Semi-consolidation abrasive particle magnetic control surface microstructure polishing pad and preparation method

Abstract

The invention belongs to the technical field of polishing, and discloses a semi-consolidation abrasive particle magnetic control surface microstructure polishing pad and a preparation method, the semi-consolidation abrasive particle magnetic control surface microstructure polishing pad comprises a polishing pad body, one side of the polishing pad body is an arc surface, the arc surface is provided with a plurality of spiral grooves and drainage grooves, and the spiral grooves and the drainage grooves are communicated in an arc mode; the other side of the polishing pad is a smooth cambered surface and used for being fixedly connected with the outer surface of a polishing tool, and the top of the smooth cambered surface is an end face. A plurality of spiral grooves are modularly formed in one side of the polishing pad, and the spiral grooves in the polishing pad are communicated with the drainage grooves, so that the flowing property of polishing liquid in a polishing area is improved, and a good cooling and heat dissipation effect is achieved; the modular arrangement of the micro-structures on the surface of the polishing pad aims at enhancing the contact stability in the polishing process, prolonging the service life of the polishing pad, improving the machining efficiency of workpieces and solving the technical problems that an existing polyurethane polishing pad is extremely prone to abrasion and blockage in the workpiece machining process, and consequently material removal is unstable.

Description

Technical Field

[0001] The invention belongs to the technical field of polishing, and relates to a semi-consolidated abrasive magnetically controlled surface microstructure polishing pad and a preparation method thereof. Background Art

[0002] In the process of ultra-precision elastic polishing, in order to obtain better surface quality of the workpiece surface, the "flexible" processing method is used. The use of airbag polishing and small tool polishing can achieve high efficiency, high quality and high precision workpiece service requirements.

[0003] Airbag polishing hoods and small tool polishing can meet the processing requirements of large-size workpieces and free-form surfaces. The end-effector tools are usually hemispherical, have poor flexibility, are easy to wear, and have poor adaptability to complex surfaces.

[0004] In order to prevent hard abrasive particles from damaging the pressurized airbag polishing cover or the inner layer of small polishing tools and causing rapid wear of the tools, the industry generally uses relatively cheap and easily replaceable polyurethane polishing pads. They have the functions of transporting polishing liquid, removing polishing debris and transferring loads, and have a significant impact on the material removal rate and surface processing quality of the workpiece. However, polyurethane polishing pads are very prone to wear and clogging during the workpiece processing process, resulting in unstable material removal and affecting the certainty of material removal. Summary of the invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a semi-consolidated abrasive magnetically controlled surface microstructure polishing pad and a preparation method, so as to solve the technical problem that the existing polyurethane polishing pads in the prior art are very prone to wear and clogging during workpiece processing, resulting in unstable material removal.

[0006] In order to achieve the above object, the present invention adopts the following technical solution: The present invention provides a semi-consolidated abrasive magnetically controlled surface microstructure polishing pad, comprising a polishing pad, wherein one side of the polishing pad is an arc surface, on which a plurality of spiral grooves and drainage grooves are arranged, and the plurality of spiral grooves and drainage grooves are connected in an arc manner; the other side of the polishing pad is a smooth arc surface, which is used for fixed connection with the outer surface of a polishing tool, and the top of the smooth arc surface is an end face; and a plurality of the spiral grooves are modularly installed on one side of the polishing pad.

[0007] Furthermore, the spiral groove (1) is set along the nonlinear implicit function of the Ellipse model iteration; The nonlinear implicit function is: ; in, is the horizontal axis, is the vertical axis, The major diameter of the ellipse, For the elliptical path, , , is a constant.

[0008] Furthermore, the angle between two adjacent spiral groove modules is 5°-10°; and the diameter of the spiral groove decreases continuously from the end face to the other end.

[0009] Furthermore, the plurality of drainage grooves are arranged in concentric circles, and the drainage grooves are perpendicular to the rotation axis of the polishing pad.

[0010] Furthermore, the polishing pad is processed by a 3D printing mold, the 3D printing mold includes an upper mold and a lower mold, and the polishing pad is arranged between the upper mold and the lower mold.

[0011] Furthermore, evenly distributed semi-consolidated abrasive prefabricated holes are provided on the inner surface of the lower mold.

[0012] The present invention also provides a method for preparing a semi-consolidated abrasive magnetically controlled surface microstructure polishing pad, comprising the following steps: mixing magnetorheological hydroxyl iron powder, carbon nanotube particle powder, silicone rubber curing agent, and silicone rubber to obtain a first mixture; injecting diamond abrasive particles and the first mixture into a 3D printed abrasive tool in sequence; and allowing to stand to obtain a polishing pad.

[0013] Furthermore, the method for preparing the semi-consolidated abrasive magnetically controlled surface microstructure polishing pad also includes the following steps: mixing polymer polyol, diisocyanate, chain extender, and catalyst to obtain a second mixture; mixing cerium oxide abrasive powder and the second mixture and injecting them into a 3D printing mold, and vulcanizing and standing to obtain a polishing pad.

[0014] Furthermore, the method for preparing the semi-consolidated abrasive magnetically controlled surface microstructure polishing pad also includes the following steps: diamond abrasive micropowder, carbon nanotube micropowder, and elastic photosensitive resin are mixed, and the polishing pad is obtained by photocuring 3D printing; the ratio of the diamond abrasive micropowder, carbon nanotube micropowder, and elastic photosensitive resin varies with the processing requirements.

[0015] Furthermore, the magnetorheological hydroxyl iron powder, carbon nanotube particle powder, silicone rubber curing agent, and silicone rubber are mixed in a ratio of 2:1:1:6 to obtain a first mixture; and the polymer polyol, diisocyanate, chain extender, and catalyst are mixed in a ratio of 3:5:1:1 to obtain a second mixture.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects: The present invention discloses a semi-consolidated abrasive magnetically controlled surface microstructure polishing pad. The microstructure comprises spiral grooves and drainage grooves, which are arranged on one side of the polishing pad and are biomimetic on the surface of a conch shell. The microstructure comprises spiral grooves and drainage grooves. The other side of the polishing pad is a smooth cambered surface pasted on the outer layer of a tool. The polishing pad is prepared by adopting a magnetorheological iron powder composite solidification strategy. Semi-consolidated abrasives are evenly distributed on the surface of the polishing pad. The polishing pad is used for connection with the surface of flexible polishing tools such as an airbag polishing cover and a small tool polishing head, and is matched with a magnetically controlled polishing method to form ultra-precision composite processing. The polishing pad as an end effector is provided with modularly arranged spiral grooves and drainage grooves on one side. The sizes of the spiral grooves and drainage grooves increase in proportion to the radius of the polishing pad. The spiral grooves on the polishing pad are connected with the drainage grooves, so that the flow performance of the polishing liquid in the polishing area is increased, thereby achieving a better cooling and heat dissipation effect. The modular groove arrangement forms a uniform stress distribution in the processing area, reduces the friction and wear of the polishing pad, and the modular arrangement of the microstructure on the surface of the polishing pad is intended to enhance the contact stability during the polishing process, extend the service life of the polishing pad, and improve the processing efficiency of the workpiece.

[0017] The present invention discloses a semi-consolidated abrasive magnetically controlled surface microstructure polishing pad. Compared with a polishing pad with a general groove texture, the polishing contact area of ​​the polishing pad with a conch shell surface bionic groove texture is increased by at least 15%, and the surface roughness of the workpiece after processing is significantly improved. Under the same conditions, the friction and wear thereof is reduced by more than 30% compared with that of a polishing pad with a general groove texture. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of a semi-consolidated abrasive magnetically controlled surface microstructure polishing pad of the present invention; Figure 2 A bottom view of a semi-consolidated abrasive magnetically controlled surface microstructure polishing pad according to the present invention; Figure 3 A top view of a semi-consolidated abrasive magnetically controlled surface microstructure polishing pad according to the present invention; Figure 4 Schematic diagram of the surface microstructure distribution structure of the polishing pad in an embodiment of the present invention; Figure 5 This is a bottom view of the cross section of the 3D printing abrasive tool in an embodiment of the present invention; Figure 6 A top view of the lower mold in an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the lower mold in an embodiment of the present invention; Figure 8 Schematic diagram of the spiral groove in the embodiment of the present invention.

[0019] Reference numerals: 1- spiral groove; 2- drainage groove; 3- polishing pad; 4- end face; 5- smooth arc surface; 6- 3D printing mold; 7- upper mold; 8- lower mold; 9- semi-consolidated abrasive prefabricated hole. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0021] Example 1 The present invention discloses a semi-consolidated abrasive magnetically controlled surface microstructure polishing pad, comprising a polishing pad 3, one side of the polishing pad 3 is a circular arc surface, such as Figure 1 As shown, a plurality of spiral grooves 1 and drainage grooves 2 are arranged on the arc surface, and the plurality of spiral grooves 1 and drainage grooves 2 are connected in an arc manner; the other side of the polishing pad 3 is a smooth arc surface 5, as shown in FIG. Figure 3 As shown, it is used for fixed connection with the outer surface of the polishing tool, and the top of the smooth arc surface is the end surface 4; a plurality of the spiral grooves 1 are modularly installed on one side of the polishing pad 3.

[0022] One side of the polishing pad 3 is provided with a microstructure of bionic conch shell surface grooves arranged in a modular manner and semi-consolidated abrasive particles; the other side of the polishing pad is a smooth arc surface 5 pasted on the outer layer of the tool, which is used to connect with the surface of flexible polishing tools such as airbag polishing covers and small tool polishing heads, and is combined with a magnetic control polishing method to form ultra-precision composite processing.

[0023] By extracting the characteristics of the bionic conch shell, the width of the conch shell surface ribs, the width of the rib side ribs, the spacing of the micro grooves, the rib height, the rib height on both sides of the ribs, the rib minor diameter, the rib major diameter, and the initial inclination of the longitudinal spiral are obtained, and the fitting convergence model is obtained after topological optimization. Using the wear-resistant characteristics of the bionic prototype, the microstructure is applied to the polishing pad 3 to improve the normal polishing force of the polishing pad 3 and optimize the contact distribution, making full use of the surface characteristics of the conch shell, reducing the wear of the elastic polishing pad, and improving its performance, thereby improving the polishing efficiency and processing quality of the workpiece.

[0024] Compared with the general groove texture, the polishing pad 3 with the conch shell bionic groove texture has a polishing contact area increased by at least 15%, and the surface roughness of the workpiece after processing is significantly improved. Under the same conditions, its friction and wear is reduced by more than 30% compared with the general groove texture.

[0025] One side of the polishing pad 3 is an arc surface, on which are provided modularly arranged spiral grooves 1 and drainage grooves 2. The sizes of the spiral grooves 1 and the drainage grooves 2 increase proportionally with the radius of the polishing pad 3. The spiral grooves 1 on the polishing pad 3 are connected with the drainage grooves 2, so that the flow performance of the polishing liquid in the polishing area is increased to achieve a better cooling and heat dissipation effect. The modular arrangement of the spiral grooves 1 forms a uniform stress distribution in the processing area, reducing the friction and wear of the polishing pad 3. The modular arrangement of the surface microstructure of the polishing pad 3 is intended to enhance the contact stability during the polishing process, extend the service life of the polishing pad, and improve the processing efficiency of the workpiece.

[0026] In summary, the polishing pad 3 optimizes the uniformity of stress distribution and the fluidity of the grinding fluid by adopting the bionic conch shell surface microstructure design method, and significantly reduces its friction and wear during the polishing process.

[0027] Example 2 The present invention provides a semi-consolidated abrasive magnetically controlled surface microstructure polishing pad, such as Figure 2 As shown, one side of the polishing pad 3 is an arc surface, and a plurality of spiral grooves 1 and drainage grooves 2 are arranged on the arc surface. The spiral grooves 1 are modularly installed on one side of the polishing pad 3. The spiral grooves 1 are in a tree trunk shape, and the drainage grooves 2 are in a branch shape, as shown in FIG. Figure 4 As shown, the minimum bionic unit of the spiral groove 1 and the drainage groove 2 has a smooth transition slope, which enhances the flow effect, flow velocity and integrity of the flow area, thereby ensuring the stability of the processing process. The improved contact performance and flow characteristics significantly reduce the friction and wear of the bionic polishing pad, thereby achieving a more uniform material removal process and extending the service life of the polishing pad. In the elastic polishing process, the bionic groove with optimized curvature combined with the annular fluid guide groove plays an important role in ultra-precision polishing, especially for the processing of non-spherical workpieces.

[0028] The nonlinear implicit function setting of the spiral groove 1 along the Ellipse model iteration. Specifically, the spiral groove 1 obtained after the Ellipse model iteration is The nonlinear implicit function setting of the tolerance value is: ,in, is the horizontal axis, is the vertical axis, The major diameter of the ellipse, For the elliptical path, , , is a constant, such as Figure 8 shown.

[0029] In this embodiment, =0.49, =0.87, =5.47, =11.97, =-1, in mm, so that the spiral groove 1 can meet the arc requirements of contact processing. In addition, The tolerance value represents the convergence accuracy, which is derived from the accuracy required for bionic data extraction, ensuring that the obtained solution is very accurate and reliable.

[0030] =0.49, =0.87, =5.47, =11.97, =-1 is one of the groove curves, which can be adjusted accordingly according to actual conditions.

[0031] A plurality of spiral grooves 1 are modularly installed on one side of the polishing pad 3, and the spiral groove 1 is connected to the drainage groove 2 in an arc shape. The wear form of the polishing pad 3 is changed, and the effect of blocking wear debris is played, thereby improving the wear resistance of the polishing pad 3. It can improve the fluidity of the grinding fluid, uniform polishing force, reduce polishing temperature, enhance lubrication performance, speed up the discharge efficiency of old abrasive particles, increase the adaptability of the polishing surface shape, improve polishing efficiency, and improve the surface processing quality of the workpiece. If the polishing debris cannot be discharged in time, the surface quality will deteriorate. Therefore, this structure can improve the fault tolerance of the abrasive particles, enhance the fluidity of the grinding fluid, better remove the peak of the polishing surface profile, improve the uniformity of stress distribution, and reduce the sub-surface microcracks of the workpiece mainly due to plastic removal. The angle between two adjacent spiral groove 1 modules is 5°-10°, and the diameter of the spiral groove 1 decreases from the end face 4 to the other end. The size of the angle affects the overall layout of the spiral groove 1 and the flow path of the fluid therein. A smaller angle means that the spiral is tighter and the flow path of the fluid therein is more tortuous; while a larger angle makes the spiral sparser and the flow path is relatively straighter. The angle in this embodiment can more effectively remove materials, dissipate heat, and collect waste liquid, thereby obtaining a better polishing effect.

[0032] The drainage trough 2 is arranged in concentric circles. Arrangement, among which, is the horizontal axis, is the vertical axis, The major diameter of the ellipse, For the elliptical path, is a constant.

[0033] The drainage groove 2 is perpendicular to the rotation axis of the polishing pad 3 to ensure that the fluid can be effectively guided along a path perpendicular to the rotation direction of the polishing pad 3, thereby avoiding interference of the fluid with the polishing process and ensuring that the fluid can evenly cover the surface of the polishing pad 3 or be effectively removed therefrom.

[0034] When the polishing pad 3 rotates at high speed, the polishing liquid will have a certain boosting effect on the end-effector, which is beneficial to form a stable processing area between the polishing pad 3 and the workpiece. At the same time, when the tool rotates at high speed, it is beneficial to the discharge of grinding chips, which can reduce the wear of the polishing pad, extend the service life of the polishing pad, improve the uneven distribution of abrasive particles, and the problem of difficult-to-control removal process caused by uncertain abrasive trajectory, aiming to delay the generation of microcracks on the workpiece surface.

[0035] like Figure 5 As shown, the polishing pad 3 is processed by a 3D printing mold 6, and the 3D printing mold 6 includes an upper mold 7 and a lower mold 8, and the polishing pad 3 is arranged between the upper mold 7 and the lower mold 8. The upper mold 7 and the lower mold 8 are both prepared by photocuring 3D printing. By using 3D printing technology to process the polishing pad 3, the processing efficiency and accuracy are improved, the cost is reduced, and the design flexibility is enhanced.

[0036] like Figure 6 He Ru Figure 7 As shown, evenly arranged semi-consolidated abrasive preformed holes 9 are provided on the inner surface of the lower die 8 to enhance the contact stability of the polishing pad 3 during processing. The holes 9 need to be evenly arranged on the inner surface of the lower die 8 to ensure that the abrasive particles of the polishing pad 3 can be evenly distributed and act on the workpiece surface when the polishing pad 3 is working. The layout of the semi-consolidated abrasive preformed holes 9 can be adjusted and optimized according to the shape, size and expected polishing effect of the polishing pad 3.

[0037] The present invention discloses a semi-consolidated abrasive magnetically controlled surface microstructure polishing pad, which solves the problem of tool wear and blockage caused by poor material properties and poor contact stability of polyurethane polishing pads in the traditional tool polishing process, resulting in unstable material removal function. The modular spiral grooves 1 of the microstructure of the outer arc surface of the polishing pad 3 are arranged in the processing area to form a uniform stress distribution, thereby reducing the friction and wear of the polishing pad 3. At the same time, the semi-consolidated abrasive preset holes 9 form a relatively uniform and stable material removal environment, thereby enhancing the contact stability in the processing process, extending the service life of the polishing pad, and improving the processing efficiency of the workpiece.

[0038] Example 3 The present invention provides a method for preparing a semi-consolidated abrasive magnetically controlled surface microstructure polishing pad, comprising the following steps: The magnetorheological hydroxyl iron powder, carbon nanotube particle powder, silicone rubber curing agent, and silicone rubber are mixed to obtain a first mixture; the diamond abrasive particle powder and the first mixture are sequentially injected into the 3D printed abrasive tool 6; and the polishing pad 3 is obtained by standing. The magnetorheological hydroxyl iron powder, carbon nanotube particle powder, silicone rubber curing agent, and silicone rubber are mixed in a ratio of 2:1:1:6 to obtain the first mixture.

[0039] Specifically, 2 μm magnetorheological hydroxyl iron powder, carbon nanotube particle powder, silicone rubber curing agent, and silicone rubber are mixed in a ratio of 2:1:1:6 to obtain a first mixture, and the first mixture is stirred at a constant speed for 3 minutes using an electric stirrer, and diamond abrasive particle powder is weighed, and the proportion of diamond abrasive particle powder to the first mixture is 3% to 9%, and the diamond abrasive particles are evenly sprinkled into the semi-consolidated abrasive prefabricated hole 9, and then the first mixture is injected into the 3D printing mold 6. In this embodiment, the 3D printing mold 6 is made of plastic. It is allowed to stand for 5 minutes in a vacuum environment to eliminate excess bubbles, and then placed in a uniform preset magnetic field generated by a 100-300mT permanent magnet, and allowed to stand for 3 hours. After the curing reaction is completed, the 3D printing abrasive 6 is taken out of the magnetic field, and allowed to stand in a constant temperature box for 24 hours, and the final polishing pad 3 is trimmed.

[0040] Example 4 The present invention provides a method for preparing a semi-consolidated abrasive magnetically controlled surface microstructure polishing pad, comprising the following steps: The polymer polyol, diisocyanate, chain extender and catalyst are mixed to obtain a second mixture; the cerium oxide abrasive powder and the second mixture are mixed and injected into the 3D printing mold 6, and the polishing pad 3 is obtained by vulcanization and standing. The polymer polyol, diisocyanate, chain extender and catalyst are mixed in a ratio of 3:5:1:1 to obtain the second mixture.

[0041] Specifically, polymer polyol, diisocyanate, chain extender and catalyst are mixed in a ratio of 3:5:1:1, and then cerium oxide abrasive powder with a particle size of 2 μm is added in a weight ratio of 25%-30%. After being fully mixed, it is poured into the 3D printing mold 6. In this embodiment, the 3D printing mold 6 is made of metal. After a vulcanization temperature of 60-80°C and 3h of vulcanization heating (heating and vulcanization occur simultaneously), it is statically formed into a polishing pad 3. It should be noted that the polishing pad 3 here is a polyurethane polishing pad to achieve better wear resistance and polishing effect of the polishing pad 3.

[0042] Example 5 The present invention provides a method for preparing a semi-consolidated abrasive magnetically controlled surface microstructure polishing pad, comprising the following steps: Diamond abrasive micropowder, carbon nanotube micropowder and elastic photosensitive resin are mixed and subjected to photocuring 3D printing to obtain a polishing pad 3; the proportion of the diamond abrasive micropowder, carbon nanotube micropowder and elastic photosensitive resin varies with processing requirements.

[0043] Specifically, 25% of diamond abrasive micropowder and 10% of carbon nanotube micropowder are fully mixed with elastic photosensitive resin, and the polishing pad 3 is directly manufactured by photocuring 3D printing. In this embodiment, the polishing pad 3 has a tensile strength of 4.1-5.0 MPa, an elongation at break of 51-60%, a Shore hardness of 90-95A, and a viscosity of 775 cps.

[0044] The tensile strength refers to the ratio of the maximum tensile force that a material can withstand in a tensile test to its original cross-sectional area. The tensile strength of 4.1-5.0 MPa reflects the mechanical strength and durability of the polishing pad 3.

[0045] The elongation at break refers to the ratio of the elongation of a specimen at break to its original length during a tensile test. The elongation at break of the polishing pad 3 is between 51% and 60%, and it has good elasticity and ductility, which helps the polishing pad 3 not to break easily when under pressure, thereby extending its service life.

[0046] Shore hardness is a method to measure the hardness of a material. A represents measurement using a Shore A durometer. The Shore hardness of the polishing pad 3 is between 90 and 95A, which is moderate in hardness. This helps the polishing pad 3 maintain a stable shape and performance during the polishing process while providing sufficient elasticity to adapt to different polishing requirements.

[0047] Viscosity is a physical quantity that measures the resistance of a fluid to flow.

[0048] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0049] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

Claims

1. A semi-consolidated abrasive magnetically controlled surface microstructure polishing pad, characterized in that: The polishing pad (3) comprises a polishing pad (3), one side of which is an arc surface, on which a plurality of spiral grooves (1) and drainage grooves (2) are arranged, and the plurality of spiral grooves (1) and drainage grooves (2) are connected in an arc manner; the other side of the polishing pad (3) is a smooth arc surface (5) for being fixedly connected to the outer surface of a polishing tool, and the top of the smooth arc surface is an end surface (4); the plurality of spiral grooves (1) are modularly mounted on one side of the polishing pad (3).

2. The semi-consolidated abrasive magnetically controlled surface microstructure polishing pad according to claim 1, characterized in that: The spiral groove (1) is set along the nonlinear implicit function of the Ellipse model iteration; The nonlinear implicit function is: ; in, is the horizontal axis, is the vertical axis, The major diameter of the ellipse, For the elliptical path, , , is a constant.

3. The semi-consolidated abrasive magnetically controlled surface microstructure polishing pad according to claim 1, characterized in that: The angle between two adjacent spiral groove (1) modules is 5°-10°; The diameter of the spiral groove (1) decreases continuously from the end surface (4) to the other end.

4. The semi-consolidated abrasive magnetically controlled surface microstructure polishing pad according to claim 3, characterized in that: The plurality of drainage grooves (2) are arranged in concentric circles; The drainage groove (2) is perpendicular to the rotation axis of the polishing pad (3).

5. The semi-consolidated abrasive magnetically controlled surface microstructure polishing pad according to claim 4, characterized in that: The polishing pad (3) is processed by a 3D printing mold (6), wherein the 3D printing mold (6) comprises an upper mold (7) and a lower mold (8), and the polishing pad (3) is arranged between the upper mold (7) and the lower mold (8).

6. The semi-consolidated abrasive magnetically controlled surface microstructure polishing pad according to claim 5, characterized in that: The inner surface of the lower die (8) is provided with evenly arranged semi-consolidated abrasive grain prefabricated holes (9).

7. A method for preparing a semi-consolidated abrasive magnetically controlled surface microstructure polishing pad, characterized in that: The following steps are involved: Mixing magnetorheological hydroxy iron powder, carbon nanotube particle powder, silicone rubber curing agent, and silicone rubber to obtain a first mixture; Diamond abrasive particles and the first mixture are injected into a 3D printed abrasive tool (6) in sequence; the abrasive tool is allowed to stand to obtain a polishing pad (3).

8. The method for preparing a semi-consolidated abrasive magnetically controlled surface microstructure polishing pad according to claim 7, characterized in that: The method for preparing a semi-consolidated abrasive magnetically controlled surface microstructure polishing pad further comprises the following steps: The polymer polyol, the diisocyanate, the chain extender and the catalyst are mixed to obtain a second mixture; The cerium oxide abrasive powder and the second mixture are mixed and injected into a 3D printing mold (6), and then vulcanized and allowed to stand to obtain a polishing pad (3).

9. The semi-consolidated abrasive magnetically controlled surface microstructure polishing pad according to claim 8, characterized in that: The method for preparing a semi-consolidated abrasive magnetically controlled surface microstructure polishing pad further comprises the following steps: Diamond abrasive micropowder, carbon nanotube particle micropowder, and elastic photosensitive resin are mixed and subjected to photocuring 3D printing to obtain a polishing pad (3); The proportions of the diamond abrasive micropowder, carbon nanotube particle micropowder and elastic photosensitive resin vary with processing requirements.

10. The method for preparing a semi-consolidated abrasive magnetically controlled surface microstructure polishing pad according to claim 8, characterized in that: The magnetorheological hydroxyl iron powder, carbon nanotube particles, silicone rubber curing agent and silicone rubber are mixed in a ratio of 2:1:1:6 to obtain a first mixture; The polymer polyol, diisocyanate, chain extender and catalyst are mixed in a ratio of 3:5:1:1 to obtain a second mixture.

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