Aerospace complex thin-walled disc part spoke precision machining forming method

Abstract

The application discloses an aviation complex thin-wall disc piece spoke precision machining forming method, which comprises a collar groove rough machining forming, a spoke precision machining forming and a collar groove precision machining forming. On one hand, the application adopts an efficient machining route, and effectively controls the deformation of the part in the machining process. On the other hand, the application sets reasonable machining process parameters, and significantly improves the machining quality and machining efficiency of the part. In addition, the application also plans a reasonable machining allowance, effectively controls the axial deformation of the part in the machining process, and significantly improves the assembly datum of the thin-wall disc piece spoke after machining and the original design technical conditions.

Description

Technical Field

[0001] This invention belongs to the field of aero-engine processing technology, specifically relating to a method for precision machining and forming of spokes of complex thin-walled aero-engine discs. Background Technology

[0002] Complex thin-walled disks are key components of aero-engines and have wide applications. For example... Figure 1 The high-pressure compressor disc shown is designed for harsh operating environments, typically operating at high temperatures, high pressures, and high speeds. Furthermore, the disc's cross-sectional shape is extremely complex. The end face of the front spokes includes a retaining ring area with a retaining ring on its upper surface. Two symmetrical protrusions about the groove flank the groove, transitioning smoothly to the front web end face. Rectangular and semi-circular retaining ring grooves are respectively located on the radial inner and outer end faces of the retaining ring. The front and rear cross-sectional profiles of the disc are asymmetrical. Ventilation holes and assembly holes are distributed circumferentially. The maximum diameter of the disc is typically Φ400–1000 mm, the maximum wall thickness is typically 20–100 mm, and the thinnest area wall thickness is typically 2–10 mm. The disc is highly susceptible to deformation during machining.

[0003] Currently, the manufacturing of complex thin-walled discs for aerospace applications primarily involves forging discs to obtain forgings that meet specific requirements, followed by machining to gradually achieve the disc's complex surface profile. However, given the complex machining surfaces of the discs, extensive cutting can cause surface deformation, compromising assembly datum and original design specifications. Furthermore, the thinness of the disc's spokes during machining can lead to bending deformation in the spoke areas, resulting in axial dimensional deviations and, in severe cases, forcing the part to be scrapped.

[0004] In summary, in order to solve the problem of precision machining and forming of spokes of complex thin-walled discs for aerospace applications, it is urgent to develop a precision machining and forming method for spokes of complex thin-walled discs for aerospace applications to achieve high-performance, high-quality and high-efficiency machining of such discs. Summary of the Invention

[0005] This invention aims to provide a method for precision machining of spokes of complex thin-walled discs for aerospace applications, enabling high-performance and high-quality precision machining of such discs. This method can effectively control the machining deformation of complex thin-walled discs, maintain good assembly datum and original design technical conditions, and effectively control the axial dimensions of the discs during machining, thereby significantly improving the manufacturing qualification rate and quality of the discs.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A method for precision machining and forming of spokes of complex thin-walled disc components for aerospace applications includes the following steps: S1, rough machining of the retaining ring groove: S11, use V-shaped inserts to rough machine the outer circle of the disc, the retaining ring area, and the end face area between the outer circle of the disc and the retaining ring area, retaining radial and axial allowances; S12, use a V-shaped insert to rough turn the outer circle and end face of the retaining ring area. Then, use a grooving cutter to rough turn the rectangular section retaining ring groove to obtain the rectangular section feature. Then, use a ball end mill to rough turn the semi-circular section retaining ring groove to obtain the semi-circular section feature. S13, using a milling cutter to mill the upper end face and outer circle of the retaining ring area to obtain mutually symmetrical retaining ring structure features on the retaining ring area; S2, the spokes are precision machined and shaped: S21, finish turning the front spokes of the disc. The finish turning is divided into two parts. The first part uses a V-shaped insert to finish turning the front spoke area of ​​the disc, retaining the axial and radial allowances. The second part continues to use a V-shaped insert to finish turning the front spoke area of ​​the disc, removing the axial and radial allowances from the first part. S22, finish turning the rear spokes of the disc. The finish turning is divided into two parts. The first part uses a V-shaped insert to finish turning the rear spoke area of ​​the disc, retaining the axial and radial allowances. The second part continues to use a V-shaped insert to finish turning the rear spoke area of ​​the disc, removing the axial and radial allowances from the first part. S3, the retaining ring groove is precision machined and formed: S31, using a V-shaped blade to precision machine the upper end face of the rear spoke of the disc to obtain the final dimensions of the rear spoke of the disc; S32, using a V-shaped insert to precision machine the upper end face of the retaining ring area and the end face area between the outer circle of the disc and the retaining ring area, respectively obtain the final dimensions of the end face of the retaining ring area and the final thickness of the end face area between the outer circle of the disc and the retaining ring area. Then, using a grooving cutter to precision machine the axial end face of the rectangular cross-section retaining ring groove, obtain the final dimensions of the retaining ring groove.

[0007] As an option: In S11, the tip radius of the V-shaped blade is 0.4 mm; In S12, the V-shaped blade has a tip radius of 0.4 mm, the grooving blade has a tip radius of 0.3 mm and a blade width of 1.4 mm, and the ball end mill has a tip radius of 0.75 mm. In S13, the diameter of the milling cutter is 12mm.

[0008] As an option: In S12, when roughing the end face and outer circle of the retaining ring area, the turning speed is 25 r / min; In step S12, when rough machining the end face and outer circle of the retaining ring area, the cutting thickness is 0.3 to 0.5 mm. In S12, the maximum cutting thickness during rough machining of the rectangular cross-section retaining ring groove is 0.3 mm; In S12, the maximum cutting thickness during rough machining of the semi-circular cross-section retaining ring groove is 0.1 mm.

[0009] As an option: In S13, the upper surface of the retaining ring area is milled in two steps. After the first milling, an axial allowance is left, and the second milling is performed to the final size.

[0010] As an option: In S21 and S22, the turning speed is 15-17 r / min; In S21 and S22, the turning thickness is 0.1 to 0.3 mm; In S21 and S22, the turning tool infeed and retraction adopt circular arc infeed and retraction.

[0011] As an option: In S21, the V-shaped blade used in the first and second applications both have a blade tip radius of 0.4 mm; In S22, the V-shaped blades used in the first and second operations both have a tip radius of 0.4 mm.

[0012] As an alternative: in S31 and S32, the V-shaped blade has a tip radius of 0.4 mm, the grooving blade has a tip radius of 0.3 mm, and the blade width is 1.4 mm.

[0013] As an alternative: in S31 and S32, the spindle speed is controlled at 15 to 17 r / min during turning.

[0014] As an alternative: In S31 and S32, when precision machining the upper end face of the rear spoke of the disc, the upper end face of the retaining ring area, the end face area between the outer circle of the disc and the retaining ring area, and the axial end face of the rectangular cross-section retaining ring groove, the excess material of all machined surfaces is removed in one machining operation.

[0015] Compared with the prior art, the processing method of the present invention has the following characteristics: (1) By carrying out reasonable processing route design, an efficient processing sequence for complex thin-walled aerospace discs was obtained (rough machining of the clasp groove → precision machining of the spokes → fine machining of the clasp groove, each step is further divided into multiple sub-steps), which ensures that the deformation of complex thin-walled aerospace discs is effectively controlled during the processing.

[0016] (2) By setting reasonable machining process parameters (including tool selection, turning spindle speed, turning thickness, etc.), the machining quality and efficiency of complex thin-walled aerospace discs are significantly improved, greatly increasing the pass rate of machining complex thin-walled aerospace discs.

[0017] (3) By planning reasonable machining allowances (including radial allowances and axial allowances), the axial deformation of complex thin-walled discs in aerospace is effectively controlled during the machining process, and the assembly datum and original design technical conditions of the thin-walled discs after the spokes are machined are significantly improved. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a complex thin-walled disk component for aerospace applications in this invention; Figure 2 This is a schematic diagram of the rough machining of the retaining ring groove for complex thin-walled disk parts in aerospace applications in this invention; Figure 3 This is a schematic diagram of the milling of a swivel ring for a complex thin-walled disk in aerospace applications according to the present invention; Figure 4 This is a schematic diagram of the cross-section CC of the milled circlip for complex thin-walled disc components in aerospace applications in this invention; Figure 5 This is a schematic diagram of the precision-machined front spoke plate of a complex thin-walled disc component for aerospace applications in this invention; Figure 6 This is a schematic diagram of the precision-machined rear spoke plate of a complex thin-walled disc component for aerospace applications in this invention; Figure 7 This is a schematic diagram of the upper end face of the precision-machined rear spoke plate of the complex thin-walled disc component for aerospace applications in this invention; Figure 8 This is a partially enlarged schematic diagram of the upper surface of the rear spoke plate of the precision-machined complex thin-walled disc component in the present invention; Figure 9 This is a schematic diagram of the upper end face of the front spoke retaining ring of the precision-machined complex thin-walled disc in the present invention, the end face area between the outer circle of the disc and the retaining ring area, and the axial end face of the retaining ring groove with rectangular cross section; Figure 10 This is a partially enlarged schematic diagram of the upper end face of the front spoke retainer ring, the end face area between the outer circle of the disc and the retainer ring area, and the axial end face of the rectangular cross-section retainer ring groove in the precision machining of the complex thin-walled disc part of aviation in this invention. Detailed Implementation

[0019] The present invention will be further described below with reference to specific embodiments, but it should not be construed as limiting the scope of the subject matter of the present invention to the following embodiments. All modifications, substitutions and alterations made based on ordinary technical knowledge and common practices in the art without departing from the above-described technical concept of the present invention are included within the scope of the present invention.

[0020] like Figures 2 to 10 The image shows a method for precision machining and forming of spokes of complex thin-walled disc parts for aerospace applications, as disclosed in this invention, which includes the following: 1. Rough machining of the retaining ring groove: First, such as Figure 1The retaining groove of the front spoke includes rectangular cross-section retaining grooves and semi-circular cross-section retaining grooves. The machining process is carried out in three steps. The first step is to use a V-shaped insert to process the outer circle of the disc (i.e., the circumferential outer circle surface corresponding to the maximum outer diameter of the disc) and the retaining area (i.e., a protrusion on the end face where the front web of the disc is located, corresponding to...). Figure 3 The raised end face on the left side of the midsection NN), the end face area between the outer circle and the retaining ring area (corresponding to) Figure 2 The first step involves rough machining the end face of the retaining ring area (between the outer circle and the retaining ring area) on the thickened line, retaining an axial allowance Δt = 0.1~0.3mm and a radial allowance Δh = 0.05~0.25mm (here, axial refers to the direction of the central axis of the disc, and radial refers to the direction of the diameter of the disc). The second step uses a V-shaped insert to machine the end face and outer circle of the retaining ring area on the same side as the front spoke of the disc, removing the remaining allowance from the first step (at this point, the thickness of the retaining ring area is greater than that of the other retaining ring areas). A grooving cutter is used to machine the rectangular cross-section retaining ring groove at the retaining ring area, removing the remaining allowance from the first step. A ball end mill is used to machine the semi-circular cross-section retaining ring groove at the retaining ring area, removing the remaining allowance from the first step. The third step uses a milling cutter to mill the upper end face and outer circle of the retaining ring area, removing the remaining allowance from the second step, ultimately obtaining a symmetrical retaining ring shape after rough machining.

[0021] In the above scheme, when machining the end face and outer circle of the circlip area, the machining speed n is 25 r / min to prevent the spokes from deforming.

[0022] In the above scheme, when machining the end face and outer circle of the swivel ring area, the cutting thickness Δa is 0.3 to 0.5 mm; when machining the rectangular cross-section swivel ring groove, the maximum cutting thickness Δa is 0.3 mm; when machining the semi-circular cross-section swivel ring groove, the maximum cutting thickness Δa is 0.1 mm.

[0023] In the above scheme, when milling the upper surface and outer circle of the retaining ring area, a milling cutter with a diameter of Φ=12mm should be used to prevent milling deformation of the retaining ring.

[0024] In the above scheme, in order to prevent the formation of vibration marks on the end face of the disc during the milling process, the milling is carried out in two stages. During the first milling, the milling cutter is raised by Δz in the Z-axis direction (i.e., a allowance of Δz is reserved as the cutting amount for the second milling). Δz is generally taken as 0.1 to 0.3 mm. After the first milling is completed, the measurement is taken, and then the second milling is performed to complete the cutting and obtain the final size.

[0025] 2. Precision machining and forming of spokes: The thin-walled spokes of the disc are machined using a turning process, which is divided into two steps. The end face of the disc containing the retaining ring area is designated as the front end, and the other end as the rear end. The first step involves turning the front spokes of the disc. During this step, the turning allowance is divided into two machining operations. The first operation uses a V-shaped insert to finish-turn the front spoke area, retaining an axial allowance Δt = 0.1–0.2 mm and a radial allowance Δh = 0.05–0.2 mm. The second operation also uses a V-shaped insert to finish-turn the front spoke area, removing the allowance left from the first operation.

[0026] Similarly, in the second step, when turning the rear spokes of the disc, the turning allowance is divided into two machining operations. The first machining operation uses a V-shaped insert to finish turn the rear spoke area of ​​the disc, retaining an axial allowance Δt = 0.1~0.2mm and a radial allowance Δh = 0.05~0.2mm. The second machining operation also uses a V-shaped insert to finish turn the rear spoke area of ​​the disc, removing the allowance reserved in the first operation.

[0027] In the above scheme, when turning the thin-walled spokes (including the front spokes and the rear spokes) of the disc part, in order to prevent axial deformation of the thin-walled spokes, the turning speed n is 15 to 17 r / min.

[0028] In the above scheme, when turning the thin-walled spokes (including the front spokes and the rear spokes) of the disc part, in order to prevent work hardening and deformation of the spokes, the turning thickness Δa is 0.1 to 0.3 mm.

[0029] In the above scheme, when turning the thin-walled spokes (including the front spokes and the rear spokes) of the disc part, in order to prevent tool marks from appearing on the spokes, the turning infeed and retraction are carried out by circular arc infeed and retraction.

[0030] 3. Precision machining of the retaining ring groove: The precision machining of the retaining ring groove on the thin-walled front spokes of a disc mainly involves turning the retaining ring groove on the front spokes and turning the upper end face of the rear spokes. First, the upper end face of the rear spokes is machined using a V-shaped insert to obtain the final dimensions of the rear spokes. Next, the upper end face of the retaining ring area is machined using another V-shaped insert to obtain the end face dimensions of the retaining ring area. The end face of the upper region of the front spokes (the end face between the outer circle of the disc and the retaining ring area) is also machined to obtain the thickness of the end face at the corresponding outer circle of the disc. Finally, the rectangular cross-section retaining ring groove is machined using a grooving tool. Furthermore, during the finish turning of the rectangular cross-section retaining ring groove, only the axial dimension of the rectangular cross-section retaining ring groove is machined to obtain the final geometric dimensions of the retaining ring groove on the thin-walled disc spokes.

[0031] In the above scheme, when machining the upper end face of the rear spoke of the disc and the retaining ring area at the front spoke of the disc, the turning spindle speed n should be controlled between 15 and 17 r / min in order to prevent axial deformation of the part and the appearance of vibration marks.

[0032] In the above scheme, when machining the upper end face of the rear spoke of the disc and the retaining ring area at the front spoke of the disc, all the excess material on the machined surfaces is removed in one machining operation.

[0033] The following is based on Figure 1 Taking the complex thin-walled high-pressure compressor disk shown in the figure as an example, this invention further illustrates a method for precision machining and forming of the spokes of a complex thin-walled disk component.

[0034] The target part size of the complex thin-walled high-pressure compressor disk for aerospace is: d f =121.2mm, D f1 =399.6mm, D f2 =405.6mm, D f3 =417.6mm, D f4 =424.8mm, D f5 =428.4mm, D f6 =432mm,D f7 =452.4mm, t=3mm, t1=3.9mm, t2=2.04mm. The forming method includes the following steps: Step 1: Rough machining of the retaining ring groove: The first step involves using a V-shaped insert with a tip radius R=0.4mm to rough machine the outer circle of the disc, the retaining ring area, and the end face area between the retaining ring area and the outer circle of the disc, retaining an axial allowance Δt=0.25mm and a radial allowance Δh=0.2mm. The second step involves using a V-shaped insert with a tip radius R=0.4mm to rough machine the end face and outer circle of the retaining ring area on the front spoke side of the disc, removing the remaining allowance from the first step. A grooving cutter with a tip radius R=0.3mm and a cutter width of 1.4mm is then used to machine the rectangular cross-section retaining ring groove on the retaining ring, removing the remaining allowance from the first step. Finally, a ball end mill with a tip radius R=0.75mm is used to machine the semi-circular cross-section retaining ring groove on the retaining ring, removing the remaining allowance from the first step. Figure 2 As shown. The third step, as... Figure 3 , Figure 4 As shown, the remaining material after the second turning step (including the upper end face and outer circle) of the retaining ring area is milled with a milling cutter, and finally the mutually symmetrical retaining ring shape after rough machining is obtained. Figure 3 In the enlarged view of the G-axis, the retaining ring is symmetrical, including a groove as the center of symmetry and two protrusions symmetrically distributed about the groove. The two protrusions transition to the upper surface of the retaining ring area through a curved surface.

[0035] Furthermore, when turning the end face and outer diameter of the retaining ring area, the turning speed n is 25 r / min to prevent spoke deformation. The cutting thickness Δa is 0.3 mm when turning the end face and outer diameter of the retaining ring area; the maximum cutting thickness Δa is 0.3 mm when turning the rectangular cross-section retaining ring groove; and the maximum cutting thickness Δa is 0.1 mm when turning the semi-circular cross-section retaining ring groove. When milling the retaining ring, a 12 mm diameter milling cutter is used to prevent milling deformation. During the milling process, to prevent chatter marks on the end face of the disc, milling is performed twice. The milling cutter is raised Δz in the Z-axis direction (i.e., in the machining allowance direction) as the milling allowance for the second milling, where Δz is generally taken as 0.3 mm.

[0036] Step 2: Precision machining and shaping of the spokes: The thin-walled spokes of the disc are machined by turning, and the machining of the spokes is divided into two steps. The first step is to turn the front spokes of the disc, such as... Figure 5 As shown; when turning the front spokes, the turning allowance is divided into two machining operations. The first machining operation uses a V-shaped insert with a tool tip radius R=0.4mm to finish turn the front spoke area of ​​the disc, retaining an axial allowance Δt=0.2mm and a radial allowance Δh=0.15mm. Figure 5 (Medium gray shaded area); The second time, using a V-shaped blade with a tip radius R=0.4mm, the front spoke area of ​​the disc is precision machined to remove the allowance left in the first operation.

[0037] Similarly, in the second step, when turning the rear spokes of the disc part, as... Figure 6 As shown, the turning allowance is divided into two machining operations. The first machining operation uses a V-shaped insert with a tool tip radius R = 0.4 mm to finish-turn the rear spoke area of ​​the disc, retaining an axial allowance Δt = 0.2 mm and a radial allowance Δh = 0.15 mm. Figure 6 (In the black shaded area); the second time, a V-shaped blade with a blade tip radius R=0.4mm is used to finish the spoke area of ​​the disc, removing the allowance left in the first operation.

[0038] Furthermore, when turning the thin-walled spokes (including the front and rear spokes) of a disc part, the turning speed n is 17 r / min to prevent axial deformation of the spokes. When turning the thin-walled spokes (including the front and rear spokes) of a disc part, the turning thickness Δa is 0.2 mm to prevent work hardening and deformation of the spokes. When turning the thin-walled spokes (including the front and rear spokes) of a disc part, circular infeed and retraction are used to prevent tool marks on the spokes.

[0039] Step 3: Precision machining of the retaining ring groove: The precision machining of the retaining groove of the thin-walled spokes of the disc mainly includes turning the retaining groove of the front spoke of the disc (such as...). Figure 9 (as shown) and the upper end face of the rear spoke of the turned disc (as shown) Figure 7 (As shown). First, machine the upper end face of the rear spoke of the disc, as shown. Figure 8 As shown, a V-shaped insert with a tip radius R = 0.4 mm is used to finish the upper end face of the rear spoke of the disc. After removing the radial allowance Δh, the final dimensions of the rear spoke are obtained. Next, a V-shaped insert with a tip radius R = 0.4 mm is used to finish the upper end face of the retaining ring area of ​​the disc to obtain the end face dimensions of the retaining ring area, as shown. Figure 10 As shown; the end face of the upper region of the front spoke of the disc (the end face between the outer circle of the disc and the retaining ring area) is precision machined again to obtain the thickness of the end face corresponding to the outer circle of the disc. Finally, using a grooving cutter with a tip radius R=0.3mm and a cutter width of 1.4mm, the rectangular cross-section retaining ring groove on the retaining ring is precision machined, as shown. Figure 9 As shown. Furthermore, when machining the rectangular cross-section retaining ring groove, only the axial dimension of the rectangular cross-section retaining ring groove is machined (as shown). Figure 10 The Δt allowance along the central axis is used to obtain the final geometric dimensions of the thin-walled spoke retainer groove, such as... Figure 10 As shown.

[0040] Furthermore, when machining the upper end face of the rear spoke of the disc and the retaining ring area at the front spoke of the disc, the spindle speed n should be controlled between 17 r / min to prevent axial deformation and chatter marks. During machining of the upper end face of the rear spoke of the disc and the retaining ring area at the front spoke of the disc, all machining allowances on the machined surfaces are removed in a single pass.

[0041] Contents not described in detail in this specification are prior art known to those skilled in the art. Although illustrative specific embodiments of the invention have been described above to facilitate understanding by those skilled in the art, it should be understood that the invention is not limited to the scope of the specific embodiments. Various modifications are readily apparent to those skilled in the art as long as they fall within the spirit and scope of the invention as defined and determined by the appended claims, and all inventions utilizing the concept of this invention are protected.

Claims

1. A method for precision machining and forming of an aviation complex thin-walled disc piece web, characterized in that, Includes the following steps: S1, rough machining of the retaining ring groove: S11, use V-shaped inserts to rough machine the outer circle of the disc, the retaining ring area, and the end face area between the outer circle of the disc and the retaining ring area, retaining radial and axial allowances; S12, use a V-shaped insert to rough turn the outer circle and end face of the retaining ring area. Then, use a grooving cutter to rough turn the rectangular section retaining ring groove to obtain the rectangular section feature. Then, use a ball end mill to rough turn the semi-circular section retaining ring groove to obtain the semi-circular section feature. S13, using a milling cutter to mill the upper end face and outer circle of the retaining ring area to obtain mutually symmetrical retaining ring structure features on the retaining ring area; S2, precision-machined spokes: S21, finish turning the front spokes of the disc. The finish turning is divided into two parts. The first part uses a V-shaped insert to finish turning the front spoke area of ​​the disc, retaining the axial and radial allowances. The second part continues to use a V-shaped insert to finish turning the front spoke area of ​​the disc, removing the axial and radial allowances from the first part. S22, finish turning the rear spokes of the disc. The finish turning is divided into two parts. The first part uses a V-shaped insert to finish turning the rear spoke area of ​​the disc, retaining the axial and radial allowances. The second part continues to use a V-shaped insert to finish turning the rear spoke area of ​​the disc, removing the axial and radial allowances from the first part. S3, the retaining ring groove is precision machined and formed: S31, using a V-shaped blade to precision machine the upper end face of the rear spoke of the disc to obtain the final dimensions of the rear spoke of the disc; S32, use a V-shaped insert to finish turn the upper end face of the retaining ring area and the end face area between the outer circle of the disc and the retaining ring area to obtain the final dimensions of the end face of the retaining ring area and the final thickness of the end face area between the outer circle of the disc and the retaining ring area. Then, use a grooving cutter to finish turn the axial end face of the rectangular cross-section retaining ring groove to obtain the final dimensions of the retaining ring groove. In S12, when roughing the end face and outer circle of the retaining ring area, the turning speed is 25 r / min; In step S12, when rough machining the end face and outer circle of the retaining ring area, the cutting thickness is 0.3 to 0.5 mm. In S12, the maximum cutting thickness during rough machining of the rectangular cross-section retaining ring groove is 0.3 mm; In S12, the maximum cutting thickness during rough machining of the semi-circular cross-section retaining ring groove is 0.1 mm; In S21 and S22, the turning speed is 15-17 r / min; In S21 and S22, the turning thickness is 0.1 to 0.3 mm; In S21 and S22, the turning tool infeed and retraction adopt circular arc infeed and retraction.

2. The method for precision machining and forming of spokes of complex thin-walled aerospace disks according to claim 1, characterized in that: In S11, the tip radius of the V-shaped blade is 0.4 mm; In S12, the V-shaped blade has a tip radius of 0.4 mm, the grooving blade has a tip radius of 0.3 mm and a blade width of 1.4 mm, and the ball end mill has a tip radius of 0.75 mm. In S13, the diameter of the milling cutter is 12mm.

3. The method for precision machining and forming of spokes of complex thin-walled aerospace disks according to claim 1, characterized in that: In S13, the upper surface of the retaining ring area is milled in two steps. After the first milling, an axial allowance is left, and the second milling is performed to the final size.

4. The method for precision machining and forming of spokes of complex thin-walled aerospace disks according to claim 1, characterized in that: In S21, the V-shaped blade used in the first and second applications both have a blade tip radius of 0.4 mm; In S22, the V-shaped blades used in the first and second operations both have a tip radius of 0.4 mm.

5. The method of claim 1, wherein the method is characterized by: In S31 and S32, the V-shaped blade has a tip radius of 0.4 mm, the grooving blade has a tip radius of 0.3 mm, and the blade width is 1.4 mm.

6. The method for precision machining and forming of spokes of complex thin-walled aerospace disks according to claim 1, characterized in that: In S31 and S32, the spindle speed is controlled at 15-17 r / min during turning.

7. The method for precision machining and forming of spokes of complex thin-walled aerospace disks according to claim 1, characterized in that: In S31 and S32, the excess material on all machined surfaces is removed in one operation when precision machining the upper end face of the rear spoke of the disc part, the upper end face of the retaining ring area, the end face area between the outer circle of the disc part and the retaining ring area, and the axial end face of the rectangular cross-section retaining ring groove.

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