Method for electrolytic machining along continuous path by using sheet electrode for on-line deformation, electrode, and use

Abstract

A method for electrolytic machining along a continuous path by using a sheet electrode for on-line deformation, the method for electrolytic machining comprising preparing a sheet electrode (1) by adopting a material having good conductivity and elasticity, dividing the sheet electrode (1) into a plurality of areas (1-A, 1-B, 1-C, 1-D, 1-E) on the basis of differences in profiles to be machined, and performing local insulation treatment on different areas. During machining, on the basis of curvature change characteristics of different profiles of machined parts, the sheet electrode is switched to different machining areas and bears loads to generate on-line deformation, so as to complete machining of different profiles in sequence along a set path, thus achieving electrolytic machining along a continuous path by using a sheet electrode for on-line deformation. The present invention also relates to a sheet electrode for a method for electrolytic machining along a continuous path and a machining method for using a sheet electrode to machine a blade grid channel of a blisk. According to the method for electrolytic machining along a continuous path by using a sheet electrode for on-line deformation, one sheet electrode is used for achieving continuous machining of a plurality of complex profiles, thus improving the machining efficiency, and said method can be used in machining of complex components such as a blisk.

Description

Method for electrolytic machining of continuous track with on-line deformation of sheet electrode and electrode and application TECHNICAL FIELD

[0001] The present application relates to a method for electrolytic machining of continuous track with on-line deformation of sheet electrode and electrode and application, belonging to the technical field of electrolytic machining. BACKGROUND

[0002] The aero-engine is the core component of the aircraft and is one of the most complex industrial products. In the aero-engine, the blisk type parts have the characteristics of complex profile and difficult-to-machine material. Moreover, with the continuous improvement of the performance of the aero-engine, the structure of the blisk type parts is becoming more and more complex, the blade passage becomes more narrow, and the blade profile becomes more twisted, which brings great challenges to the machining and manufacturing. Therefore, it is urgent to find an economical and efficient machining method to complete the high-efficiency and high-quality machining of the parts with complex profile such as the blisk.

[0003] Electrochemical machining is a non-contact machining process based on the principle of electrochemical anodic dissolution to remove materials, which has the advantages of no tool wear, no cutting force, no limitation of machining materials, high machining efficiency, etc., and plays an important role in the machining and manufacturing of aero-engine parts.

[0004] The electrochemical machining process of the blisk mainly includes rough machining of the blade passage and finishing machining of the blade profile. In recent years, in order to improve the uniformity of the excess amount of the blade passage and the machining efficiency, many scholars have carried out a lot of research on the rough machining process of the blade passage.

[0005] In the patent "Multi-layer progressive composite cathode rotating sleeve electrolytic machining device and method for blisk" (application number 202310601679.9 applicant Jiangsu Jucu Precision Manufacturing Research Institute Co., Ltd., inventors Zhao Jianshe Yue Lei Gao Wei Zheng Su Qing Huai Gu Min Kai Zhi Ming Cheng Xin Xiang), a multi-layer progressive design of the cathode is proposed, which makes the distribution of the machining excess amount of the blisk more uniform, and is more conducive to meeting the actual machining requirements of the twisted and large cross-section change degree blisk.

[0006] In the patent "Blisk electrolytic machining tool and method capable of straight-line and rotary composite feeding" (application number 201410013249.6 applicant Nanjing University of Aeronautics and Astronautics, inventors Xu Zhengyang Zhang Juchen Liu Jia Zhu Dong Zhu Oi), it is proposed that the shaped cathode has a composite rotary motion in the radial feeding machining process, which can improve the process applicability, machine the twisted and complex blade passage, and improve the machining precision and level of the blade passage.

[0007] In the patent "Step-by-step zoning method for overall impeller electrolytic machining process and device" (Application No. 201010100905.8 Applicant Nanjing University of Aeronautics and Astronautics, Inventors Zhao Jian-she, Wang Fu-yuan, Wu Jian-min, etc.), a step-by-step numerical control electrolytic machining is proposed, which divides the blade machining into three processes of machining blade basin, blade back and blade root for electrolytic machining, to solve the problems of low machining precision of blade back and blade root and overcut or undercut.

[0008] In the patent "Integral blade disc electrolytic grooving machining ring electrode and process method" (Application No. 201210367002.5 Applicant Shenyang Liming Aero-engine (Group) Co., Ltd., Inventors Zhu Hainan, Yang Jianshi, Yu Bing, Li Wei), through the way of sleeve material electrolytic machining, high-efficiency machining of wide-chord and large-torsion-angle blade passage grooving of integral blade disc is realized.

[0009] In the patent "Integral blade disc electrolytic forming rotary opening forming tool and electrolytic forming method" (Application No. 201911052748.5 Applicant China Aviation Industry Shenyang Liming Aero-engine Co., Ltd., Inventors Zheng Xin, Liu Haibo, Huan Heng, Chen Dong), the designed tool is used for rotary opening machining of integral blade disc variable surface blades, and the machined blades have uniform allowance and high precision.

[0010] In the patent "Non-uniform speed double-rotating variable machining surface cathode integral blade disc electrolytic machining method" (Application No. 201910756930.2 Applicant Nanjing University of Aeronautics and Astronautics, Inventors Xu Zhengyang, Wang Jing, Zhu Di), the machining surface of the cathode is designed as a variable-width machining surface, which is driven to rotate radially at a one-way variable speed according to the simulation trajectory; the blank is driven to rotate at a variable speed according to the simulation optimized parameters, and the blade passage is formed on the blank, improving the uniformity of the machining allowance distribution.

[0011] In the patent "Multiple integral blade disc synchronous electrolytic machining device and machining method" (Application No. 202310382217.2 Applicant Xi'an University of Technology, Inventors Tang Lin, Li Peng-hui, Xue Run-rong, Zhou Jia-kai, Bo-yu-feng, etc.), multiple workpieces are fixedly connected on the same shaft to ensure the synchronous rotation of the workpieces, improve the accuracy of the machining process, increase the stability of the machining, greatly improve the machining efficiency, and save the machining time.

[0012] Electrochemical cutting, as an important branch of electrolytic machining technology, is also commonly used in the machining of aero-engine components.

[0013] In the patent "A tool for machining large thickness electrolytic wire cutting and its using method" (application number 202010417285.4 applicant Nanjing University of Aeronautics and Astronautics, inventor Fang Xiaolong Hu Xiaoyun Han Zhao Xu Chonglong), including a hollow metal pipe for cutting metal, a porous structure opened in the side of the metal pipe, and an insulation part provided on the side of the metal pipe, etc., which improves the large thickness machining capability and the slit width uniformity along the thickness direction, reduces secondary machining, and improves the surface quality and machining efficiency.

[0014] In the patent "Large thickness electrolytic cutting rectangular cross section special-shaped pipe electrode and machining method" (application number 201810595726.2 applicant Nanjing University of Aeronautics and Astronautics, inventor Li Hansong Liu Yang Wang Xizhong Qu Ningsong), a special-shaped pipe electrode with an approximately triangular cross-sectional shape is proposed, which is beneficial to the discharge of electrolytic waste liquid; the special-shaped pipe electrode is wrapped with an insulation layer on both sides, which can reduce the secondary corrosion and overcut of the machined surface, and has important significance for machining large thickness workpieces and improving the flatness of the machining surface.

[0015] In the patent "Workpiece reciprocating motion auxiliary axial liquid flushing electrolytic wire cutting machining method and device" (application number 201910038825.5 applicant Nanjing University of Aeronautics and Astronautics, inventor Zeng Yongbin Yang Tao Xu Wenhuo Fang Xiaolong Hang Yuesen), axial liquid flushing electrolytic wire cutting is adopted to machine large thickness workpieces, and the workpiece makes reciprocating motion along the feed direction and along the axial direction of the wire electrode while making feed cutting motion towards the wire electrode. It is beneficial to the rapid flow of electrolyte in the narrow and long feed end surface machining gap, speeds up the update of electrolyte and the exclusion of electrolytic products, reduces the difference in electrolyte flow rate in the machining gap, and improves the electrolytic cutting machining efficiency and machining precision.

[0016] With the increasingly complex structure of blisk type parts, the traditional forming electrode faces difficulties when entering narrow and twisted channels. The traditional electrolytic wire cutting method uses straight wire electrodes or straight pipe electrodes, which cannot meet the machining requirements of twisted surfaces. In addition, the blisk cascade channel is composed of multiple surfaces such as blade back, hub, and blade basin, and only the single-direction feed of the tool electrode cannot complete the continuous machining of multiple surfaces. Moreover, due to the different narrowness of the channels of different blisks, only the single-direction feed of the tool electrode cannot machine channels with uniform allowance. Therefore, the present application proposes a continuous trajectory electrolytic machining method with online deformation of a thin sheet electrode, and applies it to the electrolytic machining of blisk cascade channels, so as to realize the continuous machining of multiple complex surfaces by using a single simple shape thin sheet electrode. SUMMARY

[0017] The present application aims to provide an electrolytic machining method for completing the continuous machining of multiple complex surfaces by using a single simple shape thin sheet electrode, and realizes the efficient and high-quality machining of complex components such as blisks.

[0018] A continuous track electrochemical machining method of sheet electrode on-line deformation, comprising the following processes: a sheet electrode with a large length-width ratio is prepared by using a material with good electrical conductivity and elasticity; machining tracks are set according to the number of machining profiles, and the sheet electrode is divided into several electrode regions along the length direction; the different electrode regions are respectively subjected to local insulation treatment; during machining, the sheet electrode sequentially completes the machining of different profiles according to the set tracks, and according to the curvature change characteristics of different profiles, a load is applied to the sheet electrode during the machining process to make the sheet electrode generate corresponding on-line deformation; different electrode regions correspond to different machining profiles, and after the machining of each profile is completed, the sheet electrode is switched to the electrode region for machining of the next profile through the relative movement of the machine tool spindle; since the sheet electrode needs to realize bending deformation and multi-degree-of-freedom movement during machining, an open flow field is adopted to realize the flow of electrolyte along the profile direction of the sheet electrode through an external electrolyte supply device.

[0019] The continuous track electrochemical machining method of sheet electrode on-line deformation described above is applied to the machining of a blisk cascade passage, comprising the following processes: the blisk cascade passage is composed of three profiles of blade back, hub and blade basin; the machining track of the sheet electrode is set as a "U" shaped machining track; the sheet electrode is divided into three electrode regions, which correspond to the continuous machining of the three profiles of blade back, hub and blade basin, respectively and sequentially.

[0020] The sheet electrode for realizing the overall blade disc cascade channel processing application comprises: the sheet electrode is divided into five electrode regions in sequence along the length direction according to the profile characteristics of the overall blade disc cascade channel, and is called A region, B region, C region, D region and E region in sequence; wherein the A region and the E region are clamping regions of the sheet electrode, the sheet electrode generates online deformation in the processing process by applying a load in the clamping region, and the clamping region of the sheet electrode does not participate in the electrochemical machining; the sheet electrode is composed of a front machining surface, a rear machining surface, a left machining surface and a right machining surface, and an insulating coating is coated on different regions of each machining surface; wherein the D region of the front machining surface, the left machining surface and the right machining surface of the sheet electrode is used for machining the profile of the blade back of the overall blade disc cascade channel, the B region and the C region of the front machining surface are coated with an insulating coating and do not participate in the electrochemical machining, the D region of the left machining surface and the right machining surface is mostly coated with an insulating coating, but part of the machining surface adjacent to the D region of the front machining surface participates in the electrochemical machining, so as to facilitate material removal, and in the processing process, the front machining surface is fed from the blade tip to the blade root; wherein the C region of the right machining surface of the sheet electrode is used for machining the hub profile of the overall blade disc cascade channel, the B region and the D region of the right machining surface are coated with an insulating coating and do not participate in the electrochemical machining, and in the processing process, the right machining surface is fed along the hub direction; wherein the B region of the rear machining surface, the left machining surface and the right machining surface of the sheet electrode is used for machining the profile of the blade basin of the overall blade disc cascade channel, the C region and the D region of the rear machining surface are coated with an insulating coating and do not participate in the electrochemical machining, and the B region of the left machining surface and the right machining surface is mostly coated with an insulating coating, but part of the machining surface adjacent to the B region of the rear machining surface participates in the electrochemical machining, so as to facilitate material removal, and in the processing process, the rear machining surface is fed from the blade root to the blade tip.

[0021] The overall blade disc cascade channel processing application using the sheet electrode comprises the following processes: step 1, the sheet electrode (1) is first fed from the blade tip to the blade root, and the D region of the front machining surface, the left machining surface and the right machining surface is used as the machining surface to perform machining, and in the processing process, corresponding online deformation is generated according to the curvature change characteristics of the blade back profile, so as to complete the machining of the blade back profile; step 2, the sheet electrode is rotated clockwise, switched to the right machining surface, and fed along the hub direction, and the C region of the right machining surface is used as the machining surface to perform machining, so as to complete the machining of the hub profile; step 3, the sheet electrode is rotated clockwise, switched to the rear machining surface, and fed from the blade root to the blade tip, and the B region of the rear machining surface, the left machining surface and the right machining surface is used as the machining surface to perform machining, and in the processing process, corresponding online deformation is generated according to the curvature change characteristics of the blade basin profile, so as to complete the machining of the blade basin profile.

[0022] The thin slice electrode in the continuous track electrolytic machining method of on-line deformation is applied to closed integral blade disc cascade channel machining, and includes the following processes: the closed integral blade disc cascade channel is composed of four profiles of blade back, hub, blade basin and blade crown; the machining track of the thin slice electrode is set as an "O" machining track; the thin slice electrode is divided into four electrode regions, which correspond to the four profiles of blade back, hub, blade basin and blade crown in sequence.

[0023] The thin slice electrode applied to the closed integral blade disc cascade channel machining includes: the thin slice electrode is divided into five electrode regions in sequence along the length direction according to the profile characteristics of the integral blade disc cascade channel, and is called A region, B region, C region, D region and E region in sequence; wherein the A region and the E region are clamping regions of the thin slice electrode, a load is applied to the clamping regions to make the thin slice electrode generate on-line deformation in the machining process, and the clamping regions of the thin slice electrode do not participate in the electrolytic machining; the thin slice electrode is composed of a front machining surface, a rear machining surface, a left machining surface and a right machining surface, and an insulating coating is coated on different regions of each machining surface; wherein the D region of the front machining surface, the left machining surface and the right machining surface of the thin slice electrode is used for machining the blade back profile of the integral blade disc cascade channel, the B region and the C region of the front machining surface are coated with an insulating coating and do not participate in the electrolytic machining, the D region of the left machining surface and the right machining surface is mostly coated with an insulating coating, but part of the machining surface adjacent to the D region of the front machining surface is left to participate in the electrolytic machining, so as to facilitate material removal, and in the machining process, the front machining surface is fed from the blade tip to the blade root; the C region of the right machining surface of the thin slice electrode is used for machining the hub profile of the integral blade disc cascade channel, the B region and the D region of the right machining surface are coated with an insulating coating and do not participate in the electrolytic machining, and in the machining process, the right machining surface is fed along the hub direction; the B region of the left machining surface and the right machining surface of the thin slice electrode is used for machining the blade basin profile of the integral blade disc cascade channel, the C region and the D region of the rear machining surface are coated with an insulating coating and do not participate in the electrolytic machining, the B region of the left machining surface and the right machining surface is mostly coated with an insulating coating, but part of the machining surface adjacent to the B region of the rear machining surface is left to participate in the electrolytic machining, so as to facilitate material removal, and in the machining process, the rear machining surface is fed from the blade root to the blade tip; the C region of the left machining surface of the thin slice electrode is used for machining the blade crown profile of the closed integral blade disc cascade channel, the B region and the D region of the left machining surface are coated with an insulating coating and do not participate in the electrolytic machining, and in the machining process, the left machining surface is fed along the blade crown direction.

[0024] The closed overall blisk cascade channel processing application of the above-mentioned sheet electrode includes the following processes: Step 1, the sheet electrode is first fed from the blade tip to the blade root, and the D area of the front processing surface, the left processing surface and the right processing surface is used as the processing surface for processing, and in the processing process, corresponding on-line deformation is generated according to the curvature change characteristics of the blade back surface, so as to complete the processing of the blade back surface; Step 2, the sheet electrode is rotated clockwise, switches to the right processing surface, and is fed along the hub direction, and the C area of the right processing surface is used as the processing surface for processing, so as to complete the processing of the hub surface; Step 3, the sheet electrode is rotated clockwise, switches to the rear processing surface, and is fed from the blade root to the blade tip, and the B area of the rear processing surface, the left processing surface and the right processing surface is used as the processing surface for processing, and in the processing process, corresponding on-line deformation is generated according to the curvature change characteristics of the blade basin surface, so as to complete the processing of the blade basin surface; Step 4, the sheet electrode is rotated counterclockwise, switches to the left processing surface, and is fed along the blade crown direction, and the C area of the left processing surface is used as the processing surface for processing, so as to complete the processing of the blade crown surface.

[0025] Compared with the prior art, the present application has the following remarkable advantages.

[0026] (1) A continuous trajectory electrochemical machining method of sheet electrode on-line deformation is provided. The method divides the sheet electrode into several processing areas, and completes the processing of different surfaces by replacing the sheet electrode processing area in the processing process. The continuous processing of multiple complex surfaces is realized by using a single simple sheet electrode, which can be applied to efficient and high-quality machining of complex components such as overall blisks.

[0027] (2) The processing localization is high, and the stray corrosion is less. The sheet electrode is used as the tool cathode, and the sheet electrode is locally insulated, the actual processing surface of the cathode is very small, the side gap is small, the width of the processed cascade channel can be accurately controlled, and in addition, since the cathode processing surface is small, the stray corrosion caused by the existence of stray electric field is greatly reduced, and the processing quality is improved.

[0028] (3) Simplify the cathode design and the application range is wide. The sheet electrode is used as the tool cathode, and the cathode processing is simple and easy to obtain. In addition, only according to the surface characteristics of the machining object, the corresponding load is applied, and the complex surface machining can be completed, which widens the application range. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a schematic diagram of a sheet electrode; Figure 2 is a schematic diagram of a blisk cascade channel processing; In the figure, the reference signs are as follows: 1, sheet electrode, 1-A, A area, 1-B, B area, 1-C, C area, 1-D, D area, 1-E, E area, 1-F, insulating coating, 2, workpiece, I-1, processing initial position, I-2, blade back processing completion position, II-1, hub processing start position, II-2, hub processing completion position, III-1, blade basin processing start position, III-2, processing completion position. DETAILED DESCRIPTION

[0030] The specific implementation process of the present application will be described in detail below with the processing of a blisk cascade channel as an example.

[0031] As shown in Figure 1, the sheet electrode for implementing the "continuous trajectory electrolytic machining method for online deformation of sheet electrode and application" of the present application is divided into five areas A, B, C, D and E according to the profile characteristics of the blisk cascade channel. Among them, the A area and the E area are clamping areas, the B area corresponds to the blade basin area, the C area corresponds to the hub area, and the D area corresponds to the blade back area. The processing trajectory of the sheet electrode is set as a "U" shaped processing trajectory, and the continuous processing of the blade back, hub and blade basin profiles is sequentially completed.

[0032] Preparation of the sheet electrode 1 of the embodiment. A material with good corrosion resistance, good electrical conductivity and good elasticity is selected for preparation, and the electrode shape is a sheet with a large length-width ratio. As shown in Figure 1, the sheet electrode 1 is composed of a front processing surface, a rear processing surface, a left processing surface and a right processing surface, and an insulating coating 1-F is coated on different areas of each processing surface.

[0033] Design of the electrolyte flow form of the embodiment. Since the sheet electrode needs to realize bending deformation and multi-degree-of-freedom movement during processing, an open flow field is adopted, and an external electrolyte supply device is used to realize the flow of electrolyte along the profile direction of the sheet electrode.

[0034] The process of realizing the continuous trajectory electrolytic machining of the sheet electrode online deformation of the embodiment takes the blisk as an example and needs the following steps.

[0035] Step one: complete the sheet electrode 1 and workpiece 2 in the installation of machine tool, and adjust to processing initial position I-1; Step two: electrolyte, turn on the electrolytic machining power, sheet electrode 1 first by the blade tip to the blade root feed, with the-D area of the previous processing surface, left processing surface and right processing surface as the processing surface to process, in the processing process, according to the curvature variation characteristics of the blade back surface produces corresponding on-line deformation, thus completes the processing of the blade back surface, reaches the blade back processing completion position I-2; Step three: stop electrolyte supply, disconnect the power, sheet electrode 1 clockwise rotation, to reach the hub processing start position II-1; Step four: electrolyte, turn on the electrolytic machining power, sheet electrode 1 clockwise rotation, switch to the right processing surface, and feed along the hub direction, with the C area of the right processing surface as the processing surface to process, thus completes the processing of the hub surface, reaches the hub processing completion position II-2; Step five: stop electrolyte supply, disconnect the power, sheet electrode 1 clockwise rotation, to reach the blade basin processing start position III-1; Step six: electrolyte, turn on the electrolytic machining power, sheet electrode 1 clockwise rotation, switch to the back processing surface, and feed from the blade root to the blade tip direction, with the B area of the back processing surface, left processing surface and right processing surface as the processing surface to process, in the processing process, according to the curvature variation characteristics of the blade basin surface produces corresponding on-line deformation, thus completes the processing of the blade basin surface, reaches the processing completion position III-2; Step seven: processing is completed, disconnect the electrolytic machining power, stop electrolyte supply.

Claims

1. A continuous track electrochemical machining method for online deformation of thin-sheet electrodes, characterized in that: The following processes are included: Use materials with good conductivity and elasticity to prepare thin-film electrodes with a large aspect ratio; The machining trajectory is set according to the number of machining surfaces, and the thin electrode is divided into several electrode areas along the length direction; Perform local insulation treatment on different electrode areas; During processing, the thin-sheet electrode completes the processing of different surfaces in sequence according to the set trajectory. According to the curvature change characteristics of different surfaces, a load is applied to the thin-sheet electrode during the processing process to cause it to produce corresponding online deformation. Different electrode areas correspond to different machining surfaces. After each surface is machined, the thin electrode switches the electrode area through the relevant movement of the machine tool spindle to process the next surface. Since the thin-sheet electrode needs to achieve bending deformation and multi-degree-of-freedom movement during the processing, an open flow field is adopted, and an external electrolyte supply device is added to achieve the flow of electrolyte along the surface direction of the thin-sheet electrode.

2. The continuous track electrochemical machining method with online deformation of thin-film electrodes according to claim 1 is applied to the machining of blade channel of an integral blade disk, characterized in that: The following processes are included: The blade channel of the integral blade disk is composed of three surfaces: blade back, hub and blade basin; Set the machining trajectory of the thin electrode to a "U"-shaped machining trajectory; The thin-sheet electrode is divided into three electrode areas, which correspond to the continuous processing of the three surfaces of the blade back, hub and blade basin respectively.

3. A thin-sheet electrode for machining the blade channel of an integral blade disk according to claim 2, characterized in that: The thin-sheet electrode (1) is divided into five electrode regions along the length direction according to the profile characteristics of the integral blade disk cascade channel, which are respectively called region A (1-A), region B (1-B), region C (1-C), region D (1-D), and region E (1-E); wherein region A and region E are clamping regions of the thin-sheet electrode (1), and loads are applied to the clamping regions to cause the thin-sheet electrode (1) to generate online deformation during the machining process, and the clamping regions of the thin-sheet electrode (1) do not participate in the electrolytic machining; The thin-sheet electrode (1) consists of a front processing surface, a rear processing surface, a left processing surface, and a right processing surface, and an insulating coating (1-F) is applied to different areas of each processing surface; The front processing surface, the left processing surface and the D area of ​​the right processing surface of the thin-sheet electrode (1) are used to process the blade back profile of the integral blade disc cascade channel. The B area and the C area of ​​the front processing surface are coated with an insulating coating and do not participate in electrolytic processing. Most of the D area of ​​the left processing surface and the right processing surface are coated with an insulating coating, but a part of the processing surface adjacent to the D area of ​​the front processing surface is left to participate in electrolytic processing to facilitate material removal. During the processing, the front processing surface is fed from the blade tip to the blade root. The C area of ​​the right processing surface of the thin-film electrode (1) is used to process the hub profile of the integral blade disk cascade channel, and the B and D areas of the right processing surface are coated with an insulating coating and do not participate in the electrolytic processing. During the processing, the right processing surface is fed along the hub direction; The rear processing surface, left processing surface and area B of the right processing surface of the thin-sheet electrode (1) are used to process the blade basin profile of the integral blade disc cascade channel. Areas C and D of the rear processing surface are coated with an insulating coating and do not participate in electrolytic processing. Most of area B of the left processing surface and the right processing surface are coated with an insulating coating, but part of the processing surface adjacent to area B of the rear processing surface is left to participate in electrolytic processing to facilitate material removal. During the processing, the rear processing surface is fed from the blade root to the blade tip.

4. The application of the thin-sheet electrode according to claim 3 in the processing of blade channel of an integral blade disk is characterized in that: The following processes are included: Step 1: The thin electrode (1) is first fed from the blade tip to the blade root, and the D area of ​​the front processing surface, the left processing surface and the right processing surface is used as the processing surface for processing. During the processing, corresponding online deformation is generated according to the curvature change characteristics of the blade back profile, thereby completing the processing of the blade back profile; Step 2: The sheet electrode (1) rotates clockwise, switches to the right processing surface, and feeds in the direction of the hub, using the C area of ​​the right processing surface as the processing surface for processing, thereby completing the processing of the hub profile; Step 3: The sheet electrode (1) rotates clockwise, switches to the rear processing surface, and feeds from the blade root to the blade tip. The rear processing surface, the left processing surface, and the B area of ​​the right processing surface are used as processing surfaces for processing. During the processing, corresponding online deformation is generated according to the curvature change characteristics of the blade basin profile, thereby completing the processing of the blade basin profile.

5. The continuous track electrochemical machining method with online deformation of thin-film electrodes according to claim 1 is applied to the machining of blade channel of closed integral blade disk, characterized in that: The following processes are included: The closed integral blade disk cascade channel is composed of four surfaces: blade back, hub, blade basin and blade crown; Set the machining trajectory of the thin electrode to an "O"-shaped machining trajectory; The thin-sheet electrode is divided into four electrode areas, which correspond to and complete the continuous processing of the four surfaces of the blade back, hub, blade basin and blade crown in sequence.

6. A thin-film electrode for machining the closed blisk cascade channel according to claim 5, characterized in that: The thin-sheet electrode (1) is divided into five electrode regions along the length direction according to the profile characteristics of the integral blade disk cascade channel, which are respectively called region A (1-A), region B (1-B), region C (1-C), region D (1-D), and region E (1-E); wherein region A and region E are clamping regions of the thin-sheet electrode (1), and loads are applied to the clamping regions to cause the thin-sheet electrode (1) to generate online deformation during the machining process, and the clamping regions of the thin-sheet electrode (1) do not participate in the electrolytic machining; The thin-sheet electrode (1) consists of a front processing surface, a rear processing surface, a left processing surface, and a right processing surface, and an insulating coating (1-F) is applied to different areas of each processing surface; The front processing surface, the left processing surface and the D area of ​​the right processing surface of the thin-sheet electrode (1) are used to process the blade back profile of the integral blade disc cascade channel. The B area and the C area of ​​the front processing surface are coated with an insulating coating and do not participate in electrolytic processing. Most of the D area of ​​the left processing surface and the right processing surface are coated with an insulating coating, but a part of the processing surface adjacent to the D area of ​​the front processing surface is left to participate in electrolytic processing to facilitate material removal. During the processing, the front processing surface is fed from the blade tip to the blade root. The C area of ​​the right processing surface of the thin-film electrode (1) is used to process the hub profile of the integral blade disk cascade channel, and the B and D areas of the right processing surface are coated with an insulating coating and do not participate in the electrolytic processing. During the processing, the right processing surface is fed along the hub direction; The rear processing surface, the left processing surface and the B area of ​​the right processing surface of the thin-film electrode (1) are used to process the blade basin profile of the integral blade disc cascade channel. The C area and the D area of ​​the rear processing surface are coated with an insulating coating and do not participate in electrolytic processing. Most of the B area of ​​the left processing surface and the right processing surface are coated with an insulating coating, but a part of the processing surface adjacent to the B area of ​​the rear processing surface is left to participate in electrolytic processing to facilitate material removal. During the processing, the rear processing surface is fed from the blade root to the blade tip. Among them, area C of the left processing surface of the thin-film electrode is used to process the blade crown surface of the closed integral blade disk blade channel. Areas B and D of the left processing surface are coated with insulating coating and do not participate in electrolytic processing. During the processing, the left processing surface is fed along the blade crown direction.

7. The closed integral blade disk cascade channel processing application of the thin-film electrode according to claim 6 is characterized in that: The following processes are included: Step 1: The thin electrode (1) is first fed from the blade tip to the blade root, and the D area of ​​the front processing surface, the left processing surface and the right processing surface is used as the processing surface for processing. During the processing, corresponding online deformation is generated according to the curvature change characteristics of the blade back profile, thereby completing the processing of the blade back profile; Step 2: The sheet electrode (1) rotates clockwise, switches to the right processing surface, and feeds in the direction of the hub, using the C area of ​​the right processing surface as the processing surface for processing, thereby completing the processing of the hub profile; Step 3: The thin electrode (1) rotates clockwise, switches to the rear processing surface, and feeds from the blade root to the blade tip. The rear processing surface, the left processing surface, and the B area of ​​the right processing surface are used as processing surfaces for processing. During the processing, corresponding online deformation is generated according to the curvature change characteristics of the blade basin profile, thereby completing the processing of the blade basin profile; Step 4: The sheet electrode (1) rotates counterclockwise, switches to the left processing surface, and feeds along the blade crown direction, using the C area of ​​the left processing surface as the processing surface for processing, thereby completing the processing of the blade crown profile.

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