A heat treatment tool for preventing quenching warping deformation of a high-temperature titanium alloy air inlet casing

Abstract

The utility model belongs to material heat treatment control type control sex field discloses a kind of heat treatment tooling for preventing high-temperature titanium alloy air intake cowl quenching warping deformation, including air intake cowl body and anti-deformation support frame, anti-deformation support frame includes inner support platform, upper support, lower support and support rod, inner support platform is installed in air intake cowl body inner side, and inner support platform top and bottom are equipped with the connecting rod of coaxial arrangement, upper support and lower support are respectively installed on the connecting rod above and below inner support platform, and the ring surface of upper support and lower support is uniformly processed with the multiple insertion slot of consistent quantity, and the insertion slot on upper support and lower support is respectively installed with support rod, and clamping recess is processed on support rod, and the support rod on upper support and lower support is connected by iron chain along the radial direction of air intake cowl body.The utility model can gradually apply uniform compacting force to air intake cowl from inside to outside by setting anti-deformation support frame, and can reduce the problem of warping deformation of air intake cowl due to uneven temperature field in quenching process.

Description

Technical Field

[0001] This utility model belongs to the field of material heat treatment shape and property control, specifically relating to a heat treatment fixture for preventing high-temperature titanium alloy intake casing from warping and deforming during quenching. Background Technology

[0002] High-temperature titanium alloy intake casings are a critical component of the hot-end parts of aero-engines, and their performance directly affects the engine's thrust-to-weight ratio, reliability, and service life. As aero-engine performance continues to improve, higher demands are placed on the intake casing's high-temperature resistance, creep resistance, and fatigue resistance. To meet these requirements, near-net-shape forming processes, such as precision casting and isothermal forging, are employed in the manufacturing of intake casings. However, these forming processes inevitably introduce residual stresses, which can lead to warping deformation during subsequent heat treatment, thus affecting the intake casing's precision and service performance.

[0003] The main reasons for intake casing warping are: the complex shape of the intake casing easily leads to an uneven temperature field during heat treatment, such as differences in the dimensions of thin walls, fairing plates, and support rings. The varying wall thicknesses in different areas result in different cooling rates during quenching, with thin-walled areas cooling faster and thicker areas cooling slower. The uneven stress field is primarily caused by the different thermal expansion and contraction resulting from the uneven temperature field.

[0004] At high temperatures, titanium alloys exhibit low yield strength and are prone to plastic deformation. As the temperature decreases, the yield strength of titanium alloys gradually increases, while their plastic deformation capacity decreases. During quenching, the intake casing undergoes a transition from plastic deformation to elastic deformation, ultimately resulting in residual stress. The heat treatment process requires rapid cooling of the high-temperature titanium alloy intake casing to room temperature to obtain a supersaturated solid solution. To prevent warping of the titanium alloy intake casing during heat treatment, a set of tooling needs to be designed for the heat treatment process. Utility Model Content

[0005] The purpose of this invention is to solve the problems in the background technology and provide a heat treatment fixture to prevent warping deformation of high-temperature titanium alloy intake casing during quenching. This fixture can apply a uniform supporting force to the intake casing and prevent warping deformation.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A heat treatment fixture for preventing warping deformation of a high-temperature titanium alloy intake casing during quenching includes an intake casing body and an anti-deformation support for clamping the intake casing body. The intake casing body includes an inner ring, an outer ring, and fairing plates. The inner and outer rings are coaxially arranged, and multiple fairing plates are radiating along the axis and connected between the inner and outer rings. The anti-deformation support includes an inner support platform, an upper support, a lower support, and support rods. The contour of the inner support platform is adapted to the inner diameter of the inner ring. Multiple clearance grooves are machined on the ring surface of the inner support platform. Coaxial connecting rods are provided at the top and bottom of the inner support platform. The upper and lower supports are machined with... The connecting holes mate with the connecting rods. The upper and lower supports are respectively installed on the connecting rods above and below the inner support platform. The upper and lower supports have a number of slots evenly machined on their annular surfaces, and the slots correspond one-to-one. Support rods are installed in the slots on the upper and lower supports respectively. The bottom surface of the support rod installed on the upper support has a clamping groove that is aligned with the top contour of the inner and outer rings. The surface of the support rod installed on the lower support has a clamping groove that is aligned with the bottom contour of the inner and outer rings. The support rods on the upper and lower supports correspond one-to-one along the radial direction of the intake casing body. The support rods that correspond one-to-one on the outer side of the intake casing body are connected by iron chains.

[0008] The cross-sectional dimensions of the strut are 70 mm × 70 mm.

[0009] The clamping groove is machined with a 0-15° bevel at the connection point with the intake casing.

[0010] The connecting rod is threaded, and a nut is also installed on the connecting rod to lock the upper and lower supports.

[0011] The heat treatment fixture provided by this utility model for preventing warping and deformation of high-temperature titanium alloy intake casings during quenching has the following beneficial effects:

[0012] (1) By setting up anti-deformation support, a uniform clamping force can be applied to the intake casing from the inside out, which can reduce the problem of warping deformation of the intake casing due to uneven temperature field during quenching.

[0013] (2) By machining a 0~15° bevel at the connection between the clamping groove and the intake casing, the intake casing can be provided with deformation space for thermal expansion and contraction during the quenching process, thus avoiding stress concentration that could cause the intake casing to crack.

[0014] (3) By setting the plug-in support rod, the support rods installed on the upper support and the lower support have the same shape and high versatility, which can save the time and labor costs of rotating and placing the intake casing, and can effectively improve the installation efficiency of the tooling. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a structural schematic diagram provided for an embodiment of the present utility model.

[0017] Figure 2 A schematic diagram of the structure of the intake casing body provided in an embodiment of this utility model.

[0018] Figure 3 An exploded view of the anti-deformation support provided in an embodiment of this utility model.

[0019] The markings in the diagram are: 1. Intake casing body; 11. Inner ring; 12. Outer ring; 13. Rectifier plate; 2. Anti-deformation support; 21. Inner support platform; 22. Clearance groove; 23. Connecting rod; 24. Upper support; 25. Lower support; 26. Slot; 27. Support rod; 28. Clamping groove; 29. ​​Nut. Detailed Implementation

[0020] like Figure 1 , Figure 2 , Figure 3As shown in the figure, the heat treatment fixture for preventing warping deformation of high-temperature titanium alloy intake casing provided in this embodiment includes an intake casing body 1 and an anti-deformation support 2 for clamping the intake casing body 1. The intake casing body 1 includes an inner ring 11, an outer ring 12, and a fairing plate 13. The inner ring 11 and the outer ring 12 are arranged coaxially. Multiple fairing plates 13 are radiating along the axis and connected between the inner ring 11 and the outer ring 12. The outer ring 12 is cylindrical, and the inner ring 11 is conical. The anti-deformation support 2 includes an inner support platform 21, an upper support 24, a lower support 25, and a support rod 27. The outline of the inner support platform 21 is adapted to the inner diameter of the inner ring 11. Multiple clearance grooves 22 are machined on the ring surface of the inner support platform 21. These clearance grooves 22 ensure support for the inner ring 11 while avoiding excessive contact with it. The cross-section of the inner support platform 21 is polygonal, such as a pentagon or hexagon. Coaxial connecting rods 23 are provided at the top and bottom of the inner support platform 21. Connecting holes for the connecting rods 23 are machined in the middle of the upper support 24 and lower support 25. The upper support 24 and lower support 25 are respectively installed on the connecting rods 23 above and below the inner support platform 21. To facilitate connection of the support base, threads can be machined on the connecting rod 23, and a nut 29 is provided to limit the upper support 24 and the lower support 25. Multiple slots 26 of the same number are uniformly machined on the annular surfaces of the upper support 24 and the lower support 25, and the slots 26 correspond one-to-one. Support rods 27 are respectively installed in the slots 26 on the upper support 24 and the lower support 25. The cross-sectional dimensions of the support rods 27 are 70 mm × 70 mm. The bottom surface of the support rod 27 installed on the upper support 24 has clamping grooves 28 that align with the top contours of the inner ring 11 and the outer ring 12. The support rods 27 installed on the lower support 25... The surface of the strut 27 is machined with clamping grooves 28 that are aligned with the bottom contours of the inner ring 11 and the outer ring 12. The struts 27 on the upper support 24 and the lower support 25 correspond one-to-one with the radial direction of the intake casing body 1. The struts 27 on the outer side of the intake casing body 1 are connected by iron chains. Since the intake casing body 1 will change during quenching, in order to solve this problem, a 0~15° bevel angle is machined at the connection between the clamping groove 28 and the intake casing. The extra size of the bevel angle allows the intake casing to have a certain deformation space, thereby avoiding cracking of the intake casing body 1 caused by stress concentration.

[0021] The method of using this utility model is as follows:

[0022] In use, first insert the corresponding support rod 27 into the slot 26 of the lower support 25, so that the clamping groove 28 on the support rod 27 faces upward. Then, vertically install the inner support platform 21 in the middle of the lower support 25. Next, hoist the intake casing body 1 onto the lower support 25. At this time, the worker adjusts the position of the support rod 27 installed on the lower support 25 so that the clamping groove 28 is aligned with the outline of the inner ring 11 and outer ring 12 at the bottom of the intake casing body 1. Then, install the upper support 24 on the connecting rod 23 above the inner support platform 21. Then, install the corresponding support rod 27 on the slot 26 of the upper support 24, so that the clamping groove 28 of the support rod 27 faces downward. Since the outer ring 12 is frustoconical, the upper support 24 is installed... When installing the upper support rod 27, the tapered part should be installed first, and then the outer ring 12 part should be snapped off. During this process, the end of the support rod 27 near the upper support 24 rotates with the support rod 27 and is inserted into the slot 26. Finally, the nut 29 is screwed on the connecting rod 23, and the corresponding support rods 27 on the upper support 24 and the lower support 25 are fixedly connected by iron chains at the end of the support rod 27. At this time, the support rod 27 clamps the intake casing body 1 under the support of the inner support platform 21, the upper support 24 and the lower support 25 to avoid the warping of the intake casing body 1. At the same time, during the quenching process, the bevel at the clamping groove 28 can provide a certain deformation range to avoid stress concentration in the intake casing body 1, which may lead to cracking.

[0023] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications and substitutions based on the technical solutions and inventive concepts provided by the present invention should be covered within the scope of protection of the present invention.

Claims

1. A heat treatment fixture for preventing warping and deformation of a high-temperature titanium alloy intake casing during quenching, characterized in that: The system includes an intake casing body (1) and a deformation-resistant support (2) for clamping the intake casing body (1). The intake casing body (1) includes an inner ring (11), an outer ring (12), and a fairing plate (13). The inner ring (11) and the outer ring (12) are arranged coaxially. Multiple fairing plates (13) are arranged in a radiating pattern along the axis and connected between the inner ring (11) and the outer ring (12). The deformation-resistant support (2) includes an inner support platform (21). The upper support (24), lower support (25), and strut (27) are provided. The outline of the inner support platform (21) is adapted to the inner diameter of the inner ring (11). Multiple clearance grooves (22) are machined on the ring surface of the inner support platform (21). The top and bottom of the inner support platform (21) are provided with coaxially arranged connecting rods (23). The upper support (24) and lower support (25) are machined with connecting holes that cooperate with the connecting rods (23) in the middle. The upper support (24) and lower support (25) are provided with connecting holes that cooperate with the connecting rods (23). The lower support (25) is installed on the connecting rod (23) above and below the inner support platform (21). The upper support (24) and lower support (25) have a uniform number of slots (26) machined on their annular surfaces, with each slot (26) corresponding to the next. A support rod (27) is installed in each slot (26) on the upper support (24) and lower support (25). The bottom surface of the support rod (27) installed on the upper support (24) is machined with a groove that matches the inner ring (23). 11) A clamping groove (28) aligned with the top contour of the outer ring (12). The support rod (27) mounted on the lower support (25) has a clamping groove (28) aligned with the bottom contour of the inner ring (11) and the outer ring (12). The support rods (27) on the upper support (24) and the lower support (25) correspond one-to-one along the radial direction of the intake casing body (1). The support rods (27) on the outer side of the intake casing body (1) are connected by iron chains.

2. The heat treatment fixture for preventing warping deformation of high-temperature titanium alloy intake casing during quenching according to claim 1, characterized in that: The cross-sectional dimensions of the strut (27) are 70 mm × 70 mm.

3. The heat treatment fixture for preventing warping deformation of high-temperature titanium alloy intake casing during quenching according to claim 1, characterized in that: The clamping groove (28) is machined with a chamfer of 0~15° at the connection between it and the intake casing.

4. The heat treatment fixture for preventing warping deformation of high-temperature titanium alloy intake casing during quenching according to claim 1, characterized in that: The connecting rod (23) is threaded, and a nut (29) is installed on the connecting rod (23) to lock the upper support (24) and the lower support (25).

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