Electrolyte guiding mechanism, electrochemical pocket machining device and application thereof in electrochemical machining of wide-chord large-twist-angle blade
By designing an electrolyte guiding mechanism, electrochemical forming of blades with wide chord length and large twist angle was achieved, solving the problem of uneven electrolyte supply, realizing efficient and stable electrochemical processing, reducing manufacturing costs and improving processing quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- AVIC BEIJING AERONAUTICAL MFG TECH RES INST
- Filing Date
- 2026-06-04
- Publication Date
- 2026-07-21
AI Technical Summary
Existing electrochemical forming technology cannot achieve a stable and uniform electrolyte supply on blades with wide chord length and large twist angle, which leads to problems such as insufficient electrolyte flushing, uneven material removal, and short circuits during the processing, making it difficult to meet the high-efficiency and low-cost manufacturing requirements of integral bladed disks for aero engines.
An electrolyte guiding mechanism is adopted, which forms a composite electrolyte supply mode of main flow field and secondary flow field through the combination design of slider and limit block. The electrolyte guiding groove matched with the inlet and outlet of the slider and blade ensures the directional delivery of electrolyte. Combined with the clamping spring and roller, flexible back pressure constraint is achieved to avoid electrolyte leakage and ensure sufficient electrolyte supply in the processing area.
It has achieved efficient and high-quality machining of blades with wide chord length and large twist angle, solved the problem of poor flow field stability, reduced manufacturing costs, improved machining adaptability and machining stability, and ensured the surface quality and dimensional accuracy of the blades.
Smart Images
Figure CN122425275A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of blade electrochemical machining technology, and in particular to an electrolyte guiding mechanism, an electrochemical forming and machining device, and their application in the electrochemical machining of blades with wide chord length and large twist angle. Background Technology
[0002] The integral bladed disk (IBD) of an aero-engine is one of the core components of an aero-engine power plant, and its performance directly determines the engine's thrust-to-weight ratio, reliability, and service life. New-type integral bladed disks for aero-engines generally feature large blade span, wide blade chord lines, large blade twist angles, complex blade structures, and significant material removal during manufacturing, making them one of the most technically challenging core components in engine manufacturing.
[0003] Currently, the machining of large-span integral bladed disks mostly adopts traditional manufacturing technologies such as linear friction welding and CNC milling. However, these technologies generally suffer from problems such as large machining allowances, difficulty in controlling welding / machining position offsets, low material removal rates, and high manufacturing costs. They are difficult to meet the demand of high-performance aero engines for efficient and low-cost manufacturing of integral bladed disks and have obvious technical limitations.
[0004] In the manufacturing of large disc shaft structures for aero-engines, high-speed milling, electrochemical machining (ECM), and linear friction welding are recognized as the three pillar technologies. Among them, ECM is based on the principle of anodic dissolution: the workpiece is connected to the positive terminal of the machining power supply, the tool electrode to the negative terminal, a machining voltage is applied between the two electrodes while maintaining a constant machining gap, and a high-speed flowing electrolyte is introduced into the gap. The workpiece material is directionally removed under the action of electrochemical anodic dissolution. This technology has significant advantages such as high machining efficiency, no tool electrode wear, no mechanical stress during machining, and strong adaptability to material hardness. It demonstrates significant low-cost and high-efficiency advantages in the rough machining of complex structures made of difficult-to-machine materials such as titanium alloys and high-temperature alloys, and has become one of the preferred technologies for the rough machining of integral bladed disks.
[0005] Electrochemical roughing of integral bladed disks generally employs an electrochemical forming process, the core of which is a hollow tool electrode with a grooved electrode. The shape of the electrode groove matches the blade profile to be processed. During the process, a thin sheet at the front end of the electrode performs a forming process on the bladed disk blank, creating a blade profile with machining allowance. After the roughing of adjacent blades is completed, a blade channel is formed. Subsequent finishing operations complete the final blade shape. Because the electrode and workpiece need to move along a predetermined linear feed and rotation trajectory during the processing, the movement path is complex and variable. This causes the flow velocity and pressure of the electrolyte flowing through the electrode groove in the processing area to change dynamically with time and processing position, making it difficult to ensure flow field consistency.
[0006] To solve this problem, the industry usually adopts two types of technical means: (1) For example, the electrochemical sleeve forming processing device for curved and twisted cross-section blades disclosed in 202110606231.7 improves the electrolyte supply form: for integral bladed disks with large blade spacing, a positive-flush supply form is adopted. During processing, the liquid inlet device and the processing electrode are fed to the workpiece synchronously. The electrolyte flows out through the closed curved and twisted cavity of the liquid inlet device, and a liquid supply flow field layout from the blade tip to the blade root is established; for integral bladed disks with small blade spacing, an open liquid supply form is adopted. The liquid inlet device is distributed on both sides of the sleeve forming processing electrode, and a multi-path open flow field layout is established with the blade inlet and outlet side liquid supply as the main part and the blade tip to the blade root liquid supply as the auxiliary part. (2) Optimize process parameters: by increasing the electrolyte pressure to above 2MPa to increase the electrolyte flow rate, the flow field is homogenized; at the same time, by increasing the electrolyte temperature and concentration, the electrolyte activity is improved, and the dissolution capacity of the workpiece material is enhanced.
[0007] However, existing electrochemical forming technology is generally only suitable for machining integral bladed disks with small blade spans and chord lengths of less than 60 mm and bending angles of less than 10°. For integral bladed disks with wide chord lengths and large twist angles, such as aero-engine fan bladed disks with chord lengths of over 100 mm and bending angles of over 20°, the material removal during machining is significantly increased. The wide chord length leads to a substantial extension of the electrolyte flow path, and the large twist angle results in more complex movement trajectories between the electrode and the workpiece. The flow field in the machining area changes drastically and has poor stability. Therefore, stable and reliable machining cannot be achieved simply by improving the existing electrolyte supply method and optimizing the process parameters.
[0008] Specifically, conventional flow field layouts cannot adapt to the processing requirements of blades with wide chord length and large twist angle. Currently, the electrochemical forming process of small-span integral bladed disks mainly adopts two flow field layouts: one is a flow field form with liquid supply mainly from the inlet and outlet sides and liquid supply from the blade tip to the blade root as a supplement; the other is a flow field form with liquid supply mainly from the blade tip to the blade root. The core objective of both layouts is to ensure sufficient electrolyte in the processing area, but neither can be directly applied to the processing of blades with wide chord length and large twist angle: (1) When adopting a flow field form with liquid supply mainly from the inlet and outlet sides and liquid supply from the blade tip to the blade root as a supplement, since the material removal of blades with wide chord length and large twist angle is much higher than that of small-span bladed disks, the blade cascade flow channel is prone to problems such as insufficient electrolyte flushing, accumulation of processing products and uneven material removal in the early stage of processing, resulting in the inability to carry out the processing stably. (2) Figure 1As shown, when a flow field configuration with electrolyte supply primarily from blade tip to blade root is adopted, the wide chord length leads to a significant extension of the electrolyte flow path. When the electrolyte flows through the inlet and outlet sides, pressure and velocity attenuation are likely to occur, resulting in insufficient electrolyte supply in this area. This leads to defects such as protrusions, sludge accumulation, and scale formation on the processed surface, and may even cause short circuits between the electrode and the workpiece, causing processing interruption. At the same time, during the multi-axis compound motion of the electrode and the impeller, the gap between the electrode groove and both sides of the impeller dynamically changes with the rotation trajectory. The electrolyte resistance is significantly reduced in areas where the gap increases, resulting in a large amount of electrolyte leakage (i.e., "water leakage"), which further aggravates insufficient electrolyte flushing in the flow channel area, and is also prone to short circuit failures, causing processing to be unsustainable.
[0009] The complex tooling structure of composite flow field layouts makes it difficult to adapt to complex motion trajectories. To address the shortcomings of single-supply methods, the industry has attempted a composite flow field layout with primary supply from the blade tip to the blade root and secondary supply from the inlet and outlet sides, aiming to balance electrolyte supply to both the flow channel and the inlet / outlet sides. However, this approach requires extremely complex tooling electrode designs to prevent abrupt changes in the electrolyte flow field during processing. Furthermore, in the machining of blades with wide chord lengths and large twist angles, the multi-axis composite feed and rotational motion trajectories of the electrode and blade disk are complex and variable. Complex tooling is prone to motion interference with the workpiece, and replenishment measures for water-deficient areas are difficult to implement effectively and stably. It is impossible to ensure uniform electrolyte supply to both the flow channel and the inlet / outlet sides, ultimately failing to achieve stable machining of the target blade.
[0010] In summary, existing conventional blade electrochemical forming equipment and methods cannot simultaneously solve the electrolyte supply problem in the flow channel region and the intake and exhaust edge region during the processing of blades with wide chord length and large twist angle, making it difficult to achieve uniform and stable electrochemical processing. Summary of the Invention
[0011] The purpose of this invention is to provide an electrolyte guiding mechanism, an electrochemical forming and machining device, and their application in the electrochemical machining of blades with wide chord length and large twist angle, thereby solving the above-mentioned technical problems.
[0012] To achieve the above objectives, the present invention provides an electrolyte guiding mechanism, including a limiting block, a slider, and a clamping spring. The slider is linearly slidably assembled inside the limiting block. One side of the slider elastically abuts against the inner wall of the limiting block through the clamping spring, while the other side forms a gapless flexible clamping fit with the side of the bladed disk blank to be processed. The slider forms back pressure to ensure the supply of electrolyte to the main flow field by blocking electrolyte leakage at the inlet and outlet sides. An electrolyte guiding groove is provided on the side of the slider facing the blade processing area of the bladed disk blank to be processed. The arc trajectory of the electrolyte guiding groove is perfectly matched with the position of the processing area at the inlet and outlet sides of the blade. The groove of the electrolyte guiding groove longitudinally covers the entire blade span and is always aligned with the water-deficient area at the inlet and outlet sides throughout the processing. The inlet end of the electrolyte guide tank is connected to the electrolyte channel inside the electrode. The electrolyte is directionally transported to the blade intake and exhaust side processing area through the guide tank, forming a replenishment flow field.
[0013] Preferably, the slider makes rolling contact with the flat end face of the impeller blank to be processed via rollers.
[0014] Preferably, a dovetail groove is provided on the inner wall of the limiting block, and the two ends of the slider are slidably connected to the dovetail groove via guide rails.
[0015] An electrochemical sleeve forming processing device includes an electrode that is fixed to the spindle of a CNC machine tool in sequence via a water jacket, a liquid collecting chamber and a flange, and a support connected to a turntable. The front end of the support is fixedly connected to the bladed disk blank to be processed via a pressure plate, and the rotation center of the bladed disk blank to be processed is coaxial with the central axis of the support. Two electrolyte guiding mechanisms as described in any one of claims 1-3 are fixed on the side of the electrode facing the bladed disk blank to be processed. The two electrolyte guiding mechanisms are symmetrically arranged on both sides of the bladed disk blank to be processed, and the two electrolyte guiding mechanisms are respectively aligned with the inlet edge and the exhaust edge of the target blade on the bladed disk blank to be processed. The limiting block of the electrolyte guiding mechanism is fixedly connected to the electrode; The electrode is connected to the negative terminal of the machining power supply, and the bladed disk blank to be machined is connected to the positive terminal of the machining power supply.
[0016] Preferably, an indexing plate is also provided on the side of the support facing the bladed disk blank to be processed, for adjusting the angular position of the target blade on the bladed disk blank to be processed.
[0017] Application of electrochemical profile machining equipment in electrochemical machining of blades with wide chord length and large twist angle. The blades with wide chord length and large twist angle are integral bladed disk blades for aero-engine fans, with a chord length ≥100mm and a blade bending and twist angle ≥20°.
[0018] Preferably, during processing, the electrode performs translational motion along the X and Y axes and radial feed motion along the Z axis, while the bladed disk blank to be processed rotates around the C axis. The electrolyte guiding mechanism moves synchronously with the electrode. During processing, the electrolyte is sprayed from the electrolyte channel through the blade tip of the bladed disk blank to the blade root and into the processing area to form a main flow field. At the same time, the electrolyte is directionally transported from both sides of the bladed disk blank to the inlet and outlet sides of the blade through the electrolyte guiding tank to form a secondary flow field. The combined supply of electrolyte through the main flow field and the secondary flow field ensures a sufficient supply of electrolyte in the processing area. Moreover, the electrolyte guiding mechanism uses compression springs and rollers to achieve flexible back pressure constraint on the flow field in the processing area, completely sealing off electrolyte leakage and continuously replenishing electrolyte to the water-deficient areas at the inlet and outlet sides.
[0019] Therefore, the present invention, employing the aforementioned electrolyte guiding mechanism, electrochemical forming and machining device, and its application in the electrochemical machining of blades with wide chord lengths and large twist angles, has the following beneficial effects: 1. Wide processing adaptability, breaking through size and structure limitations: It is not constrained by blade size, structural shape and blade cascade space. It can process conventional integral bladed disk blades with simple outline, equal cross section, small bending and twisting angle and large blade cascade spacing. It can also complete one-time efficient and high-quality processing of large blade width and chord length integral bladed disk blades with complex outline, chord length ≥100mm and twist angle ≥20°. 2. Optimize the flow field layout and solve the pain points of traditional processing: Construct a composite liquid supply mode of the main flow field from the blade tip to the blade root and the secondary flow field from both sides of the blade disk to the inlet and outlet sides, taking into account the electrolyte supply of the flow channel and the inlet and outlet sides, solving the problems of poor flow field stability, easy short circuit at the processing edge, and electrolyte supply and demand imbalance in conventional processes, and effectively applying electrochemical processing to the processing scenarios of blades with wide chord length and large twist angle. 3. Achieve flexible flow field constraint and ensure processing stability: The electrolyte guiding mechanism can follow the multi-axis composite motion of the electrode and the impeller without interference, and has the dual functions of back pressure leakage prevention and directional electrolyte replenishment. It forms a flexible constraint on the flow field in the processing area, ensuring a sufficient supply of electrolyte in the processing area throughout the process, and avoiding processing failures such as water leakage, mud accumulation and short circuit from the root. 4. Improve processing quality and economy: Relying on the inherent advantages of electrochemical processing, such as stress-free operation, electrode loss-free operation, and high efficiency, combined with a flexible flow field constraint scheme, the processed blades have complete blade shape and excellent surface quality. The blade body allowance and shape and position accuracy meet the design requirements, while reducing the manufacturing cost of complex integral bladed disks.
[0020] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description
[0021] Figure 1 This is a schematic diagram illustrating the limitations of conventional electrochemical forming processes for blades with wide chord lengths and large twist angles using traditional methods. Figure 2 This is a schematic diagram of the electrolyte guiding mechanism of the present invention. Figure 3 This is a bottom view of the electrolyte guiding mechanism of the present invention; Figure 4 This is a diagram showing the arrangement of the electrolyte guide tank in the electrolyte guiding mechanism of the present invention; Figure 5 This is a partial perspective view of the electrochemical sleeve forming apparatus of the present invention; Figure 6 This is an overall front view of the electrochemical sleeve forming apparatus of the present invention; Figure 7 This is a schematic diagram of the motion posture changes during the electrochemical forming process of the blade with a wide chord length and large twist angle according to the present invention.
[0022] Figure Labels 1. Flange; 2. Liquid collecting chamber; 3. Water jacket; 4. Electrode; 5. Limiting block; 501. Dovetail groove; 6. Slider; 601. Guide rail; 602. Electrolyte guide tank; 7. Compression spring; 8. Roller; 9. Blade blank to be processed; 10. Indexing plate; 11. Pressure plate; 12. Support. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the embodiments of the present invention and are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of this application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.
[0024] It should be noted that the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, such as a process, method, system, product, or server that includes a series of steps or units, not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product, or device.
[0025] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
[0026] like Figures 2-4 As shown, an electrolyte guiding mechanism includes a limiting block 5, a slider 6, and a clamping spring 7. The slider 6 is linearly slidably assembled inside the limiting block 5. One side of the slider 6 elastically abuts against the inner wall of the limiting block 5 through the clamping spring 7, and the other side forms a gapless flexible clamping fit with the side of the bladed disk blank 9 to be processed. The slider 6 forms back pressure to ensure the supply of electrolyte in the main field by blocking the electrolyte leakage at the inlet and outlet sides. An electrolyte guiding groove 602 is provided on the side of the slider 6 facing the blade processing area of the bladed disk blank 9 to be processed. The arc trajectory of the electrolyte guiding groove 602 is completely matched with the position of the blade inlet and outlet side to be processed. The groove of the electrolyte guiding groove 602 longitudinally covers the entire blade span and is always aligned with the water-deficient area at the inlet and outlet sides throughout the processing. The inlet end of the electrolyte guide tank 602 is connected to the electrolyte channel inside the electrode 4. The electrolyte is directionally transported to the blade intake and exhaust side processing area through the guide tank to form a replenishment flow field.
[0027] The slider 6 makes rolling contact with the flat end face (non-blade, non-flow channel processing area) of the blade blank 9 to be processed via the roller 8.
[0028] The inner wall of the limiting block 5 is provided with a dovetail groove 501, and the two ends of the slider 6 are slidably connected to the dovetail groove 501 via the guide rail 601.
[0029] like Figures 5-7 As shown, an electrochemical forming machining device includes an electrode 4 fixed to the spindle of a CNC machine tool via a water jacket 3, a liquid collecting chamber 2, and a flange 1, and a support 12 connected to a turntable. The front end of the support 12 is fixedly connected to the bladed disk blank 9 to be processed via a pressure plate 11, and the rotation center of the bladed disk blank 9 to be processed is coaxial with the central axis of the support 12. Two electrolyte guiding mechanisms as described in any one of claims 1-3 are fixed on the side of the electrode 4 facing the bladed disk blank 9 to be processed. The two electrolyte guiding mechanisms are symmetrically arranged on both sides of the bladed disk blank 9 to be processed, and the two electrolyte guiding mechanisms are respectively aligned with the air inlet edge and the air outlet edge of the target blade on the bladed disk blank 9 to be processed. The limiting block 5 of the electrolyte guiding mechanism is fixedly connected to the electrode 4. The electrode 4 is connected to the negative terminal of the machining power supply, and the bladed disk blank 9 to be processed is connected to the positive terminal of the machining power supply.
[0030] An indexing plate 10 is also provided on the support 12 and on the side facing the bladed disk blank 9 to be processed, for adjusting the angular position of the target blade on the bladed disk blank 9 to be processed.
[0031] Application of electrochemical profile machining equipment in electrochemical machining of blades with wide chord length and large twist angle. The blades with wide chord length and large twist angle are integral bladed disk blades for aero-engine fans, with a chord length ≥100mm and a blade bending and twist angle ≥20°.
[0032] During processing, electrode 4 performs translational motion along the X and Y axes and radial feed motion along the Z axis. The bladed disk blank 9 to be processed rotates around the C axis (the central axis of support 12). The electrolyte guiding mechanism moves synchronously with electrode 4. During processing, the electrolyte is sprayed from the tip of the bladed disk blank 9 through the electrolyte channel to the blade root and into the processing area to form the main flow field. At the same time, the electrolyte is directionally transported from both sides of the bladed disk blank 9 to the inlet and outlet sides of the blade through the electrolyte guiding tank 602 to form the secondary flow field. The combined supply of electrolyte through the main flow field and the secondary flow field ensures a sufficient supply of electrolyte in the processing area. Moreover, the electrolyte guiding mechanism uses the compression spring 7 and roller 8 to achieve flexible back pressure constraint on the flow field in the processing area, sealing off electrolyte leakage throughout the process and continuously replenishing electrolyte to the water-deficient areas at the inlet and outlet sides.
[0033] Example In this embodiment, the electrochemical forming and machining apparatus described in this invention is used to process a TC4 titanium alloy integral bladed disk for aero-engines with a wide chord length and large twist angle. This integral bladed disk has multiple blades evenly distributed circumferentially, with blade dimensions of approximately 120mm × 80mm × 1mm, a blade chord length ≥ 100mm, and a blade profile twist angle ≥ 20°. Before machining, the initial machining clearance is used. Adjust the relative position of the electrode end face and the impeller blank to be processed. Connect the machine tool's liquid inlet pipe to the device's liquid inlet nozzle. Connect the electrode to the negative terminal of the DC processing power supply, and connect the impeller blank to the positive terminal of the DC processing power supply. Set the processing parameters: use a 12%-15% KBr aqueous solution as the electrolyte, control the electrolyte temperature at 26-28℃, the electrolyte pressure at 0.6-1.0MPa, the processing voltage at 21.5V, the electrode processing feed speed at 0.8mm / min, and the processing stroke at 120mm. During processing, the electrode performs X-axis and Y-axis translation and Z-axis radial feed movements, while the impeller blank rotates around the C-axis. The electrolyte guide machine... The electrode moves synchronously with the structure, and the liquid is supplied through a combination of the main flow field from the blade tip to the blade root and the secondary flow field from both sides of the blade disk to the inlet and outlet edges to complete the electrochemical machining of a single blade. After the machining of a single blade is completed, the feed is stopped, the power is cut off, the electrode is retracted, and the angular position of the blade disk blank to be machined is adjusted to the next blade through the indexing plate. The above machining steps are repeated until all blades of the entire blade disk are machined. In this embodiment, the machining time of a single blade is about 150 minutes. The machined blade has a complete blade shape, excellent flow channel and blade surface quality, and the blade body margin, blade shape and blade angular position all meet the part design requirements. It can stably realize the efficient and high-quality electrochemical machining of blades with wide chord length and large twist angle.
[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.
Claims
1. An electrolyte guiding mechanism, characterized in that: It includes a limiting block, a slider, and a clamping spring; the slider is linearly slidably assembled inside the limiting block, one side of the slider elastically abuts against the inner wall of the limiting block through the clamping spring, and the other side forms a gapless flexible clamping fit with the side of the bladed disk blank to be processed. The slider forms back pressure to ensure the supply of electrolyte in the main field by blocking the leakage of electrolyte at the inlet and outlet sides; an electrolyte guide groove is opened on the side of the slider facing the blade processing area of the bladed disk blank to be processed. The arc trajectory of the electrolyte guide groove is perfectly matched with the position of the processing area at the inlet and outlet sides of the blade. The groove of the electrolyte guide groove longitudinally covers the entire blade span and is always aligned with the water-deficient area at the inlet and outlet sides throughout the processing. The inlet end of the electrolyte guide tank is connected to the electrolyte channel inside the electrode. The electrolyte is directionally transported to the blade intake and exhaust side processing area through the guide tank, forming a replenishment flow field.
2. The electrolyte guiding mechanism according to claim 1, characterized in that: The slider makes rolling contact with the flat end face of the impeller blank to be processed via rollers.
3. The electrolyte guiding mechanism according to claim 1, characterized in that: The inner wall of the limiting block is provided with a dovetail groove, and the two ends of the slider are slidably connected to the dovetail groove via guide rails.
4. An electrochemical forming apparatus, characterized in that: It includes an electrode that is fixed to the spindle of a CNC machine tool in sequence via a water jacket, a liquid collecting chamber and a flange, and a support connected to a turntable. The front end of the support is fixedly connected to the blank of the impeller to be processed via a pressure plate, and the rotation center of the blank of the impeller to be processed is coaxial with the central axis of the support. Two electrolyte guiding mechanisms as described in any one of claims 1-3 are fixed on the side of the electrode facing the bladed disk blank to be processed. The two electrolyte guiding mechanisms are symmetrically arranged on both sides of the bladed disk blank to be processed, and the two electrolyte guiding mechanisms are respectively aligned with the inlet edge and the exhaust edge of the target blade on the bladed disk blank to be processed. The limiting block of the electrolyte guiding mechanism is fixedly connected to the electrode; The electrode is connected to the negative terminal of the machining power supply, and the bladed disk blank to be machined is connected to the positive terminal of the machining power supply.
5. The electrochemical forming apparatus according to claim 4, characterized in that: An indexing plate is also provided on the side of the support facing the bladed disk blank to be processed, which is used to adjust the angular position of the target blade on the bladed disk blank to be processed.
6. The application of the electrochemical forming and machining apparatus as described in claim 4 or 5 in the electrochemical machining of blades with wide chord length and large twist angle, characterized in that: Wide chord length and large twist angle blades are integral bladed disk blades for aero-engine fans, with a blade chord length ≥100mm and a blade bending twist angle ≥20°.
7. The application of the electrochemical forming and machining apparatus according to claim 6 in the electrochemical machining of blades with wide chord length and large twist angle, characterized in that: During processing, the electrode performs translational motion along the X and Y axes and radial feed motion along the Z axis, while the bladed disk blank to be processed rotates around the C axis. The electrolyte guiding mechanism moves synchronously with the electrode. During processing, the electrolyte is sprayed from the electrolyte channel through the blade tip of the bladed disk blank to the blade root and into the processing area to form a main flow field. At the same time, the electrolyte is directionally transported from both sides of the bladed disk blank to the inlet and outlet sides of the blade through the electrolyte guiding tank to form a secondary flow field. The combined supply of electrolyte through the main flow field and the secondary flow field ensures a sufficient supply of electrolyte in the processing area. Moreover, the electrolyte guiding mechanism uses compression springs and rollers to achieve flexible back pressure constraint on the flow field in the processing area, sealing off electrolyte leakage throughout the process and continuously replenishing electrolyte to the water-deficient areas at the inlet and outlet sides.