Heat treatment anti-deformation tool for annular workpiece
By designing a heat treatment and deformation-proof tool for annular workpieces, the combination of support blocks and limit fixtures is used to solve the problem of excessive deformation of the outer barrel of the axial flow compressor during the heat treatment stress release process, effective control of the annular workpiece is achieved, and the dimensional stability of the parts is ensured.
Patent Information
- Application Number
- CN202422018397.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-20
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-08-20
AI Technical Summary
During the heat treatment stress release process of the outer cylinder of the axial flow compressor, the cylinder walls of the first half ring and the second half ring are prone to slalom, resulting in opening of the connection surface, causing excessive deformation of the parts to be excessively missed, and even scrapped.
A heat treatment anti-deformation tool for an annular workpiece is designed, including a base plate, a plurality of support blocks and a plurality of limit fixtures. A support block is arranged on the bottom plate to support the annular workpiece; the limiting fixture is arranged on the side wall of the annular workpiece through the open end to limit the deformation of its side wall.
Through the combination of support blocks and limit fixtures, the deformation range of the annular workpiece in the diameter and thickness directions is effectively controlled, ensuring that the dimensions meet the requirements after stress release, and avoiding deformation and scrapping of parts.
Smart Images
Figure CN222975250U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of heat treatment, and particularly relates to a heat treatment anti-deformation tooling for annular workpieces. Background Art
[0002] The outer cylinder is the static blade angle adjustment mechanism of an axial flow compressor. It is connected to the static blades through connecting rods and some adjustment devices. By rotating the outer cylinder in the circumferential direction, the purpose of adjusting the static blade angle can be achieved, thereby realizing the purpose of changing the inlet and outlet flow rates of the axial flow compressor to meet different working conditions requirements. The outer cylinder of the axial flow compressor belongs to a large-diameter thin-walled ring structure, and is mostly produced by sand casting. It is generally composed of a first half-ring and a second half-ring. During the heat treatment stress release process, the barrel walls of the first half-ring and the second half-ring are prone to wobbling, resulting in openings at the connection surfaces of the first half-ring and the second half-ring, thereby causing the deformation amount of the part to be too large and out of tolerance, resulting in scrapping. Content of the Utility Model
[0003] Therefore, the technical problem to be solved by the utility model is to provide a heat treatment anti-deformation tooling for annular workpieces, which can control the deformation amount during the stress relief process of the annular workpiece and ensure that the size of the annular workpiece meets the relevant technical requirements after stress release.
[0004] To solve the above problems, the utility model provides a heat treatment anti-deformation tooling for annular workpieces, including: a bottom plate, a plurality of support blocks, and a plurality of limit clamps. The support blocks are arranged on the bottom plate. The top surfaces of the plurality of support blocks are flush to support the annular workpiece. The limit clamp is U-shaped, including an open end and a closed end. The open end is detachably connected to the bottom plate. The limit clamp can be buckled on the side wall of the annular workpiece through the open end to limit the deformation of the side wall of the annular workpiece.
[0005] Optionally, the heat treatment anti-deformation tooling for annular workpieces further includes: lifting lugs. The lifting lugs are symmetrically arranged on both sides of the bottom plate.
[0006] Optionally, the lifting lug is stepped, including a large-diameter section and a small-diameter section connected to each other. One end of the small-diameter section away from the large-diameter section is connected to the side surface of the bottom plate.
[0007] Optionally, the plurality of support blocks are divided into two groups. The two groups of support blocks respectively support on the opposite sides of the annular workpiece.
[0008] Optionally, the annular workpiece is composed of a first half-ring and a second half-ring. Among the plurality of support blocks, some respectively support at the connection of the first half-ring and the second half-ring and on the left and right sides of the connection.
[0009] Optionally, the support blocks and the limit clamps are arranged at intervals.
[0010] Optionally, the heat treatment deformation prevention tooling for the annular workpiece further includes: a plurality of spare jigs. The spare jigs have the same shape as the limit jigs but different sizes.
[0011] Optionally, the flatness of the top surface of the support block and the bottom surface of the bottom plate is ≤ 0.1.
[0012] Beneficial effects
[0013] In the embodiment of the present utility model, the heat treatment deformation prevention tooling for the annular workpiece includes a bottom plate, a plurality of support blocks, and a plurality of limit jigs. The support blocks are arranged on the bottom plate and are used to support the annular workpiece. When in use, place the tooling of this embodiment in the heat treatment furnace with the side where the support blocks are located facing upward. Place the annular workpiece on the plurality of support blocks, and then buckle the limit jigs on the side wall of the annular workpiece through the open ends and detachably connect the open ends of the limit jigs to the bottom plate to limit the deformation of the side wall of the annular workpiece. Use the support blocks to support the annular workpiece and use the limit jigs to limit the deformation amount of the side wall of the annular workpiece, which can effectively control the deformation amount range of the workpiece in the diameter and thickness directions. And the structure of this tooling is simple, which can avoid the problem that the complex structure deforms in a high-temperature environment, resulting in the tooling itself losing its original function or being unable to be smoothly removed due to the deformation of the tooling after the heat treatment is completed. Description of the drawings
[0014] Figure 1 It is a top view of a heat treatment deformation prevention tooling for an annular workpiece provided by the present utility model;
[0015] Figure 2 It is a front view of a heat treatment deformation prevention tooling for an annular workpiece provided by the present utility model;
[0016] Figure 3 It is a schematic diagram of the use state of a limit jig provided by the present utility model.
[0017] The reference numerals are shown as:
[0018] 1. Bottom plate; 2. Support block; 3. Limit jig; 4. Lifting lug; 5. Annular workpiece;
[0019] 51. First half ring; 52. Second half ring. Detailed implementation manners
[0020] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.
[0021] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is two or more unless otherwise specifically defined.
[0022] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0023] The following is a description of the preferred embodiments of the present utility model with reference to the drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present utility model and are not used to limit the present utility model.
[0024] This embodiment provides a heat treatment anti-deformation tooling for annular workpieces. Figure 1 This is a top view of a heat treatment anti-deformation tooling for annular workpieces provided in this embodiment. Figure 2 This is a front view of a heat treatment anti-deformation tooling for annular workpieces provided in this embodiment. Figure 3 This is a schematic diagram of the use state of a limit fixture provided in this embodiment.
[0025] As Figures 1 to 3As shown in the figure, a heat treatment anti-deformation tooling for annular workpieces in this embodiment includes: a bottom plate 1, a plurality of support blocks 2, and a plurality of limiting jigs 3. The support blocks 2 are arranged on the bottom plate 1. The top surfaces of the plurality of support blocks 2 are flush to support the annular workpiece 5. The limiting jig 3 is U-shaped and includes an open end and a closed end. The open end is detachably connected to the bottom plate 1. The limiting jig 3 can be buckled on the side wall of the annular workpiece 5 through the open end to limit the deformation of the side wall of the annular workpiece 5.
[0026] In this embodiment, the connection method between the support block 2 and the bottom plate 1 can be a fixed connection, such as welding or integrally forming the support block 2 and the bottom plate 1. Set in this way, it is firm and durable, and easy to process, which is beneficial to ensuring the height consistency of the top surfaces of the plurality of support blocks 2. However, in other embodiments, the support block 2 and the bottom plate 1 can also adopt a detachable connection method, such as plug connection, bolt connection, etc., for easy assembly and disassembly.
[0027] In this embodiment, the bottom plate 1, the support block 2, and the limiting jig 3 are preferably made of metal materials to be applicable to use in a heat treatment furnace.
[0028] In this embodiment, the open end of the limiting jig 3 is detachably connected to the bottom plate 1, and the connection method can adopt spot welding, screw connection or plug connection. The connection method is preferably spot welding, which is convenient for installation and disassembly, and the connection is firm and reliable.
[0029] The heat treatment anti-deformation tooling for annular workpieces provided in this embodiment includes a bottom plate 1, a plurality of support blocks 2, and a plurality of limiting jigs 3. The support blocks 2 are arranged on the bottom plate 1 and are used to support the annular workpiece 5. During use, place the tooling of this embodiment in the heat treatment furnace with the side where the support blocks 2 are located facing up. Place the annular workpiece 5 on the top surfaces of the plurality of support blocks 2, and then buckle the limiting jig 3 on the side wall of the annular workpiece 5 through the open end and detachably connect the open end of the limiting jig 5 to the bottom plate 1 to limit the deformation of the side wall of the annular workpiece 5. Use the support blocks 2 to support the annular workpiece 5 and use the limiting jig 3 to limit the deformation amount of the side wall of the annular workpiece 5, which can effectively control the deformation amount range of the annular workpiece 5 in the diameter and thickness directions. And the structure of this tooling is simple, which can avoid the problem that the complex structure deforms in a high-temperature environment, resulting in the tooling itself losing its original function or being unable to be smoothly removed due to the deformation of the tooling after heat treatment. In addition, in this embodiment, a plurality of support blocks 2 are arranged on the bottom plate 1 to support the annular workpiece 5, and the top surface of the support block 2 is in contact with the annular workpiece 5, reducing the contact area between the tooling and the annular workpiece 5, so the processing difficulty of the anti-deformation tooling is reduced.
[0030] In some embodiments, as Figures 1 to 2 shown, the heat treatment anti-deformation tooling for annular workpieces further includes: lifting lugs 4. The lifting lugs 4 are symmetrically arranged on both sides of the bottom plate 1.
[0031] The lifting lug 4 and the bottom plate 1 in this embodiment can be of an integrally formed structure or a split structure design, and the lifting lug 4 is installed on the bottom plate 1 by connection means such as welding or bolting.
[0032] In some examples, such as Figure 1 shown, there are four lifting lugs 4, symmetrically arranged on the left and right sides of the bottom plate 1. With such an arrangement, the tooling can be more stable during hoisting and handling.
[0033] The lifting lugs 4 are symmetrically arranged on both sides of the bottom plate 1 in this embodiment, which facilitates the hoisting and handling of the tooling and makes it more convenient to use.
[0034] In some embodiments, such as Figures 1 to 2 shown, the lifting lug 4 is in a stepped shape, including a large-diameter section and a small-diameter section connected to each other. One end of the small-diameter section far from the large-diameter section is connected to the side surface of the bottom plate 1.
[0035] The lifting lug 4 in this embodiment can be a stepped cylinder or a stepped prism, and this embodiment does not impose too many restrictions on this. The lifting lug 4 in this embodiment is in a stepped shape, including a large-diameter section and a small-diameter section connected to each other. Among them, the small-diameter section is connected to the side surface of the bottom plate 1, so a limiting groove can be formed between the large-diameter section and the side surface of the bottom plate 1. When hoisting, the hoisting rope can be placed in the limiting groove, making the hoisting and movement of the tooling more stable and reliable, and avoiding potential safety hazards.
[0036] In some embodiments, such as Figure 1 shown, the multiple support blocks 2 are divided into two groups. The two groups of support blocks 2 respectively support on the opposite sides of the annular workpiece 5.
[0037] The multiple support blocks 2 in this embodiment are divided into two groups and respectively support on the opposite sides of the annular workpiece 5. The support blocks 2 on each side are evenly distributed, which can play a good supporting role for the annular workpiece 5 and the force is balanced.
[0038] In some embodiments, such as Figures 1 to 2 shown, the annular workpiece 5 is composed of a first half-ring 51 and a second half-ring 52. The multiple support blocks 2 respectively support at the connection of the first half-ring 51 and the second half-ring 52 and on the left and right sides of the connection. The multiple support blocks 2 in this embodiment respectively support at the connection of the first half-ring 51 and the second half-ring 52 and on the left and right sides of the connection, which can play a good supporting and limiting role for the connection of the annular workpiece 5, is beneficial to reducing the deformation amount at the connection of the first half-ring 51 and the second half-ring 52, and further improves the qualified product rate.
[0039] In some embodiments, such as Figures 1 to 2As shown, the support blocks 2 and the limit fixtures 3 are arranged at intervals. In this embodiment, the support blocks 2 and the limit fixtures 3 are arranged at intervals, that is, the limit fixtures 3 are arranged between two adjacent support blocks 2, which can avoid interference between the support blocks 2 and the limit fixtures 3 and facilitate the installation and disassembly of the limit fixtures 3.
[0040] In some embodiments, as shown in FIGS. 1 to 3, the heat treatment anti-deformation tooling for annular workpieces further includes: a plurality of spare fixtures. The spare fixtures have the same shape as the limit fixtures 3 but different sizes. The spare fixtures have the same shape as the limit fixtures 3 but different sizes, that is, the spare fixtures are also U-shaped, but the limit widths and heights of the spare fixtures and the limit fixtures 3 are different to be applicable to annular workpieces of different sizes or annular workpieces with different deformation amount requirements.
[0041] In some embodiments, as Figures 1 to 3 shown, the flatness of the top surface of the support block 2 and the bottom surface of the bottom plate 1 ≤ 0.1. As Figure 3 shown, the bottom surface of the bottom plate 1 refers to the surface of the bottom plate 1 on the side away from the support block 2, and the top surface of the support block 2 refers to the surface of the support block 2 on the side away from the bottom plate 1. The flatness of both is ≤ 0.1, so it can meet the flatness requirement and ensure that the support surface of the annular workpiece 5 has good flatness.
[0042] The above introduced the heat treatment anti-deformation tooling for annular workpieces (hereinafter referred to as the tooling) of this embodiment. When manufacturing the tooling of this embodiment, first, the bottom plate 1 needs to be machined. After ensuring that the machined bottom plate 1 meets the relevant size and flatness requirements, the support blocks 2 are machined. After ensuring that all the support blocks 2 meet their size requirements, according to the positions marked in the drawing, the support blocks 2 are welded to the bottom plate 1 one by one at the corresponding positions and angles. After welding, the top surface of the support block 2 is machined to ensure that the flatness of the top surface of the support block 2 and the bottom surface of the base 1 is ≤ 0.1. Then, the lifting lugs 4 are machined as required. After machining, according to the drawing markings, the lifting lugs 4 are welded at the corresponding positions on the bottom plate 1. Thus, the support platform group for supporting the annular workpiece 5 of this tooling is completed. The limit fixture 3 is an important component for controlling the deformation amount of the annular workpiece 5. According to the actual production requirements, this tooling can design three sets of U-shaped spare fixtures. The heights and widths of the U-shaped notches of the three sets of spare fixtures are different from those of the limit fixture 3, and the other dimensions are the same. The heights and widths of the U-shaped notches of each set of spare fixtures are different, which can limit the deformation amounts of the annular workpiece 5 in the axial direction and the wall thickness direction during the stress relief process.
[0043] During the stress relief process of large-diameter thin-walled ring-shaped parts, when using this tooling to limit the deformation amount, first place the tooling flat on the bottom of the heat treatment furnace chamber with the support block 2 facing upwards, then place the ring-shaped workpiece 5 that needs stress relief flat on the support block 2. After that, select a suitable limiting fixture 3 or spare fixture, and clamp the side wall of the ring-shaped workpiece 5 at the U-shaped gap of the limiting fixture 3 or spare fixture. The two feet at the open end of the limiting fixture 3 or spare fixture are spot-welded to the bottom plate 1. Note that the placement position of the limiting fixture 3 or spare fixture should avoid the support block 2 to ensure that the flatness of the surface of the support block 2 is not damaged. In this way, during the stress relief process of the part, the height of the U-shaped gap of the limiting fixture 3 or spare fixture can effectively control the wobble of the ring-shaped workpiece 5 in the thickness direction (i.e., the axial direction), and the width of the U-shaped gap can effectively control the wobble of the ring-shaped workpiece 5 in the wall thickness direction (i.e., the radial direction). By spot-welding the limiting fixture 3 or spare fixture at multiple points in the circumferential direction, the width of the U-shaped gap of the limiting fixture 3 or spare fixture can effectively control the opening deformation at the mid-plane of the ring-shaped workpiece 5 (i.e., the connection between the first half-ring 51 and the second half-ring 52), ensuring that after stress release, the deformation amount of the ring-shaped workpiece 5 is within the controllable range and avoiding workpiece scrapping.
[0044] The limiting fixture 3 of this embodiment is spot-welded to the bottom plate 1, which is convenient for disassembly and reuse, has a wide universality, and a set of tooling can be applied to the stress relief treatment of thin-walled ring parts with a variety of diameter ranges and thickness ranges. Just select a suitable limiting fixture and a suitable installation position, and the deformation amount range during the stress relief process of the workpiece can be roughly controlled as needed, and the deformation amount ranges in the diameter and thickness directions of the workpiece can be effectively controlled.
[0045] During actual use, the limiting fixture 3 and multiple sets of spare fixtures can be designed according to the size requirements of the ring-shaped workpiece to meet the needs of different-sized ring-shaped workpieces 5 and different deformation amount ranges, and avoid cost waste caused by repeated design of the entire tooling. When heat-treating the ring-shaped workpiece 5, using the tooling of this embodiment can avoid the deformation of some complex-structured toolings themselves in a high-temperature environment, resulting in the loss of their original functions, or the inability to be smoothly disassembled due to the deformation of the tooling after heat treatment.
[0046] It is easy for those skilled in the art to understand that on the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.
[0047] The above is only the preferred embodiment of the present invention, and it is not used to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The above is only the preferred implementation manner of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.
Claims
1. A heat treatment anti-deformation tool for annular workpieces, characterized in that: include: Base plate; A plurality of support blocks are arranged on the bottom plate; The top surfaces of the plurality of support blocks are flush to support the annular workpiece; A plurality of limiting clamps are provided, wherein the limiting clamps are U-shaped and include an open end and a closed end; the open end is detachably connected to the base plate; the limiting clamps can be buckled on the side wall of the annular workpiece through the open end to limit the deformation of the side wall of the annular workpiece.
2. The heat treatment anti-deformation tool for annular workpieces according to claim 1, characterized in that: Also includes: Lugs; The lifting ears are symmetrically arranged on both sides of the bottom plate.
3. The heat treatment anti-deformation tool for annular workpieces according to claim 2, characterized in that: The lifting lug is in a stepped shape, including a large diameter section and a small diameter section connected to each other; One end of the small diameter section away from the large diameter section is connected to the side surface of the bottom plate.
4. The heat treatment anti-deformation tool for annular workpieces according to claim 1, characterized in that: The plurality of support blocks are divided into two groups; the two groups of support blocks are respectively supported on two opposite sides of the annular workpiece.
5. The heat treatment anti-deformation tool for annular workpieces according to claim 1, characterized in that: The annular workpiece is composed of a first half ring and a second half ring; the plurality of support blocks are respectively supported at the connection between the first half ring and the second half ring and at both sides of the connection.
6. The heat treatment anti-deformation tool for annular workpieces according to claim 1, characterized in that: The support block and the limiting clamp are arranged at a distance.
7. The heat treatment anti-deformation tool for annular workpieces according to claim 1, characterized in that: Also includes: Multiple spare clamps; The spare clamp and the limiting clamp have the same shape but different sizes.
8. The heat treatment anti-deformation tool for annular workpieces according to claim 1, characterized in that: The flatness of the top surface of the support block and the bottom surface of the bottom plate is ≤0.1.