A device and method for preventing deformation during finish machining of a thin-walled disk-like part with an inclined web

Abstract

A device and method for preventing deformation during the finish machining of a bevel web thin-walled disc-shaped part. The anti-deformation device includes a convex pressing cover, a concave pressing cover, a rubber ring, and a screw; the outer peripheral surfaces of the convex pressing cover and the concave pressing cover respectively have cylindrical sections, and the diameter φB of the cylindrical section is adapted to the diameter φA of the middle straight section of the inner hole of the bevel web thin-walled disc-shaped part; chamfered edges are respectively provided at the edges of the opposite surfaces of the convex pressing cover and the concave pressing cover, and the rubber ring is arranged in the area formed by the two chamfered edges; the screw passes through the screw through-hole in the center of the convex pressing cover and is connected to the threaded hole in the center of the concave pressing cover, so as to make the convex pressing cover and the concave pressing cover squeeze the rubber ring to closely adhere to the middle straight section of the inner hole of the bevel web thin-walled disc-shaped part. The deformation amount Y of the cross-section of the inner hole of the bevel web thin-walled disc-shaped part is restricted, and further the deformation of the web is restricted, so the rigidity of the bevel web thin-walled disc-shaped part in the finish machining state is enhanced, thus ensuring the product quality.

Description

Technical Field

[0001] The present invention relates to the technical field of aero-engine manufacturing, and particularly relates to a device and method for preventing deformation during finish machining of thin-wall disc parts with inclined web plates. Background Art

[0002] The parts to be processed by the present invention are thin-wall disc parts with inclined web plates, specifically as Figure 1 、 Figure 2 shown. In the finish machining process of thin-wall disc parts with inclined web plates in aero-engines, due to the small wall thickness H of the thin-wall disc parts with inclined web plates and the fact that the web plates of the parts are in a suspended state, and since the web plates of the parts are inclined planes and an effective auxiliary support cannot be created, when finish machining is carried out in this state, the thin-wall disc parts with inclined web plates are extremely likely to undergo uncontrollable deformation under the action of the cutting force F of the tool. The web plate deformation angle is X°, and the deformation amount of the inner hole cross-section is Y, resulting in out-of-tolerance of related dimensions and seriously affecting the product quality. The problem of deformation during finish machining of thin-wall disc parts with inclined web plates in aero-engines has always been a difficult problem in the machining industry. Solving this problem can fill the gap in the problem of deformation during finish machining of thin-wall disc parts with inclined web plates in the industry and ensure the product quality, which is of great significance to the entire aero-engine manufacturing industry. Summary of the Invention

[0003] The main object of the present invention is to propose a device and method for preventing deformation during finish machining of thin-wall disc parts with inclined web plates. By closely fitting the inner hole of the thin-wall disc parts with inclined web plates using this device, while enhancing the rigidity of the thin-wall disc parts with inclined web plates during the machining state, the thin-wall disc parts with inclined web plates are prevented from deforming through spatial geometric constraints, thereby achieving the purpose of preventing deformation of the thin-wall disc parts during finish machining.

[0004] To achieve the above object, on the one hand, the present invention provides a device for preventing deformation during finish machining of thin-wall disc parts with inclined web plates, including a convex pressing cover, a concave pressing cover, a rubber ring, and a screw; the outer peripheral surfaces of the convex pressing cover and the concave pressing cover respectively have cylindrical sections, and the diameter φB of the cylindrical section is adapted to the diameter φA of the middle straight section of the inner hole of the thin-wall disc parts with inclined web plates; chamfered edges are respectively provided at the edges of the opposite surfaces of the convex pressing cover and the concave pressing cover, and the rubber ring is arranged in the area formed by the two chamfered edges; the screw passes through the screw through-hole at the center of the convex pressing cover and is connected to the threaded hole at the center of the concave pressing cover, so as to make the convex pressing cover and the concave pressing cover squeeze the rubber ring to tightly adhere to the middle straight section of the inner hole of the thin-wall disc parts with inclined web plates.

[0005] Preferably, when the screw is tightened, the length L2 of the cylinder formed by the cylindrical sections of the convex pressing cover and the concave pressing cover together is greater than the length L1 of the middle straight section of the inner hole of the thin-wall disc parts with inclined web plates.

[0006] Preferably, the relationship between the length L2 of the cylinder formed jointly by the cylindrical sections of the male pressing cover and the female pressing cover and the length L1 of the middle straight section of the inner hole of the thin-walled disk part with inclined plane and web is: L2 ≥ L1 + 8 mm.

[0007] Preferably, the cylindrical sections of the male pressing cover and the female pressing cover have a clearance fit with an accuracy grade of F9 with the diameter φA of the middle straight section of the hole of the thin-walled disk part with inclined plane and web, and the roundness of the cylindrical sections of the male pressing cover and the female pressing cover is not greater than 0.03 mm.

[0008] Preferably, conical limiting sections are provided on the outer peripheral surfaces of the male pressing cover and the female pressing cover, and the taper of the conical limiting sections is the same as the taper at both ends of the inner hole of the thin-walled disk part with inclined plane and web. By providing the conical limiting sections, when the screw is not tightened, that is, when the rubber ring is not squeezed against the inner hole of the thin-walled disk part with inclined plane and web, the male pressing cover and the female pressing cover can be prevented from falling off from the inner hole of the thin-walled disk part with inclined plane and web.

[0009] Preferably, a guiding boss with an outer diameter of φD is provided on the surface of the male pressing cover, and a guiding hole with an inner diameter of φC is provided on the surface of the female pressing cover, and the guiding boss and the guiding hole are matched with each other.

[0010] Preferably, the roundness of the outer circle of the guiding boss and the roundness of the guiding hole are both not greater than 0.03 mm, and the outer diameter φD of the guiding boss and the inner diameter φC of the guiding hole have a clearance fit with an accuracy grade of F9.

[0011] Preferably, the thicknesses of the male pressing cover and the female pressing cover are both ≥ 10 mm. Thereby, the rigidity of the male pressing cover and the female pressing cover and the effectiveness of pressing are ensured.

[0012] Preferably, when the rubber ring is in use, the compression amount is 1 / 5 - 2 / 5 of the diameter φG of the rubber ring.

[0013] On the other hand, the present invention also provides a method for preventing deformation during the finish machining of a thin-walled disk part with inclined plane and web. Using the above anti-deformation device, it includes the following steps:

[0014] Step S1: Insert the female pressing cover into the inner hole of the thin-walled disk part with inclined plane and web from the back of the thin-walled disk part with inclined plane and web;

[0015] Step S2: Clamp the thin-walled disk part with inclined plane and web on the fixture and press it tightly;

[0016] Step S3: Place the rubber ring, and insert the male pressing cover into the inner hole of the thin-walled disk part with inclined plane and web from the front of the thin-walled disk part with inclined plane and web;

[0017] Step S4: Pass the screw through the screw through-hole at the center of the male pressing cover and connect it with the threaded hole at the center of the female pressing cover, and do not tighten it temporarily;

[0018] Step S5: Adjust the positions of the male pressing cover and the female pressing cover in the inner hole of the thin-walled disc part with inclined web, so that the cylinder formed by the cylindrical sections of the male pressing cover and the female pressing cover provides good support for the middle straight section of the inner hole of the thin-walled disc part with inclined web;

[0019] Step S6: Tighten the screw so that the male pressing cover and the female pressing cover squeeze the rubber ring to closely adhere to the middle straight section of the inner hole of the thin-walled disc part with inclined web;

[0020] Step S7: After machining other dimensions of the thin-walled disc part with inclined web in place, loosen the fixture, take out the thin-walled disc part with inclined web, loosen the screw, and remove the male pressing cover, the female pressing cover and the rubber ring to complete the deformation processing of the thin-walled disc part with inclined web.

[0021] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0022] (1) By adopting the anti-deformation device provided by the present invention, the outer circle of the cylindrical sections of the male pressing cover and the female pressing cover has a precise fit relationship with the middle straight section of the inner hole of the thin-walled disc part with inclined web. When using this anti-deformation device, by tightening the screw, it forces the male pressing cover and the female pressing cover to relatively contract the spacing, compresses the rubber ring to expand radially, and makes the rubber ring closely adhere to the inner wall of the middle straight section of the inner hole of the thin-walled disc part with inclined web, thereby fixing this anti-deformation device, achieving the effect of geometrically restricting the deformation of the thin-walled disc part with inclined web in space. Specifically, it restricts the deformation amount Y of the cross-section of the inner hole of the thin-walled disc part with inclined web, and further restricts the deformation of the web. Therefore, the rigidity of the thin-walled disc part with inclined web in the finish machining state is enhanced, thus ensuring the product quality.

[0023] (2) In the present invention, when the screw is tightened, the length L2 of the cylinder formed by the cylindrical sections of the male pressing cover and the female pressing cover is greater than the length L1 of the middle straight section of the inner hole of the thin-walled disc part with inclined web. Specifically, L2≥L1 + 8mm. When in use, even if the axial positions of the male pressing cover and the female pressing cover change, the cylinder formed by the cylindrical sections of the male pressing cover and the female pressing cover still provides good support for the inner hole of the thin-walled disc part with inclined web, ensuring the stability of processing. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0025] Figure 1 It is a schematic diagram of the thin-walled disc part with inclined web to be processed by the present invention;

[0026] Figure 2 It is an analysis diagram of the machining stress deformation of the thin-walled disc parts with inclined web plates to be processed by the present invention;

[0027] Figure 3 It is a schematic structural diagram of the anti-deformation device provided by the present invention;

[0028] Figure 4 It is a schematic diagram when the anti-deformation device provided by the present invention is matched with the thin-walled disc parts with inclined web plates;

[0029] Figure 5 It is the main sectional view of the convex pressing cover in the present invention;

[0030] Figure 6 It is the left view of the convex pressing cover in the present invention;

[0031] Figure 7 It is the main sectional view of the concave pressing cover in the present invention;

[0032] Figure 8 It is the right view of the concave pressing cover in the present invention;

[0033] Figure 9 It is a schematic structural diagram of the rubber ring in the present invention;

[0034] Figure 10 It is a schematic structural diagram of the screw in the present invention;

[0035] Figure 11 It is a schematic diagram of the washer in the present invention.

[0036] Explanation of the reference numerals in the drawings: 1. Screw; 2. Convex pressing cover; 3. Rubber ring; 4. Concave pressing cover; 5. Washer. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0038] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0039] Combined with Figure 1 、 Figure 2As shown in the figure, it is a thin-walled disc part with an inclined web to be processed by the present invention. In the finishing process of the thin-walled disc part with an inclined web, since the wall thickness H of the thin-walled disc part with an inclined web is small and the web of the part is in a suspended state, and since the web of the part is an inclined surface, it is impossible to create an effective auxiliary support. In this state, when performing finishing machining, the thin-walled disc part with an inclined web is extremely likely to undergo uncontrollable deformation under the action of the cutting force F of the tool. The deformation angle of the web is X°, and the deformation amount of the inner hole cross-section is Y, resulting in out-of-tolerance of related dimensions and seriously affecting the quality of the product.

[0040] Combined with Figures 3 to 11 As shown in the figure, an anti-deformation device for finishing machining of a thin-walled disc part with an inclined web includes a convex pressing cover 2, a concave pressing cover 4, a rubber ring 3, and a screw 1; the outer peripheral surfaces of the convex pressing cover 2 and the concave pressing cover 4 respectively have cylindrical sections, and the diameter φB of the cylindrical section is adapted to the diameter φA of the middle straight section of the inner hole of the thin-walled disc part with an inclined web; chamfered edges are respectively provided at the edges of the opposite surfaces of the convex pressing cover 2 and the concave pressing cover 4, and the rubber ring 3 is arranged in the area formed by the two chamfered edges; the screw 1 passes through the screw through-hole in the center of the convex pressing cover 2 and is connected to the threaded hole in the center of the concave pressing cover 4 for pressing the convex pressing cover 2 and the concave pressing cover 4 to squeeze the rubber ring 3 against the middle straight section of the inner hole of the thin-walled disc part with an inclined web, and a washer 5 is arranged between the screw 1 and the convex pressing cover 2.

[0041] Combined with Figure 1 、 Figure 3 As shown in the figure, when the screw 1 is tightened, the length L2 of the cylinder formed by the cylindrical sections of the convex pressing cover 2 and the concave pressing cover 4 is greater than the length L1 of the middle straight section of the inner hole of the thin-walled disc part with an inclined web. Specifically, L2≥L1 + 8mm. The function of this structure is that even when the axial positions of the convex pressing cover 2 and the concave pressing cover 4 change, the cylinder formed by the cylindrical sections of the convex pressing cover 2 and the concave pressing cover 4 still provides good support for the inner hole of the thin-walled disc part with an inclined web, ensuring the stability of machining.

[0042] In this embodiment, the diameter φB of the cylindrical sections of the convex pressing cover 2 and the concave pressing cover 4 and the diameter φA of the middle straight section of the hole of the thin-walled disc part with an inclined web satisfy a clearance fit with an accuracy grade of F9, and the roundness of the cylindrical sections of the convex pressing cover 2 and the concave pressing cover 4 is not greater than 0.03mm.

[0043] Combined with Figure 3 As shown in the figure, tapered limiting sections are provided on the outer peripheral surfaces of the convex pressing cover 2 and the concave pressing cover 4, and the taper of the tapered limiting sections is the same as the taper at both ends of the inner hole of the thin-walled disc part with an inclined web. By providing the tapered limiting sections, when the screw 1 is not tightened, that is, when the rubber ring 3 is not squeezed against the inner hole of the thin-walled disc part with an inclined web, it can prevent the convex pressing cover 2 and the concave pressing cover 4 from falling off from the inner hole of the thin-walled disc part with an inclined web.

[0044] On the surface of the convex gland 2, there is a guiding boss with an outer diameter of φD, and on the surface of the concave gland 4, there is a guiding hole with an inner diameter of φC. The guiding boss and the guiding hole are matched with each other, which can further ensure the position accuracy of the docking of the convex gland 2 and the concave gland 4, and ensure the cylindricity of the cylinder formed by the cylindrical sections of the convex gland 2 and the concave gland 4. Further, the roundness of the outer circle of the guiding boss and the roundness of the guiding hole are both not greater than 0.03 mm, and the clearance fit with an accuracy grade of F9 is satisfied between the outer diameter φD of the guiding boss and the inner diameter φC of the guiding hole.

[0045] In this embodiment, the thicknesses of both the convex gland 2 and the concave gland 4 are ≥ 10 mm, thereby ensuring the rigidity of the convex gland 2 and the concave gland 4 and the effectiveness of pressing.

[0046] In this embodiment, when the rubber ring 3 is in use, the compression amount is 1 / 5 - 2 / 5 of the diameter φG of the rubber ring 3.

[0047] This embodiment also provides a method for preventing deformation in the finish machining of bevel web thin-walled disc parts. Using the above anti-deformation device, it includes the following steps:

[0048] Step S1: Insert the concave gland 4 into the inner hole of the bevel web thin-walled disc part from the back of the bevel web thin-walled disc part;

[0049] Step S2: Clamp the bevel web thin-walled disc part on the fixture and press it tightly;

[0050] Step S3: Place the rubber ring 3, and insert the convex gland 2 into the inner hole of the bevel web thin-walled disc part from the front of the bevel web thin-walled disc part;

[0051] Step S4: Pass the screw 1 through the screw through-hole at the center of the convex gland 2 and connect it with the threaded hole at the center of the concave gland 4, and do not tighten it temporarily;

[0052] Step S5: Adjust the positions of the convex gland 2 and the concave gland 4 in the inner hole of the bevel web thin-walled disc part, so that the cylinder formed by the cylindrical sections of the convex gland 2 and the concave gland 4 forms good support for the middle straight section of the inner hole of the bevel web thin-walled disc part;

[0053] Step S6: Tighten the screw 1 to make the convex gland 2 and the concave gland 4 squeeze the rubber ring 3 to be closely attached to the middle straight section of the inner hole of the bevel web thin-walled disc part;

[0054] Step S7: After machining other dimensions of the bevel web thin-walled disc part to the required values, loosen the fixture, take out the bevel web thin-walled disc part, loosen the screw 1, and remove the convex gland 2, the concave gland 4 and the rubber ring 3 to complete the deformation machining of the bevel web thin-walled disc part.

[0055] In summary, for the anti-deformation device for the finish machining of bevel web thin-walled disc parts provided by the present invention, the specific structures of its main components are as follows:

[0056] 1. Convex cover 2

[0057] The convex pressure cover 2 is a disc-shaped structure, in which the diameter φB of the cylindrical section on the convex pressure cover 2 and the middle straight section φA of the inner hole of the inclined spoke plate thin-walled disc-like parts meet the clearance fit relationship of accuracy grade F9, thereby ensuring the effectiveness of the geometric constraints on the inclined spoke plate thin-walled disc-like parts and the rigidity under processing.

[0058] A conical limiting section is provided on the outer peripheral surface of the convex pressure cover 2, and the taper of the conical limiting section is not greater than the taper of the two ends of the inner hole of the inclined spoke plate thin-walled disk-like parts to avoid interference. The main function of the conical limiting section is to limit the axial movement of the anti-deformation device during processing to ensure the stability of the processing.

[0059] The diameter φB of the cylindrical section on the convex pressure cover 2 ensures that the roundness is no greater than 0.03 mm, thereby ensuring that the convex pressure cover 2 will not shake during the processing of the inclined spoke plate thin-walled disk-like parts, avoiding affecting the processing stability.

[0060] A guide boss with an outer diameter of φD is provided on the surface of the convex pressure cover 2. The function of the guide boss is to quickly guide the assembly with the guide hole on the concave pressure cover 4 to ensure that the cylindrical sections of the convex pressure cover 2 and the concave pressure cover 4 are aligned after assembly. The outer diameter of the guide boss on the convex pressure cover 2 is φD, and the guide hole φC on the concave pressure cover 4 satisfies the clearance fit relationship of the accuracy grade F9, thereby ensuring the effectiveness of the geometric constraints on the inclined spoke plate thin-walled disk parts and the rigidity under processing.

[0061] The outer diameter φD of the guide boss at the center of the convex pressure cover 2 ensures that the roundness is no more than 0.03 mm, thereby ensuring that after the convex pressure cover 2 and the concave pressure cover 4 are matched, no shaking will occur during the processing of the inclined spoke plate thin-walled disk-like parts, avoiding affecting the processing stability.

[0062] The convex pressure cover 2 has a through hole at its center, through which the screw 1 can pass to press the convex pressure cover 2 and the concave pressure cover 4 .

[0063] The unfilled sharp edge chamfer of the convex pressure cover 2 is R0.3±0.2 to prevent workers from scratching their hands when using the convex pressure cover 2.

[0064] The thickness of the convex pressing cover 2 should be ≥10 mm, so as to ensure the rigidity of the convex pressing cover 2 and the effectiveness of pressing.

[0065] 2. Concave pressure cover 4

[0066] The concave pressure cover 4 is a disc-shaped structure, and the diameter φB of the cylindrical section on the concave pressure cover 4 and the inner hole φA of the inclined surface spoke plate thin-walled disc-like parts meet the clearance fit relationship of the accuracy grade F9, thereby ensuring the effectiveness of the geometric constraints on the inclined surface spoke plate thin-walled disc-like parts and the rigidity under processing.

[0067] A tapered limiting section is provided on the outer peripheral surface of the concave pressing cover 4. The taper of this tapered limiting section is not greater than the taper at both ends of the inner hole of the thin-walled disc part of the inclined surface spoke plate, so as to avoid interference. The main function of this tapered limiting section is to limit the axial movement of the anti-deformation device during processing and ensure the stability of processing.

[0068] The diameter φB of the cylindrical section on the concave pressing cover 4 ensures that the roundness is not greater than 0.03 mm, so as to ensure that the concave pressing cover 4 will not shake during the processing of the thin-walled disc part of the inclined surface spoke plate and avoid affecting the stability of processing.

[0069] A guiding hole with an inner diameter of φC is provided on the surface of the concave pressing cover 4. The guiding hole cooperates with the guiding boss on the convex pressing cover 2. Its function is to quickly guide the assembly of the convex pressing cover 2. The inner diameter φC of the guiding hole and the outer diameter φD of the guiding boss on the convex pressing cover 2 satisfy the clearance fit relationship with an accuracy grade of F9, so as to ensure the effectiveness of the geometric constraint on the thin-walled disc part of the inclined surface spoke plate and the rigidity under the processing state.

[0070] The inner diameter φC of the guiding hole on the concave pressing cover 4 ensures that the roundness is not greater than 0.03 mm, so as to ensure that after the convex pressing cover 2 and the concave pressing cover 4 are fitted, they will not shake during the processing of the thin-walled disc part of the inclined surface spoke plate and avoid affecting the stability of processing.

[0071] There is a through threaded hole in the center of the concave pressing cover 4. The screw 1 can pass through this threaded hole to squeeze the convex pressing cover 2 and the concave pressing cover 4.

[0072] The unmarked sharp edge chamfer of the concave pressing cover 4 is R0.3±0.2 to prevent the worker from being scratched when using the concave pressing cover 4.

[0073] The thickness of the concave pressing cover 4 should be ≥10 mm to ensure the rigidity of the concave pressing cover 4 and the effectiveness of pressing.

[0074] III. Rubber ring 3

[0075] The rubber ring 3 is of an annular structure. The inner diameter φK of the rubber ring 3 is smaller than the outer diameter φB of the cylindrical sections of the convex pressing cover 2 and the concave pressing cover 4, which is convenient for the worker to install quickly. At the same time, it ensures that the rubber ring 3 will not move arbitrarily under the processing state of the thin-walled disc part of the inclined surface spoke plate and guarantees the stability of the invention.

[0076] When the rubber ring 3 is in use, the compression amount is 1 / 5 to 2 / 5 of the diameter φG of the rubber ring 3, and the compression effect is the best.

[0077] IV. Screw 1 and washer 5

[0078] The screw 1 and the washer 5 can be selected as ordinary general parts. The outer diameter of the screw 1 is smaller than the inner diameter of the washer 5 to ensure that the screw 1 can pass through the washer 5 smoothly.

[0079] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A method for preventing deformation during the finish machining of a thin-walled disk-like part with an inclined web, characterized in that, An anti-deformation device is adopted. The anti-deformation device includes a convex pressing cover (2), a concave pressing cover (4), a rubber ring (3), and a screw (1). The outer peripheral surfaces of the convex pressing cover (2) and the concave pressing cover (4) respectively have cylindrical sections, and the diameter φB of the cylindrical section is adapted to the diameter φA of the middle straight section of the inner hole of the thin-wall disk part of the inclined plane spoke. Chamfered edges are respectively provided at the edges of the opposite surfaces of the convex pressing cover (2) and the concave pressing cover (4), and the rubber ring (3) is arranged in the area formed by the two chamfered edges. The screw (1) passes through the screw through-hole at the center of the convex pressing cover (2) and is connected to the threaded hole at the center of the concave pressing cover (4) to make the convex pressing cover (2) and the concave pressing cover (4) squeeze the rubber ring (3) against the middle straight section of the inner hole of the thin-wall disk part of the inclined plane spoke. The method includes the following steps: Step S1: Insert the concave pressing cover (4) into the inner hole of the thin-wall disk part of the inclined plane spoke from the back. Step S2: Clamp the thin-wall disk part of the inclined plane spoke on the fixture and press it tightly. Step S3: Place the rubber ring (3), and insert the convex pressing cover (2) into the inner hole of the thin-wall disk part of the inclined plane spoke from the front. Step S4: Connect the screw (1) through the screw through-hole at the center of the convex pressing cover (2) to the threaded hole at the center of the concave pressing cover (4), and do not tighten it temporarily. Step S5: Adjust the positions of the convex pressing cover (2) and the concave pressing cover (4) in the inner hole of the thin-wall disk part of the inclined plane spoke so that the cylinder formed by the cylindrical sections of the convex pressing cover (2) and the concave pressing cover (4) provides good support for the middle straight section of the inner hole of the thin-wall disk part of the inclined plane spoke. Step S6: Tighten the screw (1) to make the convex pressing cover (2) and the concave pressing cover (4) squeeze the rubber ring (3) against the middle straight section of the inner hole of the thin-wall disk part of the inclined plane spoke. Step S7: After machining other dimensions of the thin-wall disk part of the inclined plane spoke to be in place, loosen the fixture, take out the thin-wall disk part of the inclined plane spoke, loosen the screw (1), and remove the convex pressing cover (2), the concave pressing cover (4) and the rubber ring (3) to complete the deformation processing of the thin-wall disk part of the inclined plane spoke.

2. A method for preventing deformation during finish machining of a thin-walled disk-like part with an inclined web, as described in claim 1, wherein, When the screw (1) is tightened, the length L2 of the cylinder formed by the cylindrical sections of the convex pressing cover (2) and the concave pressing cover (4) is greater than the length L1 of the middle straight section of the inner hole of the thin-wall disk part of the inclined plane spoke.

3. A method for preventing deformation during finish machining of a thin-walled disk-like part with an inclined web, as described in claim 2, wherein The relationship between the length L2 of the cylinder formed by the cylindrical sections of the convex pressing cover (2) and the concave pressing cover (4) and the length L1 of the middle straight section of the inner hole of the thin-wall disk part of the inclined plane spoke is: L2≥L1 + 8mm.

4. A method for preventing deformation during finish machining of a thin-walled disk-like part with an inclined web, as described in claim 1, characterized in that, The diameter φB of the cylindrical sections of the convex pressing cover (2) and the concave pressing cover (4) and the diameter φA of the middle straight section of the hole of the thin-wall disk part of the inclined plane spoke satisfy a clearance fit with an accuracy grade of F9, and the roundness of the cylindrical sections of the convex pressing cover (2) and the concave pressing cover (4) is not greater than 0.03mm.

5. A method for preventing deformation during finish machining of a thin-walled disk-like part with an inclined web, as described in claim 1, characterized in that, Conical limiting sections are provided on the outer peripheral surfaces of the convex pressing cover (2) and the concave pressing cover (4), and the taper of the conical limiting sections is not greater than the taper at both ends of the inner hole of the thin-wall disk part of the inclined plane spoke.

6. The finish machining anti - deformation method for a thin - walled disk - like part with an inclined web as claimed in claim 1, wherein, A guiding boss with an outer diameter of φD is provided on the surface of the convex pressing cover (2), and a guiding hole with an inner diameter of φC is provided on the surface of the concave pressing cover (4), and the guiding boss and the guiding hole are matched with each other.

7. A method for preventing deformation during finish machining of a thin-walled disk-like part with an inclined web, as described in claim 6, characterized in that, The roundness of the outer circle of the guiding boss and the roundness of the guiding hole are both not greater than 0.03 mm, and a clearance fit with an accuracy grade of F9 is satisfied between the outer diameter φD of the guiding boss and the inner diameter φC of the guiding hole.

8. The finish machining anti-deformation method for an inclined-plane web thin-wall disc part as described in claim 1, characterized in that The thicknesses of the convex pressing cover (2) and the concave pressing cover (4) are both ≥ 10 mm.

9. A method for preventing deformation during finish machining of a thin-walled disk-like part with an inclined web, as described in claim 1, wherein, When the rubber ring (3) is in use, the compression amount is 1 / 5 to 2 / 5 of the diameter φG of the rubber ring (3).

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