Resin cup grinding wheel capable of reducing scratching rate

Abstract

A resin cup grinding wheel capable of reducing scratching rate, comprising: a plurality of grinding members (1), an auxiliary securing member (2), an outer ring (3), and a base body (4). The grinding members are fixed to the base body by means of the auxiliary securing member, the plurality of grinding members are arranged circumferentially to form a ring-shaped structure, the outer ring is of a ring-shaped structure fitted over the grinding members, and the outer-diametral surface of the ring-shaped structure formed by the grinding members abuts against the inner-diametral surface of the outer ring. Each grinding member consists of a working layer (11) and two functional layers (12), wherein the two functional layers are arranged at two circumferential ends of the working layer in a one-to-one correspondence manner. Two functional layers at the ends of two adjacent grinding members close to each other abut against each other. A plurality of water passing grooves (121) are formed in the functional layers, wherein the water passing grooves are groove-shaped structures passing through the functional layers in the radial direction. The working layer is formed by mixing and curing a high-hardness resin binder and diamond abrasive grains, and each functional layer is formed by curing a low-hardness resin binder. The grinding wheel having the described structure facilitates reduction of the possibility of damage to a ground surface of a workpiece after the diamond abrasive grains fall off.

Description

Resin cup-shaped grinding wheel with reduced scratch rate TECHNICAL FIELD

[0001] The present application relates to the field of grinding processing, in particular to a resin cup-shaped grinding wheel with reduced scratch rate. BACKGROUND

[0002] The prior art diamond resin cup-shaped grinding wheel is fixed by resin binder, and the diamond abrasive grains are higher than the binder to form a certain protruding height. The existence of the height can realize chip containing and water carrying functions, thereby ensuring the normal grinding processing of the workpiece. In the working process of the diamond grinding wheel, the diamond abrasive grains on the working surface of the grinding wheel will fall off and form self-sharpening due to the increase of force caused by the wear and passivation of the blade angle of the diamond abrasive grains and the decrease of the holding force of the diamond abrasive grains caused by the wear of the binder. In the feeding state of the grinding wheel, the fallen diamond abrasive grains will be stuck, rolled or slipped between the binder surface of the grinding wheel and the workpiece in a state higher than the protruding height of the diamond, and then separated from the grinding wheel. In this process, the grinding surface of the workpiece will be scratched, the surface roughness of the workpiece grinding surface will be increased, thereby leading to the decrease of product quality and even unqualified products.

[0003] By reducing the particle size of the diamond abrasive grains, the problem can be alleviated, but it will affect the sharpness of the grinding wheel, which is not conducive to high linear speed, high precision and high efficiency grinding processing, and higher requirements for the precision of the grinding equipment are put forward. By reducing the hardness of the binder or manufacturing dense holes in the binder, the problem can also be alleviated, but it will affect the strength, service life and shape retention ability of the grinding wheel. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a resin cup-shaped grinding wheel with reduced scratch rate to solve the above problems.

[0005] The technical solution for solving the above technical problem is as follows: a resin cup-shaped grinding wheel with reduced scratch rate, comprising: a plurality of grinding elements, a solidification auxiliary element, an outer ring and a base body, the grinding elements are fixed on the base body through the solidification auxiliary element, a plurality of the grinding elements are arranged in a ring structure, the outer ring is a ring structure sleeved on the grinding elements, and the outer diameter of the grinding elements abuts against the inner diameter of the outer ring; the grinding element is composed of a working layer and two functional layers, the two functional layers are arranged at the circumferential two ends of the working layer one by one, the two functional layers at the mutually close ends of the adjacent two grinding elements abut against each other, a plurality of water channels are arranged in the functional layer, the water channel is a groove-shaped structure penetrating the functional layer in the radial direction, the working layer is formed by mixing and solidifying high-hardness resin binder and diamond abrasive grains, and the functional layer is formed by solidifying low-hardness resin binder.

[0006] The beneficial effects of the present application are that after the diamond abrasive grains fall off from the working layer, they are beneficial to quickly sink into the functional layer with relatively low hardness in the direction of the rotation of the grinding wheel, and then enter the water channel, which is discharged under the action of the centrifugal force generated by the rotation of the grinding wheel and the cooling water; the hardness of the functional layer is lower than that of the working layer, which is beneficial to make the wear rate of the functional layer greater than that of the working layer during the grinding process, so that the surface of the functional layer is lower than that of the working layer, and then when the diamond abrasive grains move to the functional layer during the falling process, the height will be lower than that when they move on the surface of the working layer, reducing the possibility of damage to the workpiece grinding surface by the diamond abrasive grains after falling; the convex structure formed by the water channel on the functional layer is also beneficial to support the adjacent grinding piece; the outer ring can close the outer diameter end of the water channel below the surface of the working layer, avoiding unnecessary leakage of cooling water, and improving the utilization rate of cooling water.

[0007] On the basis of the above technical scheme, the present application can also be improved as follows.

[0008] Further, in the two functional layers of the grinding piece, the plurality of water channels on the two functional layers are alternately arranged in the axial direction.

[0009] The beneficial effects of the above further scheme are that the plurality of water channels on the two functional layers are alternately arranged in the axial direction, which is beneficial to ensure that there is always a water channel to continuously supply water at different heights during the axial consumption process of the grinding wheel, and multiple grinding pieces are beneficial to act on the entire ring width of the grinding wheel, optimizing the discharge path of the diamond abrasive grains and reducing the scratching of the workpiece.

[0010] Further, the axial section of the water channel is dovetail-shaped.

[0011] The beneficial effects of the above further scheme are that the dovetail-shaped water channel is beneficial to prevent the two mutually abutting functional layers from being clamped.

[0012] Further, in the two adjacent grinding pieces, the plurality of water channels on the two functional layers close to each other at one end are alternately arranged in the axial direction.

[0013] The beneficial effects of the above further scheme are that it is beneficial to ensure that there is always a water channel to continuously supply water at different heights during the axial consumption process of the grinding wheel, and multiple grinding pieces are beneficial to act on the entire ring width of the grinding wheel, optimizing the discharge path of the diamond abrasive grains and reducing the scratching of the workpiece.

[0014] Further, the water channel is inclined, and the included angle between the water channel and the horizontal direction is between-25 degrees and 25 degrees.

[0015] The beneficial effects of the above further scheme are that the inclined arrangement of the water channel is beneficial to prevent the two mutually abutting functional layers from being clamped.

[0016] Further, the thickness of the working layer in the circumferential direction is greater than or equal to the diamond abrasive grain size.

[0017] The beneficial effect of the above further solution is that it is beneficial to reduce the displacement distance of the fallen diamond abrasive grains from the working layer into the functional layer by reducing the thickness of the working layer, thereby reducing the possibility of the fallen diamond abrasive grains scratching the workpiece.

[0018] Further, the thickness of the functional layer in the circumferential direction is greater than twice the diamond abrasive grain size.

[0019] The beneficial effect of the above further solution is that it is beneficial to enhance the strength of the grinding piece by increasing the thickness of the functional layer, thereby reducing the possibility of the fallen diamond abrasive grains scratching the workpiece.

[0020] Further, the depth of the water passage is greater than the diamond abrasive grain size.

[0021] The beneficial effect of the above further solution is that it is beneficial to enhance the cooling and chip removal effects by increasing the depth of the water passage, thereby reducing the possibility of the fallen diamond abrasive grains scratching the workpiece.

[0022] Further, the wear rate of the outer ring and the wear rate of the functional layer are both greater than the wear rate of the working layer.

[0023] The beneficial effect of the above further solution is that the wear rate of the outer ring being greater than the wear rate of the working layer is beneficial to avoid the outer ring interfering with the working of the grinding piece, and the wear rate of the functional layer being greater than the wear rate of the working layer is beneficial to make the surface of the functional layer lower than the surface of the working layer when the grinding piece is working, thereby reducing the possibility of the fallen diamond abrasive grains damaging the workpiece grinding surface after falling. BRIEF DESCRIPTION OF DRAWINGS

[0024] Fig. 1 is a schematic diagram of the overall structure according to an embodiment of the present application;

[0025] Fig. 2 is a sectional view according to an embodiment of the present application;

[0026] Fig. 3 is a schematic diagram of the arrangement of the grinding pieces in the outer ring according to an embodiment of the present application;

[0027] Fig. 4 is an enlarged schematic diagram of region E in Fig. 3;

[0028] Fig. 5 is a front view of two adjacent grinding pieces according to an embodiment of the present application;

[0029] Fig. 6 is a top view of a grinding piece according to an embodiment of the present application;

[0030] Fig. 7 is a front view of the grinding member according to the first embodiment of the present application;

[0031] Fig. 8 is a structural schematic view of two adjacent grinding members according to the second embodiment of the present application;

[0032] Fig. 9 is a front view of the two adjacent grinding members according to the second embodiment of the present application;

[0033] Fig. 10 is a structural schematic view of two adjacent grinding members according to the third embodiment of the present application;

[0034] Fig. 11 is a front view of the two adjacent grinding members according to the third embodiment of the present application;

[0035] Fig. 12 is a structural schematic view of two adjacent grinding members according to the fourth embodiment of the present application;

[0036] Fig. 13 is a front view of the two adjacent grinding members according to the fourth embodiment of the present application;

[0037] Fig. 14 is a working schematic view of the grinding wheel.

[0038] In Fig. 6, H represents the thickness of the working layer 11 in the circumferential direction, h represents the thickness of the functional layer 12 in the circumferential direction, δ in Fig. 7 represents the depth of the water channel 121, the arc-shaped arrow in Fig. 14 represents the rotating direction of the grinding wheel, the straight arrow represents the displacement direction of the workpiece, and the long strip-shaped component in Fig. 14 represents the workpiece.

[0039] In the drawings, the components represented by the respective reference numerals are listed as follows: 1, grinding member; 2, consolidation auxiliary member; 3, outer ring; 4, base body; 11, working layer; 12, functional layer; 121, water channel. DETAILED DESCRIPTION

[0040] The principles and features of the present application are described below, and the examples are only used to explain the present application and not to limit the scope of the present application.

[0041] As shown in FIG. 1 to FIG. 14, a resin cup-shaped grinding wheel with low scratch rate comprises a plurality of grinding elements 1, a consolidation auxiliary element 2, an outer ring 3 and a base body 4, the grinding elements 1 are fixed on the base body 4 through the consolidation auxiliary element 2, a plurality of the grinding elements 1 are arranged in a ring structure, the outer ring 3 is a ring structure sleeved on the grinding elements 1, and the outer diameter of the grinding elements 1 abuts against the inner diameter of the outer ring 3; the grinding elements 1 are composed of a working layer 11 and two functional layers 12, and the two functional layers 12 are arranged at the circumferential two ends of the working layer 11 one by one, in adjacent two grinding elements 1, the two functional layers 12 at the ends close to each other abut against each other, a plurality of water passing grooves 121 are arranged in the functional layer 12, the water passing groove 121 is a groove structure penetrating the functional layer 12 in the radial direction, the working layer 11 is formed by mixing and curing high-hardness resin bond and diamond abrasive particles, and the functional layer 12 is formed by curing low-hardness resin bond.

[0042] It should be noted that, in the preferred embodiment of the present application, a plurality of the grinding elements 1 are arranged in a circular ring structure, so that the grinding elements 1 have an outer diameter abutting against the inner diameter of the outer ring 3, and the ring structure formed by the plurality of the grinding elements 1 is a grinding ring;

[0043] Preferably, the outer diameter end of the water passing groove 121 is in a closed state (the radial ring width is less than 1 mm), so that the cooling water cannot be wastedly leaked, the structure can be simplified to cancel the outer ring 3, and the cost is reduced;

[0044] Preferably, a soft adhesive tape with certain strength is wound on the outer circumferential surface of the ring structure formed by the plurality of the grinding elements 1 to be glued, so that the outer diameter end of the water passing groove 121 below the working surface is closed to prevent the cooling water from being wastedly leaked, and the structure can be simplified to cancel the outer ring 3, and the cost is reduced;

[0045] The high-hardness resin bond and the low-hardness resin bond are relative concepts, that is, the hardness of the resin bond constituting the working layer 11 is higher than the hardness of the resin bond constituting the functional layer 12;

[0046] The technical mechanism of the present application is as follows: firstly, the circumferential thickness of the working layer 11 on the grinding element 1 is as thin as possible according to the higher quality requirement, so that the path of the detached diamond abrasive grains moving to the functional layer 12 on the surface of the working layer 11 is greatly shortened, thereby making the required time extremely short, the feeding amount of the grinding wheel in this process is extremely small, and the possibility of scratches caused by the detached diamond abrasive grains is greatly reduced; then, the diamond abrasive grains entering the functional layer 12 are easily extruded and sunk into the functional layer due to the low hardness of the binder of the functional layer 12, at this time, the exposed height of the diamond abrasive grains is lower than the exposed height of the diamond abrasive grains on the working layer 11, and then the diamond abrasive grains enter the water channel 121, the possibility of scratches caused by the detached diamond abrasive grains is further reduced; the diamond abrasive grains leave the grinding wheel under the action of centrifugal force and the auxiliary action of cooling water.

[0047] Secondly, the working layer 11 adopts a high holding force and a binder with a higher hardness than the functional layer 12 (i.e. the hardness of the binder of the functional layer 12 is softer than that of the working layer 11), then the wear rate of the surface of the functional layer 12 without diamond abrasive grains and softer than the working layer 11 will be higher than that of the surface of the working layer 11, i.e. the surface of the functional layer 12 is lower than that of the working layer 11, in this case, the height of the diamond abrasive grains moving to the functional layer 12 during the detachment process will be lower than that on the surface of the working layer 11, thereby reducing the scratches of the workpiece by the diamond abrasive grains; then, the diamond abrasive grains leave the grinding wheel under the action of centrifugal force and the auxiliary action of cooling water when they rotate away from the workpiece;

[0048] The working layer 11 adopts a high holding force and a high hardness binder, which improves the utilization rate of diamond abrasive grains, on the one hand, it is beneficial to the thinning of the working layer 11, and on the other hand, the overall grinding wheel can adopt a relatively low diamond concentration, which is beneficial to improve the sharpness of the grinding wheel and reduce the working load; the functional layer 12 adopts a relatively softer binder, which is beneficial to the sinking of diamond abrasive grains into the functional layer 12 and the faster wear of the working layer 11 to reduce the exposed height of the diamond abrasive grains moving to the functional layer 12.

[0049] The beneficial effects of the present application are that after the diamond abrasive grains fall off from the working layer, they are beneficial to quickly sink into the functional layer with relatively low hardness in the direction of the rotation of the grinding wheel, and then enter the water channel, which is discharged under the action of the centrifugal force generated by the rotation of the grinding wheel and the cooling water; the hardness of the functional layer is lower than that of the working layer, which is beneficial to make the wear rate of the functional layer greater than that of the working layer during the grinding process, so that the surface of the functional layer is lower than that of the working layer, and then when the diamond abrasive grains move to the functional layer during the detachment process, the height will be lower than when they move on the surface of the working layer, reducing the possibility of damage to the workpiece grinding surface by the diamond abrasive grains after falling off; the convex structure formed by the water channel on the functional layer is also beneficial to support the adjacent grinding piece; the outer ring can close the outer diameter end of the water channel below the surface of the working layer, avoiding unnecessary leakage of cooling water, and improving the utilization rate of cooling water.

[0050] Preferably, as shown in Figure 5, in the two functional layers 12 of the grinding piece 1, the plurality of water channels 121 on the two functional layers 12 are alternately arranged in the axial direction.

[0051] It should be noted that, as shown in Figure 5, "the plurality of water channels 121 on the two functional layers 12 are alternately arranged in the axial direction" means that the spacing between the two adjacent water channels 121 on one functional layer 12 corresponds to one water channel 121 on the other functional layer 12, so that in the axial direction, as the functional layer 12 is continuously worn, the plurality of water channels 12 at both ends of the working layer 11 will be alternately exposed on the grinding surface.

[0052] The beneficial effects of the above preferred scheme are that the plurality of water channels on the two functional layers are alternately arranged in the axial direction, which is beneficial to ensure that the grinding wheel grinding piece always has a water channel supplying water at different heights during the axial consumption process, and the plurality of grinding pieces are beneficial to act on the entire ring width of the grinding wheel, optimizing the discharge path of the diamond abrasive grains and reducing the scratching of the workpiece.

[0053] Preferably, as shown in Figures 2 to 5, the axial section of the water channel 121 is dovetail-shaped.

[0054] The beneficial effects of the above preferred scheme are that the dovetail-shaped water channel is beneficial to prevent the two mutually abutting functional layers from being clamped.

[0055] Preferably, as shown in Figure 5, in the two adjacent grinding pieces 1, the plurality of water channels 121 on the two functional layers 12 close to each other at one end are alternately arranged in the axial direction.

[0056] It should be noted that, as shown in FIG. 5, the multiple water channels 121 on the two function layers 12 adjacent to each other are alternately arranged in the axial direction, which means that the distance between two adjacent water channels 121 on one of the two function layers 12 is equal to the distance between one water channel 121 on the other function layer 12. Thus, as the function layers 12 are continuously worn, the multiple water channels 121 on the two function layers 12 alternately appear on the grinding surface in the axial direction.

[0057] The above preferred scheme has the beneficial effect of ensuring that the water channels continuously supply water at different heights during the axial consumption of the grinding wheel, and the multiple grinding elements are beneficial to act on the entire ring width of the grinding wheel, optimize the discharge path of the diamond abrasive grains, and reduce the scratching of the workpiece.

[0058] Preferably, as shown in FIGS. 9, 11 and 13, the water channels 121 are arranged obliquely, and the angle between the water channels 121 and the horizontal direction is between -25 degrees and 25 degrees.

[0059] The above preferred scheme has the beneficial effect of preventing the two function layers from being clamped.

[0060] Preferably, as shown in FIG. 6, the thickness H of the working layer 11 in the circumferential direction is greater than or equal to the particle size of the diamond abrasive grains.

[0061] The above preferred scheme has the beneficial effect of reducing the possibility of the falling diamond abrasive grains scratching the workpiece by reducing the displacement distance of the falling diamond abrasive grains from the working layer to the function layer.

[0062] Preferably, as shown in FIG. 6, the thickness h of the function layer 12 in the circumferential direction is greater than twice the particle size of the diamond abrasive grains.

[0063] The above preferred scheme has the beneficial effect of reducing the possibility of the falling diamond abrasive grains scratching the workpiece by increasing the strength of the grinding element through increasing the thickness of the function layer.

[0064] Preferably, as shown in FIG. 7, the depth δ of the water channel 121 is greater than the particle size of the diamond abrasive grains.

[0065] The above preferred scheme has the beneficial effect of reducing the possibility of the falling diamond abrasive grains scratching the workpiece by increasing the cooling and chip removal effects through increasing the depth of the water channel.

[0066] Preferably, the wear rate of the outer ring 3 and the wear rate of the function layer 12 are both greater than the wear rate of the working layer 11.

[0067] The beneficial effect of the above preferred scheme is that the wear rate of the outer ring is greater than the wear rate of the working layer, which helps to avoid the outer ring interfering with the grinding of the workpiece; the wear rate of the functional layer is greater than the wear rate of the working layer, which helps to make the surface of the functional layer lower than the surface of the working layer when the grinding wheel is working, and then when the fallen diamond abrasive particles move to the functional layer, the height will be lower than when they move on the surface of the working layer, reducing the possibility of damage to the workpiece grinding surface by the diamond abrasive particles after falling.

[0068] The technical solutions of the present application will be further described below through four embodiments:

[0069] Embodiment one.

[0070] As shown in FIGS. 1-7, the axial section of the water channel 121 is dovetail-shaped, in two functional layers 12 of one grinding piece 1, the plurality of water channels 121 on the two functional layers 12 are alternately arranged in the axial direction, and in the adjacent two grinding pieces 1, the plurality of water channels 121 on the two functional layers 12 close to each other at one end are alternately arranged in the axial direction.

[0071] Embodiment two.

[0072] As shown in FIGS. 8 and 9, in the adjacent two grinding pieces 1, the water channels 121 at both ends of one grinding piece 1 are horizontally arranged, and the water channels 121 at both ends of the other grinding piece 1 are inclinedly arranged, and in the adjacent two grinding pieces 1, the plurality of water channels 121 on the two functional layers 12 close to each other at one end can be alternately arranged in the axial direction, or can not be alternately arranged.

[0073] Embodiment three.

[0074] As shown in FIGS. 10 and 11, the water channels 121 at both ends of the grinding piece 1 are both inclinedly arranged, and the inclined directions are opposite, and in the adjacent two grinding pieces 1, the plurality of water channels 121 on the two functional layers 12 close to each other at one end can be alternately arranged in the axial direction, or can not be alternately arranged.

[0075] Embodiment four.

[0076] As shown in FIGS. 12 and 13, the water channels 121 at both ends of the grinding piece 1 are both inclinedly arranged, and in the adjacent two grinding pieces 1, the inclined direction of the water channels 121 at both ends of one grinding piece 1 is opposite to the inclined direction of the water channels 121 at both ends of the other grinding piece 1, and the plurality of water channels 121 on the two functional layers 12 close to each other at one end can be alternately arranged in the axial direction, or can not be alternately arranged.

[0077] In the description of the application, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description of the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the application.

[0078] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0079] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0080] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or it can only mean that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or it can only mean that the horizontal height of the first feature is less than that of the second feature.

[0081] In the description of the specification, the description using the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the particular feature, structure, material or characteristic being described is included in at least one embodiment or example of the present application. The illustrative appearances of the above-mentioned terms in various places in the specification are not necessarily referred to the same embodiment or example. Moreover, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Furthermore, the description herein of certain examples does not necessarily exclude these features, structures, materials or characteristics from being used in other examples. Neither can such description imply that these features, structures, materials or characteristics are essential to the practice of the application.

[0082] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be interpreted as limiting the present application, and that variations, modifications, substitutions and changes can be made by those skilled in the art without departing from the scope of the present application.

Claims

1. A resin cup-shaped grinding wheel for reducing the rate of scratch, characterized by, The application relates to a grinding element (1), a consolidation auxiliary element (2), an outer ring (3) and a base body (4), wherein the grinding element (1) is fixed on the base body (4) through the consolidation auxiliary element (2), a plurality of the grinding elements (1) are arranged around to form a ring structure, the outer ring (3) is a ring structure sleeved on the grinding element (1), and the outer diameter of the grinding element (1) abuts against the inner diameter of the outer ring (3). The grinding element (1) is composed of a working layer (11) and two functional layers (12), the two functional layers (12) are arranged at the circumferential two ends of the working layer (11) one by one, in adjacent two grinding elements (1), the two functional layers (12) at the close end abut against each other, a plurality of water passing grooves (121) are arranged in the functional layer (12), the water passing groove (121) is a groove-shaped structure penetrating the functional layer (12) in the radial direction, the working layer (11) is formed by mixing and curing high-hardness resin bond and diamond abrasive particles, and the functional layer (12) is formed by curing low-hardness resin bond. In the two functional layers (12) of the grinding element (1), the plurality of water passing grooves (121) on the two functional layers (12) are alternately arranged in the axial direction.

2. The resin cup-shaped grinding wheel of claim 1, wherein The axial section of the water passing groove (121) is dovetail-shaped.

3. The resin cup-shaped grinding wheel for reducing scratch according to claim 1, wherein In the adjacent two grinding elements (1), the plurality of water passing grooves (121) on the two functional layers (12) at the close end are alternately arranged in the axial direction.

4. The resin cup-shaped grinding wheel of claim 3, wherein The water passing groove (121) is arranged obliquely, and the included angle between the water passing groove (121) and the horizontal direction is between -25 degrees and 25 degrees.

5. The resin cup-shaped grinding wheel of claim 1, wherein The thickness of the working layer (11) in the circumferential direction is greater than or equal to the particle size of the diamond abrasive particles.

6. The resin cup-shaped grinding wheel of claim 1, wherein The thickness of the functional layer (12) in the circumferential direction is greater than twice the particle size of the diamond abrasive particles.

7. The resin cup-shaped grinding wheel of claim 1, wherein The depth of the water passing groove (121) is greater than the particle size of the diamond abrasive particles.

8. The resin cup-shaped grinding wheel of claim 1, wherein The wear rate of the outer ring (3) and the wear rate of the functional layer (12) are both greater than the wear rate of the working layer (11).

9. The resin cup-shaped grinding wheel of claim 1, wherein ​

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