A kind of tool for correcting special-shaped curved thin-wall castings

Abstract

This utility model belongs to the technical field of casting tools for aerospace equipment, and relates to a tooling for correcting irregularly shaped thin-walled castings. It includes an internal correction tooling and an external correction tooling. The internal correction tooling is designed to conform to the internal cavity shape of the irregularly shaped thin-walled casting and includes a first support plate, a second support plate, and a third support plate, with the second support plate positioned between the first and third support plates. The external correction tooling includes two sets of clamping plates arranged in pairs. Each set of clamping plates has a screw threaded through both ends, and the two ends of the screw are threaded with nuts. The two sets of clamping plates are correspondingly positioned on the outer side of the easily deformable parts of the irregularly shaped thin-walled casting, and the clamping surfaces of the clamping plates are designed to conform to the external curved surface shape of the casting. This device has a simple structure and is easy to operate. It is used during solution treatment and aging treatment of castings, thereby reducing casting deformation and significantly improving the casting yield and production efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of casting tools for aviation equipment, specifically, it relates to a tooling for correcting irregular curved thin-walled castings. Background Technology

[0002] In the manufacturing of some aerospace equipment, it is necessary to use such as Figure 3 The irregularly shaped, thin-walled casting shown has an overall wall thickness of 1.5mm and a maximum dimension of 326mm. Its irregular curved surface structure, lack of internal support, and relatively open layout make both the wax model and the casting prone to deformation. This deformation leads to dimensional deviations in the produced castings, resulting in a low yield. Furthermore, during dimensional correction, the shape and dimensions of the curved surface cannot be directly measured, significantly increasing production and inspection difficulties and reducing production efficiency.

[0003] Therefore, there is an urgent need in this field to develop a tooling for correcting irregularly shaped thin-walled castings in order to improve the casting qualification rate and production efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a tooling for correcting irregularly shaped, thin-walled castings, so that it can be used during solution treatment and aging treatment of the castings. The internal cavity of the casting can be supported by the internal tooling, and external correction tooling is added to the outside of the parts of the casting that are prone to deformation, thereby reducing the deformation of the castings and significantly improving the qualification rate and production efficiency of the castings.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A fixture for correcting irregularly shaped thin-walled castings includes an internal correction fixture and an external correction fixture. The internal correction fixture is configured to conform to the internal cavity shape of the irregularly shaped thin-walled casting and includes a first support plate, a second support plate, and a third support plate. The second support plate is located between the first and third support plates. A first fixing plate is located on the right side of the internal correction fixture, and a second fixing plate is located at the bottom. The first, second, and third support plates are detachably connected via the first fixing plate on the right side and the second fixing plate at the bottom. The fixture is integrated into one unit. The first fixing plate is located in the opening on the right side of the irregular curved thin-walled casting, and the second fixing plate is located in the opening at the bottom of the irregular curved thin-walled casting. The external correction fixture includes two sets of clamping plates arranged in pairs. Each set of clamping plates has a screw that slides through both ends, and the two ends of the screw are respectively threaded with nuts. The two sets of clamping plates are correspondingly arranged on the outside of the easily deformable parts of the irregular curved thin-walled casting, and the clamping surface of the clamping plates is set according to the shape of the external curved surface of the irregular curved thin-walled casting.

[0006] Preferably, the gap between the internal correction fixture and the inner wall periphery of the irregular curved thin-walled casting is 0.2 mm.

[0007] Preferably, the thickness of the first fixing plate is 5mm, and the thickness of the second fixing plate is 25mm.

[0008] Preferably, the first fixing plate and the second fixing plate are detachably connected to the internal correction fixture by bolts.

[0009] Preferably, the outer sides of each set of clamps are set as parallel planes.

[0010] The method of using this utility model is as follows: (1) Before solution treatment of casting: First use internal correction fixture: First, put support plate one into one side of the inner cavity of the casting, then put support plate three into the other side of the casting, and finally insert support plate two between support plate one and support plate three. Then, use fixing block one and bolts to connect the right side of support plate one, support plate two and support plate three. Finally, use fixing block two and bolts to connect the bottom of support plate one, support plate two and support plate three.

[0011] Next, external calibration fixtures are used to fix the four clamping plates and the corresponding lead screws to the outside of the easily deformable parts of the casting with nuts. Then, the fixed casting and fixtures are subjected to solution treatment.

[0012] (2) After the solution treatment, the casting is corrected according to the relevant process requirements. After the correction is completed, aging treatment is carried out. Since the wall thickness of the casting is too thin, it is very easy to deform. Therefore, the aging treatment also requires the use of internal and external correction fixtures to repeat the steps before the solution treatment of the casting and fix the corrected casting.

[0013] After aging, the internal cavity and external dimensions of the casting can be well controlled. The local arcs (easily deformable parts) are prone to outward deformation. By fixing them with clamps, the shape of the arcs can be well controlled, so that the dimensions of the casting meet the requirements.

[0014] Compared with the prior art, the utility model has the following beneficial effects: This device has a simple structure and is easy to operate. It is used in the solution treatment and aging treatment of castings to reduce the deformation of castings and greatly improve the qualification rate and production efficiency of castings. Attached Figure Description

[0015] The utility model will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention in use in the embodiment.

[0017] Figure 2 This is a three-dimensional structural schematic diagram from another perspective when the present invention is used in the embodiment.

[0018] Figure 3This is a schematic diagram of the overall structure of the irregular curved surface thin-walled casting in the embodiment.

[0019] In the figure: 1-Irregular curved thin-walled casting, 2-Support plate one, 3-Support plate two, 4-Support plate three, 5-Fixing plate one, 6-Fixing plate two, 7-Clamping plate, 8-Screw. Detailed Implementation

[0020] The utility model will now be clearly described with reference to the accompanying drawings and specific embodiments. This description is merely for explaining the utility model and is not intended to limit it. Any modifications, equivalent substitutions, or improvements made by those skilled in the art based on the embodiments of the utility model without inventive effort to obtain all other embodiments should be included within the protection scope of the utility model.

[0021] Example like Figures 1-3 As shown, this embodiment provides a fixture for correcting irregularly shaped thin-walled castings, including an internal correction fixture and an external correction fixture. The internal correction fixture is configured to conform to the internal cavity shape of the irregularly shaped thin-walled casting 1, and includes a first support plate 2, a second support plate 3, and a third support plate 4. The second support plate is located between the first and third support plates. A first fixing plate 5 is provided on the right side of the internal correction fixture, and a second fixing plate 6 is provided at the bottom. The first, second, and third support plates can be adjusted by the first fixing plate on the right side and the second fixing plate at the bottom. The components are disassembled and connected as one unit. The first fixing plate is located in the opening on the right side of the irregular curved thin-walled casting, and the second fixing plate is located in the opening at the bottom of the irregular curved thin-walled casting. The external correction fixture includes two sets of clamping plates 7 arranged in pairs. Each set of clamping plates has a screw 8 slidably passing through both ends, and the two ends of the screw are respectively threaded with nuts (not shown in the figure). The two sets of clamping plates are correspondingly arranged on the outside of the easily deformable parts of the irregular curved thin-walled casting, and the clamping surface of the clamping plates is set according to the shape of the external curved surface of the irregular curved thin-walled casting.

[0022] In this embodiment, the gap between the internal correction fixture and the inner wall periphery of the irregular curved thin-walled casting is 0.2mm, the thickness of the first fixing plate is 5mm, the thickness of the second fixing plate is 25mm, the first fixing plate and the second fixing plate are detachably connected to the internal correction fixture by bolts, and the outer sides of each set of clamps are set as parallel planes.

[0023] The method of using this utility model is as follows: (1) Before solution treatment of casting: First use internal correction fixture: First, put support plate one into one side of the inner cavity of the casting, then put support plate three into the other side of the casting, and finally insert support plate two between support plate one and support plate three. Then, use fixing block one and bolts to connect the right side of support plate one, support plate two and support plate three. Finally, use fixing block two and bolts to connect the bottom of support plate one, support plate two and support plate three.

[0024] Next, external calibration fixtures are used to fix the four clamping plates and the corresponding lead screws to the outside of the easily deformable parts of the casting with nuts. Then, the fixed casting and fixtures are subjected to solution treatment.

[0025] (2) After the solution treatment, the casting is corrected according to the relevant process requirements. After the correction is completed, aging treatment is carried out. Since the wall thickness of the casting is too thin, it is very easy to deform. Therefore, the aging treatment also requires the use of internal and external correction fixtures to repeat the steps before the solution treatment of the casting and fix the corrected casting.

[0026] After aging, the internal cavity and external dimensions of the casting can be well controlled. The local arcs (easily deformable parts) are prone to outward deformation. By fixing them with clamps, the shape of the arcs can be well controlled, so that the dimensions of the casting meet the requirements.

[0027] The above description is merely a preferred embodiment of the present invention and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A tooling for correcting irregularly shaped, thin-walled castings, characterized in that: The fixture includes internal and external correction fixtures. The internal correction fixture is designed to conform to the internal cavity shape of the irregular curved thin-walled casting. The internal correction fixture includes support plate one, support plate two, and support plate three. Support plate two is located between support plate one and support plate three. The internal correction fixture has a fixing plate one on the right side and a fixing plate two at the bottom. Support plate one, support plate two, and support plate three are detachably connected as one unit through the fixing plate one on the right side and the fixing plate two at the bottom. Fixing plate one is located in the opening on the right side of the irregular curved thin-walled casting, and fixing plate two is located in the opening at the bottom of the irregular curved thin-walled casting. The external correction fixture includes two sets of clamping plates arranged in pairs. Each set of clamping plates has a screw that slides through both ends, and the two ends of the screw are threaded with nuts. The two sets of clamping plates are correspondingly arranged on the outside of the easily deformable parts of the irregular curved thin-walled casting, and the clamping surface of the clamping plates is designed to conform to the external curved surface shape of the irregular curved thin-walled casting.

2. The tooling for correcting irregularly shaped, thin-walled castings according to claim 1, characterized in that: The gap between the internal correction fixture and the inner wall perimeter of the irregular curved thin-walled casting is 0.2 mm.

3. The tooling for correcting irregularly shaped, thin-walled castings according to claim 1, characterized in that: The thickness of the first fixing plate is 5mm, and the thickness of the second fixing plate is 25mm.

4. The tooling for correcting irregularly shaped, thin-walled castings according to claim 1, characterized in that: The first fixing plate and the second fixing plate are detachably connected to the internal correction fixture by bolts.

5. A tooling for correcting irregularly shaped, thin-walled castings according to any one of claims 1 to 4, characterized in that: The outer sides of each set of clamps are set as parallel planes.

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