Grinding and polishing method based on cooperative strengthening of magnetic traction and bird feather texture
The grinding and polishing method that combines magnetic traction with bird feather texture has solved the problems of grinding damage, insufficient lubrication and low precision in traditional grinding and polishing processes. It has achieved efficient and stable processing of hard and brittle materials, reduced grinding force and temperature, avoided precision errors, and enhanced the stability of material removal and the uniformity of polishing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HUBEI UNIV OF ARTS & SCI
- Filing Date
- 2026-01-29
- Publication Date
- 2026-04-21
AI Technical Summary
Traditional grinding and polishing processes suffer from problems such as grinding damage, insufficient lubrication, high equipment costs, low processing accuracy, and errors introduced by multiple clamping operations, making it difficult to achieve efficient and stable processing of hard and brittle materials.
A grinding and polishing method that combines magnetic traction and bird feather texture is adopted to achieve in-situ integrated processing of high-power cooling low-loss grinding, composite grinding and polishing and low/non-destructive magnetic shear rheological polishing on the same equipment. The magnetic field traction and bird feather texture channel overcome the air barrier limitation to form a dynamic composite lubricating film, promote the diversion and guidance of grinding debris, and use the bird feather texture to structurally hold the magnetostrictive polishing film to ensure processing stability.
It enables efficient and stable processing of hard and brittle materials, reduces grinding force and temperature, avoids precision errors, enhances material removal stability and polishing uniformity, and reduces the difficulty of subsequent polishing.
Smart Images
Figure CN121893098A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a polishing method based on the synergistic enhancement of magnetic traction and bird feather texture, belonging to the field of polishing technology. Background Technology
[0002] Grinding and polishing are core technologies supporting the ultra-precision manufacturing of hard and brittle materials, directly determining the workpiece's surface accuracy, surface integrity, and service reliability. Surface and subsurface damage caused by traditional grinding significantly affects subsequent polishing efficiency and quality control, not only increasing the amount of polishing material removed but also potentially inducing new defects due to stress release, becoming a core bottleneck restricting the overall effectiveness of the grinding and polishing process.
[0003] While the microtexture on the surface of the grinding wheel possesses excellent potential for airflow conduction and lubrication enhancement, under high-speed grinding conditions, the high-pressure aerodynamic boundary layer generated by the circumferential rotation of the grinding wheel and the radial centrifugal force create a strong coupling barrier effect. Traditional lubricating media, due to their insufficient kinetic energy, not only struggle to effectively penetrate the air barrier but are also easily and precisely blocked by the high-speed airflow, thus forming a "lubrication blind zone" in the grinding arc region. This blind zone intensifies dry friction, leading to rapid accumulation of grinding force and heat. Especially for hard and brittle materials with low thermal conductivity and high chemical reactivity, this can easily induce grinding burns on the workpiece, while also causing problems such as workpiece material adhesion to abrasive grains and grinding wheel passivation. Existing polishing technologies each have their own advantages and disadvantages, as well as limitations in their suitability: Ion beam polishing has atomic-level removal precision, but its efficiency is extremely low and the equipment cost is high; high-pressure water particle fluid polishing is suitable for complex curved surfaces, but its energy consumption is high and the uniformity of abrasive particle distribution is difficult to control; contour tool contact polishing has good surface consistency, but the tool customization cost is high and wear compensation is complex; free abrasive polishing is suitable for irregular contours, but it is prone to problems such as abrasive particle agglomeration, increased scratches, and low utilization rate.
[0004] Meanwhile, traditional grinding and polishing processes are mostly carried out in steps, requiring specialized equipment and multiple clamping operations, which not only increases turnover costs and time, but also easily introduces positioning errors, thus restricting processing accuracy. Summary of the Invention
[0005] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a grinding and polishing method based on the synergistic enhancement of magnetic traction and bird feather texture. This method achieves in-situ integrated processing of three stages—high-power cooling low-loss grinding, composite grinding and polishing, and low / non-destructive magnetic shear rheological polishing—on the same processing equipment, avoiding accuracy errors caused by secondary clamping. It is also easy to implement and highly versatile. During grinding, the magnetic field traction and bird feather texture channels overcome the air barrier limitations of high-speed grinding, enabling forced penetration and enrichment of the magnetic shear rheological polishing fluid in the grinding zone, forming a high-intensity dynamic composite lubrication in the grinding zone. The film promotes the diversion and guidance of grinding debris, enhances the cooling and lubrication effect, and significantly reduces grinding force and grinding temperature. In composite grinding and polishing, it forms a magnetic shear rheology micro-abrasive to perform composite grinding and polishing on the workpiece, promoting the stability of difficult-to-machine material removal and reducing the difficulty of subsequent polishing. In magnetic shear rheology polishing, the bird feather texture is used to structurally hold the magnetostricted magnetic shear rheology polishing film, which can weaken the dynamic polishing instability caused by the slippage of the magnetic shear rheology polishing film, ensure the stability and uniformity of the polishing process, and enhance the renewal effect of the magnetic shear rheology grinding and polishing fluid.
[0006] To solve the above-mentioned technical problems, the present invention is implemented using the following technical solution: In a first aspect, the present invention provides a polishing method based on the synergistic enhancement of magnetic traction and bird feather texture, comprising: Symmetrical electromagnetic modules are installed on both sides of the protective cover. The workpiece is processed by a grinding wheel with multiple bird feather textures on its surface and a magnetic shear rheological polishing fluid. The multiple bird feather textures are evenly distributed on the surface of the grinding wheel. The magnetic shear rheological polishing fluid includes magnetic nanoparticles and abrasives. The processing includes grinding, composite grinding and polishing, and magnetic shear rheological polishing. The grinding depth between the workpiece and the grinding wheel is controlled to be greater than zero, and the magnetic shear rheological polishing fluid is supplied to the grinding zone formed by the workpiece and the grinding wheel to realize the grinding process of the workpiece. The grinding depth between the workpiece and the grinding wheel is controlled to be zero, and the magnetic shear rheological polishing fluid is supplied to the grinding zone formed by the workpiece and the grinding wheel to achieve composite grinding and polishing of the workpiece. By controlling the grinding depth between the workpiece and the grinding wheel to be greater than zero, and by adjusting the processing parameters and the rheological properties of the magnetic shear rheological polishing fluid, the magnetic shear rheological polishing process of the workpiece is achieved.
[0007] Furthermore, both of the electromagnetic modules are connected to the control unit via wires, and the grinding wheel includes a grinding wheel base; The control unit adjusts the magnetic field strength of the two electromagnetic modules to magnetize the grinding wheel substrate. By adjusting the processing parameters, integrated processing of grinding, composite grinding and polishing, and magnetic shear rheological polishing is achieved. The processing parameters include the rotational speed of the grinding wheel, the feed rate of the workpiece, and the minimum clearance between the workpiece and the grinding wheel.
[0008] Furthermore, the preparation of the grinding wheel with multiple bird feather textures on its surface includes: A laser system is used to process patterns on the surface of the grinding wheel; The electromagnetic module has a tile-shaped structure and includes a magnetic core and a conductive coil wound around the outer periphery of the magnetic core. The magnetic core is detachably connected to the protective cover by bolts. The preparation of the magnetic shear rheological polishing fluid includes: The magnetic shear rheological polishing fluid is prepared by adding magnetic nanoparticles, abrasives, and additives to a base fluid with a shear thickening effect.
[0009] Furthermore, the grinding process of the workpiece includes: The magnetic shear rheodynamic polishing fluid is supplied to the grinding zone formed by the workpiece and the grinding wheel. The excitation current is controlled by the electromagnetic module to generate a magnetic field strength, magnetizing the grinding wheel matrix and forming a dynamic gradient magnetic field in the grinding zone and the feather texture. Using the bird feather texture as a flow channel, the magnetic traction force of the magnetic field guides the magnetic nanoparticles, allowing them to penetrate the grinding zone and form the dynamic composite lubricating film. The magnetic traction force is greater than the airflow repulsion force and centrifugal force generated by the rotation of the grinding wheel.
[0010] Furthermore, the composite grinding and polishing process for the workpiece includes: The magnetic shear rheodynamic polishing fluid is supplied to the grinding zone formed by the workpiece and the grinding wheel along the rotation direction of the grinding wheel; The magnetic shear rheological micro-abrasive is formed by combining the magnetic nanoparticles and the abrasive with the magnetic field. When the grinding depth between the workpiece and the grinding wheel is zero, the magnetic shear rheological micro-abrasive is used to perform composite grinding and polishing on the surface of the workpiece.
[0011] Furthermore, the magnetic shear rheological polishing process for the workpiece includes: Based on the magnetic shear rheodynamic polishing fluid, the magnetic shear rheodynamic polishing film is formed by combining the magnetic field and the flow field formed by the magnetic shear rheodynamic polishing fluid as the grinding wheel rotates. The magnetic shear rheodynamic polishing film is used to perform magnetic shear rheodynamic polishing on the surface of the workpiece. The bird feather texture provides physical holding force to the magnetic shear rheological polishing film, limiting the slippage and splashing of the magnetic shear rheological polishing film under rotation.
[0012] Furthermore, the bird feather texture includes a main groove and a plurality of branch grooves symmetrically opened on both sides of the main groove, and the plurality of branch grooves located on the same side of the main groove are parallel to each other.
[0013] Furthermore, the vertical distance between the bottom end of the electromagnetic module and the surface of the workpiece is 5~60 mm, and the distance between the inner side of the electromagnetic module and the end face of the grinding wheel is 5~30 mm.
[0014] Furthermore, the magnetic shear rheological polishing fluid comprises 70%–95% base fluid, 4%–15% abrasive, 3%–10% magnetic nanoparticles, and 0%–2% additives. The additive is one or more of the following: rust inhibitor, dispersant, pH adjuster, and activator; The abrasive is one or more of diamond, cubic boron nitride, silicon oxide, silicon carbide, boron carbide, aluminum oxide, and cerium oxide; The magnetic nanoparticles are one or more of carbonyl iron powder, iron oxide, and iron-cobalt alloy powder. The base liquid is one of dimethyl silicone oil and nano silica, polyethylene glycol and nano silica, polyhydroxy polymer and water.
[0015] Secondly, the present invention provides a polishing device based on the synergistic enhancement of magnetic traction and bird feather texture, for realizing the polishing method based on the synergistic enhancement of magnetic traction and bird feather texture described in the first aspect. It includes a worktable for placing the workpiece and a protective cover located above the worktable. A rotating grinding wheel is provided inside the protective cover above the workpiece. Electromagnetic modules are symmetrically provided on both sides of the grinding wheel on the inner wall of the protective cover. Both electromagnetic modules are electrically connected to a control unit. A supply nozzle for spraying magnetic shear rheological polishing fluid is provided on the side wall of the protective cover. The working surface of the grinding wheel is uniformly provided with multiple bird feather textures, and the magnetic shear rheodynamic polishing fluid includes magnetic nanoparticles and abrasives.
[0016] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: This grinding and polishing method, based on the synergistic enhancement of magnetic traction and bird feather texture, achieves in-situ integrated processing of three stages—high-power cooling low-loss grinding, composite grinding and polishing, and low / non-destructive magnetic shear rheological polishing—on the same processing equipment by controlling the grinding depth between the workpiece and the grinding wheel. This avoids accuracy errors caused by secondary clamping and is easy to implement and highly versatile. During grinding, the magnetic field traction and bird feather texture channels overcome the air barrier limitations of high-speed grinding, enabling forced penetration and enrichment of the magnetic shear rheological polishing fluid in the grinding zone, forming a high-intensity dynamic composite lubrication. The film promotes the diversion and discharge of grinding debris, enhances the cooling and lubrication effect, and reduces grinding force and grinding temperature. In composite grinding and polishing, it forms a magnetic shear rheology micro-abrasive to perform composite grinding and polishing on the workpiece, enhancing the stability of material removal and reducing the difficulty of subsequent polishing. In magnetic shear rheology polishing, the bird feather texture is used to structurally hold the magnetostricted magnetic shear rheology polishing film, which can weaken the influence of dynamic polishing instability induced by the slippage of the magnetic shear rheology polishing film, ensure the stability and uniformity of the polishing process, and enhance the renewal effect of the magnetic shear rheology grinding and polishing fluid. Attached Figure Description
[0017] Figure 1 This is a three-dimensional structural schematic diagram of a polishing device based on the synergistic reinforcement of magnetic traction and bird feather texture according to an embodiment of the present invention; Figure 2 This is a three-dimensional structural schematic diagram of a grinding wheel provided according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the dimensions and structure of the bird feather texture provided in an embodiment of the present invention; Figure 4 This is a three-dimensional structural diagram of an electromagnetic module provided according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the grinding stage provided according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the magnetic field direction and magnetic nanoparticle distribution in the grinding zone and bird feather texture according to an embodiment of the present invention. Figure 7 This is a schematic diagram of the composite grinding and polishing process provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of magnetic shear rheological polishing process provided according to an embodiment of the present invention; Figure 9 This is a schematic flowchart of a polishing method based on the synergistic enhancement of magnetic traction and bird feather texture according to an embodiment of the present invention.
[0018] In the diagram: 1. Grinding wheel; 11. Grinding wheel base; 2. Feather texture; 21. Main groove; 22. Branch groove; 3. Protective cover; 4. Electromagnetic module; 41. Magnetic core; 42. Conductive coil; 5. Bolt; 6. Worktable; 7. Workpiece; 8. Supply nozzle; 9. Magnetic shear rheological polishing fluid; 91. Magnetic nanoparticles; 92. Abrasive; 10. Control unit. Detailed Implementation
[0019] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.
[0020] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.
[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances. Example 1:
[0022] like Figure 9 As shown, this invention provides a polishing method based on the synergistic enhancement of magnetic traction and bird feather texture, comprising: Symmetrical electromagnetic modules 4 are installed on both sides of the protective cover 3. The workpiece 7 is processed by a grinding wheel 1 with multiple bird feather textures 2 on its surface and a magnetic shear rheological polishing fluid 9. The multiple bird feather textures 2 are evenly distributed on the surface of the grinding wheel 1. The magnetic shear rheological polishing fluid 9 includes magnetic nanoparticles 91 and abrasives 92. The processing includes grinding, composite grinding and polishing and magnetic shear rheological polishing. The grinding depth between the workpiece 7 and the grinding wheel 1 is controlled to be greater than zero, and the magnetic shear rheological polishing fluid 9 is supplied to the grinding zone formed by the workpiece 7 and the grinding wheel 1 to realize the grinding process of the workpiece 7. The grinding depth between the workpiece 7 and the grinding wheel 1 is controlled to be zero, and the magnetic shear rheological polishing fluid 9 is supplied to the grinding zone formed by the workpiece 7 and the grinding wheel 1 to realize the composite grinding and polishing process of the workpiece 7. The grinding depth between the workpiece 7 and the grinding wheel 1 is controlled to be greater than zero. The magnetic shear rheological polishing of the workpiece 7 is achieved by adjusting the processing parameters and the rheological properties of the magnetic shear rheological polishing fluid 9. Optionally, the rheological properties of the magnetic shear rheological polishing fluid 9 can be adjusted by adjusting the composition of the magnetic shear rheological polishing fluid 9.
[0023] Specifically, the grinding wheel 1 includes a grinding wheel base 11. The present invention utilizes electromagnetic modules 4 arranged on both sides of the protective cover 3 to magnetize the grinding wheel base 11, thereby simultaneously introducing magnetic induction intensity acting on the surface of the workpiece 7 during grinding, composite grinding and polishing, and magnetic shear rheological polishing. By adjusting the processing parameters, the three stages of in-situ integrated processing of high-power cooling low-loss grinding, composite grinding and polishing, and low / non-destructive magnetic shear rheological polishing can be achieved.
[0024] This invention controls the grinding depth between the workpiece 7 and the grinding wheel 1, achieving in-situ integrated processing of three stages—high-power cooling low-loss grinding, composite grinding and polishing, and low / non-destructive magnetic shear rheological polishing—on the same processing equipment. This avoids accuracy errors caused by secondary clamping and is easy to implement and highly versatile. During grinding, the magnetic field traction and the bird feather texture 2 channel overcome the air barrier limitations of high-speed grinding, enabling forced penetration and enrichment of the magnetic shear rheological polishing fluid 9 in the grinding zone. This forms a high-strength dynamic composite lubricating film in the grinding zone, promoting the diversion of grinding debris. The guide plate enhances the cooling and lubrication effect, reducing grinding force and grinding temperature. During composite grinding and polishing, a magnetic shear rheological micro-abrasive is formed to perform composite grinding and polishing on the workpiece 7, enhancing the stability of material removal and reducing the difficulty of subsequent polishing. During magnetic shear rheological polishing, the bird feather texture 2 is used to structurally hold the magnetostricted magnetic shear rheological polishing film, which can weaken the influence of dynamic polishing instability induced by the slippage of the magnetic shear rheological polishing film, ensuring the stability and uniformity of the polishing process, while enhancing the renewal effect of the magnetic shear rheological grinding and polishing fluid 9.
[0025] like Figure 5 and Figure 6 As shown, where H represents the direction of the magnetic field, V1 is the rotation direction of the grinding wheel 1, and V2 is the feed direction of the workpiece 7, in this embodiment, the grinding process of the workpiece 7 includes: The magnetic shear rheodynamic polishing fluid 9 is supplied to the grinding zone formed by the workpiece 7 and the grinding wheel 1. The excitation current is controlled by the electromagnetic module 4 to generate a magnetic field strength, magnetizing the grinding wheel matrix 11, and forming a dynamic gradient magnetic field in the grinding zone and the feather texture 2. Using the bird feather texture 2 as a flow channel, the magnetic nanoparticles 91 are guided by the magnetic traction force of the magnetic field, so that the magnetic nanoparticles 91 can be accurately penetrated into the grinding zone, forming a high-strength lubrication-bearing composite film in the grinding zone, namely the dynamic composite lubrication film. The magnetic traction force is greater than the airflow repulsion and centrifugal force generated by the rotation of the grinding wheel 1, which can force the magnetic shear rheodynamic polishing fluid 9 to break through the airflow boundary layer and eliminate the "liquid deficiency" phenomenon in the grinding zone.
[0026] like Figure 7 As shown, in this embodiment, the composite grinding and polishing process for workpiece 7 includes: The magnetic shear rheodynamic polishing fluid 9 is supplied to the grinding zone formed by the workpiece 7 and the grinding wheel 1 along the rotation direction of the grinding wheel 1. At this time, magnetic nanoparticles 91 are supplied along the rotation direction of the grinding wheel 1 and dispersed in the tiny grinding gap between the grinding wheel 1 and the workpiece 7. Due to the thickening effect of the magnetic field, particle "clusters" containing free abrasive particles 92 are generated, which modify the surface of the grinding wheel 1 and sharpen the abrasive particles, and promote the stability of the removal of difficult-to-machine materials. The magnetic shear rheological micro-abrasive is formed by combining the magnetic nanoparticles 91 and the abrasive 92 with the magnetic field. When the grinding depth between the workpiece 7 and the grinding wheel 1 is zero, the magnetic shear rheological micro-abrasive is used to perform composite grinding and polishing on the surface of the workpiece 7. Specifically, the magnetic nanoparticles 91 and the free abrasive 92 filling the bird feather texture 2 channel on the surface of the grinding wheel matrix 11 form a magnetic shear rheological micro-abrasive, so that while the grinding wheel 1 micro-contacts and grinds the surface of the workpiece 7, the magnetic shear rheological micro-abrasive performs composite grinding and polishing on the surface of the workpiece 7.
[0027] like Figure 8 As shown, in this embodiment, the magnetic shear rheological polishing process for workpiece 7 includes: Based on the magnetic shear rheodynamic polishing fluid 9, the magnetic shear rheodynamic polishing film is formed by the magnetic field and the flow field formed by the magnetic shear rheodynamic polishing fluid 9 as the grinding wheel 1 rotates. The magnetic shear rheodynamic polishing film is used to perform magnetic shear rheodynamic polishing on the surface of the workpiece 7. Specifically, under the action of magnetic field and flow field, the magnetic shear rheodynamic polishing liquid 9 undergoes magnetostrictive enhancement and mechanostrictive thickening effects, forming a near-solid magnetic shear rheodynamic polishing film; The bird feather texture 2 provides physical holding force to the magnetic shear rheological polishing film, limiting the slippage and splashing of the magnetic shear rheological polishing film under rotation, driving the free abrasive 92 to perform in-situ finishing of the grinding surface of the workpiece 7, and at the same time, the magnetic shear rheological polishing fluid 9 is renewed as the grinding wheel 1 rotates.
[0028] In this embodiment, both electromagnetic modules 4 are connected to the control unit 10 via wires. The control unit 10 adjusts the magnetic field strength of the two electromagnetic modules 4 to magnetize the grinding wheel substrate 11. By adjusting the processing parameters, integrated processing of grinding, composite grinding and polishing, and magnetic shear rheological polishing is achieved. The processing parameters include the rotational speed of the grinding wheel 1, the feed speed of the workpiece 7, and the minimum gap between the workpiece 7 and the grinding wheel 1. Optionally, the control unit 10 is a frequency conversion control unit.
[0029] like Figures 2-4 As shown, in this embodiment, the preparation of the grinding wheel 1 with multiple bird feather textures 2 on its surface includes: A laser system is used to process the surface of the grinding wheel 1 with a pattern; The electromagnetic module 4 has a tile-shaped structure. The electromagnetic module 4 includes a magnetic core 41 and a conductive coil 42 wound around the outer periphery of the magnetic core 41. The magnetic core 41 is detachably connected to the protective cover 3 by bolts 5. The vertical distance between the bottom end of the electromagnetic module 4 and the surface of the workpiece 7 is 5~60 mm, and the distance between the inner side of the electromagnetic module 4 and the end face of the grinding wheel 1 is 5~30 mm.
[0030] Specifically, holes are drilled at both ends of the side of the magnetic core 41, and it is fixed to both sides of the protective cover 3 by bolts 5. The control unit 10 generates a magnetic field strength of more than 50 mT in the grinding area.
[0031] In this embodiment, the preparation of the magnetic shear rheological polishing fluid 9 includes: adding magnetic nanoparticles 91, abrasive 92, and additives to a base liquid with a shear thickening effect to prepare the magnetic shear rheological polishing fluid 9. The magnetic shear rheological polishing fluid 9 comprises 70%–95% base liquid, 4%–15% abrasive 92, 3%–10% magnetic nanoparticles 91, and 0%–2% additives. The additives are one or more of rust inhibitors, dispersants, pH adjusters, and activators. The abrasive 92 is one or more of diamond, cubic boron nitride, silicon oxide, silicon carbide, boron carbide, aluminum oxide, and cerium oxide. The magnetic nanoparticles 91 are one or more of carbonyl iron powder, iron(III) oxide, and iron-cobalt alloy powder. The base liquid is one of dimethyl silicone oil and nano-silica, polyethylene glycol and nano-silica, polyhydroxy polymer, and water.
[0032] Specifically, the base fluid is a shear rheology base fluid, and the abrasive 92 is a free abrasive; the base fluid accounts for 70% to 95% of the mass fraction of the magnetic shear rheology polishing fluid 9; the particle size range of the abrasive 92 is 0.5-20 μm; and the particle size range of the magnetic nanoparticles 91 is 5-35 nm.
[0033] like Figure 3 As shown, in this embodiment, the bird feather texture 2 includes a main groove 21 and a plurality of branch grooves 22 symmetrically opened on both sides of the main groove 21. The plurality of branch grooves 22 located on the same side of the main groove 21 are parallel to each other; the included angle between the main groove 21 and the branch grooves 22 is 45°. Example 2:
[0034] like Figure 1 As shown, the present invention provides a polishing device based on the synergistic enhancement of magnetic traction and bird feather texture, which is used to implement the polishing method based on the synergistic enhancement of magnetic traction and bird feather texture described in Embodiment 1. It includes a worktable 6 for placing the workpiece 7 and a protective cover 3 located above the worktable 6. A grinding wheel 1 is provided rotatably connected inside the protective cover 3 above the workpiece 7. Electromagnetic modules 4 are symmetrically provided on both sides of the grinding wheel 1 on the inner wall of the protective cover 3. Both electromagnetic modules 4 are electrically connected to the control unit 10. A supply nozzle 8 for spraying magnetic shear rheological polishing fluid 9 is provided on the side wall of the protective cover 3. The working surface of the grinding wheel 1 is uniformly provided with multiple bird feather textures 2, and the magnetic shear rheodynamic polishing fluid 9 includes magnetic nanoparticles 91 and abrasive 92.
[0035] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.
Claims
1. A polishing method based on the synergistic enhancement of magnetic traction and bird feather texture, characterized in that, include: Symmetrical electromagnetic modules (4) are installed on both sides of the protective cover (3). The workpiece (7) is processed by a grinding wheel (1) with multiple bird feather textures (2) on its surface and a magnetic shear rheological polishing fluid (9). The multiple bird feather textures (2) are evenly distributed on the surface of the grinding wheel (1). The magnetic shear rheological polishing fluid (9) includes magnetic nanoparticles (91) and abrasives (92). The processing includes grinding, composite grinding and polishing and magnetic shear rheological polishing. The grinding depth between the workpiece (7) and the grinding wheel (1) is controlled to be greater than zero, and the magnetic shear rheological polishing fluid (9) is supplied to the grinding zone formed by the workpiece (7) and the grinding wheel (1) to realize the grinding process of the workpiece (7); The grinding depth between the workpiece (7) and the grinding wheel (1) is controlled to be zero, and the magnetic shear rheological grinding and polishing fluid (9) is supplied to the grinding zone formed by the workpiece (7) and the grinding wheel (1) to realize the composite grinding and polishing process of the workpiece (7). By controlling the grinding depth between the workpiece (7) and the grinding wheel (1) to be greater than zero, and by adjusting the processing parameters and the rheological properties of the magnetic shear rheological polishing fluid (9), the magnetic shear rheological polishing of the workpiece (7) can be achieved.
2. The polishing method based on the synergistic enhancement of magnetic traction and bird feather texture according to claim 1, characterized in that, Both of the electromagnetic modules (4) are connected to the control unit (10) via wires, and the grinding wheel (1) includes a grinding wheel base (11). By adjusting the magnetic field strength of the two electromagnetic modules (4) through the control unit (10), the grinding wheel base (11) is magnetized. By adjusting the processing parameters, the integrated processing of grinding, composite grinding and polishing and magnetic shear rheological polishing is realized. The processing parameters include the rotational speed of the grinding wheel (1), the feed rate of the workpiece (7), and the minimum gap between the workpiece (7) and the grinding wheel (1).
3. The polishing method based on the synergistic enhancement of magnetic traction and bird feather texture according to claim 1, characterized in that, The preparation of the grinding wheel (1) with multiple bird feather textures (2) on its surface includes: A laser system is used to process the surface of the grinding wheel (1) to create a pattern; The electromagnetic module (4) has a tile-shaped structure. The electromagnetic module (4) includes a magnetic core (41) and a conductive coil (42) wound around the outer periphery of the magnetic core (41). The magnetic core (41) is detachably connected to the protective cover (3) by bolts (5). The preparation of the magnetic shear rheological polishing fluid (9) includes: The magnetic shear rheological polishing fluid (9) is prepared by adding magnetic nanoparticles (91), abrasive (92) and additives to a base fluid with a shear thickening effect.
4. The polishing method based on the synergistic enhancement of magnetic traction and bird feather texture according to claim 1, characterized in that, The grinding process of the workpiece (7) includes: The magnetic shear rheodynamic polishing fluid (9) is supplied to the grinding zone formed by the workpiece (7) and the grinding wheel (1). The excitation current is controlled by the electromagnetic module (4) to generate a magnetic field strength, magnetizing the grinding wheel matrix (11) and forming a dynamic gradient magnetic field in the grinding zone and the feather texture (2). Using the bird feather texture (2) as a flow channel, the magnetic nanoparticles (91) are guided by the magnetic traction force of the magnetic field, so that the magnetic nanoparticles (91) penetrate into the grinding zone and form the dynamic composite lubricating film. The magnetic traction force is greater than the airflow repulsion force and centrifugal force generated by the rotation of the grinding wheel (1).
5. The polishing method based on the synergistic enhancement of magnetic traction and bird feather texture according to claim 4, characterized in that, The composite grinding and polishing process for the workpiece (7) includes: The magnetic shear rheodynamic polishing fluid (9) is supplied to the grinding zone formed by the workpiece (7) and the grinding wheel (1) along the rotation direction of the grinding wheel (1). The magnetic shear rheological micro-abrasive is formed by combining the magnetic nanoparticles (91) and the abrasive (92) with the magnetic field. When the grinding depth between the workpiece (7) and the grinding wheel (1) is equal to zero, the magnetic shear rheological micro-abrasive is used to perform composite grinding and polishing on the surface of the workpiece (7).
6. The polishing method based on the synergistic enhancement of magnetic traction and bird feather texture according to claim 4, characterized in that, The magnetic shear rheological polishing process for the workpiece (7) includes: Based on the magnetic shear rheodynamic polishing fluid (9), the magnetic shear rheodynamic polishing film is formed by the magnetic field and the flow field formed by the magnetic shear rheodynamic polishing fluid (9) as the grinding wheel (1) rotates. The magnetic shear rheodynamic polishing film is used to perform magnetic shear rheodynamic polishing on the surface of the workpiece (7). The bird feather texture (2) provides physical holding force to the magnetic shear rheological polishing film, limiting the slippage and splashing of the magnetic shear rheological polishing film under rotation.
7. The polishing method based on the synergistic enhancement of magnetic traction and bird feather texture according to claim 1, characterized in that, The feather texture (2) includes a main groove (21) and a plurality of branch grooves (22) symmetrically opened on both sides of the main groove (21), and the plurality of branch grooves (22) located on the same side of the main groove (21) are parallel to each other.
8. The polishing method based on the synergistic enhancement of magnetic traction and bird feather texture according to claim 1, characterized in that, The vertical distance between the bottom end of the electromagnetic module (4) and the surface of the workpiece (7) is 5~60 mm, and the distance between the inner side of the electromagnetic module (4) and the end face of the grinding wheel (1) is 5~30 mm.
9. The polishing method based on the synergistic enhancement of magnetic traction and bird feather texture according to claim 1, characterized in that, The magnetic shear rheodynamic polishing fluid (9) comprises 70% to 95% base fluid, 4% to 15% abrasive (92), 3% to 10% magnetic nanoparticles (91), and 0% to 2% additives. The additive is one or more of the following: rust inhibitor, dispersant, pH adjuster, and activator; The abrasive (92) is one or more of diamond, cubic boron nitride, silicon oxide, silicon carbide, boron carbide, aluminum oxide, and cerium oxide; The magnetic nanoparticles (91) are one or more of carbonyl iron powder, iron oxide, and iron-cobalt alloy powder; The base liquid is one of dimethyl silicone oil and nano silica, polyethylene glycol and nano silica, polyhydroxy polymer and water.
10. A polishing device based on the synergistic enhancement of magnetic traction and bird feather texture, used to implement the polishing method based on the synergistic enhancement of magnetic traction and bird feather texture as described in any one of claims 1 to 9, characterized in that, The device includes a worktable (6) for placing the workpiece (7) and a protective cover (3) located above the worktable (6). Inside the protective cover (3), above the workpiece (7), there is a rotating grinding wheel (1). The inner wall of the protective cover (3) is symmetrically provided with electromagnetic modules (4) on both sides of the grinding wheel (1). Both electromagnetic modules (4) are electrically connected to the control unit (10). The side wall of the protective cover (3) is provided with a supply nozzle (8) for spraying magnetic shear rheodynamic polishing fluid (9). The working surface of the grinding wheel (1) is uniformly provided with multiple bird feather textures (2), and the magnetic shear rheodynamic polishing fluid (9) includes magnetic nanoparticles (91) and abrasives (92).