Electrochemical machining device with closed blade structure and machining method

Abstract

The application provides a closed cascade structure electrolytic machining device and a machining method. The machining device comprises a blade back electrode, a blade basin electrode, a first water jacket, a second water jacket and a driving assembly. The blade back electrode is provided with a first machining surface for machining a blade back surface. The blade basin electrode is provided with a second machining surface for machining a blade basin surface. The first water jacket is provided with a first channel for electrolyte flow. The second water jacket is provided with a second channel for electrolyte flow. The driving assembly is connected to the blade back electrode and the blade basin electrode. The side surface of the blade back electrode away from the first machining surface and the side surface of the blade basin electrode away from the second machining surface form a third channel for electrolyte flow. The driving assembly can drive the blade back electrode and the blade basin electrode to move along the length direction of the third channel, or drive the blade back electrode and the blade basin electrode to move away from each other. The application improves the machining precision and efficiency of the closed cascade structure, and greatly simplifies the process and the process implementation process.

Description

Technical Field

[0001] This invention relates to the field of electrolytic machining technology, and more specifically, to an electrolytic machining apparatus and method for a closed-type cascade structure. Background Technology

[0002] In the design of fans and compressors for both military and civilian turbofan aero engines, components such as integral bladed disks and closed rectifiers are widely used. These components are often made of high-temperature alloys and titanium alloys, which have poor machinability. The dense blade cascades, thin and twisted blades, and inclined flow channels, along with the high requirements for blade profile and positional accuracy, make traditional machining extremely difficult. This results in severe machining deformation that is difficult to control, severe tool wear, extremely low machining efficiency, high costs, and poor surface quality.

[0003] Electrolytic machining (EMC) is a specialized process that utilizes the principle of electrochemical anodic dissolution to remove metal particles. In EMC, the tool electrode acts as the electrode, and the workpiece as the anode. The EMC electrode is typically made of metal, and its working surface shape is the opposite of the required shape of the workpiece anode. For example, when machining grooves or holes, the tool electrode end has a raised rib or columnar structure; when machining bosses, the tool electrode end has a concave cavity structure. During EMC, a certain gap is maintained between the workpiece anode and the tool electrode. A direct current or pulsed voltage is applied between the electrodes. The electrolyte is generally a neutral salt solution, forming an electrochemical reaction cell between the electrodes. Simultaneously, high-speed scouring continuously removes EMC products and heat, and depolarizes the workpiece. The workpiece anode dissolves continuously according to the shape of the tool electrode until the workpiece's shape and dimensions meet the requirements.

[0004] Compared with CNC milling, electrochemical machining has advantages such as lower cost (more advantageous in mass production), higher efficiency (time can be reduced by more than 50%), no electrode (tool) wear when machining high-strength / high-hardness materials, and no residual stress and deformation when machining thin structures. When machining blade profiles, it relies on double-sided forming electrodes (blade base and blade back) for machining. During the machining process, a smooth transition can be achieved between adjacent cross sections. Moreover, the high quality and high efficiency of electrochemical machining are particularly suitable for mass production.

[0005] Electrolytic machining can efficiently and precisely process the blade profiles of components such as blades, integral bladed disks, crowned bladed disks, integral blade rings, closed integral rectifiers, and diffusers. Currently, the electrolytic machining of integral bladed disks mainly adopts a double-sided (blade face and blade back) machining method with the cathodes moving towards each other synchronously. This allows for the simultaneous machining of both the blade face and blade back profiles of a single blade. The machining process is stress-free and causes no mechanical impact on the blade, effectively solving the deformation control problem in machining.

[0006] Currently, the closed cascade structure 300 (such as...) Figure 1The blade profile machining mainly refers to the precision electrolytic machining method for integral bladed disk blade profiles, that is, the blade cascade channel 320 is pre-machined first, and then the blade 310 is precision machined. When the spacing of the blade cascade channel 320 is relatively small, especially for the blade cascade channel 320 of a closed integral rectifier (such as...), Figure 2 Due to the spatial limitations of the inner flow channel 330 and the outer flow channel 340, only simple electrodes can be used to pre-process the ruled surface of the blade channel 320. It is not possible to simultaneously process the curved surfaces of the blade basin and the blade back. An additional shaping process is required to meet the spatial requirements of the electrolytic finishing electrode entering the target blade processing position in a multi-axis linkage manner.

[0007] Due to the small space in the blade channel, the smallest blade size after electrolytic pre-machining is about 4mm. The electrolytic shaping electrode has an arc-shaped surface similar to the blade profile, which further increases the space requirement. When entering the small-sized ruled surface blade channel of the pre-machining, the electrolytic shaping electrode needs to be precisely positioned with the pre-machining blade channel to prevent interference between the shaping electrode and the blade channel. This requires high manufacturing precision for tooling, electrodes, etc., and the installation and positioning time is long. The process is complex and very difficult to implement. Summary of the Invention

[0008] (a) Technical problems to be solved

[0009] The technical problem that this invention aims to solve is that existing electrolytic machining processes have high requirements for the manufacturing precision of tooling, electrodes, etc., long installation and positioning time, complex processes, and are very difficult to implement.

[0010] (II) Technical Solution

[0011] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0012] In a first aspect, the present invention provides an electrolytic machining apparatus for a closed-blade cascade structure, used to electrolytically machine a blank into a closed-blade cascade structure. The closed-blade cascade structure has multiple blades, and a cascade channel is formed between every two adjacent blades. The machining apparatus includes a blade back electrode, a blade base electrode, a first water jacket, a second water jacket, and a drive assembly. The blade back electrode has a first machining surface for machining the blade back profile. The blade base electrode has a second machining surface for machining the blade base profile. The first water jacket is connected to the blade back electrode and has a first channel for electrolyte flow. The outlet faces the first processing surface; the second water jacket is connected to the leaf basin electrode and has a second channel for electrolyte flow, the outlet of the second channel facing the second processing surface; the drive assembly is connected to the leaf back electrode and the leaf basin electrode; wherein, a third channel for electrolyte flow is formed between the side of the leaf back electrode away from the first processing surface and the side of the leaf basin electrode away from the second processing surface, and the drive assembly can drive the leaf back electrode and the leaf basin electrode to move along the length direction of the third channel, or drive the leaf back electrode and the leaf basin electrode to move in opposite directions.

[0013] Preferably, the processing device further includes a power supply, the blank is electrically connected to the positive terminal of the power supply, and the blade back electrode and blade basin electrode are electrically connected to the negative terminal of the power supply.

[0014] Preferably, the blade back electrode extends to form an insertion portion on the side away from the first processing surface, the blade basin electrode is provided with an insertion groove on the side away from the second processing surface, and the third channel is formed by the blade back electrode, the blade basin electrode, the inner wall surface of the insertion portion and the inner wall surface of the insertion groove.

[0015] Preferably, the blade basin electrode extends to form an insertion portion on the side opposite to the second processing surface, and the blade back electrode is provided with an insertion groove on the side opposite to the first processing surface. The third channel is formed by the blade back electrode, the blade basin electrode, the inner wall surface of the insertion portion, and the inner wall surface of the insertion groove.

[0016] Secondly, the present invention also provides a processing method, wherein the blank is processed using any of the closed-type cascade structure electrolytic processing devices described in the above technical solutions, the processing method comprising the following steps:

[0017] Step 1: Electrolyte is introduced into the third channel, and the electrolyte flows out from the outlet of the third channel and impacts the target position of the blank.

[0018] Step 2: The driving assembly drives the blade back electrode and the blade basin electrode to move along the length direction of the third channel. The electrolyte flows out from the outlet of the third channel and electrolytically processes the blank to form the blade cascade channel. The blade cascade channel has a first side and a second side that are arranged opposite to each other.

[0019] Step 3: A first processing channel is formed between the first processing surface and the first side, and a second processing channel is formed between the second processing surface and the second side. Electrolyte is introduced into the first channel and the second channel. Electrolyte flows from the first channel into the first processing channel and from the second channel into the second processing channel.

[0020] Step 4: The driving component drives the blade back electrode and the blade basin electrode to move in opposite directions. The electrolyte flows in the first processing channel to electrolytically process the first side into a blade back profile, and the electrolyte flows in the second processing channel to electrolytically process the second side into a blade basin profile.

[0021] Preferably, in step three, electrolyte is continuously supplied to the third channel.

[0022] Preferably, the electrolyte is a NaNO3 electrolyte.

[0023] Preferably, the hydraulic pressure range of the electrolyte is 0.2MPa-0.8MPa.

[0024] Preferably, the temperature range of the electrolyte is 25℃-40℃.

[0025] Preferably, the driving assembly drives the back electrode and the base electrode at a feed rate of 0.05 mm / min to 0.5 mm / min.

[0026] (III) Beneficial Effects

[0027] The above-described technical solution of the present invention has at least the following advantages:

[0028] 1. The electrolytic machining apparatus for closed-type blade cascade structures provided by this invention can not only perform electrolytic machining on blade cascade channels, but also on the back and base surfaces of blades. Throughout the entire machining process, the blank and the electrolytic machining apparatus only need to be clamped once to complete the machining of all closed-type blade cascade structures. Neither the electrolytic machining apparatus nor the blank needs to be disassembled, completely eliminating the adjustment errors between the blank and the back and base electrodes. Compared with the traditional three-step electrolytic machining process of "pre-machining, shaping, and finishing," it avoids the disadvantages of repeated electrode and workpiece installation, error accumulation, complex preparation work, high manufacturing costs, and long preparation cycles. The machining process is greatly simplified, and machining efficiency is significantly improved. It can effectively solve the problem of precise positioning between the machining electrodes and blade surfaces for various complex blades, thereby achieving high-efficiency and high-precision machining of complex closed-type blade cascade structures such as integral blade rings and integral rectifiers, and has significant application value.

[0029] 2. A third channel is formed by the inner walls of the blade back electrode, blade basin electrode, insertion part, and insertion groove. This third channel serves as a channel for the flow of electrolyte and is used to form a blade cascade channel for electrolytic machining of the blank. This simplifies the tooling structure and improves the utilization rate of the limited space within the narrow blade cascade channel. During electrolytic machining of the blank, the third channel continuously supplies electrolyte, ensuring that the electrolyte pressure on the first (second) machined surface of the blade back (basin) electrode is balanced with the electrolyte pressure on the non-machined surface of the electrode (the back side of the first machined surface or the back side of the second machined surface). This avoids a large unidirectional force exerted by the electrolyte pressure on the blade back (basin) electrode, ensuring that the blade back (basin) electrode does not undergo elastic deformation. This solves the problem that the deformation of the weakly rigid blade back (basin) electrode under electrolyte pressure makes it difficult to guarantee the machining accuracy of the blade. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of a closed cascade structure.

[0032] Figure 2 This is a magnified view of a closed cascade structure.

[0033] Figure 3 This is a schematic diagram of the processing device provided in an embodiment of the present invention.

[0034] Figure 4This is a schematic diagram of the processing device provided in the embodiment of the present invention for electrolytic processing to form a blade cascade channel.

[0035] Figure 5 This is a schematic diagram of the processing device provided in this embodiment of the invention for electrolytic processing to form blades.

[0036] Figure 6 This is a schematic diagram of the cross-section of the third channel provided in an embodiment of the present invention.

[0037] The labels for the attached figures are as follows:

[0038] 100. Processing device; 200. Blank; 210. Target position; 300. Closed blade cascade structure; 310. Blade; 320. Blade cascade channel; 1. Blade back electrode; 2. Blade base electrode; 3. First water jacket; 4. Second water jacket; 5. Drive assembly; 6. Third channel; 7. First processing channel; 8. Second processing channel; 11. First processing surface; 12. Insertion part; 21. Second processing surface; 22. Insertion groove; 31. First channel; 41. Second channel; 311. Blade back profile; 312. Blade base profile; 321. First side; 322. Second side. Detailed Implementation

[0039] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0040] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be located directly on or indirectly on the other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to the other component.

[0041] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate that the device or element must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating relative importance or the number of technical features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. The specific implementation of this invention will be described in more detail below with reference to specific embodiments:

[0043] like Figure 3 , Figure 4 and Figure 5 As shown, this embodiment of the invention provides an electrolytic machining apparatus 100 for electrolytically machining a blank 200 into a closed blade cascade structure 300. The closed blade cascade structure 300 has multiple blades 310, and a blade cascade channel 320 is formed between every two adjacent blades 310. The machining apparatus 100 includes a blade back electrode 1, a blade basin electrode 2, a first water jacket 3, a second water jacket 4, and a drive assembly 5. The blade back electrode 1 is provided with a first machining surface 11 for machining the blade back profile 311 of the blade 310; the blade basin electrode 2 is provided with a second machining surface 21 for machining the blade basin profile 312 of the blade 310; the first water jacket 3, the second water jacket 4, and the drive assembly 5. A sleeve 3 is connected to the blade back electrode 1 and has a first channel 31 for electrolyte flow, with the outlet of the first channel 31 facing the first processing surface 11; a second water sleeve 4 is connected to the blade basin electrode 2 and has a second channel 41 for electrolyte flow, with the outlet of the second channel 41 facing the second processing surface 21; a drive assembly 5 is connected to the blade back electrode 1 and the blade basin electrode 2; wherein, a third channel 6 for electrolyte flow is formed between the side of the blade back electrode 1 facing away from the first processing surface 11 and the side of the blade basin electrode 2 facing away from the second processing surface 21, and the drive assembly 5 can drive the blade back electrode 1 and the blade basin electrode 2 along the length direction of the third channel 6 (i.e., Figure 3 The drive assembly 5 can move in the direction shown (v1), or drive the blade back electrode 1 and blade base electrode 2 to move in opposite directions. Specifically, the drive assembly 5 can be a multi-axis CNC machine tool, capable of driving the blade back electrode 1 and blade base electrode 2 to perform axial feed motion or opposite-direction motion (i.e.,...) Figure 5 (as shown in the v2 and v3 directions).

[0044] The processing apparatus 100 also includes a power supply (not shown), with the blank 200 electrically connected to the positive terminal of the power supply, and the blade back electrode 1 and blade basin electrode 2 electrically connected to the negative terminal of the power supply. That is, the blade back electrode 1 and blade basin electrode 2 are used as cathodes during electrolytic processing, and the blank 200 is used as the anode during electrolytic processing.

[0045] Specifically, the blade back electrode 1 and the blade basin electrode 2 are connected to the negative terminal of the power supply, and the blank 200 is connected to the positive terminal of the power supply. A certain amount of processing voltage is applied between the electrodes. The specific processing voltage depends on the actual processing material, processing gap, and other conditions.

[0046] like Figure 6As shown, in one embodiment, the blade back electrode 1 extends to the side opposite to the first processing surface 11 and forms a connector 12, while the blade basin electrode 2 has a connector groove 22 on the side opposite to the second processing surface 21. The blade back electrode 1, blade basin electrode 2, the inner wall surface of the connector 12, and the inner wall surface of the connector groove 22 together form a third channel 6. Simultaneously, since the connector 12 has a certain extension length, when the blade back electrode 1 and the blade basin electrode 2 move in opposite directions, the connector 12 and the connector groove 22 can still achieve a mating connection, thereby ensuring that they can form a closed third channel 6.

[0047] In one embodiment, the blade basin electrode 2 extends to the side opposite to the second processing surface 21 and forms a plug portion, and the blade back electrode 1 is provided with a plug groove on the side opposite to the first processing surface 11. A third channel 6 is formed between the blade back electrode 1, the blade basin electrode 2, the inner wall surface of the plug portion and the inner wall surface of the plug groove.

[0048] In one embodiment, the blank 200 is mounted on a corresponding machine tool and can rotate with it. Specifically, after machining the blade back profile 311 and blade basin profile 312 of the blades 310 on both sides of the blade cascade channel 320, the blade back electrode 1 and blade basin electrode 2 exit the current blade cascade channel 320. The blank 200 rotates and indexes with the tooling mounted on the indexing axis of the machine tool. Then, the blade back electrode 1 and blade basin electrode 2 feed along the axial direction of the closed blade cascade structure 300 to form the next blade cascade channel 320, and machine the next blade back profile 311 and the next blade basin profile 312 in the blade cascade channel 320. The above actions are repeated until the machining of the blade back profile 311 and blade basin profile 312 of all blades 310 is completed, thereby realizing fully automatic electrolytic machining of all blades 310 of the entire closed blade cascade structure 300.

[0049] This invention also provides a processing method, which uses any of the closed-type cascade structure electrolytic processing apparatus 100 from the above embodiments to process the blank 200. The processing method includes the following steps:

[0050] Step 1: Electrolyte is introduced into the third channel 6. The electrolyte flows out from the outlet of the third channel 6 and impacts the target position 210 of the blank 200.

[0051] Step 2: The drive assembly 5 drives the blade back electrode 1 and the blade basin electrode 2 to move along the length direction of the third channel 6. The electrolyte flows out from the outlet of the third channel 6 and electrolytically processes the blank 200 to form the blade cascade channel 320. The blade cascade channel 320 has a first side 321 and a second side 322 that are arranged opposite to each other. The electrolyte flows out from the outlet of the third channel 6 and forms a DC or pulse voltage between the end face of the third channel 6 and the blank 200 to electrolytically process the blank 200, causing it to dissolve at the corresponding position. Then, the drive assembly drives the blade back electrode 1 and the blade basin electrode 2 to feed axially so that the blank 200 continuously dissolves along the feeding direction to form the blade cascade channel 320.

[0052] Step 3: A first processing channel 7 is formed between the first processing surface 11 and the first side 321, and a second processing channel 8 is formed between the second processing surface 21 and the second side 322. Electrolyte is introduced into the first channel 31 and the second channel 41. Electrolyte flows from the first channel 31 into the first processing channel 7 and from the second channel 41 into the second processing channel 8. Since the blade back electrode 1 has a first processing surface 11 corresponding to the shape of the blade back profile 311, and the blade basin electrode 2 has a second processing surface 21 corresponding to the shape of the blade basin profile 312, during electrolytic machining, the blank 200, acting as the anode, continuously dissolves according to the shapes of the first processing surface 11 and the second processing surface 21. Simultaneously, the electrolyte flows from the first channel 31 to the first processing surface 11 and from the second channel 41 to the second processing surface 21, subjecting the blank 200 to high-speed scouring, continuously carrying away electrolytic machining products and heat, and depolarizing, until the shape and size of the blank 200 meet the requirements.

[0053] Step 4: Drive assembly 5 drives the blade back electrode 1 and blade basin electrode 2 to move in opposite directions. Electrolyte flows in the first processing channel 7 to electrolytically process the first side 321 into the blade back profile 311, and electrolyte flows in the second processing channel 8 to electrolytically process the second side 322 into the blade basin profile 312.

[0054] In one embodiment, in step three, electrolyte is continuously supplied to the third channel 6. This ensures that the electrolyte pressure on the first machined surface 11 (or second machined surface 21) of the blade back electrode 1 (or blade basin electrode 2) is balanced with the electrolyte pressure on the non-machined surface of the electrode (the back side of the first machined surface 11 or the back side of the second machined surface 21). This prevents the electrolyte from exerting a large unidirectional force on the blade back electrode 1 (or blade basin electrode 2), ensuring that the blade back electrode 1 and blade basin electrode 2 do not undergo elastic deformation. This solves the problem that the deformation of the weakly rigid blade back electrode 1 and blade basin electrode 2 under electrolyte pressure makes it difficult to guarantee the blade machining accuracy.

[0055] Furthermore, the electrolyte is NaNO3 electrolyte. NaNO3 electrolyte is a nonlinear electrolyte with high processing efficiency and low cost. It allows for removal of materials through a small cutting gap. Experiments have shown that a NaNO3 electrolyte concentration of 10%-20% is preferred.

[0056] Furthermore, the electrolyte hydraulic pressure range is 0.2MPa-0.8MPa. Excessive electrolyte pressure can cause excessive localized erosion, resulting in uneven wall thickness during machining. Insufficient pressure will not meet the erosion conditions required for electrochemical machining. Through testing, the electrolyte hydraulic pressure range was determined to be controlled within the range of 0.2MPa-0.8MPa.

[0057] Furthermore, the electrolyte temperature range is 25℃-40℃. The electrolyte temperature needs to remain stable during processing to ensure consistent processing conditions during batch production. Based on experiments, the electrolyte temperature range of 25℃-40℃ was determined.

[0058] Furthermore, the machining gap between the machining device 100 and the blank 200 should be appropriately increased to weaken the concentrated etching effect and make the removal more uniform. However, it must be controlled within the anodic dissolution cut-off gap. Experiments have determined that the initial machining gap is 0.1mm-0.3mm.

[0059] Furthermore, higher electrolysis voltages help improve processing efficiency. Experiments have determined that a processing voltage of 18V-24V is most suitable for stainless steel, titanium alloys, and high-temperature alloys.

[0060] Furthermore, the power supply is a pulse power supply with a pulse width of t = 0.1ms-0.3ms and a pulse duty cycle of 5%-60%.

[0061] Furthermore, the drive assembly 5 drives the back electrode 1 and the base electrode 2 to feed at a speed of 0.05 mm / min to 0.5 mm / min.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An electrochemical machining apparatus of a closed cascade structure for electrochemically machining a blank into a closed cascade structure having a plurality of vanes with a cascade passage formed between every two adjacent vanes, characterized in that, The processing apparatus includes: The blade back electrode has a first machining surface for machining the blade back profile. The blade-pot electrode has a second machining surface for machining the blade-pot profile. The first water jacket is connected to the leaf back electrode and has a first channel for the flow of electrolyte, with the outlet of the first channel facing the first processing surface; The second water jacket is connected to the leaf basin electrode and has a second channel for the flow of electrolyte. The outlet of the second channel faces the second processing surface. A drive assembly is connected to the leaf back electrode and the leaf base electrode; A third channel for electrolyte flow is formed between the side of the leaf back electrode facing away from the first processing surface and the side of the leaf basin electrode facing away from the second processing surface. The driving component can drive the leaf back electrode and the leaf basin electrode to move along the length direction of the third channel, or drive the leaf back electrode and the leaf basin electrode to move in opposite directions.

2. An ECM device with closed channel structure according to claim 1, characterized in that, The processing device also includes a power supply, the blank is electrically connected to the positive terminal of the power supply, and the blade back electrode and blade basin electrode are electrically connected to the negative terminal of the power supply.

3. The closed cascade structure electrochemical machining device according to claim 1, wherein, The blade back electrode extends to the side away from the first processing surface and forms an insertion part. The blade basin electrode is provided with an insertion groove on the side away from the second processing surface. The third channel is formed by the blade back electrode, the blade basin electrode, the inner wall surface of the insertion part, and the inner wall surface of the insertion groove.

4. The closed cascade structure electrochemical machining device according to claim 1, wherein The blade basin electrode extends to the side opposite to the second processing surface to form an insertion part, and the blade back electrode is provided with an insertion groove on the side opposite to the first processing surface. The blade back electrode, the blade basin electrode, the inner wall surface of the insertion part and the inner wall surface of the insertion groove together form the third channel.

5. A method of processing, characterized by, The blank is processed using the closed-type cascade structure electrolytic machining apparatus as described in any one of claims 1 to 4, the processing method comprising the following steps: Step 1: Electrolyte is introduced into the third channel, and the electrolyte flows out from the outlet of the third channel and impacts the target position of the blank. Step 2: The driving assembly drives the blade back electrode and the blade basin electrode to move along the length direction of the third channel. The electrolyte flows out from the outlet of the third channel and electrolytically processes the blank to form the blade cascade channel. The blade cascade channel has a first side and a second side that are arranged opposite to each other. Step 3: A first processing channel is formed between the first processing surface and the first side, and a second processing channel is formed between the second processing surface and the second side. Electrolyte is introduced into the first channel and the second channel. Electrolyte flows from the first channel into the first processing channel and from the second channel into the second processing channel. Step 4: The driving component drives the blade back electrode and the blade basin electrode to move in opposite directions. The electrolyte flows in the first processing channel to electrolytically process the first side into a blade back profile, and the electrolyte flows in the second processing channel to electrolytically process the second side into a blade basin profile.

6. The method of claim 5, wherein the step of processing is performed by a computer. In step three, electrolyte is continuously supplied into the third channel.

7. The method of claim 5, wherein the step of processing is performed by a computer. The electrolyte is NaNO3 electrolyte.

8. The method of claim 5, wherein the step of processing is performed by a computer. The hydraulic pressure range of the electrolyte is 0.2MPa-0.8MPa.

9. The processing method as described in claim 5, characterized in that, The temperature range of the electrolyte is 25℃-40℃.

10. The processing method as described in claim 5, characterized in that, The drive assembly drives the back leaf electrode and the base leaf electrode to a feed rate of 0.05 mm / min to 0.5 mm / min.

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