A method of sizing a high temperature alloy ring with an opening

Abstract

The application belongs to the technical field of metal material heat treatment, and particularly relates to a high-temperature alloy ring opening shaping method, which comprises the following steps: S101, machining and forming a ring-shaped ring; S102, cutting an opening on the ring; and S103, clamping the ring with the opening and performing heat treatment in the clamped state to finally shape the ring. The application performs heat treatment shaping on the ring in the clamped state, can guarantee the opening size of the high-temperature alloy ring part, can improve the manufacturing efficiency and qualified rate of the high-temperature ring, and can reduce the machining cost.

Description

Technical Field

[0001] The invention belongs to the technical field of heat treatment of metal materials, and particularly relates to a method for shaping the opening of a high-temperature alloy expansion ring. Background Art

[0002] For open expansion ring parts made of high-temperature alloy materials, the following processes are often used in existing technologies:

[0003] 1. Heat setting method for opening size processing: Immerse the part in high-temperature hot oil, heat it to a certain temperature, then take it out and set the opening to meet the final free state opening size of the part. This processing method has low setting efficiency and poor effect, and it is easy to cause the part to overheat and cause deformation or damage;

[0004] 2. Cold setting method for opening size processing: the part is placed in a special mold and pressurized to reach the set shape before cooling and solidification. This processing method is relatively complex, costly, and not very versatile;

[0005] 3. Cold machining for opening size: Using lathe cutting, wire cutting, bench grinding, and shape correction to ensure the opening size of the part in a free state, followed by stress relief to stabilize the opening. This machining method requires high bench skill, is inefficient, and has a low part qualification rate. Summary of the Invention

[0006] In view of this, the present invention provides a method for shaping the opening of a high-temperature alloy expansion ring, which adopts a forming method of performing heat treatment on the expansion ring in a clamped state, thereby ensuring the opening size of the warm alloy expansion ring part, while improving the manufacturing efficiency and pass rate of the high-temperature expansion ring and reducing processing costs.

[0007] The specific technical solution adopted in the present invention is:

[0008] A method for shaping the opening of a high-temperature alloy expansion ring comprises the following steps:

[0009] S101: Mechanically processed circular expansion ring;

[0010] S102: cutting an opening on the expansion ring;

[0011] S103: clamping the expansion ring with the cut opening and performing heat treatment in the clamped state to finalize the expansion ring;

[0012] The heat treatment method includes: heating the expansion ring to 845℃±10℃, keeping the temperature for 4

[0013] ±0.5h, after keeping warm, fill with 1Bar of argon and cool with a fan.

[0014] Furthermore, the heat treatment method further includes: after the first cooling with a fan, heating the temperature to 760°C±10°C again, keeping the temperature for 16±1h again, and filling with 1 Bar of argon gas and cooling with a fan again.

[0015] Furthermore, the vacuum degree during the second heat preservation process is (2-8)×10 -3 Pa.

[0016] Furthermore, in S103, the fixture for clamping the expansion ring includes:

[0017] The bottom plate has a disc-shaped main body and an upper end surface provided with a receiving groove for engaging the bottom end of the expansion ring;

[0018] A pressing plate is mounted on the bottom plate and clamps the expansion ring in the receiving groove;

[0019] A positioning key is provided at the opening to support the opening when the clamp is clamping the expansion ring.

[0020] Furthermore, a plurality of threaded holes uniformly distributed circumferentially are concentrically provided outside the ring of the accommodating groove, and the number of the pressure plates is multiple groups, and the multiple pressure plates cooperate with the multiple threaded holes to clamp the expansion ring in the accommodating groove.

[0021] Furthermore, the positioning key opens the expansion ring opening to a width that is 1.2-1.6 times the final required opening width.

[0022] Furthermore, the positioning key is installed on the base plate based on the threaded hole.

[0023] Furthermore, the clamp further comprises a support rod and an eye screw;

[0024] The support rod is installed at the center of the upper end surface of the base plate; and the eye screw is installed at one end of the support rod away from the base plate.

[0025] The beneficial effects of the present invention are:

[0026] This invention modifies the traditional expansion ring opening processing method, adopting a heat treatment shaping method and using a heat treatment shaping fixture to ensure the opening size of the expansion ring part. This invention effectively improves the opening size qualification rate and opening stability of high-temperature alloy expansion ring parts. By combining heat treatment and opening shaping, it reduces machining costs and has great application value in the field of heat treatment technology for expansion ring parts made of high-temperature alloy materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0028] Figure 1 This is a schematic structural diagram of a clamp in a specific embodiment of the present invention;

[0029] Figure 2 This is an upper end view of the bottom plate in a specific embodiment of the present invention;

[0030] Figure 3 A top view of a pressing plate in a specific embodiment of the present invention;

[0031] Figure 4 It is a front cross-sectional view of a pressing plate in a specific embodiment of the present invention;

[0032] Figure 5 This is a schematic structural diagram of a positioning key in a specific embodiment of the present invention;

[0033] Among them: 1. Base plate; 11. Receiving groove; 12. Threaded hole; 2. Press plate; 3. Support rod; 4. Eye screw; 5. Positioning key. DETAILED DESCRIPTION

[0034] The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0035] The following describes the embodiments of the present disclosure through specific examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. The present disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0036] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on this disclosure, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement an apparatus and / or practice a method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this apparatus and / or practice this method.

[0037] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present disclosure. The illustrations only show components related to the present disclosure and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0038] Additionally, in the following description, specific details are provided to provide a thorough understanding of the examples. However, one skilled in the art will appreciate that the aspects described can be practiced without these specific details.

[0039] In one embodiment of the present invention, a method for shaping the opening of a high-temperature alloy expansion ring is provided, comprising the following steps:

[0040] S101: Mechanically processed circular expansion ring;

[0041] S102: cutting an opening on the expansion ring;

[0042] S103: clamping the expansion ring with the cut opening and performing heat treatment in the clamped state to finalize the expansion ring;

[0043] The heat treatment method includes: heating the expansion ring to 845°C±10°C, keeping the temperature for 4±0.5h, filling the ring with 1 Bar of argon gas and cooling it with a fan.

[0044] In this embodiment, the heat treatment method further includes: after the first cooling with a fan, heating the temperature to 760°C±10°C again, keeping the temperature for 16±1h again, and filling with 1 Bar of argon gas and cooling with a fan again.

[0045] In this embodiment, the vacuum degree during the second heat preservation process is (2-8)×10-3Pa.

[0046] In this embodiment, in S103, Figure 1-5 As shown, the fixture for clamping the expansion ring includes:

[0047] The bottom plate 1 is disc-shaped, and the upper end surface is provided with a receiving groove 11 for engaging the bottom end of the expansion ring;

[0048] A pressing plate 2 is mounted on the bottom plate 1 to clamp the expansion ring in the receiving groove 11;

[0049] The positioning key 5 is provided at the opening to support the opening when the clamp is clamping the expansion ring.

[0050] In this embodiment, a plurality of threaded holes 12 are concentrically arranged outside the ring of the accommodating groove 11 and are evenly distributed circumferentially. The number of the pressure plates 2 is multiple groups, and the multiple pressure plates 2 cooperate with the multiple threaded holes 12 to clamp the expansion ring in the accommodating groove 11.

[0051] In this embodiment, the width of the expansion ring opening opened by the positioning key 5 is 1.2-1.6 times the final required opening width.

[0052] In this embodiment, the positioning key 5 is installed on the base plate 1 based on the threaded hole 12 .

[0053] In this embodiment, the clamp further includes a support rod 3 and an eye screw 4;

[0054] The support rod 3 is installed at the center of the upper end surface of the base plate 1 ; the eye screw 4 is installed at one end of the support rod 3 away from the base plate 1 .

[0055] The following is a further explanation using an expansion ring part made of GH738 material as an example. The overall process route of this embodiment is as follows:

[0056] Machining - cutting - heat treatment - opening size detection

[0057] The heat treatment setting is specifically as follows:

[0058] (1) Acceptance: Check if the surface of the parts has any defects such as bumps, rust, etc.

[0059] (2) Cleaning: Use anhydrous ethanol and white gauze to clean the dirt on the surface of parts and fixtures and air dry them

[0060] (3) Clamping: The parts are loaded into a special fixture

[0061] (4) Heat treatment: Heat to 845°C ± 10°C, hold for 4 ± 0.5 h, then fill with 1 Bar of argon and cool with a fan. Heat to 760°C ± 10°C, hold for 16 ± 1 h, then fill with 1 Bar of argon and cool with a fan. Vacuum during the holding process: (2 to 8) × 10-3 Pa.

[0062] (5) Inspection: Check hardness, tensile properties, endurance, and specimens; check free opening size 90-110, 100% inspection.

[0063] The fixture of this embodiment is generally composed of a base plate 1, a pressure plate 2, a positioning key 5, a support rod 3, a lifting eye screw 4, and a bolt 6. Considering the influence of the heat treatment setting temperature, the fixture material is made of high-temperature resistant GH625 material, wherein:

[0064] The bottom plate 1 adopts a 20mm thick disc-shaped structure to prevent the bottom plate 1 from deformation and fits well with the end face of the part to ensure that the end face of the part is flat. The threaded hole 12 is processed on the bottom plate 1 to facilitate connection with the support rod 3, positioning key 5, and pressure plate 2.

[0065] The pressing plate 2 is designed for different end surface conditions of parts. The end surface of the part is composed of multiple uneven protrusions, so multiple single pressing plates 2 are used. Threaded holes 12 are processed on the pressing plates 2 to adjust the height of the pressing plates 2 and their parallelism with the base plate 1.

[0066] The positioning key 5 opens the opening of the expansion ring part. It is necessary to consider the rebound of the opening after the part is heat treated and finalized. The key width can be adjusted according to the final opening requirements of the part. The part requires an opening of 90-110mm, and the key width is 140mm.

[0067] The support rod 3 and the eye screw 4 are used to lift parts and fixtures into the furnace, and are threadedly connected to the bottom plate 1 for easy disassembly and assembly.

[0068] Bolts are used to assemble and connect the various parts of the clamp. The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A method for shaping the opening of a high-temperature alloy expansion ring, characterized in that: The following steps are involved: S101: Mechanically processed circular expansion ring; S102: cutting an opening on the expansion ring; S103: clamping the expansion ring with the cut opening and performing heat treatment in the clamped state to finalize the expansion ring; The heat treatment method includes: heating the expansion ring to 845°C ± 10°C, keeping the temperature for 4 ± 0.5 hours, filling the ring with 1 Bar of argon gas and cooling it with a fan; After the first cooling with fan, the temperature is raised to 760℃±10℃ again, and the temperature is kept at this temperature for 16±1h. Then, 1Bar argon is filled and the fan is cooled again. The vacuum degree during the second cooling process is (2~8)×10 -3 Pa; In the S103, the fixture for clamping the expansion ring includes: The bottom plate has a disc-shaped main body and an upper end surface provided with a receiving groove for engaging the bottom end of the expansion ring; A pressing plate is mounted on the bottom plate and clamps the expansion ring in the receiving groove; A positioning key, arranged at the opening to support the opening when the clamp is clamping the expansion ring; The outer ring of the receiving groove is concentrically provided with a plurality of threaded holes evenly distributed in the circumferential direction. The number of the pressing plates is multiple groups, and the multiple pressing plates cooperate with the multiple threaded holes to clamp the expansion ring in the receiving groove; The width of the expansion ring opening opened by the positioning key is 1.2-1.6 times the final required opening width.

2. The high-temperature alloy expansion ring opening shaping method according to claim 1, characterized in that: The positioning key is installed on the base plate based on the threaded hole.

3. The high-temperature alloy expansion ring opening shaping method according to claim 2, characterized in that: The clamp also includes a support rod and an eye screw; The support rod is installed at the center of the upper end surface of the base plate; and the eye screw is installed at one end of the support rod away from the base plate.

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