Integral blisk nesting electrical discharge machining device, machining method and electrode compensation method

Abstract

The present invention discloses an integral bladed disk nesting electrical discharge machining device and method, belonging to the technical field of electrical discharge machining processes. The present invention can effectively clamp and fix the integral bladed disk blank, and realizes the uniform distribution machining of the integral bladed disk flow channels along the circumferential direction through the positioning pins and the positioning holes designed in the fixture. The fixture is also designed with a function that can be tilted at a certain angle. According to this function, when the machining electrode moves in the vertical direction, the flow channels machined have a certain angle with the axis of the bladed disk, so as to realize the machining of the integral bladed disk flow channels. The electrode compensation method proposed by the present invention selects a long electrode at the initial stage of electrical machining, and removes the worn part of the electrode by electrical machining after the end of one machining cycle, effectively solving the problem of frequent electrode replacement in the electrical machining process, reducing the clamping error introduced by electrode replacement, saving the machining time of the integral bladed disk to a great extent, and improving the machining accuracy.

Description

Technical Field

[0001] The present invention belongs to the technical field of electrical discharge machining processes, and particularly relates to an integral blisk nesting electrical discharge machining device, a machining method, and an electrode compensation method. Background Art

[0002] New-generation aerospace equipment has the structural characteristics of being integral, lightweight, and complex, as well as material requirements of high strength, high hardness, and high heat resistance. There are problems of "difficult" machining and "even more difficult" high-efficiency machining. Electrical discharge machining technology uses high-energy heat action to remove workpiece materials. There is no mechanical contact during the machining process, and it is not restricted by the mechanical properties of the materials. It is one of the effective manufacturing methods for materials and structures such as titanium alloys, superalloys, and high-strength steels.

[0003] The key manufacturing technology of aero-engines is an important indicator for the future development of China's aero-engine industry. Traditional manufacturing processes and production models can no longer meet the requirements in aspects such as high precision, high quality, high efficiency, and high reliability in aero-engine manufacturing; advanced manufacturing technologies such as electrical discharge machining technology, electrochemical machining technology, additive manufacturing technology, and precision casting technology have begun to be used in the manufacturing process of aero-engines.

[0004] The integral aero-engine blisk has the advantages of a compact structure, good reliability, small mass, and large thrust, and has become a major trend in the design and manufacturing of aero-engines. However, the integral aero-engine blisk has a complex structure, poor machinability of the material, and extremely high machining difficulty. The bottleneck of manufacturing technology restricts the development of integral blisks. Electrical discharge machining technology is a multi-method manufacturing for integral engine blisks, and the machining is not restricted by the material and structure of the blisk. For the electrical discharge machining of integral blisks, a new type of blisk fixture has been designed.

[0005] During the machining process of the integral blisk flow channel, due to the large number of blisk flow channels and the problem of electrical machining electrode wear, ordinary machining methods need to frequently replace the electrode to ensure the machining quality. Therefore, new errors will inevitably be introduced during the electrode disassembly and clamping process, affecting the machining quality of the blisk. To address this problem, a new type of electrode compensation method has been proposed. Summary of the Invention

[0006] To solve the deficiencies in the existing scenarios, the purpose of the present invention is to provide an integral blisk nesting electrical discharge machining device, a machining method, and an electrode compensation method. The blisk fixture ensures the requirements for machining the integral blisk flow channel, and the electrode compensation method greatly saves the nesting machining time and further ensures the improvement of machining accuracy.

[0007] To achieve the above technical objectives, the technical solution adopted by the present invention is as follows:

[0008] The integral blisk nesting electrical discharge machining device includes a long electrode for machining the integral blisk, an integral blisk fixture device, and a compensation device. The long electrode for machining the integral blisk is used to vertically feed the integral blisk blank and machine an integral blisk flow passage on the integral blisk blank, making the integral blisk blank into an integral blisk. The integral blisk fixture device is used to clamp the integral blisk blank. The integral blisk fixture device includes a positioning disk, a swing disk, a chassis, a positioning pin, and an adjusting column. The integral blisk blank is fixed on the upper surface of the positioning disk. The positioning disk is provided with equally spaced positioning holes. The swing disk is provided with a swing disk limit hole. The positioning pin can pass through the positioning hole and the swing disk limit hole at the same time to position the positioning disk on the swing disk. One end of the chassis is provided with a base swing track. The base swing track is an arc-shaped track with arc scales. The middle of the bottom of the swing disk is provided with a fixed ear with a height. The fixed ear is hinged to the chassis through a connecting shaft. The two ends of the swing disk can rotate relative to the chassis with the connecting shaft as the axis. One end of the swing disk is provided with a tightening bolt. The tightening bolt passes through the base swing track. The adjusting column passes through the other end of the swing disk and is slidably matched with the swing disk. The lower end of the adjusting column abuts against the upper surface of the chassis. The adjusting column can drive the swing disk to rotate with the connecting shaft as the axis. The tightening bolt can fixedly connect the swing disk and the base swing track. The adjusting column and the tightening bolt cooperate to fix the swing disk and the chassis to each other at a predetermined angle. The compensation device is used to grind the end of the motor of the long electrode for machining the integral blisk flat.

[0009] To achieve the above technical objectives, the technical solution adopted by the present invention is as follows:

[0010] The above-mentioned long electrode for machining the integral blisk is a long electrode with a cavity inside and an outer cross-sectional shape adapted to the shape of the integral blisk flow passage.

[0011] The center of the above-mentioned integral blisk blank has a through hole. The middle of the positioning disk is provided with a central shaft. The through hole of the integral blisk blank can be inserted into the central shaft of the positioning disk. The fixing nut of the integral blisk blank and the positioning disk is screwed on the central shaft to fix the integral blisk blank and the positioning disk to each other.

[0012] A gasket is provided between the above-mentioned positioning disk and the integral blisk blank. The gasket makes a gap between the positioning disk and the integral blisk blank. This gap is used to leave a feed space for the long electrode for machining the integral blisk.

[0013] The central shaft of the above-mentioned positioning disk has an axially penetrating hole. The middle of the upper surface of the swing disk is provided with a swing disk central shaft. The swing disk central shaft passes through the axially penetrating hole. The fixing nut of the positioning disk and the swing disk is screwed on the swing disk central shaft to position the positioning disk and the swing disk relative to each other.

[0014] The above-mentioned compensation device includes a disk-shaped copper electrode and a motor connected to the disk-shaped copper electrode. The end of the long electrode for machining the integral blisk can be placed on the surface of the disk-shaped copper electrode. The motor drives the disk-shaped copper electrode to rotate at a high speed to grind the end of the long electrode for machining the integral blisk flat.

[0015] The above-mentioned chassis is fixedly connected to the electric discharge machining tool by bolts.

[0016] The integral blisk nesting electric discharge machining method, applying the above-mentioned integral blisk nesting electric discharge machining device, includes the following steps:

[0017] Step 1: First, fix the integral blisk blank together with the positioning disk. Connect the positioning disk, gasket, and integral blisk blank in the order from bottom to top through the central axis of the positioning disk. Then, fit the fixing nut of the integral blisk blank and the positioning disk with the thread at the top of the central axis to clamp the integral blisk blank and the positioning disk.

[0018] Step 2: Connect the positioning disk to the turntable through the turntable central axis. Align one of the positioning holes of the positioning disk with the turntable limit hole on the turntable. Insert the positioning pin into the positioning hole and the turntable limit hole to limit the positioning disk and prevent it from rotating. Screw the fixing nut of the positioning disk and the turntable onto the turntable central axis to fix the positioning disk and the turntable to each other.

[0019] Step 3: Turn the adjusting column to make the turntable swing. Observe the angle value on the base swing track of the chassis. Stop turning the adjusting column when the required angle is reached, and tighten the tightening bolt to fix the turntable.

[0020] Step 4: Fix the chassis to the electric discharge machining tool;

[0021] Step 5: Operate the electric discharge machining tool to make the long electrode for machining the integral blisk move up and down on the electric discharge machining tool to machine the integral blisk blank.

[0022] Step 6: After machining an integral blisk flow channel on the integral blisk blank by the long electrode for machining the integral blisk, loosen the fixing nut of the positioning disk and the turntable, pull out the positioning pin from the positioning hole and the turntable limit hole, rotate the positioning disk by a predetermined angle around the turntable central axis to align the next positioning hole with the turntable limit hole. At the same time, the compensation device grinds the motor end of the long electrode for machining the integral blisk.

[0023] Step 7: Repeat Steps 2 to 6 until all integral blisk flow channels are machined to obtain the integral blisk.

[0024] The electrode compensation method, applying the above-mentioned integral blisk nesting electric discharge machining device, includes the following steps:

[0025] Step a: Clamp the long electrode for machining the integral blisk on the electric discharge machining tool and perform nesting machining on the integral blisk blank.

[0026] Step b: After machining an integral blisk flow channel, there is wear on the long electrode for machining the integral blisk, and the lower end of the long electrode for machining the integral blisk shows an uneven state.

[0027] Step c: Operate the electric discharge machining tool to move the long electrode for machining the integral blisk to the compensation device. Start the motor to make the disk-shaped copper electrode rotate at a high speed. Feed the lower end of the long electrode for machining the integral blisk towards the surface of the disk-shaped copper electrode. The disk-shaped copper electrode performs removal machining on the lower surface of the long electrode for machining the integral blisk, and grinds and compensates the lower surface of the long electrode for machining the integral blisk.

[0028] Step d: Operate the electric discharge machining tool and use the compensated long electrode for machining the integral blisk to perform the next nesting machining on the integral blisk blank.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] 1. The fixture device designed in the present invention effectively solves the indexing problem in the machining of the integral blisk flow channel of the engine, and can perform precise positioning in the circumferential direction during the machining process.

[0031] 2. The fixture device designed in the present invention effectively solves the problem of the inclination of the integral blisk flow channel of the engine, enabling the machining of a flow channel with a certain inclination angle when the electrode can only move in the vertical direction.

[0032] 3. The method of electrode compensation proposed in the present invention during the machining of the integral blisk effectively avoids the frequent replacement of the electrode during the machining process, greatly reduces the machining time of the integral blisk and improves the machining accuracy. Description of the Drawings

[0033] Figure 1 is a schematic diagram of the integral blisk blank on the fixture device for machining the long electrode of the integral blisk of the present invention;

[0034] Figure 2 is a schematic diagram of the disk-shaped copper electrode for machining and compensating the long electrode of the integral blisk;

[0035] Figure 3 is a schematic diagram of the integral blisk obtained after the long electrode for machining the integral blisk has machined the integral blisk blank twelve times in the embodiment;

[0036] Figure 4 is a front-back comparison diagram of the integral blisk blank machined into an integral blisk;

[0037] Figure 5 is a schematic diagram of the integral blisk fixture device Figure 1 ;

[0038] Figure 6 is a schematic diagram of the integral blisk fixture device Figure 2 ;

[0039] Figure 7 is an exploded view of the structure of the integral blisk fixture device;

[0040] Figure 8 It is a schematic installation diagram of the blisk blank and the positioning disk.

[0041] The reference numerals are: 1, the long electrode for machining the blisk; 2, the electrode with loss after machining; 3, the blisk fixture device; 4, the loss part of the electrode; 5, the disk-shaped copper electrode; 6, the compensated long electrode; 7, the electrode with loss after the second machining; 8, the electrode with loss after the third machining; 9, the electrode with loss after the twelfth machining; 10, the blisk blank; 11, the blisk; 12, the blisk flow channel; 13, the positioning disk; 14, the first fixing nut; 15, the second fixing nut; 16, the rocking disk; 17, the chassis; 18, the positioning pin; 19, the adjusting column; 20, the connecting shaft; 21, the tightening bolt; 22, the positioning device; 23, the base rocking channel; 24, the gasket; 25, the positioning hole. Specific embodiments

[0042] The following further describes the embodiments of the present invention in detail with reference to the accompanying drawings.

[0043] It should be noted that the terms such as "upper", "lower", "left", "right", "front", "rear", etc. cited in the invention are only for the convenience of clear narration and are not used to limit the scope of implementation of the present invention. The change or adjustment of their relative relationship, without substantial change in the technical content, should also be regarded as the scope of implementation of the present invention.

[0044] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments:

[0045] As Figure 1 shown, the blisk blank 10 is clamped using the blisk fixture device 3, and the blisk blank 10 is machined using the long electrode 1 for machining the blisk. After machining a blisk flow channel 12, an electrode with loss is obtained, and its loss part will affect the subsequent machining of the blisk.

[0046] As Figure 2 shown, electrode compensation is performed on the electrode with loss after machining. A disk-shaped copper electrode 5 that can rotate at high speed is designed on the electric discharge machine tool, and electrical discharge machining is performed on the loss part of the electrode, so as to remove the loss part of the electrode, and thus obtain a long electrode 1 for machining the blisk that can be normally processed.

[0047] As Figure 3As shown, it is the entire process of blisk machining. After machining a blisk flow channel 12, the positioning disk 13 is used to rotate the blisk blank 10. After rotating a certain angle (taking 30° as an example for this device), the positioning disk 13 is fixed, and then the blisk is machined. After machining the second blisk flow channel 12, electrode compensation is performed on the machined long electrode, and the above operations are repeated until the last blisk flow channel 12 is machined, and the blisk machining is completed.

[0048] As Figure 4 shown, the goal to be achieved by the present invention is to machine the blisk blank 10 into a blisk 11, and use the long electrode 1 for blisk machining to machine the blisk flow channel 12.

[0049] As Figures 5 - 6 shown, a blisk fixture device 3 for the machining of a blisk nesting by electrical discharge machining of an engine. The chassis 17 is connected to the electrical discharge machine tool through its four bolt holes and fixed by bolts. The blisk fixture device 3 uses the swing disk 16 to achieve a certain angle of inclination. The swing disk 16 is positioned with the chassis 17 through a fixed shaft. A threaded hole is designed at the rear of the swing disk 16, and an adjusting column 19 is connected. By rotating the adjusting column 19, a certain angle of swing of the swing disk 16 is achieved, and the swing disk 16 and the base swing track 23 on the chassis 17 are fixed by a tightening bolt 21.

[0050] As Figure 7 shown, the angle through which the swing disk 16 rotates is marked on the base swing track 23 on the chassis 17, and the angle range is 0° to 25°. The positioning disk 13 is connected to the swing disk 16 through the central axis of the swing disk. Then, through the thread at the top of the central axis of the swing disk 16, the positioning disk 13 is clamped and fixed on the swing disk 16 using a fixing nut. The positioning disk 13 is rotationally positioned with the positioning hole 25 through a positioning pin 18.

[0051] As Figure 8 shown, the gasket 24, the blisk blank 10 and the positioning disk 13 are connected through the central axis of the positioning disk, and are clamped and fixed by connecting with the corresponding fixing nut through the thread at the top of the central axis. The gasket 24 between the blisk blank 10 and the positioning disk 13 is mainly to leave a certain gap between the blisk blank 10 and the positioning disk 13 to solve the problem of electrode feed during the machining process.

[0052] As Figures 5 - 7 shown, the positioning in the circumferential direction during the blisk machining process is mainly completed by the positioning disk 13. There are twelve uniformly distributed tapered holes on the positioning disk, and the interval between each tapered hole is 30°. It is connected and positioned with the tapered positioning hole on the swing disk 16 through the positioning pin 18, and then clamped and fixed by bolts.

[0053] Integral blisk nesting electrical discharge machining method, comprising the following steps:

[0054] Step 1: First, fix the integral blisk blank 10 and the positioning disk 13 together. Connect the positioning disk 13, the gasket 24, and the integral blisk blank 10 in the order from bottom to top through the central axis of the positioning disk 13. Then, mate the second fixing nut 15 with the thread at the top of the central axis to clamp the integral blisk blank 10 and the positioning disk 13.

[0055] Step 2: Connect the positioning disk 13 to the turntable 16 through the turntable central axis. Coincide one of the positioning holes 25 on the positioning disk 13 with the turntable limit hole on the turntable. Insert the positioning pin 18 into the positioning hole 25 and the turntable limit hole to limit the positioning disk 13 to prevent it from rotating. Screw the first fixing nut 14 onto the turntable central axis to fix the positioning disk 13 and the turntable 16 to each other.

[0056] Step 3: Turn the adjusting column 19 to make the turntable 16 swing. Observe the angle value on the base swing track 23 of the chassis 17. Stop turning the adjusting column 19 when the required angle is reached, and tighten the tightening bolt 21 to fix the turntable 16.

[0057] Step 4: Fix the chassis 17 to the electrical discharge machine tool.

[0058] Step 5: Operate the electrical discharge machine tool to make the integral blisk long electrode 1 on the electrical discharge machine tool move up and down to machine the integral blisk blank 10.

[0059] Step 6: After machining an integral blisk runner 12 on the integral blisk blank 10 by the integral blisk long electrode 1, loosen the first fixing nut 14, pull out the positioning pin 18 from the positioning hole 25 and the turntable limit hole, rotate the positioning disk 13 by a predetermined angle around the turntable central axis to make the next positioning hole 25 coincide with the turntable limit hole. At the same time, the compensation device grinds the motor end of the integral blisk long electrode 1.

[0060] Step 7: Repeat steps 2 to 6 until all integral blisk runners 12 are machined to obtain the integral blisk 11.

[0061] Electrode compensation method, comprising the following steps:

[0062] Step a: Clamp the integral blisk long electrode 1 on the electrical discharge machine tool to perform nesting machining on the integral blisk blank 10.

[0063] Step b: After machining an integral blisk runner, there is wear on the integral blisk long electrode 1, and the lower end of the integral blisk long electrode 1 presents an uneven state.

[0064] Step c: Operate the electric discharge machining tool to move the long electrode 1 for machining the integral blisk to the compensation device. Start the motor to make the disk-shaped copper electrode 5 rotate at a high speed. Feed the lower end of the long electrode 1 for machining the integral blisk towards the surface of the disk-shaped copper electrode 5. The disk-shaped copper electrode 5 performs removal machining on the lower surface of the long electrode 1 for machining the integral blisk, and grinds and compensates the lower surface of the long electrode 1 for machining the integral blisk until it is flat.

[0065] Step d: Operate the electric discharge machining tool, and use the compensated long electrode 1 for machining the integral blisk to perform the next nesting machining on the integral blisk blank 10.

[0066] Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic creative concept. Therefore, the appended claims are intended to be construed as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0067] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

1. An integral blisk nesting electrical discharge machining device, characterized in that It includes a long electrode (1) for machining an integral blisk, an integral blisk fixture device (3) and a compensation device. The long electrode (1) for machining an integral blisk is used for vertically feeding an integral blisk blank (10), machining an integral blisk flow channel (12) on the integral blisk blank (10), and turning the integral blisk blank (10) into an integral blisk (11). The integral blisk fixture device (3) is used for clamping the integral blisk blank (10). The integral blisk fixture device (3) includes a positioning disk (13), a rocking disk (16), a chassis (17), a positioning pin (18) and an adjusting column (19). The integral blisk blank (10) is fixed on the upper surface of the positioning disk (13). The positioning disk (13) is provided with equally spaced positioning holes (25). The rocking disk (16) is provided with a rocking disk limit hole. The positioning pin (18) can pass through the positioning hole (25) and the rocking disk limit hole at the same time to position the positioning disk (13) on the rocking disk (16). One end of the chassis (17) is provided with a base rocking track (23). The base rocking track (23) is an arc-shaped track with arc graduations. The middle of the bottom of the rocking disk (16) is provided with a fixed ear with a height. The fixed ear is hinged to the chassis (17) through a connecting shaft (20). The two ends of the rocking disk (16) can rotate relative to the chassis (17) with the connecting shaft (20) as the axis. One end of the rocking disk (16) is provided with a tightening bolt (21). The tightening bolt (21) passes through the base rocking track (23). The adjusting column (19) passes through the other end of the rocking disk (16) and is slidably matched with the rocking disk (16). The lower end of the adjusting column (19) abuts against the upper surface of the chassis (17). The adjusting column (19) can drive the rocking disk (16) to rotate with the connecting shaft (20) as the axis. The tightening bolt (21) can fixedly connect the rocking disk (16) and the base rocking track (23). The adjusting column (19) and the tightening bolt (21) cooperate to fix the rocking disk (16) and the chassis (17) at a predetermined angle to each other. The compensation device is used for grinding the motor end of the long electrode (1) for machining an integral blisk.

2. The integral blisk nesting electrical discharge machining device according to claim 1, wherein The long electrode (1) for machining an integral blisk is a long electrode with a cavity inside and an outer cross-sectional shape adapted to the shape of the integral blisk flow channel (12).

3. The blisk nesting electrical discharge machining device according to claim 2, characterized in that, The center of the integral blisk blank (10) has a through hole. The middle of the positioning disk (13) is provided with a central shaft. The through hole of the integral blisk blank (10) can be inserted into the central shaft of the positioning disk (13). A second fixing nut (15) is screwed on the central shaft to fix the integral blisk blank (10) and the positioning disk (13) to each other.

4. The blisk nesting electrical discharge machining device according to claim 3, characterized in that, A gasket (24) is padded between the positioning disk (13) and the integral blisk blank (10). The gasket (24) makes a gap between the positioning disk (13) and the integral blisk blank (10). This gap is used to leave a feed space for the long electrode (1) for machining an integral blisk.

5. The blisk nesting electrical discharge machining device according to claim 4, characterized in that The central axis of the positioning disk (13) has an axially penetrating hole. In the middle of the upper surface of the rocking disk (16), a central axis of the rocking disk is provided. The central axis of the rocking disk passes through the axially penetrating hole, and a first fixing nut (14) is screwed onto the central axis of the rocking disk to position the positioning disk (13) and the rocking disk (16) relative to each other.

6. The blisk nesting electrical discharge machining device according to claim 1, wherein The compensation device includes a disk-shaped copper electrode (5) and a motor connected to the disk-shaped copper electrode (5). The end of the integral blisk long electrode (1) for machining can be placed on the surface of the disk-shaped copper electrode (5), and the motor drives the disk-shaped copper electrode (5) to rotate at a high speed to grind the end of the integral blisk long electrode (1) for machining.

7. The integral blisk nesting electrical discharge machining device according to claim 1, characterized in that The chassis (17) is fixedly connected to the electric discharge machining machine by bolts.

8. The method for electrical discharge machining of blisk nesting, characterized in that Applying the integral blisk nesting electrical discharge machining device as claimed in claim 5, includes the following steps: Step 1: First, fix the integral blisk blank (10) and the positioning disk (13) together. Connect the positioning disk (13), the gasket (24), and the integral blisk blank (10) in order from bottom to top through the central axis of the positioning disk (13). Then, match the second fixing nut (15) with the thread at the top of the central axis to clamp the integral blisk blank (10) and the positioning disk (13). Step 2: Connect the positioning disk (13) to the rocking disk (16) through the central axis of the rocking disk. Align one of the positioning holes (25) of the positioning disk (13) with the rocking disk limit hole on the rocking disk. Insert the positioning pin (18) into the positioning hole (25) and the rocking disk limit hole to limit the positioning disk (13) and prevent it from rotating. Screw the first fixing nut (14) onto the central axis of the rocking disk to fix the positioning disk (13) and the rocking disk (16) relative to each other. Step 3: Turn the adjusting column (19) to make the rocking disk (16) swing. Observe the angle value on the base rocking track (23) of the chassis (17). When the required angle is reached, stop turning the adjusting column (19) and tighten the tightening bolt (21) to fix the rocking disk (16). Step 4: Fix the chassis (17) to the electric discharge machining machine. Step 5: Operate the electric discharge machining machine to make the integral blisk long electrode (1) located on the electric discharge machining machine move up and down to machine the integral blisk blank (10). Step 6: After machining an integral blisk flow channel (12) on the integral blisk blank (10) by the integral blisk long electrode (1) for machining, remove the first fixing nut (14), pull out the positioning pin (18) from the positioning hole (25) and the rocking disk limit hole, and rotate the positioning disk (13) by a predetermined angle around the central axis of the rocking disk to align the next positioning hole (25) with the rocking disk limit hole. At the same time, the compensation device grinds the motor end of the integral blisk long electrode (1) for machining. Step 7: Repeat steps 2 to 6 until all the integral blisk flow channels (12) are machined to obtain the integral blisk (11).

9. Electrode compensation method, characterized in that, Applying the integral blisk nesting electrical discharge machining device as claimed in claim 6, includes the following steps: Step a: Clamp the integral blisk long electrode (1) for machining on the electric discharge machining machine and perform nesting machining on the integral blisk blank (10). Step b: After machining a whole blisk flow path (12), there is wear in machining the whole blisk long electrode (1), and the lower end of the whole blisk long electrode (1) presents an uneven state. Step c: Operate the electro-discharge machining machine tool to move the whole blisk long electrode (1) to the compensation device. Start the motor to make the disc-shaped copper electrode (5) rotate at high speed, feed the lower end of the whole blisk long electrode (1) towards the surface of the disc-shaped copper electrode (5), and the disc-shaped copper electrode (5) performs removal machining on the lower surface of the whole blisk long electrode (1) to grind and compensate the lower surface of the whole blisk long electrode (1). Step d: Operate the electro-discharge machining machine tool and use the compensated whole blisk long electrode (1) to perform the next nesting machining on the whole blisk blank (10).

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