JP7079904B2 - Coolant quality detection system and coolant management system - Google Patents

Description

The present invention relates to a cooling liquid quality detection system that measures the temperature, concentration, impurity amount, pressure, etc. of a flow path that supplies a cooling liquid for a processing tool in a metal processing apparatus and wirelessly transmits the cooling liquid to the outside. ..

Tool cooling during machining in cutting equipment has a great effect on product machining accuracy, yield, tool life, etc., but the temperature of the cooling oil is not measured for each device, tool, or machining. The situation was left to the rules of thumb of the workers at the site.

On the other hand, in a high-precision machining site, a coolant cooling device for cooling the cooling oil is provided as an additional accessory such as a cutting tool. However, because it is large and expensive, it has not been widely used in the field, and when it was introduced, it led to an increase in the cost of processed products. In addition, in the case of a conventional coolant cooling device, only control (concentration, pH, replacement frequency, recommended replacement time, etc.) can be performed under the standard threshold value and usage conditions specified by the cooling oil manufacturer, and processing at each site is possible. Optimal performance could not be achieved for the life of parts and tools.

Therefore, there has been an increasing social and potential need for a system that can quantitatively evaluate the quality of actual machining using coolants of various specifications for each machining condition and each machining device. In addition, this need is a technical issue that will be required in the future not only for cutting equipment, grinding equipment, and lathe equipment, but also for forging equipment and casting equipment that utilize coolant, and all other equipment for processing a wide range of metals. This is a technical issue to be solved even in view of the situation where it is expected that cross-sectional and centralized management of equipment in each factory and peripheral raw materials will be required in the coming IOT society.

In recent years, the applicant has proposed measurement and evaluation techniques (see Patent Documents 1 and 2) during machining of each machining tool in a machining device, and has been positioned as a front runner in the field by those skilled in the art. It is the one that led to the creation of the present invention as something that is closely related and can be combined and developed.

International Publication WO2015-022967 International Publication WO2016-11136

The present invention was created in view of the above circumstances, and measures the temperature and concentration of the flow path for supplying the cooling liquid of the processing tool in the metal processing equipment, the amount of impurities, etc., and wirelessly transmits the cooling liquid to the outside. The purpose is to provide a pass / fail detection system.

In the present invention
It is equipped with a temperature measuring means that can measure the temperature at least every predetermined time in the supply flow path of the coolant that cools the machining tool during the operation of the metal processing equipment and detect the change.
Optimal for the metal processing equipment and processing tools other than the control conditions specified in advance for the cooling oil by tracking and evaluating at least the change of the measurement information of the coolant including the temperature information measured from the temperature measuring means. A coolant quality detection system that detects conditions is provided.

Further, in the coolant quality determination system of the present invention, the coolant in the flow path for cooling the machining tool during the operation of the metal processing apparatus is separated at a predetermined date and time or at a predetermined period to concentrate the concentration. Equipped with a concentration measuring means that can be measured, tracked and evaluated, including its changes,
It is preferable to detect at least the change in the concentration information of the coolant measured from the concentration measuring means to detect the optimum conditions for the metal processing apparatus and the processing tool other than the control conditions specified in advance for the cooling oil. ..

In this coolant quality detection system, the temperature of the coolant is measured at predetermined time intervals (for example, periodic monitoring at predetermined times in the morning and afternoon every day) during the operation of the metal processing equipment, and at the same time, its concentration is also measured periodically. be able to. The applicant periodically measures whether or not the performance of the coolant is maintained, and objectively detects the performance deterioration as numerical data due to the change over time. We are proposing a method that can make a quantitative judgment, rather than an ambiguous judgment that had to rely on the criteria and the rules of thumb of the operator. It is also advantageous to pay attention to the change in the concentration of the coolant as an indispensable element for determining the quality of the coolant, and to consider the change in the concentration and the above-mentioned temperature change as a determination factor. In other words, in the past, it was common for the coolant manufacturer to simply provide the undiluted solution and dilute it to the user. Has not paid attention to the fact that the concentration cannot always maintain the state specified by the manufacturer, and the applicant learned this and proposed it as an essential requirement for maintaining the cooling performance of metal processing equipment. It is a thing. Therefore, according to this system, it is possible to avoid tool fatigue, breakage, etc. due to successive deterioration of the coolant, which has not been noticed so far, and to avoid deterioration of machining accuracy of the workpiece and reduction of product yield. can do. Furthermore, by converting this into data, it is possible to perform regular evaluation and management.

The metal processing equipment includes machine tools such as cutting equipment, lathe equipment, grinding equipment, friction stirring joining equipment, forging equipment, rolling equipment, casting equipment, etc., and is widely used for detecting the quality of these coolants. It is possible.

It is also effective to provide a transmission means for wirelessly transmitting various measurement information including the temperature information measured by the temperature measuring means and the concentration information measured by the concentration measuring means to the outside.

Further, it is preferable that the temperature measurement by the temperature measuring means is always performed in real time and the temperature information is monitored. As with the temperature measurement, the concentration measurement by the concentration measuring means may be constantly monitored in real terms, or may be performed at predetermined time intervals (every date and time or every predetermined period).

In this way, by wirelessly transmitting measurement information such as temperature information to the outside during the operation of the metal processing device, it is possible to detect and evaluate the change in real time with an external display / analysis device, and the processing device. It is possible to quickly respond to abnormalities during operation. At the same time, it is possible to collect measurement information from the coolant quality detection system for each of multiple metal processing equipment, and with the recent development of the IOT society, we will promote the construction of a system that can quantitatively evaluate the processing equipment. can. At this time, since the measurement information is wirelessly transmitted externally from each processing device and monitored intensively, the number of wirings at the measurement site can be reduced even when measuring a plurality of processing devices. Further, in forging equipment, rolling equipment, etc., it is difficult to monitor in the vicinity of the equipment for safety reasons, and in that sense, this system capable of wirelessly transmitting measurement information and monitoring at a remote position is advantageous. In particular, the recent Cloud-type database is used for centralized management of coolant for metalworking machines across multiple factories and management of coolant for metalworking machines across multiple companies, even though it is a single company. Utilizing it, it collects sequential information of coolant exposed to various usage conditions, sometimes severe and sometimes mild conditions, and events such as the conditions of use, the quality of metal processing, and the occurrence of corruption described later. We are confident that by taking a bird's-eye view of the collected data and widely associating it in the form of processing big data, it will be possible to prevent mistakes in the timing of coolant replacement and improve the yield of processed products.

As a specific example 1, the temperature measuring means is a pump that supplies the cooling liquid into the storage container, the temperature in the flow path that discharges the cooling liquid from the metal processing device into the storage container, or the storage container into the metal processing device. The temperature in the flow path to the output side of the above can be measured, and the change in the measurement information of the coolant can detect the change with time of the temperature measured by the temperature measuring means.

When the temperature measuring means measures the temperature of the flow path on the output side of the pump that supplies the coolant from the storage container into the metal processing apparatus, immediately after the temperature is output from the pump for supplying the coolant to the processing apparatus. When measuring the temperature of the coolant, the temperature of the coolant actually provided to the processing site can be measured, and in combination with the pump performance, a flow path that bypasses the excess coolant to the relief valve is used. The compatibility with the case of doing is good.

Further, when the temperature measuring means measures the temperature of the cooling liquid in the cooling liquid storage container or in the flow path discharged from the metal processing device into the storage container, the cooling liquid storage container (so-called coolant tank or the like) is used. ) Is originally a place to add coolant, so it is easy to access, and since the existing external cooling device also sucks the coolant in the coolant tank, the external cooling device and this system are used together. Easy to do
When retrofitting this system to existing processing equipment, it will be particularly easy to introduce and lead to market expansion. In this way, if the introduction to the existing system progresses, it will be easier to feed back more data, and it can be expected that it will lead to the collection of big data that will be the evaluation standard of the coolant due to temperature changes, which is also advantageous in that respect.

As a specific example 2, the temperature measuring means measures the temperature of the coolant in the flow path that supplies the coolant from the spindle side that grips the machining tool to the machining tool, and the change in the measurement information of the coolant is It is possible to detect the change with time of the temperature measured by the temperature measuring means.
The flow path for supplying the coolant from the spindle side to the machining tool communicates with, for example, a flow path for discharging the coolant directly from the lower end of the spindle of the machining apparatus to the machining tool, or a flow path in the spindle. A flow path through which the coolant reaches the tip of the machining tool through a through hole or a half through hole in the machining tool can be considered.

As a specific example 3, the temperature measuring means measures the temperature of the cooling liquid in the flow path for supplying the cooling liquid to the injection means that injects the cooling liquid from the outside toward the processing tool, and changes in the measurement information of the cooling liquid. Can also detect the change with time of the temperature measured by the temperature measuring means.

In Specific Examples 2 and 3, the temperature at the processing point that directly affects the processing accuracy and the like can be evaluated by directly measuring the cooling liquid flowing to the processing tool of the metal processing apparatus to be cooled.

Among the temperature measuring means described above, it is also possible to detect the difference in the temperature change by combining the temperature information measured by a plurality of temperature measuring means. For example, as in the specific example 1, the temperature in the flow path in which the temperature measuring means discharges the coolant from the storage container or the metal processing device into the storage container, and the temperature in the flow path from the storage container to the metal processing device. When measuring the temperature in the flow path to the output side of the pump to be supplied to, the change in the measurement information of the coolant is detected by the difference in temperature measured by the temperature measuring means or the change over time.

Further, as in the specific example 2, the temperature of the coolant in the flow path where the temperature measuring means passes through the inside of the machining tool from the spindle side that grips the machining tool and supplies the coolant to the tip, and the spindle. When measuring the temperature of the coolant in the flow path that discharges the coolant from the side to the tip of the processing tool, or
As in the specific example 3, the temperature measuring means measures the temperature of the coolant in the flow path that supplies the coolant to the machining tool from the spindle side that grips the machining tool, or the coolant from the outside toward the machining tool. When measuring the temperature of the cooling liquid in the flow path for supplying the cooling liquid to the injection means to be injected and the temperature in the flow path for discharging the cooling liquid from the storage container or the metal processing device into the storage container. To, respectively
The change in the measurement information of the coolant can be detected as the difference in temperature measured by the temperature measuring means or the change over time.

In addition, by combining temperature information at a plurality of locations, it is possible to detect differences in temperature gradients at each location, and it is possible to more precisely verify deterioration of the coolant.

Further, as described above, when the temperature measured by the temperature measuring means or the difference between the temperatures exceeds a preset threshold value, it can be detected as an abnormality of the coolant or the processing apparatus.

Further, the above-mentioned concentration measuring means is, for example, in the storage container of the coolant, in the flow path discharged from the metal processing device into the storage container, and to the output side of the pump supplying from the storage container to the metal processing device. In the flow path of the above, in the flow path for supplying the coolant from the spindle side for gripping the machining tool to the machining tool, or in the flow path for supplying the coolant to the injection means for injecting the coolant from the outside toward the machining tool. The coolant at one or more of the positions is separated and its concentration is measured. At this time, when the concentration measured by each concentration measuring means or the change with time of the concentration at each measurement position exceeds a preset threshold value, it can be detected as an abnormality.

Further, in another present coolant quality detection system, the amount of impurities contained in the coolant is determined at predetermined intervals or at a desired time in the coolant supply flow path that cools the machining tool while the metal processing apparatus is operating or stopped. Equipped with detectable impurity extraction means
The impurity extraction means is at least in the storage container of the coolant, in the flow path discharged from the metal processing device into the storage container, or from the storage container to the output side of the pump supplied into the metal processing device. By detecting the amount of impurities in the cooling oil, the optimum conditions for the metal processing equipment and the processing tool other than the control conditions specified in advance for the cooling oil are detected.

Impurities such as polishing debris are mixed or spoiled in the coolant over time as the processing equipment is processed, which is one of the causes of deterioration of the coolant. Therefore, in this system, deterioration of the coolant can be directly detected by detecting the amount of this impurity. By adopting a system that detects the amount of impurities, it is possible not only to prevent deterioration of processing accuracy and efficiency due to deterioration of the coolant, but also to prevent deterioration of the coolant even during holidays. It is possible to reduce the burden on the site manager who is operating for hours.

To measure the amount of impurities, it is necessary to analyze at least the cooling liquid storage container (tank) and the cooling liquid in the flow path near the storage container. Since the inside of the storage container and the nearby flow path are easily accessible from the outside, impurities are easily mixed in and spoiled. Conventionally, the site manager visually checked the coolant in the storage container to check the degree of deterioration. This is because it is easy to move to.

Further, the impurity detecting means may analyze the amount of impurities accumulated per unit area from the cooling liquid storage container to the filtration filter of the filtering device on the flow path provided in the metal processing device.

In this example, the filtration filter that the metal processing equipment originally has or that should be provided in the external cooling device is utilized, the so-called sludge density in the filter is measured, the amount of impurities is measured at each periodic filter replacement, and the coolant is measured. It can be used for pass / fail judgment.

Further, the impurity detecting means may measure the pH of the cooling liquid in the supply flow path.
The coolant has a pH value range recommended by the coolant manufacturer, and the degree of deterioration of the coolant can be evaluated based on whether or not it is within this numerical range. Therefore, this system measures the pH value to measure the coolant. It can be used as an index of deterioration. That is, the pH of the coolant is highly dependent on the concentration (for example, in the case of a water-soluble coolant, the ratio of water dilution to the stock solution), so it is periodically compared with the pH recommended by the coolant manufacturer, for example. If the pH value is set, the deterioration status can be detected and the replacement time can be determined.

The significance of pH measurement is as follows. In general, when the coolant is used at high temperatures in the summer, a decrease in pH occurs. At this time, the coolant is usually spoiled. At this time, at the same time, biodegradation of components (additives) necessary for maintaining the performance as a cooling liquid such as a detergent, a rust preventive, and a pH adjuster contained in the coolant liquid often occurs. In addition, the decrease in pH also causes metal corrosion due to its chemical action, and is generally regarded as synonymous with the deterioration of the coolant. In addition, since the above-mentioned putrefactive coolant has a rather unpleasant odor, it is controlled by the pH value, and when signs of putrefaction are detected, putrefaction avoidance such as replacement of coolant, addition of anti-corruption agent, and injection of undiluted coolant is added. It is considered to be an extremely useful measurement because it will be possible to easily implement the countermeasures for.

Further, the impurity detecting means may measure the discharge pressure of the pump that supplies the cooling liquid from the storage container into the supply flow path of the metal processing apparatus.

It is known that the pump pressure of the coolant decreases as the sludge accumulates. Therefore, the originally detected pump pressure data can be used for evaluation of the amount of impurities, evaluation of deterioration status, determination of replacement time, and the like.

Further, the present coolant quality detection system is provided with a pressure measuring means capable of detecting the pressure of the coolant at one or more positions in the supply flow path in the metal processing apparatus at a predetermined time or at predetermined periods. The change in the pressure information measured from the pressure measuring means may be detected.

For example, a pressure measuring means (pressure sensor, etc.) is provided in the pump discharge pressure from the coolant storage container (coolant tank) or in the flow path of the coolant in other flow paths, and the pressure information is measured. It is also possible to detect changes in. A change in pressure information obtained from the pressure measuring means can be detected, and a case where the detected pressure or the difference in pressure at each detection position exceeds a preset threshold value can be detected as an abnormality.

Further, in the present coolant quality detection system, information from the concentration measuring means, the impurity detecting means, and the pressure measuring means is obtained with respect to the temperature information from the degree measuring means and / or the difference between the temperature information. It can be monitored in combination.

It is also possible to combine the temperature information measured by the temperature measuring means provided inside the processing tool during processing of the metal processing apparatus and estimate the temperature near the processing point of the processing tool from each information. Specifically, the temperature measuring means provided inside the processing tool during processing of the metal processing equipment is the real-time processing state of the temperature, vibration, and / or strain of the processing tool provided inside the processing tool of the metal processing equipment. It is a processing tool measuring device having a measuring unit, receiving the measurement result of the real-time measuring unit on a processing tool or an electronic substrate provided inside a tool holder for holding the processing tool, and transmitting the measurement result to the outside.

In addition to detecting temperature, concentration, impurities, pressure, and pH, this coolant quality detection system also has kinematic viscosity, color tone, transparency, turbidity, and electrical conductivity of the coolant as factors that cause deterioration of the performance of the coolant. And so on. At present, none of the factors have been evaluated for each metal processing device or processing condition, and it relies on standard information provided by the coolant manufacturer and the rules of thumb of field operators. Measurement of such other factors can also be combined with this coolant quality detection system, transmitted wirelessly to the outside, and centrally monitored.

In this case, pray for the correlation between the measurement data of the temperature change at predetermined time intervals during the processing of the processing tool itself provided by the conventional applicant and the data of the temperature / concentration change of the coolant of this system. Therefore, the information that affects the machining accuracy of the machining tool can be comprehensively analyzed, and the machining efficiency can be improved.

Further, the coolant quality detection system has a real-time measuring unit for the temperature, vibration, and / or strain processing state of the processing tool provided inside the processing tool of the metal processing apparatus, and the measurement result of the real-time measurement unit. Can be provided with a machining tool measuring device (information terminal) that receives the temperature on the machining tool or an electronic board provided inside the tool holder that grips the machining tool and transmits it to the outside.

It is even more effective to combine this coolant quality detection system with a device that directly measures the temperature of the machining tool during operation of the metal machining device and constantly monitors it. It is possible to analyze and manage the relationship between the temperature change of the machining tool during machining and the performance of the coolant that cools it in real time, which is useful for improving machining accuracy and preventing damage to the machining tool in advance. ..

In addition, this coolant quality detection system separates the coolant in the supply flow path of the coolant that cools the machining tool during the operation of the metal processing equipment, and the kinematic viscosity, color tone, transparency, and turbidity of the coolant. , The measuring means capable of measuring the conductivity, and the information from the measuring means can be obtained from the temperature measuring means, the concentration measuring means, and / or the impurity amount detecting means, and / or the pressure measuring means. It is possible to provide a measurement information transmission means for transmitting the measurement information from the information terminal to the external server together with the measurement information.

As a coolant management system using this coolant quality detection system, a terminal transmission means that receives measurement information from the measurement information transmission means and transmits it to one or more information terminals preset for each metal processing device. A determination means for determining whether or not any one or a plurality of measurement information received from the measurement information transmission means exceeds a preset threshold value or a numerical range, and the determination means provides a threshold value. Alternatively, an example is provided including a warning transmission means for transmitting warning information from an external server to the information terminal when it is determined that the numerical range has been exceeded.

As an example, when it is determined by the determination means that any one or more of the measurement information received from the measurement information transmitting means exceeds the threshold value or is out of the numerical range, the solvent is automatically added. When the solvent is supplied into the storage container and it is determined by the determination means that the threshold value is not exceeded or the value is within the numerical range, the supply of the solvent may be automatically stopped.

As another example, while the user is looking at the displayed measurement information, when any one or more of the measurement information received from the measurement information transmitting means receives the supply command information from the information terminal, the solvent is used. Can also be supplied into the storage container.

As described above, the coolant management system is for extending the life of the coolant (water-soluble cutting oil (coolant or coolant)) and keeping it in a suitable state. In the above-mentioned coolant quality detection system, in addition to measuring the concentration, pH, temperature history of the coolant, changes in the discharge pressure of the circulation pump in the circulation system, and the amount of impurities, the kinematic viscosity, color tone, and transparency of the coolant, Turbidity and conductivity can be measured at all times. In the coolant management system using this coolant quality detection system, at least one of the measurement results is displayed while constantly transmitting the measurement results to the information terminal (Cloud type server) owned or contracted (rented) by the administrator. Software that issues a warning when the product deviates from a predetermined range (threshold) and a solvent (including chemicals) for adjusting the steady state of the coolant are automatically supplied to the storage container (coolant storage tank) for measurement. Depending on the result, the automatic supply operation can be remotely controlled by centralized management by an external server so that the measured values of the coolant are within a predetermined range. In addition, in tracking the change in pH, it is conceivable to add a system that measures and externally transmits information on the outside air temperature to the measured value of the usage environment of the coolant.

As described above, according to the coolant quality detection system of the present invention, the temperature and concentration of the coolant, the amount of impurities, etc. in the flow path for supplying the coolant of the processing tool in each metal processing apparatus are measured and wirelessly transmitted to the outside. However, it can be monitored, and even if it is measured for each of multiple metal processing devices, it can be monitored intensively externally.

The perspective view of the cutting apparatus as an example of the metal processing apparatus using the coolant quality detection system of this invention is shown. It is a flow path diagram which shows the supply path of the cooling liquid to the processing tool of a cutting apparatus. The flow of an electric signal until it is transmitted to the external unit 16 with respect to the measured temperature, concentration, and amount of impurities will be illustrated and described. An example of a flow chart showing abnormality detection by measuring the temperature and concentration of the coolant in the cutting apparatus of FIGS. 1 to 3 is shown. Similar to FIG. 4, an example of a flow chart showing abnormality detection by measuring the temperature and concentration of the coolant and pH in the cutting device is shown. An example of a graph showing the temperature / concentration data transmitted by the wireless transmission device on the display (output device) of the storage / arithmetic unit 19 after actually measuring the temperature and concentration at predetermined time intervals during processing is shown. ing. An input table for the temperature threshold (° C) for each of the plurality of processing machines (see the IP address machine No. and machine name in the leftmost column) is shown. The vertical sectional view of the tool holder unit in the processing tool measuring apparatus combined with this coolant quality detection system is shown. An example of a configuration diagram of a coolant quality management system that centrally manages cutting equipment in different factories via an external server (including a Cloud type server) is shown.

<< Overview of cutting equipment example >>
FIG. 1 shows a perspective view of a cutting device 100 as an example of a metal processing device using the coolant quality detection system of the present invention. The cutting device 100 is generally configured to include a tool holder grip portion 105, a member installation surface 102a to be machined, a work stage 102, a head abutment 108, a head 107, and an operation panel 106. For the members with reference numbers not shown in FIG. 1, refer to FIG. 2 and the like described later.

First, a machining tool such as a drill that causes the tool holder grip portion 105 to make a rotational contact (contact direction = arrow Z direction, rotation direction = arrow Z axial direction) with the workpiece 109 (see FIG. 2) to be machined. A tool holder 104 holding the 110 (see FIG. 2) is attached. As a result, the tool holder grip portion 105, the tool holder 104, and the machining tool 110 rotate integrally. Further, the workpiece 109 is placed on the workpiece installation surface 102a on the upper surface of the work stage 102 that moves in the X direction on the base 103, and is mounted on a fixing clamp (not shown) or a fixing port (not shown). It is fixed by using> etc.

The operator operates the operation panel 106 to move the work stage 102 in the X direction, and stops and positions the member to be machined at a position immediately above the desired joining position of the machining tool 110. Next, the operation panel 106 is operated in a state of being stopped and positioned on the member to be machined, and in addition, the tool 110 is lowered to bring it into contact with the member to be machined, and the tool 110 is rotated while being in contact with the machined portion in the machining direction. Move it repeatedly. The operator inputs each parameter such as the load applied to the machining tool 110 in advance on the operation panel 106, the machining speed of the machining tool 110, the cutting distance per cutting, and the rotation speed of the machining tool 110, and sets the cutting conditions.

When the setting on the operation panel 106 is completed, the head 107 is moved downward in the Z direction according to each parameter set by rotating the machining tool 110 on the workpiece, and the machining tool 110 is moved at the cutting start point of the workpiece 109. Abut. Further, in the example of FIG. 1, the movement in the Y direction is performed by moving the head abutment 108 in the Y direction at a set moving speed. In the example of FIG. 1, a cutting device 100 is shown in which the movement in the X direction is performed by the work stage, the movement in the Y direction is performed by the head abutment 108, and the movement in the Z direction is performed by the spindle 101. In some cases, the device moves in the Y direction on the work stage 102. After the desired cutting is achieved, the head 107 is moved upward in the Z direction while maintaining the rotation of the machining tool 110, and the rotation is stopped after the machining tool 110 is pulled out from the cutting end point. Cutting is completed by this process.

<< Example of coolant flow path in processing equipment >>
Subsequently, the supply path of the coolant (hereinafter, also referred to as “coolant”) to the machining tool 110 of the cutting apparatus 100 of FIG. 1 will be described with reference to FIG. Here, the coolant is a cutting fluid (water-soluble cutting oil) having a lubricating function, a cooling function, and the like for the cutting portion. As shown in FIG. 2, the cutting device 100 has a tank 112 in which coolant is stored and a pump 114 installed in the tank 112. Further, the cutting device 100 has a valve unit (coolant supply unit) 122 composed of a plurality of solenoid valves 116, 118, 120 and the like. The valve unit 122 has an input flow path 124 connected to a discharge port (output port) of the pump 114. In the input flow path 112, a relief valve 126 is connected to the discharge flow path 124a immediately after the discharge port of the pump 114, and a surplus flow rate input to the valve unit 122 to the relief valve 126 (this is from the flow rate from the pump 114). , Equal to the flow rate obtained by subtracting the flow rate required for the pulp unit 122) is connected to the drain flow path 129 that returns the flow rate to the inside of the tank 112, thereby controlling the flow rate input to the valve unit 122.

Further, a first supply path 130, a second supply path 132, and a third supply path 134 are connected to the input flow path 112 that has passed through the relief valve 126. Each supply path 130, 132, 134 is composed of a check valve 136, 138, 140, an electromagnetic switching valve 116, 118, 120 and a throttle valve 142, 144, 146. The output flow path 148 connected to the first supply path 130 is connected to an injection nozzle (injection means) 154 for injecting coolant. Similarly, the output flow path 150 connected to the second supply path 132 is via the head 107 (or the head abutment 108), the tool holder grip portion 105, and the connection flow path 150 formed in the tool holder 104. , Is connected to a machining tool 110 such as a rotary tool. The processing tool 110 is provided with a through hole (oil hole: not shown) from the upper end to the lower end, and communicates with the connection flow path 150. Further, the output flow path 152 connected to the third supply path 134 similarly grips the tool holder via the head 107 and the like and the connection flow path 152 formed in the tool holder gripping portion 105 (or in the tool holder 104). It is connected to a port (not shown) at the lower end of the unit 105 (or tool holder 104).

In order to control the operating state of the solenoid valves 116, 118, 120 of the valve unit 122, the cutting device 100 is provided with a control unit 160 including a CPU, a memory, a drive circuit, and the like. The control unit 160 controls the solenoid valves 116, 118, 120 in a communicating state or a shutoff state according to a predetermined control program. When the solenoid valves 118 and 120 of the second supply path 132 and the third supply path 134 are switched to the communication state, the coolant discharged from the pump 114 is connected to the connection flow path 150 from the second supply path 132 and the third supply path 134. , 152, and is supplied to the machining tool 110 from the inside or the outside of the machining tool 110. On the other hand, when the solenoid valves 118 and 120 of the second supply path 132 and the third supply path 134 are switched to the cutoff state, the coolant is cut off in the second supply path 132 and the third supply path 134.

In this way, when the valve unit 122 is controlled to communicate with the second supply path 132 (first state), the coolant passes through the machining tool 110 and is discharged from the coolant hole at the lower end. Further, when the valve unit 122 is controlled to communicate with the third supply path 134 (second state), the coolant passes through the tool holder grip portion 105 (or the tool holder 104) from the coolant hole at the lower end. It is sprayed onto the processing tool 110. On the other hand, when the valve unit 122 is controlled so as to shut off the second supply path 132 and the third supply path 134, the discharge / injection of the coolant from the respective coolant holes is stopped.

Further, when the solenoid valve 116 of the first supply path 130 is switched to the communication state, the coolant discharged from the pump 114 is supplied to the injection nozzle 154 via the first supply path 130 and the output flow path 148. Then, the coolant supplied to the injection nozzle 154 is injected from the outside toward the workpiece 109 and the processing tool 110.

<< Coolant temperature, concentration, and impurity detection method at multiple positions >>
Next, a method of measuring the temperature, concentration, and amount of impurities in the coolant in the metal processing apparatus will be described with reference to the flow path diagram of the cutting apparatus 100 of FIG. In FIG. 2, circles A, B, E, and F indicating the flow path by arrows exemplify each measurement position (including a position in the vicinity). (Coolant is separated) and measured, but here it is simplified. At the positions of circles A, B, E, and F, the coolant circulates in the cutting device 100 (metal processing device), respectively. The position of the flow path immediately before being discharged to the tank 112, the position in the tank 112, the position of the flow path 124a immediately after the input to the pump 114, and the relief valve 126 after the input to the pump 114 to the tank 112. The position of the drain flow path 128 to be drained is shown (hereinafter, the measurement of the coolant in the tank 112 will be described by the measurement at the position of the circle A). This tank 112 utilizes the existing coolant tank. Temperature measurement is typically performed using a thermocouple, and the temperature signal output from the thermocouple is digitized and transmitted externally. For concentration measurement, ultrasonic type, filter type, spectroscopic type, and electrical conduction There are rate types, etc., and the output signal is transmitted externally.

The amount of impurities is measured by (1) pH measurement, (2) sludge density measurement, (3) pump pressure measurement, and the like.
(1) In pH measurement, the amount of change in the pH value of the coolant is measured to estimate the amount of impurities mixed in, the amount of decomposition of the coolant, deterioration due to oxidation, etc., and the difference from the pH value recommended by the manufacturer is used. A pass / fail judgment is made as a threshold value. The pH measurement method is roughly classified into an indicator method, a metal electrode method, a glass electrode method, and a semiconductor sensor, but in the case of the indicator method, one example is a method of immersing a pH test solution, which is an assumed deterioration limit buffer solution. It is a simple visual method to compare the color with the standard color and the color when immersed in the actual coolant. In the case of the metal electrode method, for example, in the antimony electrode method, the tip of the antimony rod is polished and immersed in the coolant of the sample together with the comparison electrode, and the pH is obtained from the potential difference between the two. The glass electrode method is a method of measuring the pH of a coolant by using two electrodes, a glass electrode and a comparison electrode, and knowing the voltage (potential difference) generated between the two electrodes. In the case of a semiconductor sensor, the function of the glass electrode is realized by a semiconductor chip. In this system, the frequency of detecting impurities is assumed to be detected at regular intervals, so it is possible to use the indicator method. However, for the convenience of determining the quality of the coolant in combination with the temperature data and the like, in consideration of the ease of data accumulation, another method, particularly a semi-glass sensor, is preferably adopted.

(2) The sludge density measurement is a method in which a coolant is passed through a filtration filter and the amount of sludge such as cutting debris accumulated in the filter is measured per unit area at predetermined time intervals. Although this method is a simple method for detecting the actual amount of impurities, it is originally suitable for detection at the position immediately before the tank 112 of the circle A in that a filter 119 (not shown) for filtration purposes can be utilized. There is.

(3) In the pump pressure measurement, in the measurement at the position of the circle A, when the amount of impurities in the coolant increases, the sludge component in the coolant increases and the specific gravity increases, so that the suction of the coolant and the efficiency of the liquid feed are improved. Since the phenomenon that the pump pressure decreases and the pump pressure decreases appears, this change is utilized, a pump pressure of a predetermined threshold is set, and the quality of the coolant is detected from the measured pump pressure. In that sense, in order to measure the pump pressure, the measurement at the position of the circle A is optimal.

Regarding the measurement at the positions of the circles B, C, D, G, and H, the temperature, concentration, and impurity amount measurement are particularly selectable positions as the temperature measurement positions (as described above, separately circled A, Any one of the positions B, E, and F is indispensable as the measurement position around the tank 112), and here, the temperature measurement is mainly referred to. As described above, the position of the circle F is the flow path 124 (124a) immediately after the output of the pump 114, and the position of the circle B is the excess flow rate of the coolant desired in the cutting device 100 by the relief valve 126. It is a flow path 128 drained into the tank 112. Further, when the method of detecting the amount of impurities by the reduced pressure amount (differential pressure) of the pump pressure is adopted, the compatibility with the measurement at the B position is good.

Further, as described above, the position of the circle C is the immediately preceding flow path 148 to the nozzle 154 that injects coolant in the vicinity of the machining tool 110 and the workpiece 109. The temperature at this position is a measurement of the temperature of the coolant actually injected to the machining tool 110 or the like, and is the same as the temperature measurement technique in the machining tool 110 in the machining tool measuring device (see FIG. 8) described later. Good compatibility when combined and used as an evaluation for guaranteeing processing accuracy. Further, the position of the circle H is an intermediate position of the flow path 153 in which the coolant is discharged and sprayed from the flow paths 148, 150, 152 to the processing tool 110 to be cooled, and then the coolant is recovered to the tank 112. That is, the measured temperature at the position C is the temperature before cooling the processing tool 110 or the like, and the temperature at the position H is the temperature after the cooling process. Therefore, the fluctuation of the temperature difference between the two positions C and H is the temperature of the coolant. It can be said that it represents the cooling performance. Therefore, if measurements are taken at two locations, position C and position H, the difference can be utilized for determining the quality of the coolant (described later in the flow chart of FIG. 5).

The circles D and G are provided in the flow path for supplying coolant to the machining tool 110 from the spindle side of the cutting device 100, and specifically, the position of the circle D communicates with the through hole inside the machining tool 110 as described above. It is an intermediate position of the flow path 150 that directly supplies the coolant to the inside of the machining tool 110, and the position of the circle G is up to the port (not shown) at the lower end of the tool holder grip portion 105 (or tool holder 104). It is an intermediate position of the flow path 152 of. In the case of a device that supplies coolant to the machining tool 110 from the spindle side, this flow path also has the same temperature measurement technique in the machining tool 110 in the machining tool measuring device (see FIG. 8) described later as well as the measurement at the position C. It is advantageous in that the combination of the above and the temperature difference between the positions D and G and the position H can be utilized for determining the quality of the coolant.

≪Combination with measurement information from machining tool measuring device≫
Here, it is also possible to combine with the temperature measurement technique in the machining tool 110 in the machining tool measuring device (see FIG. 8) described above. FIG. 8A shows a vertical cross-sectional view of the tool holder unit 104 as a machining tool measuring device for measuring the temperature, vibration, strain, etc. of the machining tool 110. In FIG. 8, the upper part of the paper surface is the spindle 101 side of the metal processing device (cutting device) 100, and the lower part is the processing tool (cutting tool) 110 side. The tool holder unit 104 is inserted and gripped in a spindle 101 above the brim portion 104h in a nested manner and rotates cooperatively. Further, the inside of the tool holder unit 104 is hollow, and a chuck 104c for gripping the cutting tool 110 as shown in FIG. 8B is fixed at the lower part.

A gap 104i for arranging parts is provided above the chuck 104c, and the battery 104b is arranged in the gap 104i. The battery 104b may be rechargeable. Data from various sensors such as thermocouples and thermistors that measure temperature, acceleration sensors that measure vibration, and strain gauges that measure strain are A / D converted by the control board 104g arranged in the void 104i and through holes. It is transmitted from the wireless transmission device 104e around the outside of the tool holder main body 104a connected via the above. The data from various sensors may be A / D converted by the control board on the outer peripheral portion of the tool holder main body 104a.

The cutting tool 110 is fixed by the OO line of FIG. 8 (b) at the lower end of the chuck 104c (the OO line of FIG. 8 (a)). The cutting tool 110 is drilled from the upper end to the lower end in the direction of the rotation axis to form a semi-through hole 110a. The semi-through hole 110a is a coaxial hole communicating with the gap 104i. For example, a thermocouple 111 is attached to the lower end of the semi-through hole 110a as a temperature sensor, and the conducting wire 113 connected to the thermocouple 111 is connected to the gap 110i and is connected to the control board 104g. Further, for vibration detection of the cutting tool 110, for example, an acceleration sensor provided in the gap 110i is used for measurement.

<< About external transmission >>
Next, the transmission of the temperature information, the concentration information, and the impurity amount information measured at any one or a plurality of the circled positions A to H in FIG. 2 to the outside of the processing apparatus 100 will be described. In FIG. 3, the flow of the electric signal until the measured temperature, concentration, and amount of impurities are transmitted to the external unit 16 will be illustrated and described. In this example, the flow of electric signals is generally shown from the temperature measuring means 10, the concentration measuring means 11, and the impurity amount measuring means 12. The signals from the temperature measuring means 10, the concentration measuring means 11, and the impurity amount measuring means 12 are shown as an example of being output as digital signals. For example, when the amount of impurities in the coolant is measured by the above sludge density, when the concentration is visually detected as in the case of measuring by the indicator method, when the data is extracted by the attached cooling device, or when the coolant is cooled. Is separately pumped from the tank 112 and data is input by the operator, the concentration measuring means 11 and the impurity amount measuring means 12 in the block diagram of FIG. 3 are deleted, and the data is separately input to the external unit 16. Sometimes.

The temperature measuring means 10 in FIG. 3 is a temperature receiving unit that typically uses a thermocouple to output a digital signal by a control circuit in the device via a potential difference amplifier or an A / D converter. Further, the output signals from the temperature measuring means 10, the concentration measuring means 11, and the impurity amount measuring means 12 are received by the controller 14 of the transmission unit 13 provided in the cutting device 100 or connected by wire, and are externally connected by the wireless transmission device 15. Is transmitted wirelessly to.

Further, the output signals of the wirelessly transmitted temperature information, concentration information, and impurity amount information are received by the wireless receiving device 17 of the external unit 16. The wireless communication standards between the wireless transmitting device 15 and the wireless receiving device 17 shown by the broken line in FIG. 3 are Wi-Fi (Wireless Fidelity), Bluetooth (Bluetooth), wireless LAN (Local Area Network), and ZigBee. Etc. can be used. The external unit 16 may be an example of a storage / arithmetic unit 19 such as a no-phone personal computer including a wireless receiving device 17, but in the example of FIG. 3, a dedicated wireless receiving device 17 is separately installed and connected to the external unit 16 by a USB port. Then, the signal is received by the storage / arithmetic unit 19. Then, an image is displayed, printed, or the like on an output device 20 such as a display or a printer.

Further, although not shown, when the above-mentioned machining tool measuring device of FIG. 8 is combined, measurement data of temperature, vibration, and strain of the machining tool (cutting tool) 110 transmitted from the wireless transmission device 104e around the outer periphery of the tool holder main body 104a. The output signal of the above can be received by the wireless reception device 17 of the external unit 16 of FIG. 3 and transmitted to the recording / calculation device 19, and these data can be simultaneously displayed as an image on the output device 19.

When the measurement data is transmitted using the wireless communication device as shown in FIG. 3, it is easy to centrally manage and analyze the coolant information of the plurality of cutting devices 100 by one external unit 16. Although FIG. 3 shows an example in which the coolant information of a plurality of cutting devices 100 is directly transmitted to the external unit 16 by Wi-Fi or the like, the cutting devices 100 in different ring multiple factories are used as an external server (Cloud type server). An example of centralized management via (including) is shown in FIG. Details will be described later.

<< Abnormality detection flow by temperature and concentration >>
FIG. 4 shows an example of a flow chart showing abnormality detection by detecting the temperature and concentration of the coolan in the cutting apparatus 100 of FIGS. 1 to 3. Abnormality detection is performed by the storage / arithmetic unit 19 of FIG. First, when the detection by this system is started (STEP10), the maximum temperature (threshold value) tmax (top dead center), which is judged to be the limit point of the deterioration of the cooling performance of the Coolan, is set in each cutting device 100 (STEP11). ). The maximum temperature tmax (top dead center) may be a fixed temperature set according to each measurement position A to H, the manufacturer's recommended temperature, and the processing conditions, and is the temperature obtained by adding the limit temperature rise T from the initial temperature t0. = t0
+ T) may be set as the threshold value tmax.
Next, set the coolant concentration cmin (bottom dead center) and cmax (top dead center) (STEP 12). After that, the coolant temperature t during processing is measured at predetermined time intervals (STEP 13). Also, the concentration c is measured (STEP14). The concentration measurement in STEP14 may be a measurement that takes a longer time than the temperature measurement (this point will be explained in the flow chart of FIG. 5).

Next, it is determined whether or not the temperature t measured in STEP 13 is higher than the threshold temperature t max (STEP 15). As a result, if it is high, an abnormality detection warning is given as the coolant cooling performance has deteriorated (STEP 16). If no abnormality is detected by the temperature threshold, it is determined whether the c concentration measured in STEP 14 is within the range of cmin to cmax (STEP 17). If it is out of the range, a warning for abnormality detection is issued (STEP 16). If no abnormality is detected, the process returns to STEP 13 and repeats STEP 13 to STEP 17 continuously during machining. Although not shown in FIG. 4, when an abnormality is detected, the solvent is automatically supplied to the tank 112, and if the abnormality is not detected continuously in STEP13 to STEP17, the solvent is supplied to the throat, and when the abnormality is no longer detected, the solvent is supplied. It is also possible to add a control to stop the supply of solvent. By executing the example of FIG. 4 at a plurality of positions A to H, more accurate coolant evaluation can be performed. In this case, in addition to anomaly detection of whether or not the temperature of each of the positions A to H exceeds a predetermined threshold value, the temperature of each position changes every predetermined time with the lapse of the operating time of the cutting device 100 (same as above). It is also conceivable to detect the temperature difference over time at the position) and detect anomalies based on this amount of change. When the cutting device 100 is operated for a long time, it is possible to detect a case where the cooling performance of the coolant deteriorates as the operation progresses, and it is possible to avoid the risk of the cutting tool 110 breaking or the like during continuous operation for a long time.

<< Abnormality detection flow due to differences in temperature, concentration, and impurity content at multiple measurement positions >>
FIG. 5 shows an example of a flow chart showing abnormality detection by detecting the temperature and concentration of the coolant and the amount of impurities in the cutting device 100 as in FIG. In this example, unlike FIG. 4, a determination based on temperature information at two measurement positions (for example, positions A and C in FIG. 2) and a determination from the measurement of the amount of impurities are included. First, when the detection by this system is started (STEP20), the temperature tC of the coolant at the position (position C) ejected from the nozzle 154 and the position A (or the position H of the recovery flow path 153) near the discharge port to the tank 112. (Explanation at position A in FIG. 5)) Set the limit points Δt min (bottom dead point> and Δtmax (top dead point) of the temperature difference Δt from the temperature tA of the coolant (STEP 21). The temperature difference Δt is It is a value (temperature difference) indicating that the coolant liquid temperature has risen due to the injection from the nozzle 154 to the vicinity of the machining tool 110 and cooling of the machining tool 110 and the workpiece 109, and this value should be within a predetermined range. Therefore, it can be said that the coolant has high cooling performance (the degree of thermal expansion of the machining tool etc. can be known from the temperature difference, and the continuous machining accuracy can be detected). Therefore, the limit point of the deterioration of the coolant performance is set as the limit temperature difference Δtmin to Δtmax in advance. Can be set.

Next, the coolant concentration threshold cmin (bottom dead center) and cmax (top dead center) are set (STEP22), and the pH value is αmin (bottom dead center) and αmax (top dead center) to detect the amount of impurities. Is set (STEP23). After that, the coolant temperatures tA and tC at positions A and C during processing are measured at predetermined time intervals (STEP 23). In addition, the concentration c and the pH value α are also measured (STEP 24). As mentioned above, the concentration measurement and pH value measurement in STEP23 and STEP24 may be measured after a longer period of time than the temperature measurement, and since it is sufficient to measure them regularly, new measurements will be made until the specified update time comes. There is no need (STEP25), and when the update time comes, it will be measured again and updated (STEP26, STEP27).

After that, it is determined whether or not the temperature difference Δt measured in STEP 24 is within the range of the temperature difference Δtmin to Δtmax (STEP 28). As a result, if it is out of the range, an abnormality detection warning is given as the coolant cooling performance has deteriorated (STEP 31). If no abnormality is detected by the temperature threshold, it is determined whether the concentration measured / updated c in STEP26 is within the range of cmin to cmax (STEP29), and the pH value measured / updated in STEP27 is within the range of αmin to αmax. Judgment (STEP30) is performed, and if it is out of the range, an abnormality detection warning is issued (STEP31). If no abnormality is detected, the process returns to STEP24 and repeats STEP24 to STEP30 during machining.

In the example of FIG. 5, the abnormality of the coolant is detected from the difference between the temperature and concentration measurement data at the positions A (or H) and C of FIG. 2, but it is combined with the abnormality detection from the difference at other positions. May (positional difference). For example, (1) as the input side to the tank 112, the position A (near the discharge port to the tank 112), the position E (inside the tank 112), the position H (relief flow path 152), and the output side from the tank 112. Changes in temperature difference between position B (flow path 124a immediately after output from the pump 114) and position F (flow path 128 on the drain side from the relief valve), (2) Position D (from the spindle and inside the cutting tool 110) Abnormality detection can also be executed from the difference between the flow path 150) and the position G (flow path 152 from the spindle to the outside of the cutting tool 110).

In addition, in FIGS. 4 to 5 above, an example of the abnormality detection flow is shown from the temperature, concentration data, and pH value, but in addition, the discharge pressure data in the circulation pump in the circulation system at each position A to H, In addition to measuring the amount of impurities, it is also possible to detect abnormalities from the kinematic viscosity, color tone, transparency, turbidity, conductivity, etc. of the coolant.

Further, FIG. 9 shows an example of a configuration diagram of a coolant quality management system that centrally manages cutting devices 100 in different ring multiple factories via an external server (including a Cloud type server). The wireless transmission device 15 of the cutting device 100 in FIG. 9 is the same as the wireless transmission device 15 in FIG. This coolant quality management system is generally composed of a cutting device 100, a management device 1 (external server), and a user-owned information communication terminal 5 (including a mobile type). The management device 1 and the cutting device 100 are connected to each other via the Internet 2 by relaying the base station 6 from the wireless transmission device 15. The management device 1 and the information communication terminal 5 relay the base station 7 and further enable information communication via the Internet or the mobile phone communication network 4. However, the information communication between the management device 1 and the cutting device 100 and the information communication terminal 5 is assumed to be connected by, for example, the 3G or 4G method which is the communication method of the mobile phone in Japan, and the base stations 6 and 7 are assumed. May be replaced with a so-called access point or a wireless router to form a wireless connection, or when the information communication terminal 5 is a personal computer or the like, a wired or wireless LAN or the like may be used for the connection.

The management device 1 includes an application software unit for managing, calculating, and analyzing various measurement data such as coolant temperature information, a database unit for storing various measurement data, and a communication unit 14. Will be done. The application software section includes cutting device management application software 1a, anomaly analysis application software 1b, distribution application software 1c, and solvent supply application software 1h. The database section includes a cutting device database 1d and a user. It includes a database 1e (not shown), a threshold database 1f, a location database 1g, and a solvent database 1i. However, the configuration does not necessarily limit the physically independent device configuration, and one device may have a plurality of functions among the above.

The measurement data transmitted from the cutting device 100 is transmitted from the communication unit 1j of the management device 1 to the management application 1a. The management application software 1a reads the cutting device 1d according to the measurement data from the cutting device database 1d and distributes the corresponding cutting device data and the measurement data. The measurement data signal is transmitted to the Internet, etc. via the communication unit 1j by the application software 1c. Send to 4. Further, the management application software 1a constantly transmits the measurement data to the abnormality analysis application software 1b, and the abnormality analysis application software 1b reads the threshold value or numerical range corresponding to the cutting device from the threshold database 1f and measures the measurement. Whether or not the data is an abnormal value is analyzed, and if an abnormality is detected, the distribution application software 1c transmits an abnormality detection signal from the communication unit 1j to the Internet or the like 4.

When an abnormality is detected, the abnormality analysis application software 1b starts the solvent application software 1h via the management application software 1a, and the solvent application software 1h activates the solvent (amount and concentration) according to the cutting device. Is read from the solvent database and a solvent release signal is transmitted to the Internet 2 via the management application software 1a and the communication unit 1j. When the solvent release signal is transmitted to the Internet 2, it is transmitted to the wireless receiving device 100a of each cutting device 100 via the base station 6 to supply a required amount of solvent to the tank 112 of each cutting device 100. At this time, the solvent supply application software 1h simultaneously transmits the solvent supply signal to the Internet or the like 4 by the distribution application 1c and the communication unit 1j, and also transmits the information to the mobile communication terminal 5.

It should be noted that the solvent is supplied in real time when the solvent supply application software 1h determines the amount of the solvent required for the corresponding cutting device 100 or until the abnormality detection by the abnormality analysis application software 1b is completed. There are cases. When the abnormality detection is completed, the solvent supply stop signal is transmitted to the Internet 2 via the solvent supply application software 1h and the management application software 1a, and the solvent supply of the cutting apparatus 100 is stopped. At the same time, the solvent supply application software 1h transmits a solvent supply stop signal to the Internet or the like 4 via the distribution application 1e and the communication unit 1j, and also transmits information to the mobile communication terminal 5.

The information communication terminal 5 is assumed to be a multifunctional mobile terminal (including a multifunctional mobile phone (smartphone)), and includes a communication unit 5a, a control unit 5b, a storage unit 5e, and a display 5d. The signal (measurement data signal, abnormality detection signal, solvent supply signal, etc.) transmitted from the management device 1 is received by the communication unit 5a. Further, the storage unit 5e stores the operation system (hereinafter, also referred to as “OS”) 5f, and controls the information communication terminal 5 by the control unit 5b functioning as a processor.

In addition to the OS 5f, the storage unit 5e can store application software 5h for managing information communication with the management device 1 and displaying images of measurement data, and an image data set 5g. However, the storage unit 5e is not limited to a general flash memory or the like, and may be stored in the memory mounted on the control unit 5b also in the OS 5f. The image data set 5g is composed of a plurality of graph image data, abnormality detection display data, solvent supply image, etc., and the control unit 5b activates the application software 5h of the storage unit 5e from the signal transmitted from the management device 1, and the image data. The data read from the set 5g is combined and the measurement data is displayed on the display 5d.

It is premised that the user has previously installed the application software 5h for managing information communication with the management device 1 and displaying images of measurement data on the information communication terminal 5. Further, the management device 1 shows an example in which the solvent is automatically supplied to the tank 112 when an abnormality in the coolant is detected, but the user gives an instruction on the mobile communication terminal while checking the measurement data. An example of performing solvent supply is also conceivable.

If such a coolant management system is adopted, it is more advanced than the example in which the coolant information of the plurality of cutting devices 100 is directly transmitted to the external unit 16 by Wi-Fi or the like as shown in FIG. The cutting device 100 can be centrally managed and analyzed via an external server (including a Cloud type server).

"Example"
In FIGS. 6 and 7, temperature measurement and concentration measurement are actually performed at predetermined time intervals during processing, and temperature / concentration data transmitted by the wireless transmission device 15 is displayed on the display (output device) 20 of the storage / calculation device 19. An example of the graph is shown. In the upper part of FIG. 6, the measured concentration value (% by weight) of the coolant is shown on the vertical axis, and the measured time is shown on the horizontal axis. Further, in the lower part of FIG. 6, the temperature measurement value (° C.) of the coolant is shown on the vertical axis, and the measurement time is shown on the horizontal axis. Both the upper and lower stages show the measurement results in the tank 112 (position A in FIG. 2). The graph of FIG. 6 shows the data measured at predetermined time intervals in one of the plurality of processing devices (here, the IP address 192.168. assigned to the wireless device device 15 for each processing device). Refers to 11.136).

Further, FIG. 7 shows an input table of the temperature threshold value (° C.) for each of the plurality of processing devices (see the IP address machine No. and the machine name in the leftmost column). It will be understood that the temperature measurement information for each processing device is sequentially updated in this table. Therefore, it can be seen that the temperature information of the coolant quality of the plurality of processing devices is centrally managed by one storage / arithmetic unit 19 (the same applies to the concentration table, but the illustration is omitted here).

10 Temperature measuring means
11 Concentration measuring means
12 Impurity amount measuring means
13 Transmitter
14 controller
15 Wireless transmission device
16 External unit
17 Wireless reception device
18 Serial USB converter
19 Recording / Arithmetic Logic Unit
20 Output device
100 cutting equipment
101 spindle
102 work stage
102a Tread of the member to be machined
103 base
104 Tool Holder
105 Tool holder grip
106 Operation panel
107 head
108 Head abutment
109 Work member (work)
110 Machining tool
112 Storage container (tank)
114 pump
116, 118, 120 Solenoid valve
122 Valve unit (coolant supply unit)
124 Input flow path
124a Discharge flow path
126 relief valve
128 Drain flow path
129 Filter (filtration means)
130 1st supply route
132 Second supply route
134 Third supply route
136, 138,140 Check valve
142,144,144 throttle valve
148,150,152 Output flow path (connection flow path)
154 Injection nozzle (injection means)
160 control unit

Claims (19)

It is equipped with a temperature measuring means that can measure the temperature at least every predetermined time in the supply flow path of the coolant that cools the machining tool during the operation of the metal processing equipment and detect the change.
Optimal for the metal processing equipment and processing tools other than the control conditions specified in advance for the cooling oil by tracking and evaluating at least the change of the measurement information of the coolant including the temperature information measured from the temperature measuring means. It is a coolant quality detection system that detects conditions,
The temperature measuring means is the temperature in the storage container or the flow path for discharging the cooling liquid from the metal processing device into the storage container, or to the output side of the pump that supplies the cooling liquid from the storage container into the metal processing device. Measure the temperature inside the flow path and
The change in the measurement information of the cooling liquid is a cooling liquid quality detection system that detects the change with time of the temperature measured by the temperature measuring means . The temperature measuring means measures the temperature of the coolant in the flow path that supplies the coolant from the spindle side that grips the machining tool to the machining tool.
The cooling liquid quality detection system according to claim 1 , wherein the change in the measurement information of the cooling liquid detects the change with time of the temperature measured by the temperature measuring means. A coolant quality detection system that detects a temperature measured by the temperature measuring means according to claim 1 or a temperature difference exceeding a preset threshold value as an abnormality. A coolant quality detection system comprising a transmission means for detecting changes in various measurement information including temperature information measured from the temperature measurement means according to claim 1 and wirelessly transmitting the information to the outside. The coolant quality detection system according to claim 4 , wherein the temperature measurement by the temperature measuring means according to claim 1 is always performed in real time, and the temperature information is monitored. In the supply flow path of the coolant that cools the machining tool during the operation of the metal processing equipment, the coolant in the channel is separated and measured at a predetermined date and time or at a predetermined period, and the change can be tracked and evaluated. Equipped with various concentration measuring means
Coolant quality detection that detects the optimum conditions for the metal processing equipment and processing tools other than the control conditions specified in advance for the cooling oil by detecting at least the change in the concentration information of the coolant measured from the concentration measuring means. It ’s a system,
The concentration measuring means is in the storage container of the coolant, in the flow path for discharging the coolant from the metal processing device into the storage container, and in the flow path from the storage container to the output side of the pump supplied into the metal processing device. One of the flow path that supplies the coolant from the spindle side that grips the machining tool to the machining tool, or the flow path that supplies the coolant to the injection means that injects the coolant from the outside toward the machining tool. A coolant quality system that separates the coolant at the above positions and measures its concentration . A coolant quality detection system comprising a transmission means for detecting changes in various measurement information including concentration information measured from the concentration measuring means according to claim 6 and wirelessly transmitting the information to the outside. A coolant quality detection system that detects as an abnormality when the concentration measured by the concentration measuring means according to claim 6 or the change with time of the concentration at each measurement position exceeds a preset threshold value. An impurity extraction means capable of detecting the amount of impurities contained in the coolant at predetermined intervals or at a desired time in the supply flow path of the coolant that cools the machining tool while the metal processing apparatus is operating or stopped is provided.
The impurity extraction means is at least in the storage container of the coolant, in the flow path discharged from the metal processing device into the storage container, or from the storage container to the output side of the pump supplied into the metal processing device. It is a coolant quality detection system that detects the optimum conditions for the metal processing equipment and processing tools other than the control conditions specified in advance for the cooling oil by detecting the amount of impurities in the cooling oil.
The impurity detecting means is a cooling liquid quality detection system that analyzes the amount of impurities accumulated per unit area from the cooling liquid storage container to the filtration filter of the filtration device of the supply flow path included in the metal processing device. The cooling liquid quality detection system according to claim 9 , wherein the impurity detecting means measures the pH of the cooling liquid in the supply flow path. The cooling liquid quality detection system according to claim 9 , wherein the impurity detecting means measures the discharge pressure of a pump that supplies the cooling liquid from the storage container into the supply flow path of the metal processing apparatus. A pressure measuring means capable of detecting the pressure of the coolant at one or more positions in the supply flow path in the metal processing apparatus at a predetermined time or at a predetermined period is provided, and the pressure information measured from the pressure measuring means is provided. The coolant quality detection system according to any one of claims 9 to 11 , wherein the change is detected. Cooling that detects a change in pressure information obtained from the pressure measuring means according to claim 12 , and detects as an abnormality when the detected pressure or the difference in pressure at each detection position exceeds a preset threshold value. Liquid quality detection system. The difference between the temperature information and / or each temperature information from the temperature measuring means according to any one of claims 1 to 5 .
The concentration measuring means according to any one of claims 6 to 8 and / or the impurity detecting means according to any one of claims 9 to 11 and / or the pressure measuring means according to claim 12 or 13 . Information from the means, and
Coolant quality detection system that monitors in combination. It has a real-time measurement unit for the temperature, vibration, and / or strain processing state of the processing tool provided inside the processing tool of the metal processing equipment, and grips the processing tool or processing tool with the measurement results of the real-time measurement unit. The coolant quality detection system according to any one of claims 1 to 14 , further comprising a processing tool measuring device that receives and transmits to the outside by an electronic substrate provided inside the tool holder. A measuring means capable of measuring the kinematic viscosity, color tone, transparency, turbidity, and electrical conductivity of the coolant by separating the coolant in the supply flow path of the coolant that cools the machining tool during the operation of the metal processing equipment. Prepare,
Information from the measuring means
The temperature measuring means according to any one of claims 1 to 5 , and the temperature measuring means.
The concentration measuring means according to any one of claims 6 to 8 and / or the impurity detecting means according to any one of claims 9 to 11 and / or the pressure measuring means according to claim 12 or 13 . A coolant quality detection system equipped with a means and a means for transmitting measurement information to be transmitted to an external server together with measurement information from. A terminal transmission means for receiving measurement information from the measurement information transmission means of the coolant quality detection system according to claim 16 and transmitting the measurement information to one or more information terminals preset for each metal processing apparatus.
A determination means for determining whether or not any one or a plurality of measurement information received from the measurement information transmission means exceeds a preset threshold value or a numerical range is provided, and the determination means provides a threshold value or a numerical value. A coolant quality management system including a warning transmission means for transmitting warning information to the information terminal when it is determined that the range is exceeded. When any one or more of the measurement information received from the measurement information transmitting means is determined by the determination means to exceed the threshold value or out of the numerical range, the solvent is automatically stored. The coolant quality management system according to claim 17 , wherein the solvent is supplied into the container, and when it is determined by the determination means that the threshold value is not exceeded or the value is within the numerical range, the supply of the solvent is automatically stopped. The cooling according to claim 17 , wherein when any one or more of the measurement information received from the measurement information transmitting means receives the supply command information from the information terminal, the solvent is supplied into the storage container. Liquid management system.

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