Composite cup-shaped grinding wheel with outer ring capable of buffering impact grinding surface and inner ring capable of preventing crushing

Abstract

The application provides a composite cup-shaped grinding wheel with an outer ring capable of buffering impact and an inner ring capable of preventing crushing, comprising a base and a ring-shaped abrasive layer, wherein the ring-shaped abrasive layer is formed by implanting at least a first abrasive entity in the shape of a long strip into a metal abrasive ring of a resin binder abrasive layer and another binder abrasive entity, and the other binder abrasive entity comprises ceramic, metal and organic binder abrasive entities in the shape of a strip or a triangle. The composite cup-shaped grinding wheel has high impact resistance and strong grinding capacity at the outer ring position, and has high crushing resistance and wear resistance at the inner ring position. The comprehensive grinding performance of two or more binder abrasive layers is combined, the smooth state of the grinding surface of the grinding wheel is maintained, the manufacturing process is simple and easy to implement, the processing efficiency of ceramic tiles is improved, the processing cost is reduced, and the automatic manufacturing of the split grinding wheel is facilitated.

Description

Technical Field

[0001] This invention relates to the field of ceramic tile grinding wheel technology, and more specifically, to a composite cup-shaped grinding wheel with an outer ring that can buffer the impact grinding surface and an inner ring that can prevent crushing. Background Technology

[0002] For normal grinding of the edges of ceramic tiles, the cup-shaped grinding wheel has a natural wear-in angle corresponding to the depth of cut. In the front ring working mode (this invention uses this mode as an example), the ceramic tile is ground by moving from the outer diameter part of the grinding wheel, through the middle diameter part, and through the inner diameter part. Due to the different circumferences and linear velocities of the outer diameter part and the inner diameter part, the grinding surface of the grinding wheel is actually formed as an arc surface. Under the same ring width, the amount of work done near the outer diameter part is greater than that near the middle diameter part, and the amount of work done near the middle diameter part is greater than that near the inner diameter part. That is, the annular surface area of ​​the grinding surface is proportional to the amount of work done. The larger the annular surface area of ​​the grinding surface, the greater the corresponding amount of work done. Therefore, the grinding capability is mainly reflected on the grinding surface near the outer diameter part, while the grinding quality is mainly achieved by the inner diameter part.

[0003] After sintering, ceramic tiles exhibit poor dimensional consistency and large dimensional tolerances, requiring adjustment using grinding wheels. Currently, equipment using conveyor belts to feed ceramic tiles into a double-sided grinding machine is employed. However, the inconsistent tile sizes prevent the tiles from entering the grinding machine with high precision and stability. Instead, the tiles often enter with an uncertain amount of sway. This sway causes significant fluctuations in the machining amount on both sides of the grinding wheel as the tile enters from the outer diameter. When the machining amount exceeds the set depth of cut, overload grinding occurs. At higher conveying speeds, if the machining amount exceeds the set grinding angle height (normally, the grinding angle height h equals the depth of cut), the ceramic tile will impact the outer diameter of the grinding wheel. The negative effects will vary depending on the bonding agent used in the grinding wheel.

[0004] When using metal-bonded grinding wheels, the high strength, heat resistance, and wear resistance (though relatively poor sharpness) of the grinding wheel itself do not significantly affect the ceramic tiles. However, ceramic tiles are prone to burns, chipping, corner breakage, cracks, and shattering, leading to a decrease in product yield. In situations with high conveying speeds, the situation is even worse. Therefore, metal-bonded grinding wheels are usually not chosen under such conditions, as they would result in an excessively low yield of processed ceramic tiles.

[0005] When resin-bonded grinding wheels are used, due to their low strength, poor wear resistance (relatively high sharpness), and poor heat resistance, the grinding wheels are prone to phenomena such as loss of the grinding angle, burning and step formation on the grinding surface, chipping, and cracking. After the grinding surface loses its shape and forms steps, the normal distribution of grinding amount at each radial point on the grinding surface of the grinding wheel will be disrupted. The machining amount near the inner diameter will be overloaded, resulting in a significant decrease in grinding quality. Furthermore, due to the local mismatch of grinding amount, increased grinding heat, and increased burn rate of the resin-bonded grinding wheel, the grinding wheel will wear out quickly and have a short lifespan. In addition, the accidental occurrence of grinding wheel cracking caused by the overload of machining amount is greatly increased.

[0006] The use of resin-bonded grinding wheels increases processing costs due to their relatively short lifespan, but results in a relatively low rate of ceramic tile scrap. Therefore, existing production processes, especially at high conveying speeds, mostly use resin-bonded grinding wheels with enhanced grinding capabilities to ensure a high processing yield. The stronger grinding force (i.e., sharpness) helps to mitigate overload and maintain a certain level of production efficiency. However, this technology generally reduces the strength and wear resistance of resin grinding wheels, resulting in a shorter lifespan, higher tooling costs, and the risk of grooves and steps on the grinding surface of the grinding wheel, as well as wheel damage and breakage, rendering the wheel unusable.

[0007] Existing technologies employ metal-bonded abrasive teeth (including brazed teeth) embedded in a resin abrasive layer to form a composite structure for the grinding wheel. These teeth are arranged in various ways, including radially fully covered grinding rings and radially partially covered grinding rings (evenly distributed near the inner, middle, or outer diameter of the grinding ring), to improve wheel life, expand the application range of brazing, achieve multi-layer composite grinding of brazed diamond, and improve grinding quality. Examples include patent invention numbers ZL201810126934.8 and ZL201711377409.5. However, these patented technologies are only suitable for relatively stable working conditions where metal-bonded (including brazed) teeth are the primary grinding agent and the resin abrasive layer provides auxiliary grinding. They do not address technical solutions for harsh working conditions, impact protection of the grinding wheel, protection of the grinding surface morphology, smooth transition of performance at radial points on the grinding surface, and prevention of cracking. Summary of the Invention

[0008] The purpose of this invention is to address the technical problems of existing composite grinding wheels by combining formulation with structural design, thereby solving the technical problem that the performance differences at various radial points on the grinding surface cause the outer ring of the grinding wheel to impact the grinding surface and the inner ring to crack when the composite cup-shaped grinding wheel is overloaded.

[0009] Fundamentally, this solution aims to address or alleviate the problems currently encountered in ceramic tile grinding, such as the loss of the grinding angle, step formation on the grinding surface, disruption of the normal distribution of grinding amount at various radial points on the grinding surface, and easy cracking of the grinding wheel caused by overload grinding of resin-bonded cup-shaped grinding wheels. It also aims to prevent the inner ring from being crushed.

[0010] 1. The mechanism by which the outer ring of the composite cup-shaped grinding wheel buffers the grinding surface is as follows: The composite abrasive layer of the composite cup-shaped grinding wheel consists of a resin-bonded abrasive layer with another abrasive entity embedded within it. The abrasive entity can be strip-shaped, triangular, or similar. The other binder can be ceramic, metal, organic, or similar materials. This invention uses a metal binder as an example. The abrasive entity can have different sizes, shapes, and properties. This invention adjusts the grinding performance at various radial points of the grinding wheel by arranging the properties, size, shape, and quantity of the metal-bonded abrasive entities embedded in the resin abrasive layer. This adapts to complex working conditions, buffering the impact of ceramic bricks on the grinding wheel, mitigating overload and overheating burns caused by the random amplification of the depth of cut, ensuring a smooth transition of the grinding surface, avoiding steps on the grinding surface, harmonizing the comprehensive grinding performance of the two binder abrasive layers, and achieving anti-crack capability of the inner ring.

[0011] 2. The anti-crack mechanism of the inner ring of the composite cup-shaped grinding wheel is as follows: Because the grinding amount of a grinding wheel with the same ring width is less near the smaller diameter than near the larger diameter, moderately reducing the grinding capacity of the inner ring can still meet the overall grinding capacity of the grinding wheel. Therefore, by setting several abrasive entities B in the area (T2+T3+T4) outside the grinding wheel's buffer impact functional structure area (ring width T1), the wear resistance of the grinding ring in area (T2+T3+T4) is improved, ensuring a transition from T1 with a resin-bonded abrasive layer as the grinding body to (T2+T3+T4) with a metal-bonded abrasive entity as the grinding body. The structure of densely arranged abrasive entities A and B enhances the strength of the area (T2+T3+T4) outside the grinding wheel's buffer impact functional structure area (ring width T1), preventing the inner ring from being cracked when ceramic tiles break. Similarly, abrasive entities C, D, etc., can be added to further enhance the grinding wheel's overall grinding capacity.

[0012] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0013] A composite cup-shaped grinding wheel with an outer ring that can buffer impacts on the grinding surface and an inner ring that can prevent crushing is provided to improve the above-mentioned problems.

[0014] The present invention is as follows:

[0015] A composite cup-shaped grinding wheel with an outer ring that buffers impact on the grinding surface and an inner ring that prevents crushing, includes a matrix and an annular abrasive layer. The annular abrasive layer is formed by embedding another abrasive entity into a resin-bonded abrasive layer. The other abrasive entity is a metal grinding wheel ring that includes at least a first abrasive entity in the shape of an elongated strip. The other abrasive entity includes abrasive entities in the shape of strips, triangles, ceramics, metals, or organic binders.

[0016] As a preferred embodiment of the present invention, the other abrasive entity comprising a first abrasive entity, a second abrasive entity, a third abrasive entity, and a fourth abrasive entity, wherein the first abrasive entity, the second abrasive entity, the third abrasive entity, and the fourth abrasive entity have different ring widths.

[0017] As a preferred embodiment of the present invention, the width of the first solid ring accounts for 25% to 50% of the total width of the grinding ring.

[0018] As a preferred embodiment of the present invention, the sum of the width of the second solid ring, the width of the third solid ring, and the width of the fourth solid ring accounts for more than 50% of the total width of the grinding ring.

[0019] As a preferred embodiment of the present invention, the first abrasive entity, the second abrasive entity, the third abrasive entity, and the fourth abrasive entity are metal binders with progressively increasing metal mass percentage content and progressively increasing wear resistance and strength.

[0020] As a preferred technical solution of the present invention, the first abrasive body, the second abrasive body, the third abrasive body and the fourth abrasive body are kept flat or slightly raised with respect to the grinding surface or outer diameter of the resin binder, and the protrusion height Ha satisfies: 0≤Ha≤F / N*30%.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] This invention fully utilizes the characteristics and advantages of both resin-bonded and metal-bonded grinding wheels. Through a composite approach of "grinding force + high-strength structure," it resolves the contradiction between grinding force and strength inherent in existing technologies that rely solely on resin-bonded or metal-bonded grinding wheels. This results in a composite grinding wheel with high impact resistance and strong grinding capability in the outer ring, while simultaneously exhibiting high resistance to cracking and wear resistance in the inner ring. It harmonizes the comprehensive grinding performance of two or more abrasive bonding layers, ensuring a smooth grinding surface. The manufacturing process is simple and easy, improving the processing efficiency of ceramic tiles, reducing processing costs, and facilitating the automated manufacturing of composite grinding wheels. Attached Figure Description

[0023] Figure 1 This is a front view of the first structural design of the composite cup-shaped grinding wheel of the present invention;

[0024] Figure 2 This is a front view of the second structure of the composite cup-shaped grinding wheel of the present invention;

[0025] Figure 3 This is a front view of the third structure of the composite cup-shaped grinding wheel of the present invention;

[0026] Figure 4 for Figure 3 Enlarged view of section A in the image;

[0027] Figure 5 This is a stepped cross-sectional view of the normal running-in of the composite cup-shaped grinding wheel of the present invention;

[0028] Figure 6 for Figure 5 A magnified view of a portion at point B;

[0029] Figure 7 This is a stepped cross-sectional view of the overload running-in of the composite cup-shaped grinding wheel of the present invention;

[0030] Figure 8 for Figure 7 A magnified view of a portion of point C.

[0031] The image shows:

[0032] 1. Matrix; 2. Resin binder; 3. Metal abrasive ring; 4. Workpiece; M1, First abrasive body; M2, Second abrasive body; M3, Third abrasive body; M4, Fourth abrasive body; T1, Width of the first abrasive ring; T2, Width of the second abrasive ring; T3, Width of the third abrasive ring; T4, Width of the fourth abrasive ring; β, Running-in angle; h, Normal running-in height; h1, Transition running-in height. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0034] Therefore, the following detailed description of embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely illustrates some embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0035] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0036] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0037] For ease of understanding, the following is based on... Figure 1-8 Specific embodiments are listed to further describe the present invention.

[0038] I. Outer ring buffer grinding surface structure

[0039] A composite cup-shaped grinding wheel with an outer ring for buffering impact on the grinding surface and an inner ring for preventing crushing is disclosed. A high-grinding-force formulation is selected as the main formulation of the resin-bonded cup-shaped grinding wheel to maximize the reduction of machining volume exceeding the grinding angle to the outer diameter of the grinding wheel (i.e., h1) through grinding capacity. Several radially evenly distributed metal-bonded first abrasive entities M1, numbered N, are embedded. The strength of these first abrasive entities M1 is higher than the strength of the resin-bonded abrasive layer 2, constructing a buffer structure to constrain the impact of the ceramic tile on the outer diameter portion of the resin-bonded grinding wheel. Specifically, the strength of the metal-bonded first abrasive entities M1 supports the impact of the ceramic tile machining volume exceeding the grinding angle to the outer diameter of the grinding wheel on the resin-bonded grinding wheel. Simultaneously, the high grinding capacity of the resin-bonded grinding wheel combined with the auxiliary grinding capacity of the first abrasive entities M1 jointly reduces the machining volume exceeding the grinding angle to the outer diameter of the grinding wheel, achieving buffered impact grinding. The function of the surface; the buffer structure ring width T1 is set from the outer radial direction to the inner diameter, and must cover the outer diameter part, occupying 25-50% of the grinding ring width; the first abrasive entity M1 must cover the outer diameter of the abrasive ring, axially penetrate the entire resin-bonded abrasive layer, and the radial coverage width is less than or equal to the grinding ring width; the wear rate of the first abrasive entity M1 in the ring width T1 range is slightly lower than the wear rate of the resin diamond abrasive layer, and it is kept flat or slightly raised with the grinding surface (or outer diameter) of the resin-bonded abrasive layer. The protrusion height Ha satisfies: 0≤Ha≤F / N*30%, where F is the feed per revolution and N is the number of first abrasive entities M1, to ensure that the resin-bonded abrasive layer is the main grinding body; the small protrusion Ha is conducive to the rapid discharge of powder and debris, reduces frictional heat, and alleviates or avoids the phenomenon of reduced product yield caused by burning, chipping, corner breaking, cracking, and shattering of ceramic tiles.

[0040] Within the T1 ring width range, the ratio of the cumulative circumferential arc length of the abrasive entity A at each radial point from the outer radial to the inner diameter to the circumference of that point gradually increases, harmonizing the comprehensive grinding performance of the two bonded abrasive layers to ensure a smooth transition state of the grinding surface.

[0041] II. Inner Ring Anti-Crack Structure

[0042] The area (T2+T3+T4) occupies more than 50% of the grinding ring width; the second abrasive entity M2 is preferably triangular in shape, forming an effect of gradually increasing the ring width from the large radial direction to the small diameter direction, that is, the circumferential accumulation of the second abrasive entity M2 at each radial point from the large radial direction to the small diameter direction gradually increases, harmonizing the comprehensive grinding performance of the three bonded abrasive layers, and realizing the effect of gradually improving wear resistance and strength from the large radial direction to the small diameter direction; the formula of the second abrasive entity M2 adopts a formula with wear resistance greater than or equal to that of the first abrasive entity M1, realizing the transition from T1 with resin bonded abrasive layer as the grinding body to (T2+T3+T4) with metal bonded abrasive entity as the grinding body. Its optimal effect is that the grinding surface height of the resin bonded abrasive layer is close to the grinding surface height of the abrasive entity, so as to reduce vibration during grinding and ensure that the ceramic tile is not easily cracked and has low surface roughness.

[0043] Similarly, for ceramic tiles with high processing strength or hardness, to prevent damage (such as cracking) to the inner ring of the grinding ring caused by exploding fragments, several third abrasive entities M3 can be reinforced and implanted in the inner ring of the resin-bonded abrasive layer. The total ring width of the third abrasive entity M3 is (T3+T4). The formula of the third abrasive entity M3 adopts a formula with wear resistance greater than or equal to that of the second abrasive entity M2. The third abrasive entity M3 is preferably triangular in shape, which forms the effect of gradually increasing the ring width from the large radial direction to the small diameter direction. This harmonizes the comprehensive grinding performance of the four bonded abrasive layers. That is, the circumferential accumulation of the third abrasive entity M3 at each point in the radial direction from the large radial direction to the small diameter direction gradually increases, so as to achieve the effect of gradually improving wear resistance and strength from the large radial direction to the small diameter direction.

[0044] Similarly, further optimization can be achieved by repeatedly reinforcing the inner ring of the resin-bonded abrasive layer with several fourth abrasive entities M4. The ring width of the fourth abrasive entity M4 is T4, and the formulation of the fourth abrasive entity M4 adopts a formula with wear resistance greater than or equal to that of the third abrasive entity M3. The fourth abrasive entity M4 is preferably triangular in shape, which creates the effect of gradually increasing the ring width from the large radial direction to the small diameter direction. This harmonizes the comprehensive grinding performance of the five bonded abrasive layers, that is, the circumferential accumulation of the fourth abrasive entity M4 gradually increases from the large radial direction to the small diameter direction, thereby achieving the effect of gradually improving wear resistance and strength from the large radial direction to the small diameter direction.

[0045] This allows for the creation of a composite grinding wheel with an outer ring that buffers impacts on the grinding surface and an inner ring that prevents crushing. For example... Figure 3-6As shown, under normal grinding conditions, within the grinding angle β range, the contact depth h between the edge of the ceramic workpiece 4 and the edge of the grinding wheel is such that, due to the full-diameter grinding surface coverage of the first abrasive entity M1, the outer ring of the first abrasive entity M1 can buffer the impact of the ceramic workpiece 4 on the grinding surface. Under overload grinding conditions, the total contact depth between the edge of the ceramic workpiece 4 and the edge of the grinding wheel is the sum of the contact depth h of normal grinding and the contact depth h1 of overload grinding. At this time, due to the full-diameter grinding surface coverage of the first abrasive entity M1, the outer ring of the first abrasive entity M1 can also buffer the impact of the ceramic workpiece 4 on the grinding surface, preventing the contact depth h1 of overload grinding from deepening and changing.

[0046] III. Test Plan

[0047] The resin binder is formulated according to the following mass percentage (mt%):

[0048] Basic R scheme: 30% bismaleimide, 60% SiC W2O, 10% MoS2, total 100% mt.

[0049] The above-mentioned proportions of bismaleimide polyimide resin powder and additives are added into a high-speed rotary feeder for mixing. After mixing, the mixture is pressed at 230℃ with a resin diamond concentration of C50 and 170#.

[0050] The first abrasive entity M1 feedstock formulation: alloy powder + graphite 5mt%, by mass percentage.

[0051] The second abrasive entity M2 formulation is: alloy powder + graphite 4mt%, by mass percentage.

[0052] The third abrasive entity M3 formulation: alloy powder + graphite 3mt%, by mass percentage.

[0053] The first four abrasive solid M4 feedstock formulation: alloy powder + graphite 2mt%, by mass percentage.

[0054] The lower the graphite content and the higher the metal content, the more durable and better it retains its shape.

[0055] The grinding wheel is prepared according to the above ingredients, and its structure is as follows: Figure 1-6 As shown.

[0056] A composite cup-shaped grinding wheel with an outer ring that can buffer impact on the grinding surface and an inner ring that can prevent crushing includes a base 1 and an annular abrasive layer. The annular abrasive layer is formed by embedding another abrasive entity with a resin binder 2 into the abrasive layer. The embodiment of the present invention uses a metal binder as an example, and other ceramic binders or organic binders are similar. The other abrasive entity is a metal grinding wheel ring 3 that includes at least a first abrasive entity M1 in the shape of a strip. The other abrasive entity includes abrasive entities of ceramic, metal, or organic binder in the shape of strips or triangles.

[0057] Another bonding abrasive entity includes a first abrasive entity M1, a second abrasive entity M2, a third abrasive entity M3, and a fourth abrasive entity M4, wherein the first abrasive entity M1, the second abrasive entity M2, the third abrasive entity M3, and the fourth abrasive entity M4 have different ring widths.

[0058] The width of the first solid ring (T1) accounts for 25% to 50% of the total width of the grinding ring, and the sum of the widths of the second solid ring (T2), the third solid ring (T3), and the fourth solid ring (T4) accounts for more than 50% of the total width of the grinding ring.

[0059] The first abrasive entity M1, the second abrasive entity M2, the third abrasive entity M3, and the fourth abrasive entity M4 are metal binders with progressively increasing metal mass percentages and progressively increasing wear resistance and strength.

[0060] The first abrasive entity M1, the second abrasive entity M2, the third abrasive entity M3, and the fourth abrasive entity M4 are kept flush with or slightly raised above the grinding surface or outer diameter of the resin binder 2. The protrusion height Ha satisfies: 0≤Ha≤F / N*30%, where F is the feed per revolution to ensure that the resin binder abrasive layer is the main grinding component, and N is the number of the first abrasive entities M1. The small protrusion Ha facilitates rapid discharge of dust and reduces frictional heat, alleviating or preventing the ceramic tiles from suffering burns, chipping, corner breakage, cracks, and shattering, which can lead to a decrease in product yield.

[0061] The grinding wheel of the aforementioned test scheme was used to grind the edge of an actual ceramic workpiece 4, and the test results are shown in the table below.

[0062] Table 1. Statistical Table of Abrasive Solid Comparison Tests

[0063]

[0064] The ring width comparison test and corresponding results of the first abrasive entity M1, the second abrasive entity M2, the third abrasive entity M3 and the fourth abrasive entity M4 are shown in Table 2.

[0065] Table 2. Detailed list of abrasive solid ring width comparison test results

[0066]

[0067] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described herein. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present invention, and all technical solutions and improvements that do not depart from the spirit and scope of the invention, are covered within the scope of the claims of the present invention.

Claims

1. A composite cup-shaped grinding wheel with an outer ring that buffers impact on the grinding surface and an inner ring that prevents crushing, characterized in that, The abrasive wheel includes a matrix (1) and an annular abrasive layer. The annular abrasive layer is formed by embedding another abrasive entity with a resin binder (2) into the abrasive layer. The other abrasive entity is a metal grinding wheel ring (3) that includes at least a first abrasive entity (M1) in the shape of a strip. The other abrasive entity also includes abrasive entities with metal binders in the shape of strips and triangles. The other abrasive entity includes a first abrasive entity (M1), a second abrasive entity (M2), a third abrasive entity (M3), and a fourth abrasive entity (M4). The ring widths of the first abrasive entity (M1), the second abrasive entity (M2), the third abrasive entity (M3), and the fourth abrasive entity (M4) are different. The ring widths of the first abrasive entity (M1), the second abrasive entity (M2), the third abrasive entity (M3), and the fourth abrasive entity (M4) gradually decrease. The ring widths of the first abrasive entity (M1), the second abrasive entity (M2), the third abrasive entity (M3), and the fourth abrasive entity (M4) are... 4) Arranged from the radial direction to the major diameter direction.

2. The composite cup-shaped grinding wheel with an outer ring that buffers impact on the grinding surface and an inner ring that prevents crushing, as described in claim 1, is characterized in that... The ring width of the first abrasive body (M1) is equal to the ring width of the first body T1 + the ring width of the second body T2 + the ring width of the third body T3 + the ring width of the fourth body T4. The ring width of the second abrasive body (M2) is equal to the ring width of the second body T2 + the ring width of the third body T3 + the ring width of the fourth body T4. The ring width of the third abrasive body (M3) is equal to the ring width of the third body T3 + the ring width of the fourth body T4. The ring width of the fourth abrasive body (M4) is equal to the ring width of the fourth body T4. The ring width of the first body T1 accounts for 25% to 50% of the total width of the grinding ring.

3. The composite cup-shaped grinding wheel with an outer ring that buffers impact on the grinding surface and an inner ring that prevents crushing, as described in claim 2, is characterized in that... The sum of the widths of the second solid ring T2, the third solid ring T3, and the fourth solid ring T4 accounts for more than 50% of the total width of the grinding ring.

4. The composite cup-shaped grinding wheel with an outer ring that can buffer impact on the grinding surface and an inner ring that can prevent crushing, as described in claim 3, is characterized in that... The first abrasive entity (M1), the second abrasive entity (M2), the third abrasive entity (M3), and the fourth abrasive entity (M4) are metal binders with progressively increasing metal mass percentage content and successively increasing wear resistance and strength.

5. The composite cup-shaped grinding wheel with an outer ring that buffers impact on the grinding surface and an inner ring that prevents crushing, as described in claim 4, is characterized in that... The first abrasive body (M1), the second abrasive body (M2), the third abrasive body (M3) and the fourth abrasive body (M4) remain flush with the outer diameter of the grinding surface of the resin binder (2).

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