Grinding device and processing method using ultrasonic electrolytic grinding wheel

Abstract

The application belongs to the field of ultrasonic electrolytic grinding and provides a grinding device and processing method using an ultrasonic electrolytic grinding wheel, comprising an ultrasonic vibration assembly and an ultrasonic vibration transducer, wherein the ultrasonic vibration assembly comprises a rotating shaft, an assembling plate, a grinding wheel disc and a plurality of cathode electrolytic pieces; the assembling plate is arranged on the rotating shaft, the grinding wheel disc is connected to the assembling plate, the plurality of cathode electrolytic pieces are annularly and equidistantly distributed at the circumference of the grinding wheel disc and are movably embedded into the assembling plate, and the ultrasonic vibration transducer is connected to the cathode electrolytic pieces. Compared with the prior art, the application has the advantages that by organically combining electrolytic processing and ultrasonic processing, the electrolytic voltage, the ultrasonic vibration frequency and amplitude, the rotating speed of the grinding wheel disc and the liquid injection pressure are accurately controlled, under the synergistic work of the high-frequency impact of ultrasonic vibration and electrolysis, the defects such as surface burn, scratch and crack in traditional grinding are effectively avoided, and the overall high-precision and high-surface-quality processing is achieved.

Description

Technical Field

[0001] This invention belongs to the field of ultrasonic electrolytic grinding, specifically relating to a grinding device and processing method using an ultrasonic electrolytic grinding wheel. Background Technology

[0002] Electrolytic machining is a special machining and manufacturing method based on the principle of electrochemical anodic dissolution, which uses a reasonably shaped cathode to form the workpiece. The machining process is not limited by the hardness of the material and has the advantages of no cutting force, no wear and tear on machining tools, and wide adaptability.

[0003] While traditional electrolytic grinding has achieved some success, it still has many shortcomings:

[0004] 1. High temperature damage: In the traditional grinding process, the intense friction between the grinding wheel and the workpiece generates a lot of heat, causing the surface temperature of the workpiece to rise sharply. This high temperature may not only cause burns on the workpiece surface and generate residual stress, but also affect the fatigue life and performance of the workpiece.

[0005] 2. Low material removal rate: Because traditional grinding technology relies on physical cutting forces for material removal, its material removal efficiency is relatively low. This significantly increases processing time and reduces production efficiency when handling large-sized or high-strength materials.

[0006] 3. Rapid wear of grinding wheels: Frequent physical contact causes rapid wear of the grinding wheel, shortening its service life and increasing the cost of replacement and maintenance.

[0007] 4. Unstable surface quality: Although traditional grinding can achieve a certain surface finish, it is prone to surface scratches, cracks and other defects, especially when processing cemented carbide or ceramic materials, these problems are more prominent. Summary of the Invention

[0008] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by the present invention is to propose a grinding device and processing method using an ultrasonic electrolytic grinding wheel that can achieve precise control of material removal rate, processing accuracy and surface quality.

[0009] The technical solution adopted by this invention to solve its technical problem is to propose a grinding device using an ultrasonic electrolytic grinding wheel, comprising: an ultrasonic vibration assembly and an ultrasonic vibration transducer, wherein the ultrasonic vibration assembly includes a rotating shaft, a mounting plate, a grinding wheel disk, and several cathode electrolytic plates; wherein,

[0010] The assembly plate is mounted on the rotating shaft, the grinding wheel is connected to the assembly plate, a plurality of cathode electrolytic plates are distributed in a ring at equal intervals around the circumference of the grinding wheel and are movably embedded in the assembly plate, and the ultrasonic vibration transducer is connected to the cathode electrolytic plates.

[0011] The device includes a supply chamber and a storage chamber. The supply chamber is formed inside the rotating shaft and is connected to the outside. The storage chamber is distributed in a ring at equal intervals around the circumference of the grinding wheel. One end of the storage chamber is connected to the supply chamber through a connecting channel, and the other end opens outward from the grinding wheel, so that the electrolyte can flow through the supply chamber to the connecting channel and be sprayed outward from the storage chamber.

[0012] Machine tool spindle, used to clamp an anode workpiece that can be connected to a pulse power supply.

[0013] In the above-mentioned grinding device using an ultrasonic electrolytic grinding wheel, there are several sets of symmetrically arranged bent portions around the circumference of the grinding wheel. The bent portions and the grinding wheel together form an anti-detachment groove. The mounting plate has a locking groove, and the anti-detachment groove and the locking groove are interconnected to confine the cathode electrolytic plate inside.

[0014] In the above-mentioned grinding device using an ultrasonic electrolytic grinding wheel, a bending channel and a liquid spraying hole are provided in the bending part. The bending channel is used to connect the storage cavity and the liquid spraying hole. The liquid spraying hole is set at an angle to the tangential direction of the bending channel, and the opening of the liquid spraying hole faces outward from the grinding wheel disk.

[0015] In the above-mentioned grinding device using an ultrasonic electrolytic grinding wheel, the angle between the opening direction of the liquid spray hole and the tangential direction of the grinding wheel is 45 degrees.

[0016] In the above-mentioned grinding device using an ultrasonic electrolytic grinding wheel, the intersection point of the opening directions of the two symmetrical spray holes is located outside the grinding wheel disk.

[0017] In the above-mentioned grinding apparatus using an ultrasonic electrolytic grinding wheel, the cathode electrolytic plate is coated with 96% alumina insulating material.

[0018] In the above-mentioned grinding device using an ultrasonic electrolytic grinding wheel, the grinding wheel includes an electrolyte inlet disc and a plastic negative electrode piezoelectric ceramic sheet. An extension groove communicating with the storage cavity is formed in the electrolyte inlet disc, and a through groove is formed on the plastic negative electrode piezoelectric ceramic sheet. The extension groove and the through groove together form the connecting channel. The inner and outer walls of the plastic negative electrode piezoelectric ceramic sheet are respectively interference-fitted to the rotating shaft and the electrolyte inlet disc, such that one end of the through groove is connected to the storage cavity and the other end is connected to the liquid supply cavity.

[0019] In the above-mentioned grinding device using an ultrasonic electrolytic grinding wheel, the electrolyte is 10% sodium chloride or 10% sodium nitrate.

[0020] In the above-mentioned grinding device using an ultrasonic electrolytic grinding wheel, a four-jaw fixed tray is provided on the machine tool spindle, and the ultrasonic vibration transducer and the four-jaw fixed tray are both controlled by the same control system.

[0021] The technical solution adopted by this invention to solve its technical problem is to also propose a grinding process method, including the following steps:

[0022] S1. The anode workpiece is clamped on the inner / outer wall by a four-jaw fixed tray to limit its shaking;

[0023] S2. Select cathode electrolytic plates with conductivity and strength, such as copper or aluminum, and embed them in the anti-detachment groove and locking groove;

[0024] S3. The electrolyte flows from the supply chamber to the storage chamber through the connecting channel inside the grinding wheel.

[0025] S4. When the cathode electrolytic plate of the ultrasonic vibration transducer is connected to the anode workpiece and energized, the rotating shaft drives the ultrasonic vibration transducer to generate an amplitude between the anode workpiece and the transducer. At the same time, the electrolyte intersects at 45 degrees above the spray hole and is sprayed into the grinding area.

[0026] S5. Introduce nitrogen or carbon dioxide into the grinding wheel to promote the electrolysis reaction and use the gas flow to remove the heat and impurities generated during electrolysis.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] (1) The present invention discloses a grinding device and processing method using an ultrasonic electrolytic grinding wheel. By organically combining electrolytic processing, ultrasonic processing, and grinding processing, it precisely controls the electrolytic voltage, ultrasonic vibration frequency and amplitude, grinding wheel rotation speed, and liquid spray pressure. Under the synergistic effect of high-frequency impact from ultrasonic vibration and electrolytic action, it effectively avoids defects such as surface burns, scratches, and cracks that occur in traditional grinding, thereby achieving high-precision and high-surface-quality processing. Moreover, this processing method reduces grinding wheel wear, extends its service life, and lowers processing costs.

[0029] (2) The flow of gas carries away the heat and impurities generated by electrolysis, effectively avoiding thermal damage and contamination on the surface of the workpiece, making the surface of the polished workpiece smoother and cleaner, and greatly improving the effect and quality of the polishing process.

[0030] (3) The spray pressure, flow rate and direction of the electrolyte can be flexibly adjusted according to different processing needs to adapt to the processing requirements of diverse workpiece materials and shapes. Attached Figure Description

[0031] Figure 1 This is a perspective view of this application;

[0032] Figure 2 yes Figure 1 Exploded view of the local structures within the middle section;

[0033] Figure 3 yes Figure 1 Schematic diagram of the cross section at point AA;

[0034] Figure 4 yes Figure 1 Schematic diagram of the cross section at point BB;

[0035] Figure 5 yes Figure 4 A magnified view of a section at point C.

[0036] In the diagram, 1 is the rotating shaft; 10 is the liquid supply chamber; 11 is the electrolyte pouring port; 2 is the assembly plate; 20 is the locking groove; 3 is the grinding wheel; 30 is the electrolyte inlet plate; 31 is the plastic negative electrode piezoelectric ceramic sheet; 320 is the storage chamber; 321 is the connecting channel; 321a is the extension groove; 321b is the through groove; 33 is the bending part; 330 is the anti-detachment groove; 331 is the bending channel; 332 is the spray hole; 4 is the cathode electrolytic plate; 5 is the four-claw fixing tray; and 50 is the anode workpiece. Detailed Implementation

[0037] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings to further illustrate the technical solutions of the present invention. However, the present invention is not limited to these embodiments.

[0038] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0039] Example 1:

[0040] like Figures 1 to 5As shown, a grinding device using an ultrasonic electrolytic grinding wheel includes: an ultrasonic vibration assembly and an ultrasonic vibration transducer. The ultrasonic vibration assembly includes a rotating shaft 1, an assembly plate 2, a grinding wheel 3, and several cathode electrolytic plates 4. The assembly plate 2 is mounted on the rotating shaft 1, the grinding wheel 3 is connected to the assembly plate 2, and the several cathode electrolytic plates 4 are equidistantly distributed in a ring around the circumference of the grinding wheel 3 and are movably embedded within the assembly plate 2. The ultrasonic vibration transducer is connected to the cathode electrolytic plates 4. A liquid supply chamber 1 is also included. The storage chamber 320 and the liquid supply chamber 10 are formed inside the rotating shaft 1 and are connected to the outside. The storage chamber 320 is distributed in a ring at equal intervals around the circumference of the grinding wheel 3. A connecting channel 321 is formed between one end of the storage chamber 320 and the liquid supply chamber 10, and the other end opens towards the outside of the grinding wheel 3, so that the electrolyte can flow through the liquid supply chamber 10 to the connecting channel 321 and be sprayed from the storage chamber 320 to the outside of the grinding wheel 3. The machine tool spindle is used to clamp the anode workpiece 50 that can be connected to a pulse power supply.

[0041] Specifically, such as Figure 1As shown, in this embodiment, the anode workpiece 50 is a long strip plate made of alumina ceramic or YG15 cemented carbide. It undergoes ultrasonic vibration electrolytic machining with an outer diameter of 50mm-100mm. To achieve the aforementioned high-frequency ultrasonic vibration, it mainly consists of an ultrasonic generator and an ultrasonic vibration transducer. The ultrasonic generator can generate a high-frequency electrical signal with a precisely adjustable frequency in the range of 10-50kHz. This electrical signal is transmitted to the ultrasonic transducer via a cable. The ultrasonic vibration transducer converts the input high-frequency electrical signal into mechanical vibration energy based on the piezoelectric effect or magnetostrictive effect. As the anode workpiece 50 to be processed is clamped by the machine tool spindle, its connection to the positive terminal of the pulse power supply is ensured. The ultrasonic vibration transducer is connected to the cathode electrolytic plate 4 (i.e., cathode tool) embedded in the grinding wheel, so that the grinding wheel disk 3 can generate up and down ultrasonic vibration due to the ultrasonic vibration transducer. The assembly plate 2 and the rotating shaft 1 are integrated and rotate synchronously. The cathode tool and the anode workpiece 50 maintain a processing gap of about tens of micrometers. In the device structure of this embodiment, the grinding wheel disk 3 and the rotating shaft 1 are respectively provided with a storage cavity 320 and a liquid supply cavity 10. At the same time, the rotating shaft 1 is provided with an electrolyte pouring port 11. The electrolyte enters the storage cavity 320 from the liquid supply cavity 10 (connected to the liquid supply system, not shown in the figure) through the connecting channel 321. Finally, under the action of high speed (rotating shaft 1 rotation speed) and high pressure (total amount of electrolyte), the electrolyte is sprayed into the grinding zone. Therefore, in terms of processing efficiency, relying on electrolysis to soften the workpiece surface and remove some material first, the grinding action of the grinding wheel combined with ultrasonic vibration greatly reduces cutting resistance. Compared with traditional screen grinding processes, the material removal rate can be increased by 60%-120%, significantly shortening processing time and improving production efficiency. At the same time, the high-frequency impact of ultrasonic vibration and the synergistic action of electrolysis avoid defects such as surface burns, scratches, and cracks common in traditional grinding. The surface roughness of the processed workpiece can be as low as Ra0.05 micrometers-Ra0.2 micrometers.

[0042] The grinding wheel 3 has several sets of symmetrically arranged bent portions 33 around its circumference. The bent portions 33 and the grinding wheel 3 together form an anti-detachment groove 330. The mounting plate 2 has a locking groove 20. The anti-detachment groove 330 and the locking groove 20 are interconnected to confine the cathode electrolytic plate 4 inside it.

[0043] like Figures 3 to 5 As shown, in this embodiment, eight sets of bends 33 arranged in a ring are provided. Each set of bends 33 has an anti-detachment groove 330. It is worth noting that the anti-detachment groove 330 is arc-shaped, and together with the engaging groove 20 connected to it, the cathode electrolytic plate 4 can be confined between the anti-detachment groove 330 and the engaging groove 20 (see reference). Figure 1This ensures the stability and positional accuracy of the cathode electrolytic plate 4, effectively preventing it from shifting or falling off during high-speed rotation, thus guaranteeing the smoothness and stability of ultrasonic vibration grinding.

[0044] The bent section 33 has a curved channel 331 and a spray hole 332. The curved channel 331 is used to connect the storage cavity 320 and the spray hole 332. The spray hole 332 is set at an angle to the tangent direction of the curved channel 331, and the opening of the spray hole 332 faces outward from the grinding wheel 3.

[0045] Preferably, such as Figures 3 to 5 As shown, the electrolyte supply pump (not shown in the figure) is started, and the electrolyte flows from the supply chamber 10 to the connecting channel 321, and then flows through the storage chamber 320 into the curved channel 331 in the bend 33, and finally is sprayed from the spray hole 332 to the grinding area (i.e., the workpiece to be processed). At the same time, the ultrasonic generator is turned on, so that the ultrasonic vibration transducer generates a high-frequency electrical signal (frequency range 10-50kHz), which is transmitted to the piezoelectric ceramic plate through the cable and converted into mechanical vibration energy, driving the grinding wheel 3 to generate up and down ultrasonic vibration. With the turn on of the electrolytic power supply (setting an appropriate power supply), the electrolyte is further processed. The ultrasonic vibration (using voltage and current parameters) creates an electrolytic machining electric field between the anode workpiece 50 and the cathode electrolytic plate 4. During grinding, the electrolyte flows from the storage chamber 320 through the curved channel 331 to the spray hole 332. Because the spray hole 332 is set at a certain angle to the tangent direction of the curved channel 331, the electrolyte can be sprayed into the grinding area at a specific angle, quickly removing the heat and debris generated during grinding, reducing the surface temperature of the workpiece, and reducing the risk of thermal damage. Ultrasonic vibration not only optimizes the grinding contact state but also reduces grinding wheel clogging, making material removal smoother and more efficient. At the same time, the continuous impact of ultrasonic vibration on the machined surface helps to refine the surface microstructure.

[0046] More preferably, the angle between the opening direction of the spray hole 332 and the tangential direction of the grinding wheel 3 is 45 degrees, such as... Figure 5 As shown, relying on this structural characteristic, the intersection of the opening directions of the two symmetrical spray holes 332 is located outside the grinding wheel 3. Therefore, the electrolyte can form a fusion channel (i.e., the intersection point) 5mm above the cathode workpiece. When energized, the electrolyte comes into contact with the workpiece and undergoes an electrolytic reaction, causing the metal atoms on the surface of the workpiece to ionize. The grinding wheel 3 continues to rotate and grind, while the electrolyte promptly washes away the electrolytic products and grinding debris. The two complement each other. This method can effectively reduce the surface roughness of the workpiece and improve the surface quality, playing a key role in many metal processing fields.

[0047] The grinding wheel 3 includes an electrolyte inlet disc 30 and a plastic negative electrode piezoelectric ceramic sheet 31. An extension groove 321a communicating with a storage cavity 320 is provided in the electrolyte inlet disc 30. A through groove 321b is provided on the plastic negative electrode piezoelectric ceramic sheet 31. The extension groove 321a and the through groove 321b together form a connecting channel 321. The inner and outer walls of the plastic negative electrode piezoelectric ceramic sheet 31 are respectively interference-fitted to the rotating shaft 1 and the electrolyte inlet disc 30, so that one end of the through groove 321b is connected to the storage cavity 320 and the other end is connected to the liquid supply cavity 10.

[0048] like Figure 1 and Figure 2 As shown, the interference fit assembly relationship between the plastic negative electrode piezoelectric ceramic sheet 31, the electrolyte inlet plate 30, and the rotating shaft 1 provides convenience for workers to assemble and disassemble. Furthermore, the connecting channel 321 formed by the extension groove 321a and the through groove 321b ensures unobstructed flow of the electrolyte from the supply chamber 10 to the storage chamber 320. This design avoids leakage or blockage problems that may occur in traditional pipeline systems, improves the electrolyte delivery efficiency, and ensures that it will not shift or fall off during high-speed rotation, thus enhancing the stability and reliability of the entire system. More preferably, the cathode electrolytic plate 4 in this embodiment is composed of EDM-3 cathode material, firmly embedded in the abrasive working layer of the grinding wheel, and surrounded by a 96% alumina insulating material.

[0049] More preferably, the electrolyte in this embodiment is 10% sodium chloride or 10% sodium nitrate. Of course, this is not limited to the method of this embodiment; it is also possible to coat the processing area with a mixture of rare gases, helium, or argon.

[0050] More preferably, after the electrolyte and ultrasonic vibration grinding in Embodiment 1 are performed simultaneously, a special gas (such as carbon dioxide, hydrogen / oxygen) can be introduced. This gas has special chemical properties, which change the local chemical environment upon contact with the workpiece surface, promoting the precise execution of the electrolytic reaction. As the gas is ejected from the inside of the grinding wheel 3 through the spray hole 332, the flow of the gas carries away the heat and impurities generated by electrolysis, avoiding thermal damage and contamination of the workpiece surface. This results in a smoother and cleaner workpiece surface after polishing, further improving the effect and quality of the polishing process.

[0051] More preferably, such as Figure 1As shown, a four-jaw fixed tray 5 is provided on the machine tool spindle for clamping and fixing the workpiece to be ground, ensuring smoothness and stability throughout the entire process. It is worth noting that the ultrasonic vibration transducer and the four-jaw fixed tray 5 in this embodiment are both controlled by the same control system. The rotating shaft 1 is controlled by the control system to move at the same rotational linear speed. The XYZ three-axis control system controls the machining gap between the ultrasonic vibration transducer and the anode workpiece 50 to achieve low-gap machining.

[0052] Example 2:

[0053] This solution, based on a grinding device using an ultrasonic electrolytic grinding wheel according to Embodiment 1, also provides a grinding method, including the following steps:

[0054] S1. Clamp the inner / outer wall of the anode workpiece 50 with the four-jaw fixing tray 5 to limit its shaking;

[0055] S2. Select a cathode electrolytic sheet 4 with conductivity and strength, such as copper or aluminum, and embed it in the anti-detachment groove 330 and the locking groove 20.

[0056] S3. The electrolyte flows from the supply chamber 10 to the storage chamber 320 through the connecting channel 321 in the grinding wheel 3.

[0057] S4. When the ultrasonic vibration transducer cathode electrolytic plate 4 and the anode workpiece 50 are energized, the rotating shaft 1 drives the ultrasonic vibration transducer and the anode workpiece 50 to generate an amplitude. At the same time, the electrolyte intersects from the spray hole 33245 degrees above and is sprayed into the grinding area.

[0058] S5. Introduce nitrogen or carbon dioxide into the grinding wheel 3 to promote the electrolysis reaction and use the flow of gas to remove the heat and impurities generated during electrolysis.

[0059] In terms of device composition, the specially designed grinding wheel 3 serves as the core component. Its interior is meticulously designed with a network of liquid flow channels and multiple spray holes 332 leading to the grinding surface. The rotating shaft 1 and mounting plate 2 are tightly connected to the grinding wheel 3, enabling the grinding wheel 3 to generate high-frequency ultrasonic vibrations. It is also equipped with a precisely controlled electrolytic power supply. The liquid supply system (liquid supply chamber 10) is responsible for delivering the electrolyte at a stable pressure to the channels inside the grinding wheel 3 (see reference). Figure 3During the processing, the ultrasonic vibration transducer is first activated to generate ultrasonic-frequency micro-vibrations on the surface of the grinding wheel 3, optimizing the grinding contact state. Next, the electrolytic power supply is turned on and appropriate voltage, current, and other parameters are set to create an electrolytic machining electric field between the workpiece and the grinding wheel 3. The electrolyte supply system pumps a pre-mixed electrolyte solution at a specific pressure into the internal flow channel of the grinding wheel. The electrolyte solution is then sprayed evenly into the grinding zone from the spray nozzle 332 in a mist-like manner (due to the 45° opening of the spray nozzle 332). In the processing area, the electrolytic action first softens the workpiece surface and removes some material, while the grinding action of the grinding wheel further precisely removes the workpiece residue. The ultrasonic vibration, on the one hand, makes the abrasive cutting smoother and reduces grinding wheel clogging, and on the other hand, continuously impacts the processed surface, refining the surface microstructure.

[0060] This unique novel ultrasonic electrolytic grinding method allows the electrolyte to act directly and precisely on the grinding zone, avoiding the electrolyte dispersion and loss problems associated with traditional external spraying methods. The synergistic combination of electrolysis and ultrasonic grinding significantly improves processing efficiency, increasing it by more than 75% compared to single grinding methods. Simultaneously, it effectively improves the surface quality, reducing surface roughness to below Ra0.2-Ra0.4μm, and significantly extends grinding wheel life, reducing processing costs. It has extremely broad application prospects in the precision machining of difficult-to-machine materials in aerospace, precision machinery manufacturing, and other fields.

[0061] It should be noted that in this invention, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0062] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0063] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A grinding apparatus using an ultrasonic electrolytic grinding wheel, characterized in that, include: An ultrasonic vibration assembly and an ultrasonic vibration transducer are provided. The ultrasonic vibration assembly includes a rotating shaft, a mounting plate, a grinding wheel, and several cathode electrolytic plates. The assembly plate is mounted on the rotating shaft, the grinding wheel is connected to the assembly plate, a plurality of cathode electrolytic plates are distributed in a ring at equal intervals around the circumference of the grinding wheel and are movably embedded in the assembly plate, and the ultrasonic vibration transducer is connected to the cathode electrolytic plates. The device includes a supply chamber and a storage chamber. The supply chamber is formed inside the rotating shaft and is connected to the outside. The storage chamber is distributed in a ring at equal intervals around the circumference of the grinding wheel. One end of the storage chamber is connected to the supply chamber through a connecting channel, and the other end opens outward from the grinding wheel, so that the electrolyte can flow through the supply chamber to the connecting channel and be sprayed outward from the storage chamber. Machine tool spindle, used to clamp an anode workpiece that can be connected to a pulse power supply.

2. The grinding apparatus using an ultrasonic electrolytic grinding wheel according to claim 1, characterized in that, The grinding wheel has several sets of symmetrically arranged bends around its circumference. The bends and the grinding wheel together form an anti-detachment groove. The mounting plate has a locking groove, and the anti-detachment groove and the locking groove are interconnected to confine the cathode electrolytic plate inside.

3. A grinding device using an ultrasonic electrolytic grinding wheel according to claim 2, characterized in that, The bent portion is provided with a bending channel and a spray hole. The bending channel is used to connect the storage cavity and the spray hole. The spray hole is set at an angle to the tangent direction of the bending channel, and the opening of the spray hole faces outward from the grinding wheel.

4. A grinding device using an ultrasonic electrolytic grinding wheel according to claim 2, characterized in that, The angle between the opening direction of the spray hole and the tangential direction of the grinding wheel is 45 degrees.

5. A grinding apparatus using an ultrasonic electrolytic grinding wheel according to claim 2, characterized in that, The intersection of the opening directions of the two symmetrical spray holes is located outside the grinding wheel.

6. A grinding apparatus using an ultrasonic electrolytic grinding wheel according to claim 1, characterized in that, The cathode electrolytic plate is coated with 96% alumina insulating material.

7. A grinding apparatus using an ultrasonic electrolytic grinding wheel according to claim 1, characterized in that, The grinding wheel includes an electrolyte inlet disc and a plastic negative electrode piezoelectric ceramic sheet. An extension groove communicating with the storage cavity is formed in the electrolyte inlet disc, and a through groove is formed on the plastic negative electrode piezoelectric ceramic sheet. The extension groove and the through groove together form the connecting channel. The inner and outer walls of the plastic negative electrode piezoelectric ceramic sheet are respectively interference-fitted to the rotating shaft and the electrolyte inlet disc, so that one end of the through groove is connected to the storage cavity and the other end is connected to the liquid supply cavity.

8. A grinding apparatus using an ultrasonic electrolytic grinding wheel according to claim 1, characterized in that, The electrolyte is 10% sodium chloride or 10% sodium nitrate.

9. A grinding apparatus using an ultrasonic electrolytic grinding wheel according to claim 1, characterized in that, The machine tool spindle is equipped with a four-jaw fixed tray, and the ultrasonic vibration transducer and the four-jaw fixed tray are both controlled by the same control system.

10. A grinding method, based on a grinding apparatus using an ultrasonic electrolytic grinding wheel as described in any one of claims 1-9, comprising the following steps: S1. The anode workpiece is clamped on the inner / outer wall by a four-jaw fixed tray to limit its shaking; S2. Select cathode electrolytic plates with conductivity and strength, such as copper or aluminum, and embed them in the anti-detachment groove and locking groove; S3. The electrolyte flows from the supply chamber to the storage chamber through the connecting channel inside the grinding wheel. S4. When the cathode electrolytic plate of the ultrasonic vibration transducer is connected to the anode workpiece and energized, the rotating shaft drives the ultrasonic vibration transducer to generate an amplitude between the anode workpiece and the transducer. At the same time, the electrolyte intersects at 45 degrees above the spray hole and is sprayed into the grinding area. S5. Introduce nitrogen or carbon dioxide into the grinding wheel to promote the electrolysis reaction and use the gas flow to remove the heat and impurities generated during electrolysis.

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