Anomaly detection device and method for detecting anomalies in a shot peening device

Abstract

To highly accurately detect abnormality of a shot peening device.SOLUTION: An abnormality detector 10 in one aspect comprises: a control device 60; an arc height measuring unit 52 for measuring an arc height value expressing a strain amount caused in a test piece when shot peening has been applied to the test piece from a shot peening device; a processing condition measuring unit 50 for measuring a parameter value related to a processing condition of the shot peening device at the time shot peening was applied to the test piece; and a transmitting unit 54 for transmitting the arc height value and the parameter value to the control device 60. The control device 60 includes: a receiving unit 61 for receiving the arc height value and the parameter value; a storing unit 62 for storing the arc height value and the parameter value in association with a shot peening date and time; and an abnormality detecting unit 65 for determining presence / absence of abnormality of the peening device, on the basis of time series data of the arc height value and the parameter value.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to an anomaly detection device and a method for detecting an anomaly in a shot peening device. [Background technology]

[0002] Patent Document 1 describes an anomaly detection system that detects anomalies in a blasting machine that sprays blasting material together with compressed gas. This anomaly detection system uses a microphone to collect sounds generated in monitored parts such as the piping of the blasting machine, extracts signals in a specific frequency band from the collected sounds, and detects anomalies in the blasting machine by comparing the extracted frequency band signals with a standard output value. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2005-224882 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the system described in Patent Document 1, if a hose breaks near the monitored area, it is possible to detect an abnormality in the device by analyzing the collected audio signal, but if an abnormality occurs in a location away from the monitored area, it may not be possible to discover the abnormality from the audio signal. Therefore, the system described in Patent Document 1 has room for improvement in terms of the accuracy of abnormality detection.

[0005] Therefore, an object of the present disclosure is to provide an abnormality detection device capable of detecting an abnormality in a shot peening apparatus with high accuracy. [Means for solving the problem]

[0006] In one aspect, an anomaly detection device is provided that detects an anomaly in a shot peening device. The anomaly detection device includes a control device, an arc height measurement unit that measures an arc height value that indicates an amount of distortion generated in a test piece when shot peening is performed on the test piece by the shot peening device, a processing condition measurement unit that measures parameter values ​​related to processing conditions of the shot peening device when shot peening is performed on the test piece, and a transmission unit that transmits the arc height value and the parameter value to the control device. The control device includes a receiving unit that receives the arc height value and the parameter value, a storage unit that stores the arc height value and the parameter value in association with the date and time of the shot peening, and an anomaly detection unit that determines whether or not an anomaly has occurred in the peening device based on time series data of the arc height value and the parameter value.

[0007] In the anomaly detection device of this embodiment, when shot peening is performed, the arc height value and parameter values ​​related to the processing conditions are measured. Here, the arc height value measured by the arc height measurement unit is a highly accurate actual value measured by actually performing shot peening on a test piece. Therefore, by using the measured arc height value and parameter values, anomalies in the shot peening device can be detected with high accuracy. Furthermore, in this embodiment, time series data of the arc height value and the parameter values ​​are used, so that by analyzing the trends of changes in the arc height value and the parameter values, anomalies can be detected early when a sign of anomaly appears.

[0008] In the anomaly detection device of one aspect, the transmitter may transmit the arc height value and the parameter value to the control device by wireless communication. In this aspect, the parameter value and the arc height value can be easily transmitted to the control device.

[0009] In one embodiment, the control device may further include an alarm unit that outputs alert information when an abnormality in the shot peening apparatus is detected. In this embodiment, when an abnormality occurs in the shot peening apparatus, the abnormality can be notified at an early stage.

[0010] In one aspect, the control device may further include an output unit that transmits the time series data of the arc height value and the parameter value, and the alert information to a user terminal. In this aspect, the time series data of the arc height value and the parameter value, and the alert information can be displayed on the user terminal, so that the state of the shot peening apparatus can be grasped at a glance.

[0011] In one embodiment, the shot peening apparatus has a compressor that supplies compressed air, a nozzle that sprays projection material using the compressed air, piping that connects the compressor and the nozzle, and an air pressure regulating valve that is provided in the piping and adjusts the pressure of the compressed air supplied to the nozzle, and the parameter values ​​measured by the processing condition measurement unit may include any one of the pressure value of the compressed air supplied from the compressor, the internal pressure value of the piping upstream of the air pressure regulating valve, the internal pressure value of the piping downstream of the air pressure regulating valve, and the amount of projection material sprayed from the nozzle.

[0012] In one aspect, a method for detecting an abnormality in a shot peening apparatus is provided, which includes the steps of: performing shot peening on a test piece from a shot peening apparatus, measuring an arc height value representing an amount of distortion caused in the test piece by the shot peening, measuring parameter values ​​related to processing conditions of the shot peening apparatus when the shot peening was performed, storing the arc height value and the parameter values ​​in association with a date and time of the shot peening, and determining whether or not an abnormality has occurred in the shot peening apparatus based on time series data of the arc height value and the parameter values.

[0013] As described above, according to the method of the present embodiment, abnormalities in the shot peening apparatus can be detected with high accuracy. Effect of the Invention

[0014] According to various aspects of the present disclosure, abnormalities in a shot peening apparatus can be detected with high accuracy. [Brief description of the drawings]

[0015] [Figure 1] 1 is a diagram illustrating a system including an anomaly detection device according to an embodiment. [Diagram 2] 2 is a block diagram showing a functional configuration of the anomaly detection device. FIG. [Diagram 3] FIG. 11 is a diagram showing an example of time-series data of arc height values. [Figure 4] FIG. 11 is a diagram showing another example of time series data of arc height values. [Diagram 5] FIG. 11 is a diagram showing another example of time series data of arc height values. [Figure 6] FIG. 11 is a diagram showing another example of time series data of arc height values. [Figure 7] FIG. 11 is a diagram showing another example of time series data of arc height values. [Figure 8] FIG. 11 is a diagram showing another example of time series data of arc height values. [Figure 9] FIG. 11 is a diagram showing another example of time series data of arc height values. [Figure 10] FIG. 11 is a diagram showing another example of time series data of arc height values. [Figure 11] 4 is a flowchart illustrating a method for detecting anomalies in a shot peening apparatus according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. In the following description, the same or equivalent elements are denoted by the same reference numerals, and duplicated descriptions will not be repeated. The dimensional ratios of the drawings do not necessarily match those in the description. In the following description, the terms "upstream" and "downstream" are used based on the flow direction of compressed air supplied from a compressor 18 described later.

[0017] Fig. 1 is a diagram showing a schematic diagram of a system including an anomaly detection device according to one embodiment. The anomaly detection device 10 shown in Fig. 1 detects an anomaly in a shot peening device. The shot peening device 1 performs shot peening by projecting a shot material onto a treatment object in order to impart compressive residual stress to the surface of the treatment object.

[0018] First, a shot peening apparatus that is a target of anomaly detection will be described. The shot peening apparatus 1 shown in FIG. 1 is a direct pressure type shot peening apparatus. In the following description, the direct pressure type shot peening apparatus 1 will be described, but the shot peening apparatus 1 may be a suction type shot peening apparatus. The shot peening apparatus 1 projects a shot material S onto a processing object to impart compressive residual stress to the surface of the processing object. For example, steel balls are used as the shot material S projected onto the processing object. The particle size of the steel balls is appropriately selected according to the compressive residual stress to be imparted to the processing object. Examples of processing objects that are shot peened by the shot peening apparatus 1 include automobile parts such as cylinder heads and crankshafts, gears, and dies, but the processing objects are not limited to these.

[0019] As shown in Fig. 1, the shot peening apparatus 1 includes a shot material tank 12, a shot material supply device 14, a pressurized tank 16, a compressor 18, and a nozzle 20. The shot material tank 12 stores shot material S therein. The shot material tank 12 is connected to the pressurized tank 16 via the shot material supply device 14. An openable and closable poppet valve 15 is provided between the shot material supply device 14 and the pressurized tank 16. When the poppet valve 15 is opened, the shot material S stored inside the shot material tank 12 is supplied to the pressurized tank 16 via the shot material supply device 14.

[0020] The compressor 18 generates compressed air and supplies the compressed air to the pressurized tank 16 and the nozzle 20. One end of a pipe 22 is connected to the compressor 18. The other end of the pipe 22 is connected to the nozzle 20. In other words, the pipe 22 connects the compressor 18 and the nozzle 20. A pipe 24 branches off from a position between one end and the other end of the pipe 22. The pipe 24 is connected to the air inlet 16A of the pressurized tank 16.

[0021] The pressurized tank 16 has a shot outlet 16B through which the projection material S flows out. The shot outlet 16B is provided with a cut gate 26 that can be opened and closed. A pipe 28 is connected to the shot outlet 16B via the cut gate 26. The pipe 28 is provided with a shot amount adjustment valve 27 that adjusts the amount of the projection material S sprayed from the nozzle 20. The pipe 28 is connected to a midpoint of the pipe 22 (a position between one end and the other end of the pipe 22). The connection between the pipe 22 and the pipe 28 constitutes a mixing section 25A where the projection material S supplied from the pressurized tank 16 and the compressed air supplied from the compressor 18 are mixed. This mixing section 25A is located downstream in the flow direction of the compressed air from a branching section 25B where the pipe 24 branches off from the pipe 22.

[0022] An air pressure regulating valve 32 is provided in the piping 22 at a position between the compressor 18 and the branching section 25B. The air pressure regulating valve 32 adjusts the pressure of the compressed air supplied from the compressor 18 to the pressurized tank 16 and the nozzle 20. The compressed air whose pressure has been adjusted by the air pressure regulating valve 32 is branched at the branching section 25B and sent to the piping 22 and the piping 24. The compressed air sent to the piping 24 pressurizes the inside of the pressurized tank 16. The compressed air sent to the piping 22 is mixed with the projection material S supplied from the pressurized tank 16 in the mixing section 25A, and sent to the nozzle 20.

[0023] The nozzle 20 sprays the blast material S sent from the pipe 22 together with compressed air as a two-phase solid-gas flow. The nozzle 20 is disposed inside a cabinet 34. The cabinet 34 defines therein a processing chamber 34s which is a space for processing an object to be processed. A stage 38 is disposed in the processing chamber 34s. During shot peening, the nozzle 20 sprays the blast material S inside the processing chamber 34s, causing it to collide with an object to be processed placed on the stage 38.

[0024] Although not shown in Fig. 1, the shot peening apparatus 1 may further include a dust collector, a classifier, and a circulation device to reuse the used blast material S. The dust collector is connected to the processing chamber 34s via the classifier, and sucks in the blast material S and chips of the processing object that have fallen to the bottom of the processing chamber 34s and transfers them to the classifier. The classifier is, for example, a cyclone-type classifier, and receives the blast material S and chips of the processing object, and classifies them into granules that can be reused as blast material S and granules that cannot be used as blast material S. The circulation device returns the reusable blast material S to the blast material tank 12 via a packet elevator, a screw conveyor, a separator, etc.

[0025] When the shot material S projected from the shot peening device 1 collides with the treatment object, a transformation of the metal structure occurs on the surface of the treatment object, and compressive residual stress is imparted to the surface of the treatment object. Here, the compressive residual stress to be imparted to the treatment object needs to be within an appropriate range according to the application of the treatment object. Therefore, before the treatment object is shot peened, a test piece is shot peened, and it is periodically inspected whether the peening strength imparted to the test piece is within an appropriate range. In the following description, the shot peening performed on a test piece to check the peening strength is referred to as a practice shot peening. The practice shot peening is performed once or multiple times before the treatment object is shot peened, for example, at the start of work every morning.

[0026] In one embodiment, the anomaly detection device 10 acquires parameter values ​​related to the processing conditions of the shot peening device 1 and an arc height value representing the amount of distortion of a test piece during a rehearsal shot peening, and detects anomalies in the shot peening device 1 based on time series data of these parameter values ​​and arc height values.

[0027] The anomaly detection device 10 will be described with reference to Figures 1 and 2. Figure 2 is a block diagram showing the functional configuration of the anomaly detection device 10. As shown in Figure 2, the anomaly detection device 10 includes a processing condition measurement unit 50, an arc height measurement unit 52, a transmission unit 54, and a control device 60.

[0028] The processing condition measuring unit 50 includes various sensors for measuring the processing conditions of the shot peening apparatus 1, and measures parameter values ​​related to the processing conditions of the shot peening apparatus 1 during the trial shot peening by the various sensors. Examples of the parameter values ​​related to the processing conditions include the pressure value of the compressed air supplied from the compressor 18 (hereinafter referred to as the "original pressure value"), the internal pressure value of the pipe 22 upstream of the air pressure regulating valve 32 (hereinafter referred to as the "primary pressure value"), the internal pressure value of the pipe 22 downstream of the air pressure regulating valve 32 (hereinafter referred to as the "secondary pressure value"), the flow rate of the compressed air flowing through the pipe 22, and the amount of the projection material S sprayed from the nozzle 20 (hereinafter referred to as the "projection amount"). The processing condition measuring unit 50 includes an original pressure measuring device 50A, a primary pressure measuring device 50B, a secondary pressure measuring device 50C, a flow rate measuring device 50D, and a projection amount measuring device 50E as sensors for measuring these parameter values.

[0029] The source pressure measuring device 50A is a pressure sensor that measures the pressure of the compressed air, and is provided in the pipe 22 at a position upstream of the air pressure regulating valve 32. The primary side pressure measuring device 50B is a pressure sensor that measures a primary side pressure value, and is provided in the pipe 22 at a position upstream of the air pressure regulating valve 32. The secondary side pressure measuring device 50C is a pressure sensor that measures a secondary side pressure value, and is provided in the pipe 22 at a position downstream of the air pressure regulating valve 32. The flow rate measuring device 50D is a flow rate sensor that measures the flow rate of the compressed air flowing through the pipe 22, and is provided in the pipe 22 at a position upstream of the air pressure regulating valve 32.

[0030] The projection amount measuring device 50E is, for example, an AE sensor (acoustic emission sensor) that measures elastic waves, and measures the projection amount of the projection material S. The projection amount measuring device 50E is attached to the nozzle 20, for example, and measures the projection amount of the projection material S by analyzing the measured elastic waves. Note that the projection amount measuring device 50E may be a sensor other than the AE sensor as long as it is possible to measure the projection amount of the projection material S.

[0031] The shot peening apparatus 1 performs practice shot peening under preset processing conditions, but the actual processing conditions (e.g., source pressure value, primary pressure value, secondary pressure value, compressed air flow rate, and shot amount) vary from the preset processing conditions. The parameters related to the processing conditions measured by the processing condition measuring unit 50 are actual values ​​of the processing conditions of the shot peening apparatus 1 measured by various sensors.

[0032] The arc height measuring unit 52 measures an arc height value that indicates the amount of distortion caused in a test piece by the impact of a projectile when the practice shot peening is performed by the shot peening device 1. As shown in FIG. 1, the arc height measuring unit 52 has a test piece 52A and a dial gauge 52B. The test piece 52A is a rectangular metal piece for measuring the arc height value, and is also called an almen strip. The test piece 52A is curved by the impact of the projectile S during the practice shot peening. The dial gauge 52B measures the difference in the amount of distortion (warping amount) of the test piece 52A before and after the practice shot peening, and measures the arc height value from the difference in the amount of distortion. The arc height value is an actual measurement value that indicates the peening intensity of the practice shot peening.

[0033] As shown in FIG. 2, the transmission unit 54 has a plurality of communication devices 54A, 54B, 54C, 54D, 54E, and 54F. The plurality of communication devices 54A to 54F are communication modules capable of wireless communication with the control device 60, and are connected to the base pressure measuring device 50A, the primary pressure measuring device 50B, the secondary pressure measuring device 50C, the flow rate measuring device 50D, the projection amount measuring device 50E, and the arc height measuring unit 52, respectively. The plurality of communication devices 54A to 54F acquire various parameter values ​​measured by the base pressure measuring device 50A, the primary pressure measuring device 50B, the secondary pressure measuring device 50C, the flow rate measuring device 50D, and the projection amount measuring device 50E, and the arc height value measured by the arc height measuring unit 52 as digital data, and transmit the digital data to the control device 60 by wireless communication. The plurality of communication devices 54A to 54F may be connected to the control device 60 by cables, and may transmit the digital data acquired by wired communication to the control device 60.

[0034] The control device 60 is a computer equipped with a processor, a storage unit, an input device, a display device, a communication device, etc., and controls the operation of the entire anomaly detection device 10. The control device 60, for example, loads a program stored in the storage unit and executes the loaded program in the processor to realize various functions described below. The control device 60 may also function as a sequencer that controls the operation of the shot peening apparatus 1. In this case, the control device 60 allows an operator to use the input device to input commands to manage the shot peening apparatus 1, and also allows the display device to visualize and display the operating status of the shot peening apparatus 1.

[0035] The control device 60 is communicably connected to the multiple communication devices 54A to 54F and the user terminal 100. The control device 60 collects parameter values ​​and arc height values ​​related to the processing conditions of the shot peening device 1, and detects an abnormality in the shot peening device 1 based on time-series data of the parameter values ​​and the arc height values.

[0036] The control device 60 has, as functional components, a receiving unit 61, a saving unit 62, a time-series data generating unit 63, an analyzing unit 64, an anomaly detecting unit 65, an alarm unit 66, an output unit 67, and a memory unit 68. The receiving unit 61 receives various parameter values ​​measured by the machining condition measuring unit 50 and the arc height value measured by the arc height measuring unit 52 from the multiple communication devices 54A to 54F.

[0037] The saving unit 62 generates measurement data 70 that associates the arc height value and parameter value received by the receiving unit 61 with the date and time of the rehearsal shot peening, and saves the measurement data 70 in the memory unit 68. The measurement data 70 is generated for each of the various parameter values ​​and the arc height value. The memory unit 68 also stores measurement data related to the arc height value and parameter value acquired during the past rehearsal shot peening.

[0038] The time series data generating unit 63 generates time series data 72 of arc height values ​​and time series data 74 of parameter values ​​based on the measurement data 70. For example, the time series data generating unit 63 sorts and integrates the measurement data 70 related to the arc height values ​​in the order of the date and time of the practice shot peening to generate the time series data 72 of the arc height values. Therefore, the time series data 72 of the arc height values ​​includes a plurality of arc height values ​​measured during a certain period of time in the past.

[0039] Similarly, the time-series data generating unit 63 generates time-series data 74 of parameter values ​​by sorting and integrating the measurement data 70 of parameter values ​​in the order of the date and time of the practice shot peening. As described above, when the parameter values ​​of the processing conditions are measured as the source pressure value, the primary pressure value, the secondary pressure value, the flow rate of compressed air, and the projection amount, time-series data 74 is generated for each of the source pressure value, the primary pressure value, the secondary pressure value, the flow rate of compressed air, and the projection amount. Therefore, the time-series data 74 of parameter values ​​includes a plurality of parameter values ​​measured during a certain period in the past. The time-series data generating unit 63 stores the generated time-series data 72 and time-series data 74 in the storage unit 68.

[0040] The analysis unit 64 analyzes the time series data 72 of the arc height values, and calculates the average value Avr and the standard deviation σ of the multiple arc height values ​​included in the time series data 72. Similarly, the analysis unit 64 analyzes the time series data 74 of the parameter values, and calculates the average value Avr and the standard deviation σ of the multiple parameter values ​​included in the time series data 74.

[0041] The abnormality detection unit 65 determines whether or not an abnormality has occurred in the shot peening apparatus 1, based on the time series data 72 of the arc height values ​​and the time series data 74 of the parameter values. Specifically, the abnormality detection unit 65 determines whether or not the time series data 72 and the time series data 74 satisfy any one of the following alarm conditions 1 to 8.

[0042] Alarm condition 1: The parameter value or arc height value is greater than or equal to Avr+3σ, or less than Avr-3σ. Alarm condition 2: The parameter value or arc height value increases or decreases for six consecutive points. Alarm condition 3: The parameter value or arc height value is above or below Avr for nine consecutive points. Alarm condition 4: The parameter value or arc height value increases and decreases alternately for 14 consecutive points. Alarm condition 5: Two out of three consecutive parameter or arc height values ​​are within the range of Avr+2σ or more, or within the range of Avr-2σ or less. Alarm condition 6: Four out of five consecutive parameter or arc height values ​​are within the range of Avr+σ or greater, or within the range of Avr-σ. Alarm condition 7: The parameter value or arc height value is within the range of Avr-σ or more and less than Avr+σ for 15 consecutive points. Alarm condition 8: The parameter value or arc height value is within the area equal to or greater than Avr+σ or less than Avr-σ for eight consecutive points.

[0043] Specific examples of alarm conditions, ie, alarm conditions 1 to 8, will be described in detail below with reference to FIGS. 3 to 10. However, the alarm conditions are not limited to the following alarm conditions 1 to 8.

[0044] 3 to 10 show an example of time-series data 72 of the arc height value. In FIG. 3 to FIG. 10, the graph region is classified into a region 201, a region 202, a region 203, and a region 204. The region 201 is a region where the arc height value is equal to or more than Avr-σ and less than Avr+σ. The region 202 is a region where the arc height value is equal to or more than Avr-2σ and less than Avr-σ, or equal to or more than Avr+σ and less than Avr+2σ. The region 203 is a region where the arc height value is equal to or more than Avr-3σ and less than Avr-2σ, or equal to or more than Avr+2σ and less than Avr+3σ. The region 204 is a region where the arc height value is less than Avr-3σ, or equal to or more than Avr+3σ.

[0045] <Alarm condition 1> As described above, the anomaly detection unit 65 determines that an anomaly has occurred when the parameter value or the arc height value is equal to or greater than Avr+3σ or less than Avr-3σ. In other words, when the parameter value or the arc height value is included in the region 204, it is determined that the alarm condition 1 is established.

[0046] 3, the arc height value, which is within the range of the ±3σ section until time T11, exceeds +3σ at time T11 and reaches region 204. Therefore, in this example, the anomaly detection unit 65 determines that alarm condition 1 is established at the timing when the arc height value at time T11 is acquired.

[0047] <Alarm condition 2> The anomaly detection unit 65 determines that an anomaly has occurred when the parameter value or the arc height value increases or decreases for six consecutive points. Fig. 4 shows another example of the time series data 72 of the arc height value. In the example shown in Fig. 4, the arc height value increases for six consecutive points from time T21 to time T22. In this example, the anomaly detection unit 65 determines that the alarm condition 2 has been established at the timing when the arc height value at time T22 is acquired.

[0048] <Alarm condition 3> The anomaly detection unit 65 determines that an anomaly has occurred in the shot peening apparatus 1 when the parameter value or the arc height value exceeds or falls below the average value Avr for nine consecutive points. FIG. 5 shows another example of the time-series data 72 of the arc height value. In the example shown in FIG. 5, nine consecutive points of the arc height value from time T31 to time T32 exceed the average value Avr of the arc height value. Therefore, in this example, the anomaly detection unit 65 determines that the alarm condition 3 is established at the timing when the arc height value at time T32 is acquired.

[0049] <Alarm condition 4> The anomaly detection unit 65 determines that an anomaly has occurred in the shot peening apparatus 1 when the parameter value or the arc height value alternately increases and decreases for 14 consecutive points. Fig. 6 shows another example of the time-series data 72 of the arc height value. In the example shown in Fig. 6, the arc height value alternately increases and decreases for 14 consecutive points from time T41 to time T42. Therefore, in this example, the anomaly detection unit 65 determines that the alarm condition 4 is established at the timing when the arc height value at time T42 is acquired.

[0050] <Alarm condition 5> The anomaly detection unit 65 determines that an anomaly has occurred in the shot peening apparatus 1 when two of three consecutive parameter values ​​or arc height values ​​are included in the region of Avr+2σ or more or the region of less than Avr-2σ. That is, it is determined that the alarm condition 5 is established when two of three consecutive parameter values ​​or arc height values ​​are included in the region 203 or the region 204. FIG. 7 shows another example of the time series data 72 of the arc height value. In the example shown in FIG. 7, the two arc height values ​​measured at the times T52 and T53 out of the three arc height values ​​measured at the times T51, T52, and T53 are included in the region 203. Therefore, in this example, the anomaly detection unit 65 determines that the alarm condition 5 is established at the timing when the arc height value at the time T53 is acquired.

[0051] <Alarm condition 6> The anomaly detection unit 65 determines that an anomaly has occurred in the shot peening apparatus 1 when four out of five consecutive parameter values ​​or arc height values ​​are included in the region of Avr+σ or more, or in the region of less than Avr-σ. That is, it is determined that the alarm condition 6 has been established when four out of five consecutive parameter values ​​or arc height values ​​are included in the region 202, the region 203, or the region 204. FIG. 8 shows another example of the time series data 72 of the arc height value. In the example shown in FIG. 8, two arc height values ​​measured at times T61, T62, T63, T64, and T65 out of five arc height values ​​measured at times T61, T62, T63, and T65 are included in the region 202 or the region 203. Therefore, in this example, the anomaly detection unit 65 determines that the alarm condition 6 has been established at the timing when the arc height value at time T65 is acquired.

[0052] <Alarm condition 7> The anomaly detection unit 65 determines that an anomaly has occurred in the shot peening apparatus 1 when 15 consecutive points of the parameter value or the arc height value are included in the region of Avr-σ or more and less than Avr+σ. That is, when 15 consecutive points of the parameter value or the arc height value are included in the region 201, it is determined that the alarm condition 7 is established. FIG. 9 shows another example of the time series data 72 of the arc height value. In the example shown in FIG. 9, 15 consecutive points of the arc height value measured from time T71 to time T72 are included in the region 201. Therefore, in this example, the anomaly detection unit 65 determines that the alarm condition 7 is established at the timing when the arc height value at time T72 is acquired.

[0053] <Alarm condition 8> The anomaly detection unit 65 determines that an anomaly has occurred in the shot peening apparatus 1 when eight consecutive points of the parameter value or the arc height value are included in the region of Avr+σ or more, or the region of less than Avr-σ. That is, when eight consecutive points of the parameter value or the arc height value are included in the region 202, the region 203, or the region 204, it is determined that the alarm condition 8 has been established. FIG. 10 shows another example of the time series data 72 of the arc height value. In the example shown in FIG. 10, eight consecutive points of the arc height value measured from time T81 to time T82 are included in the region 202 or the region 203. Therefore, in this example, the anomaly detection unit 65 determines that the alarm condition 8 has been established at the timing when the arc height value at time T62 is acquired.

[0054] Although a specific example has been described in which the time series data 72 of the arc height values ​​satisfies the alarm conditions 1 to 8, the anomaly detection unit 65 also determines that an anomaly has occurred in the shot peening apparatus 1 when the time series data 74 of the parameter values ​​satisfies the alarm conditions 1 to 8.

[0055] The alarm unit 66 outputs alert information when an abnormality is detected in the shot peening apparatus 1 by the abnormality detection unit 65. For example, the alarm unit 66 outputs alarm information indicating that an abnormality has been detected in the shot peening apparatus 1 to the output unit 67 when any one of the above-mentioned alarm conditions 1 to 8 is satisfied. The alarm unit 66 may output alarm information when two or more of the above-mentioned alarm conditions 1 to 8 are satisfied. The alarm information may include information specifying which alarm condition among the alarm conditions 1 to 8 has been satisfied, and information indicating the date and time when the alarm condition was satisfied.

[0056] The output unit 67 transmits the time series data 72 of the arc height values ​​and the time series data 74 of the parameter values ​​to the user terminal 100, for example, by wireless communication. The user terminal 100 is an information terminal used by an operator of the shot peening apparatus 1. Examples of the user terminal 100 include desktop computers, notebook computers, smartphones, and tablet terminals. The user terminal 100 receives the time series data 72, 74 and visually displays the time series data, for example, in a graph format. This makes it possible to grasp the time series transitions of the parameter values ​​and the arc height values ​​at a glance.

[0057] Furthermore, when alarm information is output by the warning unit 66, the output unit 67 transmits the alarm information to the user terminal 100 in addition to the time-series data 72, 74. The user terminal 100 displays information specifying the established alarm condition and information indicating the date and time when the alarm condition was established, in association with the time-series data 72, 74. This allows the operator using the user terminal 100 to be notified of any abnormality in the shot peening apparatus 1 at an early stage.

[0058] As described above, in the anomaly detection device 10 according to the embodiment, when shot peening is performed, the arc height value and the parameter value related to the processing conditions are measured. The arc height value measured by the arc height measurement unit 52 is the amount of distortion caused in the test piece 52A by actually performing shot peening on the test piece 52A, and is a highly accurate measured value. Therefore, by using the measured arc height value and parameter value, an anomaly in the shot peening device 1 can be detected with high accuracy. Furthermore, since the anomaly detection device 10 uses the time series data 72, 74 of the arc height value and the parameter value, an anomaly can be detected early when a sign of an anomaly appears by analyzing the trend of the time series data 72, 74.

[0059] Next, a method for detecting an abnormality in the shot peening apparatus 1 using the above-mentioned abnormality detection device 10 will be described. Fig. 11 is a flowchart showing the method for detecting an abnormality in the shot peening apparatus 1.

[0060] In this method, first, the shot peening device 1 blasts a shot material S onto the test piece 52A of the arc height measuring section 52 (step ST1). This step ST1 is a trial shot peening carried out on a trial basis before shot peening of the treatment object.

[0061] Next, the arc height value is measured by the arc height measuring unit 52 during the rehearsal shot peening (step ST2). Also, parameter values ​​related to the processing conditions of the shot peening apparatus 1 are measured by the processing condition measuring unit 50 during the rehearsal shot peening (step ST3). Next, the multiple communication devices 54A to 54F transmit the arc height value measured by the arc height measuring unit 52 and various parameter values ​​measured by the processing condition measuring unit 50 to the control device 60 (step ST4).

[0062] Next, the receiving unit 61 of the control device 60 receives the arc height value and various parameter values, and the storage unit 62 of the control device 60 stores these arc height values ​​and various parameter values ​​as measurement data 70 (step ST5). Next, the time series data generating unit 63 of the control device 60 generates time series data 72, 74 related to the arc height value and the parameter values ​​(step ST6).

[0063] Next, the output unit 67 transmits the time series data 72, 74 relating to the arc height value and the parameter value to the user terminal 100 (step ST7). As a result, the time series data 72, 74 relating to the arc height value and the parameter value are displayed on the user terminal 100.

[0064] Next, the anomaly detection unit 65 judges whether or not an alarm condition is established based on the time series data 72, 74 (step ST8). For example, the anomaly detection unit 65 judges whether or not any of the above-mentioned alarm conditions 1 to 8 is established based on the time series data 72, 74 related to the arc height value and the parameter value. If any of the alarm conditions 1 to 8 is established, the warning unit 66 outputs alarm information indicating that an anomaly has occurred in the shot peening apparatus 1. Then, the output unit 67 transmits the alarm information to the user terminal 100 (step ST9). By displaying this alarm information on the user terminal 100, the operator of the shot peening apparatus 1 can be notified of the anomaly at an early stage and the shot peening apparatus 1 can be maintained. As a result, the processing object can be shot peened at a desired peening intensity. On the other hand, if the alarm condition is not established, the processing is terminated.

[0065] The anomaly detection device and the method for detecting an anomaly in a shot peening device according to various embodiments have been described above. However, the invention is not limited to the above-described embodiments and various modifications can be made without departing from the spirit and scope of the invention.

[0066] For example, in the above-described embodiment, the source pressure value, the primary pressure value, the secondary pressure value, the flow rate of compressed air, and the projection amount are measured as parameter values ​​to be measured, but at least one of the source pressure value, the primary pressure value, the secondary pressure value, the flow rate of compressed air, and the projection amount may be measured as a parameter value. Also, parameter values ​​related to other processing conditions may be measured. Also, the above-described various embodiments can be combined within a range that does not cause inconsistencies. [Explanation of symbols]

[0067] 1...shot peening apparatus, 10...anomaly detection device, 18...compressor, 20...nozzle, 22...piping, 32...air pressure regulating valve, 50...processing condition measurement unit, 52...arc height measurement unit, 52A...test piece, 54...transmission unit, 60...control device, 61...reception unit, 62...storage unit, 65...anomaly detection unit, 66...alarm unit, 67...output unit, 72, 74...time series data, 100...user terminal.

Claims

1. An abnormality detection device for detecting an abnormality in a shot peening device, A control device; an arc height measuring unit that measures an arc height value that indicates an amount of distortion generated in the test piece when the shot peening is performed on the test piece by the shot peening device; a processing condition measurement unit for measuring parameter values ​​related to processing conditions of the shot peening apparatus when the test piece is shot peened; A transmission unit that transmits the arc height value and the parameter value to the control device; Equipped with The control device includes: A receiving unit that receives the arc height value and the parameter value; a storage unit that stores the arc height value and the parameter value in association with a date and time of the shot peening; an anomaly detection unit that determines whether or not an anomaly has occurred in the peening apparatus based on a trend of time series data of the arc height value and the parameter value; having the processing condition measurement unit includes a sensor for measuring the processing conditions of the shot peening apparatus, and the parameter value is an actual measurement value of the processing conditions of the shot peening apparatus measured by the sensor. Anomaly detection device.

2. The anomaly detection device according to claim 1 , wherein the transmission unit transmits the arc height value and the parameter value to the control device by wireless communication.

3. The anomaly detection device according to claim 1 , wherein the control device further includes an alarm unit that outputs alert information when an anomaly is detected in the shot peening device.

4. The anomaly detection device according to claim 3 , wherein the control device further includes an output unit that transmits the time-series data of the arc height value and the parameter value, and the alert information to a user terminal.

5. the shot peening device includes a compressor that supplies compressed air, a nozzle that injects a shot material using the compressed air, a pipe that connects the compressor and the nozzle, and an air pressure regulating valve that is provided in the pipe and that regulates the pressure of the compressed air supplied to the nozzle, The anomaly detection device according to any one of claims 1 to 4, wherein the parameter values ​​measured by the processing condition measurement unit include any one of a pressure value of the compressed air supplied from the compressor, an internal pressure value of the piping upstream of the air pressure regulating valve, an internal pressure value of the piping downstream of the air pressure regulating valve, and an amount of projection material sprayed from the nozzle.

6. A method for detecting anomalies in a shot peening apparatus, comprising: performing shot peening on a test piece using the shot peening device; measuring an arc height value that represents an amount of distortion caused in the test piece by the shot peening; measuring parameter values ​​related to processing conditions of the shot peening apparatus when the shot peening is performed; storing the arc height value and the parameter value in association with the date and time of the shot peening; determining whether or not there is an abnormality in the shot peening apparatus based on a trend in time series data of the arc height value and the parameter value; Including, The parameter value is an actual value of the processing condition of the shot peening apparatus measured by a sensor that measures the processing condition of the shot peening apparatus. method.

7. The shot peening device comprises a compressor for supplying compressed air, a nozzle for spraying a projection material using the compressed air, a pipe connecting the compressor and the nozzle, and an air pressure regulating valve provided in the pipe for regulating the pressure of the compressed air supplied to the nozzle; 7. The method according to claim 6, wherein the parameter value includes any one of a pressure value of the compressed air supplied from the compressor, an internal pressure value of the piping upstream of the air pressure regulating valve, an internal pressure value of the piping downstream of the air pressure regulating valve, and an amount of the projection material sprayed from the nozzle.

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