, and is equipped with a second detection unit that can output second data, which is the measurement result, via a wireless connection to a processing device provided outside the machine tool, which can acquire first data, which is the measurement result, via a wired connection from a first detection unit attached to the main body of the machine tool.

[0006] A processing device according to one aspect of the present disclosure acquires first data, which is a measurement result, via a wired connection from a first detection unit attached to the main body of a machine tool having a cutting tool, and acquires second data, which is a measurement result, via a wireless connection from a second detection unit attached to the main body, and is provided outside the machine tool.

[0007] A machine tool system according to one aspect of the present disclosure includes a machine tool main body having a cutting tool, a first detection unit attached to the main body and capable of outputting first data, which is a measurement result, via a wired connection, a second detection unit attached to the main body and capable of outputting second data, which is a measurement result, via a wireless connection, and a processing device provided outside the machine tool and which acquires the first data and the second data.

[0008] A machine tool according to one aspect of the present disclosure includes a first detection unit attached to a machine tool having a cutting tool and capable of outputting first data, which is a measurement result, to a processing device provided outside the machine tool via a wired connection, and a second detection unit attached to the main body or the cutting tool and capable of outputting second data, which is a measurement result, to the processing device via a wireless connection.

[0009] FIG. 1 is a block diagram showing a main configuration of a machine tool system according to an embodiment of the present disclosure; FIG. 2 is a schematic diagram showing a turret to which a cutting tool according to an embodiment of the present disclosure is attached; FIG. 3 is a perspective view of a first cutting tool according to an embodiment of the present disclosure; FIG. 4 is a waveform showing an example of first data and second data measured in a machining process with a large cutting amount and a machining process with a small cutting amount; FIG. 5 is a waveform diagram showing an example of waveforms of the first data and the second data; FIG. 6 is a graph showing an example of second data acquired by a processing device via a wireless connection according to an embodiment of the present disclosure; and FIG. 7 is a graph showing data in which a period in which second data is missing is complemented with first data.

[0010] The type of Patent Document 1 can stably output measured physical quantities to an external processing device, but the measurement accuracy of the physical quantities may be insufficient in machining with a small amount of cutting, such as finish machining. The type of Patent Document 2 has high measurement accuracy of physical quantities even in machining with a small amount of cutting, but the output of measured physical quantities to an external processing device may be unstable due to reasons such as communication interruptions. There is a demand for a measurement system that can stably output physical quantities measured in a machine tool to an external processing device. According to one aspect of the present disclosure, physical quantities measured in a machine tool can be stably output to an external processing device.

[0011] An embodiment of the present disclosure will be described in detail below. Fig. 1 is a block diagram showing the configuration of a main part of a machine tool system 100 according to this embodiment. As shown in Fig. 1, the machine tool system 100 includes a machine tool 10 and a processing device 50.

[0012] Fig. 2 is a schematic diagram showing a turret 11 to which cutting tools are attached. As shown in Figs. 1 and 2, machine tool 10 includes turret 11, workpiece drive unit 12, first detection unit 13, first cutting tool 21, second cutting tool 22, third cutting tool 23, and fourth cutting tool 24. Turret 11 is one of the components that make up main body 10a of machine tool 10 in one embodiment. Machine tool 10 is not limited to a machine having turret 11 and called a lathe, but may also be a machine called a milling machine or a grinding machine.

[0013] The turret 11 is a tool post to which multiple tools can be attached radially. In this embodiment, the turret 11 has a circular top surface, but the turret 11 of the present disclosure is not limited to this shape. In this embodiment, as shown in FIG. 2 , a first cutting tool 21, a second cutting tool 22, a third cutting tool 23, and a fourth cutting tool 24 are attached to the turret 11. However, the number of cutting tools attached to the turret 11 is not limited to four, and may be one, two, three, five, or more. By rotating, the turret 11 can switch the cutting tool positioned to cut the workpiece W between the first cutting tool 21, the second cutting tool 22, the third cutting tool 23, and the fourth cutting tool 24.

[0014] The workpiece driving unit 12 is a mechanism that drives the workpiece W (see FIG. 3 ) relative to a cutting tool that is positioned on the turret 11 at a position where the workpiece W can be cut. Specifically, the workpiece driving unit 12 rotates the workpiece W about a rotation axis and translates the workpiece W in a direction parallel to the direction of the rotation axis. The current used by the workpiece driving unit 12 to drive the workpiece W may be supplied from a power distribution panel provided in the machine tool 10.

[0015] The first detection unit 13 is attached to the main body 10a of the machine tool 10, and is capable of measuring physical quantities during cutting and outputting data representing the measurement results (hereinafter referred to as first data) via a wired connection. In this embodiment, the first detection unit 13 measures the current supplied from the switchboard to the workpiece drive unit 12 as the physical quantity. In other words, the first detection unit 13 measures the current with which the machine tool 10 drives the workpiece W. The first detection unit 13 outputs the measured current data to the processing device 50 via a wired connection. The first detection unit 13 may be attached to the turret 11, the jig, or the workpiece W.

[0016] Here, the current supplied from the distribution board to the workpiece driving unit 12 changes depending on the resistance of the cutting tool to the workpiece W during cutting, as the workpiece driving unit 12 rotates the workpiece W around the rotation axis. Specifically, as the resistance of the cutting tool to the workpiece W during cutting increases, the required power increases, and the current supplied to the workpiece driving unit 12 increases. On the other hand, when the resistance of the cutting tool to the workpiece W is large, the vibration generated in the cutting tool cutting the workpiece W increases. For these reasons, the magnitude of the current supplied from the distribution board to the workpiece driving unit 12 corresponds to the magnitude of the vibration generated in the cutting tool.

[0017] The first detection unit 13 may measure not only the current supplied to the workpiece driving unit 12 to rotate the workpiece W around the rotation axis, but also another physical quantity. For example, the first detection unit 13 may also measure the current supplied to translate the workpiece driving unit 12. The first detection unit 13 may also measure the current supplied to rotate the turret 11.

[0018] 3 is a perspective view of the first cutting tool 21. As shown in FIG. 3, the first cutting tool 21 includes a tip 31, a holder 32 that holds the tip 31, and a second detection unit 33.

[0019] The tip 31 is a member that cuts the workpiece W by coming into contact with the workpiece W rotated by the workpiece driving unit 12. The tip 31 is made of a hard material, such as an alloy obtained by sintering and bonding tungsten carbide and an iron-based metal. The shape of the tip 31 is not particularly limited, but may be, for example, a triangular prism shape, as shown in FIG. 3 .

[0020] The second detection unit 33 measures physical quantities during cutting and can output data representing the measurement results (hereinafter referred to as second data) via wireless connection. In this embodiment, the second detection unit 33 includes an acceleration sensor 33A and a communication unit 33B for wireless connection. Examples of physical quantities that can be measured by the second detection unit 33 include vibration, strain, temperature, and angular velocity.

[0021] Acceleration sensor 33A measures the vibration generated in first cutting tool 21 as the physical quantity. Acceleration sensor 33A may be attached inside holder 32. Here, vibration generated by cutting workpiece W with second cutting tool 22, third cutting tool 23, or fourth cutting tool 24 is transmitted to first cutting tool 21 via turret 11. Therefore, acceleration sensor 33A can measure the vibration of the cutting tool that is performing cutting, out of second cutting tool 22, third cutting tool 23, or fourth cutting tool 24, during the period when workpiece W is being cut by second cutting tool 22, third cutting tool 23, or fourth cutting tool 24.

[0022] Therefore, even when acceleration sensor 33A is provided only on first cutting tool 21, it is possible to measure vibrations occurring in second cutting tool 22, third cutting tool 23, and fourth cutting tool 24. From the viewpoint of measuring vibrations occurring in first cutting tool 21, second cutting tool 22, third cutting tool 23, and fourth cutting tool 24, acceleration sensor 33A may be attached away from these cutting tools. However, when acceleration sensor 33A is provided on first cutting tool 21, vibrations occurring in first cutting tool 21 can be measured with the highest accuracy.

[0023] The communication unit 33B wirelessly outputs second data, which is the measurement result of the acceleration sensor 33A measuring the vibration generated in the first cutting tool 21, to the processing device 50. The wireless connection may be based on a known technology such as Wi-Fi (registered trademark).

[0024] Power may be supplied to second detection unit 33 from main body 10a of the machine tool, or, as shown in Fig. 3, from a battery 91 provided external to the machine tool via a cable 92. In the latter case, second detection unit 33 is powered not from machine tool 10 but from external battery 91, which makes it easy to attach and detach first cutting tool 21 to and from main body 10a of machine tool 10. Also, machine tool 10 does not need to be provided with a member for supplying power to second detection unit 33. Power may be supplied to second detection unit 33 from the switchboard.

[0025] With regard to battery 91, "provided outside the machine tool" means that power is not supplied to second detection unit 33 from machine tool 10. Therefore, battery 91 may be housed in a housing of main body 10a that constitutes machine tool 10, for example.

[0026] The second cutting tool 22, the third cutting tool 23, and the fourth cutting tool 24 may have the same configuration as the first cutting tool 21, except that the type of attached chip 31 is different from that of the first cutting tool 21 and that they do not have the second detection unit 33.

[0027] As described above, the machine tool system 100 in this embodiment includes the machine tool 10 and the processing device 50. The machine tool 10 may include a main body 10a, a first detection unit 13, and a second detection unit 33. The main body 10a may include a housing and a plurality of cutting tools (first cutting tool 21, second cutting tool 22, third cutting tool 23, and fourth cutting tool 24). The housing may have a tool rest that holds the cutting tools. An example of a tool rest is a turret 11. The housing may have a member that secures a workpiece to be machined.

[0028] The first detector 13 and the second detector 33 are each attached to the main body 10a of the machine tool 10. The first detector 13 is capable of outputting first data, which is the measurement result, via a wired connection. The second detector 33 is capable of outputting second data, which is the measurement result, via a wireless connection.

[0029] In the example shown in the figure, the first detection unit 13 is attached to the housing at a distance from the multiple cutting tools. However, the location where the first detection unit 13 is attached is not limited to this. In the example shown in the figure, the second detection unit 33 is attached to the first cutting tool 21, which is one of the multiple cutting tools, at a distance from the housing. However, the location where the second detection unit 33 is attached is not limited to this. For example, the second detection unit 33 may be attached to the housing at a distance from the multiple cutting tools, similar to the first detection unit 13.

[0030] Generally, cutting involves multiple processes, such as rough machining, which requires a large amount of cutting, and finish machining, which requires a small amount of cutting. Therefore, a cutting tool appropriate for the amount of cutting may be used for each process. In the machine tool 10, by rotating the turret 11, a cutting tool appropriate for the amount of cutting for each process can be selected from the first cutting tool 21, the second cutting tool 22, the third cutting tool 23, and the fourth cutting tool 24 to cut the workpiece W. In this embodiment, a configuration for performing finish machining using the first cutting tool 21 will be described.

[0031] The processing device 50 acquires the first data and the second data output from the first detection unit 13 and the second detection unit 33, respectively, and uses the first data and the second data to evaluate the state of the tip 31 of each of the first cutting tool 21, the second cutting tool 22, the third cutting tool 23, and the fourth cutting tool 24. The processing device 50 is provided outside the machine tool 10. As shown in FIG. 1 , the processing device 50 includes a first communication unit 51, a second communication unit 52, an input unit 53 that accepts input operations to the processing device 50, a display unit 54 that displays various information, a memory unit 55 that stores various data used by the processing device 50, and a control unit 60. The first detection unit 13, the second detection unit 33, and the processing device 50 constitute a measurement system in the machine tool system 100.

[0032] The first communication unit 51 communicates with the first detection unit 13 via the wired connection. The second communication unit 52 communicates with the second detection unit 33 via the wireless connection.

[0033] The control unit 60 controls each unit of the processing device 50. The control unit 60 includes a first acquisition unit 61, a second acquisition unit 62, and an evaluation unit 63.

[0034] The first acquisition unit 61 acquires the first data output from the first detection unit 13 via the first communication unit 51. The first acquisition unit 61 may store the acquired first data in the storage unit 55.

[0035] The second acquisition unit 62 acquires the second data output from the second detection unit 33 via the second communication unit 52. The second acquisition unit 62 may store the acquired second data in the storage unit 55.

[0036] The evaluation unit 63 evaluates the state of the tip 31 of each of the first cutting tool 21, the second cutting tool 22, the third cutting tool 23, and the fourth cutting tool 24 based on the first data and the second data.

[0037] For example, the evaluation unit 63 may evaluate the wear of the tips 31 included in each of the first cutting tool 21, the second cutting tool 22, the third cutting tool 23, and the fourth cutting tool 24 based on the first data and the second data. As described above, the magnitude of the current supplied to the workpiece driving unit 12, which is the first data, corresponds to the magnitude of the vibration generated in the cutting tools. The second data is the measurement results of the vibration generated in the first cutting tool 21, the second cutting tool 22, the third cutting tool 23, and the fourth cutting tool 24. The vibration generated in the cutting tools varies depending on the amount of wear in the tips 31 included in the cutting tools. Therefore, the wear of the tips 31 included in each of the first cutting tool 21, the second cutting tool 22, the third cutting tool 23, and the fourth cutting tool 24 can be evaluated from the first data or the second data.

[0038] Here, the characteristics of the first data and the second data will be explained with reference to FIG. 4. FIG. 4 shows waveforms illustrating examples of the first data and the second data measured in a machining process with a large cutting volume and a machining process with a small cutting volume. As shown in FIG. 4, the output value increases as the machining time increases in both machining processes. This is because the tip 31 wears more as the machining time increases, resulting in increased vibrations in the cutting tool. However, in machining processes with a small cutting volume, the resistance of the cutting tool to the workpiece W is small, making it difficult to confirm significant displacement in the first data, which indicates the magnitude of the current supplied to the workpiece drive unit 12.

[0039] On the other hand, significant displacement can be confirmed in the second data measured by the acceleration sensor 33A. Therefore, in the case of a finish machining process in which the cutting amount is small, the evaluation unit 63 may evaluate the wear of the tip 31 provided in the first cutting tool 21 based on the second data. This makes it possible to accurately evaluate the wear of the tip 31 provided in the first cutting tool 21.

[0040] Here, when second detection unit 33 (acceleration sensor 33A) is located closer to each of the multiple cutting tools (first cutting tool 21, second cutting tool 22, third cutting tool 23, and fourth cutting tool 24) than first detection unit 13, the magnitude of vibrations occurring in the cutting tools is more easily detected, and therefore significant displacement is more easily confirmed in the second data. In particular, when second detection unit 33 (acceleration sensor 33A) is attached to at least one of the multiple cutting tools, the magnitude of vibrations occurring in the cutting tools is more easily detected, and therefore significant displacement is more easily confirmed in the second data.

[0041] In the case of a machining process with a large amount of cutting, significant displacement can be confirmed in both the first data and the second data, but a more significant change can be confirmed in the first data. Therefore, the evaluation unit 63 may use the first data to evaluate the wear of the tips 31 provided on the first cutting tool 21, the second cutting tool 22, the third cutting tool 23, and the fourth cutting tool 24. This enables accurate evaluation of the wear of the tips 31 provided on the first cutting tool 21, the second cutting tool 22, the third cutting tool 23, and the fourth cutting tool 24. In this case, the processing device 50 may instruct the second detection unit 33 to stop measurement by the acceleration sensor 33A during a machining process with a large amount of cutting. This reduces power consumption of the battery 91.

[0042] The processing device 50 may determine whether the currently performed machining process involves a large amount of cutting or a small amount of cutting, for example, as follows. That is, the processing device 50 may determine that the currently performed machining process involves a large amount of cutting if the first data or the second data contains an output value equal to or greater than a predetermined threshold value for a predetermined period from the start of the process, and may determine that the currently performed machining process involves a small amount of cutting if the first data or the second data contains no output value equal to or greater than the threshold value. Then, if the processing device 50 determines that the currently performed machining process involves a large amount of cutting, it may instruct the second detection unit 33 to stop measurement by the acceleration sensor 33A for that process. This reduces power consumption of the battery 91.

[0043] The processing device 50 may select, from the first data and the second data, data to be used as data for evaluating wear of the tip 31, as follows. That is, the processing device 50 may calculate, for each of the first data and the second data, a rate of change between a measured value at the start of each process and a measured value a predetermined period after the start of the process, and use either the first data or the second data, whichever has the larger rate of change, to evaluate wear of the tip 31. This allows wear of the tip 31 to be evaluated using either the first data or the second data, whichever has the larger change, thereby enabling accurate evaluation of wear of the tip 31.

[0044] When evaluating the rate of change of the measured value, the first data and the second data may be used directly or after undergoing a predetermined process, such as removing momentary abnormal values ​​of the measured value that may be evaluated as noise, before evaluating the rate of change of the measured value.

[0045] Here, since the second data is output to the processing device 50 via a wireless connection, data loss due to communication failure is more likely to occur compared to the first data output via a wired connection. Therefore, in the machine tool system 100 according to one aspect of the present disclosure, when there is a loss in the second data, the processing device 50 may supplement the data for the period of the loss with the first data. In other words, the processing device 50 may supplement the period of the loss of the second data with the first data.

[0046] A configuration for complementing a period in which second data is missing with first data will be described below with reference to FIGS. 5 to 7. FIG. 5 is a waveform diagram showing an example of the waveforms of the first data and second data. The first data and second data shown in FIG. 5 are measurement results measured at the same timing. FIG. 6 is a graph showing an example of the second data shown in FIG. 5 acquired by the processing device 50 via a wireless connection.

[0047] As shown in Fig. 6 , the second data acquired by the processing device 50 via a wireless connection may contain missing data due to a communication failure. In this case, the evaluation unit 63 of the processing device 50 may complement the missing period of the second data, surrounded by a dashed line in Fig. 6 , with data from the missing period in the first data shown in Fig. 5 . This makes it possible to generate data without any missing data, as shown in Fig. 7 . By using the generated data, the evaluation unit 63 can accurately evaluate the wear of the first cutting tool 21, the second cutting tool 22, the third cutting tool 23, and the fourth cutting tool 24.

[0048] As described above, the machine tool system 100 in this embodiment comprises a first detection unit 13 attached to the main body 10a of the machine tool 10 and capable of outputting the first data, which is the measurement result, via a wired connection, a second detection unit 33 attached to the main body 10a of the machine tool 10 and capable of outputting the second data, which is the measurement result, via a wireless connection, and a processing device 50 provided outside the machine tool 10 and which acquires the first data and the second data.

[0049] According to the above configuration, the processing device 50 acquires the first data measured by the first detection unit 13 via a wired connection and the second data measured by the second detection unit 33 via a wireless connection. This allows the first data and the second data to be used in combination, or separately. For example, if one data cannot be acquired, it can be supplemented with the other data. Furthermore, if both data can be acquired, processing can be performed using only one data. This improves the measurement accuracy and sensitivity of the physical quantities measured by the machine tool 10, allowing the measured physical quantities to be stably output to the external processing device 50. Furthermore, control can be performed to prevent the reception of the other data not used in processing, thereby avoiding unnecessary power consumption.

[0050] The invention according to the present disclosure has been described above based on the drawings and examples. However, the invention according to the present disclosure is not limited to the above-described embodiments. In other words, the invention according to the present disclosure can be modified in various ways within the scope of the present disclosure, and embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the invention according to the present disclosure. In other words, it should be noted that a person skilled in the art can easily make various modifications or corrections based on the present disclosure. It should also be noted that these modifications or corrections are included in the scope of the present disclosure.

[0051] (Summary) The measurement system according to aspect 1 of the present disclosure comprises a first detection unit attached to the main body of a machine tool having a cutting tool and capable of outputting first data, which is the measurement result, via a wired connection, a second detection unit attached to the main body and capable of outputting second data, which is the measurement result, via a wireless connection, and a processing device provided outside the machine tool and which acquires the first data and the second data.

[0052] A measurement system according to a second aspect of the present disclosure may be configured in the first aspect above such that the second detection unit is positioned closer to the cutting tool than the first detection unit.

[0053] A measurement system according to a third aspect of the present disclosure may be configured in the first aspect above such that the second detection unit is attached to the cutting tool.

[0054] A measurement system according to a fourth aspect of the present disclosure may be configured in any one of the first to third aspects, wherein the second detection unit measures vibrations generated in the cutting tool.

[0055] A measurement system according to a fifth aspect of the present disclosure may be configured in the fourth aspect above, wherein the processing device evaluates wear of the cutting tool based on the second data.

[0056] A measurement system according to a sixth aspect of the present disclosure may be configured in any one of the first to fifth aspects above, wherein the second detection unit is powered by a battery provided outside the machine tool.

[0057] A measurement system according to a seventh aspect of the present disclosure may be configured in any one of the first to sixth aspects above, wherein the first detection unit measures the current with which the machine tool drives a workpiece.

[0058] A measurement system according to an eighth aspect of the present disclosure may be configured in the seventh aspect above, wherein the processing device evaluates wear of the cutting tool based on the first data.

[0059] A measurement system according to a ninth aspect of the present disclosure is any one of the first to eighth aspects, wherein the processing device may complement a period in which the second data is missing with the first data.

[0060] A measurement system according to aspect 10 of the present disclosure may be configured in any one of aspects 1 to 9 above, wherein the first detection unit measures the current with which the machine tool drives the workpiece, the second detection unit measures the vibration generated in the cutting tool, and the processing device evaluates the wear of the cutting tool based on the first data or the second data, whichever has a larger rate of change.

[0061] A cutting tool according to aspect 11 of the present disclosure is a cutting tool mounted on a machine tool, and is equipped with a second detection unit that can output second data, which is a measurement result, via a wireless connection to a processing device provided outside the machine tool, which can acquire first data, which is a measurement result, via a wired connection from a first detection unit attached to the main body of the machine tool.

[0062] A processing device according to aspect 12 of the present disclosure acquires first data, which is a measurement result, from a first detection unit attached to the main body of a machine tool having a cutting tool via a wired connection, and acquires second data, which is a measurement result, from a second detection unit attached to the main body via a wireless connection, and is provided outside the machine tool.

[0063] A machine tool system according to aspect 13 of the present disclosure comprises a machine tool main body having a cutting tool, a first detection unit attached to the main body and capable of outputting first data, which is a measurement result, via a wired connection, a second detection unit attached to the main body and capable of outputting second data, which is a measurement result, via a wireless connection, and a processing device provided outside the machine tool and which acquires the first data and the second data.

[0064] A machine tool according to aspect 14 of the present disclosure comprises a first detection unit attached to a main body of the machine tool having a cutting tool and capable of outputting first data, which is a measurement result, to a processing device provided outside the machine tool via a wired connection, and a second detection unit attached to the main body or the cutting tool and capable of outputting second data, which is a measurement result, to the processing device via a wireless connection.

[0065] In other words, the machine tool according to aspect 14 of the present disclosure comprises a main body, a cutting tool, a first detection unit, and a second detection unit. The cutting tool and the first detection unit are attached to the main body. The first detection unit is capable of outputting first data, which is the measurement result, to the processing device via a wired connection. The processing device is provided outside the machine tool. The second detection unit is attached to the main body or the cutting tool. The second detection unit is capable of outputting second data, which is the measurement result, to the processing device via a wireless connection.

[0066] REFERENCE SIGNS LIST 10 Machine tool 10a Main body 13 First detection unit 21 First cutting tool 22 Second cutting tool 23 Third cutting tool 24 Fourth cutting tool 33 Second detection unit 50 Processing device 91 Battery 100 Machine tool system

Claims

1. A measurement system comprising: a first detection unit attached to the main body of a machine tool having a cutting tool and capable of outputting first data, which is the measurement result, via a wired connection; a second detection unit attached to the main body and capable of outputting second data, which is the measurement result, via a wireless connection; and a processing device provided outside the machine tool and which acquires the first data and the second data.

2. The measurement system according to claim 1, wherein the second detection unit is located closer to the cutting tool than the first detection unit.

3. The measurement system according to claim 2, wherein the second detection unit is attached to the cutting tool.

4. A measurement system according to any one of claims 1 to 3, wherein the second detection unit measures vibrations occurring in the cutting tool.

5. The measurement system according to claim 4, wherein the processing device evaluates wear of the cutting tool based on the second data.

6. A measurement system according to any one of claims 1 to 5, wherein the second detection unit is powered by a battery provided outside the machine tool.

7. A measurement system according to any one of claims 1 to 6, wherein the first detection unit measures a current with which the machine tool drives a workpiece.

8. The measurement system according to claim 7, wherein the processing device estimates wear of the cutting tool based on the first data.

9. The measurement system according to any one of claims 1 to 8, wherein the processing device complements a period in which the second data is missing with the first data.

10. A measurement system as described in any one of claims 1 to 9, wherein the first detection unit measures the current with which the machine tool drives the workpiece, the second detection unit measures vibrations generated in the cutting tool, and the processing device evaluates wear of the cutting tool based on the first data or the second data, whichever has a larger rate of change.

11. A cutting tool mounted on a machine tool, which is equipped with a second detection unit that can acquire first data, which is a measurement result, via a wired connection from a first detection unit attached to the main body of the machine tool, and can output second data, which is a measurement result, via a wireless connection to a processing device provided outside the machine tool.

12. A processing device that acquires first data, which is a measurement result, via a wired connection from a first detection unit attached to the main body of a machine tool having a cutting tool, and acquires second data, which is a measurement result, via a wireless connection from a second detection unit attached to the main body, and is provided external to the machine tool.

13. A machine tool system comprising: a machine tool main body having a cutting tool; a first detection unit attached to the main body and capable of outputting first data, which is a measurement result, via a wired connection; a second detection unit attached to the main body and capable of outputting second data, which is a measurement result, via a wireless connection; and a processing device provided outside the machine tool and which acquires the first data and the second data.

14. A machine tool comprising: a first detection unit attached to the main body of a machine tool having a cutting tool, and capable of outputting first data, which is the measurement result, to a processing device provided outside the machine tool via a wired connection; and a second detection unit attached to the main body or the cutting tool, and capable of outputting second data, which is the measurement result, to the processing device via a wireless connection.

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