Electrolytic machining process method for integral structure closed blade ring

Abstract

The invention discloses an electrolytic machining process method for an integral structure closed blade ring, which comprises the following steps that a blade basin tool cathode and a blade back tool cathode are respectively inserted into channels on two sides of an mth blade to be machined in an integral structure closed blade ring blank workpiece, m is equal to 1, 2, 3,..., n, and n is the number of the blades to be machined in the integral structure closed blade ring blank workpiece; an electrolyte is introduced into the mth to-be-machined blade area, when the mth to-be-machined blade area is filled with the electrolyte, a power source is started, the blade basin tool cathode and the blade back tool cathode are controlled to be fed in the direction of the molded surface of the mth to-be-machined blade at the same time, and machining of the mth to-be-machined blade is completed; and after machining of the mth to-be-machined blade is completed, the whole structure closed blade ring blank workpiece is rotated, the positions of the blade basin tool cathode and the blade back tool cathode are adjusted, and the steps are repeated to machine the next to-be-machined blade till machining of all the n to-be-machined blades is completed. The machining method aims at solving the problems of low machining efficiency and non-uniform blade allowance existing in machining of the closed blade ring of the overall structure, and the machining quality of the closed blade ring is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of processing a closed blade ring with an integral structure, and in particular relates to an electrolytic processing method for a closed blade ring with an integral structure. Background Art

[0002] As a key component of the new generation of aircraft engines, the performance of the integral structure closed blade ring is directly related to the overall efficiency and reliability of the engine. This type of blade ring is usually made of titanium alloy, nickel-based high-temperature alloy and a new generation of metal-based composite materials. These materials are widely used for their high specific strength, low density and excellent high temperature resistance, but at the same time, they also bring difficulties to the manufacturing process due to their difficult processing characteristics. The design feature of the closed blade ring is that its blades are wrapped by the inner and outer hubs to form a semi-closed structure. In addition, the shape of the flow channel is complex and changeable and the space is narrow, which makes the accessibility during the processing extremely poor. This not only requires the processing method to have a high degree of stability, but also to be able to effectively deal with the problem of unevenness in the material removal process.

[0003] In the prior art, a variety of processing methods have been proposed to deal with the processing difficulties of closed blade rings. For example, the publication number is CN107755987A, and the invention name is a processing method for a high-pressure compressor rectifier of an aircraft engine. The method adopts a processing flow of first rough turning the blade flow channel to remove large excess, and then rough milling and fine milling. However, due to the small and twisted blade gap of the integral blade ring, it is difficult for the tool to reach all areas, resulting in uneven removal of blade excess, affecting the processing accuracy and efficiency. To solve the above problems, the publication number is CN114871481A, and the invention name is a five-axis CNC milling method for an integral blade ring. This method completes channel milling by setting layer milling cutter rails in different areas, which effectively improves the uniformity of the blade surface excess. Despite this, the method still has shortcomings in processing efficiency, especially for the processing of difficult-to-process materials, the milling tool wears severely, which not only increases the processing cost, but also limits its wide application in industrial production. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a method for electrolytic machining of an integral structure closed blade ring, which aims to solve the problems of low machining efficiency and uneven blade remainder in the machining of the integral structure closed blade ring and to improve the machining quality of the closed blade ring.

[0005] In order to solve the above technical problems, the present invention is implemented by the following technical solutions: A method for electrolytic machining of an integral closed blade ring, comprising: Connect the blade basin tool cathode and the blade back tool cathode to the negative electrode of the power supply, and connect the integral structure closed blade ring blank workpiece to the positive electrode of the power supply; Inserting the blade basin tool cathode and the blade back tool cathode into the channels on both sides of the mth blade to be processed in the integral structure closed blade ring blank workpiece, respectively, wherein m=1,2,3,…,n, and n is the number of blades to be processed in the integral structure closed blade ring blank workpiece; Electrolyte is introduced into the mth blade area to be processed. When the mth blade area to be processed is filled with electrolyte, the power supply is started and the blade basin tool cathode and the blade back tool cathode are controlled to be fed toward the mth blade surface to be processed at the same time, so as to complete the processing of the mth blade to be processed; After completing the processing of the mth blade to be processed, the next blade to be processed is processed by rotating the overall structure closed blade ring blank workpiece and adjusting the positions of the blade basin tool cathode and the blade back tool cathode, repeating the above steps until all n blades to be processed are processed.

[0006] Furthermore, before connecting the integral structure closed blade ring blank workpiece to the positive electrode of the power supply, it also includes: The integral structure closed blade ring blank workpiece is mounted on a rotating table.

[0007] Furthermore, after the processing of the mth blade to be processed is completed, the closed blade ring blank workpiece of the overall structure is rotated and the positions of the blade basin tool cathode and the blade back tool cathode are adjusted, specifically: The blade basin tool cathode and the blade back tool cathode are withdrawn from the channels on both sides of the mth blade to be processed; The rotating table is controlled to rotate to drive the overall structure closed blade ring blank workpiece to rotate, and the rotation angle is the indexing value between the mth blade to be processed and the m+1th blade to be processed; The blade basin tool cathode and the blade back tool cathode are respectively inserted into the channels on both sides of the m+1th blade to be processed in the integral structure closed blade ring blank workpiece.

[0008] Furthermore, the feed speed of the blade basin tool cathode and the blade back tool cathode is 0.3mm / min~0.8mm / min.

[0009] Further, the electrolyte is introduced into the mth blade region to be processed, specifically: Electrolyte is introduced into the mth blade region to be processed by using an electrolyte supply system, wherein the electrolyte supply system comprises a liquid storage tank located directly below the closed blade ring blank workpiece of the integral structure, and the liquid storage tank is provided with a liquid inlet pipe and a liquid outlet pipe, and the height of the liquid outlet pipe extending into the liquid storage tank is higher than the height of the blade to be processed; The electrolyte is introduced into the liquid storage tank through the liquid inlet pipe. When the water level of the electrolyte in the liquid storage tank is greater than the height of the liquid outlet pipe extending into the liquid storage tank, the electrolyte circulates.

[0010] Furthermore, a valve is provided on the liquid inlet pipe.

[0011] Furthermore, when the blade basin tool cathode and the blade back tool cathode are respectively inserted into the channels on both sides of the mth blade to be processed in the integral structure closed blade ring blank workpiece, a liquid gap is reserved between the blade basin tool cathode and the blade back tool cathode and the corresponding blade surface to be processed.

[0012] Furthermore, the blade basin tool cathode and the blade back tool cathode are respectively mounted on a first adapter shaft and a second adapter shaft.

[0013] Furthermore, the back side of the blade basin tool cathode and the back side of the blade back tool cathode are provided with insulating material.

[0014] Furthermore, the insulating material is epoxy resin glue, and the epoxy resin glue is evenly applied to the back side of the blade basin tool cathode and the back side of the blade back tool cathode.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: The present invention provides an electrolytic machining process for an integrally structured closed blade ring. By adopting the electrolytic machining process, the problem of poor tool accessibility in traditional mechanical machining is effectively overcome. In particular, in a semi-closed structure with complex flow channels such as a closed blade ring, the electrolyte can evenly penetrate into every corner of the blade to ensure that the material removal of the blade profile is more uniform, thereby avoiding the problem of blade residues caused by the difficulty of the tool to reach, and improving the machining accuracy and surface quality of the blade profile. The machining process method of the present invention simplifies the cumbersome tool selection and replacement process in traditional mechanical machining, and realizes rapid and continuous material removal through electrolytic machining. In the electrolytic machining process of the present invention, the tool cathode is basically free of loss during the machining process and can be reused for a long time, thereby greatly reducing the tool consumption cost. In summary, the present invention solves the problems of low machining efficiency and uneven blade margin in the machining of integrally structured closed blade rings, improves machining quality, efficiency and reduces costs.

[0016] Furthermore, since electrolytic machining itself has a high material removal rate, combined with rapid clamping and machining flow, the machining cycle of the overall structure closed blade ring is shortened and production efficiency is improved.

[0017] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the specific implementation modes of the present invention, the drawings required for use in the description of the specific implementation modes will be briefly introduced below. Obviously, the drawings described below are some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a flow chart of a process method for electrolytic machining of an integral structure closed blade ring according to an embodiment of the present invention; Figure 2 This is a schematic diagram of electrolytic machining of a closed blade ring according to an embodiment of the present invention; Figure 3 It is a partial schematic diagram of the electrolytic machining of a closed blade ring according to an embodiment of the present invention.

[0020] In the figure: 1-rotating table; 2-integral structure closed blade ring blank workpiece; 3-second transfer shaft; 4-liquid inlet pipe; 5-blade back tool cathode; 6-blade basin tool cathode; 7-liquid outlet pipe; 8-liquid storage tank; 9-first transfer shaft. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Combination Figures 1 to 3 As shown, the embodiment of the present invention provides an electrolytic machining process method for an integral structure closed blade ring, which mainly improves the machining efficiency and machining accuracy of the integral structure closed blade ring by electrolytic machining, and solves the problem of uneven blade margin. This embodiment provides an electrolytic machining process method for an integral structure closed blade ring, which specifically includes the following steps: S1. Connect the blade basin tool cathode 6 and the blade back tool cathode 5 to the negative electrode of the power supply, and connect the integral structure closed blade ring blank workpiece 2 to the positive electrode of the power supply.

[0023] Specifically, the blade basin tool cathode 6 and the blade back tool cathode 5 are connected to the negative pole of the power supply of the electrolytic machining equipment through wires. At the same time, the integral structure closed blade ring blank workpiece 2 is installed on the workbench of the electrolytic machining machine and connected to the positive pole of the power supply through wires. Exemplarily, the machining power supply adopts a DC power supply or a pulse power supply.

[0024] It should be noted that the blade basin tool cathode 6 and the blade back tool cathode 5 are manufactured according to the design drawings of the overall structure closed blade ring (blade basin profile, blade back profile, inner flow channel surface and outer flow channel surface). The blade basin tool cathode 6 and the blade back tool cathode 5 correspond to the blade basin and blade back parts of the blade ring respectively. It is necessary to ensure that the shape and size of the cathode match the profile of the blade of the blade ring to achieve the best electrolytic machining effect.

[0025] S2. Insert the blade basin tool cathode 6 and the blade back tool cathode 5 into the channels on both sides of the mth blade to be processed in the integral structure closed blade ring blank workpiece 2, where m=1,2,3…,n, and n is the number of blades to be processed in the integral structure closed blade ring blank workpiece 2.

[0026] Specifically, the integral structure closed blade ring blank workpiece 2 is adjusted to a predetermined processing position through the positioning system of the electrochemical machining machine tool to ensure that the central axis of the integral structure closed blade ring blank workpiece 2 coincides with the rotation center of the machine tool to ensure the stability of the subsequent processing process. After confirming that the integral structure closed blade ring blank workpiece 2 is positioned correctly, the blade basin tool cathode 6 and the blade back tool cathode 5 are respectively inserted into the channels on both sides of the mth blade to be processed in the integral structure closed blade ring blank workpiece 2 using the automatic feeding system of the machine tool.

[0027] Preferably, the initial value of m is 1, representing the first blade to be processed.

[0028] S3. Electrolyte is introduced into the mth blade area to be processed. When the mth blade area to be processed is filled with electrolyte, the power is started and the blade basin tool cathode 6 and the blade back tool cathode 5 are controlled to feed simultaneously toward the mth blade surface to be processed to complete the processing of the mth blade to be processed.

[0029] Specifically, an appropriate amount of electrolyte is injected into the mth blade area to be processed through the electrolyte supply system of the machine tool. It should be understood that the electrolyte needs to have appropriate conductivity, viscosity and temperature to ensure the smooth progress of the electrolytic machining process. After confirming that the electrolyte has filled the area to be processed, start the power supply of the electrolytic machining equipment, and control the blade basin tool cathode 6 and the blade back tool cathode 5 to feed in the direction of the mth blade profile to be processed at the same time. At this time, under the action of electrolysis, the metal on the surface of the overall structure closed blade ring blank workpiece 2 will be gradually dissolved to form a blade profile consistent with the cathode shape.

[0030] It should be noted that during the processing, the current and voltage changes of the electrolytic machining equipment need to be monitored in real time. For example, by adjusting parameters such as the flow rate, temperature and pressure of the electrolyte, as well as the feed speed and path of the cathode, the stable processing is ensured. Using the control system of the electrolytic machining equipment, the feed speed and path of the cathode are precisely controlled according to the preset machining allowance requirements to ensure that the machining allowance of each blade is uniform and consistent, achieving the expected machining accuracy and surface quality.

[0031] S4. After completing the processing of the mth blade to be processed, the next blade to be processed is processed by rotating the overall structure closed blade ring blank workpiece 2 and adjusting the positions of the blade basin tool cathode 6 and the blade back tool cathode 5, repeating the above steps until all n blades to be processed are processed.

[0032] Specifically, after completing the processing of the mth blade to be processed, the workpiece is rotated to the position of the next blade to be processed through the rotary system of the machine tool. At this time, the value of m increases by 1, representing the next blade to be processed. According to the rotation angle of the workpiece and the position of the next blade to be processed, adjust the position and posture of the blade basin tool cathode 6 and the blade back tool cathode 5. Ensure that the cathode can be accurately inserted into the channel of the next blade to be processed and maintain good processing contact. According to the above steps, repeat the operations of electrolyte injection, processing start-up, processing process monitoring and adjustment, workpiece rotation and cathode adjustment until all n blades to be processed are completed.

[0033] The electrolytic machining process of the integral structure closed blade ring of the present invention can significantly improve the machining efficiency and machining accuracy of the integral structure closed blade ring, and solve the problem of uneven blade margin. The method has the advantages of simple operation, low machining cost, and wide application range, and is particularly suitable for machining integral structure closed blade rings of difficult-to-machine materials such as titanium alloys, nickel-based high-temperature alloys, and new generation metal-based composite materials.

[0034] In one achievable manner, before the integral structure closed blade ring blank workpiece 2 is connected to the positive electrode of the power supply, the method further includes: installing the integral structure closed blade ring blank workpiece 2 on the rotating table 1. That is, before electrolytic machining, the integral structure closed blade ring blank workpiece 2 needs to be installed on the rotating table 1. After the machining of the current blade is completed, the integral structure closed blade ring blank workpiece 2 is rotated to the position of the next blade to be machined through the control system of the rotating table 1.

[0035] In one embodiment, after completing the processing of the mth blade to be processed, the overall structure closed blade ring blank workpiece 2 is rotated and the positions of the blade basin tool cathode 6 and the blade back tool cathode 5 are adjusted, specifically: the blade basin tool cathode 6 and the blade back tool cathode 5 are withdrawn from the channels on both sides of the mth blade to be processed; the rotating table 1 is controlled to rotate to drive the overall structure closed blade ring blank workpiece 2 to rotate, and the rotation angle is the graduation value between the mth blade to be processed and the m+1th blade to be processed; the blade basin tool cathode 6 and the blade back tool cathode 5 are respectively inserted into the channels on both sides of the m+1th blade to be processed in the overall structure closed blade ring blank workpiece 2.

[0036] Specifically, after confirming that the processing is completed, the blade basin tool cathode 6 and the blade back tool cathode 5 are controlled to exit the channels on both sides of the mth blade to be processed at a stable speed. During the exit process, it is necessary to avoid collision with the workpiece to prevent damage to the cathode or the workpiece. According to the design drawings and processing requirements of the overall structure closed blade ring, the indexing value between the mth blade to be processed and the m+1th blade to be processed is calculated. The rotary table 1 is controlled to rotate according to the calculated indexing value, driving the overall structure closed blade ring blank workpiece 2 to rotate, and the stability of the rotary table must be maintained during the rotation process. After the rotary table completes the indexing and is positioned to the position of the m+1th blade to be processed, the blade basin tool cathode 6 and the blade back tool cathode 5 are controlled to be reinserted into the channels on both sides of the m+1th blade to be processed in the overall structure closed blade ring blank workpiece 2. During the insertion process, it is necessary to ensure that the cathode is closely fitted and evenly contacted with the blade profile.

[0037] For example, after the integral closed blade ring blank workpiece 2 is mounted on the rotating table 1, it is pressed and aligned, and then rotated to a suitable processing position according to the indexing of the blades.

[0038] In one feasible method, the feed speed of the blade basin tool cathode 6 and the blade back tool cathode 5 is 0.3mm / min~0.8mm / min. The setting of the feed speed takes into account both the processing efficiency and the processing quality, avoiding both the degradation of the processing surface quality due to excessively fast feeding and the excessively slow feeding resulting in excessively long processing time.

[0039] In one feasible manner, the electrolyte is introduced into the mth blade area to be processed, specifically: the electrolyte is introduced into the mth blade area to be processed by using an electrolyte supply system, the electrolyte supply system includes a liquid storage tank 8 located directly below the integral structure closed blade ring blank workpiece 2, the liquid storage tank 8 is provided with a liquid inlet pipe 4 and a liquid outlet pipe 7, the height of the liquid outlet pipe 7 extending into the liquid storage tank 8 is higher than the height of the blade to be processed; the electrolyte is introduced into the liquid storage tank 8 through the liquid inlet pipe 4, and when the water level of the electrolyte in the liquid storage tank 8 is greater than the height of the liquid outlet pipe 7 extending into the liquid storage tank 8, the electrolyte circulates.

[0040] Specifically, a liquid reservoir 8 is arranged directly below the integral structure closed blade ring blank workpiece 2 for storing and circulating electrolyte. The shape and size of the liquid reservoir 8 need to be designed according to the size and shape of the workpiece to ensure that the blade area to be processed can be completely covered. An inlet pipe 4 and an outlet pipe 7 are arranged on the wall of the liquid reservoir 8. The inlet pipe 4 is used to inject electrolyte into the liquid reservoir 8, and the outlet pipe 7 is used to discharge the electrolyte in the liquid reservoir 8 to form a cycle. The end of the inlet pipe 4 is arranged at the bottom or lower position of the liquid reservoir 8 to ensure that the electrolyte can evenly and fully fill the liquid reservoir 8. The end of the outlet pipe 7 extends into the liquid reservoir 8, but its height should be higher than the height of the blade to be processed. In this way, when the water level of the electrolyte in the liquid reservoir 8 reaches or exceeds the height of the outlet pipe 7, the electrolyte will be discharged through the outlet pipe 7 to form a cycle. The inlet pipe 4 is connected to a pump or other power device of the electrolyte supply system to provide sufficient pressure to inject the electrolyte into the liquid reservoir 8. The liquid outlet pipe 7 is connected to the other side of the electrolyte recovery device or the liquid storage tank 8 to form a closed-loop electrolyte circulation system.

[0041] Preferably, in the electrolyte circulation system, auxiliary equipment such as a filtering device and a cooling device may be provided to improve the quality of the electrolyte.

[0042] Insert the blade basin tool cathode 6 and the blade back tool cathode 5 into the channels on both sides of the blade to be processed in the integral structure closed blade ring blank workpiece 2 respectively. Start the pump or other power device of the electrolyte supply system, and inject electrolyte into the reservoir 8 through the liquid inlet pipe 4. When the water level of the electrolyte in the reservoir 8 reaches or exceeds the height of the liquid outlet pipe 7, the electrolyte begins to be discharged through the liquid outlet pipe 7 to form a cycle. At this time, start the power supply of the electrolytic machining equipment and start the machining process. The workpiece and the cathode are immersed in the electrolyte reservoir, and the electrolyte supply is sufficient and can be updated in time, which improves the stability of the precision electrolytic machining of the closed blade ring.

[0043] Better, such as Figure 2 As shown, a valve is provided on the liquid inlet pipe 4 for controlling the inflow of electrolyte. Before starting the pump or other power device of the electrolyte supply system, close the valve on the liquid inlet pipe 4 first to prevent the electrolyte from flowing into the reservoir 8 without control. After confirming that the cathode has been correctly inserted and the electrolyte supply system is ready, open the valve on the liquid inlet pipe 4 to allow the electrolyte to flow into the reservoir 8. The valve opening is adjusted according to the processing requirements to control the flow rate of the electrolyte. The flow rate ensures that the electrolyte can fully cover the blade area to be processed while avoiding waste and overflow. When the water level of the electrolyte in the reservoir reaches or exceeds the height of the liquid outlet pipe 7, the electrolyte begins to be discharged through the liquid outlet pipe to form a cycle.

[0044] In one feasible method, when the blade basin tool cathode 6 and the blade back tool cathode 5 are respectively inserted into the channels on both sides of the mth blade to be processed in the integral structure closed blade ring blank workpiece 2, a liquid gap is reserved between the blade basin tool cathode 6 and the blade back tool cathode 5 and the corresponding blade surface to be processed.

[0045] That is to say, a liquid gap is reserved between the blade basin tool cathode and the blade back tool cathode and the blade profile to be processed to control the flow of electrolyte and the processing process, thereby realizing the processing of complex blade profiles.

[0046] In one achievable manner, the blade basin tool cathode 6 and the blade back tool cathode 5 are respectively mounted on the first adapter shaft 9 and the second adapter shaft 3. Specifically, the blade basin tool cathode 6 is mounted on the first adapter shaft 9 and fixed by a locking device, and the blade back tool cathode 5 is mounted on the second adapter shaft 3 and fixed by a locking device. The feed control of the blade basin tool cathode 6 and the blade back tool cathode 5 is achieved by controlling the feed of the first adapter shaft 9 and the second adapter shaft 3.

[0047] In one achievable manner, insulating materials are provided on the back of the blade basin tool cathode 6 and the back of the blade back tool cathode 5. Specifically, in order to ensure the accuracy of electrolytic machining, it is necessary to avoid unnecessary current leakage or stray corrosion during the machining process. Therefore, insulating materials are provided on the back of the blade basin tool cathode 6 and the back of the blade back tool cathode 5. The provision of insulating materials can effectively isolate the contact between the back of the cathode and the electrolyte or other conductive components, thereby preventing the occurrence of current leakage and stray corrosion. At the same time, the insulating layer can effectively protect the processed blades, avoid secondary corrosion, and improve the consistency of the machining accuracy of the blades.

[0048] Preferably, the insulating material is epoxy resin glue, and the epoxy resin glue is evenly applied to the back side of the blade basin tool cathode 6 and the back side of the blade back tool cathode 5 .

[0049] Epoxy resin glue has extremely high resistivity and breakdown voltage, which can effectively isolate current and prevent leakage and stray corrosion. At the same time, epoxy resin glue can firmly adhere to the back of the cathode to form a tight and uniform insulation layer, which can ensure the insulation effect.

[0050] Epoxy resin glue can be applied by brushing or spraying, which is simple and quick to operate. At the same time, parameters such as viscosity and curing time can be adjusted as needed to meet different processing requirements. For example, epoxy resin glue is a viscous liquid at room temperature, evenly applied to the back area of ​​the cathode, and cured for four hours in a constant temperature drying oven at 80°C and 120°C.

[0051] It should be noted that after all the machining of the integral structure closed blade ring blank workpiece 2 is completed, the electrolytic machining power supply is disconnected, the electrolyte circulation system and the pump in the loop are turned off, the electrolyte in the reservoir is drained, and the workpiece and cathode are removed and cleaned.

[0052] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0053] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A method for electrolytic machining of an integral closed blade ring, characterized in that: include: Connecting the blade basin tool cathode (6) and the blade back tool cathode (5) to the negative electrode of the power supply, and connecting the integral structure closed blade ring blank workpiece (2) to the positive electrode of the power supply; Inserting the blade basin tool cathode (6) and the blade back tool cathode (5) into the channels on both sides of the mth blade to be processed in the integral structure closed blade ring blank workpiece (2), respectively, wherein m=1, 2, 3, ..., n, and n is the number of blades to be processed in the integral structure closed blade ring blank workpiece (2); Electrolyte is introduced into the mth blade area to be processed. When the mth blade area to be processed is filled with electrolyte, the power supply is started and the blade basin tool cathode (6) and the blade back tool cathode (5) are controlled to simultaneously feed in the direction of the mth blade surface to be processed, thereby completing the processing of the mth blade to be processed; After the processing of the mth blade to be processed is completed, the above steps are repeated to process the next blade to be processed by rotating the overall structure closed blade ring blank workpiece (2) and adjusting the positions of the blade basin tool cathode (6) and the blade back tool cathode (5) until all n blades to be processed are processed.

2. The method for electrochemical machining of an integral closed blade ring according to claim 1, characterized in that: Before the integral structure closed blade ring blank workpiece (2) is connected to the positive electrode of the power supply, the method further comprises: The integral structure closed blade ring blank workpiece (2) is mounted on the rotating table (1).

3. The electrolytic machining process of an integral structure closed blade ring according to claim 2, characterized in that: After the processing of the mth blade to be processed is completed, the closed blade ring blank workpiece (2) of the overall structure is rotated and the positions of the blade basin tool cathode (6) and the blade back tool cathode (5) are adjusted, specifically: The blade base tool cathode (6) and the blade back tool cathode (5) are withdrawn from the channels on both sides of the mth blade to be processed; Controlling the rotating table (1) to rotate and driving the overall structure closed blade ring blank workpiece (2) to rotate, the rotation angle being a graduation value between the mth blade to be processed and the m+1th blade to be processed; The blade basin tool cathode (6) and the blade back tool cathode (5) are respectively inserted into the channels on both sides of the (m+1)th blade to be processed in the integral structure closed blade ring blank workpiece (2).

4. The electrochemical machining process of an integral structure closed blade ring according to claim 1, characterized in that: The feed speed of the blade basin tool cathode (6) and the blade back tool cathode (5) is 0.3 mm / min to 0.8 mm / min.

5. The electrochemical machining process of an integral structure closed blade ring according to claim 1, characterized in that: The electrolyte is introduced into the mth blade region to be processed, specifically: Electrolyte is introduced into the mth blade region to be processed by using an electrolyte supply system, the electrolyte supply system comprising a liquid storage tank (8) located directly below the integral structure closed blade ring blank workpiece (2), the liquid storage tank (8) being provided with a liquid inlet pipe (4) and a liquid outlet pipe (7), the liquid outlet pipe (7) extending into the liquid storage tank (8) at a height higher than the height of the blade to be processed; The electrolyte is introduced into the liquid storage tank (8) through the liquid inlet pipe (4). When the water level of the electrolyte in the liquid storage tank (8) is greater than the height of the liquid outlet pipe (7) extending into the liquid storage tank (8), the electrolyte circulates.

6. The electrochemical machining process of an integral structure closed blade ring according to claim 1, characterized in that: The liquid inlet pipe (4) is provided with a valve.

7. The electrochemical machining process of an integral structure closed blade ring according to claim 1, characterized in that: When the blade basin tool cathode (6) and the blade back tool cathode (5) are respectively inserted into the channels on both sides of the mth blade to be processed in the integral structure closed blade ring blank workpiece (2), a liquid gap is reserved between the blade basin tool cathode (6) and the blade back tool cathode (5) and the corresponding blade profile to be processed.

8. The electrochemical machining process of an integral structure closed blade ring according to claim 1, characterized in that: The blade basin tool cathode (6) and the blade back tool cathode (5) are respectively mounted on a first adapter shaft (9) and a second adapter shaft (3).

9. The electrochemical machining process of an integral structure closed blade ring according to any one of claims 1 to 8, characterized in that: The back side of the blade pot tool cathode (6) and the back side of the blade back tool cathode (5) are provided with insulating material.

10. The electrochemical machining process of an integral structure closed blade ring according to claim 9, characterized in that: The insulating material is epoxy resin glue, and the epoxy resin glue is evenly applied to the back side of the blade basin tool cathode (6) and the back side of the blade back tool cathode (5).

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