A flexible grinding wheel with a biomimetic scale self-sharpening structure

Abstract

This invention discloses a flexible grinding wheel with a biomimetic scale self-sharpening structure, comprising a connecting flange, a flexible substrate, a buffer layer, and a biomimetic scale self-sharpening layer. The flexible substrate has a ring-shaped structure, with its outer circumferential surface connected to the biomimetic scale self-sharpening layer via the buffer layer, and its inner circumferential surface fixedly connected to the connecting flange. The connecting flange is used to mate with the spindle of a grinding equipment. The biomimetic scale self-sharpening layer is composed of several biomimetic scale units arranged in a stacked manner. The biomimetic scale units adopt a gradient hardness structure, and abrasive grains are embedded on the surface of each biomimetic scale unit. The advantages of this invention compared to existing technologies are: excellent self-sharpening performance, eliminating the need for frequent dressing; a perfect balance between flexibility and wear resistance; high processing accuracy and good surface quality; stable structure and reliable use; wide applicability and strong practicality.

Description

Technical Field

[0001] This invention relates to the field of flexible grinding wheel technology, specifically to a flexible grinding wheel with a biomimetic scale self-sharpening structure. Background Technology

[0002] Flexible grinding wheels, with their deformability and ability to conform to complex curved surfaces, are widely used in precision machining and grinding of irregularly shaped parts. Their core requirement is to balance flexible conformation with consistent grinding sharpness. Existing flexible grinding wheels mostly employ a structure of an integral flexible base combined with surface abrasive planting, which has two major drawbacks: First, insufficient self-sharpening performance. During grinding, the surface abrasive grains wear down and become dull, unable to spontaneously expose new sharp grains, requiring frequent machine stops for dressing, which not only reduces processing efficiency but also affects processing accuracy. Second, it is difficult to balance wear resistance and flexibility. To ensure flexibility, the base hardness is usually reduced, resulting in insufficient abrasive grain retention, easy abrasive grain detachment, and shortened wheel life. Conversely, improving wear resistance sacrifices flexibility, making it unsuitable for the conformal grinding requirements of complex curved surfaces.

[0003] Currently, some biomimetic abrasive technologies exist, such as applying biomimetic coatings to plowshares to achieve self-sharpening effects, or applying flexible structures to grinding wheels to improve fit. However, there is no integrated technical solution that combines biomimetic scale structures with flexible grinding wheels to achieve "flexible fit - self-sharpening and wear resistance - continuous grinding." Existing technologies either focus only on flexible adjustment while neglecting self-sharpening performance, or only focus on self-sharpening without sufficient flexibility, failing to meet the dual requirements of "flexible adaptation + continuous sharpness" for grinding wheels in the precision machining of complex curved surfaces. Therefore, designing a grinding wheel that combines a biomimetic scale self-sharpening structure with high flexibility is key to solving the pain points of existing technologies. Summary of the Invention

[0004] To address the shortcomings mentioned in the background art, this invention provides a flexible grinding wheel with a biomimetic scale self-sharpening structure.

[0005] To solve the above-mentioned technical problems, the technical solution provided by the present invention is as follows: a flexible grinding wheel with a biomimetic scale self-sharpening structure, comprising a connecting flange, a flexible substrate, a buffer layer and a biomimetic scale self-sharpening layer, wherein the flexible substrate is an annular structure, its outer circumferential surface is connected to the biomimetic scale self-sharpening layer through the buffer layer, and its inner circumferential surface is fixedly connected to the connecting flange, wherein the connecting flange is used to cooperate with the spindle of the grinding equipment.

[0006] The biomimetic scale self-sharpening layer is composed of several biomimetic scale units arranged in a stacked manner. The biomimetic scale units adopt a gradient hardness structure, and abrasive grains are embedded on the surface of the biomimetic scale units.

[0007] Furthermore, the flexible substrate is made of silicone rubber and aramid fiber composite, with a Shore hardness of 30-50HA and a thickness of 5-15mm.

[0008] The flexible substrate has several uniformly distributed elastic through holes inside, with a diameter of 1-3 mm and a spacing of 5-8 mm between adjacent elastic through holes.

[0009] Furthermore, the buffer layer is made of polyurethane elastomer with a thickness of 1-3 mm. The buffer layer, flexible substrate, and biomimetic scale self-sharpening layer are all bonded with high-temperature resistant adhesive with a bonding strength of not less than 1.5 MPa.

[0010] Furthermore, the biomimetic scale unit is a sheet-like structure with a length of 8-15mm, a width of 5-10mm, and a thickness of 0.8-2mm. The staggered overlapping structure of adjacent biomimetic scale units imitates the arrangement of snake scales.

[0011] Furthermore, the gradient hardness structure of the biomimetic scale unit is specifically such that the hardness gradually increases from the inner side near the buffer layer to the outer side away from the buffer layer, with the inner side having a hardness of HV300-400 and the outer side having a hardness of HV600-800.

[0012] Furthermore, the biomimetic scale unit is prepared using powder metallurgy technology. The raw materials include iron powder, copper powder, tin powder, tungsten carbide powder, and graphite powder. The mass percentages of each raw material are: 40-50% iron powder, 25-35% copper powder, 5-10% tin powder, 8-15% tungsten carbide powder, and 1-3% graphite powder. The raw materials are mixed, pressed, and sintered at a temperature of 850-950℃ for 2-3 hours.

[0013] Furthermore, the connecting flange is made of 45 steel, its inner diameter is adapted to the main shaft of the grinding equipment, its outer diameter is interference-fitted with the inner circumference of the flexible substrate, and the end face of the connecting flange is provided with a number of evenly distributed fixing holes, the number of fixing holes being 4-8, and the surface of the connecting flange is provided with an anti-rust coating.

[0014] Furthermore, the outer surface of the biomimetic scale unit is provided with an anti-stick coating, which is made of polytetrafluoroethylene material and has a thickness of 0.05-0.1mm.

[0015] With the above structure, the present invention has the following advantages: excellent self-sharpening performance, no need for frequent dressing: the biomimetic scale unit adopts a gradient hardness structure, which imitates the wear-resistant and self-sharpening characteristics of biological scales. During the grinding process, new abrasive grains can be exposed autonomously through self-wearing, so as to achieve continuous self-sharpening. This completely solves the problem that existing flexible grinding wheels need to stop the machine for dressing after the abrasive grains become dull, greatly improves processing efficiency and reduces the labor intensity of operators.

[0016] A perfect balance between flexibility and wear resistance: The flexible matrix is ​​made of silicone rubber and aramid fiber composite, and with the buffer layer, it can achieve good flexible deformation to meet the grinding needs of complex curved surfaces; the biomimetic scale unit is made with gradient hardness design and powder metallurgy process, which has both high wear resistance and certain toughness. It not only ensures the abrasive grain retention force, but also avoids the scale unit from breaking due to deformation, effectively extending the service life of the grinding wheel.

[0017] High machining accuracy and good surface quality: The biomimetic scale units are stacked and arranged, and the force is uniform during grinding. The buffer layer can buffer the impact force and reduce grinding scratches on the workpiece surface. The anti-stick coating can prevent grinding chips from adhering and avoid secondary damage to the machined surface. At the same time, the mesh-like embedding of abrasive grains can improve the flatness and smoothness of the machined surface, meeting the requirements of precision machining.

[0018] Stable structure and reliable use: The biomimetic scale self-sharpening layer is firmly connected to the flexible substrate through a buffer layer and high-temperature resistant adhesive. The connecting flange is interference-fitted with the flexible substrate and further fixed through fixing holes to ensure that the grinding wheel does not loosen or fall off during high-speed rotation. The setting of elastic through holes improves the resilience of the flexible substrate, avoids residual deformation, and ensures processing consistency.

[0019] With a wide range of applications and strong practicality, it can be adapted to the grinding and polishing of various complex curved workpieces such as aerospace blades, irregularly shaped components, and precision instrument parts. Whether it is a metal material or a non-metal material, it can achieve efficient and precise grinding. At the same time, the abrasive grain size and scale unit size can be adjusted according to the processing requirements to adapt to different processing scenarios. Attached Figure Description

[0020] Figure 1 A schematic diagram of the structure of a flexible grinding wheel with a biomimetic scale self-sharpening structure. Figure 1 .

[0021] Figure 2 A schematic diagram of the structure of a flexible grinding wheel with a biomimetic scale self-sharpening structure. Figure 2 .

[0022] Figure 3 This is a top view schematic diagram of a flexible grinding wheel with a biomimetic scale self-sharpening structure.

[0023] Figure 4 This is a front view schematic diagram of a flexible grinding wheel with a biomimetic scale self-sharpening structure.

[0024] Figure 5 yes Figure 4 A schematic diagram of the structure of part A.

[0025] As shown in the figure: 1. Connecting flange; 2. Flexible substrate; 3. Buffer layer; 4. Bionic scale self-sharpening layer; 5. Bionic scale unit. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings.

[0027] Combined with appendix Figure 1-5 A flexible grinding wheel with a biomimetic scale self-sharpening structure includes a flexible substrate, a biomimetic scale self-sharpening layer, a connecting flange, and a buffer layer. The flexible substrate has a ring structure, with its outer circumferential surface connected to the biomimetic scale self-sharpening layer via the buffer layer, and its inner circumferential surface fixedly connected to the connecting flange, which is used to mate with the spindle of a grinding equipment. The biomimetic scale self-sharpening layer is composed of several biomimetic scale units arranged in an alternating overlapping manner. The biomimetic scale units adopt a gradient hardness structure, and their surfaces are embedded with abrasive grains. During the grinding process, the biomimetic scale units can expose new abrasive grains through self-wearing, achieving a self-sharpening effect. At the same time, the alternating overlapping structure can adapt to the deformation of the flexible substrate, ensuring the fit of the grinding wheel to complex curved surfaces.

[0028] The flexible substrate is made of silicone rubber and aramid fiber composite, with a Shore hardness of 30-50HA and a thickness of 5-15mm. The flexible substrate has several uniformly distributed elastic through holes with a diameter of 1-3mm and a spacing of 5-8mm between adjacent elastic through holes. This is used to improve the deformation capacity and resilience of the flexible substrate, ensuring that the grinding wheel can adapt to the complex curved surface and quickly reset after detaching from the workpiece, avoiding residual deformation that may affect the subsequent grinding accuracy.

[0029] The buffer layer is made of polyurethane elastomer with a thickness of 1-3mm. The buffer layer, flexible substrate, and biomimetic scale self-sharpening layer are bonded together with high-temperature resistant adhesive with a bonding strength of not less than 1.5MPa. Its function is to buffer the impact force generated during grinding, reduce grinding scratches on the workpiece surface, and enhance the connection stability between the biomimetic scale self-sharpening layer and the flexible substrate to prevent the scale units from falling off.

[0030] The biomimetic scale unit is a sheet-like structure with a length of 8-15mm, a width of 5-10mm, and a thickness of 0.8-2mm. This staggered overlapping structure imitates the arrangement of snake scales, which can prevent the scale unit from breaking due to deformation when the flexible substrate deforms, while ensuring the uniformity of force during grinding.

[0031] The gradient hardness structure of the biomimetic scale unit is as follows: the hardness gradually increases from the inner side near the buffer layer to the outer side away from the buffer layer. The hardness of the inner side is HV300-400, and the hardness of the outer side is HV600-800. This gradient hardness design draws on the wear-resistant characteristics of biological scales. The lower hardness of the inner side can ensure the adhesion and following of the scale unit to the buffer layer, while the higher hardness of the outer side can improve the wear resistance and abrasive grain retention of the scale unit. At the same time, the scale unit presents a state of "gradual wear from the outside to the inside" during the wear process, autonomously exposing new abrasive grains and achieving continuous self-sharpening.

[0032] The surface of the biomimetic scale unit is provided with abrasive grain embedding grooves. The grooves are uniformly distributed in a mesh structure, with a depth of 0.2-0.5 mm. The abrasive grains are diamond abrasive grains or cubic boron nitride abrasive grains, with a grain size of 100-800 mesh. The abrasive grains are embedded in the grooves by a copper-tin alloy metal binder. The embedding density of the abrasive grains is 50-100 grains / mm. 2 The abrasive grain embedding groove can improve the retention stability of the abrasive grains and prevent them from falling off during the grinding process. At the same time, the mesh distribution can make the abrasive grains bear force evenly during the grinding process, thus improving the flatness of the machined surface.

[0033] The biomimetic scale unit is prepared using powder metallurgy. The raw materials include iron powder, copper powder, tin powder, tungsten carbide powder, and graphite powder. The mass percentages of each raw material are: 40-50% iron powder, 25-35% copper powder, 5-10% tin powder, 8-15% tungsten carbide powder, and 1-3% graphite powder. The raw materials are mixed, pressed, and sintered at a temperature of 850-950℃ for 2-3 hours. This preparation process can precisely control the gradient hardness and structural strength of the scale unit, ensuring that it has both wear resistance and a certain degree of toughness, and is suitable for flexible deformation requirements.

[0034] The connecting flange is made of 45 steel. Its inner diameter is adapted to the spindle of the grinding equipment, and its outer diameter is interference-fitted with the inner circumference of the flexible substrate. The end face of the connecting flange is provided with several evenly distributed fixing holes, with a number of 4-8 holes, which are used to further fix the connecting flange to the flexible substrate and prevent the grinding wheel from loosening during high-speed rotation. The surface of the connecting flange is provided with an anti-rust coating to improve its service life.

[0035] The outer surface of the biomimetic scale self-sharpening layer is provided with an anti-stick coating. The anti-stick coating is made of polytetrafluoroethylene material with a thickness of 0.05-0.1mm. It is used to prevent grinding debris generated during the grinding process from adhering to the surface of the scale unit, so as to avoid the grinding debris affecting the self-sharpening effect and processing accuracy. At the same time, it reduces the frictional resistance during the grinding process and reduces energy consumption.

[0036] In a specific implementation, this invention provides a flexible grinding wheel with a biomimetic scale self-sharpening structure, comprising a flexible substrate 2, a biomimetic scale self-sharpening layer 4, a connecting flange 1, and a buffer layer 3. The flexible substrate 2 is an annular structure, made of a composite of silicone rubber and aramid fiber, with a Shore hardness of 30HA and a thickness of 5mm. It has several uniformly distributed elastic through holes inside, each with a diameter of 1mm and a spacing of 5mm between adjacent elastic through holes. The buffer layer 3 is made of polyurethane elastomer, with a thickness of 1mm, and is bonded to the flexible substrate 2 and the biomimetic scale self-sharpening layer 4 with a high-temperature resistant adhesive, achieving a bonding strength of 1.5MPa. The connecting flange 1 is made of 45# steel, with an inner diameter adapted to the spindle of the grinding equipment and an outer diameter interference fit with the inner circumference of the flexible substrate 2. It has four uniformly distributed fixing holes on its end face and a rust-proof coating on its surface.

[0037] The biomimetic scale self-sharpening layer 4 is composed of several biomimetic scale units 5 arranged in an alternating, overlapping manner. Each biomimetic scale unit 5 has a sheet-like structure, with a length of 8mm, a width of 5mm, and a thickness of 0.8mm. The biomimetic scale unit 5 adopts a gradient hardness structure, with an inner hardness of HV300 and an outer hardness of HV600. The surface of each biomimetic scale unit 5 has abrasive grain embedding grooves. These grooves have a mesh structure and a depth of 0.2mm. The abrasive grains are diamond abrasive grains with a particle size of 100 mesh, embedded in the grooves using a copper-tin alloy binder at a density of 50 grains / mm². 2 The biomimetic scale unit 5 is prepared by powder metallurgy process. The raw material mass percentage is: 40% iron powder, 35% copper powder, 10% tin powder, 13% tungsten carbide powder, and 2% graphite powder. The sintering temperature is 850℃ and the holding time is 2h. The outer surface of the biomimetic scale self-sharpening layer 4 is provided with a polytetrafluoroethylene anti-stick coating with a thickness of 0.05mm. Example 2

[0038] A flexible grinding wheel with a biomimetic scale self-sharpening structure includes a flexible substrate 2, a biomimetic scale self-sharpening layer 4, a connecting flange 1, and a buffer layer 3. The flexible substrate 2 is a ring structure made of silicone rubber and aramid fiber composite, with a Shore hardness of 40HA and a thickness of 10mm. It has several uniformly distributed elastic through holes with a diameter of 2mm and a spacing of 6.5mm between adjacent elastic through holes 5. The buffer layer 3 is made of polyurethane elastomer with a thickness of 2mm and is bonded to the flexible substrate 2 and the biomimetic scale self-sharpening layer 4 with a high-temperature resistant adhesive, with a bonding strength of 1.8MPa. The connecting flange 1 is made of 45# steel, with an inner diameter adapted to the spindle of the grinding equipment and an outer diameter interference fit with the inner circumference of the flexible substrate 2. It has 6 uniformly distributed fixing holes on its end face and a rust-proof coating on its surface.

[0039] The biomimetic scale self-sharpening layer 4 is composed of several biomimetic scale units 5 arranged in an alternating, overlapping manner. Each biomimetic scale unit 5 has a sheet-like structure, a length of 12 mm, a width of 8 mm, and a thickness of 1.4 mm. The biomimetic scale unit 5 adopts a gradient hardness structure, with an inner hardness of HV350 and an outer hardness of HV700. The surface of each biomimetic scale unit 5 has abrasive grain embedding grooves with a mesh structure and a groove depth of 0.35 mm. The abrasive grains are cubic boron nitride abrasive grains with a particle size of 450 mesh, embedded in the abrasive grain embedding grooves using a copper-tin alloy binder, with an embedding density of 75 grains / mm². 2 The biomimetic scale unit 5 is prepared using powder metallurgy. The raw materials are: 45% iron powder, 30% copper powder, 7% tin powder, 15% tungsten carbide powder, and 3% graphite powder. The sintering temperature is 900℃ and the holding time is 2.5h. The outer surface of the biomimetic scale self-sharpening layer 4 is coated with a polytetrafluoroethylene anti-stick coating with a thickness of 0.08mm. Example 3

[0040] A flexible grinding wheel with a biomimetic scale self-sharpening structure includes a flexible substrate 2, a biomimetic scale self-sharpening layer 4, a connecting flange 1, and a buffer layer 3. The flexible substrate 2 is a ring structure made of silicone rubber and aramid fiber composite, with a Shore hardness of 50HA and a thickness of 15mm. It has several uniformly distributed elastic through holes with a diameter of 3mm and a spacing of 8mm between adjacent elastic through holes. The buffer layer 3 is made of polyurethane elastomer with a thickness of 3mm. It is bonded to the flexible substrate 2 and the biomimetic scale self-sharpening layer 4 with a high-temperature resistant adhesive and a bonding strength of 2.0MPa. The connecting flange 1 is made of 45# steel. Its inner diameter is adapted to the spindle of the grinding equipment, and its outer diameter is interference-fitted with the inner circumference of the flexible substrate 2. It has 8 uniformly distributed fixing holes on its end face and a rust-proof coating on its surface.

[0041] The biomimetic scale self-sharpening layer 4 is composed of several biomimetic scale units 5 arranged in an alternating, overlapping manner. Each biomimetic scale unit 5 has a sheet-like structure, a length of 15mm, a width of 10mm, a thickness of 2mm, and an overlapping angle of 30°. The biomimetic scale unit 5 adopts a gradient hardness structure, with an inner hardness of HV400 and an outer hardness of HV800. The surface of each biomimetic scale unit 5 has abrasive grain embedding grooves, which have a mesh-like structure and a groove depth of 0.5mm. The abrasive grains are diamond abrasive grains with a particle size of 800 mesh, embedded in the abrasive grain embedding grooves using a copper-tin alloy binder, with an embedding density of 100 grains / mm². 2 The biomimetic scale unit 5 is prepared by powder metallurgy process. The raw material mass percentage is: 50% iron powder, 25% copper powder, 5% tin powder, 18% tungsten carbide powder, and 2% graphite powder. The sintering temperature is 950℃ and the holding time is 3h. The outer surface of the biomimetic scale self-sharpening layer 4 is provided with a polytetrafluoroethylene anti-stick coating with a thickness of 0.1mm.

[0042] In the three embodiments described above, the gradient hardness structure of the biomimetic scale unit is achieved by adjusting the content of tungsten carbide powder and the sintering process. The higher the content of tungsten carbide powder, the higher the hardness of the outer side; the higher the sintering temperature and the longer the holding time, the higher the structural strength of the scale unit.

[0043] In practical applications, the appropriate abrasive grain size, scale unit size, and flexible matrix hardness can be selected according to the material, hardness, and machining accuracy requirements of the workpiece to achieve the best grinding effect.

[0044] The working principle of this invention: The flexible grinding wheel of this invention is fixed to the main shaft of the grinding equipment via a connecting flange. After the equipment is started, the grinding wheel rotates at high speed, and the biomimetic scale self-sharpening layer contacts the workpiece surface to perform grinding operations. Due to the good deformation capacity of the flexible substrate and the buffer layer's ability to cushion impact forces, the staggered biomimetic scale units can closely conform to the complex curved surface of the workpiece, ensuring comprehensive and uniform grinding. During the grinding process, the high-hardness layer on the outer side of the biomimetic scale unit wears first. As wear progresses, the outer abrasive grains gradually fall off, while the gradient hardness structure of the scale unit gradually exposes the lower-hardness inner part, revealing the new abrasive grains embedded within, achieving self-sharpening without the need for machine stoppage for maintenance. The staggered structure of the biomimetic scale units ensures the connection stability of the scale units and allows for relative sliding during deformation of the flexible substrate, preventing scale unit breakage. Furthermore, the abrasive grain embedding grooves and metal binder effectively prevent abrasive grain detachment, extending the grinding wheel's service life. The anti-stick coating prevents grinding debris adhesion, further ensuring the self-sharpening effect and machining accuracy.

[0045] The present invention and its embodiments have been described above. This description is not restrictive, and the actual structure is not limited thereto. In conclusion, if those skilled in the art, inspired by this description, design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the scope of protection of this invention.

Claims

1. A flexible grinding wheel with a biomimetic scale self-sharpening structure, characterized in that: It includes a connecting flange (1), a flexible substrate (2), a buffer layer (3) and a biomimetic scale self-sharpening layer (4). The flexible substrate has a ring structure. Its outer circumferential surface is connected to the biomimetic scale self-sharpening layer (4) through the buffer layer (3), and its inner circumferential surface is fixedly connected to the connecting flange (1). The connecting flange (1) is used to cooperate with the main shaft of the grinding equipment. The biomimetic scale self-sharpening layer (4) is composed of several biomimetic scale units (5) arranged in a stacked manner. The biomimetic scale unit (5) adopts a gradient hardness structure and abrasive grains are embedded on its surface.

2. The flexible grinding wheel with a biomimetic scale self-sharpening structure according to claim 1, characterized in that: The flexible substrate (2) is made of silicone rubber and aramid fiber composite, with a Shore hardness of 30-50HA and a thickness of 5-15mm; The flexible substrate (2) has several uniformly distributed elastic through holes inside. The diameter of the elastic through holes is 1-3 mm and the spacing between adjacent elastic through holes is 5-8 mm.

3. A flexible grinding wheel with a biomimetic scale self-sharpening structure according to claim 1, characterized in that: The buffer layer is made of polyurethane elastomer with a thickness of 1-3mm. The buffer layer, flexible substrate, and biomimetic scale self-sharpening layer are bonded together with high-temperature resistant adhesive with a bonding strength of not less than 1.5MPa.

4. A flexible grinding wheel with a biomimetic scale self-sharpening structure according to claim 1, characterized in that: The biomimetic scale unit (5) is a sheet-like structure with a length of 8-15 mm, a width of 5-10 mm, and a thickness of 0.8-2 mm. The staggered overlapping structure of adjacent biomimetic scale units (5) imitates the arrangement of snake scales.

5. A flexible grinding wheel with a biomimetic scale self-sharpening structure according to claim 1, characterized in that: The gradient hardness structure of the biomimetic scale unit (4) is as follows: the hardness gradually increases from the inner side near the buffer layer (3) to the outer side away from the buffer layer (3), with the inner hardness being HV300-400 and the outer hardness being HV600-800.

6. A flexible grinding wheel with a biomimetic scale self-sharpening structure according to claim 1, characterized in that: The biomimetic scale unit (5) is prepared by powder metallurgy. The raw materials include iron powder, copper powder, tin powder, tungsten carbide powder and graphite powder. The mass percentage of each raw material is: 40-50% iron powder, 25-35% copper powder, 5-10% tin powder, 8-15% tungsten carbide powder and 1-3% graphite powder. It is made by mixing, pressing and molding and sintering. The sintering temperature is 850-950℃ and the holding time is 2-3h.

7. A flexible grinding wheel with a biomimetic scale self-sharpening structure according to claim 1, characterized in that: The connecting flange (1) is made of No. 45 steel. Its inner diameter is adapted to the main shaft of the grinding equipment, and its outer diameter is interference-fitted with the inner circumference of the flexible substrate (2). The end face of the connecting flange (1) is provided with a number of evenly distributed fixing holes, the number of which is 4-8. The surface of the connecting flange (1) is provided with an anti-rust coating.

8. A flexible grinding wheel with a biomimetic scale self-sharpening structure according to claim 1, characterized in that: The outer surface of the biomimetic scale unit (5) is provided with an anti-stick coating, which is made of polytetrafluoroethylene material and has a thickness of 0.05-0.1mm.

Images