Self-adaptively cooled heavy duty grinding wheel based on grinding force normal to the grinding zone

Abstract

The present invention discloses a heavy-duty grinding wheel that can be self-adaptively cooled based on the grinding force normal to the grinding area, including a grinding wheel base, a grinding block, a cooling spray bottle, a spray bottle nozzle, a plate-shaped heat pipe radiator, and a self-resetting mechanism. During operation, the grinding block enters the grinding area and is subjected to the normal grinding force, compressing the self-resetting mechanism and simultaneously pressing the cooling spray bottle, causing coolant to be sprayed from the spray bottle nozzle. The compression spring in the self-resetting mechanism is adjusted to set a critical value for the normal grinding force. When the normal grinding force falls below the critical value or the grinding block leaves the grinding area, the self-resetting device automatically resets the grinding block and the cooling spray bottle stops spraying coolant. Adaptive internal cooling of the heavy-duty grinding wheel is thus achieved. The present invention has a compact structure and can adjust the coolant jet flow rate in real time according to the working conditions, which can greatly improve the cooling and temperature-reducing effect, thereby effectively reducing the wear rate of the grinding wheel in heavy-load grinding and thereby extending the service life of the heavy-load grinding wheel.

Description

[Technical field]

[0001] [CROSS REFERENCE TO RELATED APPLICATIONS] This application claims priority from Chinese invention patent application No. 202011578088.7, filed on December 28, 2020, with the invention title “Heavy-duty grinding wheel with self-adaptive cooling based on grinding force normal to the grinding area.”

[0002] The present invention relates to the technical field of grinding tools, in particular to heavy duty grinding wheels capable of self-adaptive cooling based on grinding forces normal to the grinding area. [Background technology]

[0003] The development of heavy duty grinding wheels is dependent on the development of the steel industry, and they are mainly used in the steel industry for grinding steel ingots, slabs, and steel plates and cleaning the surfaces of various castings. Their working characteristics are large grinding pressure and high grinding efficiency. Heavy duty grinding wheels need to work under very high load pressure to achieve high speed and efficient grinding, so the requirements for the mechanical strength of the grinding wheels, which depends on the structure of the grinding wheels, are very high.

[0004] The invention patent with publication number "CN104308757A" and title of invention "Skeletal-type high-speed heavy-duty grinding wheel based on ultra-hard material and metal binder" provides a skeleton-type high-speed heavy-duty grinding wheel based on ultra-hard material and metal binder, the principle of which is to fix ultra-hard material and metal binder skeleton to the grinding wheel base by welding or resin bonding, and at the same time extrude filler between the ultra-hard material and metal binder skeleton, and finally manufacture a high-speed heavy-duty grinding wheel through dynamic balance or static balance, etc. The grinding wheel adopts ultra-hard material and metal binder skeleton to reduce costs, and has the characteristics of safe use, energy saving and environmental friendliness. However, the technical solution still has the following disadvantages:

[0005] 1. The grinding wheel cannot provide real-time feedback according to the actual working conditions. It can only perform grinding work, so if the grinding wheel receives excessive normal grinding force during grinding, it will be worn out and may be scrapped as a whole, which is a single function and is disadvantageous to the improvement of grinding quality.

[0006] 2. Poor coolant transport efficiency. In heavy-duty grinding, the rotation speed of the grinding wheel is high, so the coolant supplied from the external low-pressure system alone is not fast enough to penetrate the gas barrier layer around the grinding wheel, resulting in poor coolant transport efficiency and making it difficult to meet the needs of use.

[0007] 3. High maintenance costs. In heavy-duty grinding, the abrasives and grinding wheels are in a bad working environment, are easy to wear, and are expensive. If they are replaced as a whole, not only is the cost too high, but it also takes time and effort every time, which seriously affects the work efficiency.

[0008] 4. The heat dissipation effect inside the heavy-duty grinding wheel is poor. In heavy-duty grinding, the temperature of the grinding area is high, so the heat accumulated inside the grinding wheel is difficult to dissipate, which easily causes thermal damage to the grinding wheel and reduces the service life of the grinding wheel.

[0009] Therefore, there is a need to seek new technical solutions to solve the above problematic subject matter. Summary of the Invention [Means for solving the problem]

[0010] In order to solve problems such as the conventional heavy-duty grinding only having a single cooling method and the difficulty of directly supplying an external coolant injection device to the grinding area, which makes it difficult to timely feedback complex working conditions, the present invention discloses a heavy-duty grinding wheel that can be cooled self-adaptively based on the normal grinding force of the grinding area.

[0011] In order to achieve the above object, the present invention provides a heavy-duty grinding wheel that can be cooled self-adaptively based on the grinding force in the normal direction of the grinding area. The heavy-duty grinding wheel includes a grinding wheel base, a grinding block, a cooling spray bottle, a spray bottle nozzle, a plate-shaped heat pipe radiator, and a self-resetting mechanism. When the grinding wheel is rotating, the grinding block processes the workpiece and delivers the external cooling liquid to the grinding area. When the grinding force in the normal direction is greater than a set critical value, the grinding block compresses the self-resetting mechanism and simultaneously presses the cooling spray bottle, and then the spray bottle nozzle is released. Cooling liquid is sprayed from the cooling spray bottle nozzle, and when the normal grinding force falls below a critical value or the grinding block leaves the grinding work area, the self-resetting mechanism pushes the grinding block up again to reset it upward, and the cooling spray bottle stops spraying the cooling liquid. A plurality of grooves arranged in a ring array are opened on the outer circumferential surface of the grinding wheel base, and the grinding wheel base is integrally cast and machined, and screws, holes and rectangular displacement limiting bosses are machined in each groove, and an assembly hole is machined in the center of the grinding wheel base.

[0012] In addition, the bottom plate of the grinding block has an arch-shaped structure, and its upper end surface is equipped with an integrally sintered grinding unit, the grinding unit is consistent with the width of the grinding wheel, the grinding material is zirconium corundum, and a resin binder is selected. A through hole is both machined in the center of the grinding unit and the bottom plate, and a rectangular groove with a slope arranged in an array is directly machined on the inner wall of the through hole inside the grinding block, and the rectangular groove with a slope is conducive to the unidirectional transport of the coolant, so as to avoid the backflow of the coolant, and thereby effectively prevent the grinding chips from accumulating in the through hole.

[0013] Further, the cooling spray bottle includes a bottle body, a sealing rubber ring, a piston, a spring and a bottle base, the bottle body is compression molded from a silica gel material, the upper bottle body is a sawtooth extrusion bottle body, and the lower bottle body is a straight cylinder bottle body. A support shaft is attached to the upper end surface of the cooling spray bottle base, and the cylindrical shoulder of the support shaft is engaged in the engagement groove on the bottom surface of the piston, so as to limit the descending height of the piston. The sealing rubber ring is assembled between the bottle body and the piston, and its displacement is limited by the attachment groove on the outer cylinder surface of the piston, so as to ensure that the cooling liquid can only be sprayed from the bottle mouth. Before use, the cooling liquid is filled from the bottle mouth to maintain the compression state of the spring. During operation, when the cooling liquid in the upper bottle body is continuously consumed, the spring can push up the piston due to the reduction in the pressure load on its upper part, so that the horizontal surface of the cooling liquid can be constantly maintained, and the cooling liquid can be smoothly sprayed.

[0014] Furthermore, the spray bottle nozzle includes a nozzle sheath, a connecting rod, a nozzle base and an assembly screw, and the nozzle sheath, the connecting rod and the nozzle base are connected by the assembly screw. A plurality of rollers are provided at the point where the nozzle sheath contacts the connecting rod in the circumferential direction, and at the same time, the internal flow path of the nozzle sheath has a certain curvature, so that the cooling performance can be greatly improved.

[0015] Furthermore, the plate-shaped heat pipe radiator includes a copper piece and a copper bracket.

[0016] Furthermore, the self-resetting mechanism includes a supporting spindle, a mandrel, a thrust ball bearing, a supporting washer, a primary compression spring, a secondary compression spring, a holding plate, a supporting inner sleeve, and a baffle plate, and the self-resetting mechanism utilizes the compression spring to achieve the purpose of step-by-step feedback and adjustment, which can timely return the grinding block to its initial working position when it leaves the grinding area and is no longer subjected to the normal grinding force, or when the normal grinding force falls below a critical value.

[0017] In the first state, when the normal grinding force received becomes greater than the elastic force of the primary compression spring, the primary compression spring is compressed, and the supporting inner sleeve moves toward the presser plate.

[0018] In the second state, when the normal grinding force received becomes greater than the sum of the elastic forces of the primary compression spring and the secondary compression spring, the presser plate begins to compress the primary compression spring and the secondary compression spring.

[0019] Furthermore, the type of compression spring in the self-resetting mechanism can be selected according to the material of the workpiece, so that the critical value of the normal grinding force can be adjusted to accommodate a variety of grinding operation conditions. Compared with the prior art, the heavy-duty grinding wheel that can be self-adaptively cooled based on the normal grinding force in the grinding area has the following beneficial effects:

[0020] (1) It can provide timely feedback and adjustment according to real-time working conditions. It can reduce the damage of grinding force to the grinding wheel and extend the service life of the grinding wheel. It can set the critical value by changing the type of compression spring, and only when the pressure received reaches the set critical value, the compression amount of the spring will change with the increase of the load.

[0021] (2) A cooling spray bottle is installed inside the grinding wheel, which can be adaptively supplied. The grinding area of ​​the grinding wheel can be instantly cooled based on the operation of the external coolant injection device, and the inside and outside can jointly inject coolant. When the normal grinding force suddenly increases due to complex working conditions and reaches a critical value, the spray bottle is pressed, so that the coolant can be directly injected into the grinding area; when the normal grinding force falls below the critical value or the grinding unit is deactivated, the cooling spray bottle stops injecting coolant, and at the same time, the multi-stage compression spring design of the self-resetting mechanism can prevent the bottle from injecting too much coolant in one go. The piston propulsion mechanism at the bottom of the spray bottle can always ensure that the horizontal surface of the coolant is constant.

[0022] (3) The detachable grinding block greatly reduces the manufacturing cost of the grinding wheel. It can be replaced and maintained one by one, and the grinding block style required can be arbitrarily adjusted according to the actual working conditions, so that the processing efficiency can be significantly improved. The through hole in the center is machined with a rectangular groove with a gradient arranged in an array, which is helpful for the unidirectional transport of the coolant, so as to avoid the backflow of the coolant, thereby solving the problem of the grinding chips blocking the nozzle.

[0023] (4) Equipped with a plate-shaped heat pipe radiator, it can utilize the excellent thermal conductivity of the heat pipe to draw out the heat inside the grinding block and dissipate it through the fins. The plate-shaped heat pipe radiator has the advantages of compact structure and one-way heat transmission, so it can be suitable for efficient heat dissipation in a small space, improving the grinding environment and significantly reducing the thermal damage of the grinding wheel. [Brief description of the drawings]

[0024] [Figure 1] FIG. 2 is a front cross-sectional view of a heavy duty grinding wheel capable of self-adaptive cooling based on normal grinding force in the grinding area in a specific embodiment of the present invention. [Diagram 2] FIG. 2 is a local enlarged view of I in FIG. 1 according to a specific embodiment of the present invention. [Diagram 3] FIG. 2 is a schematic diagram showing the three-dimensional structure of a grinding wheel base according to a specific embodiment of the present invention. [Figure 4] FIG. 2 is a schematic diagram of the three-dimensional structure of a grinding block according to a specific embodiment of the present invention; [Diagram 5] FIG. 13 is a schematic diagram of a rectangular three-dimensional structure having a single slope in the central through-hole of a grinding block in a specific embodiment of the present invention. [Figure 6] 1 is a schematic view and a cross-sectional view of a three-dimensional structure of a cooling spray bottle according to a specific embodiment of the present invention. [Figure 7] FIG. 2 is a schematic diagram of the three-dimensional structure of an instant spray bottle nozzle in a specific embodiment of the present invention. [Figure 8] 1 is a schematic view and a cross-sectional view of a three-dimensional structure of a plate-shaped heat pipe radiator according to a specific embodiment of the present invention; FIG. [Figure 9] FIG. 2 is a schematic diagram of a rectangular three-dimensional structure with a single gradient in a plate-shaped heat pipe radiator according to a specific embodiment of the present invention; [Figure 10] 1A and 1B are schematic three-dimensional structural diagrams and cross-sectional views of a self-resetting mechanism in a specific embodiment of the present invention; [Explanation of symbols]

[0025] 1 Grindstone base 1.1 Groove 1.1.1 Screw 1.1.2 Holes 1.1.3 Rectangular Displacement Limiting Boss 2 Grinding blocks 2.1 Grinding unit 2.2 Bottom plate 2.3 Rectangular groove with slope 3. Cooling spray bottle 3.1 Bottle body 3.1.1 Upper bottle body 3.1.2 Lower Bottle Body 3.1.3 Bottle Mouth 3.2 Sealing rubber ring 3.3 Piston 3.3.1 Bottom locking groove 3.3.2 Mounting groove 3.4 Springs 3.5 Bottle Base 3.5.1 Locking convex ring 3.5.2 Support shaft 3.5.3 Cylindrical shoulder 4 spray bottle nozzles 4.1 Nozzle sheath 4.1.1 Nozzle flow path 4.2 Connecting rod 4.3 Nozzle Base 4.3.1 Round Hole 4.4 Assembly screws 5. Plate-type heat pipe radiator 5.1 Copper piece 5.1.1 Rectangular groove with slope 5.1.2 Sloped grooves 5.2 Copper bracket 5.2.1 Fins 5.3 Internal cavity 6 Self-resetting mechanism 6.1 Support spindle 6.2 Mandrel 6.3 Thrust ball bearings 6.4 Support Washers 6.5 Primary Compression Spring 6.6 Secondary Compression Spring 6.7 Retaining plate 6.8 Supporting inner sleeve 6.9 Baffle Plate DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] In order to allow those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention are described below clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, and are not all embodiments. Based on the embodiments of the present invention, all other embodiments that those skilled in the art can think of without creative efforts shall fall within the protection scope of the present invention.

[0027] As shown in Figures 1-2, Figures 1-2 are front views of the heavy-duty grinding wheel that can be self-adaptively cooled based on the grinding force in the normal direction of the grinding area of ​​the present invention, which mainly includes a grinding wheel base 1, a grinding block 2, a cooling spray bottle 3, a spray bottle nozzle 4, a plate-shaped heat pipe radiator 5 and a self-reset mechanism 6.

[0028] As shown in FIG. 3, four grooves 1.1 are formed on the outer peripheral surface of the grinding wheel base 1, and the grooves 1.1 form an annular array structure around the center of the grinding wheel base 1. The inside of the grooves 1.1 is machined with screws 1.1.1, holes 1.1.2 and rectangular displacement limiting bosses 1.1.3 for facilitating positioning and assembly. At the same time, an assembly hole is machined in the center of the grinding wheel base 1.

[0029] As shown in Figures 4-5, the grinding block 2 includes a grinding unit 2.1 and a bottom plate 2.2. Here, the bottom plate 2.2 is an arch-shaped structure, and the upper end surface thereof is equipped with an integrally sintered grinding unit 2.1, the width of the grinding unit 2.1 is consistent with the width of the grinding wheel, the grinding material is zirconium corundum, and a resin binder is selected, the center of the grinding unit 2.1 and the bottom plate 2.2 is machined with a through hole to facilitate the injection of the internal coolant, and the inner wall of the through hole is directly machined with a rectangular structure groove 2.3 with a gradient arranged in an array, and the rectangular structure groove 2.3 with a gradient is conducive to the unidirectional transport of the coolant, so that the backflow of the coolant can be avoided, and the bottom plate 2.2 of the grinding block 2 is bolted to a self-resetting mechanism 6.

[0030] As shown in Fig. 6, the cooling spray bottle 3 includes a bottle body 3.1, a sealing rubber ring 3.2, a piston 3.3, a spring 3.4, and a bottle base 3.5. The bottle body 3.1 is compression molded from a silica gel material, the upper bottle body 3.1.1 is a sawtooth-shaped extrusion bottle body, the lower bottle body 3.1.2 is a straight-cylindrical bottle body, the bottle mouth 3.1.3 is machined with a screw thread to be screwed with the spray bottle nozzle 4, the outer column surface of the bottle base 3.5 is provided with a locking protrusion ring 3.5.1, the inner wall of the bottle body 3.1 is provided with a locking ring groove to engage with the locking protrusion ring 3.5.1, and the bottom of the bottle base 3.5 is provided with a square groove for the grinding wheel base 1 to facilitate positioning of the cooling spray bottle 3. A rectangular groove is machined to engage with the shaped boss 1.1.3, a support shaft 3.5.2 is mounted on the upper end surface of the bottle base 3.5, and the cylindrical shoulder 3.5.3 of the support shaft 3.5.2 can be locked in the locking groove 3.3.1 on the bottom surface of the piston 3.3, so as to limit the lowering height of the piston 3.3, and a sealing rubber ring 3.2 is assembled between the bottle body 3.1 and the piston 3.3, which is limited in displacement by the mounting groove 3.3.2 on the outer column surface of the piston 3.3, so as to ensure that the cooling liquid can only be sprayed from the bottle mouth 3.1.3. Before use, the bottle mouth 3.1.3 is filled with cooling liquid to maintain the compression state of the spring 3.4, and when the cooling liquid in the upper bottle body 3.1.1 is continuously consumed during operation, the spring 3.4 can push up the piston 3.3 due to the reduction of the pressure load on the upper part, so that the horizontal surface of the cooling liquid can be always kept constant, so that the cooling liquid can be sprayed smoothly.

[0031] As shown in FIG. 7, the spray bottle nozzle 4 includes a nozzle sheath 4.1, a connecting rod 4.2, a nozzle base 4.3 and an assembly screw 4.4. The nozzle sheath 4.1, the connecting rod 4.2 and the nozzle base 4.3 are connected by the assembly screw 4.4, and a number of rollers are provided at the points where the nozzle sheath 4.1 contacts the connecting rod 4.2 in the circumferential direction, thereby realizing the rotation of the nozzle sheath 4.1 in the circumferential direction. When the spray bottle nozzle 4 is working, the nozzle sheath 4.1 is provided with a number of curved nozzle channels 4.1.1, so that each nozzle channel 4.1.1 can ensure that the cooling liquid is sprayed and the nozzle sheath 4.1 can be driven to rotate a certain angle in the circumferential direction. The nozzle base 4.3 is provided with a screw thread to screw into the bottle mouth 3.1.3, and the end face is provided with a number of round holes 4.3.1 whose cross-sectional area is much larger than that of the nozzle flow passage 4.1.1, thereby ensuring a stable output of the cooling liquid. When the cooling liquid inside the cooling spray bottle 3 runs low, the spray bottle nozzle 4 can be removed to refill it.

[0032] As shown in FIGS. 8-9, the plate-shaped heat pipe radiator 5 includes a copper piece 5.1 and a copper bracket 5.2.

[0033] (1) Select copper pieces as raw materials, which have high thermal conductivity and are suitable for laser processing.

[0034] (2) By performing femtosecond laser processing twice in succession on one side of the copper piece 5.1, a rectangular structure groove 5.1.1 having a gradient arranged in an array is processed, in which the rectangular structure groove 5.1.1 having a gradient arranged in an array is processed as a liquid-absorbing core in the first time, and a concave groove 5.1.2 having a specific shape of a cross section along the longitudinal direction of the copper piece and a plurality of gradients is processed in the second time. After two laser processings, a liquid-absorbing core having a rectangular surface structure is obtained.

[0035] (3) For the two copper pieces 5.1 processed in step (2), one side of the sloped rectangle of the two copper pieces 5.1 is placed opposite to each other, and the copper bracket 5.2 is placed between the two copper pieces 5.1, and then positioned and clamped with a jig. First, the two copper pieces 5.1 are fixedly connected by cold welding, and then the two copper pieces 5.1 and the copper bracket 5.2 are welded and sealed again by argon arc welding to obtain a plate-shaped heat pipe, which has a three-layer sealed structure of the copper piece 5.1, the copper bracket 5.2 and the copper piece 5.1, and the two copper pieces 5.1 and the copper bracket 5.2 jointly form an internal cavity 5.3.

[0036] (4) A hole for evacuation and injection is drilled on one of the copper pieces of the plate-shaped heat pipe by femtosecond laser drilling without heat-affected zone, and the plate-shaped heat pipe is evacuated by a vacuum injection machine, and a liquid working medium is injected into the inside of the plate-shaped heat pipe. The liquid working medium can be ethanol or acetone, etc., and can be selected according to the specific heat exchange needs. Then, the hole for evacuation and injection is sealed by laser welding.

[0037] (5) Fins 5.2.1 are attached to both sides of the copper bracket 5.2, and the plate-shaped heat pipe radiator 5 formed by welding can realize the integration of heat conduction and heat dissipation, and then they are uniformly arrayed and attached to the bottom plate 2.2 of the grinding block 2 by screw fastening.

[0038] As shown in Fig. 10, the self-resetting mechanism 6 includes a supporting shaft 6.1, a mandrel 6.2, a thrust ball bearing 6.3, a supporting washer 6.4, a primary compression spring 6.5, a secondary compression spring 6.6, a retaining plate 6.7, a supporting inner sleeve 6.8, and a baffle plate 6.9. The center of the supporting shaft 6.1 is machined with a threaded hole that can be positioned and assembled with the mandrel 6.2 and the screw 1.1.1, and the thrust ball bearings 6.3 are installed on both ends of the mandrel 6.2 to ensure that the mandrel 6.2 does not directly rub against other parts, and the supporting inner sleeve 6.8 is machined with a threaded hole on both sides to facilitate the bolt connection with the bottom plate 2.2 of the grinding block 2, and the compression spring can timely return the grinding block 2 to its initial working position under the condition that the grinding block 2 leaves the grinding area and is no longer subjected to the normal grinding force, or when the normal grinding force falls below a critical value. In the first state, when the normal grinding force is greater than the elasticity of the primary compression spring 6.5, the primary compression spring 6.5 is compressed and the supporting inner sleeve 6.8 moves toward the pressing plate 6.7. In the second state, when the normal grinding force is greater than the sum of the elasticity of the primary compression spring 6.5 and the elasticity of the secondary compression spring 6.6, the pressing plate 6.7 begins to compress the primary compression spring 6.5 and the secondary compression spring 6.6. These two compression springs can effectively prevent the cooling liquid in the cooling spray bottle 3 from being excessively sprayed during one grinding operation.

[0039] When the grinding wheel is working, the grinding unit 2.1 in the grinding block 2 grinds the workpiece and generates a normal grinding force. The self-resetting mechanism 6 has a large elastic modulus of the spring, so when the grinding wheel is working normally, the normal grinding force is small and the compression spring is not compressed. When the normal grinding force suddenly increases and reaches a critical value due to complex working conditions, the grinding unit 2.1 enters the grinding area and receives the normal grinding force, compresses the compression spring inside the self-resetting mechanism 6, presses the upper bottle body 3.1.1 of the cooling spray bottle 3, and sprays the cooling liquid in a spiral shape through the nozzle passage 4.1.1 of the spray bottle nozzle 4. Therefore, the grinding area of ​​the grinding wheel can be instantly cooled based on the operation of the external cooling liquid spraying device, and the normal grinding force can be reduced and the wear of the grinding wheel can be reduced. When the normal grinding force falls below the critical value or the grinding block 2 leaves the grinding work area, the compressed compression spring inside the self-resetting mechanism 6 can push the grinding block 2 up to reset it upward, so that the spraying of the cooling liquid from the cooling spray bottle 3 can be stopped.

[0040] Although the principle of the present invention has been described in detail above with reference to the preferred embodiments of the present invention, those skilled in the art should understand that the above embodiments are merely illustrative of exemplary implementation methods of the present invention and do not limit the scope of the present invention. The details in the embodiments do not limit the scope of the present invention, and any obvious modifications such as equivalent conversion, simple substitution, etc. based on the technical solutions of the present invention without departing from the spirit and scope of the present invention shall fall within the protection scope of the present invention.

Claims

1. A heavy duty grinding wheel capable of self-adaptive cooling based on the grinding force normal to the grinding area, The grinding wheel includes a grinding wheel base (1), a grinding block (2), a cooling spray bottle (3), a spray bottle nozzle (4), a plate-shaped heat pipe radiator (5), and a self-resetting mechanism (6). When the grinding wheel is rotating, the grinding block (2) processes the workpiece, and the spray bottle nozzle (4) is directed to the grinding area of ​​the workpiece, and the external coolant is delivered to the grinding area; When the normal grinding force exceeds a set critical value, the grinding block (2) compresses the self-resetting mechanism (6) and simultaneously presses the cooling spray bottle (3), and the cooling liquid is sprayed from the spray bottle nozzle (4) directly onto the grinding area; When the normal grinding force falls below a critical value or the grinding block (2) leaves the grinding area, the self-resetting mechanism (6) pushes the grinding block (2) up again to reset upward, and the cooling spray bottle stops spraying the cooling liquid; The grinding wheel base (1) has a plurality of grooves (1.1) on its outer periphery, the grooves (1.1) being formed by integral casting and machining, a screw (1.1.1), a hole (1.1.2) and a rectangular displacement limiting boss (1.1.3) are machined in each groove (1.1), and an assembly hole is machined in the center of the grinding wheel base (1), a grinding block (2), a cooling spray bottle (3), a spray bottle nozzle (4), a plate-shaped heat pipe radiator (5) and a self-resetting mechanism (6) are set in each groove (1.1), the grinding block (2) is set on the outside of the spray bottle nozzle (4), the plate-shaped heat pipe radiator (5) is set on both sides of the cooling spray bottle (3), and the self-resetting mechanism (6) is set on both sides of the plate-shaped heat pipe radiator (5). A heavy duty grinding wheel with self-adaptive cooling based on the grinding force normal to the grinding area.

2. The heavy-duty grinding wheel capable of self-adaptive cooling based on the grinding force normal to the grinding area as claimed in claim 1, characterized in that the bottom plate of the grinding block (2) is of an arch-shaped structure, and its upper end surface is equipped with an integrally sintered grinding unit (2.1), the grinding unit (2.1) is consistent with the width of the grinding wheel, the grinding material is zirconium corundum, and a resin binder is selected, and a through hole is machined in the center of both the grinding unit (2.1) and the bottom plate (2.2).

3. The cooling spray bottle (3) includes a bottle body (3.1), a sealing rubber ring (3.2), a piston (3.3), a spring (3.4) and a bottle base (3.5). The bottle body (3.1) is made of silica gel material and is compression molded. The upper bottle body (3.1.1) is a sawtooth extrusion bottle body, and the lower bottle body (3.1.2) is a straight cylinder bottle body. A support shaft (3.5.2) is attached to the upper end surface of the cooling spray bottle base (3.5). The cylindrical shoulder (3.5.3) of the support shaft (3.5.2) is engaged in the engagement groove (3.3.1) on the bottom surface of the piston, so as to limit the lowering height of the piston. A sealing rubber ring (3.2) is assembled between the bottle body (3.1) and the piston (3.3), and its displacement is limited by the attachment groove (3.3.2) on the outer cylindrical surface of the piston (3.3). and a seal is formed between the bottle body (3.1) and the piston (3.3), thereby ensuring that the cooling liquid can only be sprayed from the bottle mouth (3.1.3). Before use, the bottle mouth (3.1.3) is filled with cooling liquid to maintain the compression state of the spring (3.4). When the cooling liquid in the upper bottle body (3.1.1) is continuously consumed during operation, the spring (3.4) can push up the piston (3.3) due to the reduction in the pressure load on its upper side, so that the horizontal surface of the cooling liquid can be always kept constant, thereby allowing the cooling liquid to be sprayed smoothly.

4. The spray bottle nozzle (4) comprises a nozzle sheath (4.1), a connecting rod (4.2), a nozzle base (4.3) and an assembly screw (4.4); The nozzle sheath (4.1), the connecting rod (4.2) and the nozzle base (4.3) are connected by assembly screws (4.4), and a number of rollers are provided at the point where the nozzle sheath (4.1) contacts the connecting rod (4.2) in the circumferential direction, and at the same time, the internal flow path of the nozzle sheath (4.1) has a certain curvature, so that the cooling performance can be greatly improved.

5. The heavy-duty grinding wheel capable of self-adaptive cooling based on the grinding force normal to the grinding area as claimed in claim 1, characterized in that the plate-shaped heat pipe radiator (5) comprises a copper piece (5.1) and a copper bracket (5.2).

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