A method for manufacturing a superhard abrasive hardness adaptive grinding wheel

Abstract

This invention provides a method for manufacturing a superhard abrasive hardness-adaptive grinding wheel, comprising the following steps: Step 1: Prepare 65 parts of MoS2 nanoparticles and 35 parts of hydroxyguanidine gum solution, then thoroughly mix the MoS2 nanoparticles and hydroxyguanidine gum solution to prepare a mixture; Step 2: Add the mixture prepared in Step 1 to a spraying machine; The mixture then flows from the inside of the grinding wheel through an internal channel to the surface of the grinding wheel. The hydroxyguanidine gum solution, carrying MoS2 nanoparticles, is atomized and broken into small droplets twice during spraying. These layers curl and accumulate to form a garnet-like corrugated structure, giving MoS2 a certain degree of brittleness and ductility. Due to the low thermal conductivity of MoS2 nanoparticles, the heat transfer performance of the lubricant can be improved. Simultaneously, the hydroxyguanidine gum solution restores viscoelasticity, adsorbing the grinding debris generated between the abrasive grains and then carrying it away from the grinding wheel through centrifugal force, improving the surface morphology of the grinding wheel and increasing the grinding efficiency.

Description

Technical Field

[0001] This invention belongs to the field of adaptive grinding wheels, specifically a method for manufacturing an adaptive grinding wheel for superhard abrasive. Background Technology

[0002] With the increasing progress of science and technology, the requirements for material properties in fields such as new energy, military industry, and aerospace are getting higher and higher. There is a great demand for new materials with high temperature resistance, oxidation resistance, corrosion resistance, high strength, and low density[1]. However, single-phase materials cannot simultaneously possess all of the above excellent material properties, so composite materials that combine multiple single-phase materials have been vigorously developed. Carbon fiber reinforced silicon carbide ceramic matrix composite material (C / C-SiC material) is made by adding carbon fiber to SiC ceramic matrix as a toughening reinforcing phase to overcome the shortcomings of single-phase ceramic matrix materials such as poor toughness, high sensitivity, and poor reliability. It has material properties such as high temperature resistance, heat resistance, shock resistance, high wear resistance, high hardness, chemical corrosion resistance, high thermal conductivity, and low thermal expansion coefficient.

[0003] During grinding, fiber-reinforced silicon carbide ceramic materials cannot be adjusted for different grinding fiber angles. Defects such as fiber pull-out, fiber breakage, delamination, fiber matrix debonding, and matrix breakage inevitably occur on the workpiece surface. Furthermore, during grinding, abrasive grains are easily embedded in the workpiece surface due to grinding wheel wear, which also causes impurities to be embedded in the machined surface. Although overflow grinding fluid provides effective lubrication, this method cannot transfer heat out of the grinding zone in time, thus reducing the grinding efficiency of the grinding wheel.

[0004] In summary, the present invention provides a method for manufacturing a superhard abrasive hardness adaptive grinding wheel to solve the above problems. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a method for manufacturing a superhard abrasive hardness adaptive grinding wheel. This addresses the shortcomings of existing technologies where fiber-reinforced silicon carbide ceramic materials cannot be adjusted for different grinding fiber angles during grinding, resulting in unavoidable defects on the workpiece surface such as fiber pull-out, fiber breakage, delamination, fiber matrix debonding, and matrix fracture. Furthermore, during grinding, abrasive grains easily embed into the workpiece surface due to grinding wheel wear, leading to the embedding of impurities on the machined surface. While overflow grinding fluid provides effective lubrication, this method cannot promptly transfer heat out of the grinding zone, thus reducing grinding wheel efficiency.

[0006] A method for manufacturing a superhard abrasive hardness adaptive grinding wheel includes the following steps:

[0007] Step 1: Prepare 65 parts of MoS2 nanoparticles and 35 parts of hydroxyguanylic acid solution, and then thoroughly mix the MoS2 nanoparticles and hydroxyguanylic acid solution to prepare a mixture.

[0008] Step 2: Add the mixture prepared in Step 1 into the spraying machine;

[0009] The third step is to place the superhard grinding wheel on the spraying machine from the second step and clamp it in place. Then, start the spraying machine and spray the mixture evenly onto the outer wall of the superhard grinding wheel.

[0010] The fourth step is to place the coated superhard grinding wheel on a grinding machine for grinding after the coating is applied in the third step.

[0011] Fifth step: After grinding is completed, place the superhard grinding wheel on a centrifuge and start the centrifuge to drive the superhard grinding wheel to rotate. This will cause the mixture to spread on the superhard grinding wheel, thus completing the manufacturing of the hard abrasive self-adaptive grinding wheel.

[0012] Preferably, the preparation of the MoS2 nanoparticles and hydroxyguanosine solution requires maintaining a temperature of 25°C, and the preparation of the MoS2 nanoparticles and hydroxyguanosine solution also requires continuous stirring for 30 minutes.

[0013] Preferably, the hydroxyguanylic acid solution encapsulates MoS2 nanoparticles and is atomized and broken into small droplets twice during the spraying process, releasing the MoS2 nanoparticles onto the surface of the superhard grinding wheel.

[0014] Preferably, in the fourth step of the grinding process, the MoS2 nanoparticle molecular layers overlap into a thin layer and form a layer curl during the grinding process.

[0015] Preferably, the layers are rolled up and stacked to form a garnet corrugated structure, giving MoS2 a certain degree of brittleness and ductility.

[0016] Preferably, during the third step of spraying, the coating is continuously applied to the superhard grinding wheel for 5 minutes, and a layer of mixed liquid is evenly sprayed onto the inner and outer walls of the superhard grinding wheel.

[0017] Preferably, the centrifuge operates at 15,000 revolutions per minute, and the internal temperature of the centrifuge is 30°C when it is rotating.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This invention involves thoroughly mixing 65 parts of MoS2 nanoparticles and 35 parts of hydroxyguanidine gum solution. Due to the anisotropy of the SiCf / SiC composite material, the grinding force generated at different locations on the workpiece varies. The grinding wheel reacts accordingly to these different grinding forces. The mixture then flows from the inside of the grinding wheel through an internal channel to the wheel surface. The hydroxyguanidine gum solution, carrying MoS2 nanoparticles, is atomized and broken into small droplets twice during the spraying process, releasing the MoS2 nanoparticles onto the grinding wheel surface. These MoS2 nanoparticle molecular layers overlap to form a thin layer during grinding. These layers curl and accumulate to form a garnet-like corrugated structure, giving MoS2 a certain degree of brittleness and ductility. Therefore, under external force, the MoS2 nanoparticles can be stretched, forming a physical film on the friction surface. Because of the low thermal conductivity of MoS2 nanoparticles, the heat transfer performance of the lubricant can be improved. Meanwhile, the hydroxyguanethol solution restores viscoelasticity, adsorbs the grinding debris generated between the abrasive grains, and then removes it from the grinding wheel through centrifugal force, thereby improving the surface morphology of the grinding wheel and increasing the grinding efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the process of this invention;

[0021] Figure 2 This is a schematic diagram illustrating the principle of the present invention;

[0022] Figure 3 This is a schematic diagram of the components of the mixture of the present invention.

[0023] Figure 4 This is a schematic diagram of the secondary atomization and fragmentation process of MoS2 nanoparticles encapsulated in the hydroxyguanylic acid solution of the present invention;

[0024] Figure 5 This is a schematic diagram of the physical thin film formed by stretching MoS2 nanoparticles according to the present invention. Detailed Implementation

[0025] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0026] like Figure 1-5 As shown, the present invention provides a method for manufacturing a superhard abrasive hardness adaptive grinding wheel, comprising the following steps:

[0027] Step 1: Prepare 65 parts of MoS2 nanoparticles and 35 parts of hydroxyguanylic acid solution, and then thoroughly mix the MoS2 nanoparticles and hydroxyguanylic acid solution to prepare a mixture.

[0028] Step 2: Add the mixture prepared in Step 1 into the spraying machine;

[0029] The third step is to place the superhard grinding wheel on the spraying machine from the second step and clamp it in place. Then, start the spraying machine and spray the mixture evenly onto the outer wall of the superhard grinding wheel.

[0030] The fourth step is to place the coated superhard grinding wheel on a grinding machine for grinding after the coating is applied in the third step.

[0031] Fifth step: After grinding is completed, place the superhard grinding wheel on a centrifuge and start the centrifuge to drive the superhard grinding wheel to rotate. This will cause the mixture to spread on the superhard grinding wheel, thus completing the manufacturing of the hard abrasive self-adaptive grinding wheel.

[0032] The preparation of the MoS2 nanoparticles and hydroxyguar gum solution requires maintaining a temperature of 25°C. During preparation, continuous stirring for 30 minutes is also necessary. Hydroxyguar gum solution is a typical non-Newtonian fluid with high viscosity and poor flowability. Optimizing the internal flow channel structure parameters and achieving uniform distribution of the internal flow channel around the grinding wheel axis within the matrix, along with the effective removal of the air barrier layer on the grinding wheel surface by the external flow channel, reduces the kinetic energy loss caused by the mutual impact between the hydroxyguar gum solution and the internal flow channel and the breakthrough of the air barrier layer. This ensures that the MoS2 nanoparticles fully fill the gaps between the grinding debris and abrasive grains in the grinding zone of the grinding wheel.

[0033] The hydroxyguar gum solution, carrying MoS2 nanoparticles, is atomized twice and broken into small droplets during the spraying process, releasing the MoS2 nanoparticles onto the surface of the superhard grinding wheel. The conditions, process, and mechanism of secondary atomization of the hydroxyguar gum mixture are quantitatively analyzed to ensure that the secondary atomization process of the hydroxyguar gum mixture is controllable, thus guaranteeing the atomization efficiency and uniform coverage of the grinding wheel surface.

[0034] In the fourth step of the grinding process, the MoS2 nanoparticle molecular layers overlap into a thin layer during the grinding process and form layer curling.

[0035] The layers are rolled up and stacked to form a garnet corrugated structure, which gives MoS2 a certain degree of brittleness and ductility.

[0036] The third step of spraying involves continuously spraying the superhard grinding wheel for 5 minutes, during which a layer of mixed liquid is evenly sprayed onto the inner and outer walls of the superhard grinding wheel.

[0037] The centrifuge operates at 15,000 revolutions per minute, with an internal temperature of 30°C during rotation. MoS2 nanoparticles under high speed and pressure are subjected to force. The physical film formed by the MoS2 nanoparticles under the grinding force stretching on the friction surface affects the grinding efficiency, workpiece surface roughness, and surface / subsurface damage, thereby achieving the characteristics of high-speed precision grinding of C / C-SiC materials by superhard abrasive hardness adaptive grinding wheel.

[0038] Specific working principle: such as Figure 1-5 As shown, in the manufacturing method of this superhard abrasive hardness-adaptive grinding wheel, firstly, 65 parts of MoS2 nanoparticles and 35 parts of hydroxyguanidine solution are thoroughly mixed. Due to the anisotropy of the SiCf / SiC composite material, the grinding force generated at different positions of the workpiece varies. The grinding wheel blocks react accordingly to different grinding forces. Subsequently, the mixture flows from the inside of the grinding wheel through the internal channel to the surface of the grinding wheel. The hydroxyguanidine solution, carrying MoS2 nanoparticles, is atomized and broken into small droplets twice during the spraying process, releasing the MoS2 nanoparticles onto the surface of the grinding wheel. These MoS2 nanoparticle molecular layers overlap to form a thin layer during the grinding process. These layers curl and accumulate to form a garnet corrugated structure, giving MoS2 a certain degree of brittleness and ductility. Therefore, under the action of external force, MoS2 nanoparticles can be stretched, forming a physical film on the friction surface. Since the thermal conductivity of MoS2 nanoparticles is low, it can improve the heat transfer performance of the lubricant. Meanwhile, the hydroxyguanethol solution restores viscoelasticity, adsorbs the grinding debris generated between the abrasive grains, and then removes it from the grinding wheel through centrifugal force, improving the surface morphology of the grinding wheel and increasing the grinding efficiency. This is the characteristic of the manufacturing method of the superhard abrasive hardness adaptive grinding wheel.

[0039] The embodiments of the present invention are given for the purposes of illustration and description. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for manufacturing a superhard abrasive hardness adaptive grinding wheel, characterized in that, Includes the following steps: Step 1: Prepare 65 parts of MoS2 nanoparticles and 35 parts of hydroxyguanylic acid solution, and then thoroughly mix the MoS2 nanoparticles and hydroxyguanylic acid solution to prepare a mixture. The preparation of the MoS2 nanoparticles and hydroxyguanosine solution requires maintaining a temperature of 25°C, and continuous stirring for 30 minutes is also required during the preparation of the MoS2 nanoparticles and hydroxyguanosine solution. The hydroxyguanethidine solution encapsulates MoS2 nanoparticles, which are atomized and broken into small droplets twice during the spraying process, releasing the MoS2 nanoparticles onto the surface of the superhard grinding wheel. Step 2: Add the mixture prepared in Step 1 into the spraying machine; The third step is to place the superhard grinding wheel on the spraying machine from the second step and clamp it in place. Then, start the spraying machine and spray the mixture evenly onto the outer wall of the superhard grinding wheel. The fourth step is to place the coated superhard grinding wheel on a grinding machine for grinding after the coating is applied in the third step. In the fourth step of the grinding process, the MoS2 nanoparticle molecular layers overlap into a thin layer and form layer curl during the grinding process; The layers are rolled up and stacked to form a garnet corrugated structure, which gives MoS2 a certain degree of brittleness and ductility. Fifth step: After grinding is completed, place the superhard grinding wheel on a centrifuge and start the centrifuge to drive the superhard grinding wheel to rotate. This will cause the mixture to spread on the superhard grinding wheel, thus completing the manufacturing of the hard abrasive self-adaptive grinding wheel. The centrifuge operates at 15,000 revolutions per minute, and its internal temperature is 30°C during operation.

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