Damping ring, dismounting and mounting tool and production process

Abstract

The invention provides a damping ring, a dismounting and mounting tool and a production process, and relates to the technical field of aero-engines. The damping ring comprises a ring body, the ring body is provided with a circumferential opening, a first tool hole and a second tool hole are formed in the two sides of the circumferential opening respectively, and the first tool hole and the second tool hole extend in the radial direction of the ring body and are formed in the inner circumferential face of the ring body. During dismounting and mounting, the dismounting and mounting tool is connected with the first tool hole and the second tool hole, and clamping force enabling the first tool hole and the second tool hole to be close to each other is applied to the ring body, so that the ring body deforms, and dismounting and mounting of the spiral bevel gear are facilitated. Due to the fact that the first tool hole and the second tool hole extend in the radial direction of the ring body, when the first tool hole and the second tool hole are machined, the position accuracy of the first tool hole and the position accuracy of the second tool hole can be guaranteed only by guaranteeing that the ring body is centered, and therefore the possibility that rotation is unbalanced is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of aero-engines, and in particular to a damping ring, a disassembly and assembly tool, and a production process. Background Art

[0002] Due to the advantages of large overlap coefficient, strong load-bearing capacity and smooth movement, the bevel gears are widely used in the transmission system of aircraft engines. The bevel gears in aircraft engines have high rotation speeds, which often cause overall gear vibration. In recent years, domestic and foreign aircraft engines have experienced gear fatigue fractures due to excessive vibration, and even large pieces of gears broke and flew out. In order to achieve the purpose of weight reduction, designers often use a thin plate and narrow rim structure. The bevel gears will produce periodic dynamic loads under the excitation of transmission errors, and under certain conditions, the traveling wave resonance of the thin plate and narrow rim will be aroused. This makes it impossible to avoid the resonant speed range of the bevel gears only through structural frequency modulation and dynamic stress calculation. It is necessary to find a more effective way to avoid the resonance of the bevel gears. Installing a damping ring can reduce the vibration and noise generated by the bevel gears during operation, which is currently internationally recognized as an effective strategy for vibration reduction of aircraft engine bevel gears.

[0003] At present, the damping rings of the spiral bevel gears of aircraft engines mostly use the principle of thermal expansion and contraction. The bevel gear is heated and the damping ring is pre-cooled and installed in the groove of the bevel gear rim. A stamping machine is required for stamping. The installation is complicated and the replacement is difficult, and destructive disassembly is often required. The disassembly and assembly process is complicated. In order to improve this problem, the invention patent with application number CN201911234982.X proposes a damping ring with an opening, and the symmetrical part of the opening is milled. However, the invention research found that the damping ring is prone to imbalance during the rotation of the spiral bevel gear, and the damping effect needs to be further improved. Summary of the invention

[0004] The purpose of the present invention is to provide a damping ring, a disassembly and assembly tool, and a production process, which can improve the problem of rotational imbalance existing in the prior art.

[0005] The embodiments of the present invention can be implemented in the following ways:

[0006] A damping ring, the damping ring is used to be installed on a spiral bevel gear, and the spiral bevel gear has a damping ring groove for installing the damping ring;

[0007] The damping ring includes a ring body having a circumferential opening and a first tooling hole and a second tooling hole are respectively arranged on both sides of the circumferential opening. The first tooling hole and the second tooling hole extend in the radial direction of the ring body and are arranged on the inner circumferential surface of the ring body.

[0008] Optionally, a center line of the circumferential opening is arranged to be inclined relative to a radial direction of the ring body.

[0009] Optionally, the ring body has a radial line, and the angle between the center line of the circumferential opening and the radial line is α, 48°≤α≤52°; the angle between the extension direction of the first tooling hole and the radial line is β, 13°≤β≤17°; the angle between the extension direction of the second tooling hole and the radial line is γ, 58°≤γ≤62°;

[0010] One end of the circumferential opening away from the center of the ring body extends toward a direction close to the first tooling hole.

[0011] Optionally, the first tooling hole and the second tooling hole penetrate the ring body in a radial direction of the ring body.

[0012] Optionally, the damping ring further has a silver-plated layer wrapped around the surface of the ring body; the thickness of the silver-plated layer is d, 0.02mm≤d≤0.05mm.

[0013] Optionally, the cross-section of the ring body is square, and the corners of the square are smoothly transitioned by rounding.

[0014] A damping ring disassembly and assembly tool is used for disassembling and assembling the above-mentioned damping ring and spiral bevel gear. The damping ring disassembly and assembly tool comprises at least two tooling pins, and the tooling pins have mutually connected pin rods and clamping heads; the pin rod of one tooling pin is used to connect with the first tooling hole, and the pin rod of the other tooling pin is used to connect with the second tooling hole.

[0015] A damping ring production process, the damping ring production process is used to produce the above-mentioned damping ring; the damping ring production process comprises:

[0016] A wire drawing machine is used to draw the raw material to obtain wire material;

[0017] Winding the wire material, and shearing it after winding to obtain an annular blank;

[0018] heat treating the annular blank;

[0019] Processing the heat-treated annular blank to form the circumferential opening;

[0020] The annular blank is placed in the bottom of the punching tool, and after being flattened, a first tool hole and a second tool hole are formed on both sides of the circumferential opening to obtain the annular body.

[0021] Optionally, the step of heat treating the annular blank comprises:

[0022] Adjust the tempering furnace temperature to within the range of 305℃~315℃;

[0023] After the temperature in the tempering furnace is stable for at least 20 minutes, the annular blank is placed in the tempering furnace for tempering, and the holding time is 80 minutes to 90 minutes;

[0024] After the tempering is completed, the annular blank is taken out and cooled naturally.

[0025] Optionally, after obtaining the ring body, the damping ring production process further comprises:

[0026] polishing the ring body;

[0027] The polished ring body is subjected to surface treatment to form a silver-plated layer on the surface of the ring body.

[0028] The beneficial effects of the damping ring, disassembly and assembly tooling, and production process provided by the embodiments of the present invention include:

[0029] An embodiment of the present invention provides a damping ring, which is used to be installed in a damping ring groove of a spiral bevel gear. The damping ring includes a ring body, the ring body has a circumferential opening, and the first tooling hole and the second tooling hole are respectively arranged on both sides of the circumferential opening. The first tooling hole and the second tooling hole extend radially along the ring body and are arranged on the inner circumferential surface of the ring body. During disassembly and assembly, the disassembly and assembly tool is connected with the first tooling hole and the second tooling hole, and a clamping force is applied to the ring body to bring the first tooling hole and the second tooling hole closer together, so that the ring body is deformed, which facilitates disassembly and assembly with the spiral bevel gear. Since the first tooling hole and the second tooling hole extend radially along the ring body, when processing the first tooling hole and the second tooling hole, it is only necessary to ensure that the ring body is centered to ensure the position accuracy of the first tooling hole and the second tooling hole, thereby reducing the possibility of rotational imbalance.

[0030] The embodiment of the present invention further provides a damping ring disassembly and assembly tool, which is used for disassembling and assembling the damping ring and the spiral bevel gear.

[0031] An embodiment of the present invention further provides a damping ring production process, which is used to produce the above-mentioned damping ring. The damping ring production process adopts molding and winding molding processes for processing, avoiding cutting, low internal stress and small warping deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above features and advantages of the present invention can be better understood after reading the detailed description of the embodiments of the present disclosure in conjunction with the following drawings. In the drawings, the components are not necessarily drawn to scale, and components with similar related properties or features may have the same or similar reference numerals.

[0033] Figure 1 It shows a schematic diagram of the overall structure of a damping ring provided according to one aspect of the present invention when it is installed on a spiral bevel gear;

[0034] Figure 2 A schematic cross-sectional structure diagram of a damping ring provided according to one aspect of the present invention when installed on a spiral bevel gear is shown;

[0035] Figure 3 A schematic structural diagram of a damping ring provided according to one aspect of the present invention at a first viewing angle is shown;

[0036] Figure 4 A schematic structural diagram of a damping ring provided according to one aspect of the present invention at a second viewing angle is shown;

[0037] Figure 5 A schematic cross-sectional structure diagram of a damping ring provided according to another aspect of the present invention when installed on a spiral bevel gear is shown;

[0038] Figure 6 A schematic diagram of the cross-sectional structure of a ring body provided according to one aspect of the present invention is shown;

[0039] Figure 7 A schematic cross-sectional structure diagram of a spiral bevel gear provided according to one aspect of the present invention is shown;

[0040] Figure 8 A schematic structural diagram of a tool pin in a damping ring disassembly and assembly tool provided according to one aspect of the present invention is shown;

[0041] Fig. 9 A schematic diagram of disassembling and assembling a damping ring according to one aspect of the present invention is shown;

[0042] Fig.10 A diagram showing the steps of a damping ring production process provided according to one aspect of the present invention.

[0043] Reference numerals:

[0044] 100-damping ring; 110-ring body; 111-circumferential opening; 112-first tooling hole; 113-second tooling hole; 114-inner circumferential surface; 200-arctic bevel gear; 211-gear portion; 212-large head end; 213-small head end; 214-damping ring groove; 300-tooling pin; 311-pin rod; 312-clamping head; 313-clamping opening. DETAILED DESCRIPTION

[0045] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. Note that the aspects described below in conjunction with the accompanying drawings and specific embodiments are only exemplary and should not be construed as limiting the scope of protection of the present invention in any way.

[0046] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", "vertical" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of the invention is usually placed when used, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0047] At the same time, it should be noted that the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0048] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified or limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, an integral connection, or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or the internal communication of two components, etc. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] Figure 1 This is a schematic diagram of the overall structure of the damping ring 100 provided in this embodiment when it is installed on the spiral bevel gear 200. Figure 2 Schematic diagram of the cross-sectional structure of the damping ring 100 provided in this embodiment when installed on the spiral bevel gear 200, Figure 3 This is a schematic structural diagram of the damping ring 100 provided in this embodiment at a first viewing angle, Figure 4 This is a schematic diagram of the structure of the damping ring 100 provided in this embodiment at a second viewing angle. Figure 1-Figure 4 The present embodiment provides a damping ring 100, which is used to be installed on the damping ring groove 214 of the spiral bevel gear 200. After installation, the damping ring 100 is coaxially arranged with the spiral bevel gear 200. The gear portion 211 of the spiral bevel gear 200 has a conical cross section, so the gear portion 211 has a large head end 212 and a small head end 213 opposite to each other, as shown in FIG. Figure 1 and Figure 2 As shown, the damping ring groove 214 is arranged at the small head end 213 of the gear portion 211, and accordingly, the damping ring 100 is also located at the small head end 213 of the gear portion 211. It can be understood that in other embodiments, the damping ring 100 can also be arranged at the large head end 212 of the gear portion 211 (such as Figure 5 shown).

[0050] Please continue to refer to Figure 1-Figure 4In this embodiment, the damping ring 100 includes a ring body 110, the ring body 110 has a circumferential opening 111, and the first tooling hole 112 and the second tooling hole 113 are respectively arranged on both sides of the circumferential opening 111. The circumferential opening 111 arranged on the ring body 110 makes the ring body 110 present a structure that is not closed in the circumferential direction. The first tooling hole 112 and the second tooling hole 113 extend along the radial direction of the ring body 110 and are arranged on the inner circumferential surface 114 of the ring body 110. When the damping ring 100 is installed on the spiral bevel gear 200, the first tooling hole 112 and the second tooling hole 113 on the inner circumferential surface 114 of the ring body 110 are exposed to the outside, which is convenient for disassembly and assembly of the damping ring 100. Since the first tooling hole 112 and the second tooling hole 113 extend radially along the ring body 110, when processing the first tooling hole 112 and the second tooling hole 113, it is only necessary to ensure that the ring body 110 is centered to ensure the position accuracy of the first tooling hole 112 and the second tooling hole 113. Compared with setting the first tooling hole 112 and the second tooling hole 113 on the circumferential surface of the axial side of the ring body 110, the position accuracy of the first tooling hole 112 and the second tooling hole 113 is higher, thereby reducing the possibility of rotational imbalance.

[0051] The center line of the circumferential opening 111 is inclined relative to the radial direction of the ring body 110. In the description of this embodiment, "the radial direction of the ring body 110" refers to the direction extending from the center O of the ring body 110 to the body of the ring body 110, and this direction is perpendicular to the center line of the ring body 110. The center line of the circumferential opening 111 is the first center line L1 (such as Figure 4 Compared with a straight opening (i.e., an opening extending radially along the ring body 110), under the condition of the same opening distance, the inclined opening (i.e., the circumferential opening 111 in this embodiment) removes more material, which is beneficial to reducing the weight of the damping ring 100 and has a better damping effect, and will not be disengaged from the helical bevel gear due to the high-speed rotation and vibration of the helical bevel gear.

[0052] Further, the ring body 110 has a radial line L4, which is a straight line passing through the center of the ring body 110 and extending radially. The angle between the first center line and the radial line is α, 48°≤α≤52°. The angle between the extension direction of the first tooling hole 112 and the radial line is β, 13°≤β≤17°. Specifically, the center line of the first tooling hole 112 is the second center line L2 (such as Figure 4 As shown in FIG. 1 , the extension direction of the first tool hole 112 can be regarded as the direction of the second center line. The angle between the extension direction of the second tool hole 113 and the radial line is γ, 58°≤γ≤62°. Specifically, the center line of the second tool hole 113 is the third center line L3 (as shown in FIG. Figure 4As shown in FIG. 1 , the extension direction of the second tooling hole 113 can be regarded as the direction of the third center line. At the same time, the end of the circumferential opening 111 away from the center of the ring body 110 extends toward the direction close to the first tooling hole 112. In other words, the intersection of the first center line and the second center line is located on the side of the first tooling hole 112 away from the center of the ring body 110.

[0053] Optionally, α can be set to 48°, 50° or 52°; β can be set to 13°, 15° or 17°; and γ can be set to 58°, 60° or 62°.

[0054] Further, the width dimension of the circumferential opening 111 is Δ, 2.75 mm ≤ Δ ≤ 3.25 mm. Optionally, Δ can be set to 2.75 mm, 3 mm or 3.25 mm. Further, the apertures of the first tooling hole 112 and the second tooling hole 113 are r, 1.4 mm ≤ r ≤ 4.6 mm, and optionally, r can be set to 1.4 mm, 1.5 mm or 1.6 mm.

[0055] In this embodiment, the damping ring 100 also has a silver-plated layer wrapped around the surface of the ring body 110. By providing a silver-plated layer, the damping ring 100 can play a self-lubricating role during operation, thereby helping to extend the service life of the damping ring 100 and enhance the vibration reduction effect. Optionally, the thickness of the silver-plated layer is d, 0.02mm≤d≤0.05mm, and specifically, d can be set to 0.02mm, 0.03mm, 0.04mm or 0.05mm.

[0056] In this embodiment, the first tooling hole 112 and the second tooling hole 113 are through holes, which penetrate the ring body 110 in the radial direction of the ring body 110. By setting the first tooling hole 112 and the second tooling hole 113 as through holes, it is helpful to facilitate the discharge of gas in the first tooling hole 112 and the second tooling hole 113 when the ring body 110 is subjected to surface treatment to form a silver-plated layer, thereby ensuring the silver-plated effect.

[0057] Figure 6 This is a schematic diagram of the cross-sectional structure of the ring body 110 provided in this embodiment. Figure 7 The cross-sectional structure diagram of the spiral bevel gear 200 provided in this embodiment is shown. Figure 1-Figure 7 The cross section of the ring body 110 is square, and the corners of the square are smoothly rounded. The thickness D of the ring body 110 can be set according to the contact pressure, and the size of the fillet M is set to be less than or equal to 1 mm, and it does not interfere with the bottom of the damping ring groove 214. The fillet M is larger than the rounded R of the damping ring groove 214. At the same time, the diameter of the ring body 110 in the free state can be set according to the size of the damping ring groove 214. The diameter of the ring body 110 in the free state is N, N = SD + 2 × SH + 1.4,

[0058] Wherein, SD is the shoulder diameter of the damping ring groove 214 , and SH is the shoulder height of the damping ring groove 214 .

[0059] In this embodiment, the outer diameter N of the ring body 110 in the free state is 101.4 mm to 101.94 mm, the distance s between the first center line and the center of the ring body 110 is 38.1 mm, the thickness D of the ring body 110 is 3.6 mm, the size of the chamfer M is 0.9 mm, and the width K of the ring body 110 is 3.6 mm.

[0060] It should be noted that the dimensions of the ring body 110 mentioned in this embodiment are the dimensions of the ring body 110 before the damping ring 100 is silver-plated.

[0061] Figure 8 The structure diagram of the tool pin 300 in the damping ring 100 disassembly tool provided in this embodiment is as follows: Fig. 9 FIG. 1 shows a schematic diagram of disassembling and assembling the damping ring 100 provided in this embodiment. Figure 8 and Fig. 9 As shown, the embodiment of the present invention further provides a damping ring 100 disassembly tool, which is used to disassemble and assemble the damping ring 100 and the spiral bevel gear 200. The damping ring 100 disassembly tool includes at least two tool pins 300, and the tool pins 300 have mutually connected pin rods 311 and clamping heads 312, and the clamping heads 312 have clamping openings 313, which are convenient for clamping the clamping openings 313 of the two tool pins 300 by tool clamps (not shown) or similar tools, so as to shrink the damping ring 100 and realize the disassembly and assembly of the damping ring 100. Correspondingly, the damping ring 100 disassembly tool can also include tool clamps, which can be electrician pliers, etc., and have a tip structure for clamping the clamping opening 313.

[0062] Specifically, when disassembling and assembling the damping ring 100, grease or glue should be applied to the pin rod 311 to ensure a tight fit between the tooling pin 300 and the first tooling hole 112 and the second tooling hole 113. The diameter of the pin rod 311 is set according to the actual diameters of the first tooling hole 112 and the second tooling hole 113. For example, multiple groups of tooling pins 300 with different pin rods 311 diameters can be set to match the actual diameters of the first tooling hole 112 and the second tooling hole 113.

[0063] Furthermore, the maximum outer diameter of the tooling pin 300 should theoretically be no greater than the width K of the damping ring 100. In this case, the first tooling hole 112 and the second tooling hole 113 can be designed to be centered in the axial direction of the damping ring 100, thereby avoiding interference between the tooling pin 300 and the spiral bevel gear 200 when disassembling the damping ring 100. It is understandable that if it can be ensured that the disassembly and assembly are not affected, the maximum outer diameter of the tooling pin 300 can also be set to be greater than the width of the damping ring 100, and the first tooling hole 112 and the second tooling hole can be designed to be non-centered in the circumferential direction.

[0064] Fig. 9 This is a step diagram of the damping ring 100 production process provided in this embodiment. Figure 1-Figure 9 This embodiment also provides a damping ring 100 production process to produce the above-mentioned damping ring 100. The damping ring 100 production process includes:

[0065] S01: A wire drawing machine is used to draw the raw material to obtain wire material.

[0066] The raw material can be steel wire, the surface of which should be smooth and clean, without defects such as folds, scales, cracks, pitting, scratches, etc. that are harmful to use. Its material grades include but are not limited to AISI302 (material technical standard is AMS5688), 04Cr18Ni9Ti (material technical standard is Q / OAPD 2552-2014), etc. The raw material is preferably rectangular wire, and round wire can also be used. After drawing by a wire drawing machine, a rectangular wire with rounded sides is formed. When drawing, a stainless steel special wire drawing die corresponding to the required cross-sectional size should be used.

[0067] S02: Winding the wire material, and shearing it after winding to obtain a ring-shaped blank.

[0068] Put the wire material vertically into the mandrel, fix the wire material on the winding mold with a wire, and wind it to form a spiral shape. After winding, cut it with scissors to obtain a ring blank. The obtained ring blank should be flat and free of defects such as warping.

[0069] S03: heat treating the ring blank.

[0070] The temperature of the tempering furnace is adjusted to the range of 305℃~315℃. After the temperature in the tempering furnace reaches the above range and stabilizes for at least 20 minutes, the ring blank is placed in the tempering furnace for tempering and heat preservation for 80min~90min. After the tempering is completed, the ring blank is taken out of the tempering furnace and cooled naturally, and the heat treatment is completed.

[0071] S04: Processing the heat-treated annular blank to form a circumferential opening 111 .

[0072] The position of the circumferential opening 111 is determined, and then the end of the annular blank is punched out by a punching cutter. After punching, the protruding burrs of the cut are removed by a file.

[0073] S05: placing the annular blank into the bottom of the punching tool, and after flattening, opening a first tool hole 112 and a second tool hole 113 on both sides of the circumferential opening 111 to obtain the ring body 110 .

[0074] The annular blank is placed in the bottom of the punching tool and flattened. After the positions of the first tool hole 112 and the second tool hole 113 are determined, a Φ1.5 mm drill bit is used to perform the punching operation of the first tool hole 112 and the second tool hole 113 at the same time.

[0075] After executing step S05, the damping ring 100 production process may further include:

[0076] S06: Polishing the ring body 110 .

[0077] Put the ring body 110, polishing auxiliary materials and water into the polishing machine. Specifically, the volume ratio of the ring body 110, brightener and high-frequency abrasive is 1:2:10, and then add water to cover the ring body 110, and then polishing can be performed. After polishing, wash it with hot water and wipe it dry with a clean cotton cloth.

[0078] S07 : performing surface treatment on the polished ring body 110 to form a silver-plated layer on the surface of the ring body 110 .

[0079] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technology in the field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A damping ring, the damping ring being used to be installed on a spiral bevel gear, the spiral bevel gear having a damping ring groove for installing the damping ring; characterized in that: The damping ring includes a ring body having a circumferential opening and a first tooling hole and a second tooling hole are respectively arranged on both sides of the circumferential opening. The first tooling hole and the second tooling hole extend in the radial direction of the ring body and are arranged on the inner circumferential surface of the ring body.

2. The damping ring according to claim 1, characterized in that: The center line of the circumferential opening is inclined relative to the radial direction of the ring body.

3. The damping ring according to claim 2, characterized in that: The ring body has a radial line, and the angle between the center line of the circumferential opening and the radial line is α, 48°≤α≤52°; the angle between the extension direction of the first tooling hole and the radial line is β, 13°≤β≤17°; the angle between the extension direction of the second tooling hole and the radial line is γ, 58°≤γ≤62°; One end of the circumferential opening away from the center of the ring body extends toward a direction close to the first tooling hole.

4. The damping ring according to claim 1, characterized in that: The first tooling hole and the second tooling hole penetrate the ring body in a radial direction of the ring body.

5. The damping ring according to claim 1, characterized in that: The damping ring also has a silver-plated layer wrapped around the surface of the ring body; the thickness of the silver-plated layer is d, 0.02mm≤d≤0.05mm.

6. The damping ring according to claim 1, characterized in that: The cross section of the ring body is square, and the corners of the square are smoothly transitioned through rounded corners.

7. A damping ring disassembly and assembly tool, characterized in that: Used for disassembling and assembling the damping ring and the spiral bevel gear as described in any one of claims 1 to 6, the damping ring disassembly and assembly tool comprises at least two tooling pins, and the tooling pins have interconnected pin rods and clamping heads; the pin rod of one tooling pin is used for connecting with the first tooling hole, and the pin rod of the other tooling pin is used for connecting with the second tooling hole.

8. A damping ring production process, characterized in that: The damping ring production process is used to produce the damping ring according to any one of claims 1 to 6; the damping ring production process comprises: A wire drawing machine is used to draw the raw material to obtain wire material; Winding the wire material, and shearing it after winding to obtain an annular blank; heat treating the annular blank; Processing the heat-treated annular blank to form the circumferential opening; The annular blank is placed in the bottom of the punching tool, and after being flattened, a first tool hole and a second tool hole are opened on both sides of the circumferential opening to obtain the annular body.

9. The damping ring production process according to claim 8, characterized in that: The step of heat treating the annular blank comprises: Adjust the tempering furnace temperature to within the range of 305℃~315℃; After the temperature in the tempering furnace is stable for at least 20 minutes, the annular blank is placed in the tempering furnace for tempering, and the holding time is 80 minutes to 90 minutes; After the tempering is completed, the annular blank is taken out and cooled naturally.

10. The damping ring production process according to claim 8, characterized in that: The damping ring production process further comprises, after obtaining the ring body: polishing the ring body; The polished ring body is subjected to surface treatment to form a silver-plated layer on the surface of the ring body.

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