Processing method and clamping tool for overall closed stator vane ring vane profile

Abstract

The application discloses a machining method of an integral closed static vane ring vane profile. After a part base body to be machined is obtained, a space angle A and a space angle C are determined when a vertical projection area of each cavity base body to be cut on the part base body to be machined is maximum, the part base body to be machined is clamped and fixed on a punching device according to the space angle A and the space angle C, wire cutting guide holes are machined on each cavity base body to be cut, the part base body to be machined is clamped and fixed on a wire cutting lathe according to the space angle A and the space angle C, a molybdenum wire is guided through the wire cutting guide holes, each cavity base body to be cut is cut off by wire cutting, a part semi-finished product is obtained, and finally, the part semi-finished product is finished to obtain a part. The application also discloses a clamping tool for clamping the part base body to be machined in the machining method of the integral closed static vane ring vane profile.

Description

Technical Field

[0001] This invention relates to the field of aero-engine parts machining technology, and in particular, to a machining method for an integral closed stator ring blade. Furthermore, it also relates to a clamping fixture used in the aforementioned machining method for the integral closed stator ring blade. Background Technology

[0002] The integral closed stator ring is a commonly used stator component in aero-engines, serving as a guide for airflow. Made of high-temperature alloy, the integral closed stator ring consists of an inner ring, an outer ring, and blades, forming a thin-walled structure. Current roughing methods for integral closed stator rings involve first sequentially milling the cavities on both sides using multi-axis linkage, then connecting the cavities to achieve the rough machining of the blade profile. However, this multi-axis linkage roughing method suffers from drawbacks. Due to the complex surface of the stator ring, poor channel openness, and narrow internal blade cavities, only small-diameter milling cutters can be used. This leads to frequent tool vibrations, severe tool wear, and the need for multiple removals of machining allowances from the cavities. The process is complex, inefficient, and costly. Summary of the Invention

[0003] This invention provides a machining method for an integral closed stationary blade ring type, which solves the technical problems of severe tool consumption, low machining efficiency and high machining cost during the roughing of existing integral closed stationary blade ring types.

[0004] According to one aspect of the present invention, a method for processing an integral closed stationary blade ring blade is provided. The part substrate to be processed includes angular holes for angular orientation and a plurality of cavity substrates to be removed arranged circumferentially. The method includes the following steps: S1, obtaining the part substrate to be processed, and determining the spatial angle A and spatial angle C when the vertical projection area of ​​each cavity substrate to be removed on the part substrate to be processed is maximized, wherein spatial angle A is the inclination angle between the mounting edge of the part and the horizontal direction, and spatial angle C is the circumferential angle between the cavity substrate to be removed and the angular hole on the part to be processed; S2, according to the cavity substrate to be removed... S3. The space angles A and C corresponding to the cavity substrate are used to clamp the part substrate to be processed on the drilling device to maximize the vertical projection area of ​​the cavity substrate to be removed, and then wire cutting guide holes are machined on the cavity substrate to be removed; S4. The part substrate to be processed is clamped on the wire cutting lathe according to the space angles A and C corresponding to the cavity substrate to be removed to maximize the vertical projection area of ​​the cavity substrate to be removed, and then the cavity substrate to be removed is removed by wire cutting through the wire cutting guide holes to obtain a semi-finished part; S5. The semi-finished part is finished to obtain a finished part.

[0005] As a further improvement to the above technical solution:

[0006] Further, the steps of determining the spatial angles A and C when the vertical projection area of ​​the cavity substrate to be removed on the substrate of the part to be processed is maximized specifically include the following steps: multiple circular holes tangent to two adjacent blades are set on the surface of the cavity substrate to be removed. Then, according to the preset angles α and r, the substrate of the part to be processed is rotated 90°-α around the horizontal plane. Then, multiple circular holes are projected every time the preset angle is increased or decreased between (90°-α)±r, until the vertical projection area of ​​the multiple circular holes is maximized. The inclination angle between the mounting edge of the part and the horizontal direction is the spatial angle A, and the circumferential angle between the cavity substrate to be removed and the angular hole is the spatial angle C. Wherein, α is the inclination angle between the blade root near the outer ring in the substrate of the part to be processed and the horizontal direction, and r is the inclination angle between the blade root near the inner ring and the blade root near the outer ring in the substrate of the part to be processed.

[0007] Furthermore, the diameter of the wire cutting guide hole is between Φ0.3mm and Φ3mm.

[0008] Furthermore, the diameter of the wire cutting guide hole is Φ3mm.

[0009] Furthermore, the distance between the wire cutting guide hole and the nearest blade is L, and the value of L is between 1mm and 2mm.

[0010] Further, step S2 specifically includes the following steps: S201, clamping the part base to be processed on the drilling device according to the spatial angles A and C corresponding to one of the cavity bases to be cut, so as to maximize the vertical projection area of ​​the cavity base to be cut, and then processing wire cutting guide holes on the cavity base to be cut; S202, rotating the part base to be processed, so as to clamp and fix the part base to be processed when reaching the spatial angle C of the next cavity base to be cut, so as to maximize the vertical projection area of ​​the cavity base to be cut, and then processing wire cutting guide holes on the cavity base to be cut; S203, repeating step S202 until wire cutting guide holes corresponding one-to-one with the cavity bases to be cut are processed.

[0011] Further, step S3 specifically includes the following steps: S301, clamping the part base to be processed on the wire EDM lathe according to the spatial angles A and C corresponding to one of the cavity bases to be removed, so as to maximize the vertical projection area of ​​the cavity base to be removed, and then removing the cavity base to be removed by wire EDM through the wire EDM guide hole; S302, rotating the part base to be processed, so as to clamp and fix the part base to be processed when reaching the spatial angle C of the next cavity base to be removed, so as to maximize the vertical projection area of ​​the cavity base to be removed, and then removing the cavity base to be removed by wire EDM through the wire EDM guide hole; S303, repeating step S302 until all the cavity bases to be removed are removed, and obtaining a semi-finished part.

[0012] Further, step S4 specifically includes the following steps: S401, clamping the semi-finished part on a milling lathe according to the spatial angles A and C corresponding to the cavity base to be removed, and then precision milling the blade shape and cleaning the root at the intake end; S402, flanging the semi-finished part, and then precision milling the blade shape and cleaning the root at the exhaust end to obtain the finished part.

[0013] According to another aspect of the present invention, a clamping fixture for an integral closed stationary blade ring blade type is also provided, which is used to clamp the workpiece base to be processed in the above-described machining method of integral closed stationary blade ring blade type.

[0014] As a further improvement to the above technical solution:

[0015] Furthermore, the clamping fixture includes a support base for supporting the substrate of the part to be processed and arranging the mounting edge of the substrate of the part to be processed at a spatial angle A with the horizontal direction; a positioning element arranged on the positioning base for axial and radial positioning of the substrate of the part to be processed; positioning holes opened on the positioning element for corresponding to the angular holes on the substrate of the part to be processed; and positioning pins passing through the positioning holes for angular positioning of the substrate of the part to be processed. Multiple positioning holes are arranged at intervals along the circumference of the positioning element, and the positioning holes are arranged one-to-one with the cavity substrate to be cut off.

[0016] The present invention has the following beneficial effects:

[0017] The processing method for the integral closed stationary blade ring blade of the present invention, after obtaining the workpiece substrate, firstly determines the spatial angles A and C at which the vertical projection area of ​​each cavity substrate to be removed on the workpiece substrate is maximized. Then, based on spatial angles A and C, the workpiece substrate is clamped and fixed on a drilling device to machine wire cutting guide holes on each cavity substrate to be removed. Next, based on spatial angles A and C, the workpiece substrate is clamped and fixed on a wire cutting lathe, and a molybdenum wire is guided through the wire cutting guide holes to remove each cavity substrate by wire cutting. The cavity substrate is removed to obtain a semi-finished part. Finally, the semi-finished part is finished to obtain the part cost. During the machining of the part substrate, the vertical projection area of ​​each cavity substrate to be removed is maximized by using spatial angles A and C, so that the flow channel of the cavity substrate to be removed is always in a vertical state. A large diameter milling cutter can be used for vertical machining, resulting in less tool wear. The machining allowance of the cavity substrate to be removed is maximized, greatly reducing the number of machining steps. Compared with the existing technology, it reduces the machining cost, improves the machining efficiency, is highly practical, and is suitable for widespread promotion and application.

[0018] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0020] Figure 1 This is a flowchart of the processing method for the integral closed stationary blade ring blade type according to a preferred embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the workpiece substrate in the processing method of the integral closed stationary blade ring blade type according to a preferred embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the workpiece substrate in the processing method of the integral closed stationary blade ring blade type according to a preferred embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the workpiece substrate in the processing method of the integral closed stationary blade ring blade type according to a preferred embodiment of the present invention. Detailed Implementation

[0024] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0025] Figure 1 This is a flowchart of the processing method for the integral closed stationary blade ring blade type according to a preferred embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the workpiece substrate in the processing method of the integral closed stationary blade ring blade type according to a preferred embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the workpiece substrate in the processing method of the integral closed stationary blade ring blade type according to a preferred embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the workpiece substrate in the processing method of the integral closed stationary blade ring blade type according to a preferred embodiment of the present invention.

[0026] like Figures 1-4As shown, the processing method of the integral closed stationary blade ring blade type in this embodiment includes a part base to be processed, which includes angular holes for angular orientation and multiple cavity bases to be removed arranged circumferentially. The method includes the following steps: S1, obtaining the part base to be processed, and determining the spatial angle A and spatial angle C when the vertical projection area of ​​each cavity base to be removed on the part base to be processed is maximized, wherein spatial angle A is the inclination angle between the mounting edge of the part and the horizontal direction, and spatial angle C is the circumferential angle between the cavity base to be removed and the angular hole on the part to be processed; S2, according to the cavity base to be removed The corresponding spatial angles A and C are used to clamp the workpiece substrate on the drilling device to maximize the vertical projection area of ​​the cavity substrate to be removed, and then wire cutting guide holes are machined on the cavity substrate to be removed; S3, the workpiece substrate is clamped on the wire cutting lathe according to the spatial angles A and C corresponding to the cavity substrate to be removed to maximize the vertical projection area of ​​the cavity substrate to be removed, and then the cavity substrate to be removed is removed by wire cutting through the wire cutting guide holes to obtain a semi-finished part; S4, the semi-finished part is finished to obtain a finished part. Specifically, the processing method for the integral closed stationary blade ring blade of the present invention, after obtaining the substrate of the part to be processed, firstly determines the spatial angle A and spatial angle C when the vertical projection area of ​​each cavity substrate to be removed on the substrate of the part to be processed is maximized. Then, according to the spatial angle A and spatial angle C, the substrate of the part to be processed is clamped and fixed on the drilling device to process wire cutting guide holes on each cavity substrate to be removed. Then, according to the spatial angle A and spatial angle C, the substrate of the part to be processed is clamped and fixed on the wire cutting lathe, and the molybdenum wire is guided through the wire cutting guide holes to remove each cavity substrate by wire cutting. The process involves selecting a cavity substrate to be removed to obtain a semi-finished part. This semi-finished part is then finished to determine the final part cost. During the machining of the cavity substrate, spatial angles A and C are used to maximize the vertical projected area of ​​each cavity substrate to be removed. This ensures the flow channel of the cavity substrate is always in a vertical position, allowing for vertical machining with a large-diameter milling cutter. This results in less tool wear and maximizes the removal of machining allowance, significantly reducing machining steps. Compared to existing technologies, this reduces machining costs, increases efficiency, and is highly practical, suitable for widespread promotion and application. It should be understood that in an integral closed stationary blade ring, when the vertical projected area of ​​the cavity substrate to be removed is maximized, the flow channel surface of the cavity substrate is parallel to the vertical direction. In other words, by maximizing the vertical projected area of ​​the cavity substrate to be removed, the flow channel surface is made parallel to the vertical direction, facilitating the maximization of machining allowance removal during wire EDM. It should be understood that the spatial angle A corresponding to each cavity matrix to be removed is the same, and all the spatial angles C corresponding to all the cavity matrices to be removed are distributed in an arithmetic sequence.It should be understood that in wire EDM lathes, the cutting angle is limited. In this embodiment, spatial angles A and C are used to keep the flow channel of the cavity substrate to be removed vertical, thus eliminating the need for oblique cutting. It should be understood that the vertical projected area of ​​the cavity substrate to be removed refers to the area of ​​the upper end face of the cavity substrate that can pass through the cavity vertically and project onto the horizontal plane. Optionally, the drilling device is a high-speed drilling machine, and the drilling method is electrical discharge machining (EDM). It should be understood that the specific structure of the high-speed drilling machine is well-known to those skilled in the art and will not be elaborated upon here.

[0027] like Figures 2-4 As shown, in this embodiment, the steps of determining the spatial angles A and C when the vertical projection area of ​​the cavity substrate to be cut on the substrate of the part to be processed is maximized specifically include the following steps: multiple circular holes tangent to two adjacent blades are set on the surface of the cavity substrate to be cut; then, according to the preset angles α and r, the substrate of the part to be processed is rotated 90°-α around the horizontal plane; then, multiple circular holes are projected every time the preset angle is increased or decreased between (90°-α)±r, until the vertical projection area of ​​the multiple circular holes is maximized; the inclination angle between the mounting edge of the part and the horizontal direction is the spatial angle A, and the circumferential angle between the cavity substrate to be cut and the angular hole is the spatial angle C. Wherein, α is the inclination angle between the blade root near the outer ring in the substrate of the part to be processed and the horizontal direction, and r is the inclination angle between the blade root near the inner ring and the blade root near the outer ring in the substrate of the part to be processed. Specifically, by setting multiple circular holes to facilitate the calculation of the projected area and ensure the accuracy of the results, the substrate of the part to be processed is first rotated 90°-α around the horizontal plane. Since α is the inclination angle between the root of the blade near the outer ring and the horizontal direction, the root of the blade near the outer ring is parallel to the vertical direction. Since r is the inclination angle between the root of the blade near the inner ring and the root of the blade near the outer ring, multiple circular holes are projected onto the substrate of the part to be processed around the horizontal plane at preset angles between (90°-α)±r. When the vertical projected area of ​​the multiple circular holes is the largest, it is the maximum vertical projected area of ​​the cavity substrate to be cut, thus determining the spatial angles A and C. Optionally, the preset angle is 1° for easy adjustment and calculation.

[0028] In this embodiment, the diameter of the wire EDM wire threading guide hole is between Φ0.3mm and Φ3mm. Specifically, when the diameter of the wire EDM wire threading guide hole is between Φ0.3mm and Φ3mm, the diameter is appropriate and wire threading and cutting can be performed, while also falling within the processing diameter range of the drilling device; when the diameter of the wire EDM wire threading guide hole is less than Φ0.3mm, the diameter is too small, making it inconvenient or even impossible to thread the molybdenum wire; when the diameter of the wire EDM wire threading guide hole is greater than Φ3mm, the diameter is too large and falls outside the processing diameter range of the drilling device.

[0029] In this embodiment, the diameter of the wire EDM wire threading guide hole is Φ3mm. Specifically, when the diameter of the wire EDM wire threading guide hole is Φ3mm, the diameter is at its maximum within a suitable range, which facilitates the threading of the molybdenum wire, improves the cavity cutting speed, and since the drilling device usually uses electrical discharge machining, as the hole diameter increases, the electrode of the machining hole also increases, the contact area during electrical discharge machining increases, the electrode is less prone to wear, and the processing efficiency is high.

[0030] In this embodiment, the distance between the wire EDM wire guide hole and the nearest blade is L, and the value of L is between 1mm and 2mm. Specifically, when the value of L is between 1mm and 2mm, the length of the wire EDM tool path can be shortened, improving the wire EDM efficiency, while also leaving sufficient machining allowance for subsequent finishing. When the value of L is less than 1mm, the machining allowance for subsequent finishing is low, greatly increasing the machining difficulty. When the value of L is greater than 2mm, the wire EDM tool path is lengthened, reducing the machining efficiency.

[0031] In this embodiment, step S2 specifically includes the following steps: S201, clamping the part base to be processed on the drilling device according to the spatial angles A and C corresponding to one of the cavity bases to be cut, so as to maximize the vertical projection area of ​​the cavity base to be cut, and then processing wire cutting guide holes on the cavity base to be cut; S202, rotating the part base to be processed, so as to clamp and fix the part base to be processed when reaching the spatial angle C of the next cavity base to be cut, so as to maximize the vertical projection area of ​​the cavity base to be cut, and then processing wire cutting guide holes on the cavity base to be cut; S203, repeating step S202 until wire cutting guide holes corresponding one-to-one with the cavity bases to be cut are processed. Specifically, firstly, in step S201, a wire EDM guide hole is machined on one cavity substrate to be removed. Then, in step S202, a wire EDM guide hole is machined on the next cavity substrate to be removed. Finally, step S202 is repeated to machine the corresponding wire EDM guide hole on all cavity substrates to be removed, preparing for subsequent wire EDM machining. It should be understood that since the spatial angle A of each cavity substrate to be removed is the same, only the spatial angle C is different, therefore, by simply rotating the workpiece substrate, the angle C can be changed, and the corresponding wire EDM guide hole can be machined sequentially on each cavity substrate to be removed.

[0032] In this embodiment, step S3 specifically includes the following steps: S301, clamping the part base to be processed on the wire EDM lathe according to the spatial angles A and C corresponding to one of the cavity bases to be removed, so as to maximize the vertical projection area of ​​the cavity base to be removed, and then removing the cavity base to be removed by wire EDM through the wire EDM wire guide hole; S302, rotating the part base to be processed, so as to clamp and fix the part base to be processed when reaching the spatial angle C of the next cavity base to be removed, so as to maximize the vertical projection area of ​​the cavity base to be removed, and then removing the cavity base to be removed by wire EDM through the wire EDM wire guide hole; S303, repeating step S302 until all the cavity bases to be removed are removed, and obtaining a semi-finished part. Specifically, firstly, step S301 removes one cavity substrate to be removed; then, step S302 removes the next cavity substrate to be removed; finally, step S302 is repeated to remove all the cavity substrates to be removed, obtaining a semi-finished part, ensuring that the machining allowance of all cavities to be processed is removed to the maximum extent. It should be understood that since the spatial angle A of each cavity substrate to be removed is the same, only the spatial angle C differs, therefore, simply rotating the part substrate to be processed can change the angle C, allowing each cavity substrate to be removed to be removed sequentially.

[0033] In this embodiment, step S4 specifically includes the following steps: S401, clamping the semi-finished part on a milling lathe according to the spatial angles A and C corresponding to the cavity base to be cut, and then precision milling the blade shape and cleaning the root at the intake end; S402, flanging the semi-finished part, and then precision milling the blade shape and cleaning the root at the exhaust end to obtain the finished part.

[0034] The clamping fixture of the integral closed stationary blade ring type in this embodiment is used to clamp the workpiece base to be processed in the machining method of the integral closed stationary blade ring type in any of the above embodiments. Specifically, based on spatial angles A and C, the workpiece to be processed is clamped and fixed by the clamping fixture, so as to maximize the removal of the machining allowance of the cavity to be cut off, and facilitate the machining of large-diameter milling cutters, thereby reducing costs and improving efficiency.

[0035] In this embodiment, the clamping fixture includes a support base for supporting the substrate of the part to be processed and arranging the mounting edge of the substrate of the part to be processed at a spatial angle A with the horizontal direction; a positioning element arranged on the positioning base for axial and radial positioning of the substrate of the part to be processed; positioning holes opened on the positioning element for corresponding to the angular holes on the substrate of the part to be processed; and positioning pins passing through the positioning holes for angular positioning of the substrate of the part to be processed. Multiple positioning holes are arranged at intervals along the circumference of the positioning element, and the positioning holes are arranged one-to-one with the cavity substrate to be cut off. Specifically, the workpiece base is supported by a support base, with the support end face of the support base inclined at a spatial angle A to the horizontal direction, so that the mounting edge of the workpiece is also inclined at a spatial angle A to the horizontal direction. Then, a positioning element is installed on the support end face of the support base to position the workpiece base axially and radially. At this time, the workpiece base can still rotate circumferentially until it reaches the corresponding spatial angle C. Then, the positioning pin is inserted into the positioning hole and the angular hole to perform angular positioning, thereby clamping and fixing the workpiece base. The positioning holes are arranged one-to-one with the cavity base to be cut, ensuring that each cavity base to be cut can be fixed at the corresponding spatial angle C through the positioning hole, thus ensuring processing accuracy and improving processing efficiency.

[0036] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for machining an integral closed stationary blade ring type, wherein the workpiece substrate includes angular holes for fixed angle direction and a plurality of cavity substrates to be removed arranged at intervals along the circumferential direction, characterized in that, Includes the following steps: S1, obtain the substrate of the part to be processed, and determine the spatial angle A and spatial angle C when the vertical projection area of ​​each cavity substrate to be cut off on the substrate of the part to be processed is maximized. Wherein, spatial angle A is the inclination angle between the mounting edge of the part and the horizontal direction, and spatial angle C is the circumferential angle between the cavity substrate to be cut off on the part to be processed and the corner hole. S2, according to the spatial angles A and C corresponding to the cavity substrate to be cut, clamp the workpiece substrate to be processed on the drilling device so as to maximize the vertical projection area of ​​the cavity substrate to be cut, and then process the wire cutting guide hole on the cavity substrate to be cut. S3. The part to be processed is clamped on the wire EDM lathe according to the spatial angles A and C corresponding to the cavity base to be removed, so as to maximize the vertical projection area of ​​the cavity base to be removed. Then, the cavity base to be removed is removed by wire EDM through the wire EDM wire guide hole to obtain the semi-finished part. S4, perform finishing on the semi-finished part to obtain the finished part; Determining the spatial angles A and C at which the vertical projected area of ​​the cavity substrate to be removed on the substrate of the part to be processed is maximized includes the following steps: Multiple circular holes tangent to two adjacent blades are set on the surface of the cavity substrate to be cut. Then, according to the preset angles α and r, the substrate of the part to be processed is rotated 90°-α around the horizontal plane. Then, multiple circular holes are projected every time the preset angle is increased or decreased between (90°-α)±r, until the vertical projection area of ​​the multiple circular holes is the largest. The inclination angle between the mounting edge of the part and the horizontal direction is the spatial angle A, and the circumferential angle between the cavity substrate to be cut and the angular hole is the spatial angle C. Wherein, α is the inclination angle between the blade root near the outer ring in the substrate of the part to be processed and the horizontal direction, and r is the inclination angle between the blade root near the inner ring and the blade root near the outer ring in the substrate of the part to be processed. Step S2 specifically includes the following steps: S201, according to the spatial angles A and C corresponding to one of the cavity bases to be cut, clamp the part base to be processed on the drilling device so as to maximize the vertical projection area of ​​the cavity base to be cut, and then process a wire cutting guide hole on the cavity base to be cut. S202, rotate the workpiece base to be processed, and clamp and fix the workpiece base to be processed when it reaches the spatial angle C of the next cavity base to be cut, so as to maximize the vertical projection area of ​​the cavity base to be cut, and then process the wire cutting guide hole on the cavity base to be cut. S203, repeat step S202 until wire cutting guide holes are machined that correspond one-to-one with the cavity substrate to be cut.

2. The processing method of the integral closed stationary blade ring type according to claim 1, characterized in that, The diameter of the wire cutting guide hole is between Φ0.3mm and Φ3mm.

3. The processing method for the integral closed stationary blade ring type according to claim 2, characterized in that, The diameter of the wire cutting guide hole is Φ3mm.

4. The processing method of the integral closed stationary blade ring type according to claim 1, characterized in that, The distance between the wire cutting guide hole and the nearest blade is L, and the value of L is between 1mm and 2mm.

5. The processing method of the integral closed stationary blade ring type according to any one of claims 1-4, characterized in that, Step S3 specifically includes the following steps: S301, according to the spatial angles A and C corresponding to one of the cavity bases to be removed, the part base to be processed is clamped on the wire EDM lathe so as to maximize the vertical projection area of ​​the cavity base to be removed, and then the cavity base to be removed is removed by wire EDM through the wire EDM wire guide hole. S302, rotate the workpiece base to be processed, and clamp and fix the workpiece base to be processed when it reaches the spatial angle C of the next cavity base to be cut, so as to maximize the vertical projection area of ​​the cavity base to be cut, and then cut the cavity base to be cut off by wire cutting through the wire cutting guide hole. S303, repeat step S302 until all the cavity substrates to be removed are cut off to obtain a semi-finished part.

6. The processing method of the integral closed stationary blade ring type according to any one of claims 1-4, characterized in that, Step S4 specifically includes the following steps: S401, according to the spatial angles A and C corresponding to the cavity base to be removed, the semi-finished part is clamped on the milling lathe, and then the blade shape and root are finely milled at the intake end; S402 involves flanging the semi-finished part, followed by precision milling of the blade shape and root cleaning at the exhaust end to obtain the finished part.

7. A clamping fixture of the integral closed stationary blade annular type, characterized in that, The machining method for the integral closed stationary blade ring blade type according to any one of claims 1-6 is used to clamp the base of the part to be machined.

8. The clamping fixture of the integral closed stationary blade ring type according to claim 7, characterized in that, The clamping fixture includes a support base for supporting the substrate of the part to be processed and arranging the mounting edge of the substrate of the part to be processed at a spatial angle A with the horizontal direction; a positioning element arranged on the positioning base for axial and radial positioning of the substrate of the part to be processed; positioning holes opened on the positioning element for corresponding to the angular holes on the substrate of the part to be processed; and positioning pins passing through the positioning holes for angular positioning of the substrate of the part to be processed. Multiple positioning holes are arranged at intervals along the circumference of the positioning element, and the positioning holes are arranged one-to-one with the cavity substrate to be cut.

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