Grinding machine with low maintenance rate and using method thereof

Abstract

The invention relates to the technical field of grinding machines, in particular to a low-maintenance-rate grinding machine and a using method thereof.The low-maintenance-rate grinding machine comprises a machine base, the grinding machine is installed above the machine base and comprises a machine shell and a protective cover, motors are symmetrically installed at the two ends of the machine shell, and grinding wheels are detachably installed on output shafts of the motors and located in the protective cover; a counterweight device for adjusting the local density of the grinding wheel is fixedly mounted on the grinding wheel, the counterweight device comprises a circular ring coaxially fixed with the grinding wheel, a plurality of grooves distributed at equal intervals are formed in the circular ring from the peripheral surface to the center of the circular ring, and the plurality of grooves are filled with filling blocks with different weights. Compared with the prior art, by arranging the assembling device, the technical problems that in the prior art, due to the fact that the densities of all positions of the grinding wheel are different, the grinding wheel rotates in an unbalanced mode, the grinding machine vibrates seriously, and then parts of the grinding machine are seriously abraded and are prone to being damaged, and the overhaul rate is high are solved.

Description

Technical Field

[0001] The invention relates to the technical field of grinding machines, in particular to a low-maintenance-rate grinding machine and a use method thereof. Background Art

[0002] Grinding machines are a widely used power tool in the machinery industry, which are divided into bench grinders, flat grinders, etc. Among them, flat grinders used for surface finishing of metal plates of mechanical equipment are mainly used to finish the rough surface of metal plates of equipment (such as the joints of two steel plates welded on the ship deck and the joints of two steel plates welded on the bridge formwork), especially in the field of mechanical manufacturing equipment. When using existing flat grinders, it is necessary to manually hold the grinder body to trim the metal surface; or the flat grinder can be operated by machine tools or robots to trim the surface of metal plates.

[0003] Existing industrial or household grinding machines have a high maintenance frequency due to their high working intensity, complex structure and other comprehensive reasons. After analysis, the reasons for the high frequency maintenance of grinding machines include the following:

[0004] 1. During the use of the grinding machine, the whole machine vibrates seriously due to the unbalanced rotation of the grinding wheel. After long-term use, the parts are seriously worn, which aggravates the vibration of the grinding machine and leads to frequent maintenance of the grinding machine. After analysis, the difference in density of the grinding wheel is one of the reasons for the unbalanced rotation of the grinding wheel. Because the density of the grinding wheel is inconsistent, the force of the grinding wheel is different during the rotation, resulting in vibration.

[0005] 2. During the operation of the existing grinding machine, a large amount of heat will be generated in the bearings, motor spindles and other positions. If this heat is not processed, it is easy to affect the service life of parts such as bearings and motors; In response to this phenomenon, the prior art discloses an automatic cooling device for a grinding machine (patent number ZL20212048173.X, published on 20211022). This automatic cooling device for a grinding machine mainly achieves the effect of cooling the equipment by spraying water on both sides of the grinding wheel after atomization, and continuously dripping water on the top of the grinding wheel through a sponge block. However, this technical solution has the following defects in actual operation: Although the solution of spraying water on the equipment can achieve the technical effect of cooling, the contact between water and the grinding wheel will change the friction coefficient of the grinding wheel surface and reduce the grinding effect of the grinding wheel on the product; and the solution of winding cooling pipes on the equipment can also cool the equipment, but this solution can only cool the equipment wrapped with cooling pipes, which is highly targeted and cannot cool a large area. The cooling efficiency is low. Moreover, because the grinding wheel machines have different models and sizes, for small grinding wheel machines, winding cooling pipes on small local parts has complex installation process and small winding area. Therefore, this solution is not suitable for different models of grinding wheel machines; Summary of the invention

[0006] The present invention aims to provide a low-maintenance grinding machine and a method for using the same, which are mainly used to solve the technical problems in the prior art that the grinding wheel rotates unbalancedly due to density differences at different locations on the grinding wheel, thereby causing severe vibration of the grinding machine, which in turn causes severe wear of the grinding machine parts, easy damage, and a high maintenance rate.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0008] Option 1:

[0009] A low-maintenance grinding machine comprises a machine base, a grinding machine is installed on the machine base, the grinding machine comprises a machine casing and a protective cover, symmetrically arranged motors are installed at both ends of the machine casing, a grinding wheel is detachably installed on the output shaft of the motor and located in the protective cover, a counterweight device for adjusting the local density of the grinding wheel is fixedly installed on the grinding wheel, the counterweight device comprises a circular ring fixed coaxially with the grinding wheel, the circular ring is provided with a plurality of grooves distributed equidistantly from the outer circumference to the center of the circular ring, and a plurality of the grooves are filled with filling blocks of different weights.

[0010] The technical principles and beneficial effects of this solution are as follows:

[0011] In order to slow down the unbalanced rotation of the grinding wheel, a counterweight device is coaxially fixed on the grinding wheel. Several grooves arranged on the circular ring of the counterweight device are used to fill filling blocks of different weights. When it is detected that the density of a certain place on the grinding wheel is lower, the overall density of the lower density part of the grinding wheel is changed by filling filling blocks of corresponding weight in the groove close to the lower density part to make it close to the other densities, thereby reducing the unbalanced vibration caused by the density difference in various places during the rotation of the grinding wheel.

[0012] This solution mainly adjusts the density of the grinding wheel at various locations through a counterweight device so that the overall density of the grinding wheel can be corrected, reducing the equipment vibration phenomenon caused by uneven density. It solves the technical problem in the prior art that the grinding wheel rotates unbalancedly due to differences in density at various locations of the grinding wheel, thereby causing severe vibration of the grinding machine, which in turn causes severe wear of the grinding machine parts, easy damage, and a high maintenance rate.

[0013] Preferably, the filling block comprises an instant glue that can be quickly solidified after contact with air. When the density of the grinding wheel needs to be corrected, the instant glue is dripped into the groove near the grinding wheel with lower density, and the instant glue is waited for to gel in the groove to increase the density of the grinding wheel at that location; by repeating the above steps, the density of each location of the grinding wheel is continuously adjusted until the density of each location of the grinding wheel is balanced.

[0014] Preferably, a plurality of stoppers are fixed on the inner wall of the groove. When the instant glue is dripped into the groove, the instant glue flows into the bottom of the groove and solidifies, and the solidified instant glue fits with the plurality of stoppers and is not easy to fall out of the groove.

[0015] Preferably, a rubber layer is fixed at the bottom of the grinding machine. The rubber layer is used to reduce the resonance interference of the grinding machine on the machine base when the grinding machine vibrates, prevent the grinding machine vibration from causing the machine base to wear, and at the same time, the rubber layer is provided to further alleviate the overall vibration of the grinding machine.

[0016] Preferably, the machine base is hollow and has a collecting port at the bottom of the grinding wheel. An air inlet pipe and a water tank filled with water are provided inside the machine base. One end of the air inlet pipe is connected to the collecting port, and the other end is inserted into the water tank and extends below the water surface. A first air outlet pipe is connected above the water tank, and one end of the first air outlet pipe connected to the water tank is located above the water surface. An end of the first air outlet pipe away from the water tank is connected to a refrigeration device for cooling the air. The air outlet end of the refrigeration device is connected to an air pump, and the air outlet end of the air pump is connected to a second air outlet pipe, and one end of the second air outlet pipe away from the air pump is inserted into the protective cover from above the protective cover.

[0017] When the vacuum pump is turned on, the entire pipeline system starts working, and the external gas enters the air inlet pipe through the collection port, and the debris generated during the grinding process of the grinding wheel is sucked into the air inlet pipe. The air mixed with the debris is sucked below the water surface in the water tank, and the temperature of the air washed by water decreases, and the debris mixed in the air is retained in the water, and the clean air after washing enters the refrigeration device through the first air outlet pipe for secondary cooling, and is sent to the protective cover through the vacuum pump and the second air outlet pipe, and the parts in the protective cover (including bearings, motor output shafts, grinding wheels, etc.) are cooled; and the cold air is blown downward from the top of the protective cover, so that the debris generated during the grinding process is blown into the collection port, further improving the efficiency of collecting debris.

[0018] The beneficial effects of this program are as follows:

[0019] 1. This solution uses air circulation to cool the hot air brought out of the protective cover through a water tank, which reduces the workload of the subsequent refrigeration device, and then cools it twice through the refrigeration device, and finally blows it into the protective cover to cool the parts in the protective cover over a large area. Compared with the water spray cooling solution in the prior art, this solution will not affect the friction coefficient of the grinding wheel. Compared with the solution of winding the cooling pipe in the prior art, this solution does not require too much installation space, is simple to install, has a large cooling area, and has high cooling efficiency;

[0020] 2. In this solution, air is blown into the protective cover, and at the same time, air is sucked by setting a collection port under the grinding wheel, so that the air around the grinding wheel is more inclined to flow toward the collection port, driving the debris generated by grinding into the collection port, keeping the working environment clean, and preventing operators from inhaling a large amount of dust; at the same time, the collected debris is washed into the water, and the debris dust is avoided during cleaning, and only the sewage needs to be discharged and replaced with clean water;

[0021] 3. In this solution, the air introduced into the protective cover is washed with water and has a high moisture content. The air with a high moisture content is sprayed onto the high-temperature equipment. The evaporation of water can more easily take away the heat from the equipment, further improving the cooling effect on the components in the protective cover.

[0022] Preferably, a collection cover with an opening range gradually increasing from bottom to top is provided at the collection port and above the machine base. The provision of the collection cover can prevent debris from being ejected everywhere, thereby improving the collection efficiency of debris.

[0023] Preferably, the collecting port is covered with a mesh plate, which can prevent the product from accidentally falling into the air inlet pipe during the grinding process.

[0024] Preferably, a plurality of balls supported by magnetic materials are placed in the water tank. The arrangement of the balls can adsorb the magnetic metals in the debris in the water body, and the balls can be separated individually to recover the magnetic metals in the debris. In addition, in this solution, the inlet pipe port is deep below the water surface and air is continuously introduced into the water, which can stir the precipitated impurities in the water body, so that the magnetic metals wrapped by the impurities are exposed and adsorbed by the balls, further improving the recovery of the magnetic metals in the debris impurities.

[0025] Preferably, the side seal of the water tank is provided with an observation window for observing the turbidity of the water in the tank.

[0026] Option 2:

[0027] A method for using a low-maintenance grinding machine comprises the following steps:

[0028] S1: insert the ring and the middle of the commercially available grinding wheel into the rotating shaft, and fix the surface of the ring with the surface of the grinding wheel, and the rotating shaft and the mounting hole in the middle of the grinding wheel are interference fit; mark a number of numbers on the surface of the ring, and each groove corresponds to an independent number;

[0029] S2: Assemble the inspection frame, which includes two inspection plates whose upper surfaces are located at the same horizontal plane. The inspection plates are fixed to the workbench by bolts. The height of the inspection plates is greater than the radius of the ring in the counterweight device of the grinder, and the two inspection plates are kept at a distance. After the inspection frame is assembled, the counterweight device, grinding wheel, and rotating shaft assembled in step S1 are placed on the inspection plate. The counterweight device and grinding wheel are located between the two inspection plates, and the rotating shaft is placed on the upper surfaces of the two inspection plates.

[0030] S3: Gently push the rotating shaft to roll on the detection plate, and observe whether each number can be stationary at different positions around the rotating shaft. If there is a certain number that is always located above the rotating shaft, it proves that the local position density of the grinding wheel corresponding to the groove corresponding to the number is small, and then drip a small amount of instant glue into the groove for multiple times. After the instant glue solidifies, push the grinding wheel to observe the rotation of the grinding wheel until the number corresponding to the groove can be stationary at any position around the rotating shaft; calibrate multiple times until each number on the ring can be freely stationary at any position around the rotating shaft, and the calibration is completed;

[0031] S4: Transfer the calibrated grinding wheel and the ring fixed on the grinding wheel to the motor spindle for installation, start the motor, observe the vibration of the entire grinding machine, and use the noise detection device to detect the equipment noise. If the noise of the grinding machine in the idling state is greater than 80 decibels, re-calibrate the grinding wheel density. If it is less than 80 decibels, the grinding machine can be put into normal operation.

[0032] S5: The grinding machine works normally, and the vacuum pump is started. The vacuum pump draws cold air from the refrigeration device into the protective cover on the grinding machine to cool down the parts of the grinding machine.

[0033] The working principle and beneficial effects of this scheme are as follows: the grinding machine first passes through density detection and then density correction to reduce the unbalanced rotation caused by the grinding wheel density, thereby reducing the vibration of the grinding machine during operation, and then the vacuum pump is started to allow the cold air in the refrigeration device to cool down the parts of the grinding machine for protection; in summary, through density correction and temperature reduction protection, the safe and stable operation of the grinding machine is guaranteed, the maintenance rate of the grinding machine is reduced, and the service life of the grinding machine is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 The three-dimensional structure of the present invention patent Figure 1 ;

[0035] Figure 2 It is a partial exploded view of the patent of the present invention;

[0036] Figure 3 The three-dimensional structure of the present invention patent Figure 2 ;

[0037] Figure 4 The three-dimensional structure of the present invention patent Figure 3 ;

[0038] Figure 5 It is a side view of the counterweight block of the patent of the present invention;

[0039] Figure 6 For the patent of this invention Figure 5 AA section view;

[0040] Figure 7 It is a side view of the patent of the present invention;

[0041] Figure 8 For the patent of this invention Figure 7 BB cross-section diagram;

[0042] Fig. 9 This is a three-dimensional structural diagram of the grinding wheel density calibration of the patented invention.

[0043] The figure marks in the drawings of the specification include: base 1, casing 21, protective cover 22, motor output shaft 23, grinding wheel 24, counterweight device 25, groove 251, limit block 252, mesh plate 31, collection cover 32, air inlet pipe 33, water tank 34, ball 341, first air outlet pipe 35, observation window 36, refrigeration device 37, second air outlet pipe 38, vacuum pump 39, detection plate 41, rotating shaft 42. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not 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.

[0045] Embodiment 1:

[0046] like Figure 1 As shown, a low maintenance rate grinding machine includes a machine base 1, a grinding machine is installed on the machine base 1, a rubber layer is fixed to the bottom of the grinding machine (the rubber layer is arranged at the bottom of the grinding machine, and is thin as a whole, and cannot be seen from the perspective of the figure, so it is not drawn), the grinding machine includes a housing 21 and a protective cover 22, which are used to reduce the resonance interference of the machine base 1 when the grinding machine vibrates, and prevent the grinding machine vibration from causing the machine base 1 to wear. At the same time, the rubber layer is set to further alleviate the overall vibration of the grinding machine;

[0047] like Figure 3 , Figure 5 , Figure 6 As shown, symmetrically arranged motors are installed at both ends of the housing 21, and a grinding wheel 24 is detachably installed on the output shaft of the motor and located in the protective cover 22. A counterweight device 25 for adjusting the local density of the grinding wheel 24 is fixedly installed on the grinding wheel 24. The counterweight device 25 includes a circular ring coaxially bonded to the grinding wheel 24, and the circular ring is provided with a plurality of grooves 251 distributed equidistantly from the outer circumference to the center of the circular ring. A plurality of limit blocks 252 are fixed to the inner wall of the groove 251, and a plurality of the grooves 251 are filled with filling blocks of different weights ( Figure 6 The counterweight device 25 is in an unused state, and after the density of each grinding wheel machine is corrected, the filling block in the groove 251 is in a different state, so the filling block is not drawn). The main material of the filling block is instant glue. The instant glue can be selected from one or more of the instant glues such as 502 glue, epoxy resin ab glue, cyanoacrylate adhesive, two-component cyanoacrylate adhesive, etc. At the same time, the filling block can also be selected from high-temperature resistant thermoplastic plastics, such as polytetrafluoroethylene, polyphenylene sulfide, etc. The specific method of use is that when the density of the grinding wheel 24 needs to be corrected, the instant glue (or plastic droplet) is dripped into the groove 251 near the grinding wheel 24 with lower density, and the instant glue (or plastic) flows into the bottom of the groove 251 and condenses. The condensed instant glue (or plastic) fits with several limit blocks 252 and is not easy to fall out of the groove 251, thereby increasing the density of the grinding wheel 24 at this location; by repeating the above steps, the density of each part of the grinding wheel 24 is continuously adjusted until the density of each part of the grinding wheel 24 is balanced.

[0048] Combination Fig. 9 For the structure shown, the density correction process of the grinding machine is as follows:

[0049] S1: insert the ring and the middle of the commercially available grinding wheel 24 into the rotating shaft 42, and fix the surface of the ring to the surface of the grinding wheel 24, and the rotating shaft 42 and the mounting hole in the middle of the grinding wheel 24 are interference fit; mark a number of numbers on the surface of the ring with a marker, and each groove 251 corresponds to an independent number (the attached figure marked with numbers is not drawn, that is, the core of this scheme is to express that the surface of each groove 251 is individually marked to distinguish the groove 251 body and identify the positions of different grooves 251);

[0050] S2: Assemble the detection frame, which includes two detection plates 41 whose upper surfaces are located at the same horizontal plane. The detection plates 41 are fixed to the workbench by bolts. The height of the detection plate 41 is greater than the radius of the ring in the counterweight device 25 of the grinding machine, and the two detection plates 41 are kept at a distance. After the detection frame is assembled, the counterweight device 25, the grinding wheel 24, and the rotating shaft 42 assembled in step S1 are placed on the detection plate 41. The counterweight device 25 and the grinding wheel 24 are located between the two detection plates 41, and the rotating shaft 42 is placed on the upper surfaces of the two detection plates 41;

[0051] S3: Gently push the rotating shaft 42 to roll on the detection plate 41, and observe whether each number can be stationary at different positions around the rotating shaft 42. If there is a number that is always located above the rotating shaft 42, it proves that the local position density of the grinding wheel 24 corresponding to the groove 251 corresponding to the number is relatively small, and then drip a small amount of instant glue into the groove 251 multiple times until the number corresponding to the groove 251 can be stationary at any position around the rotating shaft 42; calibrate multiple times until each number on the ring can be freely stationary at any position around the rotating shaft 42, and the calibration is completed.

[0052] In this scheme, the density of each part of the grinding wheel 24 is adjusted mainly through the counterweight device 25, so that the overall density of the grinding wheel 24 is corrected, and the equipment vibration phenomenon caused by uneven density is reduced. The technical problem that the grinding wheel 24 rotates unbalancedly due to the difference in density of each part of the grinding wheel 24 in the prior art is solved, thereby causing serious vibration of the grinding machine, and further causing serious wear of the grinding machine parts, easy damage, and high maintenance rate.

[0053] Embodiment 2:

[0054] like Figure 4 , Figure 7 , Figure 8 As shown, based on Example 1, Example 2 is further improved:

[0055] The machine base 1 in Example 1 is hollow and has a collecting port located below the grinding wheel 24. A collecting cover 32 with an opening range gradually increasing from bottom to top is provided at the collecting port and above the machine base 1 to prevent debris from being ejected everywhere and improve the efficiency of collecting debris. The collecting port is covered with a mesh plate 31 to prevent the product from accidentally falling into the air intake pipe 33 during the grinding process.

[0056] like Figure 8 As shown, an air inlet pipe 33 and a water tank 34 filled with water are provided inside the base 1, and an observation window 36 for observing the turbidity of the water in the tank is sealed on the side of the water tank 34, one end of the air inlet pipe 33 is connected to the collecting port, and the other end is inserted into the water tank 34 and extends below the water surface; a first air outlet pipe 35 is connected above the water tank 34, and one end of the first air outlet pipe 35 connected to the water tank 34 is located above the water surface, and one end of the first air outlet pipe 35 away from the water tank 34 is connected to a refrigeration device 37 for cooling the air (the refrigeration device 37 can use a dry air cooler), and the air outlet end of the refrigeration device 37 is connected to an air extraction pump 39, and the air outlet end of the air extraction pump 39 is connected to a second air outlet pipe 38, and there are two second air outlet pipes 38, and the ends of the two second air outlet pipes 38 away from the air extraction pump 39 are respectively inserted into the protective cover 22 from the top of the two protective covers 22;

[0057] like Figure 8 As shown, a plurality of balls 341 supported by magnetic materials are placed in the water tank 34. The arrangement of the balls 341 can adsorb the magnetic metal in the debris in the water body, and the balls 341 can be separated separately to recover the magnetic metal in the debris. The inlet pipe port goes deep under the water surface and air is continuously introduced into the water, which can stir the precipitated impurities in the water body, so that the magnetic metal wrapped by the impurities is exposed and adsorbed by the balls 341, further improving the recovery of the magnetic metal in the debris impurities.

[0058] The specific implementation of this scheme is as follows:

[0059] S1: Transfer the calibrated grinding wheel 24 and the ring fixed on the grinding wheel 24 to the motor spindle for installation, start the motor, observe the vibration of the entire grinding machine, and use a noise detection device to detect the equipment noise. If the noise of the grinding machine in the idling state is greater than 80 decibels, re-calibrate the density of the grinding wheel 24. If it is less than 80 decibels, the grinding machine can be put into normal operation;

[0060] S2: The grinding machine works normally, and the vacuum pump 39 is started. The vacuum pump 39 draws cold air in the refrigeration device 37 into the protective cover 22 on the grinding machine to cool the parts of the grinding machine.

[0061] In this solution, the hot air brought out of the protective cover 22 is cooled once through the water tank 34 through air circulation, which reduces the workload of the subsequent refrigeration device 37, and then cooled twice through the refrigeration device 37, and finally blown into the protective cover 22 to cool the parts in the protective cover 22 over a large area. Compared with the water spray cooling solution in the prior art, this solution will not affect the friction coefficient of the grinding wheel 24. Compared with the solution of winding the cooling pipe in the prior art, this solution does not require too much installation space, is simple to install, has a large cooling area, and has high cooling efficiency. At the same time, the second air outlet pipe 38 in this solution is directed toward the protective cover 22. Internal air blowing is carried out by inhaling air through a collecting port set below the grinding wheel 24, so that the air around the grinding wheel 24 is more inclined to flow toward the collecting port, driving the debris generated by grinding into the collecting port, keeping the working environment clean, and preventing the operator from inhaling a large amount of dust; at the same time, the collected debris is washed into the water, and the debris is prevented from raising dust during cleaning. It is only necessary to discharge the sewage and replace it with clean water; and in this scheme, the air introduced into the protective cover 22 is washed with water and has a higher water content. The air with a higher water content is sprayed onto the high-temperature equipment, and the evaporation of water makes it easier to take away the heat on the equipment, further improving the cooling effect on the components in the protective cover 22.

[0062] In summary, compared with Example 1, this solution sets a collecting port, an air inlet pipe 33, a water tank 34, a first air outlet pipe 35, a second air outlet pipe 38, and a refrigeration device 37 to cool the parts of the grinding machine, further reducing the loss rate of the grinding machine, thereby reducing the maintenance rate of the grinding machine and increasing the service life of the grinding machine.

[0063] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A low maintenance grinding machine, comprising a machine base, a grinding machine installed on the machine base, the grinding machine comprising a housing and a protective cover, symmetrically arranged motors are installed at both ends of the housing, a grinding wheel is detachably installed on the output shaft of the motor and in the protective cover, characterized in that: A counterweight device for adjusting the local density of the grinding wheel is fixedly installed on the grinding wheel. The counterweight device includes a circular ring fixed coaxially with the grinding wheel. The circular ring is provided with a plurality of grooves distributed equidistantly from the outer circumference to the center of the circular ring. The plurality of grooves are filled with filling blocks of different weights.

2. A low maintenance grinding machine according to claim 1, characterized in that: The filling block comprises an instant adhesive which can be quickly solidified after contact with air.

3. A low maintenance grinding machine according to claim 2, characterized in that: A plurality of limiting blocks are fixed on the inner wall of the groove.

4. A low maintenance grinding machine according to claim 3, characterized in that: A rubber layer is fixed on the bottom of the grinding machine.

5. A low maintenance grinding machine according to claim 1, characterized in that: The machine base is hollow, and a collecting port is provided at the machine base below the grinding wheel. An air inlet pipe and a water tank filled with water are provided inside the machine base. One end of the air inlet pipe is connected to the collecting port, and the other end is inserted into the water tank and extends below the water surface. A first air outlet pipe is connected above the water tank, and one end of the first air outlet pipe connected to the water tank is located above the water surface. An end of the first air outlet pipe away from the water tank is connected to a refrigeration device for cooling the air, and an air outlet end of the refrigeration device is connected to an air pump, and an air outlet end of the air pump is connected to a second air outlet pipe, and an end of the second air outlet pipe away from the air pump is inserted into the protective cover from above the protective cover.

6. A low maintenance grinding machine according to claim 5, characterized in that: A collection cover with an opening range gradually increasing from bottom to top is arranged at the collection port and above the machine base.

7. The low maintenance grinding machine according to claim 6 is characterized in that: The collecting port is covered with a mesh plate.

8. A low maintenance grinding machine according to claim 7, characterized in that: A plurality of spherical balls supported by magnetic materials are placed in the water tank.

9. A low maintenance grinding machine according to claim 8, characterized in that: The side seal of the water tank is provided with an observation window for observing the turbidity of the water in the tank.

10. A method for using a low maintenance grinding machine, characterized in that: A low maintenance grinding machine as described in claims 1 to 9, comprising the following steps: S1: insert the ring and the middle of the commercially available grinding wheel into the rotating shaft, and fix the surface of the ring with the surface of the grinding wheel, and the rotating shaft and the mounting hole in the middle of the grinding wheel are interference fit; mark a number of numbers on the surface of the ring, and each groove corresponds to an independent number; S2: Assemble the inspection frame, which includes two inspection plates whose upper surfaces are located at the same horizontal plane. The inspection plates are fixed to the workbench by bolts. The height of the inspection plates is greater than the radius of the ring in the counterweight device of the grinder, and the two inspection plates are kept at a distance. After the inspection frame is assembled, the counterweight device, grinding wheel, and rotating shaft assembled in step S1 are placed on the inspection plate. The counterweight device and grinding wheel are located between the two inspection plates, and the rotating shaft is placed on the upper surfaces of the two inspection plates. S3: Gently push the rotating shaft to roll on the detection plate, and observe whether each number can be stationary at different positions around the rotating shaft. If there is a certain number that is always located above the rotating shaft, it proves that the local position density of the grinding wheel corresponding to the groove corresponding to the number is small, and then drip a small amount of instant glue into the groove for multiple times. After the instant glue solidifies, push the grinding wheel to observe the rotation of the grinding wheel until the number corresponding to the groove can be stationary at any position around the rotating shaft; calibrate multiple times until each number on the ring can be freely stationary at any position around the rotating shaft, and the calibration is completed; S4: Transfer the calibrated grinding wheel and the ring fixed on the grinding wheel to the motor spindle for installation, start the motor, observe the vibration of the entire grinding machine, and use the noise detection device to detect the equipment noise. If the noise of the grinding machine in the idling state is greater than 80 decibels, re-calibrate the grinding wheel density. If it is less than 80 decibels, the grinding machine can be put into normal operation. S5: The grinding machine works normally, and the vacuum pump is started. The vacuum pump draws cold air from the refrigeration device into the protective cover on the grinding machine to cool down the parts of the grinding machine.

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