A slide rail sleeve heat treatment clamping device and method

Abstract

The present application relates to the technical field of heat treatment, in particular to a sliding rail sleeve heat treatment clamping device and method. It comprises a support base, a wedge-shaped base, a fork-shaped pressing plate and a lifting support column, one end of the lifting support column is fixedly connected with the central area of the support base, the fork-shaped pressing plate is installed in cooperation with the wedge-shaped base to clamp the flange end of the sliding rail sleeve; a plurality of wedge-shaped bases are radially arranged at the peripheral positions of the support base with the lifting support column as the axis. The purpose of the sliding rail sleeve heat treatment clamping device and method is to solve the problem that the water quenching effect of the tail of the sleeve is poor due to the existence of air / steam retention in the traditional sleeve heat treatment process.

Description

Technical Field

[0001] This invention relates to the field of heat treatment technology, and specifically to a heat treatment clamping device and method for slide rail sleeves. Background Technology

[0002] The primary function of a slide rail sleeve is to provide movement space for the slide rail within the aircraft wing fuel tank. Therefore, it is often a thin-walled, shell-shaped, cantilever beam structure. Its central axis aligns with the slide rail's trajectory and is arc-shaped, hence the name "arc-axis curved surface sleeve." Slide rail sleeve structures are often serialized, with the external dimensions of each specification limited by its installation position, resulting in certain differences. One typical structural form of a slide rail sleeve is... Figure 1 As shown, the cylinder diameter Ф ranges from 100mm to 300mm, the part wall thickness ranges from 2mm to 6mm, the central axis of the sleeve is a spatial arc, the radius R of the arc axis ranges from 500mm to 2000mm, and the length H of the sleeve ranges from 400mm to 700mm. The Ф, R, and H of each sleeve specification are slightly different, therefore the versatility of this series of sleeves is relatively poor. The drain nozzle 4 of the drain pipe connector 3 has a through hole in the middle to promptly drain condensate generated during flight from the inner cavity of the sleeve.

[0003] Considering that the sleeve structure experiences minimal load during aircraft service and only requires a high level of sealing, aluminum alloy is typically used for the slide rail sleeve, and high-energy beam welding is employed to achieve metallurgical connections between its components in order to maximize weight reduction and service reliability. According to the manufacturing process, the slide rail sleeve body is welded to the drain pipe joint and flange to form an integral structure. After welding, the entire slide rail sleeve structure undergoes solution aging heat treatment to meet strength requirements.

[0004] Solution aging heat treatment typically requires a clamping device to fix the slide rail sleeve in place, enabling rapid removal from the furnace and immersion in water. Currently, in the water quenching process, the slide rail sleeve is generally required to be removed from the furnace and immersed in water within 15 seconds, resulting in a very fast immersion speed. Under normal circumstances, the sleeve's flange faces upwards during the water quenching process. During this process, very little water enters the slide rail sleeve through the through-hole in the drain nozzle, creating a cavity inside the sleeve. Once the flange end face is submerged, water directly flows into the slide rail sleeve. During this water quenching process, the cavity inside the slide rail sleeve creates significant buoyancy. Under the rigid constraint of the flange end face installation, this buoyancy not only causes deformation of the slide rail sleeve's central axis radius R, but also warps the flange end face, leading to larger manufacturing tolerances in H. Simultaneously, the rapid water quenching process generates intense water flow vibration, impacting both R and the cylinder diameter Φ, resulting in significant deformation. To effectively mitigate the impact of buoyancy and water flow vibration on the deformation of the slide rail surface, patent application number 201911052057.5 proposes a method where the sleeve's flange faces downwards during the water quenching process. Air escapes rapidly from the sleeve's inner cavity through the through-hole in the center of the drain nozzle, reducing buoyancy and water flow vibration generated during quenching. This weakens the impact of buoyancy and water flow vibration on the deformation of the slide rail sleeve's central axis radius and diameter, achieving a significant improvement. However, when the high-temperature sleeve parts transferred from the solution furnace are immersed in water with the flange facing downwards, the water and parts come into contact, causing intense vaporization. High-temperature steam can escape from the sleeve's inner cavity through the through-hole in the center of the drain nozzle. However, the rapidly generated steam does not have sufficient time to escape through the through-hole until the sleeve is completely submerged. Even at the top of the sleeve's inner cavity, some air / steam remains trapped, resulting in a less effective water quenching at the sleeve's tail end.

[0005] Therefore, the inventors have provided a heat treatment clamping device and method for slide rail sleeves. Summary of the Invention

[0006] (1) Technical problems to be solved

[0007] This invention provides a sliding rail sleeve heat treatment clamping device and method, which solves the technical problem that the water quenching effect at the tail of the sleeve is poor due to the presence of air / steam retention in the traditional sleeve heat treatment process.

[0008] (2) Technical solution

[0009] A first aspect of the present invention provides a heat treatment clamping device for a slide rail sleeve, comprising a support base, a wedge-shaped base, a fork-shaped pressure plate, and a lifting support column. One end of the lifting support column is fixedly connected to the central region of the support base. The fork-shaped pressure plate is fitted with the wedge-shaped base to clamp the flange end of the slide rail sleeve. A plurality of the wedge-shaped bases are radially arranged around the support base with the lifting support column as the axis.

[0010] Furthermore, the top surface of the wedge-shaped base is provided with a mounting groove that matches the outer dimensions of the flange end face of the corresponding slide rail sleeve.

[0011] Furthermore, the wedge angle of the wedge-shaped base ranges from 10° to 30°.

[0012] Furthermore, the support base and the wedge-shaped base are provided with through holes at the corresponding openings of the sleeve cavity.

[0013] Furthermore, one end of the hoisting support is a flange end, which is fixedly connected to the central area of ​​the support base by fasteners.

[0014] Furthermore, the number N of the wedge-shaped bases is an even number, and N≥2.

[0015] Furthermore, the slide rail sleeve heat treatment clamping device also includes a lifting ring, and the other end of the lifting support is threadedly connected to the lifting ring.

[0016] A second aspect of the present invention provides a heat treatment method using the above-described slide rail sleeve heat treatment clamping device, comprising the following steps:

[0017] Move the heat treatment clamping device to the solution heat treatment furnace and complete the solution heat treatment according to the corresponding requirements;

[0018] Remove the heat treatment clamping device from the solution heat treatment furnace and quickly complete the water quenching treatment of the slide rail sleeve;

[0019] Remove the fork-shaped pressure plate, take the slide rail sleeve out of the heat treatment clamping device and put it into the aging heat treatment furnace to complete the aging treatment.

[0020] Furthermore, the step of removing the heat treatment clamping device from the solution heat treatment furnace and quickly completing the water quenching treatment of the slide rail sleeve specifically includes the following steps:

[0021] After solution treatment is completed, the furnace door of the solution heat treatment furnace is opened, and the heat treatment clamping device drives the slide rail sleeve to move downward at a speed of 0 m / min at time t0.

[0022] The heat treatment clamping device causes the slide rail sleeve to move downward rapidly and continuously to v1 within time t1, and maintains the speed v1 until time t2, at which time the bottom of the slide rail sleeve is in contact with the water surface of the water quenching tank.

[0023] Driven by the hoisting equipment, the heat treatment fixture causes the slide rail sleeve to move downward at a continuously decreasing speed. At time t3, the movement speed decreases to v2, at which point the top of the slide rail sleeve is completely submerged in water.

[0024] Continue to reduce the downward movement speed of the slide rail sleeve. At time t4, the movement speed drops to 0 m / min.

[0025] After the slide rail sleeve has cooled sufficiently, slowly remove the heat treatment clamping device from the water quenching tank.

[0026] Furthermore, the time interval t2 to t3 is greater than or equal to half of the time interval 0 to t4.

[0027] (3) Beneficial effects

[0028] In summary, this invention achieves a better water quenching effect by changing the orientation of the drain nozzle in the installation state of the slide rail sleeve and optimizing the speed control after the slide rail sleeve comes into contact with water during water quenching. This allows the air / water vapor inside the slide rail sleeve to escape more easily from the inner cavity of the slide rail sleeve through the through hole in the middle of the drain nozzle. Attached Figure Description

[0029] 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.

[0030] Figure 1 This is a schematic diagram of a typical slide rail sleeve.

[0031] Figure 2 This is a schematic diagram of the structure of a slide rail sleeve heat treatment clamping device provided in an embodiment of the present invention;

[0032] Figure 3 This is a top view of a slide rail sleeve heat treatment clamping device provided in an embodiment of the present invention;

[0033] Figure 4 This is a partial left view of a slide rail sleeve heat treatment clamping device provided in an embodiment of the present invention;

[0034] Figure 5 This is a schematic flowchart of a heat treatment method for a slide rail sleeve provided in an embodiment of the present invention;

[0035] Figure 6 This is a schematic diagram of the water quenching process of a slide rail sleeve heat treatment method provided in an embodiment of the present invention.

[0036] In the picture:

[0037] 1-Support base; 2-Wedge-shaped base; 3-Fork-shaped pressure plate; 4-Lifting support column; 41-Flange end; 5-Lifting ring; 6-Outrigger; 100-Slide rail sleeve. Detailed Implementation

[0038] 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.

[0039] 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.

[0040] In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this invention and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0041] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "install" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0042] Figure 2 This is a schematic diagram of the structure of a slide rail sleeve heat treatment clamping device provided in an embodiment of the present invention, as shown below. Figure 2As shown, the clamping device may include a support base 1, a wedge-shaped base 2, a fork-shaped pressure plate 3, and a lifting column 4. One end of the lifting column 4 is fixedly connected to the central area of ​​the support base 1. The fork-shaped pressure plate 3 is installed in conjunction with the wedge-shaped base 2 to clamp the flange end of the slide rail sleeve 100. Multiple wedge-shaped bases 2 are radially arranged around the support base 1 with the lifting column 4 as the axis.

[0043] In the above embodiment, by changing the orientation of the drain nozzles in the installation state of the slide rail sleeve to be arranged counterclockwise, during the rapid downward water quenching process of the sleeve, the motion mechanism drives the clamping device and causes the sleeve parts to form counterclockwise airflow and counterclockwise water flow. Under the action of the negative pressure turbine principle, the drain nozzles in the negative pressure state are more conducive to the rapid escape of air or steam from the inner cavity of the sleeve, and can also further reduce the air resistance and water resistance of the sleeve, thereby obtaining a better water quenching effect.

[0044] As an optional implementation, the top surface of the wedge-shaped base 2 is provided with a mounting groove that matches the outer dimensions of the flange end face of the corresponding slide rail sleeve.

[0045] As an optional implementation method, such as Figure 3 As shown, the wedge angle of the wedge-shaped base 2 ranges from 10° to 30°. This angle is designed to accommodate water quenching of the sleeve in a roughly vertical position.

[0046] As an optional implementation method, such as Figure 2 As shown, the support base 1 and the wedge-shaped base 2 have through holes at the corresponding openings of the sleeve's inner cavity. The bottom of the support base 1 has multiple legs 6 for supporting the entire clamping device.

[0047] As an optional implementation, one end of the lifting support 4 is a flange end 41, which is fixedly connected to the central area of ​​the support base 1 by fasteners. The flange end 41 facilitates the installation connection between the lifting support 4 and the support base 1.

[0048] As an optional implementation, the number N of wedge-shaped bases 2 is even, and N≥2. The even number is chosen to facilitate symmetrical weight distribution.

[0049] As an optional implementation method, such as Figure 4 As shown, the slide rail sleeve heat treatment clamping device also includes a lifting ring 5, and the other end of the lifting support 4 is threadedly connected to the lifting ring 5. Specifically, the lifting ring 5 is used to quickly connect the clamping device to the lifting equipment to facilitate the transfer of the clamping device.

[0050] Figure 5 This is a schematic flowchart of a heat treatment method using the above-mentioned slide rail sleeve heat treatment clamping device provided in an embodiment of the present invention, as shown below. Figure 5As shown, the method may include the following steps:

[0051] S100. Move the heat treatment clamping device to the solution heat treatment furnace and complete the solution heat treatment according to the corresponding requirements.

[0052] S200. Remove the heat treatment clamping device from the solution heat treatment furnace and quickly complete the water quenching treatment of the slide rail sleeve 100.

[0053] S300. Remove the fork-shaped pressure plate 3, take the slide rail sleeve 100 out of the heat treatment clamping device and put it into the aging heat treatment furnace to complete the aging treatment.

[0054] In the above embodiment, before step S100, the heat treatment clamping device is cleaned, especially the inside of the mounting groove of the wedge-shaped base 2. After placing the flange end face of the corresponding slide rail sleeve in the mounting groove, the fork-shaped pressure plate 3 is installed, and the slide rail sleeve is assembled and fixed before heat treatment using fasteners. The assembly and fixing described above only applies to the flange end face of the slide rail sleeve. After assembly, the drain nozzles of the four slide rail sleeves are arranged counterclockwise with the lifting support 4 as the axis.

[0055] In step S300, the shape of the flange end face is inspected. If it is found that the flatness requirement is not met, manual straightening is required.

[0056] As an optional implementation, in step S200, the heat treatment clamping device is removed from the solution heat treatment furnace, and the slide rail sleeve 100 is quickly subjected to water quenching treatment, such as... Figure 6 As shown, the specific steps include the following:

[0057] S201. After solution treatment is completed, open the furnace door of the solution heat treatment furnace. The heat treatment clamping device drives the slide rail sleeve 100, and the downward movement speed at time t0 is 0m / min.

[0058] S202. The downward movement speed of the slide rail sleeve 100 driven by the heat treatment clamping device is rapidly and continuously increased to v1 within time t1, and the speed v1 is maintained until time t2, at which time the bottom of the slide rail sleeve 100 is in contact with the water surface of the water quenching tank.

[0059] S203. Under the driving action of the hoisting equipment, the heat treatment fixture drives the slide rail sleeve 100 to move downward at a continuously decreasing speed. At time t3, the movement speed decreases to v2, at which point the top of the slide rail sleeve 100 is completely submerged in water.

[0060] S204. Continue to reduce the downward movement speed of the slide rail sleeve 100. At time t4, the movement speed drops to 0 m / min.

[0061] S205. After the slide rail sleeve 100 has cooled sufficiently, slowly remove the heat treatment clamping device from the water quenching tank.

[0062] In the above embodiment, by optimizing the control of the reduced velocity of the sleeve after contact with water, more time is provided for water vapor inside the sleeve to escape when the sleeve drain nozzle is above the water surface. The rotating vortex of water and air increases the heat exchange rate between the sleeve and water, promoting uniform cooling and accelerating heat dissipation. Simultaneously, the full contact between the inner and outer walls of the sleeve and the cooling water achieves a better water quenching effect. Furthermore, the gradually decreasing water immersion velocity further mitigates the impact of water flow vibration on the sleeve's dimensions, especially its diameter Φ and the radius R of the arc axis.

[0063] In step S203, the air inside the sleeve cavity can quickly escape through the through hole in the middle of the drain nozzle. However, as the depth of the high-temperature slide sleeve immersed in the water gradually increases, the area of ​​vaporization between the sleeve wall and the water also gradually increases. That is, the area of ​​the high-temperature gas film generated by the contact between the sleeve wall and the water increases rapidly. Under the rapid expansion of the high-temperature gas film, the volume of water vapor also increases rapidly, resulting in a limited amount of water vapor discharged from the sleeve through the drain nozzle. After the sleeve comes into contact with the water surface and the drain nozzle is above the water surface, the gradual decrease in the immersion speed of the sleeve provides sufficient time for the water vapor inside the sleeve to escape. On the other hand, it also increases the heat exchange rate between the sleeve and the water through the rotating vortex of water and air, promoting uniform cooling of the sleeve and accelerating heat dissipation. At the same time, the full contact between the inner and outer walls of the sleeve and the cooling water enables the sleeve to achieve a better water quenching effect. In addition, the gradually slowing immersion speed can further mitigate the impact of water flow vibration on the sleeve's external dimensions, especially on the sleeve's R and Φ. The speed at which the heat treatment clamping device drives the part downward for water quenching includes linear deceleration and nonlinear deceleration. Nonlinear deceleration includes parabolic deceleration.

[0064] The time interval from 0 to t4 should not exceed the water quenching completion time required by the relevant standards, and it is best to be less than or equal to 15 seconds; the time interval from t1 to t2 can be as short as possible, and the time interval from t2 to t3 should be greater than or equal to half of the time interval from 0 to t4.

[0065] Example 1

[0066] The number of wedge-shaped bases 2 is N=4, and the wedge angle α of the wedge-shaped bases 2 is approximately 20°. At this angle, the length direction of the slide rail sleeve is basically vertically downward. After the slide rail sleeve is installed, the drain nozzles of the slide rail sleeve are arranged counterclockwise with the hoisting support 4 as the axis. The heat treatment regime adopted is consistent with the existing technology, namely, solution temperature 530℃±5℃, solution time 50min±5min, and the slide rail sleeve is immersed in water within 15s from being taken out of the furnace; aging temperature 165℃±5℃, aging time 8h±10min. However, in the water quenching process of the above heat treatment, by changing the downward water quenching speed of the slide rail sleeve, more time is provided for the water vapor inside the sleeve to escape, so that the sleeve can achieve better control of heat treatment performance.

[0067] Verification has shown that the tensile strength of the bottom portion of the cylinder near the drain nozzle after solution aging heat treatment can be increased by approximately 20% to 30% compared to existing technologies. Simultaneously, the gradually decreasing water quenching immersion rate further mitigates the impact of water flow vibration on the dimensions of the slide rail sleeve. Verification has shown that, compared to existing technologies, the deformation of the slide rail sleeve's diameter Φ and the radius R of the arc axis is further reduced, by approximately 5% to 10%.

[0068] 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.

[0069] The above are merely embodiments of this application and are 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 slide rail sleeve heat treatment clamping device, characterized in that, It includes a support base (1), a wedge-shaped base (2), a fork-shaped pressure plate (3) and a lifting column (4). One end of the lifting column (4) is fixedly connected to the central area of ​​the support base (1). The fork-shaped pressure plate (3) is installed in conjunction with the wedge-shaped base (2) to clamp the flange end of the slide rail sleeve (100). Multiple wedge-shaped bases (2) are radially arranged around the periphery of the support base (1) with the hoisting column (4) as the axis; The drain nozzles of the slide rail sleeve (100) are arranged counterclockwise in the installed state, and the motion mechanism drives the clamping device to drive the slide rail sleeve (100) to form counterclockwise airflow and counterclockwise water flow.

2. The slide channel heat treatment clamping device of claim 1, wherein, The top surface of the wedge-shaped base (2) is provided with an installation groove that matches the outer dimensions of the flange end face of the corresponding slide rail sleeve.

3. The slide channel heat treatment clamping device of claim 1, wherein, The wedge angle of the wedge base (2) ranges from 10° to 30°.

4. The slide channel heat treatment clamping device of claim 1, wherein, The support base (1) and the wedge-shaped base (2) have through holes at the corresponding openings of the sleeve cavity.

5. The slide channel heat treatment clamping device of claim 1, wherein, One end of the hoisting support (4) is a flange end (41), which is fixedly connected to the central area of ​​the support base (1) by fasteners.

6. The slide rail sleeve heat treatment clamping device according to claim 1, characterized in that, The number N of the wedge-shaped bases (2) is even, and N≥2.

7. The slide rail sleeve heat treatment clamping device according to any one of claims 1-6, characterized in that, It also includes a lifting ring (5), the other end of which is threadedly connected to the lifting ring (5).

8. A heat treatment method using the slide rail sleeve heat treatment clamping device according to any one of claims 1-7, characterized in that, The method includes the following steps: Move the heat treatment clamping device to the solution heat treatment furnace and complete the solution heat treatment according to the corresponding requirements; Remove the heat treatment clamping device from the solution heat treatment furnace and quickly complete the water quenching treatment of the slide rail sleeve (100); Remove the fork-shaped pressure plate (3), take the slide rail sleeve (100) out of the heat treatment clamping device and put it into the aging heat treatment furnace to complete the aging treatment.

9. The heat treatment method according to claim 8, characterized in that, The step of removing the heat treatment clamping device from the solution heat treatment furnace and quickly completing the water quenching treatment of the slide rail sleeve (100) specifically includes the following steps: After solution treatment is completed, the furnace door of the solution heat treatment furnace is opened, and the heat treatment clamping device drives the slide rail sleeve (100) to move downward at a speed of 0 m / min at time t0. The heat treatment clamping device causes the slide rail sleeve (100) to move downward rapidly and continuously to v1 within time t1, and maintains the speed v1 until time t2, at which time the bottom of the slide rail sleeve (100) is in contact with the water surface of the water quenching tank. Driven by the hoisting equipment, the heat treatment fixture causes the slide rail sleeve (100) to move downward at a continuously decreasing speed. At time t3, the movement speed decreases to v2, at which point the top of the slide rail sleeve (100) is completely submerged in water. Continue to reduce the downward movement speed of the slide sleeve (100), and at time t4, the movement speed drops to 0 m / min; After the slide rail sleeve (100) has cooled sufficiently, slowly remove the heat treatment clamping device from the water quenching tank.

10. The heat treatment method according to claim 9, characterized in that, The time interval t2 to t3 is greater than or equal to half of the time interval 0 to t4.

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