A flow field self-sealing blade array jacketing electrolytic processing device and processing method

Abstract

The present invention discloses a flow field self-sealing blade array nesting electrolytic processing device and processing method. The present invention uses an elastic self-sealing component between the cathode component and the anode component. In the self-sealing flow field, when the cathode component is fed, the array cathode processes multiple blades at a time, thereby improving processing efficiency. While the cathode component is fed, the elastic self-sealing component is pressed against the fixture to form a closed flow field. The array-distributed liquid inlet channels ensure that each blade has sufficient electrolyte. The electrolyte flows through each blade processing area and finally flows out through the liquid outlet channel in the center of the base. The present invention makes the blade nesting electrolytic processing process more stable, solving the problems of poor flow field, easy lack of liquid, and frequent obvious flow lines on the surface of parts during multi-blade processing.

Description

Technical Field

[0001] The present invention relates to the technical field of blade jacketing electrolytic machining, and more particularly to a flow field self-sealing blade array jacketing electrolytic machining device and a machining method. Background Art

[0002] Aeroengine blades are thin, come in a wide variety of shapes and types, and are often made of difficult-to-machine materials such as high-temperature alloys, posing a significant challenge to mechanical manufacturing technology. For blades with uniform cross-sections, CNC milling and wire cutting are currently the most common methods. However, neither method can meet the demand for efficient and low-cost blade processing, severely restricting production quality. CNC milling is significantly affected by the cutting properties of the material itself, resulting in severe tool wear, low efficiency, and high costs, gradually failing to meet the requirements for high-efficiency, low-cost, and large-scale blade manufacturing. Wire cutting, on the other hand, produces a remelting layer that affects surface quality and can only process one blade at a time, resulting in low efficiency.

[0003] Electrolytic trepanning is based on the principle of electrochemical anodic dissolution, which "peels" metal materials from the substrate in the form of ions. This process is unaffected by the material's cutting properties, resulting in high processing efficiency, good surface quality, and zero tool wear. This method offers unique advantages for mass-producing blades of uniform cross-sections. A commonly used electrolytic trepanning method involves machining one blade, then indexing it, and then machining the next. While this method significantly improves the efficiency of single-blade machining compared to CNC milling and wire cutting, it still fails to fully leverage the advantages of electrolytic machining's high efficiency. The time required for tool lifting, indexing, and tool alignment between two blades is excessively long, and some machine tools require manual indexing and tool alignment, further reducing production efficiency. CN113560685B describes a device and method for electrolytic trepanning with a cross-blade cathode pulse. The device features a cross-blade cathode, comprising a large blade cathode and a blade cathode, mounted at the two front ends of a cathode holder, with a group of large and small blades spanning between the two cathodes. During machining, the workpiece is fed axially toward the tool cathode, which vibrates back and forth, machining a pair of large and small blades separated by a group of blades, enabling simultaneous machining of two blades. The two independent flow channels designed to be spaced apart supply liquid to the large and small blades respectively, which can prevent the intersection of the two flow fields, improve the uniformity of the flow field, and ensure that there is sufficient electrolyte in the processing area of ​​the two blades. Although this patent can process two blades at a time, which improves the processing efficiency, the processing device is applied to the diameter-expanded blades. When processing several at the same time, the current is too large and exceeds the power supply capacity. In addition, the two independent flow channels used in this patent to supply liquid to the blades are open flow fields. When processing multiple blades, the flow field is poor and it is easy to lack liquid. Obvious flow lines often appear on the surface of the parts, affecting the surface quality. Summary of the Invention

[0004] The main technical problem to be solved by the present invention is that the existing technology has low processing efficiency in the process of blade cladding electrolysis, and it is impossible to process multiple blades at the same time. In addition, when multiple blades are processed at the same time, insufficient liquid supply is likely to occur, and flow lines appear on the surface of the parts. A flow field self-sealing blade array cladding electrolytic processing device is provided.

[0005] Another technical problem solved by the present invention is to provide a flow field self-sealing blade array jacketing electrolytic processing method.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] A flow field self-sealing blade array jacketing electrolytic processing device, comprising a cathode assembly and an anode assembly;

[0008] The cathode assembly includes a connecting block, a conductive block, a cathode insulating sleeve, and an array cathode. The connecting block is connected to the conductive block. The conductive block is provided with a plurality of cathode insulating sleeves distributed in an array. The array cathode is provided at the end of the cathode insulating sleeve and connected to the conductive block. The array cathode has a processing edge. The connecting block is also provided with a protrusion connected to the elastic self-sealing assembly.

[0009] The anode assembly includes an elastic self-sealing assembly and a base, the base is provided with a blade mounting position, the surface around the blade mounting position is provided with an insulating pad, the insulating pad is provided with an elastic self-sealing assembly, the elastic self-sealing assembly includes an insulating sleeve, the insulating sleeve is provided with an inner cavity and one end is open, the inner cavity is provided with an elastic member and a pressure block, the protrusion of the connecting block extends into the cavity and contacts and connects with the pressure block;

[0010] The connecting block is provided with a liquid inlet connected to the liquid inlet cavity, the liquid inlet cavity of the connecting block is connected to the inner cavity of the conductive block, the inner cavity of the conductive block is connected to the liquid inlet channel of the array-distributed cathode insulating sleeve, the liquid inlet channel is connected to the cavity surrounded by the base, the insulating pad and the elastic self-sealing component, and a liquid outlet channel is provided on the base.

[0011] Furthermore, the array cathode is connected to the negative electrode of the power supply, and the base is connected to the positive electrode of the power supply.

[0012] Furthermore, the cathode insulating sleeve is provided with a plurality of liquid inlet channels, and the liquid inlet channels are distributed in an array, through which sufficient electrolyte is ensured for each blade, and then the cathode assembly and the anode assembly are self-sealed to form a closed space, so that the electrolyte can reach each processing area.

[0013] Furthermore, the machining edges on the array cathode are arranged in parallel and at intervals.

[0014] Furthermore, the elastic member includes a telescopic spring or a buffer pad.

[0015] Furthermore, a sealing ring is provided between the insulating pad and the elastic self-sealing component. During the feeding of the cathode component, the insulating sleeve is pressed tightly against the insulating pad to improve the sealing performance and form a closed space.

[0016] Furthermore, a liquid outlet cavity is provided at the center of the blade mounting position, and the liquid outlet cavity is connected to the liquid outlet.

[0017] Furthermore, the connecting block, the conductive block, and the array cathode are made of conductive materials, and the connecting block is connected to the negative electrode of the power supply.

[0018] Furthermore, the connecting block is connected to the feed shaft of the machine tool chuck.

[0019] A flow field self-sealing blade array nesting electrochemical machining method, comprising the following steps:

[0020] S1. Fix the base on the workbench, place the blade on the base, set an insulating pad around the blade on the base, install an elastic self-sealing component on the insulating pad, and install a sealing ring between the insulating pad and the elastic self-sealing component to complete the anode assembly installation;

[0021] S2. Connect the connecting block to the machine feed shaft, connect the conductive block to the connecting block, place the cathode insulating sleeve in the inner cavity of the conductive block, and the cathode array is provided at the end of the cathode insulating sleeve and connected to the conductive block to complete the cathode assembly installation;

[0022] S3. The protrusions of the connecting block are combined with the elastic self-sealing component to form a sealed cavity between the connecting block, the conductive block, the cathode insulating sleeve, and the base; the liquid inlet pipe is connected to the liquid inlet of the connecting block, the connecting block is connected to the negative electrode of the power supply, so that the cathode array is negatively charged, and the base is connected to the positive electrode of the power supply so that the blades are positively charged;

[0023] S4. The electrolyte is input into the liquid inlet cavity, and then flows into the array-distributed liquid inlet channel of the cathode insulating sleeve, and then flows into the gap between the machining edge and the blade on each array cathode;

[0024] S5. The array cathode is fed forward, and the protrusion of the connecting block squeezes the elastic self-sealing component, pressing the insulating sleeve tightly onto the insulating pad to form a closed space. The electrolyte flows through each blade processing area and flows out through the liquid outlet channel in the center of the base. The array cathode is continuously fed to complete the processing task.

[0025] Compared with the prior art, the beneficial effects are:

[0026] The present invention utilizes a self-sealing flow field design. While the cathode is advancing, the elastic self-sealing assembly is compressed. This allows the cathode to continue advancing by squeezing the expansion spring, thus completing the machining task. This creates a closed flow field while the cathode is advancing, allowing for controllable electrolyte flow paths, a more stable machining process, and addressing surface rippling issues. The sufficient flow within the self-sealing flow field facilitates increased feed speed and further reduces the taper problem of blades with uniform cross-sections from tip to root.

[0027] The array cathode of the present invention can simultaneously process multiple shaft expansion blades, which increases efficiency exponentially compared to sequential processing of individual blades and saves time on tool lifting, indexing, and tool alignment. Furthermore, compared to cathodes for individual blades, array cathodes can save more blank material. While meeting cathode stiffness requirements, array cathodes can produce more blades on the same blank, thereby reducing costs. When the cathode is raised after processing, the elastic self-sealing device lifts, exposing the parts, making it easier to remove and replace parts and observe the processing status of the parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Schematic diagram of a flow field self-sealing blade array nesting electrochemical machining device;

[0029] Figure 2 is a schematic diagram of an elastic self-sealing component;

[0030] Figure 3 It is a schematic diagram of the array cathode arrangement machining edge.

[0031] Among them, 1. Machine tool chuck, 2. Connecting block, 3. Conductive block, 4. Pressing block, 5. Telescopic spring, 6. Insulating sleeve, 7. Protrusion, 8. Insulating pad, 9. Base, 10. Blade, 11. Sealing ring, 12. Array cathode, 13. Cathode insulating sleeve, 14. Liquid inlet, 15. Liquid outlet, 16. Liquid inlet channel, 17. Inner cavity, 19. Processing blade. DETAILED DESCRIPTION

[0032] The present invention will be further explained and illustrated below with reference to the embodiments, but the specific embodiments do not limit the present invention in any form.

[0033] Example 1

[0034] This embodiment provides a flow field self-sealing blade array jacketing electrolytic processing device, such as Figures 1-3 , including a cathode assembly and an anode assembly.

[0035] The cathode assembly includes a connecting block 2, a conductive block 3, a cathode insulating sleeve 13, and an array cathode 12. The connecting block 2 is connected to the conductive block 3, and the conductive block 3 is provided with multiple cathode insulating sleeves 13 distributed in an array. The array cathode 12 is provided at the end of the cathode insulating sleeve 13 and connected to the conductive block 3. The array cathode 12 is provided with a processing edge 19. The connecting block 2 is also provided with a protrusion 7 connected to the elastic self-sealing component.

[0036] The anode assembly includes an elastic self-sealing assembly and a base 9. A blade 10 mounting position is provided in the center of the base 9. An insulating pad 8 is provided on the surface surrounding the blade 10 mounting position. The elastic self-sealing assembly is mounted on the insulating pad 8. The elastic self-sealing assembly includes an insulating sleeve 6, which defines an inner cavity 17 with one end open. A telescopic spring 5 and a pressure block 4 are located within the inner cavity 17. The protrusion 7 of the connecting block 2 extends into the cavity and contacts and connects with the pressure block 4.

[0037] The connecting block 2 is provided with a liquid inlet 14 connected to the liquid inlet cavity, the liquid inlet cavity of the connecting block 2 is connected to the inner cavity of the conductive block 3, the inner cavity of the conductive block 3 is connected to the liquid inlet channel 16 of the array-distributed cathode insulating sleeve 13, the liquid inlet channel 16 is connected to the cavity surrounded by the base 9, the insulating pad 8, and the elastic self-sealing component, and a liquid outlet channel is provided on the base 9.

[0038] Example 2

[0039] This embodiment provides a flow field self-sealing blade array jacketing electrolytic processing device, such as Figures 1-3 , including a cathode assembly and an anode assembly.

[0040] The cathode assembly includes a connecting block 2, a conductive block 3, a cathode insulating sleeve 13, and an array cathode 12. The connecting block 2 is connected to the conductive block 3. The conductive block 3 is provided with multiple cathode insulating sleeves 13 distributed in an array. The array cathode 12 is provided at the end of the cathode insulating sleeve 13 and connected to the conductive block 3. The array cathode 12 is provided with five machining edges 19 that are evenly spaced and arranged in parallel. The connecting block 2 is also provided with a protrusion 7 that is connected to the elastic self-sealing component.

[0041] The anode assembly includes an elastic self-sealing component and a base 9. The base 9 has a mounting position for a blade 10 at its center. The surface surrounding the mounting position for the blade 10 is provided with an insulating pad 8. The elastic self-sealing component is mounted on the insulating pad 8, and a sealing ring 11 is provided between the insulating pad 8 and the elastic self-sealing component. The elastic self-sealing component includes an insulating sleeve 6, which has an inner cavity 17 with one end open. The inner cavity 17 contains a cushion and a pressure block 4. The protrusion 7 of the connecting block 2 extends into the cavity to contact and connect with the pressure block 4.

[0042] The connecting block 2 is provided with a liquid inlet 14 connected to the liquid inlet cavity, the liquid inlet cavity of the connecting block 2 is connected to the inner cavity of the conductive block 3, the inner cavity of the conductive block 3 is connected to the liquid inlet channel 16 of the array-distributed cathode insulating sleeve 13, the liquid inlet channel 16 is connected to the cavity surrounded by the base 9, the insulating pad 8, and the elastic self-sealing component, and the base 9 is provided with a liquid outlet channel

[0043] Example 3

[0044] This embodiment provides a flow field self-sealing blade array jacketing electrolytic processing device, such as Figures 1-3 , including a cathode assembly and an anode assembly.

[0045] The cathode assembly includes a connecting block 2, a conductive block 3, a cathode insulating sleeve 13, and an array cathode 12. The connecting block 2 has an inner cavity and is provided with a liquid inlet 14 connected to the inner cavity. The conductive block 3 is mounted at the outlet end of the inner cavity of the connecting block 2. The conductive block 3 is provided with multiple cathode insulating sleeves 13 distributed in an array. The cathode insulating sleeves 13 are provided with multiple liquid inlet channels 16 distributed in an array. The end of the cathode insulating sleeve 13 is provided with an array cathode 12, and the array cathode 12 is connected to the conductive block 3. The array cathode 12 is provided with machining edges 19 arranged in parallel at intervals. The outer periphery of the connecting block 2 is provided with protrusions 7.

[0046] The anode assembly includes an elastic self-sealing component and a base 9. A blade 10 mounting position is provided at the center of the base 9. A liquid outlet cavity is provided at the center of the blade 10 mounting position, and the liquid outlet cavity is connected to the liquid outlet 15. An insulating pad 8 is provided on the surface surrounding the blade 10 mounting position, and an elastic self-sealing component is provided on the insulating pad 8. A sealing ring 11 is also provided between the insulating pad 8 and the elastic self-sealing component. The elastic self-sealing component includes an insulating sleeve 6, and an inner cavity 17 is provided in the insulating sleeve 6 and is open at one end. A telescopic spring 5 and a pressure block 4 are provided in the inner cavity 17. The protrusion 7 of the connecting block 2 extends into the cavity and contacts and connects with the pressure block 4.

[0047] The connecting block 2 is provided with a liquid inlet 14 connected to the liquid inlet cavity, the liquid inlet cavity of the connecting block 2 is connected to the inner cavity of the conductive block 3, and the arrayed liquid inlet channel 16 on the cathode insulating sleeve 13 is connected to the inner cavity of the conductive block 3. The protrusion 7 of the connecting block 2 of the cathode assembly is combined with the inner cavity 17 of the insulating sleeve 6 of the anode assembly, and the base 9, the insulating pad 8, the elastic self-sealing assembly and the array cathode 12 form a processing cavity. The electrolyte flows into the inner cavity of the connecting block 2 and the conductive block 3 from the liquid inlet 14, and is distributed to each processing edge 19 and blade 10 through the arrayed liquid inlet channel 16, forming a closed space in the self-sealing, ensuring that the electrolyte can take care of each processing area, forming a closed flow field, and the processing process is more stable, which can solve the surface flow mark problem.

[0048] Example 4

[0049] This embodiment provides a flow field self-sealing blade array nesting electrochemical machining method, the steps comprising:

[0050] S1. Fix the base 9 on the workbench, place the blade 10 on the base 9, set the insulating pad 8 around the blade 10 on the base 9, set the insulating sleeve 6 on the insulating pad 8, and prevent the expansion spring 5 from entering the inner cavity 17 of the insulating sleeve 6. Then, place the pressure block 4 on the expansion spring 5 in the inner cavity 17 to complete the installation of the elastic self-sealing assembly. Install the sealing ring 11 between the insulating pad 8 and the elastic self-sealing assembly to complete the installation of the anode assembly.

[0051] S2. Connect the connecting block 2 to the feed shaft of the machine chuck 1, connect the conductive block 3 to the connecting block 2, place the cathode insulating sleeve 13 in the inner cavity of the conductive block 3, and the array cathode 12 is provided at the end of the cathode insulating sleeve 13 and connected to the conductive block 3 to complete the cathode assembly installation;

[0052] S3. Assemble the protrusion 7 of the connecting block 2 with the elastic self-sealing assembly to form a sealed cavity between the connecting block 2, the conductive block 3, the cathode insulating sleeve 13, and the base 9; connect the liquid inlet pipe to the liquid inlet 14 of the connecting block 2, connect the connecting block 2 to the negative electrode of the power supply, so that the array cathode 12 is negatively charged, and connect the base 9 to the positive electrode of the power supply, so that the blade 10 is positively charged;

[0053] S4. The electrolyte is input into the liquid inlet chamber and then flows into the array-distributed liquid inlet channel 16 of the cathode insulating sleeve 13, and then flows into the gap between each array cathode 12 and the blade 10 on the machining edge 19;

[0054] S5. The array cathode 12 is fed forward, and the protrusion 7 of the connecting block 2 squeezes the elastic self-sealing component, so that the insulating sleeve 6 is pressed tightly against the insulating pad 8 to form a closed space. The electrolyte flows through the processing area of ​​each blade 10 and flows out through the liquid outlet channel in the center of the base 9. The array cathode 12 is continuously fed to complete the processing task.

[0055] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A flow field self-sealing blade array jacketing electrolytic processing device, characterized in that: including a cathode assembly and an anode assembly; The cathode assembly includes a connecting block, a conductive block, a cathode insulating sleeve, and an array cathode. The connecting block is connected to the conductive block. The conductive block is provided with a plurality of cathode insulating sleeves distributed in an array. The array cathode is provided at the end of the cathode insulating sleeve and connected to the conductive block. The array cathode has a processing edge. The connecting block is also provided with a protrusion connected to the elastic self-sealing assembly. The anode assembly includes an elastic self-sealing assembly and a base, the base is provided with a blade mounting position, the surface around the blade mounting position is provided with an insulating pad, the insulating pad is provided with an elastic self-sealing assembly, the elastic self-sealing assembly includes an insulating sleeve, the insulating sleeve is provided with an inner cavity and one end is open, the inner cavity is provided with an elastic member and a pressure block, the protrusion of the connecting block extends into the cavity and contacts and connects with the pressure block; The connecting block is provided with a liquid inlet connected to the liquid inlet cavity, the liquid inlet cavity of the connecting block is connected to the inner cavity of the conductive block, the inner cavity of the conductive block is connected to the liquid inlet channel of the array-distributed cathode insulating sleeve, the liquid inlet channel is connected to the cavity surrounded by the base, the insulating pad and the elastic self-sealing component, and a liquid outlet channel is provided on the base.

2. The flow field self-sealing blade array jacketing electrolytic processing device according to claim 1 is characterized in that: The connecting block is connected to the negative pole of the power supply, and the base is connected to the positive pole of the power supply.

3. The flow field self-sealing blade array jacketing electrolytic processing device according to claim 1, characterized in that: The cathode insulating sleeve is provided with a plurality of liquid inlet channels, and the liquid inlet channels are distributed in an array.

4. The flow field self-sealing blade array jacketing electrolytic processing device according to claim 1, characterized in that: The machining edges on the array cathode are arranged in parallel with each other.

5. The flow field self-sealing blade array jacketing electrolytic processing device according to claim 1, characterized in that: The elastic member includes a telescopic spring or a buffer pad.

6. The flow field self-sealing blade array jacketing electrolytic processing device according to claim 1, characterized in that: A sealing ring is also provided between the insulating pad and the elastic self-sealing component.

7. The flow field self-sealing blade array jacketing electrolytic processing device according to claim 1, characterized in that: A liquid outlet cavity is provided at the center of the blade installation position, and the liquid outlet cavity is connected to the liquid outlet.

8. The flow field self-sealing blade array jacketing electrolytic processing device according to claim 1, characterized in that: The connecting block, the conductive block and the array cathode are made of conductive materials, and the connecting block is connected to the negative electrode of the power supply.

9. The flow field self-sealing blade array jacketing electrolytic processing device according to claim 1, characterized in that: The connecting block is connected to the feed shaft of the machine tool chuck.

10. A flow field self-sealing blade array jacketing electrochemical processing method, characterized in that the steps include: S1. Fix the base on the workbench, place the blade on the base, set an insulating pad around the blade on the base, install an elastic self-sealing component on the insulating pad, and install a sealing ring between the insulating pad and the elastic self-sealing component to complete the anode assembly installation; S2. Connect the connecting block to the machine feed shaft, connect the conductive block to the connecting block, place the cathode insulating sleeve in the inner cavity of the conductive block, and the cathode array is provided at the end of the cathode insulating sleeve and connected to the conductive block to complete the cathode assembly installation; S3. The protrusions of the connecting block are combined with the elastic self-sealing component to form a sealed cavity between the connecting block, the conductive block, the cathode insulating sleeve, and the base; the liquid inlet pipe is connected to the liquid inlet of the connecting block, the connecting block is connected to the negative electrode of the power supply, so that the cathode array is negatively charged, and the base is connected to the positive electrode of the power supply so that the blades are positively charged; S4. The electrolyte is input into the liquid inlet cavity, and then flows into the array-distributed liquid inlet channel of the cathode insulating sleeve, and then flows into the gap between the machining edge and the blade on each array cathode; S5. The array cathode is fed forward, and the protrusion of the connecting block squeezes the elastic self-sealing component, pressing the insulating sleeve tightly onto the insulating pad to form a closed space. The electrolyte flows through each blade processing area and flows out through the liquid outlet channel of the base. The array cathode is continuously fed to complete the processing task.

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