Variable diameter support device for maintaining stability of lightweight alloy thin-walled cylindrical members and applications thereof

Abstract

A variable-diameter supporting device for maintaining the stability of a light alloy thin-walled cylindrical member and its application belong to the technical field of machining. The purpose of the present application is to solve the problem that the existing light alloy thin-walled cylindrical member is not uniform in stress during machining, is prone to indentation or deformation, and thus affects the stability of the overall structure. A variable-diameter supporting device for maintaining the stability of a light alloy thin-walled cylindrical member comprises a central fixed lead screw, a supporting arm, a supporting plate, a first sliding block adjusting structure, a second sliding block adjusting structure, and two locking nuts. The variable-diameter supporting device for maintaining the stability of a light alloy thin-walled cylindrical member is used to assist the machining forming of a light alloy thin-walled cylindrical member. The present application adopts a variable-diameter supporting arm, adjusts the supporting diameter by using the sliding block adjusting structure, and locks by using the locking nuts, which is simple to operate, high in efficiency, and can adapt to workpieces of different diameters.

Description

Technical Field

[0001] This invention belongs to the field of machining technology, specifically relating to a variable diameter support device and its application. Background Technology

[0002] Currently, materials used in the aerospace and military industries require both stability and lightweight design. These applications demand not only higher overall material performance but also the ability to reduce weight to increase Mach numbers and flight range, posing a significant challenge to the density of structural materials. It is understood that lightweight alloys such as aluminum alloys and traditional magnesium alloys are most commonly used in these fields. While magnesium alloys have a much shorter history of application than aluminum alloys, their lightweight and recyclable characteristics have made them a rapidly rising engineering material in modern industry. Among these, those with a density of less than 1.5 g / cm³... 3 Furthermore, the development and application of magnesium-lithium alloys with high specific strength fills the gap between traditional magnesium alloys and polymeric non-metallic materials. Magnesium-lithium alloys, with their unique advantages, have attracted attention from specialized fields both domestically and internationally, receiving substantial resource support in their research and application.

[0003] However, the high technical requirements of magnesium-lithium alloy processing limit its commercial development in the civilian sector, especially in the machining of thin-walled cylindrical components. Existing magnesium-lithium alloy thin-walled cylindrical components experience uneven stress during machining, making them prone to dents or deformation, resulting in poor overall structural stability. This problem significantly restricts the application of magnesium-lithium alloy thin-walled cylindrical components. Currently, traditional methods to address deformation mainly focus on controlling various stages of heat treatment and machining processes to minimize deformation through appropriate processing methods. However, the results are often unsatisfactory. In recent years, some have used post-machining shaping methods to eliminate deformation, such as the invention patent "A Shaping Fixture for Thin-Walled Cylindrical Parts" published in 2018. However, this method is only suitable for components with relatively simple shapes and structures, and it is difficult to eliminate deformation for components with complex shapes and high precision requirements. Therefore, solving the problem of uneven stress and poor stability of magnesium-lithium alloy thin-walled cylindrical components during machining has become crucial for improving the quality of the final formed components. Summary of the Invention

[0004] The purpose of this invention is to solve the problem that existing lightweight alloy thin-walled cylindrical components are subject to uneven stress during machining, which easily leads to dents or deformations and thus affects the overall structural stability. The invention provides a variable diameter support device for maintaining the stability of lightweight alloy thin-walled cylindrical components and its application.

[0005] A variable diameter support device for maintaining the stability of a lightweight alloy thin-walled cylindrical component includes a central fixed screw 1, a support arm 2, a support plate 3, a first slider adjustment structure 4, a second slider adjustment structure 5, and two locking nuts 6.

[0006] The support arm 2 includes a first support arm and a second support arm;

[0007] The first support arm is disposed between the support plate 3 and the first slider adjustment structure 4, and is connected to both by bolts.

[0008] The second support arm is disposed between the support plate 3 and the second slider adjustment structure 5, and is connected to both by bolts;

[0009] The first slider adjustment structure 4, the second slider adjustment structure 5, and the locking nut 6 are fitted onto the central fixed screw 1; the first slider adjustment structure 4 and the second slider adjustment structure 5 are arranged between the two locking nuts 6.

[0010] A variable diameter support device for maintaining the stability of a lightweight alloy thin-walled cylindrical component is used to assist in the machining of the lightweight alloy thin-walled cylindrical component.

[0011] The principles and advantages of this invention:

[0012] I. Based on the existing machining of lightweight alloy thin-walled cylindrical components, this invention inserts a variable diameter support device into the component to maintain the stability of the lightweight alloy thin-walled cylindrical component. This device provides support from inside the component, making the stress more uniform during machining and less prone to dents or deformation, thus greatly improving the overall stability of the component.

[0013] Second, the present invention uses a variable diameter support arm 2, which adjusts the support diameter using a slider adjustment structure and locks it with a locking nut. It is simple and convenient to operate, highly efficient, and can adapt to workpieces of different diameters.

[0014] Third, compared with conventional machining methods, the components machined by the present invention have smooth cylinder walls with no obvious defects, which provides a strong guarantee for subsequent processes and greatly improves the yield of components. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a variable diameter support device for maintaining the stability of a lightweight alloy thin-walled cylindrical component according to the present invention. In the figure, 1 is the central fixed screw, 2 is the support arm, 3 is the support plate, 4 is the first slider adjustment structure, 5 is the second slider adjustment structure, and 6 is the locking nut.

[0016] Figure 2 This is a physical image of a variable diameter support device for maintaining the stability of a lightweight alloy thin-walled cylindrical component according to the present invention;

[0017] Figure 3 This is a schematic diagram illustrating the machining process of a magnesium-lithium alloy cylindrical component using a variable-diameter support device for maintaining the stability of a lightweight alloy thin-walled cylindrical component according to the present invention. Figure a) shows the device in its retracted state, Figure b) shows the device in its operating state, and Figure c) shows the machining state of the magnesium-lithium alloy cylindrical component.

[0018] Figure 4 This is a photograph of a machined magnesium-lithium alloy cylindrical component using a variable diameter support device for maintaining the stability of a lightweight alloy thin-walled cylindrical component according to the present invention.

[0019] Figure 5 The figures show simulations of machining deformations produced by conventional machining and machining magnesium-lithium alloy cylindrical components using the variable-diameter support device for maintaining the stability of lightweight alloy thin-walled cylindrical components as described in this invention; wherein, Figure a) shows the machining deformation produced by conventional machining of magnesium-lithium alloy cylindrical components, and Figure b) shows the machining deformation produced by machining magnesium-lithium alloy cylindrical components using the support device described in this invention.

[0020] Figure 6 This is a photograph of a magnesium-lithium alloy cylindrical component machined using conventional machining methods. Detailed Implementation

[0021] Specific implementation method one: This implementation method is a variable diameter support device for maintaining the stability of a lightweight alloy thin-walled cylindrical component, including a central fixed screw 1, a support arm 2, a support plate 3, a first slider adjustment structure 4, a second slider adjustment structure 5, and two locking nuts 6.

[0022] The support arm 2 includes a first support arm and a second support arm;

[0023] The first support arm is disposed between the support plate 3 and the first slider adjustment structure 4, and is connected to both by bolts.

[0024] The second support arm is disposed between the support plate 3 and the second slider adjustment structure 5, and is connected to both by bolts;

[0025] The first slider adjustment structure 4, the second slider adjustment structure 5, and the locking nut 6 are fitted onto the central fixed screw 1; the first slider adjustment structure 4 and the second slider adjustment structure 5 are arranged between the two locking nuts 6.

[0026] Specific Implementation Method Two: This implementation method differs from Specific Implementation Method One in that the first support arm is a single support rod, and the second support arm consists of two support rods; the first support arm on the lower surface of the support plate 3 is positioned between the two support rods of the second support arm. Other steps are the same as in Specific Implementation Method One.

[0027] Specific Implementation Method Three: This implementation method differs from Specific Implementation Method One or Two in that the first slider adjustment structure 4, the second slider adjustment structure 5, and the locking nut 6 can slide freely on the central fixed lead screw 1. Other steps are the same as in Specific Implementation Method One or Two.

[0028] Specific Implementation Method Four: This implementation method differs from Specific Implementation Methods One to Three in that: the support arms 2 consist of four sets, and the support arms 2 are opened and closed by the first slider adjustment structure 4 and the second slider adjustment structure 5. Other steps are the same as in Specific Implementation Methods One to Three.

[0029] Specific Implementation Method Five: This implementation method differs from Specific Implementation Methods One to Four in that there are four support plates 3. The support plates 3 achieve contact and support with the inner wall of the thin-walled cylindrical component by adjusting the opening and closing of the support arms 2. The other steps are the same as in Specific Implementation Methods One to Four.

[0030] Specific Implementation Method Six: This implementation method differs from Specific Implementation Methods One to Five in that the central fixed lead screw 1, the first slider adjustment structure 4, and the second slider adjustment structure 5 are made of 45# steel; the support arm 2 and the support plate 3 are made of aluminum alloy. The other steps are the same as in Specific Implementation Methods One to Five.

[0031] Specific Implementation Method Seven: This implementation method differs from Specific Implementation Methods One to Six in that the support plate 3 is an arc-shaped plate with a certain angle, ranging from 30° to 45°, to evenly distribute the supporting force. The other steps are the same as in Specific Implementation Methods One to Six.

[0032] Specific Implementation Method Eight: This implementation method differs from Specific Implementation Methods One to Seven in that the surface of the support plate 3 is coated with polytetrafluoroethylene or polyurethane to avoid wear on the inner wall of the container. The other steps are the same as in Specific Implementation Methods One to Seven.

[0033] Specific Implementation Method Nine: This implementation method differs from Specific Implementation Methods One to Eight in that the material of the lightweight alloy thin-walled cylindrical component is magnesium alloy, titanium alloy, aluminum alloy, or magnesium-lithium alloy. The other steps are the same as in Specific Implementation Methods One to Eight.

[0034] Specific Implementation Method Ten: This implementation method is a variable diameter support device for maintaining the stability of a lightweight alloy thin-walled cylindrical component, used to assist in the machining of the lightweight alloy thin-walled cylindrical component. Specifically, it is completed according to the following steps:

[0035] 1. Rotate the two locking nuts 6 to loosen the support arm 2 and put it in the retracted state;

[0036] 2. A variable diameter support device for maintaining the stability of a lightweight alloy thin-walled cylindrical component is inserted into the lightweight alloy thin-walled cylindrical component as a whole. By adjusting the position of the first slider adjustment structure 4 and the second slider adjustment structure 5, the support arm 2 is gradually extended to approach the inner wall of the cylindrical component.

[0037] 3. When the support plate 3 at the end of the support arm 2 contacts the cylindrical component, stop adjusting and confirm that the support arm 2 has been fully extended and the support plate 3 has provided uniform support force to the inner wall of the cylindrical component.

[0038] 4. Once the support arm 2 reaches the desired position, rotate and tighten the two locking nuts 6 to fix the support arm 2 in the predetermined position.

[0039] 5. Machining of lightweight alloy thin-walled cylindrical components.

[0040] The beneficial effects of the present invention are verified using the following embodiments:

[0041] Example 1: A variable diameter support device for maintaining the stability of a lightweight alloy thin-walled cylindrical component, comprising a central fixed screw 1, a support arm 2, a support plate 3, a first slider adjustment structure 4, a second slider adjustment structure 5, and two locking nuts 6;

[0042] The support arm 2 includes a first support arm and a second support arm;

[0043] The first support arm is disposed between the support plate 3 and the first slider adjustment structure 4, and is connected to both by bolts.

[0044] The second support arm is disposed between the support plate 3 and the second slider adjustment structure 5, and is connected to both by bolts;

[0045] The first slider adjustment structure 4, the second slider adjustment structure 5, and the locking nut 6 are sleeved on the central fixed screw 1; the first slider adjustment structure 4 and the second slider adjustment structure 5 are arranged between the two locking nuts 6.

[0046] The first support arm is a single support rod, and the second support arm is two support rods; the first support arm on the lower surface of the support plate 3 is positioned between the two support rods of the second support arm;

[0047] The first slider adjustment structure 4, the second slider adjustment structure 5, and the locking nut 6 can slide freely on the central fixed screw 1;

[0048] The support arms 2 consist of 4 sets, and the support arms 2 are opened and closed by the first slider adjustment structure 4 and the second slider adjustment structure 5.

[0049] There are four support plates 3. The support plates 3 achieve contact and support with the inner wall of the thin-walled cylindrical component by adjusting the opening and closing of the support arms 2.

[0050] The central fixed lead screw 1, the first slider adjustment structure 4, and the second slider adjustment structure 5 are made of 45# steel; the support arm 2 and the support plate 3 are made of 2219 aluminum alloy.

[0051] The support plate 3 is an arc-shaped plate with a certain angle, which is 45°;

[0052] The surface of the support plate 3 is coated with polytetrafluoroethylene.

[0053] Example 2: The method for machining a lightweight alloy thin-walled cylindrical component using the variable diameter support device for maintaining stability described in Example 1 is specifically completed according to the following steps:

[0054] 1. Rotate the two locking nuts 6 to loosen the support arm 2 and put it in the retracted state;

[0055] 2. A variable diameter support device for maintaining the stability of a lightweight alloy thin-walled cylindrical component is inserted into the lightweight alloy thin-walled cylindrical component as a whole. By adjusting the position of the first slider adjustment structure 4 and the second slider adjustment structure 5, the support arm 2 is gradually extended to approach the inner wall of the cylindrical component.

[0056] The lightweight alloy thin-walled cylindrical component mentioned in step two is made of LAZ931 magnesium-lithium alloy.

[0057] 3. When the support plate 3 at the end of the support arm 2 contacts the cylindrical component, stop adjusting and confirm that the support arm 2 has been fully extended and the support plate 3 has provided uniform support force to the inner wall of the cylindrical component.

[0058] 4. Once the support arm 2 reaches the desired position, rotate and tighten the two locking nuts 6 to fix the support arm 2 in the predetermined position.

[0059] 5. Machining of lightweight alloy thin-walled cylindrical components.

[0060] Figure 5 The figures show simulations of machining deformations produced by conventional machining and machining magnesium-lithium alloy cylindrical components using the variable-diameter support device for maintaining the stability of lightweight alloy thin-walled cylindrical components as described in this invention; wherein, Figure a) shows the machining deformation produced by conventional machining of magnesium-lithium alloy cylindrical components, and Figure b) shows the machining deformation produced by machining magnesium-lithium alloy cylindrical components using the support device described in this invention.

[0061] from Figure 5As shown in a), a large displacement of 0.478 mm occurs at the location where the load is applied, while the final wall thickness of the workpiece over a large area is 2–2.5 mm. This will have a significant impact on the shape error. Furthermore, it can be seen that the deformation range is very large, with a deformation of approximately 0.2 mm still occurring about 260 mm from the loading point. This will cause significant geometric deformation and machining errors in the machined workpiece, which is unacceptable in actual machining. During cutting, this will lead to deformation of the component during the cutting process, affecting machining accuracy and surface quality.

[0062] from Figure 5 As can be seen from b), the maximum deformation generated during the machining process is 0.065 mm, which is much smaller than the deformation during conventional machining. Furthermore, the overall deformation and deformation range are also smaller than those without the support device, resulting in a significant improvement in the overall stability of the component.

[0063] Figure 6 A photograph of a magnesium-lithium alloy cylindrical component machined using conventional machining methods;

[0064] from Figure 6 As can be seen, due to the large amount of deformation during conventional machining, the components are subjected to uneven stress, which easily leads to defects such as dents or deformation, causing great difficulties for subsequent processes.

[0065] Figure 4 This is a photograph of a machined magnesium-lithium alloy cylindrical component using a variable diameter support device for maintaining the stability of a lightweight alloy thin-walled cylindrical component according to the present invention.

[0066] pass Figure 4 and Figure 6 As can be seen from the comparison, the component cylinder wall after machining using the support device in this invention is smooth, without obvious dents or deformation, which lays the foundation for the success of the final component.

Claims

1. A variable diameter support device for maintaining the stability of a lightweight alloy thin-walled cylindrical component, characterized in that... The device includes a central fixed lead screw (1), a support arm (2), a support plate (3), a first slider adjustment structure (4), a second slider adjustment structure (5), and two locking nuts (6). The support arm (2) includes a first support arm and a second support arm; The first support arm is disposed between the support plate (3) and the first slider adjustment structure (4) and is connected to both by bolts; The second support arm is disposed between the support plate (3) and the second slider adjustment structure (5) and is connected to both by bolts; The first slider adjustment structure (4), the second slider adjustment structure (5), and the locking nut (6) are fitted onto the central fixed screw (1); the first slider adjustment structure (4) and the second slider adjustment structure (5) are arranged between the two locking nuts (6); The first slider adjustment structure (4), the second slider adjustment structure (5), and the locking nut (6) can slide freely on the central fixed screw (1); The support arm (2) consists of 4 sets, and the support arm (2) is opened and closed by the drive of the first slider adjustment structure (4) and the second slider adjustment structure (5); There are four support plates (3). The support plates (3) achieve contact and support with the inner wall of the thin-walled cylindrical component by adjusting the opening and closing of the support arms (2).

2. The variable diameter support device for maintaining the stability of a lightweight alloy thin-walled cylindrical component according to claim 1, characterized in that... The first support arm is a single support rod, and the second support arm is two support rods; the first support arm on the lower surface of the support plate (3) is positioned between the two support rods of the second support arm.

3. The variable diameter support device for maintaining the stability of a lightweight alloy thin-walled cylindrical component according to claim 1, characterized in that... The central fixed lead screw (1), the first slider adjustment structure (4) and the second slider adjustment structure (5) are made of No. 45 steel; the support arm (2) and the support plate (3) are made of aluminum alloy.

4. The variable diameter support device for maintaining the stability of a lightweight alloy thin-walled cylindrical component according to claim 1, characterized in that... The support plate (3) is an arc-shaped plate with a certain angle, which is 30°~45°.

5. A variable diameter support device for maintaining the stability of a lightweight alloy thin-walled cylindrical component according to claim 1, characterized in that... The surface of the support plate (3) is coated with polytetrafluoroethylene or polyurethane coating.

6. A variable diameter support device for maintaining the stability of a lightweight alloy thin-walled cylindrical component according to claim 1, characterized in that... The lightweight alloy thin-walled cylindrical component is made of magnesium alloy, titanium alloy, aluminum alloy or magnesium-lithium alloy.

7. The application of the variable diameter support device for maintaining the stability of a lightweight alloy thin-walled cylindrical component as described in any one of claims 1 to 6, characterized in that... A variable-diameter support device for maintaining the stability of a lightweight alloy thin-walled cylindrical component is used to assist in the machining of the lightweight alloy thin-walled cylindrical component, specifically completed according to the following steps:

1. Rotate the two locking nuts (6) to loosen the support arm (2) and put it in a retracted state; 2. A variable diameter support device for maintaining the stability of a lightweight alloy thin-walled cylindrical component is inserted into the interior of the lightweight alloy thin-walled cylindrical component. By adjusting the positions of the first slider adjustment structure (4) and the second slider adjustment structure (5), the support arm (2) is gradually extended to approach the inner wall of the cylindrical component.

3. When the support plate (3) at the end of the support arm (2) contacts the cylindrical component, stop adjusting and confirm that the support arm (2) has been fully extended and the support plate (3) has provided uniform support force to the inner wall of the cylindrical component.

4. When the support arm (2) reaches the required position, rotate and tighten the two locking nuts (6) to fix the support arm (2) in the predetermined position; 5. Machining of lightweight alloy thin-walled cylindrical components.

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