Full-profile electrolytic machining device and method based on in-situ deformation of integral cathode for shrouded blade

Abstract

A full-profile electrolytic machining device and method based on in-situ deformation of an integral cathode for a shrouded blade, which belong to the technical field of electrolytic machining. A blade basin / back cathode body in the device consists of a cathode base, a shroud platform cathode, a blade airfoil cathode, a tenon platform cathode, a shroud-side water blocking block, a tenon-side water blocking block and an upper-end water blocking block. During machining, by means of a driving device and a deformation mechanism, platform cathodes on two sides are enabled to be in an inwardly retracted state at the beginning, so as to machine a blade airfoil profile; and when the blade airfoil profile is machined to a certain depth, the platform cathodes on the two sides expand outwards, such that the platform cathodes on the two sides generate in-situ swinging deformation close to platform profiles on two sides of a blade while the blade airfoil profile is machined, thereby achieving synchronous full-profile electrolytic machining of a blade airfoil of a shrouded blade and platforms on two sides thereof. The device can improve the machining efficiency, machining precision and surface quality, and has relatively good practical application prospects.

Description

In-situ deformation full-surface electrochemical machining device and method for integral crown vane blade with whole cathode TECHNICAL FIELD

[0001] The present application relates to an in-situ deformation full-surface electrochemical machining device and method for integral crown vane blade with whole cathode, belonging to the technical field of electrochemical machining. BACKGROUND

[0002] Crown vane components are widely used in the fields of aviation, aerospace and the like, and the manufacturing quality thereof plays a crucial role in the performance of the components. Such components usually have complex structures of blade body, tenon and crown double edge plates, twisted and thin profile, difficult-to-machine materials, multiple types, high quality requirements and large processing difficulty, and the like. The full-surface efficient and precise manufacturing of the blade body, tenon side edge plate and crown side edge plate has become a bottleneck problem.

[0003] Electrochemical machining is a special processing technology based on the principle of electrochemical anodic dissolution to remove workpiece materials, and has the advantages of no tool wear, high processing efficiency, good processing surface quality and no limitation by the hardness and strength of the anode material itself. As a complementary technology to traditional mechanical cutting and the like, the electrochemical machining has become one of the mainstream manufacturing technologies for complex structural components of difficult-to-machine materials of an aero-engine, and is very suitable for the efficient and precise manufacturing of the full profile of a crown vane of a difficult-to-machine material.

[0004] The electrochemical machining method for a crown vane usually adopts a tool cathode bidirectional feeding mode. However, in this mode, the feeding direction of the tool cathode is parallel to the two side edge plates of the vane, and there is no feeding component for the two side edge plates. The side gap exists between the edge plate and the tool cathode, the edge plate is side dissolved and formed, and the surface of the first processed edge plate is prone to secondary corrosion, which finally results in a certain degree of inclination (i.e. taper) of the edge plate profile, even overcut, causing low forming precision and poor surface quality, and the efficient and precise manufacturing of the full profile of the crown vane cannot be achieved.

[0005] In order to reduce the taper of the edge plate profile and improve the forming precision and surface quality, the side wall of the tool cathode is usually insulated to weaken the stray electric field. However, this method has limited effect, and the taper of the edge plate profile still exists. In addition, an auxiliary anode is installed on the side wall of the cathode, and by applying a certain potential difference between the vane workpiece and the auxiliary anode, the electric field distribution of the side gap and the direction of the electric lines of force can be changed, so that the first processed edge plate profile part area acts as a cathode. On the basis of the insulation treatment of the cathode side wall, the stray current corrosion can be further reduced, and thus the taper of the edge plate profile can be further reduced. However, the electrochemical machining side forming theory determines that the taper of the edge plate profile cannot be completely eliminated by the above method. Therefore, in general, in order to avoid overcut of the edge plate profile, the width of the cathode is usually reduced, and a certain amount of allowance is left at the edge plate profile, and finally the post-processing is carried out by other traditional mechanical processing methods, which is time-consuming and laborious.

[0006] From the above, in order to realize the full-surface high-efficiency and precision electrochemical manufacturing of the blade crown and the two side edge plates of the blade, it is necessary to solve the problem of the lack of feeding component in the two side edge plate surfaces in the electrolytic machining of the blade crown, the existence of secondary stray corrosion, and the poor surface quality and machining precision, while avoiding defects such as tool marks.

[0007] In the patent "Three-axis flexible feeding blade electrolytic machining method" (application number 200610040556.9 applicant Nanjing University of Aeronautics and Astronautics, inventor Zhu Oi Xu Zhengyang Shi Xianchuan), a three-axis simultaneous feeding blade electrolytic machining method is proposed, which can realize full-surface machining of single-edge plate blades; compared with it, the whole blade / back cathode and the corresponding through-shaft linear motor simple linear motion can realize full-surface machining of the blade crown.

[0008] In the article "New development of blade electrolytic machining technology" (author Wang Jianye Lin Suwen, Aviation Technology, 1998, No. 6), the British R·R company uses oblique feeding and composite double-moving electrode to machine the full surface of single-edge plate blades, avoiding secondary corrosion of the machined surface; compared with it, the whole cathode containing two side edge plate cathodes and blade cathode can realize full-surface machining of the blade crown.

[0009] In the article "Double-edge plate blade electrolytic machining flow field optimization and experimental research" (authors Qian Hao Liu Jia Wang Hao Zhu Oi, Mechanical Manufacturing, article number 1671-5276 (2020) 02-0007-05), for the electrolytic machining of double-edge plate blades, a multi-directional auxiliary liquid feeding flow field mode along the feeding direction is proposed, which can avoid liquid deficiency, but the two side edge plate surfaces are side formed, and the surface quality and machining precision are difficult to guarantee; compared with it, the patent proposes a full-surface multi-channel collaborative liquid supply mode covering the two side edge plates and the blade, and the two side edge plate surfaces also have a feeding component.

[0010] In the article "Study on surface roughness of large size TiAl intermetallic blade in electrochemical machining" (Authors Yudi Wang Zhengyang Xu Deman Meng Lin Liu Zhongdong Fang, Journal of Manufacturing Processes, 2020, No. 76), for large TiAl alloy with crown blade blade electrolytic machining, a step-by-step variable parameter processing strategy and electrolyte inlet multi-channel non-equal pressure flow mode are proposed, which overcomes the "mottled" morphology and flow defects of TiAl alloy with crown blade blade, but the two side plate surfaces are side formed, and the surface quality and machining precision need to be improved; Compared with the above, the patent can realize synchronous machining of the whole surface of the blade with crown.

[0011] In the patent "Multi-cathode coordinated feeding double-flow channel component electrolytic machining device and method" (Application No. 202310006903.X Applicant Nanjing University of Aeronautics and Astronautics, Inventors Zhu Dong Chen Liyong Zhu Di), a left-middle-right three-tool cathode coordinated feeding electrolytic machining method is proposed, the middle tool cathode is straightly fed, the left and right tool cathodes are slidably fed by the inclined surface close to the middle tool cathode, and the inner and outer flow channels and blade of the double-flow channel component are machined together, but the multiple electrodes are prone to produce tool marks on the workpiece surface; Compared with the above, the patent adopts an integrated cathode including two side plate cathodes and blade cathodes, and through simple straight-line feeding, the whole surface of the blade with crown can be machined synchronously, the tool cathode structure and movement form are simple and easy to implement, and there is no tool mark defect.

[0012] In the patent "ELECTROCHEMICAL MACHINING METHOD AND ELECTROCHEMICAL MACHINING DEVICE" (Application No. 06780652.1 Applicant IHI Corporation and APC Aerospecialty, Inventor FUJIHARA Yasuo), two tool cathodes and three-axis three-direction synchronous movement are used to realize the whole surface machining of the two side plates and the blade of the blade with crown, the tool cathode structure and movement form are complex, and the two tool cathodes are prone to produce tool marks on the workpiece surface; Compared with the above, the patent adopts an integrated cathode, through simple same-direction straight-line movement of the machine tool spindle and the through-shaft linear motor, the whole surface of the blade with crown can be machined synchronously, the tool cathode structure and movement form are simple, and there is no tool mark defect.

[0013] In the patent "MULTIPART ELECTRODE ARRAY AND METHOD FOR THE ELECTROCHEMICAL TREATMENT OF BLADES HAVING SHROUDING BANDS" (Patent No. US 9682437 B2 Applicant MTU Aero Engines AG, Inventor Albin Platz Daniela Arbinger), three tool cathodes are used, and the relative sliding between them is realized by relying on the inclined surface contact, so as to process the two side shroud plates and the blade body of the shrouded blade, but the three tool cathodes are easy to produce tool mark defects on the surface of the workpiece, and the movement form is complex; Compared with the above, the whole type cathode is used in the patent, and simple linear motion is supplemented, so that the full surface synchronous machining of the shrouded blade can be realized, the tool cathode structure and the movement form are simple, and there is no tool mark defect.

[0014] Due to the fact that the blade body surface of the shrouded blade is almost perpendicular to the surface of the two side shroud plates, the feeding directions of the tool cathodes for the blade body surface and the two side shroud plate surfaces are greatly different, which brings great challenges to the full surface electrochemical machining of the shrouded blade. If there is a whole type tool cathode containing the two side shroud plates and the blade body, and the two side shroud plate cathodes can produce simple swing deformation movement, the full surface synchronous electrochemical machining of the shrouded blade can be realized without tool mark defects. Therefore, the application provides a whole type cathode in-situ deformation full surface electrochemical machining device and method for shrouded blades. SUMMARY

[0015] The application aims to realize the full surface synchronous high efficient precise electrochemical machining of the shrouded blade, avoid the tool mark defects, and ensure the machining precision and surface quality of the two side shroud plate surfaces and the blade body surface of the shrouded blade, and provides a whole type cathode in-situ deformation full surface electrochemical machining device and method for shrouded blades.

[0016] Specifically, the application first provides a full-surface in-situ deformation electrochemical machining device of a whole crown blade cathode, which comprises a blade basin / back cathode body, a blade basin / back driving device and a blade basin / back deformation mechanism. The blade basin / back driving device comprises a through-shaft type linear motor, an insulating connecting plate and a motor through shaft. The insulating connecting plate is fixed to the front side of the through-shaft type linear motor, and the motor through shaft is installed inside the through-shaft type linear motor and driven to move back and forth linearly by the through-shaft type linear motor. The blade basin / back cathode body comprises a cathode base, a blade crown edge plate cathode, a blade body cathode, a tenon edge plate cathode, a blade crown side water block, a tenon side water block and an upper end water block. The rear end of the cathode base is installed on the front side of the insulating connecting plate. The cathode base is divided into a cathode base rear segment and a cathode base front segment. The blade crown side water block, the tenon side water block and the upper end water block are located above the cathode base rear segment. The lower end surface of the blade crown side water block is connected to the left side of the cathode base rear segment, and the lower end surface of the tenon side water block is connected to the right side of the cathode base rear segment. The upper end water block is installed above the blade crown side water block and the tenon side water block. The blade crown edge plate cathode, the blade body cathode and the tenon edge plate cathode are located above the cathode base front segment. The lower end surface of the blade body cathode is connected to the front end of the cathode base, the left end surface of the blade body cathode is connected to the front side of the blade crown edge plate cathode, and the right end surface of the blade body cathode is connected to the front side of the tenon edge plate cathode. The space surrounded by the blade crown edge plate cathode, the blade body cathode and the tenon edge plate cathode, the blade crown side water block and the tenon side water block above the cathode base is referred to as a deformation mechanism installation cavity. The blade basin / back deformation mechanism is located in the deformation mechanism installation cavity and comprises an insulating block, a push rod, a first connecting rod and a second connecting rod. The insulating block is installed at the front end of the motor through shaft, the rear end of the push rod is connected to the insulating block, and the front end of the push rod is connected to the rear end of the first connecting rod and the rear end of the second connecting rod, respectively. The front end of the first connecting rod is connected to the rear side of the blade crown edge plate cathode, and the front end of the second connecting rod is connected to the rear side of the tenon edge plate cathode.

[0017] In the full-surface in-situ deformation electrochemical machining device of a whole crown blade cathode, the cathode base, the blade crown edge plate cathode, the blade body cathode and the tenon edge plate cathode, the blade crown side water block and the tenon side water block are integrated. The full-surface synchronous electrochemical machining of the two side edge plate profiles and the blade body of the crown blade can be realized, the machining efficiency and quality are improved, and the tool mark defect is avoided.

[0018] In the full-surface in-situ deformation electrochemical machining device of a whole crown blade cathode, micro slits are formed at the upper and lower parts of the joint between the blade body cathode and the blade crown edge plate cathode and the joint between the blade body cathode and the tenon edge plate cathode. The structure can reduce the stress concentration at the joint and increase the flexibility of the in-situ swing of the two side edge plate cathodes.

[0019] In the embodiment of the application, the front section of the cathode base is provided with a retreat gap to avoid interference with the leaf crown edge plate cathode and the tenon edge plate cathode during deformation.

[0020] In the embodiment of the application, the outer side of the leaf crown edge plate cathode and the tenon edge plate cathode is a bevel with a certain angle (0-2°), and the thickness gradually increases from the rear end to the front end. This structure can increase the gap between the two side edge plate cathodes and the two side edge plate surfaces of the blade blank during inward movement, and reduce the secondary electrochemical corrosion of the two side edge plate surfaces.

[0021] In the embodiment of the application, the device further comprises a crown blade clamp, which comprises a clamp leaf basin side water stop plate, a clamp leaf back side water stop plate, a leaf crown pressing block, and a tenon pressing block; the leaf crown pressing block and the tenon pressing block are respectively connected to the left and right sides of the clamp body; the device further comprises a first side wall insulation plate connected between the clamp leaf basin side water stop plate and the leaf crown pressing block, a second side wall insulation plate connected between the leaf crown pressing block and the clamp leaf back side water stop plate, a third side wall insulation plate connected between the tenon pressing block and the clamp leaf back side water stop plate, and a fourth side wall insulation plate connected between the clamp leaf basin side water stop plate and the tenon pressing block; the device further comprises a clamp upper cover, and the clamp upper cover is provided with an electrolyte inlet storage cavity. The device provides a clamp structure for positioning, clamping, and leading electricity at both ends of the crown blade at the same time, which is more firm and reliable than the clamp structure for positioning, clamping, and leading electricity at one end of the crown blade, avoids shaking of the cantilevered side of the crown blade, improves the processing stability and processing precision, and ensures sufficient electricity leading area and avoids burning.

[0022] Secondly, the application also provides a method of the in-situ deformation full-surface electrochemical machining device for the integral cathode of the blade with a crown, comprising the following processes: 1) the cathode body is divided into a blade-basin-side cathode body and a blade-back-side cathode body, the driving device is divided into a blade-basin-side driving device and a blade-back-side driving device, and the deformation mechanism is divided into a blade-basin-side deformation mechanism and a blade-back-side deformation mechanism; 2) the blade-basin-side driving device and the blade-basin-side cathode body are installed on a machine tool Y1 shaft as a whole, the blade-back-side driving device and the blade-back-side cathode body are installed on a machine tool Y2 shaft as a whole, the blade-with-crown clamp is installed on a machine tool workbench, the blade blank is installed in the blade-with-crown clamp and is pressed tightly, then tool setting is performed and a certain initial machining gap is left; 3) the blade-basin-side through-shaft type linear motor and the blade-back-side through-shaft type linear motor are started, the blade-basin-side motor through shaft and the blade-back-side motor through shaft move linearly backward, the two-side blade crown edge plate cathodes and the tenon edge plate cathodes are inwards retracted to a certain position by the pulling force of the connecting rod and are kept still; 4) the blade-basin-side cathode body and the blade-back-side cathode body are connected with a power supply negative pole, and the blade blank is connected with a power supply positive pole; 5) high-pressure high-speed electrolyte flows into the machining area and covers the whole profile of the blade with a crown; 6) the power supply is started, the blade-basin-side driving device and the blade-basin-side cathode body and the blade-back-side driving device and the blade-back-side cathode body are driven by the machine tool Y1 shaft and the machine tool Y2 shaft respectively and are fed towards each other at a certain speed, gradually approaching the blade body, and the blade body profile is gradually formed under the electrochemical action; 7) when the blade body profile is machined to a certain depth, the blade-basin-side through-shaft type linear motor and the blade-back-side through-shaft type linear motor are started synchronously, the linearly moving through shaft pushes the two-side blade crown edge plate cathodes and the tenon edge plate cathodes through the push rod, the first connecting rod and the second connecting rod to generate outward expansion movement, so that the blade body profile is machined while the two-side edge plate cathodes produce in-situ swing deformation close to the blade two-side edge plate profile, that is, the blade body and the two-side edge plate full profile all have a feed component; 8) when the machine tool Y1 shaft and the Y2 shaft are fed to the final machining position, the machine tool spindle, the blade-basin-side through-shaft type linear motor and the blade-back-side through-shaft type linear motor are stopped at the same time, the synchronous electrochemical machining of the blade body and the two-side edge plate full profile of the blade with a crown is completed, and the machining is finished; 9) the power supply is turned off and the electrolyte pump stops supplying liquid.

[0023] Further, in the method of the in-situ deformation full-surface electrochemical machining device for the integral cathode of the blade with a crown, a full-surface multi-channel coordinated liquid supply new mode is adopted, that is, a plurality of electrolyte channels are arranged at the two-side edge plates and the blade body of the blade with a crown, the plurality of electrolyte channels are coordinated to supply liquid during machining, the flow field covers the whole profile of the blade with a crown, the stability and accessibility of the flow field are improved, and meanwhile, the flow field mode disperses the machining area into a plurality of small flow areas, the uniformity and flushing effect of the flow field are improved.

[0024] Compared with the prior art, the device and the method provided by the application have the following beneficial effects:

[0025] (1) The application device innovates the whole surface electrolytic machining tool cathode structure of the crown blade, designs the controllable deformation of the integral cathode containing the cathode of the two side edge plates and the blade body, and drives the cathode of the two side edge plates to realize the in-situ swing deformation through the through shaft type linear motor, the structure is simple, the flexibility is good, and the tool mark on the surface of the anode workpiece can be avoided.

[0026] (2) The application innovates the whole surface electrolytic machining process method of the crown blade, during the machining, the cathode of the two side edge plates is initially in the inward state under the pulling force of the through shaft type linear motor, the driving device and the integral cathode are driven to gradually approach the blade body under the driving of the main shaft of the machine tool, when the blade body is machined to a certain depth, the through shaft type linear motor is started synchronously, the cathode of the two side edge plates is expanded outward under the action of the thrust force, so that the blade body and the two side edge plates of the crown blade have the feeding component, the machining precision and the surface quality are ensured, the whole surface synchronous high-precision manufacturing of the crown blade is realized, the operation is simple, and the realizability is strong.

[0027] (3) The application only needs the integral cathode and the through shaft type linear motor to move in the horizontal direction in the plane, so that the whole surface synchronous machining of the crown blade is realized, the movement form is simple, and the operation is convenient.

[0028] (4) The application has wide application range, the integral cathode is slightly adjusted, and the whole surface synchronous machining of components such as the single edge plate blade and the crown integral blade disc can be realized, and the application has good universality. BRIEF DESCRIPTION OF DRAWINGS

[0029] Fig. 1 is a three-dimensional overall schematic view of the in-situ deformation whole surface electrolytic machining device of the crown blade integral cathode;

[0030] Fig. 2 is a three-dimensional internal structure view of the in-situ deformation whole surface electrolytic machining device of the crown blade integral cathode;

[0031] Fig. 3 is a structure schematic view of the crown blade integral cathode;

[0032] Fig. 4 is a schematic view of the in-situ deformation whole surface synchronous electrolytic machining process of the crown blade integral cathode;

[0033] Figure label name: 1, leaf basin side through shaft type linear motor; 2, leaf basin side insulation connecting plate; 3, clamp upper cover; 4, electrolyte inlet storage cavity; 5, first electrolyte inlet; 6, second electrolyte inlet; 7, third electrolyte inlet; 8, leaf back side through shaft type linear motor; 9, leaf back side insulation connecting plate; 10, fourth electrolyte inlet; 11, fifth electrolyte inlet; 12, leaf basin side motor through shaft; 13, leaf crown side water retaining block; 14, upper end water retaining block; 15, clamp leaf basin side water retaining plate; 16, first side wall insulation plate; 17, leaf crown pressing block; 18, leaf crown side electricity leading block; 19, crown blade; 20, second side wall insulation plate; 21, leaf back side motor through shaft; 22, clamp leaf back side water retaining plate; 23, third side wall insulation plate; 24, tenon pressing block; 25, tenon side electricity leading block; 26, clamp body; 27, fourth side wall insulation plate; 28, annular sealing gasket; 29, insulation block; 30, push rod; 31, first connecting rod; 32, leaf crown edge plate cathode; 33, leaf body cathode; 34, cathode base; 35, micro gap; 36, tenon edge plate cathode; 37, second connecting rod; 38, tenon side water retaining block. DETAILED DESCRIPTION

[0034] The application will be further described in detail below in combination with specific drawings.

[0035] As shown in FIGS. 1-4, the crown blade integral cathode in-situ deformation full-surface electrochemical machining method proposed by the application mainly includes the following processes:

[0036] 1) As shown in FIGS. 1-3, the cathode body is divided into a leaf basin side cathode body and a leaf back side cathode body, the driving device is divided into a leaf basin side driving device and a leaf back side driving device, and the deformation mechanism is divided into a leaf basin side deformation mechanism and a leaf back side deformation mechanism;

[0037] 2) The leaf basin side driving device and the leaf basin side cathode body are installed on the machine tool Y1 shaft as a whole, the leaf back side driving device and the leaf back side cathode body are installed on the machine tool Y2 shaft as a whole, the crown blade clamp is installed on the machine tool worktable, the blade blank is installed in the crown blade clamp and is pressed, then the tool is aligned, and a certain initial machining gap is left; the initial angle of the outer inclined surface of the leaf crown edge plate cathode and the tenon edge plate cathode is 2° (in specific implementation, the initial angle of the inclined surface can be 0-2°).

[0038] 3) The leaf basin side through shaft type linear motor 1 and the leaf back side through shaft type linear motor 9 are started, the leaf basin side motor through shaft 12 and the leaf back side motor through shaft 21 move linearly backward, the tensile force of the connecting rod makes the two side leaf crown edge plate cathodes 32 and tenon edge plate cathodes 36 inwardly retract to a certain position and remain stationary; in this embodiment, the position is that the cathode rod moves 4 mm in the Y negative direction, at this time, the outer inclined surface angle of the leaf crown edge plate cathode and the tenon edge plate cathode is opened to 10°.

[0039] 4) The leaf basin side cathode body and the leaf back side cathode body are connected to the negative pole of the power supply, and the leaf blank is connected to the positive pole of the power supply;

[0040] 5) High-pressure and high-speed electrolyte flows into the processing area to cover the entire profile of the crown blade;

[0041] 6) Start the power supply, and the leaf basin side driving device and the leaf basin side cathode body, and the leaf back side driving device and the leaf back side cathode body are driven by the machine tool Y1 axis and the machine tool Y2 axis respectively to feed towards each other at a certain speed, gradually approaching the blade body, and the blade body profile is gradually formed under the electrochemical action;

[0042] 7) As shown in Figure 4, when the blade body profile is processed to a certain depth, the leaf basin side through shaft type linear motor 1 and the leaf back side through shaft type linear motor 9 are started synchronously, and the linear motion through shaft pushes the two side crown edge plate cathodes and the tenon edge plate cathode through the push rod 30, the first connecting rod 31 and the second connecting rod 37 to produce outward expansion movement, so that the two side edge plate cathodes produce in-situ swing deformation close to the profile of the two side edge plates of the blade while the blade body profile is processed, that is, the blade body and the two side edge plate profiles all have a feed component;

[0043] 8) When the machine tool Y1 axis and Y2 axis are fed to the final processing position, the machine tool spindle, the leaf basin side through shaft type linear motor 1 and the leaf back side through shaft type linear motor 9 are stopped at the same time, and the synchronous electrolytic processing of the blade body and the two side edge plate profiles of the crown blade is completed, and the processing is finished;

[0044] 9) Turn off the power supply and stop the electrolyte pump.

Claims

1. A crown blade integrated cathode in-situ deformation full-face electrochemical machining device, characterized in that: it comprises a leaf basin / back cathode body, a leaf basin / back driving device and a leaf basin / back deformation mechanism; the leaf basin / back driving device comprises a through-shaft type linear motor, an insulating connecting plate (2) and a motor through-shaft; the insulating connecting plate (2) is fixed to the front side of the through-shaft type linear motor, and the motor through-shaft is installed inside the through-shaft type linear motor and driven to reciprocate linearly by the forward or reverse rotation of the through-shaft type linear motor; the leaf basin / back cathode body is composed of a cathode base (34), a leaf crown edge plate cathode (32), a leaf body cathode (33), a tenon head edge plate cathode (36), a leaf crown side water block (13), a tenon head side water block (38) and an upper end water block (14); the rear end of the cathode base (34) is installed on the front side of the insulating connecting plate (2); the cathode base (34) is divided into a cathode base rear segment and a cathode base front segment; the leaf crown side water block (13), the tenon head side water block (38) and the upper end water block (14) are located above the cathode base rear segment, the lower end surface of the leaf crown side water block (13) is connected with the left side of the cathode base rear segment, and the lower end surface of the tenon head side water block (38) is connected with the right side of the cathode base rear segment; the upper end water block (14) is installed above the leaf crown side water block (13) and the tenon head side water block (38); the leaf crown edge plate cathode (32), the leaf body cathode (33) and the tenon head edge plate cathode (36) are located above the cathode base front segment; the lower end surface of the leaf body cathode (33) is connected with the front end of the cathode base (36), the left end surface of the leaf body cathode (33) is connected with the front side of the leaf crown edge plate cathode (32), and the right end surface of the leaf body cathode (33) is connected with the front side of the tenon head edge plate cathode (38); the space surrounded by the leaf crown edge plate cathode (32), the leaf body cathode (33) and the tenon head edge plate cathode (36), the leaf crown side water block (13) and the tenon head side water block (38) above the cathode base (36) is referred to as a deformation mechanism installation cavity; the leaf basin / back deformation mechanism is located in the deformation mechanism installation cavity and is composed of an insulating block (29), a push rod (30), a first connecting rod (31) and a second connecting rod (37); the insulating block (29) is installed at the front end of the motor through-shaft, the rear end of the push rod (30) is connected with the insulating block (29), and the front end of the push rod (30) is connected with the rear end of the first connecting rod (31) and the rear end of the second connecting rod (37), respectively; the front end of the first connecting rod (31) is connected with the rear side of the leaf crown edge plate cathode (32), and the front end of the second connecting rod (37) is connected with the rear side of the tenon head edge plate cathode (36). The cathode base (34), the leaf crown edge plate cathode (32), the leaf body cathode (33) and the tenon head edge plate cathode (36), the leaf crown side water block (13) and the tenon head side water block (38) are integrated structures. The leaf body cathode (33) and the leaf crown edge plate cathode (32) are combined, the leaf body cathode (33) and the tenon head edge plate cathode (36) are combined, and micro-slits (35) are formed above and below the combined parts. ​ ​ ​ ​ ​ ​ 2. The in-situ deformation full-form electrochemical machining device of the band-crown blade monolithic cathode according to claim 1, characterized in that: ​ 3. The in-situ deformation full-form electrochemical machining device of the integral cathode with the crowned blade according to claim 2, characterized in that: ​ 4. The in-situ deformation full-form electrochemical machining device of the integral crown blade cathode according to claim 2, characterized in that: The front section of the cathode base (34) is provided with a retreat gap to avoid interference with the leaf crown edge plate cathode (32) and the tenon edge plate cathode (36) when deformed.

5. The in-situ deformation full-form electrochemical machining device of the crowned blade monolithic cathode according to claim 1, characterized in that: The outer side of the leaf crown edge plate cathode (32) and the tenon edge plate cathode (36) is a bevel with a certain angle, and the thickness gradually increases from the rear end to the front end.

6. The in-situ deformation full-form electrochemical machining device of the crowned blade monolithic cathode according to claim 1, characterized in that: The crown blade clamp further comprises a clamp leaf basin side baffle (15), a clamp leaf back side baffle (22), a leaf crown pressing block (17), and a tenon pressing block (24). The leaf crown pressing block (17) and the tenon pressing block (24) are respectively connected to the left and right sides of the clamp body (26). The crown blade clamp further comprises a first side wall insulation plate (16) connected between the clamp leaf basin side baffle (15) and the leaf crown pressing block (17), a second side wall insulation plate (20) connected between the leaf crown pressing block (17) and the clamp leaf back side baffle (22), a third side wall insulation plate (23) connected between the tenon pressing block (24) and the clamp leaf back side baffle (22), and a fourth side wall insulation plate (27) connected between the clamp leaf basin side baffle (15) and the tenon pressing block (24). The crown blade clamp further comprises a clamp upper cover (3), and the clamp upper cover (3) is provided with an electrolyte inlet storage cavity (4).

7. The method of in-situ deformation of a full-face electrochemical machining device with a crown blade monolithic cathode according to claim 1, characterized in that The process comprises the following steps: 1) The cathode body is divided into a leaf basin side cathode body and a leaf back side cathode body, the driving device is divided into a leaf basin side driving device and a leaf back side driving device, and the deformation mechanism is divided into a leaf basin side deformation mechanism and a leaf back side deformation mechanism; 2) The leaf basin side driving device and the leaf basin side cathode body are installed as a whole on the machine tool Y1 shaft, the leaf back side driving device and the leaf back side cathode body are installed as a whole on the machine tool Y2 shaft, the crown blade clamp is installed on the machine tool workbench, the blade blank is installed in the crown blade clamp and is pressed, then tool setting is performed and a certain initial machining gap is left; 3) The leaf basin side through-shaft type linear motor (1) and the leaf back side through-shaft type linear motor (9) are started, the leaf basin side motor through-shaft (12) and the leaf back side motor through-shaft (21) move linearly backward, the tensile force of the connecting rod makes the two side leaf crown edge plate cathodes (32) and tenon edge plate cathodes (36) inwardly retract to a certain position and remain stationary; 4) The leaf basin side cathode body and the leaf back side cathode body are connected to the negative pole of the power supply, and the blade blank is connected to the positive pole of the power supply; 5) High-voltage high-speed electrolyte flows into the machining area and covers the entire profile of the crown blade; 6) The power supply is started, the leaf basin side driving device and the leaf basin side cathode body and the leaf back side driving device and the leaf back side cathode body are driven by the machine tool Y1 shaft and the machine tool Y2 shaft respectively and are fed towards each other at a certain speed, gradually approaching the blade body, and the blade body profile is gradually formed under the electrochemical action. 7) When the airfoil profile is machined to a certain depth, the through-shaft linear motor (1) on the concave side and the through-shaft linear motor (9) on the convex side are started synchronously, the linearly moving through-shaft pushes the cathodes of the two side crown edge plates and the tenon edge plate through the push rod (30), the first connecting rod (31) and the second connecting rod (37), generating outward expansion movement, so that the two side edge plate cathodes produce in-situ swing deformation close to the airfoil profile while the airfoil profile is machined, that is, the airfoil and the two side edge plate profiles all have a feed component; 8) When the machine tool Y1 axis and Y2 axis are fed to the final machining position, the machine tool spindle, the through-shaft linear motor (1) on the concave side and the through-shaft linear motor (9) on the convex side are stopped at the same time, completing the synchronous electrochemical machining of the airfoil and the two side edge plate profiles of the crown blade, and the machining is completed; 9) Turn off the power and stop the electrolyte pump.

8. The method of in-situ deformation of a shrouded blade integrated cathode full profile electrochemical machining apparatus according to claim 7, characterized in that: A new mode of full-surface multi-channel collaborative liquid supply is adopted, that is, multiple electrolyte channels are arranged on the two side edge plates and the airfoil part of the crown blade (19), and multiple electrolyte channels are collaboratively supplied during machining, so that the flow field covers the full profile of the crown blade (19), improving the stability and accessibility of the flow field; At the same time, this flow field mode disperses the machining area into multiple small flow areas, improving the uniformity and flushing effect of the flow field.

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