A clamping device and a heat treatment method

Abstract

The application relates to a clamping device and a heat treatment method for clamping a semi-closed sleeve to be heat treated, which comprises a base for fixedly mounting the semi-closed sleeve and an exhaust assembly mounted on the base and partially located in the cylinder of the semi-closed sleeve after the base and the semi-closed sleeve are assembled, which is used for exhausting the air in the cylinder of the semi-closed sleeve to the outside of the cylinder during heat treatment of the semi-closed sleeve. By fixing the semi-closed sleeve on the base, the influence of the buoyancy and water flow excitation generated during the water quenching treatment on the flange end face flatness and the cylinder diameter of the semi-closed sleeve is weakened by exhausting the air generated in the semi-closed sleeve during the water quenching treatment by the exhaust assembly, the difficulty of the shape correction after the water quenching treatment is reduced, and the manufacturing precision of the heat treatment is improved.

Description

Technical Field

[0001] This invention relates to the field of heat treatment technology, and in particular to a clamping device and a heat treatment method. Background Technology

[0002] Semi-enclosed sleeve structures are widely used in aircraft, with cable retractable sleeves being a typical example. The main function of a cable retractable sleeve is to provide movement space for the cable retractor within the aircraft wing fuel tank; therefore, it is often a thin-walled, shell-shaped, semi-enclosed cantilever beam structure. A typical structural form of a cable retractable sleeve 100 is shown below. Figure 1 As shown, it is welded from flange 101 and cylinder 102. The diameter Ф2 of cylinder 102 is between 100mm and 200mm. Flange 101 has a variable or constant cross-section structure with a certain curvature, and its smaller diameter is Ф1, where Ф1 ≤ Ф2. The wall thickness of sleeve 100 is between 2mm and 5mm, and the length H of sleeve 100 is between 200mm and 500mm.

[0003] To achieve effective weight reduction, the sleeve 100 is generally made of 6061 aluminum alloy. According to the manufacturing process, after the flange 101 and the cylinder 102 are welded together to form the integral sleeve structure, the entire sleeve structure needs to undergo solution aging heat treatment to meet strength requirements. The solution aging heat treatment regime is as follows: solution temperature 530℃±5℃, solution time 50min±5min, with the part completed from furnace exit to water immersion within 15 seconds; aging temperature 165℃±5℃, aging time 8h±10min.

[0004] Due to the limited installation position of the sleeve inside the wing fuel tank, the geometric dimensional accuracy requirements for the sleeve are very high, namely, the manufacturing tolerance of H is ±1.0mm, and the manufacturing tolerances of Ф1 and Ф2 are both ±1.0mm.

[0005] Currently, there are two main heat treatment methods for sleeve-type structures. The first, a common approach, involves fixing the sleeve in a dedicated heat treatment fixture with the open end facing upwards, directly performing solution treatment and water quenching. After water quenching, the sleeve is removed from the fixture, reshaped, and then placed in an aging furnace for aging treatment. The dimensional accuracy of the sleeve after aging is essentially the same as that after water quenching. The second method involves keeping the sleeve vertical with the open end facing downwards during solution treatment and water quenching. Afterwards, the sleeve is also removed from the heat treatment fixture, reshaped, and then placed in an aging furnace for aging treatment. The main difference between the two methods lies in the water immersion method for the sleeve.

[0006] In the first water quenching method, the heat treatment fixture clamping sleeve is directly immersed in water. After the water submerges the flange end face, water is directly poured into the sleeve's interior. During this water quenching process, the cavity inside the sleeve creates significant buoyancy. Under the rigid constraint of the flange end face installation, this buoyancy not only causes some warping deformation (i.e., free deformation) of the flange end face but also affects the surface accuracy of the sleeve. Simultaneously, during the rapid water quenching process, the instant water enters the sleeve through its open end, it generates violent water flow vibration, causing a strong impact on the sleeve diameter and resulting in some free deformation, i.e., uncontrollable deformation. While the above heat treatment method, followed by shaping, can meet the dimensional accuracy requirements of the sleeve, the shaping process is labor-intensive and inefficient. The second method is more suitable for sleeve structures with a drain hole of a certain size at the tail. During water quenching, the air inside the sleeve escapes quickly from the sleeve cavity through the through hole in the middle of the drain nozzle, thereby reducing the buoyancy and water flow vibration generated during water quenching, weakening the impact of buoyancy and water flow vibration on the dimensional deformation of the sleeve, and reducing the difficulty of shaping after water quenching. However, semi-enclosed sleeves, such as cable expansion pipe sleeves, do not have a drain nozzle at the tail, so the second heat treatment method is not suitable for semi-enclosed sleeves such as cable expansion pipe sleeves. Summary of the Invention

[0007] (1) Technical problems to be solved

[0008] This invention proposes a clamping device and a heat treatment method. The clamping device clamps a semi-enclosed sleeve, and then the semi-enclosed sleeve and the clamping device as a whole are subjected to solution heat treatment and water quenching treatment in sequence. The air exhaust component of the clamping device is used to expel the air inside the semi-enclosed sleeve during the water quenching treatment, thereby weakening the influence of buoyancy and water flow vibration generated during the water quenching treatment on the flatness of the flange end face and the cylinder diameter of the semi-enclosed sleeve, reducing the difficulty of shaping after water quenching treatment, and improving the manufacturing precision of heat treatment.

[0009] (2) Technical solution

[0010] In a first aspect, embodiments of the present invention provide a clamping device for clamping a semi-enclosed sleeve to be heat-treated. The semi-enclosed sleeve includes a cylinder and a flange welded to the cylinder, and includes a base for fixing the semi-enclosed sleeve in place; and an exhaust assembly installed on the base and partially located inside the cylinder after the base and the semi-enclosed sleeve are assembled, for exhausting air from inside the cylinder to the outside of the cylinder during heat treatment of the semi-enclosed sleeve.

[0011] Furthermore, the exhaust assembly includes a support column mounted on the base and at least two exhaust pipes connected to the support column. The other end of each exhaust pipe extends into the cylinder of the semi-enclosed sleeve mounted on the base. The other end of the support column is provided with at least two exhaust holes, and the support column is provided with an airflow channel. The exhaust pipes are all connected to the exhaust holes through the airflow channel.

[0012] Furthermore, the sum of the cross-sectional areas of the hollow channels of each exhaust pipe is less than or equal to the cross-sectional area of ​​the airflow channel of the support column, and the cross-sectional area of ​​the airflow channel of the support column is less than or equal to the sum of the areas of each exhaust hole.

[0013] Furthermore, each of the exhaust pipes passes through the base, and the end of each exhaust pipe connected to the load-bearing column is located on the same side of the base.

[0014] Furthermore, the support column extends through the base, and one end of the support column that connects to each of the exhaust pipes is located on the side of the base away from the exhaust port.

[0015] Furthermore, the clamping device also includes a lifting assembly, which is installed on the support column at the end away from the end connected to the exhaust pipe. The lifting assembly includes a cover plate installed on the support column at the end away from the end connected to the exhaust pipe and a lifting ring threadedly connected to the cover plate. The lifting ring is located at the end of the cover plate away from the support column.

[0016] Furthermore, the base is also equipped with a positioning base plate, which is arranged at an angle on the base. The positioning base plate is provided with a first groove for assembling the flange and adapted to the outer contour of the flange. The base is provided with a first through hole for the exhaust pipe to pass through and a second through hole for installing the load-bearing column. The positioning base plate is provided with a third through hole for the exhaust pipe to pass through. Both the first through hole and the third through hole are located below the central through hole of the flange assembled on the positioning base plate. The third through hole is located between the first through hole and the central through hole of the flange.

[0017] Furthermore, it also includes a pressure plate, which is fixedly installed on the positioning base plate and cooperates with the positioning base plate to fix the flange of the semi-enclosed sleeve on the positioning base plate. The pressure plate is provided with a second groove that matches the outer contour of the flange. The first groove and the second groove cooperate to clamp the two sides of the flange.

[0018] Furthermore, each of the exhaust pipes is equipped with a sleeve, and the maximum vertical distance from the end of the sleeve away from the exhaust pipe to the bottom surface of the inner wall of the cylinder is h1, 10mm≤h1≤20mm. The minimum vertical distance from each exhaust hole to the bottom surface of the outer wall of the cylinder is h2, h2≥30mm. The base is provided with a support leg at the end away from the exhaust hole, and the support legs are evenly distributed on the base along the axis of the support column.

[0019] In a second aspect, embodiments of the present invention provide a heat treatment method for heat treating the semi-enclosed sleeve held on the clamping device provided in the first aspect, comprising: S110: cleaning the clamping device; S120: fixing the semi-enclosed sleeve on the clamping device; S130: hoisting the clamping device of step S120 to a solution heat treatment furnace to complete the solution heat treatment; S140: removing the clamping device after the solution heat treatment from the solution heat treatment furnace and quickly entering a water quenching tank to complete the water quenching treatment; S150: removing the clamping device after the water quenching treatment from the water quenching tank, removing the semi-enclosed sleeve from the clamping device, detecting the deformation of the flange end face and performing shape correction; S160: placing the semi-enclosed sleeve of step S150 into an aging heat treatment furnace to complete the aging treatment, thereby obtaining the semi-enclosed sleeve that meets the requirements.

[0020] (3) Beneficial effects

[0021] In summary, this invention fixes the semi-enclosed sleeve to be heat-treated on the base of the clamping device. Utilizing the clamping device's stability, the air generated within the semi-enclosed sleeve during heat treatment, especially water quenching, is expelled by an exhaust assembly extending into the sleeve. This reduces buoyancy and water flow vibration during water quenching, weakening their impact on the sleeve's dimensional deformation, particularly on the flange end face flatness and cylinder diameter. This also reduces the difficulty of post-quenching reshaping and improves manufacturing precision during heat treatment. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a semi-enclosed sleeve in the prior art.

[0024] Figure 2 This is a schematic diagram of the clamping device of the present invention.

[0025] Figure 3 This is a schematic flowchart of the heat treatment method of the present invention.

[0026] In the picture:

[0027] 100 - Semi-enclosed sleeve; 101 - Flange; 102 - Cylinder body;

[0028] 1-Base; 11-First through hole; 12-Second through hole;

[0029] 2-Positioning base plate; 21-First groove; 22-Third through hole;

[0030] 3-Pressure plate; 31-Second groove;

[0031] 4-Exhaust pipe; 41-First pipe; 42-Second pipe;

[0032] 5-Sleeve; 6-Bearing column; 61-Airflow channel; 7-Cover plate; 8-Lifting ring; 9-Exhaust hole; 10-Outrigger. Detailed Implementation

[0033] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of the present invention by way of example, but should not be used to limit the scope of the present invention. That is, the present invention is not limited to the described embodiments, and any modifications, substitutions and improvements to the parts, components and connection methods are covered without departing from the spirit of the present invention.

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] Figure 2 This is a schematic diagram of the structure of a clamping device according to an embodiment of the present invention, as shown below. Figure 1 and Figure 2As shown, the clamping device is used to clamp a semi-enclosed sleeve 100 to be heat-treated. The semi-enclosed sleeve 100 includes a cylinder 102 and a flange 101 welded to the cylinder 102. The clamping device includes a base 1 and an exhaust assembly. The base 1 is used to fix the semi-enclosed sleeve 100. Specifically, the base 1 can be fixedly connected to the flange 101 by bolts, screws, or clamps. The exhaust assembly is installed on the base 1 and is partially located inside the cylinder 102 after the base 1 and the semi-enclosed sleeve 100 are assembled. It is used to exhaust the air inside the cylinder 102 to the outside of the cylinder 102 when the semi-enclosed sleeve 100 is heat-treated.

[0036] This invention fixes a semi-enclosed sleeve to be heat-treated on the base of a clamping device. Utilizing the clamping device's stability, the semi-enclosed sleeve undergoes heat treatment, especially water quenching. An exhaust assembly extending into the sleeve removes air generated during water quenching, reducing buoyancy and water flow vibration. This weakens the impact of buoyancy and water flow vibration on the sleeve's dimensional deformation, particularly on the flange end face flatness and cylinder diameter. It also reduces the difficulty of post-quenching reshaping and improves manufacturing precision.

[0037] As a preferred embodiment, such as Figure 2 As shown, the exhaust assembly includes a support column 6 mounted on the base 1 and at least two exhaust pipes 4 connected to the support column 6. The other end of each exhaust pipe 4 (i.e., the end away from the exhaust pipe 4 connected to the support column 6) extends into the cylinder 102 of the semi-enclosed sleeve 100 mounted on the base 1. The other end of the support column 6 (i.e., the end away from the support column 6 connected to the exhaust pipe 4) is provided with at least two exhaust holes 9 (the exhaust holes 9 are evenly arranged along the circumference of the support column 6, and the number is preferably 2-6). The support column 6 is also provided with an airflow channel 61. Each exhaust pipe 4 is connected to each exhaust hole 9 through the airflow channel 61. The air generated by the semi-enclosed sleeve 100 during the heat treatment process is discharged to the outside of the cylinder 102 through the exhaust holes 9 by the airflow channel 61 inside the support column 6. Specifically, the load-bearing column 6 and each exhaust pipe 4 are either integrally formed or separate structures, preferably separate structures. The load-bearing column 6 can be configured to penetrate the base 1 or not, and similarly, each exhaust pipe 4 can be configured to penetrate the base 1, not, or partially penetrate the base 1. Specifically, the load-bearing column 6 penetrates the base 1, and the connection points of each exhaust pipe 4 and the load-bearing column 6 are all located below the base 1 (e.g., ...). Figure 2(As shown); if the support column 6 does not penetrate the base 1, both ends of each exhaust pipe 4 penetrate the base 1, and the connection point between each exhaust pipe 4 and the support column 6 is located above the base 1; if neither the support column 6 nor each exhaust pipe 4 penetrates the base 1, then the connection point between each exhaust pipe 4 and the support column 6 is located above the base 1. There are other connection methods or installation positions between the support column 6 and each exhaust pipe 4, but as long as each exhaust pipe 4 is connected to the exhaust hole 9, it is within the protection scope of this invention.

[0038] As another preferred implementation, such as Figure 2 As shown, Figure 2 As shown, the sum of the cross-sectional areas of the hollow channels of each exhaust pipe 4 is less than or equal to the cross-sectional area of ​​the airflow channel 61 of the support column 6, and the cross-sectional area of ​​the airflow channel 61 of the support column 6 is less than or equal to the sum of the areas of each exhaust hole 9. This is to ensure smooth exhaust of steam from the inner cavity of the sleeve during the heat treatment process when multiple sleeves are heat-treated simultaneously. It should be noted that the cross-sectional areas of the hollow channels of each exhaust pipe 4 can be the same or different. If they are different, that is, the cross-sectional area of ​​the hollow channel of a single exhaust pipe 4 is gradually changing, then the sum of the cross-sectional areas of the smallest hollow channels of all exhaust pipes 4 should be less than or equal to the cross-sectional area of ​​the airflow channel 61 of the support column 6. If the cross-sectional area of ​​the airflow channel 61 of the support column 6 also adopts a gradually changing structure, then the sum of the cross-sectional areas of the smallest hollow channels on all exhaust pipes 4 is less than or equal to the smallest cross-sectional area of ​​the airflow channel 61 of the support column 6. Figure 2 As shown, the hollow channel is located inside the exhaust pipe 4, and each hollow channel is connected to each exhaust port 9 through the airflow channel 61, as shown. Figure 2 As indicated by the arrows, the airflow direction indicates that the air generated during the water quenching process of the semi-enclosed sleeve is discharged from the inside of the cylinder 102 after passing through the hollow channel, the airflow channel 61, and the exhaust hole 9 in sequence.

[0039] As another alternative implementation method.

[0040] Preferably, such as Figure 2As shown, each exhaust pipe 4 penetrates the base 1, and the end of each exhaust pipe 4 connected to the support column 6 is located on the same side of the base 1. The exhaust pipe 4 has a U-shaped structure, including a first pipe 41, a second pipe 42, and a third pipe (not shown in the figure) connected in sequence. The first pipe 41 and the third pipe are perpendicular to each other and parallel to each other. The first pipe 41 and the third pipe both penetrate the base 1, that is, the base 1 has the same number of first through holes 11 as the first pipe 41 and the same number of second through holes 12 as the third pipe. The first through hole 11 is penetrated by the corresponding first pipe 41, and the second through hole 12 is penetrated by the corresponding third pipe. The end of the third pipe near the exhaust hole 9 is connected to the support column 6 and communicates with the airflow channel 61.

[0041] Preferably, such as Figure 2 As shown, the support column 6 penetrates the base 1, and the end of the support column 6 connected to each exhaust pipe 4 is located on the side of the base 1 away from the exhaust hole 9. All the third pipes are components of the support column 6, that is, the part of the support column 6 that penetrates the base 1 is the third pipe, that is, the second through hole 12 is used to provide space for the support column 6 to penetrate. At this time, the exhaust pipe 4 only needs to be designed as a two-section pipe structure, that is, an L-shaped structure, that is, the first pipe 41 and the second pipe 42 that are connected to each other.

[0042] Preferably, such as Figure 2 As shown, the clamping device also includes a lifting assembly, which is installed on the support column 6 at the end away from the end connected to the exhaust pipe 4, i.e., the end connected to the second pipe 42. The lifting assembly includes a cover plate 7 installed on the support column 6 at the end away from the end connected to the exhaust pipe 4, and a lifting ring 8 threadedly connected to the cover plate 7. The lifting ring 8 is located at the end of the cover plate 7 away from the support column 6. By setting up the lifting ring, it is convenient to move the clamping device, which has a semi-enclosed sleeve fixedly installed for heat treatment, during the heat treatment process, thereby improving the efficiency of heat treatment.

[0043] Preferably, such as Figure 2As shown, the base 1 is also equipped with a positioning base plate 2, which is arranged at an angle on the base 1 to ensure that the cylinder 102 of the semi-enclosed sleeve 100 to be assembled on the base 1 is in a vertical state. In fact, in various specifications of semi-enclosed sleeves 100, the central axis of the flange 101 forms a certain angle with the central axis of the cylinder 102. To ensure that the cylinder 102 remains vertical during heat treatment, i.e., the central axis of the cylinder 102 is always perpendicular to the horizontal plane, the installation angle of the flange 101 needs to be adjusted. This is achieved by designing the mounting surface of the positioning base plate 2 to match the outer contour dimensions of the flange 101's end face, thus ensuring that the cylinder 102 of the semi-enclosed sleeve 100 to be assembled on the base 1 is in a vertical state. Specifically, the positioning base plate 2 is provided with a wheel for assembling the flange 101 and for aligning with the outer contour dimensions of the flange 101. The first groove 21 is adapted to the profile. The base 1 is provided with a first through hole 11 for the exhaust pipe 4 to pass through and a second through hole 12 for installing the support column 6. The positioning base plate 2 is provided with a third through hole 22 for the exhaust pipe 4 to pass through. The first through hole 11 and the third through hole 22 are both located below the central through hole (i.e., the hole area where the axis of the flange 101 is located) of the flange 101 mounted on the positioning base plate 2. The third through hole 22 is located between the first through hole 11 and the central through hole of the flange 101. By designing the first groove 21 to match the outer contour size of the end face of the flange 101, it can be ensured that the cylinder 102 of the semi-enclosed sleeve 100 is always in a vertical state after assembly.

[0044] Preferably, such as Figure 2 As shown, it also includes a pressure plate 3, which is preferably fork-shaped. It is fixedly installed on the positioning base plate 2 and cooperates with the positioning base plate 2 to fix the flange 101 of the semi-enclosed sleeve 100 on the positioning base plate 2. The pressure plate 3 is provided with a second groove 31 that matches the outer contour of the flange 101. The first groove 21 and the second groove 31 cooperate to clamp the two sides of the flange 101.

[0045] Preferably, such as Figure 2 As shown, each exhaust pipe 4 is equipped with a sleeve 5. The maximum vertical distance from the end of the sleeve 5 away from the corresponding exhaust pipe 4 to the bottom surface of the inner wall of the corresponding cylinder 102 is h1, where 10mm ≤ h1 ≤ 20mm. The minimum vertical distance from each exhaust hole 9 to the bottom surface of all cylinders 102 is h2, where h2 ≥ 30mm. A support leg 10 is provided on the end of the base 1 away from the exhaust hole 9, and each support leg 10 is evenly distributed on the base 1 along the axis of the load-bearing column 6. Figure 2 As shown, the inner bottom surface refers to the end face located inside the cylinder 102 and away from the flange 101, and the outer bottom surface refers to the end face located outside the cylinder 102 and away from the flange 101.

[0046] Figure 3 This is a schematic flowchart of the heat treatment method of the present invention, as shown below. Figure 3 As shown, the present invention also provides a heat treatment method for heat treating the semi-enclosed sleeve 100 clamped on the clamping device, the steps of which include:

[0047] S110: Clean the clamping device; clean the clamping device thoroughly, especially the inside of the first groove 21 of the positioning base plate 2. At the same time, open the drain port at the bottom of the exhaust pipe 4 to drain the residual water left in the exhaust pipe 4 and the support column 6 from the previous heat treatment. Then close the drain port to ensure unobstructed airflow at both ends of the exhaust pipe 4 and the support column 6. The drain port can be automatically controlled by a solenoid valve, manually controlled by a valve, or manually opened and closed by a threaded cap.

[0048] S120: The semi-enclosed sleeve 100 is fixedly installed on the clamping device; the semi-enclosed sleeve 100 is a cable expansion sleeve made of 6061 aluminum alloy. After the end face of the flange 101 of the corresponding semi-enclosed sleeve 100 is placed in the first groove 21 of the positioning base plate 2, the fork-shaped pressure plate 3 is installed so that the second groove 31 on the pressure plate 3 cooperates with the first groove 21 to fix the flange 101 on the positioning base plate 2. The assembly and fixing before heat treatment is completed by fasteners (such as bolts, screws or clamps). Of course, according to the number of positioning base plates 2, the corresponding number of semi-enclosed sleeves 100 can be assembled at one time.

[0049] S130: Hoist the clamping device from step S120 to the solution heat treatment furnace to complete the solution heat treatment; assemble the hook of the hoisting equipment with the lifting ring 8 at the top of the support column 6, move the clamping device with the semi-enclosed sleeve 100 to be heat treated fixedly installed to the solution heat treatment furnace, and complete the solution heat treatment according to the corresponding requirements of the heat treatment process in the prior art, wherein the relevant parameters in the heat treatment process include a solution temperature of 530℃±5℃ and a solution time of 50min±5min.

[0050] S140: After the solution heat treatment is completed, the clamping device is removed from the solution heat treatment furnace and quickly placed into the water quenching tank to complete the water quenching treatment; the clamping device is quickly removed from the solution heat treatment furnace using the same hoisting equipment, and the water quenching treatment of the semi-enclosed sleeve 100 is quickly completed. Specifically, the semi-enclosed sleeve 100 must be removed from the solution heat treatment furnace and placed into the water quenching tank within 15 seconds.

[0051] S150: Remove the clamping device after water quenching from the water quenching tank, and remove the semi-enclosed sleeve 100 from the clamping device. Detect and correct the deformation of the flange 101 end face. Slowly remove the clamping device after water quenching from the water quenching tank using hoisting equipment. Then, remove the pressure plate 3, remove the semi-enclosed sleeve 100 after water quenching from the clamping device, and then detect and correct the deformation of the flange end face.

[0052] S160: The semi-enclosed sleeve 100 from step S150 is placed in an aging heat treatment furnace to complete the aging treatment, resulting in a semi-enclosed sleeve 100 that meets the requirements. The relevant parameters for this aging treatment include an aging temperature of 165℃±5℃ and an aging time of 8h±10min. Figure 1 As shown, the semi-enclosed sleeve 100 that meets the requirements includes that the manufacturing tolerances of the diameters Ф1 and Ф2 after water quenching can be controlled within ±0.5mm, the manufacturing tolerance of the height H of the semi-enclosed sleeve 100 can be controlled within ±0.5mm, the flatness of the end face of the flange 101 is ≤0.15mm, and the geometric dimensional accuracy of the semi-enclosed sleeve 100 is basically the same as that after water quenching with a measurement error not exceeding ±0.1mm. This achieves good control of heat treatment deformation, greatly improves the manufacturing accuracy of heat treatment, and significantly reduces the difficulty of shaping the semi-enclosed sleeve after water quenching.

[0053] It should be noted that the various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. The present invention is not limited to the specific steps and structures described above and shown in the figures. Furthermore, for the sake of brevity, detailed descriptions of known methods and techniques are omitted here.

[0054] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art without departing from the scope of the invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims of this application.

Claims

1. A clamping device for clamping a semi-closed sleeve (100) to be heat treated, said semi-closed sleeve (100) comprising a barrel (102) and a flange (101) welded to said barrel (102), characterized in that, The utility model relates to a half-enclosed sleeve heat treatment device, including: Base (1) for fixed installation half-enclosed sleeve (100); Exhaust component, install on base (1) and part in the cylinder (102) after base (1) and half-enclosed sleeve (100) assembly, for when carrying out heat treatment to half-enclosed sleeve (100) exhaust air in cylinder (102) to the outside of cylinder (102); Exhaust component includes the force column (6) of installation on base (1) and at least two exhaust pipes (4) with force column (6) connection, each exhaust pipe (4) other end all stretches into the cylinder (102) of half-enclosed sleeve (100) assembly on base (1), and the other end of force column (6) is provided with at least two exhaust holes (9) and is internally provided with airflow channel (61) of force column (6), and exhaust pipe (4) all pass through airflow channel (61) and each exhaust hole (9) communication; Base (1) still installs the positioning bottom plate (2), and the positioning bottom plate (2) is arranged on base (1) in inclined state, and the first recess (21) for assembling flange plate (101) and with the outside contour of flange plate (101) is adapted is equipped on the positioning bottom plate (2), and the first through hole (11) for exhaust pipe (4) is penetrated and the second through hole (12) for installing force column (6) are equipped on base (1), and the third through hole (22) for exhaust pipe (4) is penetrated is equipped on the positioning bottom plate (2), and the first through hole (11) and the third through hole (22) are all located below the center through hole position at flange plate (101) assembly on the positioning bottom plate (2), and the third through hole (22) is located between the first through hole (11) and the center through hole of flange plate (101), by being designed into the mounting surface on the positioning bottom plate and the end face outside contour size of flange plate adaptation, so that the cylinder of half-enclosed sleeve to be assembled on base is in vertical state, that is, the central axis of cylinder always is perpendicular to horizontal plane; Each exhaust pipe (4) is installed with sleeve pipe (5), and the maximum vertical distance of the end of sleeve pipe (5) away from exhaust pipe (4) from the inner wall bottom surface of cylinder (102) is h1, and 10mm <= h1 <= 20mm, and the minimum vertical distance of each exhaust hole (9) from the outside bottom surface of cylinder (102) is h2, and h2 >= 30mm.

2. The clamping device of claim 1, wherein The sum of the cross-sectional areas of the hollow passages of each exhaust pipe (4) is less than or equal to the cross-sectional area of the airflow channel (61) of the force column (6), and the cross-sectional area of the airflow channel (61) of the force column (6) is less than or equal to the sum of the areas of each exhaust hole (9).

3. The clamping device of claim 1, wherein Each exhaust pipe (4) penetrates the base (1), and the end of each exhaust pipe (4) connected to the force column (6) is located on the same side of the base (1).

4. The clamping device of claim 3, wherein The force bearing column (6) penetrates the base (1), and the connecting end of the force bearing column (6) with each exhaust pipe (4) is located on the side of the base (1) away from the exhaust hole (9).

5. The clamping device of claim 1, wherein The clamping device further comprises a hoisting assembly installed on the force bearing column (6) away from the connecting end with the exhaust pipe (4), the hoisting assembly comprising a cover plate (7) installed on the force bearing column (6) away from the connecting end with the exhaust pipe (4) and a lifting ring (8) threadedly connected with the cover plate (7), the lifting ring (8) being located on the end of the cover plate (7) away from the force bearing column (6).

6. The clamping device of claim 1, wherein Further comprising a pressing plate (3) fixedly installed on the positioning base plate (2) and cooperating with the positioning base plate (2) to fix the flange plate (101) of the semi-closed sleeve (100) on the positioning base plate (2), the pressing plate (3) being provided with a second groove (31) matched with the outer contour of the flange plate (101), the first groove (21) and the second groove (31) cooperating to clamp both sides of the flange plate (101).

7. The clamping device of claim 1, wherein The base (1) is provided with a supporting leg (10) on the end thereof away from the exhaust hole (9), the supporting leg (10) being uniformly distributed on the base (1) along the axis of the force bearing column (6).

8. A heat treatment method characterized by, A method for heat treating the semi-closed sleeve (100) clamped on the clamping device according to any one of claims 1-7, comprising: S110: cleaning the clamping device; S120: fixedly installing the semi-closed sleeve (100) on the clamping device; S130: hoisting the clamping device of step S120 to a solid solution heat treatment furnace to complete solid solution heat treatment; S140: removing the clamping device after completing solid solution heat treatment from the solid solution heat treatment furnace and quickly entering a water quenching tank to complete water quenching treatment; S150: taking out the clamping device after completing water quenching treatment from the water quenching tank, and taking out the semi-closed sleeve (100) from the clamping device, detecting the deformation amount of the end face of the flange plate (101) and correcting the shape; S160: placing the semi-closed sleeve (100) of step S150 into an aging heat treatment furnace to complete aging treatment, thereby obtaining the semi-closed sleeve (100) meeting the requirements.

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