In-line deformation electrolytic machining apparatus and method for thin sheet electrodes

Abstract

The present application relates to a kind of sheet electrode on-line deformation electrolytic processing device and method, belong to the technical field of electrolytic processing.The method is characterized in that: sheet electrode is prepared using material with good conductivity and elasticity.The device is composed of three movement axes and connecting rod deformation mechanism, connecting rod deformation mechanism is installed on X1, X2 main shaft, electrode is connected with connecting rod deformation mechanism;Workpiece is installed on Z main shaft;Overall structure is left-right symmetrical.Through the displacement of X1, X2 main shaft, connecting rod deformation mechanism is driven to move, so that load is applied to electrode to make it produce on-line deformation, the relative motion between workpiece and electrode is realized by the displacement of Z main shaft.Processing, according to the curvature characteristics of machining surface, the displacement of X1, X2 main shaft is respectively regulated, the deformation of electrode symmetry and asymmetry is realized, and the displacement of Z main shaft is simultaneously compounded, i.e., the electrolytic cutting machining of complex surface can be realized.The present application utilizes sheet electrode to realize the machining of three-dimensional surface, simplifies cathode design, and improves the precision and efficiency of electrolytic processing.

Description

Technical Field

[0001] This invention relates to an online deformation electrolytic machining apparatus and method for thin sheet electrodes, belonging to the field of electrolytic machining technology. Background Technology

[0002] Electrolytic machining (EMC) is a non-contact machining process based on the principle of electrochemical anodic dissolution, removing material in ionic form. Due to its advantages such as no recast layer, high processing efficiency, and no tool wear, it is widely used in the machining of aero-engine components. Especially in the manufacturing of integral bladed disks (IBDs), EMC has become one of the main machining processes.

[0003] The patent "Multi-axis Cooperative Nesting Electrolytic Machining Device and Method for Integral Blade Disk with Double-stage Twisted Blade" (application number 202310601683.5, applicant: Jiangsu Jicui Precision Manufacturing Research Institute Co., Ltd., inventors: Zhao Jianshe, Yue Lei, Gao Weizheng, etc.) realizes multi-axis cooperative nesting electrolytic machining of integral blade disk with double-stage twisted blade, which improves the uniformity of the allowance distribution after nesting electrolytic machining of double-stage twisted blade, improves the machining efficiency and machining stability, and makes it meet the needs of subsequent machining.

[0004] In the patent "Method for Electrolytic Machining of Double-Sided Combined Double Cathode and Segmented Controlled Integral Bladed Disk" (application number 202210306217.X, applicant: Nanjing University of Aeronautics and Astronautics, inventors: Xu Zhengyang, Shen Zhenyu, Liu Jia, Zhu Dong), the entire blade profile is machined sequentially by electrolysis in the same processing cycle. There is no need to design and replace the cathode and fixture separately. This avoids the drawbacks of the traditional separate electrolytic machining of the channel pre-machining and profile finishing of integral bladed disks, improves processing efficiency and ensures processing quality and precision.

[0005] In the patent "Integral Bladed Disk Multi-layer Progressive Composite Cathode Rotary Sleeving Electrolytic Machining Device and Method" (application number 202310601679.9, applicant: Jiangsu Jicui Precision Manufacturing Research Institute Co., Ltd., inventors: Zhao Jianshe, Yue Lei, Gao Weizheng, etc.), a multi-layer progressive cathode design is proposed, which makes the machining allowance of the bladed disk more uniform and is more conducive to meeting the actual machining needs of integral bladed disks with large distortion and cross-sectional changes.

[0006] In the patent "An Electrolytic Machining Method for an Integral Bladed Disk" (application number 201811128151.X, applicant: China Aviation Manufacturing Technology Research Institute, inventors: Huang Mingtao, Zhang Mingqi, Cheng Xiaoyuan, Fu Junying), it is proposed that after machining the blade channel by radial feed of the tool cathode, the integral bladed disk is driven to rotate clockwise and counterclockwise to approach the tool cathode for electrolytic finishing.

[0007] The patent “A variable tool cathode for the inner cavity of an integral bladed disk with large twisted blades by electrolytic processing” (application number 201910326896.5, applicant: Anhui University of Science and Technology, inventors: Sun Lunye, Chen Hao, Wang Hui) proposes a variable tool cathode for the inner cavity of an integral bladed disk with large twisted blades by electrolytic processing, which is used to process integral bladed disks with large twisted cross-sections.

[0008] The tool cathode is a crucial component in electrochemical machining, and its design, shape, and manufacturing complexity all influence the precision, efficiency, and stability of the machining process. Many scholars have conducted research on simplifying the tool cathode design process.

[0009] In the patent "Electrolytic machining method for inter-blade flow channel of integral impeller with multi-electrode spiral feed" (application number 200910025834.7, applicant: Nanjing University of Aeronautics and Astronautics, inventors: Zhu Di, Xu Qing, Xu Zhengyang), the blade channel is machined by using a simple-shaped tubular electrode through the multi-dimensional interpolation motion between the tool cathode and the workpiece anode.

[0010] In the patent "A fixture device and method for high-efficiency electrolytic grooving of integral bladed disk" (application number 202210485361.4, applicant: Nanjing University of Aeronautics and Astronautics, inventors: Zhu Di, Duan Shuanglu, Liu Jia), the rotation of the central spindle is converted into the synchronous yaw motion of multiple tube electrodes, realizing "single-axis input and multi-axis output", which greatly improves the processing efficiency.

[0011] In the patent "An Electrolytic Machining Device and Method for Bladed Disk Blade Grid Groups" (Application No. 202210485311.6, Applicant: Nanjing University of Aeronautics and Astronautics, Inventors: Zhu Di, Duan Shuanglu, Liu Jia, Zhu Dong), the bladed disk workpiece rotates around its own axis, and under the anodic dissolution effect of the electrochemical reaction, multiple blades can be processed simultaneously in a single feed. This achieves highly efficient conformal electrolytic / radial feed electrolytic machining of integral bladed disks with twisted blades, which can significantly improve machining efficiency.

[0012] As the structures of integral bladed disk-type parts become increasingly complex, traditional forming electrodes face difficulties when entering narrow and twisted channels. Furthermore, traditional straight tube electrodes cannot meet the machining requirements of complex surfaces. Therefore, in recent years, many researchers have conducted research on the deformation machining of electrodes with simple shapes.

[0013] The patent "Dynamic Deformation Electrolytic Processing Method and Application of Flexible Electrode" (application number 2021126103W, applicant: Nanjing University of Aeronautics and Astronautics, inventors: Zhu Di, Xu Zhengyang, Liu Lin) proposes a flexible electrode made of high-performance rods or tubes. During the processing, a load is applied to the flexible electrode to cause it to dynamically deform, thereby completing the processing of complex surfaces.

[0014] In the patent "Autonomous and Controllable Deformation Electrolytic Processing Method and Device for Shape Memory Alloy Electrode" (application number 202211407585.X, applicant: Nanjing University of Aeronautics and Astronautics, inventors: Xu Zhengyang, Liu Lin, Zhu Di), shape memory alloy is used to make flexible tube electrodes, and the shape memory effect is used to realize the dynamic deformation and recovery of the flexible tube electrodes.

[0015] This invention proposes an online deformation electrolytic machining method and apparatus for thin-sheet electrodes. During machining, the displacements of the left and right spindles are adjusted according to the curvature characteristics of the machining surface to achieve symmetrical and asymmetrical deformation of the electrode. Simultaneously, the displacement of a third spindle is combined to achieve electrolytic cutting of complex surfaces. This invention utilizes thin-sheet electrodes to machine three-dimensional surfaces, simplifying cathode design and improving the accuracy and efficiency of electrolytic machining. Summary of the Invention

[0016] Purpose of the invention:

[0017] The purpose of this invention is to provide an electrolytic machining apparatus and method for completing three-dimensional complex surfaces using thin sheet electrodes of simple shapes, so as to achieve efficient and high-quality machining of complex components such as integral bladed disks.

[0018] Technical solution:

[0019] An online deformation electrolytic processing device for thin sheet electrodes, characterized in that:

[0020] The electrolytic machining device consists of an X1 spindle, a Z spindle, an X2 spindle, a base, a workpiece mounting base, two sets of linkage deformation mechanisms, a thin sheet electrode, and a workpiece.

[0021] The aforementioned X1 spindle, Z spindle, X2 spindle, and base are all mounted on the machine tool;

[0022] The two sets of linkage deformation mechanisms are symmetrical from left to right. Each set of linkage deformation mechanisms consists of an electrode holder, a short connecting rod, a long connecting rod, a support base, and a right-angle connecting rod. The electrode holder is mounted on the right-angle connecting rod. One end of the long connecting rod is connected to the X1 main shaft (Ⅰ-1) or the X2 main shaft, and the other end is connected to one end of the right-angle connecting rod via a bearing to form a first Z-axis rotation joint. The other end of the right-angle connecting rod is connected to one end of the short connecting rod via a bearing to form a second Z-axis rotation joint. The other end of the short connecting rod is connected to the support base via a bearing to form a third Z-axis rotation joint. The support base is mounted on the base.

[0023] The two ends of the aforementioned thin sheet electrode are respectively connected to the electrode holders of two sets of linkage deformation mechanisms;

[0024] The workpiece is mounted on a workpiece mounting base, which is connected to the Z-spindle.

[0025] The above-mentioned online deformation electrolytic processing device for thin sheet electrodes is characterized in that:

[0026] The thin-film electrode is made of a material with good conductivity and elasticity; its structure is a thin film with a large aspect ratio.

[0027] The thin-film electrode consists of a front-machined surface, a rear-machined surface, a left-machined surface, and a right-machined surface;

[0028] When the current machining surface is used for electrolytic machining; the subsequent machining surface is coated with an insulating layer and does not participate in the machining; the left and right machining surfaces are mostly coated with an insulating coating and do not participate in the machining, with the insulating coating width being L, but a portion of the machining surface adjacent to the previous machining surface is left to participate in electrolytic machining in order to facilitate material removal;

[0029] When the post-processed surface is used for electrolytic machining; the pre-processed surface is coated with an insulating layer and does not participate in the machining; the left and right machining surfaces are mostly coated with an insulating coating and do not participate in the machining. The width of the insulating coating is L, but a portion of the machining surface adjacent to the post-processed surface is left to participate in the electrolytic machining in order to facilitate material removal;

[0030] The calculation process for the width L of the insulating coating is as follows:

[0031] The feed rate of the thin-film electrode along the cutting direction is constant, while its deformation rate along the XY directions is symmetrically distributed with the middle cross-section of the thin-film electrode as the plane of symmetry. The deformation is greatest at the middle cross-section of the thin-film electrode, and the deformation rate along the X direction is 0, while the deformation rate along the Y direction is the greatest. Therefore, this cross-section will be used for further analysis.

[0032] Within this cross-section, there are velocities in two directions, namely the feed velocity v of the thin-film electrode. c Maximum deformation speed v d The thin-film electrode moves along an angle θ with a resultant velocity v within this cross section;

[0033]

[0034]

[0035] At this point, the motion of the thin-film electrode is equivalent to the thin-film electrode rotating around the center by an angle θ and then moving at a velocity v; the equilibrium gap of its deformed end face can be calculated as follows:

[0036]

[0037] Where η is the current efficiency, ω is the volume electrochemical equivalent, κ is the conductivity of the electrolyte, and U is the voltage between the two electrodes;

[0038] The side balance gap after deformation:

[0039]

[0040] Deformed channel width:

[0041] D′=h+2Δ″ s

[0042] Where h is the width of the thin-film electrode;

[0043] Therefore, as long as the thin electrode rotates θ in this processed channel without interfering with the channel, the size of the electrode insulation width can be determined.

[0044]

[0045] Where b is the height of the thin-film electrode;

[0046] Finally, the formula for calculating the insulation width of the thin-film electrode is:

[0047]

[0048] The method for online deformation electrolytic machining of thin sheet electrodes using the above-mentioned electrolytic machining apparatus is characterized by:

[0049] Based on the curvature characteristics of the machining surface, the X1 spindle and X2 spindle drive the connecting rod deformation mechanism to generate corresponding displacements, thereby applying a load to the thin electrode to cause it to deform online. At the same time, the displacement of the combined Z spindle drives the workpiece to move upward, ultimately realizing the electrolytic cutting of complex surfaces.

[0050] The above-mentioned method for online deformation electrolytic processing of thin sheet electrodes is characterized by:

[0051] The X1 spindle and X2 spindle drive the connecting rod deformation mechanism to generate corresponding displacements. The specific process is as follows:

[0052] The X1 or X2 spindle drives the long connecting rod to generate displacement. Through the rotating joint of the first Z-axis rotating joint and the second Z-axis rotating joint, it further drives the right-angle connecting rod to generate displacement. Through the rotating joint of the second Z-axis rotating joint and the third Z-axis rotating joint, it further drives the short connecting rod to generate displacement, thereby applying a load to one end of the thin electrode.

[0053] Since the two sets of linkage deformation mechanisms are symmetrical from left to right, the bearing method of the other end of the thin sheet electrode is the same.

[0054] Based on the curvature variation characteristics of the processing surface, the loads at both ends of the thin electrode are adjusted. When symmetrical deformation at both ends is required, the displacements of the X1 main axis and the X2 main axis are the same. When asymmetrical deformation at both ends is required, the displacements of the X1 main axis and the X2 main axis are different.

[0055] The flow field characteristics of the above-described online deformation electrolytic machining method for thin-film electrodes are as follows:

[0056] Since the thin electrode needs to be bent and deformed during processing, an open flow field is adopted to avoid adverse phenomena such as liquid shortage area during processing. An external electrolyte supply device is used to flush the electrolyte from both ends of the thin electrode towards the middle.

[0057] Beneficial effects:

[0058] Compared with the prior art, the present invention has the following significant advantages.

[0059] (1) A method and apparatus for online deformation electrolytic machining of thin sheet electrodes are provided. The displacement of the X1 and X2 spindles drives the connecting rod deformation mechanism to move, thereby applying a load to the electrode to cause it to deform online. The displacement of the Z spindle drives the workpiece to achieve relative movement between the workpiece and the electrode. During machining, the displacement of the X1 and X2 spindles is adjusted according to the curvature characteristics of the machining surface to achieve symmetrical and asymmetrical deformation of the electrode. At the same time, the displacement of the Z spindle is combined to realize electrolytic machining of complex surfaces.

[0060] (2) The electrode has good flexibility and strong load-bearing capacity. Compared with traditional tubular electrodes, using a thin sheet electrode as the tool cathode has better flexibility, can withstand greater loads, achieve greater deformation, and has better recovery ability after deformation. In addition, insulation on both sides of the electrode can achieve micro-removal of material and improve the localization of processing.

[0061] (3) Simplified cathode design and wide range of applications. Using a thin sheet electrode as the tool cathode eliminates the need for complex cathode profile design, and the cathode is easy to process. Furthermore, by applying different displacements to both ends of the connecting rod deformation mechanism, asymmetrical deformation of the electrode can be achieved, and by applying the same displacement to both ends of the connecting rod deformation mechanism, symmetrical deformation of the electrode can be achieved, thus expanding the range of applications. Attached Figure Description

[0062] Figure 1 Schematic diagram of an online deformation electrolytic processing device for thin sheet electrodes;

[0063] Figure 2 Schematic diagram of spindle feed;

[0064] Figure 3 This is a schematic diagram of a linkage deformation mechanism;

[0065] Figure 4 This is a schematic diagram of the deformation of the linkage deformation mechanism;

[0066] Figure 5 This is a schematic diagram of a thin-film electrode;

[0067] Figure 6 This is a schematic diagram of the online deformation electrolytic processing of thin-film electrodes;

[0068] Figure 7 Comparison of processing channels before and after electrode insulation;

[0069] Figure 8 A schematic diagram for calculating the insulation width of a thin-film electrode;

[0070] The labels in the diagram are as follows: Ⅰ-1, X1 spindle; Ⅰ-2, Z spindle; Ⅰ-3, X2 spindle; Ⅰ-4, base; Ⅱ, workpiece mounting seat; Ⅲ, connecting rod deformation mechanism; Ⅲ-1, electrode clamping seat; Ⅲ-2, short connecting rod; Ⅲ-3, long connecting rod; Ⅲ-4, support seat; Ⅲ-5, right-angle connecting rod; Ⅲ-6, ceramic bearing; Ⅳ, thin sheet electrode; Ⅳ-1, initial shape of thin sheet electrode; Ⅳ-2, intermediate shape of thin sheet electrode; Ⅳ-3, final shape of thin sheet electrode; Ⅴ, workpiece; A, third rotary joint; B, second rotary joint; C, first rotary joint. Detailed Implementation

[0071] The specific implementation process of the present invention will be described in detail below with reference to the accompanying drawings.

[0072] like Figure 1 As shown, the online deformation electrolytic machining device for thin sheet electrodes consists of X1 spindle I-1, Z spindle I-2, X2 spindle I-3, base I-4, workpiece mounting seat II, connecting rod deformation mechanism III, thin sheet electrode IV, and workpiece V.

[0073] Among them, X spindle I-1, Z spindle I-2, Y spindle I-3, and base I-4 are all mounted on the machine tool. X1 spindle I-1, Z spindle I-2, and X2 spindle I-3 can achieve the following: Figure 2 As shown in the diagram, base I-4 remains stationary.

[0074] like Figure 3 and Figure 4 As shown, the linkage deformation mechanism III has a symmetrical structure, including two electrode holders III-1, two short connecting rods III-2, two long connecting rods III-3, two support seats III-4, and two right-angle connecting rods III-5. One end of each of the two long connecting rods III-3 is connected to the X1 main shaft I-1 and the X2 main shaft I-3, respectively, and the other end is connected to one end of each of the two right-angle connecting rods III-5, forming a Z-axis rotational joint C. The other end of each of the two right-angle connecting rods III-5 is connected to one end of each of the two short connecting rods III-2, forming a Z-axis rotational joint B. The other end of each of the two short connecting rods III-2 is installed and connected to each of the two support seats III-4, forming a third Z-axis rotational joint A. The support seats III-4 are mounted on the base I-4. In addition, the linkage deformation mechanism III also includes six ceramic bearings III-6, which are respectively installed on the third Z-axis rotational joint A, the second Z-axis rotational joint B, and the first Z-axis rotational joint C, forming a rotating pair.

[0075] The thin-film electrode Ⅳ is made of a material with good conductivity and elasticity. It is a thin film with a large aspect ratio and its two ends are connected to two electrode holders Ⅲ-1 respectively. The workpiece Ⅴ is mounted on the workpiece mounting seat Ⅱ, which is connected to the Z spindle Ⅰ-2.

[0076] Since the thin electrode needs to be bent and deformed during processing, an open flow field is adopted to avoid adverse phenomena such as liquid shortage area during processing. An external electrolyte supply device is used to flush the electrolyte from both ends of the thin electrode towards the middle.

[0077] The process of achieving online deformation electrolytic processing of thin sheet electrodes according to the present invention requires the following steps.

[0078] Step 1: Install workpiece V on workpiece mounting base II. Workpiece mounting base II is connected to Z spindle I-2 and connected to the positive terminal of the electrolytic machining power supply. Thin sheet electrode IV is connected to electrode holder III-1 and connected to the negative terminal of the electrolytic machining power supply.

[0079] Step 2: Move X1 spindle I-1, Z spindle I-2, and X2 spindle I-3 to their initial machining positions;

[0080] Step 3: Introduce electrolyte and connect the electrolytic machining power supply. Adjust the load at both ends of the thin-film electrode IV according to the curvature variation characteristics of the machined surface. When symmetrical deformation at both ends is required, the displacements of spindle I-1 (X1) and spindle I-3 (X2) are the same. When asymmetrical deformation at both ends is required, the displacements of spindle I-1 (X1) and spindle I-3 (X2) are different. Figure 5 As shown; spindles X1 and X2 drive the connecting rod deformation mechanism III to produce corresponding displacements, thereby applying a load to the thin electrode IV to cause it to deform online. Simultaneously, the displacement of spindle Z I-2, combined with the displacement of spindle Z, causes workpiece V to move upwards, ultimately achieving electrolytic cutting of complex surfaces, such as... Figure 6 As shown, the online deformation process of the thin sheet electrode Ⅳ is reflected in the change of its shape from initial Ⅳ-1 to intermediate Ⅳ-2 to final Ⅳ-3;

[0081] Step 4: After processing is complete, disconnect the electrolytic processing power supply and stop the electrolyte supply.

[0082] In addition, the following supplementary explanation is provided regarding the surface insulation of the thin-film electrode.

[0083] (1) The necessity of surface insulation for thin-film electrodes, such as Figure 7 As shown:

[0084] According to Faraday's law and other electrochemical theories, once the processing parameters are determined, the end face gap Δ b For a fixed value:

[0085]

[0086] Where η is the current efficiency, ω is the volumetric electrochemical equivalent, κ is the electrolyte conductivity, U is the voltage between the electrodes, and v c This represents the electrode feed rate.

[0087] When the electrode side is not insulated, the side gap Δ at the electrode feed distance H s :

[0088]

[0089] Where t is the processing time

[0090] The above formula shows that when the electrode side is not insulated, the gap at any point on the side will change with the electrode feed distance, exhibiting a parabolic function relationship, resulting in the workpiece side being a parabolic flared mouth.

[0091] When the electrode side is partially insulated, the side gap Δ′ at the electrode feed distance H is... s for:

[0092]

[0093] Where L is the insulation width of the electrode.

[0094] At this point, the side clearance is independent of the electrode feed rate and depends only on the electrode insulation width, thus reducing secondary electrochemical corrosion on the workpiece side and making the workpiece side flat.

[0095] The width D of the channel after processing is:

[0096] D=h+2Δ′ s

[0097] Furthermore, once the structural parameters of the thin electrode are determined, the width of the processed channel mainly depends on the size of the side gap. Therefore, in order to achieve the processing of narrow channels, it is also necessary to locally insulate the electrode.

[0098] (2) Determining the width of the insulating coating, such as Figure 8 As shown:

[0099] The feed rate of the thin-film electrode along the cutting direction is constant, while its deformation rate along the XY directions is symmetrically distributed with the middle cross-section of the thin-film electrode as the plane of symmetry. The deformation is greatest at the middle cross-section of the thin-film electrode, and the deformation rate along the X direction is 0, while the deformation rate along the Y direction is the greatest. Therefore, this cross-section will be used for further analysis.

[0100] Within this cross-section, there are velocities in two directions, namely the feed velocity v of the thin-film electrode. c Maximum deformation speed v dThe thin-film electrode moves along an angle θ with a resultant velocity v within this cross section;

[0101]

[0102]

[0103] At this point, the motion of the thin-film electrode is equivalent to the thin-film electrode rotating around the center by an angle θ and then moving at a velocity v; the equilibrium gap of its deformed end face can be calculated as follows:

[0104]

[0105] Where η is the current efficiency, ω is the volume electrochemical equivalent, κ is the conductivity of the electrolyte, and U is the voltage between the two electrodes;

[0106] The side balance gap after deformation:

[0107]

[0108] Deformed channel width:

[0109] D′=h+2Δ″ s

[0110] Where h is the width of the thin-film electrode;

[0111] Therefore, as long as the thin electrode rotates θ in this processed channel without interfering with the channel, the size of the electrode insulation width can be determined.

[0112]

[0113] Where b is the height of the thin-film electrode;

[0114] Finally, the formula for calculating the insulation width of the thin-film electrode is:

[0115]

Claims

1. An online deformation electrolytic processing device for thin sheet electrodes, characterized in that: The electrolytic machining device consists of an X1 spindle (Ⅰ-1), a Z spindle (Ⅰ-2), an X2 spindle (Ⅰ-3), a base (Ⅰ-4), a workpiece mounting seat (Ⅱ), two sets of linkage deformation mechanisms (Ⅲ), a thin sheet electrode (Ⅳ), and a workpiece (Ⅴ). The X1 spindle (Ⅰ-1), Z spindle (Ⅰ-2), X2 spindle (Ⅰ-3), and base (Ⅰ-4) mentioned above are all mounted on the machine tool; The two sets of linkage deformation mechanisms (Ⅲ) are symmetrical from left to right. Each set of linkage deformation mechanisms (Ⅲ) consists of an electrode holder (Ⅲ-1), a short connecting rod (Ⅲ-2), a long connecting rod (Ⅲ-3), a support seat (Ⅲ-4), and a right-angle connecting rod (Ⅲ-5). The electrode holder (Ⅲ-1) is mounted on the right-angle connecting rod (Ⅲ-5). One end of the long connecting rod (Ⅲ-3) is connected to the X1 main shaft (Ⅰ-1) or the X2 main shaft (Ⅰ-3), and the other end is connected to one end of the right-angle connecting rod (Ⅲ-5) through a bearing to form a first Z-axis rotation joint (C). The other end of the right-angle connecting rod (Ⅲ-5) is connected to one end of the short connecting rod (Ⅲ-2) through a bearing to form a second Z-axis rotation joint (B). The other end of the short connecting rod (Ⅲ-2) is connected to the support seat (Ⅲ-4) through a bearing to form a third Z-axis rotation joint (A). The support seat (Ⅲ-4) is mounted on the base (Ⅰ-4). The two ends of the aforementioned thin sheet electrode (Ⅳ) are respectively connected to the electrode holders (Ⅲ-1) of the two sets of linkage deformation mechanisms (Ⅲ); The workpiece (V) is mounted on the workpiece mounting base (II), which is connected to the Z spindle (I-2).

2. The online deformation electrolytic processing apparatus for thin-film electrodes according to claim 1, characterized in that: The thin-film electrode (Ⅳ) is made of a material with good conductivity and elasticity; its structure is a thin film with a large aspect ratio. The thin-film electrode consists of a front-machined surface, a rear-machined surface, a left-machined surface, and a right-machined surface; When the current machining surface is used for electrolytic machining; the subsequent machining surface is coated with an insulating layer and does not participate in the machining; the left and right machining surfaces are mostly coated with an insulating coating and do not participate in the machining, with the insulating coating width being L, but a portion of the machining surface adjacent to the previous machining surface is left to participate in electrolytic machining in order to facilitate material removal; When the post-processed surface is used for electrolytic machining; the pre-processed surface is coated with an insulating layer and does not participate in the machining; the left and right machining surfaces are mostly coated with an insulating coating and do not participate in the machining. The width of the insulating coating is L, but a portion of the machining surface adjacent to the post-processed surface is left to participate in the electrolytic machining in order to facilitate material removal; The calculation process for the width L of the insulating coating is as follows: The feed rate of the thin electrode along the cutting direction is constant, while its deformation rate along the XY direction is symmetrically distributed with the middle section of the thin electrode as the plane of symmetry. The deformation is the largest at the middle section of the thin electrode, and the deformation rate of the electrode along the X direction is 0, while the deformation rate along the Y direction is the largest. Therefore, this section is used for the next step of analysis. Within this cross-section, there are velocities in two directions, namely the feed rates of the thin-film electrode. Maximum deformation speed The thin-film electrode is along the cross section angular velocity move; ； ； At this point, the motion of the thin-film electrode is equivalent to the thin-film electrode rotating around the center by an angle θ and then moving at a velocity v; the equilibrium gap of its deformed end face can be calculated as follows: ； in, For current efficiency, It is the volumetric electrochemical equivalent. The conductivity of the electrolyte. The voltage between the two poles; The side balance gap after deformation: ； Deformed channel width: ； in The width of the thin-film electrode; Therefore, as long as the thin electrode rotates in this processed channel... After that, there will be no interference with the channel, and the size of the electrode insulation width can be determined; ； in The height of the thin-film electrode; Finally, the formula for calculating the insulation width of the thin-film electrode is: 。 3. The method for online deformation electrolytic machining of thin sheet electrodes using the electrolytic machining apparatus of claim 1, characterized in that: Based on the curvature characteristics of the machining surface, the X1 spindle (Ⅰ-1) and X2 spindle (Ⅰ-3) drive the connecting rod deformation mechanism (Ⅲ) to generate corresponding displacements, thereby applying a load to the thin electrode (Ⅳ) to cause it to deform online. At the same time, the displacement of the combined Z spindle (Ⅰ-2) drives the workpiece (Ⅴ) to move upward, ultimately realizing the electrolytic cutting of complex surfaces.

4. The online deformation electrolytic processing method for thin-film electrodes according to claim 3, characterized in that: The X1 main shaft (Ⅰ-1) and X2 main shaft (Ⅰ-3) drive the connecting rod deformation mechanism (Ⅲ) to produce corresponding displacements. The specific process is as follows: The X1 spindle (Ⅰ-1) or X2 spindle (Ⅰ-3) drives the long connecting rod (Ⅲ-3) to produce displacement. Through the rotational joint of the first Z-axis rotational joint (C) and the second Z-axis rotational joint (B), it further drives the right-angle connecting rod (Ⅲ-5) to produce displacement. Through the rotational joint of the second Z-axis rotational joint (B) and the third Z-axis rotational joint (A), it further drives the short connecting rod (Ⅲ-2) to produce displacement, thereby achieving the application of load to one end of the thin sheet electrode (Ⅳ). Since the two sets of linkage deformation mechanisms (Ⅲ) are symmetrical from left to right, the bearing method of the other end of the sheet electrode (Ⅳ) is the same; Based on the curvature variation characteristics of the processing surface, the loads at both ends of the thin sheet electrode (Ⅳ) are adjusted. When symmetrical deformation at both ends is required, the displacements of the X1 main axis (Ⅰ-1) and the X2 main axis (Ⅰ-3) are the same. When asymmetrical deformation at both ends is required, the displacements of the X1 main axis (Ⅰ-1) and the X2 main axis (Ⅰ-3) are different.

5. The online deformation electrolytic processing method for thin-film electrodes according to claim 3, characterized in that: Since the thin electrode needs to be bent and deformed during processing, an open flow field is adopted to avoid adverse phenomena such as liquid shortage areas during processing. An external electrolyte supply device is used to flush the electrolyte from both ends of the thin electrode towards the middle.

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