Numerical control cutter grinding machine tool

Abstract

The invention relates to the technical field of cutting fluid filtering, in particular to a numerical control cutter grinding machine tool which comprises a machine tool body, a main shaft assembly, an index plate assembly and a grinding wheel set assembly. The circulating filtering and cooling assembly comprises a box body, a cooling device and a cooling device; a first-stage filtering assembly; the second-stage filtering assembly is in overflow connection with the first-stage filtering assembly, and the cutting fluid overflowing from the first-stage filtering assembly is subjected to continuous belt type filtering; the third-stage filtering assembly is connected with the second-stage filtering assembly through a pump, and the cutting fluid filtered by the second-stage filtering assembly is subjected to nanoscale filtering; the cutting fluid circulating pump supply system is used for pumping cutting fluid into the machine tool cooling pipeline and the position of a machined workpiece; the device has the advantages that the filtering effect is good, the cooling water and the filter paper can be recycled, the constant temperature of the cooling water can be ensured to stabilize the grinding precision, and the quality and efficiency of screw tap thread grinding machining can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of numerical control grinding machine tools, in particular to a numerical control tool grinding machine. BACKGROUND

[0002] In the process of tap thread grinding, the cooling water not only plays a role in cooling, avoiding damage to the parts caused by friction heat, but also can carry away the waste slag generated by grinding, preventing residual substances from affecting the machining precision and surface quality of the tap. However, the existing cooling water system for tap grinding has many shortcomings. On the one hand, some systems lack a cooling water filtration and circulation system, and the direct discharge of cooling water not only causes environmental pollution but also increases production costs; on the other hand, the filtering effect of the existing cooling water filtration device is poor, and the purity of the filtered cooling water is insufficient, which may still adversely affect the grinding accuracy of the tap when it is recycled.

[0003] Chinese patent CN113893589B discloses a cutting fluid filtration system, which comprises a recovery tank, a filtration tank and a standby tank. The filtration tank is provided with an upper tank opening and a side tank opening, and a plurality of upper partitions, lower partitions and filter plates are arranged in the filtration tank. The bottom of the upper partition is above the inner bottom surface of the filtration tank. The side tank opening is provided with a tank door which can be opened and closed. A liquid pump, a liquid suction pipe and a liquid delivery pipe are installed between the filtration tank and the recovery tank. The liquid suction pipe connects the liquid pump and the recovery tank, and the liquid delivery pipe connects the liquid pump and the inner side of the filtration tank. The standby tank is located on the side of the second side plate away from the first side plate, and is in communication with the filtration tank. The filter plate of the present application basically does not accumulate residual impurities, which greatly improves the sustainable use of the filter plate. The upper partition can effectively intercept pollutants with a density less than that of the cutting fluid, and the cover plate can be opened at any time to salvage and remove such pollutants. The problem of difficult cleaning of the sediment at the inner bottom of the filtration tank is effectively solved.

[0004] However, the technical solution uses the cutting fluid from the bottom to the top of the filter plate as the filtration equipment, which can intercept most impurities with a density greater than water and has a simple cleaning process, but cannot separate oil and grease and some suspended solids in water, which may result in poor filtration effect and insufficient purity of the cutting fluid. In addition, the temperature of the cooling water is difficult to maintain stable, and the temperature fluctuation is large after circulating into the system, which may affect the machining quality due to thermal expansion and contraction. SUMMARY

[0005] The present application aims to solve the problems of the prior art and provides a numerical control tool grinding machine. The three-layer filtration device realizes three-stage filtration of the cutting fluid, which not only solves the problem of poor filtration effect of the cutting fluid filtration device in the existing tap thread grinding machine, but also realizes the recycling of the cutting fluid, and ensures that the cutting fluid entering the machine maintains a constant temperature to prevent the grinding accuracy of the tap thread from being affected by the temperature difference between hot and cold.

[0006] To achieve the above object, the present application provides the following technical solutions: A numerical control tool grinding machine tool, comprising a machine tool, a spindle assembly, an index plate assembly, and a grinding wheel group assembly; Further comprising a circulating filtration cooling assembly located on the lower side of the machine tool, comprising: a box; a primary filtration assembly located on the uppermost layer of the box for achieving three separation of cutting fluid; a secondary filtration assembly provided on the lower left side of the box and connected with the primary filtration assembly for continuously belt filtering the cutting fluid overflowed from the primary filtration assembly; a tertiary filtration assembly provided on the lower right side of the box and connected with the secondary filtration assembly through a pump for nanoscale filtering of the cutting fluid filtered by the secondary filtration assembly; and a cutting fluid circulating pump supply system for pumping the cutting fluid to the filtration assembly and the machining workpiece.

[0007] As a preferred, the primary filtration assembly comprises a liquid distribution plate, a limiting part, and a waste chip collection assembly; The liquid distribution plate is inclined at a certain angle and defines the relative position by movably connecting with the limiting part; The liquid distribution plate achieves three separation of cutting fluid, including upper grease, primary filtered water, and waste residue and waste chip; The waste chip collection assembly is arranged on the lower layer of the liquid distribution plate for collecting the waste residue and waste chip filtered by the primary filtration assembly.

[0008] As a preferred, the secondary filtration assembly comprises: a water collecting tank, the upper part of which is a porous filter plate with a slope and connected with a vacuum pump; filter paper, which is laid on the upper part of the porous filter plate for filtering the primary filtered water to obtain secondary filtered water; synchronous rollers, which comprise a first synchronous roller and a second synchronous roller, the first synchronous roller is arranged at the input end of the filter paper, and the second synchronous roller is arranged at the output end of the filter paper; the synchronous rollers continuously drive the filter paper to roll; tensioning rollers, which are slidably arranged on the lower side of the vacuum water collecting tank for tensioning the filter paper; and a flushing assembly for flushing impurities on the filter paper.

[0009] As a preferred, the tertiary filtration assembly comprises a membrane filtration assembly, a cooling assembly, and a first water pump; The first water pump is located at the output port of the secondary filtration assembly for delivering the secondary filtered water to the membrane filtration assembly The membrane filtration assembly performs membrane filtration on the secondary filtration water to form tertiary filtration water. The cooling assembly is arranged below the membrane filtration assembly and is used for cooling the filtered water.

[0010] Preferably, the flushing assembly comprises: A scraper arranged below the second synchronous roller and used for scraping off impurities on the surface of the filter paper; A flushing roller arranged on both sides of the tensioning roller and externally connected to an input pipeline for providing water vapor; and a cleaning roller in transmission connection with the second synchronous roller and used for quickly scraping off residual impurities on the filter paper.

[0011] Preferably, the flushing roller comprises: An inner roller with a plurality of first spray holes evenly arranged on the wall of the inner roller; and a zigzag track arranged at both ends of the inner roller; An outer sleeve fixedly sleeved on the outer side of the inner roller and with a plurality of second spray holes evenly arranged on the wall of the outer sleeve for spraying water flow to flush the filter paper; and a needle brush arranged in the cutout A of the filter paper and reciprocatingly moved through the zigzag track of the inner roller, the needle brush being capable of ejecting impurities remaining in the filter paper.

[0012] Preferably, the waste collecting assembly is arranged in a pull-out type to facilitate cleaning and collecting of waste.

[0013] Preferably, the cleaning roller is in transmission connection with the first synchronous roller, the transmission gear of the cleaning roller having a smaller diameter than the first synchronous roller and having a movement direction opposite to that of the first synchronous roller.

[0014] Preferably, the second spray holes are arranged at the inflection points B of the filter paper and the flushing roller and at the outlet ends C of the filter paper and the flushing roller.

[0015] Preferably, the second spray holes have a smaller diameter at the outlet than at the inlet. (1) The three-layer filtration device is arranged to realize three-stage filtration of the cutting fluid of the tap thread grinding machine tool, the filtered cutting fluid can be reused in the tap grinding machine tool system, thereby realizing recycling of the cutting fluid and saving water resources.

[0016] (2) The present application sets a separation plate in the first filtering assembly, when the cutting fluid enters the assembly, the inclined structure of the separation plate guides the cutting fluid to flow into the assembly, the oil in the cutting fluid floats on the upper layer of the liquid due to the small density, and the waste residue in the cutting fluid deposits into the waste residue collecting assembly under the gravity, that is, the three separation of the cutting fluid is realized through the separation plate.

[0017] (3) The present application sets a flushing assembly, which includes a scraper, a flushing roller and a triple cleaning device of the cleaning roller, for cleaning the impurities trapped on the filter paper; the scraper scrapes the impurities on the surface of the filter paper; the flushing roller pushes out the impurities through the puncture of the needle brush and preliminarily dredges them, and then the water flow of the jet hole flushes out the impurities remaining in the filter paper; finally, the cleaning roller quickly scrapes the remaining impurities on the filter paper, so that the filter paper can enter the water collecting tank for filtering work again, realizing the reuse of the filter paper, saving the operation time of replacing the filter paper, and saving the use cost of the filter paper.

[0018] (4) The present application sets a cooling assembly in the third filtering assembly, which can ensure that the cooling water re-entering the tap thread grinding system maintains constant temperature, ensures that the machine tool maintains constant temperature, so as to avoid that the precision of the tap thread grinding machine is affected by the cold and hot temperature difference.

[0019] In summary, the present application has the advantages of good filtering effect, reusable cooling water and filter paper, constant temperature of cooling water to stabilize the grinding precision, etc., which can improve the quality and efficiency of tap thread grinding machining. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic diagram of the whole system of the present application; Figure 2 It is a schematic diagram of the internal structure of the machine tool of the present application; Figure 3 It is a schematic diagram of the whole system of the cutting fluid circulating filtering and cooling system of the present application; Figure 4 It is a schematic diagram of the internal structure of the cutting fluid circulating filtering and cooling system of the present application Figure 5 It is a front view of the internal structure of the cutting fluid circulating filtering and cooling system of the present application Figure 6 It is a schematic diagram of the second filtering assembly of the present application; Figure 7 It is a schematic diagram of the internal structure of the flushing roller of the present application; Figure 8 It is a schematic diagram of the whole structure of the flushing roller of the present application; Figure 9 It is a sectional view of the internal structure of the flushing roller of the present application. DETAILED DESCRIPTION

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] Example 1 like Figures 1-2 As shown, this embodiment provides a CNC tool grinding machine tool, including: a machine tool 1, a spindle assembly 2, an indexing plate assembly 3, and a grinding wheel assembly 4; The spindle assembly 2 is mounted on the machine tool 1 and includes a spindle drive module 21 and a spindle 22 mounted on the spindle drive module; The indexing plate assembly 3 is mounted on the machine tool 1 and is arranged opposite to the spindle assembly 2; The indexing plate assembly 3 includes a Y-axis slide 31, a direct drive motor assembly 32 mounted on the Y-axis slide, and an indexing plate 33 driven and connected to the direct drive motor assembly 32; it also includes a rotary shaft assembly 34 and a grinding machine base 35, wherein the rotary shaft assembly 34 is mounted on the indexing plate 33; The grinding wheel assembly 4 is mounted on one axial side of the spindle assembly 2. The grinding wheel magazine assembly 4 includes a rotating module 41. Several grinding wheel sets 42 are arranged circumferentially on the rotating module 41. The rotating module 41 rotates so that one of the grinding wheel sets 42 is coaxially facing the spindle. The spindle 22 and the rotating module 41 translate relative to each other to assemble the grinding wheel sets 42.

[0024] The grinding wheel magazine 4 further includes a translation module 43, on which the rotation module is mounted and driven by the translation module 43 to translate along the axial direction of the main shaft 22.

[0025] It also includes a circulating filtration and cooling assembly 5, which is located on the lower side of the machine tool 1 and is used for circulating and filtering the cutting fluid.

[0026] The spindle 22 is driven by the spindle drive module 21 to move along the X and Z axes, and is matched with the indexing plate assembly 3. After the tap workpiece is ground by the grinding wheel magazine 4, the cutting fluid enters the circulating filter cooling assembly 5 for filtration and cooling, and then returns to the workpiece processing area.

[0027] Example 2 like Figures 3-5 As shown, components that are the same as or corresponding to those in Embodiment 1 are referred to using the same reference numerals as in Embodiment 1. For simplicity, only the differences from Embodiment 1 are described below. The difference between Embodiment 2 and Embodiment 1 is as follows: The circulating filter cooling assembly 5 includes: Box 51; A primary filter assembly 52 is located on the top layer of the housing 51 and is used to achieve three-stage separation of the cutting fluid. The secondary filter assembly 53 is located on the lower left side of the housing 51 and is overflow connected to the primary filter assembly 52 to continuously filter the cutting fluid overflowing from the primary filter assembly 52. The third-stage filtration component 54 is located on the lower right side of the housing 51 and is connected to the second-stage filtration component via a pump to perform nano-level filtration of the cutting fluid filtered by the second-stage filtration component 53. And a cutting fluid circulation pump supply system 55, which pumps cutting fluid to the filter assembly and the workpiece.

[0028] The cutting fluid circulation pump supply system 55 includes a first circulating water pump 551, a second circulating water pump 552, and a circulating water pipe 553; The first circulating water pump 551 is located outside the housing 51 to realize the circulation of flushing water from the secondary filter component 53 back to the primary filter component 52. The second circulating water pump 552 is installed inside the housing 51 and is used to pump the filtered water after the third-stage filtration to the second-stage filtration component 53 as the flushing water for the component. The circulating water pipe 553 is located inside the machine tool 1 and is used to recirculate the clean filtered water after three-stage filtration back into the workpiece, thereby realizing the recycling of cutting fluid.

[0029] Example 3 like Figure 4 As shown, components that are the same as or corresponding to those in Embodiment 1 are referred to using the same reference numerals as in Embodiment 1. For simplicity, only the differences from Embodiment 1 are described below. The difference between Embodiment 3 and Embodiment 1 is as follows: The primary filtration assembly 52 includes a liquid distribution plate 521, a limiting part 522, and a waste collection assembly 523; The liquid distribution plate 521 is tilted at a certain angle and its relative position is limited by the movable connecting limiting part 522; The liquid separation plate 521 realizes the three separations of cutting fluid, including upper grease, primary filtered water, and waste residue and chips; The waste collection component 523 is located on the lower layer of the liquid separator 521 and is used to collect the waste residue and debris from the primary filtration.

[0030] The waste collection component 523 is designed as a pull-out type, which facilitates the cleaning of collected waste residue and debris.

[0031] After the cutting fluid enters the primary filter assembly 52, the inclined structure of the distributor plate 521 guides the cutting fluid to flow smoothly into the assembly. Due to its low density, the grease in the cutting fluid floats on the surface, while the waste residue and debris in the cutting fluid settles into the waste collection assembly 523 below due to gravity. As the cutting fluid continues to flow in, once it reaches a certain height, the cutting fluid that has passed through the primary filter can naturally flow into the secondary filter assembly 53 through the channel below the distributor plate 521.

[0032] Example 4 like Figures 4-6 As shown, components that are the same as or corresponding to those in Embodiment 1 are referred to using the same reference numerals as those in Embodiment 1. For simplicity, only the differences from Embodiment 1 are described below. The difference between Embodiment 4 and Embodiment 1 is as follows: The secondary filter component 53 includes: The water collection tank 531 has a perforated filter plate 532 with a slope on the upper part and is connected to a vacuum pump 533. The vacuum pump 533 evacuates the water collection tank 531, and the pressure change guides the primary filtered water to the water collection tank 531 for filtration and collection. Preferably, the slope is between 1% and 2%; Filter paper 534 is laid on the upper part of the perforated filter plate 532 and is used to filter primary filtered water to obtain secondary filtered water. Preferably, the filter paper 534 is generally made of cellulose filter paper, synthetic fiber filter paper, composite filter paper, etc. Synchronous roller 535, which includes a first synchronous roller 5351 and a second synchronous roller 5352, wherein the first synchronous roller 5351 is disposed at the input end of the filter paper 534 and the second synchronous roller 5352 is disposed at the output end of the filter paper 534, and the filter paper 534 is continuously driven to roll by the belt. Tensioning roller 536 is slidably disposed on the lower side of the vacuum water collection tank, in the middle position between the first synchronous roller 5351 and the second synchronous roller 5352. The sliding function is set to ensure that the filter paper 534 is always in a tensioned state. And a flushing assembly 537, which is used to flush impurities on the filter paper 534.

[0033] The primary filtered water enters the secondary filtration assembly 53 through the channel. In the secondary filtration assembly 53, the water collection tank 531 creates a vacuum environment with the help of the vacuum pump 533. By using the pressure change, the primary filtered water is guided to collect in the water collection tank 531. At the same time, the primary filtered water passes through the filter paper 534 on the perforated filter plate 532 and is filtered to obtain the secondary filtered water.

[0034] Example 5 like Figure 6 As shown, components that are the same as or corresponding to those in Embodiment 1 are referred to using the same reference numerals as those in Embodiment 1. For simplicity, only the differences from Embodiment 1 are described below. The difference between Embodiment 5 and Embodiment 1 is as follows: The flushing assembly 537 includes: Scraper 5371, located below the second synchronous roller 5352, is used to scrape off impurities from the surface of the filter paper. A flushing roller 5372 is disposed on both sides of the tensioning roller 536 and externally connected to an input pipe for providing water vapor. And cleaning roller 5373, which is connected to the first synchronous roller 5351 for quickly scraping off residual impurities on filter paper 534; filter paper 534 enters the water collection tank again to filter the first stage of filtered water. The cleaning roller 373 is connected to the first synchronous roller 5351 via a transmission connection. The diameter of the transmission gear of the cleaning roller 373 is smaller than that of the first synchronous roller 5351, and its movement direction is opposite to that of the perforated filter plate 532, so as to facilitate the scraping of impurities.

[0035] Example 6 like Figure 7 , Figure 9 As shown, components that are the same as or corresponding to those in Embodiment 1 are referred to using the same reference numerals as those in Embodiment 1. For simplicity, only the differences from Embodiment 1 are described below. The difference between Embodiment 6 and Embodiment 1 is as follows: The flushing roller 5372 includes: The inner roller 53721 has several rows of first injection holes 53722 evenly opened on its wall; the inner roller 53721 is also provided with curved tracks at both ends. The outer sleeve 53723 is fixedly sleeved on the outside of the inner roller 53721, and several rows of evenly distributed second spray holes 53724 are opened on the wall for spraying water vapor onto the filter paper 534 to rinse the filter paper 534. Preferably, the number of rows of the first injection holes 53722 is greater than the number of rows of the second injection holes 53724; The second injection hole 53724 is respectively disposed at the inflection point B of the filter paper and the flushing roller 5372 and the outlet end C of the filter paper 534 and the flushing roller; The outlet diameter of the second injection hole 53724 is smaller than the inlet diameter. This setting increases the velocity of the ejected water vapor, thereby increasing the pressure and force during ejection, making the ejected water vapor more concentrated and the impact force stronger.

[0036] And a needle brush 53725, which is disposed at the inlet A of the inner roller 53721 and the filter paper 534, and reciprocates through the tortuous track of the inner roller 53721. The function of the needle brush 53725 is to push out the impurities remaining inside the filter paper 534.

[0037] Impurities trapped on the filter paper 534 are carried out by the action of the second synchronous roller 5352. The scraper 5371 located on the lower side of the second synchronous roller 5352 first scrapes off the impurities on the surface of the filter paper 534. Then, the filter paper 534 passes through the flushing roller 5372, where the impurities are pushed out and initially cleared by the piercing action of the needle brush 53725. Then, the impurities remaining inside the filter paper 534 are discharged by the water flow through the spray hole. Finally, the cleaning roller 5373 quickly scrapes off the trace impurities remaining on the surface of the filter paper 534, allowing the filter paper 534 to re-enter the water collection tank for filtration.

[0038] The impurities removed from the filter paper 534 and the rinsing water are collected in the storage box below the secondary filter component 53; the liquid in the storage box is re-injected into the first filter component by the first circulating water pump 551; the settled impurities can be removed from the storage box for manual cleaning.

[0039] Example 7 like Figure 5 As shown, components that are the same as or corresponding to those in Embodiment 1 are referred to using the same reference numerals as in Embodiment 1. For simplicity, only the differences from Embodiment 1 are described below. The difference between Embodiment 7 and Embodiment 1 is as follows: The three-stage filtration assembly 54 includes a membrane filtration assembly 541, a cooling assembly 542, and a first water pump 543; The first water pump 543 is located at the output port of the secondary filtration component 53, and delivers the secondary filtered water to the membrane filtration component 541. The membrane filtration assembly 541 performs membrane filtration on the secondary filtered water to form tertiary filtered water; At this point, the three-stage filtered water meets the standards for cooling water and can be recirculated back to the workpiece. The cooling component 542 is located below the membrane filter component 541 and is used to cool the filtered water to ensure that the cooling water re-entering the system maintains a constant temperature, so as to avoid the machine tool 1 being affected by the temperature difference between hot and cold due to the temperature change of the cooling water.

[0040] The cooling component 542 is either an air-cooled component or a water-cooled component, and is selected according to different cutting fluid temperature requirements. The specific air-cooled component or water-cooled component is prior art, and the detailed structure will not be described in this application.

[0041] Secondary filtered water is transported to membrane filter module 541 by the first circulating water pump 551. After membrane filtration, it becomes tertiary filtered water, which is then returned to the workpiece. At the same time, the cooling component 542 located below the membrane filter module 541 cools the filtered water.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A numerical control tool grinder machine tool, comprising a machine tool, a spindle assembly, an index plate assembly, a grinding wheel group assembly; characterized in that Further comprising a circulating filtration cooling assembly, the circulating filtration cooling assembly is located at the lower side of the machine tool, comprising: a box; a primary filtration assembly, the primary filtration assembly is located at the uppermost layer of the box, for realizing three separation of cutting fluid; a secondary filtration assembly, the secondary filtration assembly is arranged at the lower left side of the box, and is overflow connected with the primary filtration assembly, and continuously belt filters the cutting fluid overflowed from the primary filtration assembly; a tertiary filtration assembly, the tertiary filtration assembly is arranged at the lower right side of the box, and is connected with the secondary filtration assembly through a pump, and carries out nanometer filtration on the cutting fluid filtered by the secondary filtration assembly; and a cutting fluid circulating pump supply system, the cutting fluid circulating pump supply system pumps the cutting fluid to the filtration assembly and the machining workpiece.

2. A numerically controlled tool grinder as claimed in claim 1, characterized in that The primary filtration assembly comprises a liquid distribution plate, a limiting part and a waste chip collection assembly; The liquid distribution plate is inclined at a certain angle and defines the relative position by the movable connection limiting part; The liquid distribution plate realizes three separation of cutting fluid, including upper grease, primary filtered water and waste residue; The waste chip collection assembly is arranged at the lower layer of the liquid distribution plate and is used for collecting the waste residue of the primary filtration.

3. A numerically controlled tool grinder as claimed in claim 1, characterized in that The secondary filtration assembly comprises: a water collecting tank, the upper part of the water collecting tank is a filter plate with holes and a slope, and a vacuum pump is connected outside; filter paper, the filter paper is laid on the upper part of the filter plate with holes, for filtering the primary filtered water to obtain secondary filtered water; synchronous rollers, the synchronous rollers comprise a first synchronous roller and a second synchronous roller, the first synchronous roller is arranged at the input end of the filter paper, and the second synchronous roller is arranged at the output end of the filter paper; the synchronous rollers continuously belt drive the filter paper to roll; tensioning rollers, the tensioning rollers are slidingly arranged at the lower side of the vacuum water collecting tank, for tensioning the filter paper; and a flushing assembly, the flushing assembly is used for flushing impurities on the filter paper.

4. A numerically controlled tool grinder as claimed in claim 1, characterized in that, The tertiary filtration assembly comprises a membrane filtration assembly, a cooling assembly and a first water pump; The first water pump is located at the output port of the secondary filtration assembly, and delivers the secondary filtered water to the membrane filtration assembly The membrane filtration assembly carries out membrane filtration on the secondary filtered water to form tertiary filtered water; The cooling assembly is arranged below the membrane filtration assembly and is used for cooling the filtered water.

5. A numerically controlled tool grinder as claimed in claim 3, wherein, The flushing assembly comprises: a scraper, the scraper is located below the second synchronous roller and is used for scraping off impurities on the surface of the filter paper; flushing rollers, the flushing rollers are arranged on both sides of the tensioning rollers and are connected with an input pipeline for providing water vapor outside; and a cleaning roller, the cleaning roller is in transmission connection with the second synchronous roller and is used for quickly scraping off residual impurities on the filter paper.

6. A numerically controlled tool grinder as claimed in claim 5, characterised in that, The flushing roller comprises: an inner roller, a plurality of first injection holes are uniformly arranged on the wall of the inner roller; the two ends of the inner roller are further provided with a zigzag track; an outer sleeve, the outer sleeve is fixedly sleeved on the outer side of the inner roller, and a plurality of second injection holes are uniformly arranged on the wall of the outer sleeve to flush the filter paper with water flow; and a needle brush, the needle brush is arranged in a notch A between the inner roller and the filter paper and reciprocates through the zigzag track arranged on the inner roller, and the needle brush can eject the impurities remaining in the filter paper.

7. A numerically controlled tool grinder as claimed in claim 2, wherein, The waste collecting assembly is arranged in a drawer type, facilitating the cleaning of the collected waste.

8. A numerically controlled tool grinder as claimed in claim 5, characterized in that, The cleaning roller is driven by the first synchronous roller, and the driving gear of the cleaning roller has a smaller diameter than the first synchronous roller and has an opposite movement direction.

9. A numerically controlled tool grinder as claimed in claim 6, characterized in that The second spray holes are respectively arranged at the inflection point B of the filter paper and the flushing roller and the outlet end C of the filter paper and the flushing roller.

10. A numerically controlled tool grinder as claimed in claim 6, characterized in that, The outlet diameter of the second spray hole is smaller than the inlet diameter.

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