In-situ deformation full-face electrochemical machining device and method for integral cathode with crown blade

Abstract

The present application relates to a kind of in situ deformation full profile electrolytic processing device and method of shrouded blade monolithic cathode, belong to the technical field of electrolytic processing.The leaf basin / back cathode body in the device is composed of cathode base (34), leaf crown edge plate cathode (32), leaf body cathode (33), tenon edge plate cathode (36), leaf crown side water retaining block (13), tenon side water retaining block (38) and upper end water retaining block (14).In processing, through driving device and deformation mechanism, two side edge plate cathodes are initially in retracted state, and leaf body profile processing is carried out;when leaf body profile processing reaches a certain depth, two side edge plate cathodes produce outward expansion movement, so that in the processing of leaf body profile, two side edge plate cathodes produce in situ swing deformation close to the profile of two side edge plate of blade, realizing full profile synchronous electrolytic processing of leaf body and two side edge plate of shrouded blade (19).The present application improves processing efficiency, processing precision and surface quality, and has good practical application prospect.

Description

Technical Field

[0001] This invention relates to an in-situ deformation full-surface electrolytic machining device and method for an integral cathode with a crown blade, belonging to the field of electrolytic machining technology. Background Technology

[0002] Crowned blade components are widely used in aviation, aerospace and other fields. They operate in harsh environments, and the quality of their manufacturing plays a crucial role in the performance of the components. These components typically have complex structures of the blade body, tenon, and crown double edge plate, twisted and thin profiles, difficult-to-process materials, many types, high quality requirements, and great processing difficulty. The efficient and precise manufacturing of the entire profile of the blade body, tenon side edge plate, and crown side edge plate has become a bottleneck problem.

[0003] Electrolytic machining is a special machining technology that removes workpiece material based on the principle of electrochemical anodic dissolution. It has advantages such as no tool wear, high machining efficiency, good surface quality, and no limitation by the hardness and strength of the anode material itself. As a supplementary technology to traditional mechanical cutting, it has become one of the mainstream manufacturing technologies for complex structural components made of difficult-to-machine materials for aero-engines. It is very suitable for the efficient and precise manufacturing of the entire profile of crowned blades made of difficult-to-machine materials.

[0004] Electrolytic machining methods for hooded blades typically employ a bidirectional feed mode with a tool cathode. However, in this method, the feed direction of the tool cathode is parallel to the two side rims of the blade, without any feed component to the side rims. There is a side gap between the rims and the tool cathode, and the rims are melted and formed from the sides. Furthermore, the pre-machined rim surface is susceptible to secondary corrosion, ultimately resulting in a certain degree of tilt (i.e., taper) in the rim profile, or even overcutting. This leads to low forming accuracy, poor surface quality, and makes it impossible to achieve efficient and precise manufacturing of the entire hooded blade profile.

[0005] To reduce the taper of the flange profile and improve forming accuracy and surface quality, the cathode sidewall is typically insulated to weaken stray electric fields. However, this method has limited effectiveness, and the flange profile still exhibits taper. Furthermore, installing an auxiliary anode on the cathode sidewall and applying a potential difference between the blade workpiece and the auxiliary anode can alter the electric field distribution and direction of the electric field lines in the side gap. This allows a portion of the pre-machined flange profile to act as a cathode, further reducing stray current corrosion on top of the cathode sidewall insulation, thus further reducing the flange profile taper. However, the electrolytic machining side forming theory dictates that these methods cannot completely eliminate the flange profile taper. Therefore, to avoid over-cutting the flange profile, it is usually necessary to reduce the cathode width, leaving a certain allowance at the flange profile, and then perform post-processing using other traditional machining methods, which is time-consuming and labor-intensive.

[0006] As can be seen from the above, in order to achieve efficient and precise electrochemical manufacturing of the entire profile of the blade body and side edge plates of the crowned blade, it is necessary to solve the problem that there is no feed component on the profile of the side edge plates during the electrochemical machining of the crowned blade, resulting in secondary stray corrosion and poor surface quality and machining accuracy. At the same time, defects such as tool marks must be avoided.

[0007] In the patent "Triaxial Flexible Feed Blade Electrolytic Machining Method" (application number 200610040556.9, applicant: Nanjing University of Aeronautics and Astronautics, inventors: Zhu Di, Xu Zhengyang, Shi Xianchuan), a blade electrolytic machining method with simultaneous triaxial feeding of the blade basin cathode, blade back cathode, and anode workpiece was proposed, which can realize the full-surface machining of single-blade blades. In comparison, this patent can realize the full-surface machining of crowned blades through the simple linear motion of an integral blade basin / back cathode and a corresponding through-shaft linear motor.

[0008] In the article "New Developments in Blade Electrolytic Machining Technology" (authors Wang Jianye and Lin Suwen, Aviation Process Technology, No. 6, 1998), it was introduced that R.R. Company of the United Kingdom used oblique feed and composite double-acting electrodes to perform full-surface machining of single-blade blades, avoiding secondary corrosion of the machined surface. In comparison, this patent uses an integral cathode that includes cathodes of both side blades and blade body, which can realize full-surface machining of crowned blades.

[0009] In the article "Optimization and Experimental Study of Flow Field in Electrolytic Machining of Double-Flanged Blades" (authors: Qian Hao, Liu Jia, Wang Hao, Zhu Di, Mechanical Manufacturing, article number 1671-5276 (2020) 02-0007-05), a multi-directional auxiliary liquid feeding flow field mode along the feed direction was proposed for electrolytic machining of double-flange blades. This mode can avoid liquid shortage, but the side flanges are side-formed, making it difficult to guarantee surface quality and machining accuracy. In contrast, this patent proposes a multi-channel collaborative liquid supply mode covering the entire surface of the side flanges and blade body, and the side flanges also have a feed 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, No. 76, 2020), a step-by-step variable parameter machining strategy and a multi-channel non-isobaric flow mode at the electrolyte inlet were proposed for the electrochemical machining of large TiAl alloy hooded blades. This strategy overcame the "mottled" morphology and flow pattern defects of the TiAl alloy hooded blade. However, the side edge plates are formed from the side, and the surface quality and machining accuracy need to be improved. In contrast, this patent can achieve simultaneous machining of the entire hooded blade surface.

[0011] In the patent "Electrolytic Machining Device and Method for Multi-Cathode Cooperative Feeding of Dual-Channel Components" (application number 202310006903.X, applicant: Nanjing University of Aeronautics and Astronautics, inventors: Zhu Dong, Chen Liyong, Zhu Di), an electrolytic machining method with three tool cathodes (left, middle, and right) cooperatively fed is proposed. The middle tool cathode is fed in a straight line, while the left and right tool cathodes slide along the middle tool cathode through inclined surfaces, realizing the joint machining of the inner and outer channels and blade body of the dual-channel component. However, tool marks are easily generated on the workpiece surface between multiple electrodes. In contrast, this patent adopts an integral design including two side edge plate cathodes and blade cathodes. Through simple straight feed, the full-surface synchronous machining of the crown blade can be achieved. The tool cathode structure and movement form are simple and easy to implement, and there are no tool mark defects.

[0012] In the patent "ELECTROCHEMICAL MACHINING METHOD AND ELECTROCHEMICAL MACHINING DEVICE" (application number 06780652.1, applicants IHI Corporation and APC Aerospecialty, inventor FUJIHARA Yasuo), two tool cathodes and three-axis three-way synchronous motion are used to achieve the machining of the two side edge plates and the full surface of the blade with crown. This method has a complex tool cathode structure and motion form, and the two tool cathodes are prone to producing tool marks on the workpiece surface. In contrast, this patent uses an integral cathode, and the full surface of the blade with crown can be synchronously machined by the simple linear motion of the machine tool spindle and the through-axis linear motor. The tool cathode structure and motion form are simple, and there are no tool marks defects.

[0013] In the patent "MULTIPART ELECTRODE ARRAY AND METHOD FOR THE ELECTROCHEMICALTREATMENT OF BLADES HAVING SHROUDING BANDS" (patent number US 9682437 B2, applicant MTU AeroEngines AG, inventor Albin Platz Daniela Arbinger), three tool cathodes are used, which slide relative to each other by means of inclined contact, thereby machining the side edge plates and blade body of the crowned blade. However, the three tool cathodes are prone to tool marks on the workpiece surface, and the motion is complex. In contrast, this patent uses an integral cathode, supplemented by simple linear motion, which can realize the synchronous machining of the entire surface of the crowned blade. The tool cathode structure and motion are simple, and there are no tool marks.

[0014] Because the blade profile of a crowned blade is almost perpendicular to the profiles of its two side fins at 90°, the feed directions of the tool cathode for the blade profile and the side fins differ significantly, posing a great challenge to the electrolytic machining of the entire blade profile. If an integral tool cathode comprising the two side fins and the blade profile could be developed, and the side fin cathodes could undergo simple oscillating deformation motions, it would undoubtedly be possible to achieve synchronous electrolytic machining of the entire blade profile without tool marks. Therefore, this invention proposes an in-situ deformation electrolytic machining apparatus and method for the entire blade profile using an integral cathode. Summary of the Invention

[0015] The purpose of this invention is to achieve synchronous, efficient and precise electrolytic machining of the entire surface of a crowned blade, avoid the generation of tool marks, and at the same time ensure the machining accuracy and surface quality of the side edge plates and blade body of the crowned blade. A device and method for in-situ deformation of the entire surface of a crowned blade using an integral cathode is proposed.

[0016] An in-situ deformation full-surface electrolytic machining device for an integral cathode with a crown blade is characterized by comprising: a blade basin / back side cathode body, a blade basin / back side drive device, and a blade basin / back side deformation mechanism; the blade basin / back side drive device includes a through-shaft linear motor, an insulating connecting plate, and a motor through-shaft; wherein the insulating connecting plate is fixed to the front side of the through-shaft linear motor, and the motor through-shaft is installed inside the through-shaft linear motor, which is driven to reciprocate linearly by the forward or reverse rotation of the through-shaft linear motor; the blade basin / back side cathode body is composed of a cathode base, a crown edge plate cathode, a blade body cathode, a tenon edge plate cathode, a crown side water-blocking block, a tenon side water-blocking block, and an upper end water-blocking block; wherein 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 rear section and a front section; the crown side water-blocking block, the tenon side water-blocking block, and the upper end water-blocking block are located above the rear section of the cathode base, wherein the lower end face of the crown side water-blocking block is connected to the left side of the rear section of the cathode base, and the tenon side water-blocking block... The lower end face of the water-blocking block is connected to the right side of the rear section of the cathode base; the upper water-blocking block is installed on top of the water-blocking block on the blade crown side and the water-blocking block on the tenon side; the aforementioned blade crown edge plate cathode, blade cathode, and tenon edge plate cathode are located above the front section of the cathode base; wherein the lower end face of the blade cathode is connected to the front end of the cathode base, the left end face of the blade cathode is connected to the front side of the blade crown edge plate cathode, and the right end face of the blade cathode is connected to the front side of the tenon edge plate cathode; the area above the aforementioned cathode base is covered by the blade crown edge plate cathode, blade cathode, and tenon edge plate cathode. The space enclosed by the plate cathode, the blade crown side water-blocking block, and the tenon side water-blocking block is called the deformation mechanism mounting cavity; the aforementioned blade basin / back side deformation mechanism is located in the deformation mechanism mounting cavity and consists of an insulating block, a push rod, a first connecting rod, and a second connecting rod; wherein 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] The method of the in-situ deformation full-surface electrolytic machining device for the integrated cathode of the crowned blade is characterized by 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; 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 as a whole on the Y1 axis of the machine tool, and the blade back-side driving device and the blade back-side cathode body are installed as a whole on the Y2 axis of the machine tool; the crowned blade fixture is installed on... Machine tool worktable; the blade blank is installed in the crowned blade fixture and pressed, then tool setting is performed, leaving a certain initial machining clearance; 3) the blade basin-side through-shaft linear motor and the blade back-side through-shaft linear motor start, the blade basin-side motor through-shaft and the blade back-side motor through-shaft move backward in a straight line, and through the pulling force of the connecting rod, the cathodes of the crown edge plate and the tenon edge plate on both sides are retracted inward to a certain position and held still; 4) the blade basin-side cathode body and the blade back-side cathode body are connected to the negative terminal of the power supply, and the blade blank is connected to the positive terminal of the power supply; 5) high voltage and high speed 6) The electrolyte flows into the processing area, covering the entire profile of the crowned blade; 7) The power is turned on, and the blade basin-side drive device and the blade basin-side cathode body, and the blade back-side drive device and the blade back-side cathode body are driven by the Y1 axis and Y2 axis of the machine tool respectively, feeding towards each other at a certain speed, gradually approaching the blade body, and the blade body profile is gradually formed under electrochemical action; 8) When the blade body profile is processed to a certain depth, the blade basin-side through-shaft linear motor and the blade back-side through-shaft linear motor start synchronously, and the linearly moving through-shaft is pushed by the push rod, the first connecting rod and the second connecting rod. The cathodes of the crown edge plate and the tenon edge plate on both sides of the blade expand outward, causing the cathodes of the two edge plates to undergo in-situ oscillating deformation close to the blade edge plate profile while machining the blade body profile. That is, the blade body and the entire profile of the two edge plates have a feed component; 8) When the Y1 axis and Y2 axis of the machine tool are fed to the final machining position, the machine tool spindle, the blade basin side through-shaft linear motor and the blade back side through-shaft linear motor stop at the same time, completing the synchronous electrolytic machining of the entire profile of the crowned blade blade body and the two edge plates, and the machining ends; 9) Turn off the power and stop the electrolyte pump from supplying liquid.

[0018] Compared with the prior art, the present invention has the following significant advantages.

[0019] An innovative cathode structure for electrolytic machining of full-surface crowned blades is designed, featuring an integral cathode with controllable deformation, including cathodes on both side rim plates and the blade body. Driven by a through-shaft linear motor, the cathodes on both side rim plates can achieve in-situ swing deformation. The structure is simple, flexible, and avoids tool marks on the surface of the anode workpiece.

[0020] (2) An innovative electrolytic machining process for the entire surface of the crowned blade is proposed. During machining, the cathode plates on both sides of the integral cathode are initially in a retracted state under the pulling force of the through-shaft linear motor. The drive device and the integral cathode are gradually moved closer to the blade body under the drive of the machine tool spindle. When the blade body surface is machined to a certain depth, the through-shaft linear motor is started synchronously. Under its thrust, the cathode plates on both sides produce an outward expansion in-situ swing deformation, so that the blade body and the two side plates of the crowned blade have a feed component, ensuring machining accuracy and surface quality, realizing synchronous, efficient and precise manufacturing of the entire surface of the crowned blade. The operation is simple and highly feasible.

[0021] (3) The present invention only requires the integral cathode and the through shaft of the through shaft linear motor to move in the horizontal direction in the plane to realize the synchronous processing of the entire surface of the crown blade. The movement form is simple and the operation is convenient.

[0022] (4) Wide range of applications: With slight adjustments to the integral cathode, this invention can also be used for the synchronous processing of the entire surface of components such as single-blade blades and crowned integral bladed disks, and has good versatility.

[0023] The integrated cathode in-situ deformation electrolytic machining device for crowned blades is characterized by the fact that the cathode base, crown edge plate cathode, blade body cathode, tenon edge plate cathode, crown side water-blocking block, and tenon side water-blocking block are all integrated into a single structure. This allows for simultaneous electrolytic machining of the entire surface profile of the crowned blade's side edge plates and blade body, improving machining efficiency and quality while avoiding tool marks.

[0024] A full-surface electrolytic machining device for in-situ deformation of a crowned blade using an integral cathode is characterized by the presence of micro-slits at both the upper and lower joints of the blade body cathode and the crown edge plate cathode, as well as at the joints of the blade body cathode and the tenon edge plate cathode. This structure reduces stress concentration at the joints and increases the flexibility of the in-situ oscillation of the two side edge plate cathodes.

[0025] An in-situ deformation full-surface electrolytic machining device for integral cathodes of blades with crowns is characterized in that: the front section of the cathode base is provided with a recessed notch to avoid interference with the crown edge plate cathode and the tenon edge plate cathode during deformation. This notch allows the cathodes of both side edge plates to freely undergo in-situ swing deformation, while preventing the cathodes of both side edge plates from colliding with the crown-side water-blocking block and the tenon-side water-blocking block.

[0026] An in-situ deformation and full-surface electrolytic machining device for integral cathodes of blades with crowns is characterized by: the outer sides of the crown edge plate cathode and the tenon edge plate cathode are inclined surfaces with a certain angle, and their thickness gradually increases from the rear end to the front end. This structure can increase the gap between the cathodes of the two side edge plates and the side edge plate surfaces of the blade blank when the side edge plate cathodes are retracted, thereby reducing secondary electrochemical corrosion of the side edge plate surfaces.

[0027] An in-situ full-surface electrolytic machining device for integral cathode deformation of crowned blades is characterized by: further comprising a crowned blade fixture, which includes a blade basin side baffle, a blade back side baffle, a crown clamping block, and a tenon clamping block; the crown clamping block and the tenon clamping block are respectively connected to the left and right sides of the fixture body; further comprising a first sidewall insulating plate connected between the blade basin side baffle and the crown clamping block, a second sidewall insulating plate connected between the crown clamping block and the blade back side baffle, a third sidewall insulating plate connected between the tenon clamping block and the blade back side baffle, and a fourth sidewall insulating plate connected between the blade basin side baffle and the tenon clamping block; and further comprising a fixture top cover, the fixture top cover being provided with an electrolyte inlet storage cavity. This device provides a clamping structure that simultaneously positions, clamps, and energizes both ends of a crowned blade. Compared with positioning, clamping, and energizing a crowned blade on one side, the clamping is more secure and reliable, avoiding tremors on one side of the cantilever of the crowned blade, improving processing stability and accuracy, while ensuring sufficient energizing area to avoid burns.

[0028] The method of the in-situ deformation full-surface electrolytic machining device for integral cathode of crowned blade is characterized by: adopting a new multi-channel coordinated liquid supply mode for the entire surface, that is, arranging multiple electrolyte channels on both side edge plates and blade body of the crowned blade, and supplying liquid through multiple electrolyte channels in coordination during machining, so that the flow field covers the entire surface of the crowned blade, improving the stability and accessibility of the flow field; at the same time, this flow field mode discretizes the machining area into multiple small flow areas, improving the uniformity of the flow field and the scouring effect. Attached Figure Description

[0029] Figure 1 A three-dimensional overall schematic diagram of a full-surface electrolytic machining device for in-situ deformation of an integral cathode with a crowned blade; Figure 2 A three-dimensional internal structure diagram of a full-surface electrolytic machining device for in-situ deformation of an integral cathode with crowned blades; Figure 3 This is a schematic diagram of an integral cathode structure with a crown blade. Figure 4 A schematic diagram of the in-situ deformation and synchronous electrolytic machining process of the entire profile of the integral cathode of the crowned blade; The labels in the diagram are as follows: 1. Blade basin side through-shaft linear motor; 2. Blade basin side insulating connecting plate; 3. Fixture top cover; 4. Electrolyte inlet storage chamber; 5. First electrolyte inlet; 6. Second electrolyte inlet; 7. Third electrolyte inlet; 8. Blade back side through-shaft linear motor; 9. Blade back side insulating connecting plate; 10. Fourth electrolyte inlet; 11. Fifth electrolyte inlet; 12. Blade basin side motor through-shaft; 13. Blade crown side water-blocking block; 14. Upper water-blocking block; 15. Fixture blade basin side water-blocking plate; 16. First side wall insulating plate; 17. Blade crown clamping block; 18. Blade crown side current-leading block; 19. Crowned blade; 20. Second side wall insulating plate. 21. Motor through shaft on the blade back side; 22. Water baffle on the blade back side of the clamp; 23. Insulating plate 3 on the third side wall; 24. Tenon clamping block; 25. Electric current block on the tenon side; 26. Clamp body; 27. Insulating plate on the fourth side wall; 28. Annular sealing gasket; 29. ​​Insulating block; 30. Push rod; 31. First connecting rod; 32. Cathode of the blade crown edge plate; 33. Cathode of the blade body; 34. Cathode base; 35. Micro-slit; 36. Cathode of the tenon edge plate; 37. Second connecting rod; 38. Water baffle on the tenon side. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings.

[0031] like Figure 1-4 As shown, the in-situ deformation and full-surface electrolytic machining method for the integral cathode of the crowned blade proposed in this invention mainly includes the following processes: 1) such as Figure 1-3 As shown, 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 drive device and the blade basin-side cathode body are installed as a whole on the Y1 axis of the machine tool, and the blade back-side drive device and the blade back-side cathode body are installed as a whole on the Y2 axis of the machine tool; the crowned blade fixture is installed on the machine tool worktable; the blade blank is installed in the crowned blade fixture and pressed, then the tool is set, leaving a certain initial machining clearance. 3) When the blade basin-side through-shaft linear motor 1 and the blade back-side through-shaft linear motor 9 are started, the blade basin-side motor through-shaft 12 and the blade back-side motor through-shaft 21 move backward in a straight line. Through the pulling force of the connecting rod, the cathodes 32 of the blade crown edge plate and the cathodes 36 of the tenon edge plate on both sides are retracted inward to a certain position and remain stationary. 4) The cathode body on the leaf basin side and the cathode body on the leaf back side are connected to the negative terminal of the power supply, and the blade blank is connected to the positive terminal of the power supply. 5) High-voltage, high-speed electrolyte flows into the processing area, covering the entire profile of the crowned blade; 6) Start the power supply. The blade basin side drive device and the blade basin side cathode body, and the blade back side drive device and the blade back side cathode body are driven by the Y1 axis and Y2 axis of the machine tool respectively and feed towards each other at a certain speed, gradually approaching the blade body. The blade body shape gradually takes shape under the electrochemical action. 7) For example Figure 4 As shown, when the blade profile is machined to a certain depth, the blade basin side through-shaft linear motor 1 and the blade back side through-shaft linear motor 9 start synchronously. The linearly moving through-shaft pushes the cathodes of the two blade crown edge plates and the tenon edge plate to generate outward expansion motion through the push rod 30, the first connecting rod 31 and the second connecting rod 37. This causes the cathodes of the two edge plates to generate in-situ swing deformation close to the blade edge plate profile while machining the blade profile. That is, the blade and the entire profile of the two edge plates have a feed component. 8) When the Y1 and Y2 axes of the machine tool are fed to the final machining position, the machine tool spindle, the blade basin side through-shaft linear motor 1 and the blade back side through-shaft linear motor 9 stop simultaneously, completing the synchronous electrolytic machining of the entire surface of the crowned blade body and the two side edge plates, and the machining ends. 9) Turn off the power and stop the electrolyte pump from supplying liquid.

Claims

1. A full-surface electrolytic machining device for in-situ deformation of a crowned blade with an integral cathode, characterized in that: Includes blade basin / backside cathode body, blade basin / backside drive device, and blade basin / backside deformation mechanism; The above-mentioned blade basin / back side drive device includes a through-shaft linear motor, an insulating connecting plate (2) and a motor through-shaft; wherein the insulating connecting plate (2) is fixed to the front side of the through-shaft linear motor, and the motor through-shaft is installed inside the through-shaft linear motor, and the through-shaft linear motor drives it to reciprocate linearly back and forth by rotating forward or reverse. The above-mentioned leaf basin / back side cathode body is composed of a cathode base (34), a leaf crown edge plate cathode (32), a leaf body cathode (33), a tenon edge plate cathode (36), a leaf crown side water-blocking block (13), a tenon side water-blocking block (38) and an upper end water-blocking block (14); The cathode base (34) is installed at the rear end on the front side of the insulating connecting plate (2); the cathode base (34) is divided into a rear section of the cathode base and a front section of the cathode base; The aforementioned crown-side water-blocking block (13), tenon-side water-blocking block (38), and upper water-blocking block (14) are located above the rear section of the cathode base. The lower end face of the crown-side water-blocking block (13) is connected to the left side of the rear section of the cathode base (34), and the lower end face of the tenon-side water-blocking block (38) is connected to the right side of the rear section of the cathode base (34). The upper water-blocking block (14) is installed on top of the crown-side water-blocking block (13) and the tenon-side water-blocking block (38). The aforementioned crown edge plate cathode (32), blade cathode (33) and tenon edge plate cathode (36) are located above the front section of the cathode base; the lower end face of the blade cathode (33) is connected to the front end of the cathode base (34), the left end face of the blade cathode (33) is connected to the front side of the crown edge plate cathode (32), and the right end face of the blade cathode (33) is connected to the front side of the tenon edge plate cathode (36); The space above the cathode base (34) and enclosed by the leaf crown edge plate cathode (32), the blade cathode (33), the tenon edge plate cathode (36), the leaf crown side water-blocking block (13), and the tenon side water-blocking block (38) is called the deformation mechanism mounting cavity; The aforementioned blade basin / back side deformation mechanism is located inside the deformation mechanism mounting cavity and consists 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 to the insulating block (29), and the front end of the push rod (30) is connected to 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 to the rear side of the blade crown edge plate cathode (32), and the front end of the second connecting rod (37) is connected to the rear side of the tenon edge plate cathode (36).

2. The in-situ deformation full-surface electrolytic machining device for integral cathode with crown blades according to claim 1, characterized in that: The cathode base (34), the leaf crown edge plate cathode (32), the blade cathode (33), the tenon edge plate cathode (36), the leaf crown side water-blocking block (13), and the tenon side water-blocking block (38) are all integrated structures.

3. The in-situ deformation full-surface electrolytic machining device for integral cathode with crown blades according to claim 2, characterized in that: At the junction of the aforementioned blade cathode (33) and the leaf crown edge plate cathode (32), and at the junction of the aforementioned blade cathode (33) and the tenon edge plate cathode (36), there are micro-slits (35) at the top and bottom of the junction.

4. The in-situ deformation full-surface electrolytic machining device for integral cathode with crown blades according to claim 2, characterized in that: The cathode base (34) is provided with a recessed notch at the front to avoid interference with the leaf crown plate cathode (32) and the tenon plate cathode (36) when they are deformed.

5. The in-situ deformation full-surface electrolytic machining device for integral cathode with crown blades according to claim 1, characterized in that: The outer sides of the leaf crown edge plate cathode (32) and the tenon edge plate cathode (36) are inclined surfaces with a certain angle, and their thickness gradually increases from the rear end to the front end.

6. The in-situ deformation full-surface electrolytic machining device for integral cathode with crown blades according to claim 1, characterized in that: It also includes a crowned blade clamp, which includes a clamp blade basin side baffle (15), a clamp blade back side baffle (22), a crown clamping block (17), and a tenon clamping block (24); the crown clamping block (17) and the tenon clamping block (24) are respectively connected to the left and right sides of the clamp body (26), and also includes a first side wall insulating plate (16) connected between the clamp blade basin side baffle (15) and the crown clamping block (17), connected to the crown clamping block. The second sidewall insulating plate (20) between the block (17) and the clamp blade back side baffle (22), the third sidewall insulating plate (23) connected between the tenon clamping block (24) and the clamp blade back side baffle (22), and the fourth sidewall insulating plate (27) connected between the clamp blade basin side baffle (15) and the tenon clamping block (24); it also includes a clamp top cover (3), which is provided with an electrolyte inlet storage chamber (4).

7. The method of the in-situ deformation full-surface electrolytic machining apparatus for integral cathode with crowned blades according to claim 1, characterized in that... The process includes the following: 1) The cathode body is divided into the blade basin side cathode body and the blade back side cathode body, the driving device is divided into the blade basin side driving device and the blade back side driving device, and the deformation mechanism is divided into the blade basin side deformation mechanism and the blade back side deformation mechanism. 2) The blade basin-side drive device and the blade basin-side cathode body are installed as a whole on the Y1 axis of the machine tool, and the blade back-side drive device and the blade back-side cathode body are installed as a whole on the Y2 axis of the machine tool; the crowned blade fixture is installed on the machine tool worktable; the blade blank is installed in the crowned blade fixture and pressed, then the tool is set, leaving a certain initial machining clearance. 3) The blade basin side through-shaft linear motor (1) and the blade back side through-shaft linear motor (9) are started. The blade basin side motor through-shaft (12) and the blade back side motor through-shaft (21) move backward in a straight line. Through the pulling force of the connecting rod, the cathodes (32) of the two blade crown edge plates and the cathodes (36) of the tenon edge plates are pulled inward to a certain position and remain stationary. 4) The cathode body on the leaf basin side and the cathode body on the leaf back side are connected to the negative terminal of the power supply, and the blade blank is connected to the positive terminal of the power supply. 5) High-voltage, high-speed electrolyte flows into the processing area, covering the entire profile of the crowned blade; 6) Start the power supply. The blade basin side drive device and the blade basin side cathode body, and the blade back side drive device and the blade back side cathode body are driven by the Y1 axis and Y2 axis of the machine tool respectively and feed towards each other at a certain speed, gradually approaching the blade body. The blade body shape gradually takes shape under the electrochemical action. 7) When the blade profile is machined to a certain depth, the blade basin side through shaft linear motor (1) and the blade back side through shaft linear motor (9) start synchronously. The through shaft of linear motion pushes the cathodes of the two blade crown edge plates and the tenon edge plate to generate outward expansion motion through the push rod (30), the first connecting rod (31) and the second connecting rod (37). This causes the cathodes of the two edge plates to generate in-situ swing deformation close to the blade edge plate profile while machining the blade profile. That is, the blade and the entire profile of the two edge plates have feed components. 8) When the machine tool Y1 axis and Y2 axis are fed to the final machining position, the machine tool spindle, the blade basin side through-shaft linear motor (1) and the blade back side through-shaft linear motor (9) stop at the same time to complete the synchronous electrolytic machining of the entire surface of the crown blade body and the two side edge plates, and the machining ends. 9) Turn off the power and stop the electrolyte pump from supplying liquid.

8. The method of the in-situ deformation full-surface electrolytic machining apparatus for integral cathode with crowned blades according to claim 7, characterized in that: A new multi-channel coordinated liquid supply mode is adopted, that is, multiple electrolyte channels are arranged on both sides of the blade (19) and the blade body. During the processing, the multiple electrolyte channels are coordinated to supply liquid, so that the flow field covers the entire surface of the blade (19), improving the stability and accessibility of the flow field. Meanwhile, this flow field mode discretizes the processing area into multiple small flow regions, improving the uniformity of the flow field and the scouring effect.

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