Electrolytic dressing device and method for super-fine grain high-profile metal bond diamond grinding wheel

Abstract

The application discloses an electrolytic dressing device and method for superfine-grit high-stability metal-based diamond grinding wheel, and the device comprises an electrolytic tank, an electric sliding table arranged in the electrolytic tank and an ionization ion purification device; the upper and lower supporting plates of the electric sliding table are adjustable and are fixed through clamps; the clamps can be used for positioning the grinding wheel to be electrolyzed; a driving motor for driving the grinding wheel to rotate is further arranged on the grinding wheel; the electrolyte in the electrolytic tank is filtered and adsorbed by the ionization ion purification device; the ionization ion purification device can filter and adsorb the ions and impurities electrolyzed in time, so that the electrolyte maintains stable PH, and a stable environment is provided for uniform electrolytic dressing; and the electrolytic dressing method can efficiently and high-quality dress the superfine-grit diamond grinding wheel through grinding wheel pretreatment, grinding wheel pre-cleaning treatment, grinding wheel electrolysis and electrolytic impurity removal, and the exposed height of the diamond is greater than or equal to 1 / 3D 金刚石尺寸 , and the grinding efficiency is improved by about 20% relative to mechanical dressing grinding wheels.

Description

Technical Field

[0001] This invention belongs to the field of grinding and polishing technology in machining, and specifically relates to an electrolytic sharpening device and method for ultrafine-grained high-form-retention metal diamond grinding wheels. Background Technology

[0002] Ultra-precision machining technology is an advanced manufacturing technology developed to meet the demands of high-precision machining. Single-point diamond grinding, as one of the ultra-precision machining technologies, can achieve nanometer and submicron precision machining of workpieces, and has a wide and urgent demand in many fields such as precision optics, aerospace, medical prostheses, precision instruments, and satellite communications. High-precision, fine-grained diamond grinding wheels for diamond tool grinding are key precision tools in single-point diamond machining technology research, and their technological advancement is crucial. Foreign countries maintain strict secrecy regarding the manufacturing and processing technology of grinding wheels for single-crystal tool grinding, while related research and manufacturing in my country is currently in the experimental stage. Therefore, detailed technical breakthroughs in the manufacturing and processing technology of these grinding wheels are urgently needed.

[0003] Single-crystal cutting tools can achieve nanometer-level precision in their cutting edge. Therefore, the morphological precision requirements for their matching diamond grinding wheels are extremely high. In order to ensure grinding efficiency and processing effect, diamond sharpening is required before use. 800-grit grinding wheels are well sharpened using grinding machinery, but 3000# and 10000# grinding wheels cannot effectively sharpen diamonds through grinding and grinding wheel-to-wheel grinding, and the efficiency is low. Therefore, an efficient and high-quality sharpening method for ultra-fine-grained, high-shape-preserving metal grinding wheels is essential. The invention disclosed in CN120791664A discloses a method for manufacturing a grinding wheel for highly uniform and easily repairable single-crystal diamond tools. The method includes steps such as wet mixing, tape casting, laser cutting, lamination, substrate surface treatment, integrated sintering, dimensional machining, and sharpening, ultimately forming a grinding wheel with a total abrasive layer thickness of 7 mm-15 mm. The grinding wheel layer is formed by cross-laminating a and b plates, with the diamond height at the junction of a and b plates tending to be consistent. Compared to direct feeding and sintering, this method offers better diamond edge height and flatness. Furthermore, by selecting a suitable binder, a porous structure can be designed for the a plate, further improving dressing efficiency and indirectly enhancing the processing quality and efficiency of the diamond tool. The invention mentions a method for manufacturing grinding wheels for single-crystal tools, indirectly mentioning the grinding wheel sharpening process, which mainly involves using different types of abrasive grains for double-end grinding. This not only results in low grinding efficiency but also fails to effectively sharpen fine-grained diamond grinding wheels.

[0004] The invention disclosed in CN113618642A is a heavy-duty grinding wheel sharpening device and method. The sharpening device includes a housing, a rotary table system, a sandblasting system, a recovery system, and an environmentally friendly dust collection system. It uses an air source to drive the sharpening abrasive, while the grinding wheel to be sharpened rotates at a uniform speed under the action of the rotary table system. This causes the sharpening abrasive to be sprayed at high speed onto the working surface of the grinding wheel. The high-speed sprayed abrasive quickly removes the organic polymer resin binder solidified on the working surface, exposing the abrasive grains on the working surface for grinding. Cutting: This method uses an air source to drive the abrasive, causing it to be sprayed at high speed onto the surface of the grinding wheel, thereby removing the resin binder in the grinding wheel. However, the abrasive grains are relatively large, and the binder is resin, which has lower strength and toughness than metal. It can be removed by high-speed abrasive flow. Metal binders have higher toughness, and high-speed abrasive spraying cannot effectively remove them. Diamond has a high bonding strength with metal, making it impossible to effectively separate the abrasive grains from the binder. In addition, the sandblasting method has poor precision and cannot meet the high precision requirements of 3000# and 10000# surfaces.

[0005] Precision sharpening technology for ultra-fine particle size high-precision metal-bonded diamond grinding wheels has always been a key technology restricting the efficient and high-precision machining of grinding wheels, indirectly affecting the mirror polishing accuracy of optical components. At present, the sharpening accuracy and sharpening efficiency of the sharpening methods cannot simultaneously meet the requirements of grinding wheel use. Therefore, there is an urgent need for a suitable high-precision sharpening method for metal-bonded grinding wheels. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of the prior art by providing an electrolytic sharpening device and method for ultra-fine particle size high-precision metal-based diamond grinding wheels. This method combines electrolysis technology with metal-based fine particle size grinding wheel sharpening to provide high-performance grinding wheel tools for subsequent hard material processing and grinding.

[0007] To solve the above technical problems, the technical solution adopted by the present invention is as follows: An electrolytic grinding device for ultra-fine particle size high-quality metal-coated diamond grinding wheels includes an electrolytic cell and an electric slide table and an ionization purification device arranged in the electrolytic cell. The upper and lower support plates of the electric slide table are adjustable and fixed by the provided clamps. The clamps can be used to position the grinding wheel to be electrolyzed. The grinding wheel is also equipped with a drive motor for driving its rotation. The ionization purification device filters and adsorbs the electrolyte in the electrolytic cell; The volume percentages of each component in the electrolyte are as follows: phosphoric acid 45%-60%, sulfuric acid 15%-25%, pure water 35%-45 vol, corrosion inhibitor glycerol 1%-3%, and the pH value of the electrolyte is 5-6.

[0008] The ionization purification device includes a capacitor and a water pump, and the capacitor voltage is 1~2V.

[0009] The electrolytic cell is an insulated and corrosion-resistant electrolytic cell, and the clamp material is TC4 with a clamp diameter range of 70-100mm.

[0010] The drive motor is a low-voltage DC servo motor, and the fixture is a non-contact, top-bottom aligned positioning fixture with a positioning accuracy of 0.005-0.01mm.

[0011] A method for electrolytic sharpening of ultrafine-grained, high-precision metal-based diamond grinding wheels includes the following steps: (1) Grinding wheel pretreatment First, a surface grinder is used to perform preliminary finishing on the abrasive layer of the grinding wheel to achieve a flatness of less than 0.01 mm. Subsequently, a precision double-end grinding machine was used to process the surface microstructure of the abrasive layer of the grinding wheel, so that the flatness of the grinding wheel reached within 0.005 µm. (2) Grinding wheel pre-cleaning treatment Use an ultrasonic cleaner to clean the grinding wheel, remove residual impurities from the surface of the abrasive layer, and then heat and dry it after cleaning. (3) Grinding wheel electrolysis a. Assemble the anode and cathode and the electrolytic circuit. Use the abrasive layer of the grinding wheel after cleaning in step (2) as the anode and stainless steel as the cathode. Ensure that the anode and cathode samples are the same size and position them to ensure that the anode and cathode are concentric. b. Provide insulation protection for the edge and core of the anode sample, determine the voltage, and adjust the current to achieve a suitable current density; c. During electrolysis, the anode sample is positioned at the top, the distance between the anode and cathode is 30-50 mm, the voltage range is 6-12 V, and the current density is 2.5 A-3.5 A / dm³. 2 The solution temperature should be controlled between 20-30℃; The electrolysis time is 400-480s.

[0012] (4) Electrolytic impurity removal After electrolysis, rinse with deionized water for 3-5 minutes and clean the surface with a cleaning agent. Then, perform ultrasonic cleaning with water and anhydrous ethanol respectively, using the same process parameters as the pretreatment, and then blow dry. (5) Sample characterization test The morphology of the sample obtained in step (4) was observed, and the grinding efficiency was compared on the grinding machine.

[0013] The electric slide is made of TC4 and has been treated with an insulating and corrosion-resistant coating.

[0014] In step (1), the grinding wheel used for surface grinding is a ceramic-based diamond grinding wheel, the grinding speed of the double end face is 15~20 rpm, the pressure is 40-60 Kg, the abrasive is green silicon carbide, and the size is W10-W20.

[0015] In step (2), the ultrasonic cleaning frequency of the ultrasonic cleaner is 70-90 Hz, the cleaning time is 7-10 min, and it is cleaned with distilled water and anhydrous ethanol respectively.

[0016] The cathode is made of 304 stainless steel and is ultrasonically cleaned before electrolysis. The edges and inner side of the cathode sample are insulated and protected with paraffin wax.

[0017] The beneficial effects of this invention are: (1) This invention discloses an electrolytic sharpening device and method for ultrafine-grained high-quality metallic diamond grinding wheels. The device includes an electrolytic cell and an electric slide table and an ionization purification device arranged in the electrolytic cell. The upper and lower support plates of the electric slide table are adjustable and fixed by a clamp. The clamp can be used to position the grinding wheel to be electrolyzed. The grinding wheel is also equipped with a drive motor for driving its rotation. The ionization purification device filters and adsorbs the electrolyte in the electrolytic cell. The drive motor drives the grinding wheel sample to rotate and position. While effectively improving the uniformity of anodic electrolysis, it can remove impurities on the anode surface in time. The ionization purification device can filter and adsorb the electrolyzed ions and impurities in time, so that the electrolyte maintains a stable pH and provides a stable environment for uniform electrolytic sharpening. The electrolytic sharpening method, through grinding wheel pretreatment, grinding wheel pre-cleaning treatment, grinding wheel electrolysis and removal of electrolytic impurities, can perform efficient and high-quality sharpening of ultrafine-grained diamond grinding wheels, with a diamond exposure height ≥1 / 3D. 金刚石尺寸 Its grinding efficiency is about 20% higher than that of mechanically sharpened grinding wheels.

[0018] (2) The insulating and corrosion-resistant electrolytic cell and related fixtures provide a stable and reliable electrolytic reaction environment. The electric slide can control the distance between the anode and cathode at the micrometer level and can adjust the reaction rate at any time.

[0019] (3) The exposed diamond height of the sharpened diamond is higher than that of the mechanically sharpened diamond. Compared with the diamond height of the abrasive layer after the mechanical sharpening of the 3000# copper-tin base grinding wheel, the exposed diamond height of the mechanically sharpened diamond is generally in the range of 0.5-3mm, while that of the electrolytically sharpened diamond is in the range of 1.5-4mm.

[0020] (4) The blade height and surface morphology are controllable. The surface roughness, parallelism and blade height can be adjusted by changing the current density, electrolysis time and electrolyte formula, and can be adapted to actual needs. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 These are comparison images of the morphology of electrolytic and mechanical sharpening of grinding wheels; Table 1 shows a comparison of the diamond exposure height of the grinding wheel and the grinding rate. Detailed Implementation

[0022] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0023] This invention provides an electrolytic sharpening device and method for ultrafine-grained, high-form-retention metal-based diamond grinding wheels, such as... Figure 1 and Figure 2 As shown.

[0024] The ultrafine-grained high-quality metal-coated diamond grinding wheel electrolytic sharpening device includes an electrolytic cell 1, an electric slide 2 and an ionization purification device 3 arranged in the electrolytic cell 1. The upper and lower support plates of the electric slide are adjustable and fixed by the provided clamps 4. The clamps 4 can be used to position the grinding wheel 5 to be electrolyzed. The grinding wheel 5 is also equipped with a drive motor 6 for driving its rotation. The ionization purification device 3 filters and adsorbs the electrolyte in the electrolytic cell.

[0025] The volume percentages of each component in the electrolyte are as follows: phosphoric acid (85%, industrial grade) 45%-60%, sulfuric acid (98%, industrial grade) 15%-25%, pure water 35%-45 vol%, and corrosion inhibitor glycerol 1%-3%. The pH value of the electrolyte is 5-6. This ratio of sulfuric acid and glycerol can effectively alleviate pitting corrosion of the highly active Fe phase and effectively improve polishing quality.

[0026] In this embodiment, the ion purification device includes a capacitor and a water pump 31. The capacitor voltage is 1~2V and the distance is 3cm. The water pump has an operating voltage of 24V, 50W, a pipe diameter of 5cm, and is made of polytetrafluoroethylene.

[0027] The drive motor is a low-voltage DC servo motor with a working voltage of 24V and a frequency of 50-60Hz. It has IP54 or higher protection and the motor surface has an anti-corrosion coating. The fixture is a fixture with non-contact upper and lower alignment positioning function and a positioning accuracy of 0.005-0.01mm.

[0028] The electrolytic cell 1 is an insulated and corrosion-resistant electrolytic cell with dimensions ranging from 200 to 400 mm. The clamps are made of TC4 material with a diameter range of 70-100 mm. The electrolytic slide is also made of TC4 and undergoes an insulated and corrosion-resistant coating treatment, which can be made of epoxy resin or polyurethane coating. This electrolytic cell, through its anti-corrosion coating treatment, effectively ensures the positioning accuracy of the anode and cathode and the uniformity of the electric field distribution. Simultaneously, the ionization purification device effectively adsorbs ionized ions and impurities in the solution, effectively ensuring the conductivity and uniformity of the solution.

[0029] A method for electrolytic sharpening of ultrafine-grained, high-precision metal-based diamond grinding wheels includes the following steps: (1) Grinding wheel pretreatment First, a surface grinder is used to perform preliminary finishing on the abrasive layer of the grinding wheel to achieve a flatness of less than 0.01 mm. Subsequently, a precision double-end grinding machine was used to process the surface microstructure of the abrasive layer of the grinding wheel, so that the flatness of the grinding wheel reached within 0.005 µm. The grinding wheel used in the surface grinding is a ceramic-based diamond grinding wheel, with double-end grinding, a rotation speed of 15 rpm, a pressure of 40-60Kg, and the abrasive is green silicon carbide with a size of W10-W20.

[0030] (2) Grinding wheel pre-cleaning treatment The grinding wheel is cleaned using an ultrasonic cleaner to remove residual impurities from the surface of the abrasive layer. After cleaning, it is heated and dried. During ultrasonic cleaning, the cleaning frequency of the ultrasonic cleaner is 70-90 Hz and the cleaning time is 7-10 min. Distilled water and anhydrous ethanol are used for cleaning, which can effectively remove impurities and oil stains from the grinding surface, thereby improving the uniformity of electrolysis and the surface smoothness, and providing favorable conditions for subsequent electrolysis.

[0031] (3) Grinding wheel electrolysis a. Assemble the anode and cathode and the electrolytic circuit. Use the abrasive layer of the grinding wheel after cleaning in step (2) as the anode and stainless steel as the cathode. Ensure that the anode and cathode samples are the same size and position them to ensure that the anode and cathode are concentric. In this embodiment, the cathode 11 is made of 304 stainless steel. The cathode gains electrons, and stainless steel is also corrosion resistant and will not introduce new elements to disrupt the stability of the electrolyte. The cathode plate is exactly the same size as the anode grinding wheel layer. Ultrasonic cleaning is used before electrolysis, and paraffin is used to insulate and protect the edges of the cathode sample and the inner side of the ring to prevent excessive discharge at the edges. b. Provide insulation protection for the edge and core of the anode sample, determine the voltage, and adjust the current to achieve a suitable current density; c. During electrolysis, the anode sample is positioned at the top, and the distance between the anode and cathode is 30-50 mm; during electrolysis, the voltage range is 6-12 V, and the current density is 2.5 A-3.5 A / dm³. 2 The solution temperature is controlled between 20-30℃, and the electrolysis time is 400-480s; (4) Electrolytic impurity removal After electrolysis, rinse with deionized water for 3-5 minutes to remove electrolyte residue from the surface, and then use a copper-tin alloy cleaner to clean the surface and remove impurities that adhered and attached during the electrolysis process. Subsequently, perform ultrasonic cleaning with water and anhydrous ethanol respectively, with the same process parameters as the pretreatment, and then blow dry. In this embodiment, the ultrasonic process has the following parameters: frequency: 60-80Hz, time: 15 minutes.

[0032] (5) Sample characterization test The morphology of the samples obtained in step (4) was observed, and the grinding efficiency was compared on a grinding machine. The surface morphology was observed by field emission at a voltage of 5-8 kV and a beam size of 8 nm; the surface roughness was measured using a white light interferometer; and the diamond tip height was measured using an optical confocal microscope. The grinding rate was tested on a PG4 automatic grinding machine with an R2 tool, a rotation speed of 8000 rpm, and a grinding time of 30 min. Figure 2 As shown in Figure 3000#, the sharpening effect comparison is shown. The grinding efficiency and diamond protrusion height are shown in Table 1. The diamond protrusion height of electrolytic sharpening is significantly higher than that of mechanical sharpening, and the sharpening time is reduced by more than half compared with ordinary mechanical sharpening.

[0033] Table 1: Comparison of diamond exposure height and grinding speed in grinding wheels The following detailed description is provided in conjunction with specific embodiments: An electrolytic sharpening device and method for single-crystal diamond tool grinding with ultra-fine particle size and high conformal diamond grinding wheel is disclosed. The abrasive layer is composed of a mixture of copper powder, tin powder, iron powder, tungsten carbide powder, and diamond, sintered together. The diamond particle size is 3-6 µm, the diamond volume fraction is 25%, the abrasive layer density reaches over 99%, and the hardness is 80-90 HRB. The overall electrolytic steps are as follows: 1. Grinding wheel profile pretreatment First, a surface grinder is used to perform preliminary finishing on the abrasive layer. The grinding wheel speed is 300 rpm and the feed is 0.02 mm. When the thickness is close to the target, the feed is reduced to 0.01 mm, so that the flatness of the grinding wheel can be within 0.01 mm. Subsequently, the surface microstructure of the abrasive layer of the grinding wheel was treated using a precision double-end grinding machine. The free abrasive used was green silicon carbide with a diameter of 5-15 µm. The pressure was 50-80 Kg, the rotation speed was 30 rpm, and the time was 30 min. After grinding, the wheel was dried with an air gun to prevent it from rusting. The final flatness of the grinding wheel was 0.003 µm.

[0034] 2. Grinding wheel pre-cleaning treatment The sample was cleaned using an ultrasonic cleaner to remove residual silicon carbide and some other impurities from the surface of the abrasive layer. The ultrasonic cleaning media were pure water and anhydrous ethanol, with a frequency of 60-80 Hz and a time of 5-10 min. After cleaning, the sample was dried using a heating table for 5-10 min.

[0035] 3. Specific electrolysis process for grinding wheels The abrasive layer of the grinding wheel serves as the anode, and the cathode is made of 304 stainless steel. The anode and cathode samples are kept to the same size. Non-contact positioning ensures concentricity between the anode and cathode. A soft PTFE separator is used to shield the anode circumference to prevent excessive electrolysis at the edges. The separator is 3mm above the abrasive layer, the distance between the anode and cathode is 7-10mm, the voltage is 6-8V, and the current density is 3A / dm³. 3 The electrolysis time is 6 minutes. The connecting wire used for the anode is TC4 wire with a diameter of φ1mm, and the wire used for the cathode is stainless steel wire with a diameter of φ1mm. The contact points of the wires are wrapped with insulating tape to prevent them from affecting the electric field.

[0036] 4. Electrolytic impurity removal After electrolysis, rinse with deionized water for 3-5 minutes, clean the surface with copper-tin alloy cleaner, and then perform ultrasonic cleaning with water and anhydrous ethanol respectively, with the same process parameters as the pretreatment. Finally, blow the sample dry with an air gun.

[0037] 5. Sample characterization tests Microstructure observation was performed using a Thermo Fisher Scientific field emission scanning electron microscope (FESEM) at 5 kV, an electron beam of 8 nm, and a magnification of 2500x. The diamond protrusion height was measured using a Keyence super depth-of-field microscope; the average protrusion height of 50 diamonds was taken, and the measured value was 2.16 µm. Roughness was measured using a white light interferometer, and the roughness Ra = 0.63 µm. The flatness of the grinding wheel was checked using a coordinate measuring machine (CMM), and its flatness was 0.003 mm, showing no significant change from before electrolysis. The grinding rate was tested using a PG4 automatic tool grinder, and the grinding rate was 2.1 µm / min.

[0038] This invention achieves a highly efficient and stable electrolytic sharpening device by designing the cathode material, electrolyte composition, corrosion-resistant fixture structure, and sample position. Simultaneously, through the sharpening process, it completes high-quality sharpening of fine-grained copper-tin composite phase grinding wheels. Compared with current sharpening methods and processes, the sharpening efficiency is higher than that of mechanical sharpening. The sharpening time of ordinary flat grinding + double-end face grinding is 30-60 minutes, while the sharpening time of flat grinding + electrolysis is about 15 minutes, which saves more than half of the sharpening time compared to ordinary mechanical sharpening.

[0039] If this patent uses terms such as "first" and "second" to define components, those skilled in the art should know that the use of "first" and "second" is merely for the convenience of describing the invention and simplifying the description, and the above terms have no special meaning.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this invention is defined by the appended claims and their equivalents.

[0041] In the description of this invention, it should be understood that the terms "front", "rear", "left", "right", "center", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of this invention and to simplify 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. Therefore, they should not be construed as limiting the scope of protection of this invention.

Claims

1. An electrolytic sharpening device for ultra-fine particle size high-precision metal-based diamond grinding wheels, characterized in that: It includes an electrolytic cell and an electric slide table and an ion purification device installed in the electrolytic cell. The upper and lower support plates of the electric slide table are adjustable and fixed by the provided clamps. The clamps can be used to position the grinding wheel to be electrolyzed. The grinding wheel is also equipped with a drive motor for driving its rotation. The ionization purification device filters and adsorbs the electrolyte in the electrolytic cell; The volume percentages of each component in the electrolyte are as follows: phosphoric acid 45%-60%, sulfuric acid 15%-25%, pure water 35%-45 vol, corrosion inhibitor glycerol 1%-3%, and the pH value of the electrolyte is 5-6.

2. The ultra-fine particle size high-precision metal-based diamond grinding wheel electrolytic sharpening device according to claim 1, characterized in that: The ionization purification device includes a capacitor and a water pump, and the capacitor voltage is 1~2V.

3. The electrolytic sharpening device for ultrafine particle size high-precision metal-based diamond grinding wheels according to claim 1, characterized in that: The electrolytic cell is an insulated and corrosion-resistant electrolytic cell, and the clamp material is TC4 with a clamp diameter range of 70-100mm.

4. The ultra-fine particle size high-precision metal-based diamond grinding wheel electrolytic sharpening device according to claim 1, characterized in that: The drive motor is a low-voltage DC servo motor, and the fixture is a non-contact, top-bottom aligned positioning fixture with a positioning accuracy of 0.005-0.01mm.

5. The method for electrolytic sharpening of ultrafine-grained high-precision metal-based diamond grinding wheels according to any one of claims 1 to 4, characterized in that, Includes the following steps: (1) Grinding wheel pretreatment First, a surface grinder is used to perform preliminary finishing on the abrasive layer of the grinding wheel to achieve a flatness of less than 0.01 mm. Subsequently, a precision double-end grinding machine was used to process the surface microstructure of the abrasive layer of the grinding wheel, so that the flatness of the grinding wheel reached within 0.005 µm. (2) Grinding wheel pre-cleaning treatment Use an ultrasonic cleaner to clean the grinding wheel, remove residual impurities from the surface of the abrasive layer, and then heat and dry it after cleaning. (3) Grinding wheel electrolysis a. Assemble the anode and cathode and the electrolytic circuit. Use the abrasive layer of the grinding wheel after cleaning in step (2) as the anode and stainless steel as the cathode. Ensure that the anode and cathode samples are the same size and position them to ensure that the anode and cathode are concentric. b. Provide insulation protection for the edge and core of the anode sample, determine the voltage, and adjust the current to achieve a suitable current density; c. During electrolysis, the anode sample is positioned at the top, the distance between the anode and cathode is 30-50 mm, the voltage range is 6-12 V, and the current density is 2.5 A-3.5 A / dm³. 2 The solution temperature should be controlled between 20-30℃; The electrolysis time is 400-480 seconds; (4) Electrolytic impurity removal After electrolysis, rinse with deionized water for 3-5 minutes and clean the surface with a cleaning agent. Then, perform ultrasonic cleaning with water and anhydrous ethanol respectively, using the same process parameters as the pretreatment, and then blow dry. (5) Sample characterization test The morphology of the sample obtained in step (4) was observed, and the grinding efficiency was compared on the grinding machine.

6. The method for electrolytic sharpening of ultrafine-grained high-precision metal-based diamond grinding wheels according to claim 5, characterized in that: The electric slide is made of TC4 and has been treated with an insulating and corrosion-resistant coating.

7. The method for electrolytic sharpening of ultrafine-grained high-precision metal-based diamond grinding wheels according to claim 5, characterized in that: In step (1), the grinding wheel used for surface grinding is a ceramic-based diamond grinding wheel, the grinding speed of the double end face is 15~20 rpm, the pressure is 40-60 Kg, the abrasive is green silicon carbide, and the size is W10-W20.

8. The method for electrolytic sharpening of ultrafine-grained high-precision metal-based diamond grinding wheels according to claim 5, characterized in that: In step (2), the ultrasonic cleaning frequency of the ultrasonic cleaner is 70-90 Hz, the cleaning time is 7-10 min, and it is cleaned with distilled water and anhydrous ethanol respectively.

9. The method for electrolytic sharpening of ultrafine-grained high-form-retention metal-based diamond grinding wheels according to claim 5, characterized in that: The cathode is made of 304 stainless steel and is ultrasonically cleaned before electrolysis. The edges and inner side of the cathode sample are insulated and protected with paraffin wax.

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