JP7528045B2 - High-pressure fluid processing apparatus and method for diagnosing the health of high-pressure fluid processing apparatus - Google Patents

Description

The present invention relates to a high-pressure fluid processing device and a method for diagnosing the health of a high-pressure fluid processing device.

Conventionally, in order to smoothly perform maintenance or respond to breakdowns in production equipment such as machine tools, detection values are obtained using detection means such as various sensors while the production equipment is in operation. Then, it is common to detect abnormalities when the detection value exceeds a threshold and respond when a problem occurs. In recent years, the Internet of Things (IoT) has become widespread, and remote monitoring using personal computers (PCs), mobile terminals, etc. has become practical.

For example, Patent Document 1 discloses an abnormality diagnosis system for pump equipment that includes a data set acquisition unit, a deviation index value calculation unit, an abnormality determination unit, a cause identification unit, and a countermeasure data output unit.
Here, the dataset acquisition unit acquires a dataset consisting of a combination of multiple indexes that are correlated with the operating state of the pump facility.
The deviation index value calculation unit calculates a deviation index value indicating a deviation between a reference data set, which is made up of a combination of a plurality of indexes when the pump equipment is in a normal state, and an actual data set.

When the deviation index value exceeds a threshold value, the abnormality determination unit determines that there is a symptom of an abnormality in the pump equipment.
When it is determined that there is an abnormality symptom in the pump equipment, the cause identifying unit identifies a cause of the abnormality symptom based on the contribution of each of the multiple indexes to the deviation index value.
The countermeasure data output unit outputs countermeasure data that is previously associated with the cause identified by the cause identification unit.

JP 2019-178625 A

However, although Patent Document 1 detects the suction pressure and discharge pressure of the pump to diagnose abnormalities, it places emphasis on the operating state of the pump. As a result, there is no mention of pressurizing the fluid using the pump while maintaining a pressurized state in the entire system, and spraying the pressurized fluid onto the workpiece to perform cleaning or cutting.

For example, when operating a water jet cutting device that uses pressurized water, the pressure of the fluid used in the cutting process reaches 200 to 700 MPa. In that case, it is necessary to maintain a specified standard pressure not only in the pump but also in the entire device or the main components for spraying the pressurized fluid (water jet). In other words, not only is the operating state of the pump as described in Patent Document 1 maintained, but also no consideration is given to maintaining the pressurized fluid at a specified standard pressure, particularly in the high pressure range, while the water jet cutting device is in operation.

In addition, in Patent Document 1, the cause of an abnormal symptom is identified based on the contribution of each of multiple indexes to the deviation index value. Therefore, the more indexes there are, the more accurate the predictive diagnosis can be. However, this creates problems such as the complexity of the correlations and contributions of the indexes becoming more diverse, using more memory space for processing, and placing an excessive load on communication devices, servers, etc.

Furthermore, in the case of equipment that uses fluids, such as water jet cutting equipment, the various effects of the fluid are often difficult to estimate through visual inspection alone. For this reason, when a breakdown or malfunction occurs, countermeasures are often taken based on many years of experience and knowledge. There is a demand for equipment and countermeasures that can perform appropriate health diagnosis for the causes of breakdowns and malfunctions specific to the use of such fluids (such as failure to obtain the specified pressure or clogging of the abrasive).

The present invention was devised in light of the above situation, and aims to provide a high-pressure fluid processing device that can stabilize processing accuracy and a method for diagnosing the health of a high-pressure fluid processing device.

In order to solve the above-mentioned problems, the high-pressure fluid processing apparatus of the present invention comprises a high-pressure pump which generates a pressurized fluid, a pressurized fluid supply unit which supplies the pressurized fluid , a hydraulic unit which drives the high-pressure pump, a nozzle head which sprays the pressurized fluid, an abrasive supply means which supplies an abrasive, a detection means which has at least one detection sensor disposed in the high-pressure pump, the nozzle head or the abrasive supply means, and based on detection data from the detection means, keeps the supply pressure or discharge pressure of the high-pressure pump, the pressurized fluid supply unit , the hydraulic unit and the nozzle head increased or maintained, thereby achieving 100% high-pressure processing. The system is equipped with a health diagnosis means which diagnoses the health before a failure occurs while maintaining a processing pressure of 700 MPa or less, and a processing condition control unit which controls the processing conditions based on detection data from the detection means, wherein the health diagnosis means diagnoses the health by monitoring a numerical condition score based on a combination of data acquired by the detection means against a predetermined health standard, and the processing condition control unit controls the processing conditions using any of the cutting program, the set cutting speed, cutting parameters including information on the material of the workpiece and the cutting quality, and the calculated cutting speed based on the health diagnosis results.

The health diagnosis method of the present invention is a method for diagnosing the health of a high-pressure fluid processing apparatus comprising a high-pressure pump that generates a pressurized fluid, a pressurized fluid supply unit that supplies the pressurized fluid, a hydraulic unit that drives the high-pressure pump, a nozzle head that sprays the pressurized fluid, an abrasive supply means that supplies an abrasive, at least one detection means disposed in the high-pressure pump, the nozzle head, or the abrasive supply means, an acquisition unit, a diagnosis unit, and a processing condition control unit, the method including an acquisition step in which the acquisition unit acquires detection data by the detection means, and a diagnosis unit that determines the health of the high-pressure pump, the pressurized fluid supply unit, and a processing condition control unit based on the detection data. The system includes a diagnosis process for diagnosing the soundness of the cutting tool before a failure occurs by monitoring a numerical condition score based on a combination of data acquired by the detection means while maintaining the supply pressure or discharge pressure of the nozzle head, hydraulic unit, and nozzle head in an increased or maintained state to maintain a processing pressure of 100 to 700 MPa, and a processing condition control process for controlling the processing conditions by the processing condition control unit using any of a cutting program, a set cutting speed, cutting parameters including information on the material of the workpiece and cutting quality, and a calculated cutting speed based on the detection data.

The present invention provides a high-pressure fluid processing device that can stabilize the processing accuracy of cutting and other processes, and a method for diagnosing the health of a high-pressure fluid processing device.

1 is a schematic diagram of a high-pressure water processing apparatus according to an embodiment of the present invention; 4A is a configuration diagram of a detection means of the high-pressure water processing apparatus of the embodiment, and FIG. 4B is a configuration diagram of a soundness diagnosis means of the high-pressure water processing apparatus of the embodiment. FIG. 4A is a diagram showing an example of a method for measuring the amount of drainage, and FIG. 4B is a diagram showing another example of a method for measuring the amount of drainage. FIG. 4 is a diagram showing a display of a state monitoring unit according to the embodiment. FIG. 2 is a diagram showing the configuration of a remote control unit according to the embodiment. 1 is a diagram showing a health diagnosis method according to an embodiment;

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings as appropriate.
FIG. 1 shows a schematic diagram of a high-pressure water processing apparatus 1 according to an embodiment of the present invention.
The high-pressure water processing apparatus 1 of the embodiment is an apparatus for spraying high-pressure water (pressurized fluid) L onto a workpiece W to be processed.
The high-pressure water processing equipment 1 comprises a high-pressure pump 2, a water supply unit 3, a hydraulic unit 4, a nozzle head 5, an abrasive supply means 7, a detection means 8, a health diagnosis means 9, a remote control means 11, and a processing condition control unit 15.

The high-pressure pump 2 is a pump that generates high-pressure water L to be sprayed from the nozzle head 5 onto the workpiece W. The high-pressure pump 2 has a cylinder 2a1 and a plunger 2a2, and has a booster 2a that pressurizes the pressurized fluid (water) to a predetermined high pressure.
The high-pressure pump 2 generates high-pressure water (pressurized fluid) L by pressurizing the pressurized fluid (water) supplied from the water supply unit 3 by reciprocating a plunger 2a2 within a cylinder 2a1 of the booster 2a.

The water supply unit 3 is a water supply pump for supplying source water to the high-pressure pump 2 which generates the high-pressure water L.
The pressurized fluid (L) is a fluid including pure water, water, other liquids, etc. A commercially available water pump can be used.

The hydraulic unit 4 is a hydraulic pump for driving the plunger 2a2 of the high-pressure pump 2. A commercially available hydraulic pump can be used.

The nozzle head 5 is a head that constitutes a cutting device that sprays high-pressure water L to cut a workpiece W with the high-pressure water L. The nozzle head 5 has a nozzle 6. The nozzle 6 is a nozzle having an orifice in the center through which the high-pressure water L passes.
The nozzle head 5 sprays the high-pressure water L generated by the high-pressure pump 2 from the nozzle 6 onto the workpiece W.
The abrasive supplying means 7 supplies an abrasive to the nozzle head 5. Garnet, _alumina ( _Al2O3 ), etc. are used as the abrasive. The abrasive supplying means 7 has an abrasive tank 7a and a regulator 7b. The abrasive stored in the abrasive tank 7a is supplied to the nozzle 6 in the nozzle head 5 at a constant speed and amount by the regulator 7b.

When processing is performed using only high-pressure water L, a nozzle 6 for the high-pressure water L is used. On the other hand, when mixing not only the high-pressure water L but also the abrasive supplied from the abrasive supply means 7 using the nozzle head 5, a nozzle for mixing the abrasive is provided in addition to the nozzle 6 for the high-pressure water L.

<Detection Means 8>
Fig. 2(a) shows a configuration diagram of the detection means 8 of the high-pressure water processing apparatus 1 of the embodiment. Fig. 2(b) shows a configuration diagram of the soundness diagnosis means 9 of the high-pressure water processing apparatus 1 of the embodiment.
The detection means 8 detects data of the high pressure pump 2, the water supply unit 3, the hydraulic unit 4, the nozzle head 5, the abrasive supply means 7, etc. shown in FIG.
The detection means 8 includes, for example, a pump detection sensor 8A, a water supply detection sensor 8B, a nozzle detection sensor 8C, an abrasive detection sensor 8D, a drain detection sensor 8E, and the like.

1 , the pump detection sensor 8A measures the pressure of the high-pressure water L supplied from the high-pressure pump 2. The water supply detection sensor 8B measures the supply pressure and discharge flow rate of the high-pressure water L supplied from the water supply unit 3. The nozzle detection sensor 8C measures the discharge pressure and wear state of the high-pressure water L sprayed from the nozzle 6. The abrasive detection sensor 8D measures the amount of abrasive supplied from the abrasive supply means 7.
The drain detection sensor 8E measures the amount of cooling water drained from the packing 2p.

Other detection means 8 include, for example, pressure, drainage, operation (ON/OFF, rotation speed, etc.), temperature, and vibration sensors.
The detection data D1 by the detection means 8 includes the supply pressure or discharge pressure of the hydraulic unit 4, the supply pressure or discharge pressure and discharge flow rate of the water supply unit 3, the rotation speed or switching time of the booster 2a, or the abrasive supply amount of the abrasive supply means 7. Therefore, at least one of the above detection values can be selected as the detection data D1. In other words, the detection data D1 can be arbitrarily selected and used depending on the detection means 8 to be provided.

As the pump detection sensor 8A disposed in the high-pressure pump 2 shown in FIG. 1, a first pressure detection sensor 8a1 is disposed in the high-pressure pump 2, so that the discharge pressure of the high-pressure water L from the high-pressure pump 2 can be detected.
As the water supply detection sensor 8B to be disposed in the water supply unit 3, by disposing a first drainage detection sensor 8b1 in the water supply unit 2, the amount of fluid L discharged from the water supply unit 2 can be detected.

In addition, the hydraulic unit 4 can detect the oil discharge pressure and discharge amount by arranging a second pressure detection sensor 8a2 and a second oil discharge detection sensor 8b2, similar to the pump detection sensor 8A and water supply detection sensor 8B.

The nozzle detection sensor 8C, which is not shown in the figure, is placed in the nozzle head 5 shown in Figure 1 and detects the spray pressure of the nozzle 6 for the high-pressure water L and the nozzle for mixing abrasives, as well as the wear state based on image data. This determines whether the pressure state in the nozzle head 5 is being maintained, etc.

The abrasive detection sensor 8D disposed in the abrasive supplying means 7 shown in FIG. 1 detects the amount of abrasive in the abrasive tank 7a, the amount of abrasive supplied and the discharge pressure in the regulator 7b, and the like.
The health diagnostic means 9 judges whether the pressure state in the abrasive supply means 7 is being maintained, etc., based on the detected values of the abrasive supply amount, the discharge pressure, etc.

<Drain detection sensor 8E>
1, a packing 2p for sealing between a cylinder 2a1 and a plunger 2a2 is provided in the booster 2a of the high-pressure pump 2. Cooling water flows through the packing p2 to be cooled.
However, in the past, when the amount of drainage flowing from top to bottom was measured by a drain detection sensor, there were cases where the correct amount of drainage was not measured. In other words, there was a possibility that the measurement value of the drain detection sensor would vary.

Therefore, in this embodiment, the piping through which the drain from the packing 2p flows is designed as shown in Figures 3(a) and (b), and the amount of drain that accumulates from bottom to top is measured by the drain detection sensors 8E1 and 8E2.

Figure 3(a) shows an example of a method for measuring the amount of drainage, and Figure 3(b) shows another example of a method for measuring the amount of drainage.

In FIG. 3(a), the drain ld from the packing 2p flows through the pipes k11, k12, and k13 (arrows α11).
When the drain ld passes through the pipes k11 and k12 and reaches the water level w1 in the pipe k13, the drain detection sensor 8E1 detects the amount of drain.

3B, the drain ld from the packing 2p flows through a pipe k21 and is stored in a drain container y. When the drain ld overflows the drain container y, it flows through an overflow pipe k22 (arrow α12).
When the drain ld stored in the drain container y reaches a water level w2, the drain detection sensor 8E2 detects the amount of drain.

The configurations in Figures 3(a) and 3(b) ensure an appropriate amount of drainage.

<Soundness Diagnosis Means 9>
The soundness diagnostic means 9 shown in FIG. 2B has an acquisition unit 9A, a calculation unit 9B, and a determination unit 9C.
The health diagnostic means 9 monitors the states of the main components in the high-pressure water processing apparatus 1 based on the detection data D1 acquired by the detection means 8. The high-pressure water processing apparatus 1 maintains a specified standard pressure (e.g., a high pressure region of 200 to 700 MPa), thereby stabilizing the processing accuracy of cutting and the like.

The specified standard pressure is the total value (combination) of the pressure values and fluid discharge amounts of the high-pressure pump 2, water supply unit 3, hydraulic unit 4, nozzle head 5, etc., aimed at stabilizing the injection pressure during processing of the workpiece W (satisfying the specified standard pressure).
The total value is set appropriately within the range of 200 to 700 MPa, depending on the conditions of use and processing. The higher the specified standard pressure (total value) is in the high pressure region, the greater the load on each element, such as the high pressure pump 2, the water supply unit 3, the hydraulic unit 4, and the nozzle head 5, and the more difficult it is to keep two or more elements in a stable state.
By increasing or maintaining the water supply pressure and discharge pressure of the high-pressure pump 2, water supply unit 3, hydraulic unit 4, and nozzle head 5, the specified standard pressure (a total value set in the range of 200 to 700 MPa) can be kept from falling below the lower limit, thereby stabilizing the processing accuracy.

For example, when machining a workpiece W with a specified standard pressure of 200 MPa, the allowable ranges of the pressure and discharge values of the high-pressure pump 2, water supply unit 3, and hydraulic unit 4 are set so that the discharge pressure of the nozzle head 5 is maintained at 200 MPa, thereby maintaining integrity and preventing excessive increases or decreases.
In addition, when machining a workpiece with a specified standard pressure of 700 MPa, numerical tolerances are set for the pressure and discharge of each of the high-pressure pump 2, water supply unit 3, and hydraulic unit 4 so that the discharge pressure of the nozzle head 5 is maintained at 700 MPa, thereby maintaining soundness and preventing excessive increases or decreases.
Comparing the cases where the specified standard pressure is 200 MPa and 700 MPa, the load on each element is higher when the standard pressure is 700 MPa, and so in order to be able to adjust the range from 200 to 700 MPa in the same device, the specified standard pressure (total value) is set taking into consideration the resistance and lifespan of the high-pressure pump 2, water supply unit 3, hydraulic unit 4, and nozzle head 5 themselves, as well as the consumables that make them up.

The acquisition unit 9A of the health diagnosis means 9 acquires the detection data D1 from the detection means 8 via a wired or wireless connection. The acquisition unit 9A is equipped with a memory unit 9E and can store the detection data D1 for a certain period of time. Therefore, the acquisition unit 9A can accumulate continuous usage data of the high-pressure water processing device 1. The acquisition unit 9A can be configured not only on the network within the factory where the high-pressure water processing device 1 is installed, but also on an external network with high security effects.

Furthermore, the acquisition unit 9A may include a detection data average calculation unit 9Aa that calculates an average value of the detection data D1. For example, the detection data D1 may be recorded as an average value for one minute based on data for each second during automatic driving. The time period for the average value may be expanded or contracted as necessary.
The pressure range of the high pressure water L used during processing/piercing, the pressure range until pressure rise, etc., fluctuates between 100 and 300 MPa.
For example, when used at 300 MPa, during the pressure increase stage, the pressure rises from a pressure zone lower than 300 MPa, so if data acquisition is focused only on 300 MPa, accurate predictive diagnosis cannot be achieved.

Therefore, instead of a uniform pressure band, average data from a minimum pressure of 100 MPa to a maximum pressure of 300 MPa is obtained, and this value is used for predictive diagnosis.
This makes it possible to stabilize the accuracy of the symptom diagnosis by the health diagnosis means 9.

<Detection data average value calculation unit 9Aa>
The pressure of the high-pressure pump 2 shown in Fig. 1 must be adjusted in order to use the high-pressure water processing device 1 at a processing pressure of 200 to 700 MPa. For example, the power (number of reciprocations, rotation speed, etc.) of the hydraulic unit 4 required to drive the high-pressure pump 2 differs between when the high-pressure water processing device 1 is used at a processing pressure of 200 MPa and when it is used at a processing pressure of 700 MPa. Furthermore, the high-pressure pump 2 is structured to discharge high-pressure water L, and some measure is required to keep the pressure of the high-pressure water L constant depending on the discharge amount and discharge time of the high-pressure water L.

Therefore, the detection data average value calculation unit 9Aa shown in Figure 2(b) uses the average value of the minimum processing pressure and the maximum processing pressure within a specific time as each detection data D1, thereby maintaining the specified standard pressure (e.g., a high pressure range of 200 to 700 MPa) in the high-pressure water processing equipment 1, thereby stabilizing the processing accuracy of cutting, etc.
It goes without saying that the setting can be made to use the average value of the upper and lower limits of the acquired values of the detection data D1, such as the supply pressure or discharge pressure of the hydraulic unit 4 other than the processing pressure of the high-pressure water processing equipment 1, the supply pressure or discharge pressure and discharge flow rate of the water supply unit 3, the rotation speed or switching time of the booster 2a, or the abrasive supply amount of the abrasive supply means 7.

<Cutting judgment unit 9Ab>
Furthermore, the acquisition unit 9A shown in FIG. 2B may include a cutting process time determination unit 9Ab. The cutting process time determination unit 9Ab determines whether the acquisition unit 9A is operating during cutting process by the high-pressure water processing device 1. However, when the high-pressure water processing device 1 is not performing cutting processing, the acquisition unit 9A is controlled not to operate.
When the health diagnosis is always performed, the amount of data acquired, including the detection data D1, becomes enormous. In addition, when the health diagnosis is performed, the acquired data, including the detection data D1, contains a lot of unnecessary information. In addition, when the high-pressure water processing device 1 is not cutting, the detection data D1 is not acquired, and a more accurate health diagnosis can be performed. This reduces the amount of main memory used, which leads to cost reduction.

<Piercing Processing Time Determination Unit 9Ac>
Furthermore, the acquisition unit 9A may include a piercing time determination unit 9Ac. The piercing time determination unit 9Ac prevents the acquisition unit 9A from operating when the high-pressure water processing apparatus 1 is piercing.
For example, when cutting a workpiece W using a high-pressure water processing apparatus 1, particularly when cutting a workpiece W that is not very brittle, a method is often adopted in which a preliminary cut (piercing process) is performed at a pressure lower than the processing pressure at the time of cutting, and then the pressure is increased to the processing pressure at the time of cutting to cut the workpiece W.

In this case, a difference occurs between the processing pressure during cutting and the processing pressure during piercing. However, piercing is merely an operation performed in the preparation stage for the actual cutting process, and is unlikely to affect the soundness diagnosis. Therefore, a configuration is adopted in which detection data D1 is not acquired during piercing, allowing for more accurate soundness diagnosis.

<Calculation unit 9B>
The calculation unit 9B shown in Fig. 2(b) compares the detection data D1 acquired by the acquisition unit 9A with a preset reference value and calculates deviation data D2 (see Fig. 6). The preset reference value is a value that sets the upper limit or lower limit of the allowable range of the detection data D1. The calculation unit 9B calculates whether the deviation data D2 belongs to the range of the reference value, which is the allowable range of the detection data D1, or to the outside of the range.

<Determination unit 9C>
The judgment unit 9C shown in Fig. 2(b) judges the soundness diagnosis result D3 based on the contribution degree set in advance for the deviation data D2 calculated by the calculation unit 9B. The contribution degree is a combination of attributes, namely pressure, drainage, operation (ON/OFF, rotation speed, etc.), temperature, and vibration, acquired by the detection means 8, and is an index for judging the degree (level) of soundness. The high and low levels of the soundness standard can be adjusted by using the contribution degree.

4 shows a display diagram of the condition monitoring unit according to the embodiment, in which the horizontal axis indicates time and the vertical axis indicates a condition score (condition value).
As shown in Fig. 4, a health standard (thick solid line) is determined in advance, and the health is judged by monitoring a numerical condition score (white bar graph) based on a combination of data acquired by the detection means 8 (8A to 8D, etc.). A condition score (state value) lower than the health standard (thick solid line) indicates health.
The determination unit 9C shown in FIG. 2B makes a determination based on the detection data D1.

<Life period determination section 9D>
The lifespan determination unit 9D is also provided. The lifespan determination unit 9D determines the average lifespan of consumables and parts, such as the seal member 2p and the plunger 2a2 of the booster 2a, in advance. The lifespan determination unit 9D is a mechanism for recommending replacement of a component when the usage period of the component reaches a preset lifespan. This allows for the replacement of tools and parts before they reach the end of their life, ensuring smooth and continuous processing without downtime.

In addition, past health diagnosis results D3 are stored in the memory unit 9E. The judgment unit 9C then judges new health diagnosis results D3 in real time, taking into account any failures or replacements.

Based on the above-mentioned health diagnosis result D3, the high-pressure pump 2 shown in FIG. 1 can be switched ON or OFF, or the rotation speed can be adjusted, and feedback control can be performed to prevent the high-pressure water processing device 1 from breaking down or malfunctioning.

<Remote control means 11>
FIG. 5 shows a configuration diagram of the remote control means 11 according to the embodiment.
The remote operation means 11 is operated by an operator remotely via the communication network 10 using a mobile terminal or the like to display the health diagnosis result D3 (see FIG. 2B), which is data determined by the health diagnosis means 9.
Alternatively, the remote control means 11 may be configured near the high-pressure water processing apparatus 1, or may be located within the site where the high-pressure water processing apparatus 1 is installed.

The remote control means 11 shown in FIG. 5 has a status monitoring unit 12, an alarm unit 13, and a consumable replacement unit 14.

In the past, when a high-pressure water processing device broke down, it was necessary to investigate the cause of the breakdown of each element one by one, which took time to resolve the problem. Therefore, expert intuition was required to determine the cause of the breakdown.
Therefore, in the embodiment, the status monitoring unit 12 acquires the discharge pressure of the high-pressure pump 2, the water supply pressure of the water supply unit 3, the cooling water drain amount, and the switching time of the booster 2a, which have a large influence on the cause of a failure, using the detection means 8, and makes them visible.

That is, the status monitoring unit 12 monitors data determined by the health diagnosis means 9, such as pressure, drainage, operation (ON/OFF, rotation speed, etc.), temperature, vibration detection data D1 (see Figure 2(b)), deviation data D2 (see Figure 6), and health diagnosis result D3 (see Figure 2(b)).
This enables early investigation of the cause of a failure.
The display format of the status monitoring unit 12 may be a format in which all information is displayed, a format in which only selected information is displayed, or the like.

The display format of the status monitoring unit 12 is, in principle, various data in real time, but by setting the timing of detection and calculation in advance, it is possible to select a format in which data is updated every 10 minutes, 30 minutes, 60 minutes, 90 minutes, one day, one week, three months, etc., as necessary.

The alarm unit 13 displays an alarm when the health diagnostic means 9 judges the health diagnostic result D3 as a failure or malfunction, or when the life span determination unit 9D (see FIG. 2(b)) judges that the consumable item has reached its life span. The alarm unit 13 can also be set to a certain time longer than the life span.

The part replacement unit 14 is a display unit that displays a list of data related to the alarm display by the alarm unit 13. When the recommended replacement time for a consumable item, part, etc. is reached, a message is displayed indicating that it is recommended to replace the consumable item, part, etc. that is due for replacement.

<Processing condition control unit 15>
The processing condition control unit (control device) 15 shown in FIG. 1 controls the processing conditions of the high-pressure water processing apparatus 1 based on the soundness diagnosis result D3 determined by the soundness diagnosis means 9.
For example, the processing conditions are controlled by using a cutting program (see Patent 6058575), a set cutting speed, cutting parameters including information on the material of the workpiece and the cutting quality, a calculated cutting speed, etc. This makes it possible to select the optimal processing according to the current (real-time) conditions of the actual machine.

The processing condition control unit 15 enables processing control in real time according to the equipment status of the high-pressure water processing device 1 based on the results of the health diagnosis means 9.

<Control of high-pressure water processing device 1>
1 monitors the states of the main components by a health diagnostic means 9. The high-pressure water processing apparatus 1 then sprays the high-pressure water L to process a workpiece while maintaining the high-pressure water L at a specified reference pressure.
The high-pressure water processing apparatus 1 detects various data by the detection means 8, and it is necessary to maintain the pressure of the high-pressure water L at a specified standard and to process the workpiece. Therefore, the high-pressure water processing apparatus 1 can be configured so that the detection data D1 (see FIG. 2(b)) detected and acquired by the detection means 8 (see FIG. 2(a)) can be used by both the soundness diagnosis means 9 and the processing condition control unit 15, so that the high-pressure water processing apparatus 1 can fulfill the functions of the soundness diagnosis means 9 and the processing condition control unit 15.

<Soundness Diagnosis Method>
FIG. 6 shows a health diagnostic method according to the embodiment.
Next, the health diagnostic method according to the embodiment will be described with reference to FIG.

First, the processing condition control unit 15 shown in FIG. 1 starts the high-pressure pump 2, making the high-pressure water processing device 1 ready to operate, and also makes the detection means 8 operational.

<Processes P1 to P5>
Next, detection data D1 is acquired by at least one detection means 8 (8A, 8C, etc.) disposed on the high-pressure pump 2 that generates the high-pressure water L or on the nozzle head 5 that sprays the high-pressure water L (step P1).
Processes P1A, P1B, and P1C will be described later.
Subsequently, in step P2, the calculation unit 9B compares the detection data D1 with a preset reference value and calculates deviation data D2.

While maintaining the processing pressure of 200 to 700 MPa preset by the processing condition control unit 15 shown in Figure 1, the soundness diagnosis means 9 diagnoses the soundness before a failure occurs (step P3).

Next, the machining condition control unit 15 controls the machining conditions (step P4).
For example, the machining conditions are controlled using a cutting program (see Patent 6058575), a set cutting speed, cutting parameters including information on the material of the workpiece and the cutting quality, a calculated cutting speed, etc.

The high-pressure water processing device 1 performs processing on the workpiece W as appropriate with the soundness diagnostic means 9 and processing condition control unit 15 functioning (process P5).

<Process P1A to P1C>
In addition, in the step of acquiring the detection data D1 in the step P1 shown in FIG. 6, the detection data average value calculation unit 9Aa of the acquisition unit 9A shown in FIG. 2B calculates the average value of the upper limit and the lower limit of the detection data D1. Step P1A may also be included.
Even in a situation where the pressure of the high-pressure water L changes between the upper limit (e.g., 500 MPa) and the lower limit (e.g., 100 MPa) of the detection data D1, the detection data average value calculation unit 9Aa calculates the average value. This leads to maintaining the minimum border pressure for maintaining the specified standard pressure, and the operating rate and processing accuracy of the high-pressure water processing device 1 can be stabilized.

Furthermore, the process P1 for acquiring the detection data D1 may include a process P1B for not acquiring the detection data D1 except during cutting processing.
If the detection data D1 were constantly acquired, the amount of information would be enormous and would include noise. Therefore, by not acquiring the detection data D1 except during cutting processing, the soundness diagnosis means 9 can perform a more accurate soundness diagnosis.

For example, when not processing or cleaning, the pressure does not increase, and if data were acquired or predictive diagnosis were performed at this stage, the overall predictive diagnosis results would be unstable. Therefore, predictive diagnosis is not performed when not processing or cleaning. This makes it possible to stabilize the accuracy of predictive diagnosis.

Furthermore, the process P1 for acquiring the detection data D1 may include a process P1C in which the detection data D1 is not acquired during the piercing process.
During piercing (preparation) processing, pre-processing is performed with a pressure lower than the normal processing pressure. However, the state during piercing has little effect on the soundness diagnosis. Therefore, by not acquiring the detection data D1 during piercing, the soundness diagnosis means 9 can perform a more accurate soundness diagnosis.

<Process P6 to P8)>
Furthermore, in a lifespan determination unit 9D shown in FIG. 2B, the average lifespan of consumables, such as the seal member 2p, the plunger 2a2 of the booster 2a, and other parts and various components is preset. The lifespan determination unit 9D determines whether the period of use of the consumables or parts has reached the end of a preset lifespan. If the period of use of the consumables or parts has reached the end of a preset lifespan, A step of recommending replacement (step P6) can be added to the above.

Furthermore, a process (P7) can be added in which past health diagnosis results D3 are stored in the memory unit 9E, and the health diagnosis result D3 is judged to be a new (real-time) health diagnosis result D3 taking into account the fact of a failure or replacement. The process (P7) of judging the real-time health diagnosis result D3 allows the high-pressure water processing device 1 to perform processing or cleaning according to the real-time equipment status.

Furthermore, a process (P8) can be added in which the machining condition control unit (control device) 15 switches the high-pressure pump 2 on or off or adjusts the rotation speed based on the health diagnosis result D3, thereby performing feedback control to prevent breakdowns or malfunctions.
For example, if an abnormality is diagnosed in a consumable or part (such as the sealing member 2p or the plunger 2a2 of the booster 2a) that is the target of the detection data D1 detected by the detection means 8 shown in Figures 1 and 2(b) based on the health diagnosis result D3, if the health diagnosis result D3 (overall evaluation) is "A" on a scale of A to C, feedback is given such that the rotation speed of the high-pressure pump is adjusted by 5%, if it is "B", the rotation speed of the high-pressure pump 2 is adjusted by 10%, and if it is "C", the rotation speed is turned OFF.

Here, the rotation speed of the high-pressure pump 2 is given as an example, but the accuracy of the feedback can be improved by setting the control values and operation/stop of the components of the high-pressure water processing device 1 in advance according to multiple levels of evaluation such as A to C for the pressure, flow rate, discharge amount, etc. of the high-pressure water L.

It goes without saying that the present invention is not limited to the above-mentioned embodiment, and that the present invention can be modified as appropriate without departing from the spirit of the invention.

The above configuration provides a high-pressure water processing device 1 and a method for diagnosing the health of the high-pressure water processing device 1 that can stabilize the processing accuracy of cutting and other processes by monitoring the state of the main components that make up the high-pressure water processing device 1 and maintaining a specified standard pressure (e.g., a high-pressure range of 200 to 700 MPa).

<<Other embodiments>>
1. In the above embodiment, the pressurized fluid is described as being high-pressure water L, but the fluid is not limited to water and may be any fluid.

2. The present invention is not limited to the above-described embodiment and modified configurations, but various modifications and specific forms are possible within the scope of the appended claims.

1. High-pressure water processing equipment (high-pressure fluid processing equipment)
2 High pressure pump 2a Booster 2b Cylinder 3 Water supply unit 4 Hydraulic unit 5 Nozzle head 6 Nozzle 7 Abrasive supply means 7a Abrasive tank 7b Regulator 8 Detection means 8A Pump detection sensor (detection means)
8B Water supply detection sensor (detection means)
8C Nozzle detection sensor (detection means)
8D Abrasive detection sensor (detection means)
8E Drain detection sensor (detection means)
8a Pressure detection sensor 8b Drainage detection sensor 9 Soundness diagnosis means 9A Acquisition unit 9Aa Detection data average value calculation unit 9Ab Cutting processing time judgment unit 9Ac Piercing processing time judgment unit 9Ad
9B Calculation unit 9C Determination unit 9D Life period determination unit 9E Memory unit 10 Communication network 11 Remote control means 12 Status monitoring unit 13 Alarm unit 14 Part replacement unit 15 Processing condition control unit L High pressure water (pressurized fluid)
D1 Detection data D2 Deviation data D3 Soundness diagnosis result P1 Acquisition process P1A Process P1B Process P1C Process

Claims (7)

a high pressure pump generating a pressurized fluid;
a pressurized fluid supply unit for supplying the pressurized fluid ;
a hydraulic unit that drives the high-pressure pump;
A nozzle head that ejects the pressurized fluid;
an abrasive supply means for supplying an abrasive;
a detection means for disposing at least one detection sensor on the high-pressure pump, the nozzle head, or the polishing agent supply means;
a soundness diagnosis means for diagnosing soundness before a failure occurs while maintaining a processing pressure of 100 to 700 MPa by increasing or maintaining the supply pressure or discharge pressure of the high-pressure pump, the pressurized fluid supply unit , the hydraulic unit, and the nozzle head based on detection data from the detection means;
a processing condition control unit that controls processing conditions based on detection data from the detection means,
the health diagnostic means diagnoses health by monitoring a numerical condition score based on a combination of data acquired by the detection means against a predetermined health standard;
The high-pressure fluid processing apparatus is characterized in that the processing condition control unit controls processing conditions by using any one of a cutting program, a set cutting speed, cutting parameters including information on the material of the workpiece and cutting quality, and a calculated cutting speed based on the diagnosis result of the soundness. 2. The high pressure fluid processing apparatus according to claim 1,
The high-pressure fluid processing apparatus, characterized in that the detection data is at least one of the supply pressure or discharge pressure of a hydraulic unit that operates the high-pressure pump, the supply pressure or discharge pressure of a water supply unit, the discharge flow rate of the water supply unit, the rotation speed or switching time of a pressure booster, or the abrasive supply amount of an abrasive supply means. 3. The high-pressure fluid processing apparatus according to claim 1,
The high-pressure fluid processing apparatus, wherein the health diagnostic means has a detection data average calculation unit that calculates an average value of upper and lower limits of the detection data. 2. The high pressure fluid processing apparatus according to claim 1,
The detection means includes a drain detection sensor,
The high-pressure fluid processing apparatus, wherein the drain detection sensor measures an amount of drain accumulating from bottom to top. A health diagnosis method for a high-pressure fluid processing apparatus including a high-pressure pump that generates a pressurized fluid, a pressurized fluid supply unit that supplies the pressurized fluid, a hydraulic unit that drives the high-pressure pump, a nozzle head that ejects the pressurized fluid, an abrasive supply means that supplies an abrasive, at least one detection means disposed in the high-pressure pump, the nozzle head, or the abrasive supply means, an acquisition unit, a diagnosis unit, and a processing condition control unit,
an acquisition step in which the acquisition unit acquires detection data by the detection means;
a diagnosis process in which the diagnosis unit diagnoses the condition of the high-pressure pump, the pressurized fluid supply unit , the hydraulic unit, and the nozzle head by increasing or maintaining the supply pressure or discharge pressure of the high-pressure pump, the pressurized fluid supply unit, the hydraulic unit, and the nozzle head based on the detection data, while maintaining a processing pressure of 100 to 700 MPa, by monitoring a numerical condition score based on a combination of data acquired by the detection means against a predetermined soundness standard before a failure occurs;
and a processing condition control step in which the processing condition control unit controls the processing conditions based on the detection data by using any one of a cutting program, a set cutting speed, cutting parameters including information on the material of the workpiece and cutting quality, and a calculated cutting speed. The method for diagnosing the health of a high-pressure fluid processing apparatus according to claim 5,
The high-pressure fluid processing apparatus includes a hydraulic pump, a water supply pump, and a booster provided to the high-pressure pump,
the detection data being any one of the supply pressure or discharge pressure, discharge flow rate, rotation speed or switching time of the booster, and the amount of abrasive supplied by the abrasive supply means. The method for diagnosing the health of a high-pressure fluid processing apparatus according to claim 5 or 6,
the acquiring step further comprises a step of calculating an average value of upper and lower limits of the detection data.

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