Grinding machine with circulating cooling system

Abstract

The invention relates to the technical field of grinding machines, and discloses a grinding machine with a circulating cooling system.The grinding machine comprises a numerical control grinding machine body, a cooling liquid collecting tank is arranged below the numerical control grinding machine body, a filtering assembly is arranged on one side of the numerical control grinding machine body, and the filtering assembly comprises an oil mist collector and a filtering box; the oil mist collector comprises an oil-liquid separator, the numerical control grinding machine body is connected with an inlet of the oil-liquid separator through an oil mist through pipe, an outlet of the oil-liquid separator is communicated with an oil-liquid tank and a circulating water tank, the circulating water tank is connected with a filter tank through a communicating pipe, the filter tank is connected with a cooling liquid tank, and the cooling liquid tank is connected with a cooling liquid outlet of the numerical control grinding machine body. The numerical control grinding machine has the advantages that the phenomenon that oil mist flies over the surface can be greatly reduced, it is guaranteed that cooling liquid can be cleaned and recycled, and filtering chippings can be automatically cleared away.

Description

Technical Field

[0001] The invention relates to the technical field of grinders, in particular to a grinder with a circulating cooling system. Background Art

[0002] CNC grinding machines are precision machining equipment that have the advantages of increasing productivity, improving quality and reducing costs. They are able to produce parts with high precision and accuracy, and because they can run continuously without rest, they can produce parts in large quantities and improve productivity. In addition, CNC grinding machines reduce labor costs by eliminating the need for skilled operators, allowing unskilled workers to operate them. However, existing CNC grinding machines have difficulty separating the ground metal powder and coolant during operation, making it difficult to reuse the coolant.

[0003] The utility model patent with publication number CN219189846U discloses a CNC grinding machine, including a CNC grinding machine body, a circulation component, a filter component, a coolant collection box, a first connecting pipe, etc. The above-mentioned grinding machine can separate the metal powder remaining in the coolant again through the adsorption filter plate, and discharge it again for use through the third connecting pipe, the circulation pump, the second connecting pipe, the coolant tank, and the liquid outlet pipe. In the later stage, the adsorption filter plate is moved out by the lateral movement of the mounting ring to facilitate the cleaning of the adsorption filter plate, which realizes the automatic circulation of the coolant and facilitates the disassembly and cleaning of the adsorption filter plate, thereby improving the practical effect of the device.

[0004] However, the above-mentioned CNC grinding machine still has the following shortcomings when it is actually used, such as: 1. Although the CNC grinding machine can separate the metal powder and the coolant from each other, and collect the coolant uniformly for further recycling, it is unable to collect components such as oil in the coolant (the components that are vaporized and liquefied during cutting will adhere to the inside of the main body and the surface of the device), and "aerosol" will blow on the face when the door is opened and closed; 2. The adsorption filter plate is easy to clog, and metal debris is easy to accumulate on the filter plate, which affects the circulation effect of the coolant and leads to low filtration efficiency; 3. The adsorption filter plate needs to be cleaned frequently and regularly by humans, which is not only troublesome to operate, but also requires high labor intensity and is inconvenient to use. The machine needs to be shut down for cleaning, which affects the working efficiency of the equipment. Summary of the invention

[0005] The purpose of the present invention is to provide a grinding machine with a circulating cooling system. By separating the oil in the coolant, the phenomenon of oil mist blowing on the face can be greatly reduced. The coolant is doubly filtered by the filtering mechanism in the coolant collection tank and the filter box to ensure that the coolant can be cleanly recycled, avoiding the potential risk of failure of the equipment caused by metal debris, and effectively improving the operating efficiency and cooling performance of the grinder. The filtered debris in the filtering mechanism is automatically cleaned by the self-cleaning mechanism, so that the filtering effect is good, the production efficiency is high, and the labor intensity is low.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] A grinding machine with a circulating cooling system comprises a CNC grinding machine body, a coolant collecting tank is arranged below the CNC grinding machine body, a filter assembly is arranged on one side of the CNC grinding machine body, the filter assembly comprises an oil mist collector and a filter box, the oil mist collector comprises an oil separator, the CNC grinding machine body is connected to the inlet of the oil separator through an oil mist pipe, the outlet of the oil separator is communicated with the oil tank and a circulating water tank respectively, the circulating water tank is connected to the filter box through a connecting pipe, the filter box is connected to the coolant tank, the coolant tank is communicated with the coolant pipe of the CNC grinding machine body, and filtering mechanisms are arranged in the coolant collecting tank and the filter box.

[0008] By adopting the above technical scheme, after the coolant is initially filtered through the coolant collecting tank under the main body of the CNC grinding machine, it enters the oil mist collector through the oil mist pipe. The oil separator in the oil mist collector separates the oil mist in the coolant, and the separated oil is discharged through the outlet of the oil separator and stored in a special oil tank, while the separated coolant returns to the circulating water tank and is sucked into the filter box through the connecting pipe for deep filtration. The filtered coolant is finally collected in the coolant tank and re-discharged through the coolant pipe of the main body of the CNC grinding machine for recycling. The oil mist collector separates the oil in the coolant through the oil separator, which can greatly reduce the phenomenon of oil mist blowing on the face. The coolant is double-filtered by the filtering mechanism in the coolant collecting tank and the filter box, ensuring the clean recycling of the coolant, avoiding the potential risk of failure of the equipment caused by metal debris, and thereby improving the operating efficiency and cooling performance of the grinder.

[0009] The present invention is further configured as follows: the filtering mechanism includes an arc-shaped filter plate with a concave surface facing upward, which is arranged in a coolant collection tank or a filter box; a slag discharge channel is provided at the bottom of the arc-shaped filter plate; a conveying auger is provided in the slag discharge channel; the slag discharge channel is connected to the debris collection tank through a slag discharge port; and a self-cleaning mechanism is provided above the arc-shaped filter plate.

[0010] By adopting the above technical scheme, when the arc filter plate with the concave surface facing upward filters the coolant, the debris can be more easily concentrated to its bottom, making it easier for the debris to enter the slag discharge channel. The self-cleaning mechanism can automatically further clean the debris on the arc filter plate and push the debris on the arc filter plate into the slag discharge channel. The conveying auger in the slag discharge channel transports the debris entering the slag discharge channel to the debris collection tank, ensuring that the arc filter plate always maintains a good filtering effect. During the entire process, no manual cleaning or shutdown is required, which not only greatly reduces the impact of production interruptions caused by replacing the arc filter plate on production efficiency, but also effectively reduces manual labor intensity.

[0011] The present invention is further configured as follows: the self-cleaning mechanism includes a plurality of groups of self-cleaning brushes symmetrically arranged on both sides above the arc filter plate, and each of the self-cleaning brushes is connected to a driving mechanism for driving each cleaning brush to repeatedly clean the metal debris on the arc filter plate to the slag discharge channel.

[0012] By adopting the above technical solution, the self-cleaning brushes symmetrically arranged on both sides of the arc filter plate are driven by a driving mechanism to continuously reciprocate, so that metal debris on the arc filter plate can be cleaned to the slag discharge channel, ensuring that the surface of the arc filter plate remains clean, effectively improving the filtration efficiency and extending the service life of the arc filter plate.

[0013] The present invention is further configured as follows: the driving mechanism includes a driving screw and a driving shaft located above the arc filter plate and opposite to the center of the arc filter plate, the driving shaft is located below the driving screw and parallel to the driving screw, both ends of the driving screw are respectively rotatably connected to the coolant collection tank or the filter box, one end of the driving screw is connected to a driving motor fixed on the coolant collection tank or the filter box, and both ends of the driving shaft are respectively slidably matched with the longitudinal slide grooves on the two side walls of the coolant collection tank or the filter box.

[0014] The present invention is further configured as follows: each group of self-cleaning brushes is hinged to the driving block on the driving screw through connecting rod 1 and connecting rod 2, the driving block is threadedly connected to the driving screw, the connecting rod 1 and connecting rod 2 are connected to the driving shaft through driving rod 1 and driving rod 2, one end of the driving rod 1 and driving rod 2 are hinged to connecting rod 1 and connecting rod 2, the other end of the driving rod 1 and driving rod 2 are rotatably connected to the driving shaft and can slide axially along the driving shaft, and the driving shaft is connected to the driving screw through a lifting adjustment rod.

[0015] The present invention is further configured as follows: a longitudinal slide is provided at the upper end of the lifting adjustment rod, a guide groove is provided on the side wall of the longitudinal slide, the guide groove is slidably matched with a guide block fixed on the driving screw, a rack parallel to the longitudinal slide is provided on one side of the longitudinal slide, and the rack is meshed with a gear fixed on the driving screw.

[0016] By adopting the above technical solution, the driving screw is used to drive the self-cleaning brush to reciprocate in a direction parallel to the slag discharge channel, and the driving shaft is used to drive the self-cleaning brush to reciprocate in a direction perpendicular to the slag discharge channel, which not only realizes the multi-angle cleaning of the cleaning brush, but also improves the cleaning efficiency and range, so that the self-cleaning brush can fully and effectively clean the metal debris on the surface of the curved filter plate, ensuring that the surface of the curved filter plate remains clean;

[0017] When the output shaft of the driving motor is controlled to rotate alternately forward and reverse at a certain frequency, the driving screw connected thereto is driven to rotate alternately forward and reverse. The alternate forward and reverse rotation of the driving screw can cause the driving block threadedly connected thereto to slide back and forth along its axial direction, thereby driving the connecting rod 1, the connecting rod 2 and the self-cleaning brush connected thereto to reciprocate in a direction parallel to the axis of the driving screw.

[0018] When the driving screw rotates alternately forward and backward, it also drives the gear fixedly connected to it to rotate alternately forward and backward synchronously. When the gear rotates alternately forward and backward, it drives the rack meshing with it to move back and forth, thereby driving the lifting and adjusting rod fixedly connected to the rack to move back and forth. When the lifting and adjusting rod moves back and forth up and down, it will drive the driving shaft connected to it to move back and forth up and down, thereby driving the one end of driving rod 1 and driving rod 2 connected to them to move up and down, so that the other ends of driving rod 1 and driving rod 2 respectively drive connecting rod 1 and connecting rod 2 to reciprocate in a direction perpendicular to the slag discharge channel, thereby making the self-cleaning brush reciprocate in a direction perpendicular to the slag discharge channel, realizing multi-angle cleaning of the cleaning brush, improving cleaning efficiency and range, effectively reducing equipment failures caused by accumulation of metal debris, and extending the service life of the equipment.

[0019] The present invention is further configured as follows: a circulating pump is provided in the circulating water tank, and the circulating pump is connected to the filter box through a connecting pipe.

[0020] By adopting the above technical solution, the start and stop of the circulation pump can ensure the circulation flow between the coolant circulation water tank and the filter box, and at the same time ensure that the coolant always maintains an appropriate flow rate during the circulation process, thereby effectively ensuring the filtering effect of the coolant.

[0021] The present invention is further configured as follows: a lighting device and a chassis are installed outside the main body of the CNC grinding machine.

[0022] By adopting the above technical solution, the setting of the lighting device improves the brightness of the processing area, making it easier for the operator to observe the details of the processing area, while the chassis effectively protects the internal electronic components and ensures the stable operation of the CNC grinder in complex environments.

[0023] The present invention is further configured as follows: the top and the door of the CNC grinding machine body are both provided with transparent windows.

[0024] By adopting the above technical solution, the setting of the transparent window facilitates lighting and observation, and is convenient for the operator to monitor the internal working status in real time, thereby improving the safety of equipment use and the convenience of maintenance.

[0025] The beneficial effects of the present invention are:

[0026] 1. After the coolant is initially filtered through the coolant collection tank under the main body of the CNC grinding machine, it enters the oil mist collector through the oil mist pipe. The oil separator in the oil mist collector separates the oil mist in the coolant, and the separated oil will be discharged through the outlet of the oil separator and stored in a special oil tank, while the separated coolant returns to the circulating water tank and is sucked into the filter box through the connecting pipe for deep filtration. The filtered coolant is finally collected in the coolant tank and re-discharged through the coolant pipe of the main body of the CNC grinding machine for recycling. The oil mist collector separates the oil in the coolant through the oil separator, which can greatly reduce the phenomenon of oil mist blowing on the face. The coolant is double-filtered by the filtering mechanism in the coolant collection tank and the filter box, ensuring the clean recycling of the coolant, avoiding the potential risk of failure of the equipment caused by metal debris, and thus improving the operating efficiency and cooling performance of the grinder.

[0027] 2. When the arc-shaped filter plate with the concave surface facing upward in the filtering mechanism filters the coolant, the debris can be more easily concentrated at its bottom, making it easier for the debris to enter the slag discharge channel. The self-cleaning mechanism can automatically further clean the debris on the arc-shaped filter plate and push the debris on the arc-shaped filter plate into the slag discharge channel. The conveying auger in the slag discharge channel transports the debris entering the slag discharge channel to the debris collection tank, ensuring that the arc-shaped filter plate always maintains a good filtering effect. During the whole process, no manual cleaning or shutdown is required, which not only greatly reduces the impact of production interruptions caused by replacing the arc-shaped filter plate on production efficiency, but also effectively reduces the labor intensity.

[0028] 3. A driving mechanism is used to drive the self-cleaning brushes symmetrically arranged on both sides of the arc filter plate to continuously reciprocate, wherein the driving screw is used to drive the self-cleaning brush to reciprocate in a direction parallel to the slag discharge channel, and the driving shaft is used to drive the self-cleaning brush to reciprocate in a direction perpendicular to the slag discharge channel. This not only realizes multi-angle cleaning of the cleaning brush, but also improves the cleaning efficiency and range, so that the self-cleaning brush can fully and effectively clean the metal debris on the surface of the arc filter plate, ensuring that the surface of the arc filter plate remains clean and sweeping the metal debris on the arc filter plate to the slag discharge channel, ensuring that the surface of the arc filter plate remains clean, effectively improving the filtration efficiency and extending the service life of the arc filter plate.

[0029] 4. The setting of the lighting device in the present invention improves the brightness of the processing area, making it easier for the operator to observe the details of the processing area, while the chassis effectively protects the internal electronic components, ensuring the stable operation of the CNC grinder in a complex environment. The setting of the transparent window facilitates lighting and observation, making it easier for the operator to monitor the internal working status in real time, thereby improving the safety of equipment use and the convenience of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 The utility model is a schematic diagram of the overall structure of a grinding machine with a circulating cooling system according to the present invention.

[0032] Figure 2 The present invention is a schematic cross-sectional structure diagram of a coolant collecting tank or a filter box in a grinding machine with a circulating cooling system.

[0033] Figure 3 The present invention is a schematic diagram of the external structure of a coolant collecting tank or a filter box in a grinding machine with a circulating cooling system.

[0034] In the figure, 1. CNC grinding machine body; 2. coolant collecting tank; 3. filter assembly; 31. oil mist collector; 32. filter box; 4. oil mist pipe; 5. circulating water tank; 6. coolant tank; 7. filter mechanism; 71. arc filter plate; 72. slag discharge channel; 73. conveying auger; 74. slag discharge port; 75. debris collection tank; 8. self-cleaning brush; 9. driving mechanism; 91. driving screw; 92. driving shaft; 93. driving motor; 94. longitudinal slide; 95. connecting rod one; 96. connecting rod two; 97. driving rod one; 98. driving rod two; 99. driving block; 90. lifting adjustment rod; 901. longitudinal slide; 902. guide groove; 903. guide block; 904. rack; 905. gear; 10. lighting device; 11. chassis; 12. transparent window. DETAILED DESCRIPTION

[0035] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Examples, such as Figures 1 to 3 As shown, a grinding machine with a circulating cooling system includes a CNC grinding machine body 1, a coolant collecting tank 2 is provided below the CNC grinding machine body 1, a filter assembly 3 is provided on one side of the CNC grinding machine body 1, the filter assembly 3 includes an oil mist collector 31 and a filter box 32, the oil mist collector 31 includes an oil separator, the CNC grinding machine body 1 is connected to the inlet of the oil separator through an oil mist pipe 4, the outlet of the oil separator is communicated with the oil tank and the circulating water tank 5 respectively, the circulating water tank 5 is connected to the filter box 32 through a connecting pipe, the filter box 32 is connected to the coolant tank 6, the coolant tank 6 is communicated with the coolant pipe of the CNC grinding machine body 1, and a filter mechanism 7 is provided in the coolant collecting tank 2 and the filter box 32.

[0037] Furthermore, the filtering mechanism 7 includes an arc-shaped filter plate 71 with a concave surface facing upward, which is arranged in the coolant collection tank 2 or the filter box 32. A slag discharge channel 72 is provided at the bottom of the arc-shaped filter plate 71. A conveying auger 73 is provided in the slag discharge channel 72. The slag discharge channel 72 is connected to the debris collection tank 75 through a slag discharge port 74. A self-cleaning mechanism is provided above the arc-shaped filter plate 71.

[0038] Furthermore, the self-cleaning mechanism includes multiple groups of self-cleaning brushes 8 symmetrically arranged on both sides above the arc filter plate 71, and each of the self-cleaning brushes 8 is connected to a driving mechanism 9 for driving each cleaning brush 8 to repeatedly clean the metal debris on the arc filter plate 71 to the slag discharge channel 72.

[0039] Furthermore, the driving mechanism 9 includes a driving screw 91 and a driving shaft 92 located above the arc filter plate 71 and opposite to the center of the arc filter plate 71, the driving shaft 92 is located below the driving screw 91 and parallel to the driving screw 91, the two ends of the driving screw 91 are respectively rotatably connected to the coolant collection tank 2 or the filter box 32, one end of the driving screw 91 is connected to a driving motor 93 fixed on the coolant collection tank 2 or the filter box 32, and the two ends of the driving shaft 92 are respectively slidably matched with the longitudinal slide grooves 94 on the two side walls of the coolant collection tank 2 or the filter box 32.

[0040] Furthermore, each group of self-cleaning brushes 8 is hinged to the driving block 99 on the driving screw 91 through a connecting rod 1 95 and a connecting rod 2 96 respectively, and the driving block 99 is threadedly connected to the driving screw 91. The connecting rod 1 95 and the connecting rod 2 96 are connected to the driving shaft 92 through a driving rod 1 97 and a driving rod 2 98 respectively, and one end of the driving rod 1 97 and the driving rod 2 98 are hinged to the connecting rod 1 95 and the connecting rod 2 96 respectively, and the other end of the driving rod 1 97 and the driving rod 2 98 are rotatably connected to the driving shaft 92 and can slide axially along the driving shaft 92, and the driving shaft 92 is connected to the driving screw 91 through a lifting adjustment rod 90.

[0041] Furthermore, a longitudinal slide 901 is provided at the upper end of the lifting adjustment rod 90, and a guide groove 902 is provided on the side wall of the longitudinal slide 901. The guide groove 902 is slidably matched with a guide block 903 fixed on the driving screw 91. A rack 904 parallel to the longitudinal slide 901 is provided on one side of the longitudinal slide 901, and the rack 904 is meshed with a gear 905 fixed on the driving screw 91.

[0042] Furthermore, a circulation pump is provided in the circulation water tank 5 , and the circulation pump is connected to the filter box 32 through a connecting pipe.

[0043] Furthermore, a lighting device 10 and a chassis 11 are installed outside the CNC grinding machine body 1 .

[0044] Furthermore, the top and the door of the CNC grinding machine body 1 are both provided with transparent windows 12 .

[0045] Its working principle is: after the coolant is initially filtered through the coolant collecting tank 2 under the CNC grinding machine body 1, it enters the oil mist collector 31 through the oil mist pipe 4, and the oil separator in the oil mist collector 31 separates the oil mist in the coolant, and the separated oil will be discharged through the outlet of the oil separator and stored in a special oil tank, while the separated coolant returns to the circulating water tank 5 and is sucked into the filter box 32 through the connecting pipe for deep filtration. The filtered coolant is finally collected in the coolant tank 6 and is re-discharged through the coolant pipe of the CNC grinding machine body 1 for recycling. The oil mist collector 31 separates the oil in the coolant through the oil separator, which can greatly reduce the phenomenon of oil mist blowing on the face. The coolant is double-filtered by the filter mechanism 7 in the coolant collecting tank 2 and the filter box 32, ensuring the clean recycling of the coolant, avoiding the potential risk of failure of the equipment caused by metal debris, and thereby improving the operating efficiency and cooling performance of the grinder.

[0046] Among them, the filter mechanism 7 filters the coolant through the curved filter plate 71 with the concave surface facing upward. The curved filter plate 71 with the concave surface facing upward can make the debris more easily concentrated at its bottom, making it easier for the debris to enter the slag discharge channel 72. The self-cleaning mechanism uses the driving mechanism 9 to drive the self-cleaning brushes 8 symmetrically arranged on both sides of the curved filter plate 71 to continuously reciprocate in directions parallel and perpendicular to the slag discharge channel 72, thereby automatically further cleaning the debris on the curved filter plate 71 and pushing the debris on the curved filter plate 71 into the slag discharge channel 72. The conveying auger 73 in the slag discharge channel 72 conveys the debris entering the slag discharge channel 72 to the debris collecting trough 75, ensuring that the curved filter plate 71 always maintains a good filtering effect. During the entire process, no manual cleaning or shutdown operation is required, which not only greatly reduces the impact of production interruptions caused by replacing the curved filter plate 71 on production efficiency, but also effectively reduces manual labor intensity.

Claims

1. A grinding machine with a circulating cooling system, characterized in that: The invention comprises a CNC grinding machine body (1), a coolant collecting tank (2) is arranged below the CNC grinding machine body (1), a filter assembly (3) is arranged on one side of the CNC grinding machine body (1), the filter assembly (3) comprises an oil mist collector (31) and a filter box (32), the oil mist collector (31) comprises an oil separator, the CNC grinding machine body (1) is connected to the inlet of the oil separator through an oil mist pipe (4), the outlet of the oil separator is connected to the oil tank and a circulating water tank (5) respectively, the circulating water tank (5) is connected to the filter box (32) through a connecting pipe, the filter box (32) is connected to the coolant tank (6), the coolant tank (6) is connected to the coolant pipe of the CNC grinding machine body (1), and the coolant collecting tank (2) and the filter box (32) are both provided with a filter mechanism (7).

2. A grinding machine with a circulating cooling system according to claim 1, characterized in that: The filtering mechanism (7) comprises an arc-shaped filter plate (71) with a concave surface facing upwards, which is arranged in a coolant collection tank (2) or a filter box (32); a slag discharge channel (72) is provided at the bottom of the arc-shaped filter plate (71); a conveying auger (73) is provided in the slag discharge channel (72); the slag discharge channel (72) is connected to a debris collection tank (75) through a slag discharge port (74); and a self-cleaning mechanism is provided above the arc-shaped filter plate (71).

3. A grinding machine with a circulating cooling system according to claim 2, characterized in that: The self-cleaning mechanism comprises a plurality of groups of self-cleaning brushes (8) symmetrically arranged on both sides above the arc-shaped filter plate (71), and each of the self-cleaning brushes (8) is connected to a driving mechanism (9) for driving each cleaning brush (8) to repeatedly clean metal debris on the arc-shaped filter plate (71) to a slag discharge channel (72).

4. A grinding machine with a circulating cooling system according to claim 3, characterized in that: The driving mechanism (9) comprises a driving screw (91) and a driving shaft (92) located above the arc filter plate (71) and opposite to the center of the arc filter plate (71); the driving shaft (92) is located below the driving screw (91) and parallel to the driving screw (91); both ends of the driving screw (91) are respectively rotatably connected to the coolant collecting tank (2) or the filter box (32); one end of the driving screw (91) is connected to a driving motor (93) fixed on the coolant collecting tank (2) or the filter box (32); and both ends of the driving shaft (92) are respectively slidably matched with longitudinal slide grooves (94) on the two side walls of the coolant collecting tank (2) or the filter box (32).

5. A grinding machine with a circulating cooling system according to claim 4, characterized in that: Each group of self-cleaning brushes (8) is respectively hinged to a driving block (99) on a driving screw (91) through a connecting rod 1 (95) and a connecting rod 2 (96); the driving block (99) is threadedly connected to the driving screw (91); the connecting rod 1 (95) and the connecting rod 2 (96) are respectively connected to a driving shaft (92) through a driving rod 1 (97) and a driving rod 2 (98); one end of the driving rod 1 (97) and the driving rod 2 (98) are respectively hinged to the connecting rod 1 (95) and the connecting rod 2 (96); the other ends of the driving rod 1 (97) and the driving rod 2 (98) are rotatably connected to the driving shaft (92) and can slide axially along the driving shaft (92); the driving shaft (92) is connected to the driving screw (91) through a lifting adjustment rod (90).

6. A grinding machine with a circulating cooling system according to claim 5, characterized in that: A longitudinal slideway (901) is provided at the upper end of the lifting adjustment rod (90), a guide groove (902) is provided on the side wall of the longitudinal slideway (901), the guide groove (902) is slidably matched with a guide block (903) fixed on the driving screw rod (91), a rack (904) parallel to the longitudinal slideway (901) is provided on one side of the longitudinal slideway (901), and the rack (904) is meshed with a gear (905) fixed on the driving screw rod (91).

7. The grinding machine with a circulating cooling system according to claim 1, characterized in that: A circulating pump is provided in the circulating water tank (5), and the circulating pump is connected to the filter tank (32) through a connecting pipe.

8. The grinding machine with a circulating cooling system according to claim 1, characterized in that: A lighting device (10) and a machine box (11) are installed outside the main body (1) of the numerical control grinding machine.

9. A grinding machine with a circulating cooling system according to claim 8, characterized in that: The top and door of the CNC grinding machine body (1) are both provided with transparent windows (12).

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