Cutting fluid intelligent maintenance machine and dynamic maintenance method

Abstract

The invention relates to the technical field of cutting fluid maintenance for intelligent manufacturing, and particularly discloses an intelligent cutting fluid maintenance machine and a dynamic maintenance method. The intelligent maintenance machine is provided with a liquid supplementing main machine, and the liquid supplementing main machine is connected with a cutting fluid box of the corresponding machine tool through a liquid supplementing pipeline. A stock solution tank and a water tank which are relatively independently arranged, and a control host which is used for acquiring real-time detection data of the cutting fluid in the cutting fluid tank and controlling the stock solution tank and the water tank to discharge the fluid in proportion according to a set relation are arranged at the fluid supplementing host so as to dynamically supplement the cutting fluid to the cutting fluid tank. On the basis of the current situation that a single machine tool exists in a machining scene, the maintenance machine which intelligently and dynamically prepares finished product cutting fluid through carried water and stock solution and dynamically supplements the cutting fluid to the cutting fluid box of the corresponding machine tool is formed; indexes such as the liquid level and the concentration of the cutting fluid in the cutting fluid tank can be stably kept relative to the set corresponding threshold values all the time, manual participation is basically not needed in the whole cutting fluid maintenance process, and the intelligent degree is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of intelligent manufacturing of cutting fluid maintenance, in particular to a cutting fluid intelligent maintenance machine and a dynamic maintenance method. BACKGROUND

[0002] As an important working liquid in the process of metal cutting and grinding, cutting fluid is mainly used for cooling and lubricating tools and workpieces, therefore, various machine tools are basically equipped with cutting fluid tanks for storing cutting fluid, and the cutting fluid of each machine tool is used in a single machine tool circulation mode.

[0003] Based on the continuous evaporation of cutting fluid in the machining operation process of the machine tool, the workpiece and the iron chip carrying and other consumption characteristics, the cutting fluid stored in the cutting fluid tank is dynamically changing in terms of liquid level, concentration and other indicators, in order to ensure the reliable development of the machining operation of the machine tool, it is necessary to regularly inspect the cutting fluid tank and timely supplement the cutting fluid in the cutting fluid tank. For a long time, the cutting fluid state inspection and supplement in the cutting fluid tank are completed in an artificial way. Obviously, the artificial operation mode has the technical problems of low efficiency, high labor intensity, great waste, inconvenient data recording and statistics, etc. Moreover, due to the poor stability of the corresponding indicators caused by the subjective experience of the artificial operation, it directly brings adverse effects on the stability of the machining process, which is particularly prominent in the precision manufacturing of high-end energy equipment such as thermal power, nuclear power and gas turbine. It is known that the precision manufacturing of such high-end energy equipment has high technical requirements for the stability of the cutting fluid in the cutting fluid tank of the machine tool. In addition, for the precision manufacturing of high-end energy equipment such as thermal power, nuclear power and gas turbine, most of the machine tools used are large machine tools with large structure and volume, and the cutting fluid maintenance of such large machine tools usually needs the help of a crane, which makes the cutting fluid maintenance operation very inconvenient.

[0004] In recent years, with the gradual deepening of the intelligent manufacturing transformation of high-end equipment manufacturing, the technical transformation of cutting fluid supply for machine tools has attracted great attention in the industry. However, most of the current research results are focused on the centralized maintenance of cutting fluid for machine tool groups in discrete machining scenarios, and few involve intelligent dynamic maintenance of single cutting fluid. SUMMARY

[0005] The technical purpose of the present application is to provide a cutting fluid intelligent maintenance machine capable of dynamically monitoring the index change of the cutting fluid stored in the cutting fluid tank of a single machine tool, and intelligently and dynamically supplementing the cutting fluid, and a cutting fluid dynamic maintenance method based on the intelligent maintenance machine, in view of the particularity of the cutting fluid maintenance of the machine tool and the deficiencies of the prior art.

[0006] The technical purpose of the present application is realized by the technical scheme below, an intelligent maintenance machine for cutting fluid, the intelligent maintenance machine has a liquid supplementing host, the liquid supplementing host is connected with a cutting fluid tank of a corresponding machine tool through a liquid supplementing pipeline; The liquid supplementing host is provided with a raw liquid tank and a water tank arranged relatively independently, and a control host for acquiring real-time detection data of the cutting fluid in the cutting fluid tank and controlling the raw liquid tank and the water tank to discharge liquid in proportion according to a set relationship, so as to dynamically supplement the cutting fluid in the cutting fluid tank.

[0007] As one of the preferred technical schemes, the raw liquid tank of the liquid supplementing host is connected with the liquid supplementing pipeline through a first liquid discharging pipe, the first liquid discharging pipe is connected with a raw liquid pump and a raw liquid valve, and the controllers of the raw liquid pump and the raw liquid valve are respectively connected with the control host in signal connection; The water tank of the liquid supplementing host is connected with the liquid supplementing pipeline through a second liquid discharging pipe, the second liquid discharging pipe is connected with a water supplementing pump and a water supplementing valve, and the controllers of the water supplementing pump and the water supplementing valve are respectively connected with the control host in signal connection; The control host of the liquid supplementing host performs logical operation on the acquired real-time liquid level data and / or concentration data of the cutting fluid and a corresponding set relationship, and outputs control instructions to the connected raw liquid valve and / or water supplementing valve and corresponding pump according to the corresponding logical operation result.

[0008] Further, a liquid supplementing flowmeter is arranged on the first liquid discharging pipe, the liquid supplementing flowmeter is connected with the control host in signal connection and feeds back corresponding metering data to the control host; A water supplementing flowmeter is arranged on the second liquid discharging pipe, the water supplementing flowmeter is connected with the control host in signal connection and feeds back corresponding metering data to the control host.

[0009] As one of the preferred technical schemes, the control host collects liquid level data of the stored cutting fluid in the cutting fluid tank through a liquid level sensor and collects concentration data of the stored cutting fluid in the cutting fluid tank through a concentration sensor; The liquid level sensor and the concentration sensor are arranged in the cutting fluid tank respectively and are connected with the control host in signal connection; The control host stores a set liquid level threshold value, a set concentration threshold value, a set cutting fluid concentration matching relationship, and a relationship between the flow coefficient of each liquid supplementing valve and the opening time length.

[0010] Further, a compensation relationship for correcting the concentration data by temperature data is set in the control host; Correspondingly, the control host collects real-time temperature data of the stored cutting fluid in the cutting fluid tank through a temperature sensor, the temperature data is collected synchronously when the concentration data is collected, the obtained real-time temperature data is compensated and corrected to the current concentration data according to the compensation relationship. The temperature sensor is arranged in the cutting fluid tank.

[0011] Further, the control host is also provided with a pH threshold value; Correspondingly, the control host collects real-time pH data of the cutting fluid stored in the cutting fluid tank through the pH sensor, and monitors the health status of the cutting fluid in the cutting fluid tank by combining the obtained real-time pH data with the set pH threshold value; The pH sensor is arranged in the cutting fluid tank.

[0012] Further, the control host is also provided with a conductivity threshold value; Correspondingly, the control host collects real-time conductivity data of the cutting fluid stored in the cutting fluid tank through the conductivity sensor, and monitors the health status of the cutting fluid in the cutting fluid tank by combining the obtained real-time conductivity data with the set conductivity threshold value; The conductivity sensor is arranged in the cutting fluid tank.

[0013] As one of the preferred technical solutions, the control host is signal-connected with the upper computer; The upper computer is used to acquire and store data of the liquid supplement host during operation, statistically process the acquired data, and output control instructions to the control host or output early warning signals to the user.

[0014] As one of the preferred technical solutions, the liquid supplement host has a base and a case arranged on the base; The base and / or the case of the liquid supplement host has a cavity or a supporting platform for placing the stock solution tank and / or the water tank; The control host is arranged on the case; A plurality of groups of traveling wheels are connected to the bottom of the base of the liquid supplement host; A handrail for supporting hand-pushing operation is arranged on the case of the liquid supplement host.

[0015] A cutting fluid dynamic maintenance method based on the above-mentioned cutting fluid intelligent maintenance machine; In the control host, various set threshold values and logical relationships meeting technical requirements are stored according to the working performance of the currently connected machine tool; During the operation of the currently connected machine tool, the cutting fluid level, the cutting fluid concentration, the cutting fluid temperature, the cutting fluid pH value and the cutting fluid conductivity in the cutting fluid tank are dynamically monitored; wherein, the monitoring of the cutting fluid concentration is a set frequency detection mode, and the cutting fluid temperature is detected synchronously while the cutting fluid concentration is detected. For the state change of the cutting fluid stored in the cutting fluid tank, the following corresponding process is performed: If the liquid level of the cutting fluid stored in the cutting fluid tank is higher than the upper limit of the liquid level threshold, and the concentration of the cutting fluid is within the concentration threshold range, each liquid supplement valve is in a closed state; If the liquid level of the cutting fluid stored in the cutting fluid tank is lower than the lower limit of the liquid level threshold, and the concentration of the cutting fluid is within the concentration threshold range, the control host calculates the volume of the required liquid supplement and the concentration ratio of the liquid supplement based on the median of the liquid level threshold, the concentration ratio of the liquid supplement is calculated based on the set formula amount, and the corresponding opening duration is converted based on the flow coefficient of each liquid supplement valve, and the operation of each liquid supplement valve is controlled accordingly, and the corresponding flow meter is reviewed every second during the process until the planned supplement amount is met and each liquid supplement valve is closed; If the liquid level of the cutting fluid stored in the cutting fluid tank is within the liquid level threshold range, but the concentration of the cutting fluid is higher than the upper limit of the concentration threshold, the control host calculates the volume of the required liquid supplement and the concentration ratio of the liquid supplement based on the upper limit of the liquid level threshold, the concentrate of the concentration ratio of the liquid supplement is calculated based on the set low concentration limit, and the corresponding opening duration is converted based on the flow coefficient of each liquid supplement valve, and the operation of each liquid supplement valve is controlled accordingly, and the corresponding flow meter is reviewed every second during the process until the planned supplement amount is met and each liquid supplement valve is closed; If the liquid level of the cutting fluid stored in the cutting fluid tank is within the liquid level threshold range, but the concentration of the cutting fluid is lower than the lower limit of the concentration threshold, the control host calculates the volume of the required liquid supplement and the concentration ratio of the liquid supplement based on the upper limit of the liquid level threshold, the concentrate of the concentration ratio of the liquid supplement is calculated based on the set high concentration limit, and the corresponding opening duration is converted based on the flow coefficient of each liquid supplement valve, and the operation of each liquid supplement valve is controlled accordingly, and the corresponding flow meter is reviewed every second during the process until the planned supplement amount is met and each liquid supplement valve is closed; If the pH value of the cutting fluid stored in the cutting fluid tank exceeds the pH threshold range, it indicates that the current health status of the cutting fluid cannot meet the technical requirements, and the cutting fluid tank needs to be emptied and the cutting fluid needs to be replaced; If the real-time conductivity value of the cutting fluid stored in the cutting fluid tank exceeds the conductivity threshold range, it indicates that the current health status of the cutting fluid cannot meet the technical requirements, and the cutting fluid tank needs to be emptied and the cutting fluid needs to be replaced.

[0016] The beneficial technical effect of the present application is that the above technical measures are aimed at the particularity of cutting fluid maintenance of the above machine tool equipment and the current situation of single machine tool existing in machine tool scene, forming a maintenance machine which intelligently and dynamically configures finished cutting fluid with carried water and concentrated liquid (original liquid) and dynamically supplements cutting fluid for the cutting fluid tank corresponding to the machine tool, the maintenance machine dynamically monitors the dynamic changes of real-time indexes such as the liquid level and concentration of the cutting fluid in the cutting fluid tank, thereby taking the set corresponding threshold as the basis to control water supplement and / or original liquid supplement, and further realize the dynamic liquid supplement (liquid preparation) action, so that the indexes such as the liquid level and concentration of the cutting fluid in the cutting fluid tank are always stably maintained relative to the set corresponding threshold, which can effectively meet the high technical requirements of cutting fluid stability in the field of precision manufacturing of high-end energy equipment such as thermal power, nuclear power and gas turbine, the whole cutting fluid maintenance process basically does not need manual participation, the intelligent degree is high, and the maintenance machine can be relatively flexibly placed and moved according to the working condition demand on site, and the convenience is good. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is an architectural diagram of the maintenance machine of the present application.

[0018] Figure 2 It is a perspective view of the maintenance machine of the present application.

[0019] Figure 3 It is a perspective view of the maintenance machine of the present application. Figure 2

[0020] Figure 4 It is a control logic flow chart of the dynamic maintenance method of the present application.

[0021] Code meaning in the figure: 1 - liquid supplement host; 11 - original liquid tank; 12 - original liquid pump; 13 - original liquid valve; 14 - liquid supplement flowmeter; 15 - water tank; 16 - water pump; 17 - water valve; 18 - water flowmeter; 19 - control host; 2 - cutting fluid tank; 21 - liquid level sensor; 22 - concentration sensor; 23 - temperature sensor; 24 - pH sensor; 25 - conductivity sensor; 3 - liquid supplement pipeline; 31 - first liquid discharge pipe; 32 - second liquid discharge pipe; 4 - upper computer. DETAILED DESCRIPTION

[0022] The present application relates to the field of intelligent manufacturing cutting fluid maintenance technology, in particular to a cutting fluid intelligent maintenance machine based on single machine tool and a cutting fluid dynamic maintenance method based on the maintenance machine, the main technical scheme content of the present application will be specifically described below in combination with multiple embodiments. Among them, embodiment 1 combines the drawings of the specification, namely Figure 1 、 Figure 2 、 Figure 3 and Figure 4 ​The technical solution content of the present application is clearly and in detail explained; other embodiments, although not separately drawn, can still refer to the drawings of embodiment 1 for the main structure.

[0023] It needs to be particularly pointed out that the drawings of the present application are schematic, unnecessary details have been simplified in order to clarify the technical purpose of the present application, in order to avoid obscuring the technical solution contributed by the present application to the prior art. In addition, the expressions "about", "basically" and the like in the following regarding quantity or matching relationship mean that the industry reasonably allows the existence of assembly error, machining error, etc., and is not an absolute quantity or matching relationship expressed literally.

[0024] Embodiment 1 Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the present application is a single machine (i.e. single machine) cutting fluid maintenance machine, which comprises a liquid supplementing main machine 1 connected with the cutting fluid tank 2 of the corresponding machine tool through a liquid supplementing pipeline 3 to realize dynamic supplementing of cutting fluid in the cutting fluid tank 2.

[0025] As shown in Figure 2 and Figure 3 , the liquid supplementing main machine 1 has a base and a machine case arranged on the base, the machine case is fixedly connected to the top of the base and surrounds a cavity space capable of placing the raw liquid tank 11 on the base.

[0026] Among them, in order to adapt to the adjustment requirements of the on-site working conditions, four groups of walking wheels are connected at the four corners of the bottom of the base, and the liquid supplementing main machine 1 can walk and displace through the walking wheels to enhance the flexibility of its arrangement position on site. In order to facilitate the application of force to the liquid supplementing main machine 1 and make it walk and displace, a handrail (not shown in the figure) is arranged on the machine case of the liquid supplementing main machine 1 for supporting the hand-pushing operation. On the ground beside the liquid supplementing main machine 1, a water tank 5 matched with the raw liquid tank 11 carried by the liquid supplementing main machine 1 is arranged. Of course, if the cavity space surrounded by the machine case is large enough, the water tank 15 can also be arranged in the cavity space, or the base outside the machine case can be extended to place the water tank 15 and form a support platform for the water tank 15; similarly, the raw liquid tank 11 can also be arranged on the support platform on the ground or the base beside the liquid supplementing main machine 1. However, regardless of which arrangement, at least the liquid supplementing main machine 1 has the raw liquid tank 11 and the water tank 15, and a control main machine 19 for controlling the raw liquid tank 11 and the water tank 15 to discharge liquid in a set proportion and prepare finished cutting fluid. The display screen of the control main machine 19 is arranged at a corner of the top of the machine case, and the control main machine 19 is arranged at an angle on the top of the machine case to facilitate observation and operation.

[0027] That is, as shown in Figure 1As shown, the maintenance machine of the present application has a liquid supplement host 1 connected with the cutting fluid tank 2 of the corresponding machine tool through a liquid supplement pipeline 3, and the liquid supplement host 1 has a raw liquid tank 11 and a water tank 15 arranged relatively independently, and a control host 19 for acquiring real-time detection data of the cutting fluid in the cutting fluid tank 2 and controlling the raw liquid tank 11 and the water tank 15 to discharge liquid in proportion according to a set relationship, so as to dynamically supplement the cutting fluid in the cutting fluid tank 2.

[0028] Specifically, as shown, Figure 1 The raw liquid tank 11 of the liquid supplement host 1 is connected with the liquid supplement pipeline 3 through a first liquid discharge pipe 31, and the downstream end of the first liquid discharge pipe 31 is sealingly connected with the upstream end of the liquid supplement pipeline 3; the first liquid discharge pipe 31 is sequentially connected with a raw liquid pump 12, a raw liquid valve 13 and a liquid supplement flow meter 14, the controllers of the raw liquid pump 12 and the raw liquid valve 13 are respectively signal-connected with the control host 19, and the control host 19 outputs corresponding control actions to the raw liquid pump 12 and the raw liquid valve 13, and the liquid supplement flow meter 14 is also signal-connected with the control host 19, and the liquid supplement flow meter 14 feeds back corresponding measurement data to the control host 19. The water tank 15 of the liquid supplement host 1 is connected with the liquid supplement pipeline 3 through a second liquid discharge pipe 32, and the downstream end of the second liquid discharge pipe 32 is sealingly connected with the upstream end of the liquid supplement pipeline 3; the second liquid discharge pipe 32 is sequentially connected with a water supplement pump 16, a water supplement valve 17 and a water supplement flow meter 18, the controllers of the water supplement pump 16 and the water supplement valve 17 are respectively signal-connected with the control host 19, and the control host 19 outputs corresponding control actions to the water supplement pump 16 and the water supplement valve 17, and the water supplement flow meter 18 is also signal-connected with the control host 19, and the water supplement flow meter 18 feeds back corresponding measurement data to the control host 19. In this way, the control host 19 of the liquid supplement host 1 performs logical operation on the acquired real-time liquid level data and / or concentration data of the cutting fluid and the corresponding set relationship, and outputs control instructions to the connected raw liquid valve 13 and / or water supplement valve 17 and corresponding pumps according to the corresponding logical operation results, so as to realize liquid preparation according to the set technical requirements.

[0029] For the convenience of operation management, the above-mentioned liquid supplement host 1 is also connected with the upper computer 4 through remote signal, and the data of the operation of the liquid supplement host 1 is stored and statistically analyzed by the upper computer 4, and the corresponding control instructions of the liquid supplement host 1 are issued, and the user output warning signal is outputted. More specifically, the control host 19 of the liquid supplement host 1 is connected with the upper computer 4 through wired network / wireless network, and the collected data is transmitted to the upper computer 4, and the remote control of the upper computer 4 is accepted. The upper computer 4 as an industrial computer stores, classifies, counts and shares the data transmitted by the control host 19, and outputs the operation report and the warning information to the user according to the statistical data, and outputs the remote control instructions of the control host 19, including modifying the set threshold value, and opening / closing the liquid supplement valve. In this way, the liquid supplement control of the above-mentioned liquid supplement host 1 to the matched cutting fluid tank 2 can be relatively independent and autonomous, and is not interfered by the network interruption and power failure of the upper computer 4.

[0030] In the above-mentioned liquid supplement host 1, the concentrated liquid tank 11 is used for storing the concentrated liquid, and the concentrated liquid is pumped by the first liquid discharge pipe 31. The concentrated liquid needs to be mixed with pure water in a certain proportion to be a finished product. The concentrated liquid pump 12 is located upstream of the concentrated liquid valve 13, and the concentrated liquid pump 12 is used for pumping the concentrated liquid stored in the concentrated liquid tank 11 through the first liquid discharge pipe 31. The concentrated liquid valve 13 is used for controlling the opening / closing of the first liquid discharge pipe 31, and the concentrated liquid valve 13 adopts an electric valve structure. The liquid supplement flow meter 14 is located downstream of the concentrated liquid valve 13, and is used for monitoring the flow of the passing liquid supplement.

[0031] In the above-mentioned liquid supplement host 1, the water tank 15 is used for storing the deionized water, and the deionized water is pumped by the second liquid discharge pipe 32. The water supplement pump 16 is located upstream of the water supplement valve 17, and the water supplement pump 16 is used for pumping the deionized water stored in the water tank 15 through the second liquid discharge pipe 32. The water supplement valve 17 is used for controlling the opening / closing of the second liquid discharge pipe 32, and the water supplement valve 17 adopts an electric valve structure. The water supplement flow meter 18 is located downstream of the water supplement valve 17, and is used for monitoring the flow of the passing water supplement.

[0032] In order to dynamically supplement the cutting fluid tank 2, the above-mentioned liquid supplement host 1 needs to obtain the real-time state of the cutting fluid stored in the cutting fluid tank 2, so the liquid level data, concentration data, temperature data, pH data and conductivity data of the cutting fluid stored in the cutting fluid tank 2 need to be collected. Therefore, in the cutting fluid tank 2, the liquid level sensor 21 for detecting the real-time liquid level of the cutting fluid, the concentration sensor 22 for detecting the real-time concentration of the cutting fluid, the temperature sensor 23 for detecting the real-time temperature of the cutting fluid, the pH sensor 24 for detecting the real-time pH value of the cutting fluid, and the conductivity sensor 25 for detecting the real-time conductivity of the cutting fluid are arranged.

[0033] Through real-time detection of the cutting fluid level, the consumption of the cutting fluid stored in the cutting fluid tank 2 can be determined to determine the volume of dynamic replenishment of the cutting fluid, so that the cutting fluid in the cutting fluid tank 2 is always in an allowable level state. Of course, to prevent the liquid level in the cutting fluid tank 2 from overflowing when replenishing, a float sensor is also arranged in the cutting fluid tank 2, which is used as a signal output for the cutting fluid stored in the cutting fluid tank 2 exceeding the limit level and not being allowed to be added. The control host 19 also collects the signal of the float sensor in the cutting fluid tank 2, and uses the signal of the float sensor as a bottom line for the upper limit of the liquid level to prevent liquid overflow during replenishment, thereby forming a safety redundant configuration.

[0034] Through real-time detection of the concentration of the cutting fluid, the change in the concentration of the cutting fluid stored in the cutting fluid tank 2 during consumption can be determined to dynamically adjust the concentration of the cutting fluid according to the design technical requirements of the cutting fluid concentration, so as to avoid the disadvantages caused by the imbalance of the concentration of the cutting fluid in the cutting fluid tank 2. If the concentration of the cutting fluid is too low, it cannot meet the technical functions of cooling and lubrication in machining; if the concentration of the cutting fluid is too high, it not only increases the cost, but also directly affects the health of the machining personnel. Therefore, through dynamic replenishment, the concentration of the cutting fluid in the cutting fluid tank 2 can be ensured to always be in a state allowed by the design.

[0035] As for the real-time detection of the temperature of the cutting fluid stored in the cutting fluid tank 2, the change in the temperature of the cutting fluid has a direct impact on the detection result of the concentration, so that the concentration data detected synchronously can be compensated and corrected through real-time detection of the temperature of the cutting fluid. The specific correction and compensation relationship can be determined by measuring the influence of different temperature changes on the detection result of the concentration sensor, so as to calculate the coefficient of the temperature value relative to the concentration detection value, and correct the concentration detection result by changing the different coefficients. In this way, the detection of the concentration of the cutting fluid and the detection of the temperature should be carried out synchronously, i.e., the concentration detection and the temperature detection should be carried out synchronously according to the set detection frequency, which can be different from the liquid level detection or the pH detection. Of course, the liquid level detection, the pH detection, the conductivity detection and the temperature detection can be carried out in real time, and the concentration detection can be carried out at a set frequency.

[0036] Through real-time detection of the pH value of the cutting fluid stored in the cutting fluid tank 2, the health status of the cutting fluid can be determined through the change in the pH value of the cutting fluid.

[0037] Through real-time detection of the conductivity of the cutting fluid stored in the cutting fluid tank 2, the health status of the cutting fluid can be determined through the change in the impurity content of the cutting fluid.

[0038] In order to realize the intelligent dynamic liquid supplementing action of the above-mentioned liquid supplementing host 1, in addition to the above-mentioned hardware structure, a corresponding logical control relationship realized through programmed software is also needed, which is mainly realized through the control host 19. The control host 19, as an edge computer, sets index parameter thresholds for the state of the cutting fluid stored in the cutting fluid tank 2 according to the working performance of the machine tool served, including setting the liquid level threshold, the concentration threshold, the pH threshold, the conductivity threshold, and setting the concentration ratio relationship of the cutting fluid (i.e. the ratio of water and concentrated liquid), the correction relationship of the concentration influence of the cutting fluid temperature change, the flow coefficient and opening time relationship of the liquid supplementing valve, etc.

[0039] The concentration ratio relationship of the above-mentioned cutting fluid is divided into three cases. The first case is that in the liquid supplementing working condition environment, the real-time concentration of the cutting fluid is within the set threshold range, at this time the normal formula amount can be added according to the conventional normal formula. The second case is that in the liquid supplementing working condition environment, the real-time concentration data of the cutting fluid exceeds the upper limit of the set threshold and is in a high concentration state, so the concentration needs to be reduced to the concentration threshold range in the liquid supplementing, and therefore the addition amount of the original liquid needs to be added according to the set low concentration limit value at this time. The third case is that in the liquid supplementing working condition environment, the real-time concentration data of the cutting fluid exceeds the lower limit of the set threshold and is in a low concentration state, so the concentration needs to be increased to the concentration threshold range in the liquid supplementing, and therefore the addition amount of the original liquid needs to be added according to the set high concentration limit value at this time. The acquisition of the aforementioned low concentration limit value and high concentration limit value has two ways, one is the empirical value based on big data statistics, and the high concentration limit value is usually 5% and the low concentration limit value is usually 1%; the other is to obtain through the difference between the real-time concentration data and the concentration threshold.

[0040] As described above, the control host 19 of the liquid supplementing host 1 is used to collect the real-time liquid level data, real-time concentration data, real-time temperature data, real-time pH data and real-time conductivity data in the cutting fluid tank 2, that is, the control host 19 is signal connected with the liquid level sensor 21, the concentration sensor 22, the temperature sensor 23, the pH sensor 24 and the conductivity sensor 25 in the cutting fluid tank 2.

[0041] The control host 19 of the liquid supplementing host 1 performs logical operation on the collected real-time detection data with the set corresponding threshold, including comparison of the real-time liquid level data with the set liquid level threshold and calculation of the liquid level difference; correction of the current real-time concentration data by the coefficient corresponding to the real-time temperature data, comparison of the corrected concentration data with the set concentration threshold and calculation of the concentration difference; comparison of the real-time pH data with the set pH threshold; comparison of the real-time conductivity data with the set conductivity threshold; analysis of the opening time of the flow coefficient of the water supplementing valve 17 and the original liquid valve 13 corresponding to the liquid supplementing amount and the water supplementing amount, etc.

[0042] The control host 19 of the liquid supplement host 1 outputs liquid supplement control instructions to the raw liquid valve 13 and the raw liquid pump 12 connected to the first liquid discharge pipe 31 according to the results of corresponding logical operations, including: opening the raw liquid valve 13 and setting the time length, closing the raw liquid valve 13; and corresponding on / off of the raw liquid pump 12; and outputs liquid supplement control instructions to the water supplement valve 17 and the water supplement pump 16 connected to the second liquid discharge pipe 32, including: opening the water supplement valve 17 and setting the time length, closing the water supplement valve 17; and corresponding on / off of the water supplement pump 16. That is, the control host 19 is also signal connected with the raw liquid valve 13 and the raw liquid pump 12 connected to the first liquid discharge pipe 31, and the water supplement valve 17 and the water supplement pump 16 connected to the second liquid discharge pipe 32, so that the control host 19 controls the liquid supplement action of the raw liquid valve 13 and / or the water supplement valve 17 and the corresponding pump, and realizes the set liquid level and the dynamic supplement of the cutting fluid in the cutting fluid tank 2 under the concentration index. In addition, the control host 19 of the liquid supplement host 1 compares the obtained real-time pH data with the set pH threshold value to monitor the health status of the cutting fluid in the cutting fluid tank 2 due to the change of the acid-base degree, and outputs a warning signal for the cutting fluid with abnormal health status; and compares the obtained real-time conductivity data with the set conductivity threshold value to monitor the health status of the cutting fluid in the cutting fluid tank 2 due to the change of the impurity content, and outputs a warning signal for the cutting fluid with abnormal health status.

[0043] As shown in Figure 4 A dynamic maintenance method based on the above cutting fluid intelligent maintenance machine, as described above, the cutting fluid level threshold, the cutting fluid concentration threshold, the cutting fluid pH threshold, the cutting fluid conductivity threshold, the cutting fluid concentration ratio relationship, the correction relationship of the cutting fluid temperature change on the concentration, and the flow coefficient and opening time length relationship of the liquid supplement valve need to be set in advance in the control host according to the working performance of the connected machine tool. During the operation of the machine tool, the real-time cutting fluid level, the real-time cutting fluid concentration, the real-time cutting fluid pH value, the real-time cutting fluid temperature and the real-time conductivity in the cutting fluid tank are dynamically monitored.

[0044] Among them, the monitoring of cutting fluid level, cutting fluid pH value, cutting fluid temperature and cutting fluid conductivity adopts continuous real-time detection mode, and the monitoring of cutting fluid concentration adopts detection mode with set frequency, that is, detection once every 10 minutes.

[0045] According to different changes of the state of the cutting fluid in the cutting fluid tank due to consumption, the following corresponding processes are executed: If the liquid level of the cutting fluid stored in the cutting fluid tank is higher than the upper limit of the liquid level threshold, and the cutting fluid concentration is within the concentration threshold range, no liquid is supplemented, and each liquid supplement valve is in the closed state; If the liquid level of the cutting fluid stored in the cutting fluid tank is lower than the lower limit of the liquid level threshold, and the concentration of the cutting fluid is within the concentration threshold range, the control host calculates the volume of the required replenishment and the concentration ratio of the replenishment based on the middle value of the liquid level threshold according to the current actual liquid level. The replenishment concentration ratio is calculated according to the set normal formula amount. Then, the water replenishment amount and the raw liquid replenishment amount are determined according to the clear relationship between the replenishment volume and the concentration ratio. The opening time of the water replenishment valve is determined according to the clear water replenishment amount and the flow coefficient of the water replenishment valve. The opening time of the raw liquid valve is determined according to the raw liquid replenishment amount and the flow coefficient of the raw liquid valve. The replenishment action of the water replenishment valve and the raw liquid valve and the corresponding pump is controlled in this way. The replenishment flow meter is reviewed every second during the replenishment action of the water replenishment valve. The replenishment flow meter is reviewed every second during the replenishment action of the raw liquid valve. The control host corrects the control command of the corresponding replenishment valve according to the review result of the corresponding flow meter. The cycle is repeated until the liquid level of the cutting fluid stored in the cutting fluid tank meets the planned replenishment amount, and each replenishment valve is closed, forming a closed-loop feedback control. If the liquid level of the cutting fluid stored in the cutting fluid tank is within the liquid level threshold range, but the concentration of the cutting fluid is higher than the upper limit of the concentration threshold, the control host calculates the volume of the required replenishment and the concentration ratio of the replenishment based on the upper limit of the liquid level threshold according to the current actual liquid level. The raw liquid addition amount of the replenishment concentration ratio is calculated according to the set low concentration limit value (usually 1%). Then, the water replenishment amount and the raw liquid replenishment amount are determined according to the clear relationship between the replenishment volume and the concentration ratio. The opening time of the water replenishment valve is determined according to the clear water replenishment amount and the flow coefficient of the water replenishment valve. The opening time of the raw liquid valve is determined according to the raw liquid replenishment amount and the flow coefficient of the raw liquid valve. The replenishment action of the water replenishment valve and the raw liquid valve and the corresponding pump is controlled in this way. The replenishment flow meter is reviewed every second during the replenishment action of the water replenishment valve. The replenishment flow meter is reviewed every second during the replenishment action of the raw liquid valve. The control host corrects the control command of the corresponding replenishment valve according to the review result of the corresponding flow meter, and dynamically detects the concentration of the cutting fluid stored in the cutting fluid tank. The cycle is repeated until the concentration of the cutting fluid stored in the cutting fluid tank meets the planned replenishment amount, and each replenishment valve is closed, forming a closed-loop feedback control. If the liquid level of the cutting fluid stored in the cutting fluid tank is within the liquid level threshold range, but the cutting fluid concentration is lower than the lower concentration threshold, the control host calculates the volume of the required replenishment and the replenishment concentration ratio according to the current actual liquid level based on the upper limit of the liquid level threshold. The raw liquid addition amount of the replenishment concentration ratio is calculated based on the set high concentration limit (usually 5%). Then, the water replenishment amount and the raw liquid replenishment amount are determined based on the clear replenishment volume and concentration ratio relationship. Then, the opening time of the water replenishment valve is determined based on the clear water replenishment amount and the flow coefficient of the water replenishment valve, and the opening time of the raw liquid valve is determined based on the raw liquid replenishment amount and the flow coefficient of the raw liquid valve. Thus, the replenishment actions of the water replenishment valve and the raw liquid valve are controlled. During the replenishment action of the water replenishment valve, the replenishment flow meter is reviewed every second, and during the replenishment action of the raw liquid valve, the replenishment flow meter is reviewed every second. The control host corrects the control command of the corresponding replenishment valve based on the review result of the corresponding flow meter, and dynamically detects the concentration of the cutting fluid stored in the cutting fluid tank. Thus, the cycle is repeated until the concentration of the cutting fluid stored in the cutting fluid tank meets the planned replenishment amount, and each replenishment valve is closed, forming a closed-loop feedback control. If the real-time pH value of the cutting fluid stored in the cutting fluid tank exceeds the pH threshold range, it indicates that the current cutting fluid has abnormal pH value and cannot meet the technical requirements. Warning information is output to remind the emptying and replacement of the cutting fluid tank. If the real-time conductivity value of the cutting fluid stored in the cutting fluid tank exceeds the conductivity threshold range, it indicates that the current cutting fluid has abnormal impurity content and cannot meet the technical requirements. The cutting fluid tank is emptied and replaced.

[0046] Embodiment 2 The other contents of this embodiment are the same as those of Embodiment 1, except that: The raw liquid tank of the replenishment host is directly connected to the cutting fluid tank through the first liquid discharge pipe. The water tank of the replenishment host is directly connected to the cutting fluid tank through the second liquid discharge pipe.

[0047] That is, this embodiment cancels the summary replenishment pipeline, making the connection pipe structure between the replenishment host and the cutting fluid tank not conducive to compactness.

[0048] Embodiment 3 The other contents of this embodiment are the same as those of Embodiment 1, except that: The pH sensor arrangement in the cutting fluid tank is cancelled, and the real-time collection of pH data and the monitoring of the cutting fluid health state based on the pH data are also cancelled.

[0049] Embodiment 4 The other contents of this embodiment are the same as those of Embodiment 1, except that: The flow meter (including the make-up water flow meter and the make-up liquid flow meter) is removed, and the monitoring and review functions of the make-up liquid flow are also eliminated accordingly; The host computer is controlled to calculate the determined make-up liquid amount and the corresponding valve opening time, and the dynamic monitoring of the change of the cutting liquid level and the change of the concentration of the cutting liquid in the cutting liquid tank during the make-up liquid process is repeated, and this can also be achieved.

[0050] Embodiment 5 The other contents of this embodiment are the same as those of Embodiment 1, and the difference lies in that: The arrangement of the conductivity sensor in the cutting liquid tank is cancelled, and the real-time collection of the conductivity data and the monitoring of the health state of the cutting liquid by using the conductivity data are also eliminated accordingly.

[0051] The above embodiments are only used to illustrate the present application, and not to limit it.

[0052] Although the present application is described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions of the above embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the present application.

Claims

1. A cutting fluid intelligent maintenance machine, characterized in that: The intelligent maintenance machine has a fluid replenishment host (1), which is connected to the cutting fluid tank (2) of the corresponding machine tool through a fluid replenishment pipeline (3); The fluid replenishment host (1) has a raw fluid tank (11) and a water tank (15) arranged relatively independently, as well as a control host (19) that acquires real-time detection data of the cutting fluid in the cutting fluid tank (2) and controls the raw fluid tank (11) and the water tank (15) to discharge liquid in proportion according to a set relationship, so as to dynamically replenish the cutting fluid in the cutting fluid tank (2).

2. The intelligent cutting fluid maintenance machine according to claim 1, characterized in that: The original liquid tank (11) of the replenishment host (1) is connected to the replenishment pipeline (3) through the first drain pipe (31). The first drain pipe (31) is connected to the original liquid pump (12) and the original liquid valve (13). The controllers of the original liquid pump (12) and the original liquid valve (13) are respectively connected to the control host (19). The water tank (15) of the replenishment host (1) is connected to the replenishment pipeline (3) through the second drain pipe (32). The second drain pipe (32) is connected to the water replenishment pump (16) and the water replenishment valve (17). The controllers of the water replenishment pump (16) and the water replenishment valve (17) are respectively connected to the control host (19). The control host (19) of the fluid replenishment host (1) performs logical operations on the real-time fluid level data and / or concentration data of the acquired cutting fluid with the corresponding set relationship, and outputs control commands to the connected original fluid valve (13) and / or water replenishment valve (17) and the corresponding pump with the corresponding logical operation results.

3. The intelligent cutting fluid maintenance machine according to claim 2, characterized in that: The first drain pipe (31) is also equipped with a replenishment flow meter (14), which is connected to the control host (19) and feeds back the corresponding metering data to the control host (19). The second drain pipe (32) is also equipped with a water replenishment flow meter (18), which is connected to the control host (19) and feeds back the corresponding metering data to the control host (19).

4. The intelligent cutting fluid maintenance machine according to claim 1, 2 or 3, characterized in that: The control host (19) collects the liquid level data of the cutting fluid stored in the cutting fluid tank (2) through the liquid level sensor (21) and collects the concentration data of the cutting fluid stored in the cutting fluid tank (2) through the concentration sensor (22). The liquid level sensor (21) and the concentration sensor (22) are respectively arranged in the cutting fluid tank (2) and are signal connected to the control host (19); The control host (19) stores the set liquid level threshold, concentration threshold, cutting fluid concentration ratio, and the relationship between the flow coefficient and opening time of each replenishment valve.

5. The intelligent cutting fluid maintenance machine according to claim 4, characterized in that: The control host (19) is also equipped with a compensation relationship that corrects concentration data with temperature data; Correspondingly, the control host (19) collects the real-time temperature data of the cutting fluid stored in the cutting fluid tank (2) through the temperature sensor (23). The temperature data is collected synchronously when collecting the concentration data, and the real-time temperature data obtained is used to compensate and correct the current concentration data according to the compensation relationship. The temperature sensor (23) is arranged inside the cutting fluid tank (2).

6. The intelligent cutting fluid maintenance machine according to claim 4, characterized in that: The control host (19) also has a pH threshold set; Correspondingly, the control host (19) collects real-time pH data of the cutting fluid stored in the cutting fluid tank (2) through the pH sensor (24), and monitors the health status of the cutting fluid in the cutting fluid tank (2) by combining the obtained real-time pH data with the set pH threshold. The pH sensor (24) is arranged inside the cutting fluid tank (2).

7. The intelligent cutting fluid maintenance machine according to claim 4, characterized in that: The control host (19) also has a conductivity threshold set inside; Correspondingly, the control host (19) collects real-time conductivity data of the cutting fluid stored in the cutting fluid tank (2) through the conductivity sensor (25), and monitors the health status of the cutting fluid in the cutting fluid tank (2) by combining the obtained real-time conductivity data with the set conductivity threshold. The conductivity sensor (25) is arranged inside the cutting fluid tank (2).

8. The intelligent cutting fluid maintenance machine according to claim 1, 2 or 3, characterized in that: The control host (19) is connected to the host computer (4) via signals; The host computer (4) is used to acquire and store data of the fluid replenishment host (1) during operation, perform statistical processing on the acquired data, and output control commands to the control host (19) or warning signals to the user.

9. The intelligent cutting fluid maintenance machine according to claim 1 or 2, characterized in that: The fluid replenishment unit (1) has a base and a chassis arranged on the base; The base and / or chassis of the replenishment host (1) have a cavity or support platform for placing the original liquid tank (11) and / or the water tank (14); The control host (19) is arranged on the chassis; At the bottom of the base of the fluid replenishment host (1), there are multiple sets of walking wheels; The casing of the fluid replenishment unit (1) is provided with handrails for manual operation.

10. A method for dynamic maintenance of cutting fluid, characterized in that: The cutting fluid dynamic maintenance method is based on the intelligent cutting fluid maintenance machine according to any one of claims 1 to 9; Within the control host, various set thresholds and logical relationships that meet technical requirements are stored for the working performance of the currently connected machine tool; During the operation of the currently connected machine tool, the cutting fluid level, concentration, temperature, pH value, and conductivity in the cutting fluid tank are dynamically monitored. The monitoring of the cutting fluid concentration is performed using a set frequency detection method, and the cutting fluid temperature is detected simultaneously with the detection of the cutting fluid concentration. For changes in the state of the cutting fluid stored in the cutting fluid tank, the following corresponding procedures are executed: If the level of cutting fluid stored in the cutting fluid tank is higher than the upper limit of the level threshold, and the concentration of cutting fluid is within the concentration threshold range, all replenishment valves are closed. If the level of the cutting fluid stored in the tank is lower than the lower limit of the level threshold and the concentration of the cutting fluid is within the concentration threshold range, the control host calculates the volume of fluid to be replenished and the concentration ratio of the replenishment fluid based on the median of the level threshold. The concentration ratio of the replenishment fluid is calculated based on the set formula amount and the corresponding opening time is converted by the flow coefficient of each replenishment valve. Based on this, the operation of each replenishment valve is controlled. During the process, the corresponding flow meter is checked every second until the planned replenishment amount is met and then each replenishment valve is closed. If the level of the cutting fluid stored in the tank is within the level threshold range, but the concentration of the cutting fluid is higher than the upper limit of the concentration threshold, the control host calculates the volume and concentration ratio of the required replenishment fluid based on the upper limit of the level threshold. The concentration ratio of the replenishment fluid is calculated based on the set low concentration limit, and the corresponding opening time is converted by the flow coefficient of each replenishment valve. The operation of each replenishment valve is controlled accordingly. During the process, the corresponding flow meter is checked every second until the planned replenishment amount is met and then each replenishment valve is closed. If the level of the cutting fluid stored in the tank is within the level threshold range, but the concentration of the cutting fluid is lower than the lower limit of the concentration threshold, the control host calculates the volume and concentration ratio of the required replenishment fluid based on the upper limit of the level threshold. The concentration ratio of the replenishment fluid is calculated based on the set high concentration limit, and the corresponding opening time is converted by the flow coefficient of each replenishment valve. The operation of each replenishment valve is controlled accordingly. During the process, the corresponding flow meter is checked every second until the planned replenishment amount is met and then each replenishment valve is closed. If the pH value of the cutting fluid stored in the cutting fluid tank exceeds the pH threshold range, it indicates that the current health status of the cutting fluid does not meet the technical requirements, and the cutting fluid tank needs to be emptied and the cutting fluid replaced. If the real-time conductivity value of the cutting fluid stored in the cutting fluid tank exceeds the conductivity threshold range, it indicates that the current health status of the cutting fluid does not meet the technical requirements, and the cutting fluid tank should be emptied and the cutting fluid replaced.

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