Split type small control surface test tool and test method

Abstract

The invention discloses a split type small control surface testing tool and method, the split type small control surface testing tool comprises a clamping platform, a base and a loading assembly, a clamping groove is formed in the middle of the upper surface of the clamping platform, and the base is movably arranged in the clamping groove through a clamping assembly; a limiting boss for fixing a control surface is arranged on the base, the loading assembly comprises a loading rod, the top end of the loading rod is connected with a press machine in a clamping manner, and a loading head is movably arranged at the bottom end of the loading rod; the loading head applies pressure to the control surface; the device is simple to operate and convenient to test, a split structure is adopted, the clamping platform is combined with the base to limit and fix the control surface to be tested, pressure is applied to the control surface through the loading assembly, the pressure test on the control surface to be tested is completed, and meanwhile, the detachable loading head is more suitable for the control surface test of more different molded surfaces.

Description

Technical Field

[0001] This invention relates to the field of rudder surface pressure testing technology, specifically to a split-type small rudder surface testing fixture and testing method. Background Technology

[0002] Control surface pressure testing fixtures are key technical equipment in the aerospace industry. Due to the stringent requirements of the aerospace sector for high-precision control components, control surfaces, as the core of aircraft control, must possess high precision and reliability. During operation, control surfaces must withstand complex aerodynamic loads and mechanical stresses, and their structural strength directly affects equipment safety.

[0003] Traditional testing methods often employ static pressure testing. For large control surfaces, due to their size and shape, a testing fixture is typically designed using a combination of positioning plate through-holes and support blocks. While small control surfaces operate under lower pressure, they still require rapid maneuverability and compact space, placing higher demands on lightweight and miniaturized fixtures. Although large-scale fixture technology is mature, small-scale control surface testing still faces challenges: 1) Space constraints: The compact size of small control surfaces makes it difficult for traditional fixtures to achieve multi-point simultaneous pressure application and deformation detection, necessitating customized miniaturized fixtures, which are costly and susceptible to accuracy interference; 2) Lack of standardization: There is a lack of unified testing specifications for small control surfaces, and incompatible interfaces between fixtures from different manufacturers result in poor data comparability, impacting R&D efficiency. To address these challenges, the design of small-scale fixtures needs to be more integrated and intelligent, while also focusing on resolving reliability issues under complex operating conditions. Summary of the Invention

[0004] To address the aforementioned problems in the prior art, this invention provides a split-type small control surface testing fixture and testing method, which solves the problem of difficult mechanical testing of existing small control surfaces.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: On the one hand, a split-type small control surface testing fixture is provided, which includes a clamping platform and a loading component. A clamping groove is provided in the middle of the upper surface of the clamping platform, and a base is movably disposed in the clamping groove through the clamping component. A limiting boss for fixing the control surface is provided on the base. The loading component includes a loading rod, the top end of which is clamped and connected to a press, and a loading head is movably disposed at the bottom end of the loading rod. The loading head applies pressure to the control surface.

[0006] This invention is simple to operate and convenient to test. It adopts a split structure, which uses a clamping platform and base to provide limit fixation for the control surface to be tested, and uses a loading component to apply pressure to the control surface to complete the pressure test of the control surface to be tested. At the same time, the detachable loading head is more suitable for testing control surfaces with more different shapes.

[0007] Furthermore, a first T-shaped groove is provided at the bottom end of the loading rod, and a first T-shaped block is provided on the upper surface of the loading head to fit the first T-shaped groove, with the first T-shaped block embedded in the first T-shaped groove.

[0008] Furthermore, the base includes a substrate, and a limiting boss for fixing the rudder surface is provided in the middle of the upper surface of the substrate; two limiting grooves are formed at opposite ends of the substrate.

[0009] Furthermore, a limiting hole for inserting the rudder shaft on the rudder surface is provided on one side wall of the limiting boss, and a first positioning hole acting on the rudder shaft on the rudder surface is provided on the limiting boss above the limiting hole.

[0010] Furthermore, a second positioning hole is provided on the substrate located on one side of the limiting hole.

[0011] Furthermore, the clamping assembly includes a second T-block, a screw, and a nut; the second T-block is embedded in the clamping groove; One end of the screw is connected to the second T-shaped block, and the other end of the screw passes through the clamping groove and the limiting groove, and is connected to the screw by a nut, thereby fixing the substrate on the clamping platform.

[0012] On the other hand, a testing method based on a split-type small control surface testing fixture is provided, which includes the following steps: Step S1: Fix the clamping platform to the working platform of the press, and clamp and connect the top of the loading rod to the output end of the press. Step S2: Place the base on the clamping platform and lower the loading rod using a press so that the bottom end of the loading rod passes through the second positioning hole to determine the relative position of the clamping platform and the base. Step S3: Secure the clamping platform and base using the clamping assembly; Step S4: Raise the loading rod with a press, insert the rudder shaft on the rudder surface into the limiting hole, and fix the rudder surface by inserting the positioning pin into the first positioning hole; Step S5: Place the loading head at the bottom of the loading rod and lower the loading rod using a press to make the loading head at the bottom of the loading rod fit against the upper surface of the rudder surface; Step S6: Continue operating the press, lower the loading rod, and apply a vertically downward load to the rudder surface to obtain rudder surface pressure data.

[0013] This invention discloses a split-type small control surface testing fixture and testing method, the beneficial effects of which are: This invention is simple to operate and convenient to test. It adopts a split structure, which uses a clamping platform and base to provide limit fixation for the control surface to be tested, and uses a loading component to apply pressure to the control surface to complete the pressure test of the control surface to be tested. At the same time, the detachable loading head is more suitable for testing control surfaces with more different shapes. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a split-type small rudder surface testing fixture according to the present invention.

[0015] Figure 2 This is a schematic diagram of the connection structure between the clamping platform and the base of the present invention.

[0016] Figure 3 This is a schematic diagram of the base structure of the present invention.

[0017] Figure 4 This is a schematic diagram of the loading component of the present invention.

[0018] Among them, 1. clamping platform; 11. clamping groove; 2. clamping assembly; 21. second T-block; 22. screw; 23. nut; 3. base; 31. base plate; 32. limiting boss; 33. limiting groove; 34. limiting hole; 35. first positioning hole; 36. second positioning hole; 4. rudder surface; 6. loading rod; 61. first T-slot; 7. loading head; 71. first T-block. Detailed Implementation The specific embodiments of the present invention are described below to enable those skilled in the art to understand the present invention. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, various changes are obvious as long as they are within the spirit and scope of the present invention as defined and determined by the appended claims. All inventions utilizing the concept of the present invention are protected.

[0019] Example 1 refer to Figures 1-4 This embodiment provides a split-type small control surface testing fixture, the purpose of which is to solve the problem of difficult mechanical testing of existing small control surfaces. The specific structure of this embodiment will be described in detail below.

[0020] A split-type small control surface testing fixture, which includes a clamping platform 1 and a loading component; The clamping platform 1 has a clamping groove 11 in the middle of its upper surface, and a base 3 is movably disposed in the clamping groove 11 through the clamping assembly 2; the base 3 is provided with a limiting boss 32 for fixing the rudder surface 4. Specifically, the loading component includes a loading rod 6, the top end of which is connected to a press clamp, and a loading head 7 is movably mounted on the bottom end of the loading rod 6; the loading head 7 applies pressure to the rudder surface 4.

[0021] In this embodiment, the clamping platform 1 is fixed on the working platform of the press, the rudder surface 4 to be tested is fixed on the base 3, and the base 3 is fixed on the clamping platform 1 by the clamping assembly 2. Thus, the clamping platform 1 provides the limiting and fixing of the rudder surface 4 to be tested. The loading rod 6 of the loading assembly is clamped and connected to the press. The press drives the loading rod 6, causing the loading head 7 at the bottom of the loading rod 6 to fit against the upper surface of the rudder surface 4, thereby applying pressure to the rudder surface 4 and applying a vertically downward load to the rudder surface 4, thereby obtaining the pressure data of the rudder surface 4 and completing the pressure test of the rudder surface 4 to be tested.

[0022] Specifically, the bottom end of the loading rod 6 is provided with a first T-shaped groove 61, and the upper surface of the loading head 7 is provided with a first T-shaped block 71 that fits into the first T-shaped groove 61. The first T-shaped block 71 is embedded in the first T-shaped groove 61.

[0023] In this embodiment, the contact surface between the loading head 7 and the rudder surface 4 is matched with the upper surface of the rudder surface 4. The shape and size of the first T-shaped groove 61 and the first T-shaped block 71 are matched. Thus, the loading head 7 is installed at the bottom end of the loading rod 6 by embedding the first T-shaped block 71 into the first T-shaped groove 61. Therefore, a matching loading head 7 can be selected according to the rudder surface 4 to be tested. The cooperation between the first T-shaped groove 61 and the first T-shaped block 71 facilitates the replacement of the loading head 7.

[0024] Specifically, the base 3 includes a base plate 31, and a limiting boss 32 for fixing the rudder surface 4 is provided in the middle of the upper surface of the base plate 31; two limiting grooves 33 are opened at opposite ends of the base plate 31.

[0025] Specifically, a limiting hole 34 for inserting the rudder shaft on the rudder surface 4 is provided on one side wall of the limiting boss 32, and a first positioning hole 35 for acting on the rudder shaft on the rudder surface 4 is provided on the limiting boss 32 above the limiting hole 34.

[0026] In this embodiment, a limiting boss 32 is provided on one side of the middle part of the upper surface of the substrate 31. The limiting boss 32 is used to fix the rudder surface 4 to be tested. A limiting hole 34 is opened on the side wall of the limiting boss 32. A first positioning hole 35 is opened on the limiting boss 32 above the limiting hole 34. Thus, by inserting the rudder shaft of the rudder surface 4 to be tested into the limiting hole 34, and then inserting the positioning pin through the first positioning hole 35 into the reserved positioning hole on the rudder shaft, the rudder surface 4 to be tested is fixed on the limiting boss 32.

[0027] Specifically, a second positioning hole 36 is provided on the substrate 31 located on one side of the limiting hole 34.

[0028] In this embodiment, a second positioning hole 36 is provided on one side of the upper limit boss 32 on the substrate 31. When the loading rod 6 descends, the bottom end of the loading rod 6 falls into the second positioning hole 36, thereby determining the relative position between the base 3 and the clamping platform 1, so as to ensure that the rudder surface 4, the loading rod 6 and the loading head 7 are on the same vertical line.

[0029] Specifically, the clamping assembly 2 includes a second T-shaped block 21, a screw 22, and a nut 23; the second T-shaped block 21 is embedded in the clamping groove 11; one end of the screw 22 is connected to the second T-shaped block 21, and the other end of the screw 22 passes through the clamping groove 11 and the limiting groove 33, and is screwed to the screw 22 through the nut 23, thereby fixing the substrate 31 on the clamping platform 1.

[0030] In this embodiment, the clamping groove 11 is a T-shaped groove and fits with the second T-shaped block 21. After determining the relative position between the base 3 and the clamping platform 1, the second T-shaped block 21 is embedded in the clamping groove 11. A threaded groove is provided on the upper end face of the second T-shaped block 21. One end of the screw 22 is screwed into the threaded groove and connected to the second T-shaped block 21. At the same time, the other end of the screw 22 passes through the clamping groove 11 and the limiting groove 33 and is connected to the nut 23 by threads to connect the substrate 31 and the clamping platform 1, thereby fixing the substrate 31 on the clamping platform 1.

[0031] Optionally, screw 22 can be a double-ended stud.

[0032] Example 2 refer to Figures 1-4 This embodiment provides a testing method based on a split-type small control surface testing fixture, which aims to solve the problem of difficult mechanical testing of existing small control surfaces. The specific structure of this embodiment will be described in detail below.

[0033] A testing method based on a split-type small control surface testing fixture includes the following steps: Step S1: Fix the clamping platform 1 on the working platform of the press, and clamp and connect the top end of the loading rod 6 to the output end of the press. In this embodiment, the clamping platform 1 is placed on the working platform of the press, and then the top end of the loading rod 6 is clamped by the universal chuck of the press, so that the loading rod 6 is clamped and connected to the output end of the press.

[0034] Step S2: Place the base 3 on the clamping platform 1, and lower the loading rod 6 using a press so that the bottom end of the loading rod 6 passes through the second positioning hole 36 to determine the relative position of the clamping platform 1 and the base 3. In this embodiment, the base 3 is placed on the clamping platform 1, and the loading rod 6 is lowered by the press to adjust the relative position of the base 3 and the clamping platform 1 so that the bottom end of the loading rod 6 passes through the second positioning hole 36 for positioning and is maintained in this state.

[0035] Step S3: Secure the clamping platform 1 and the base 3 using the clamping assembly 2; In this embodiment, while maintaining the positioning state, the second T-shaped block 21 is embedded in the clamping groove 11, and one end of the screw 22 is screwed into the threaded groove to connect with the second T-shaped block 21. The other end of the screw 22 passes through the clamping groove 11 and the limiting groove 33 and is connected to the nut 23 by thread to connect the base plate 31 and the clamping platform 1, thereby fixing the base 3 on the clamping platform 1.

[0036] Step S4: Raise the loading rod 6 using a press, insert the rudder shaft on the rudder surface 4 into the limiting hole 34, and fix the rudder surface 4 by inserting the positioning pin into the first positioning hole 35. In this embodiment, after the base 3 is fixed on the clamping platform 1, the loading rod 6 is raised by the press. Then, the rudder shaft on the rudder surface 4 is inserted into the limiting hole 34, and the rudder surface 4 is fixed by inserting the positioning pin into the first positioning hole 35 to fix the rudder surface 4 and prevent the rudder surface from rotating under force.

[0037] Step S5: Place the loading head 7 at the bottom of the loading rod 6, and lower the loading rod 6 using a press to make the loading head 7 at the bottom of the loading rod 6 fit against the upper surface of the rudder surface 4. In this embodiment, the loading head 7, which matches the rudder surface 4 to be tested, is installed at the bottom of the loading rod 6 by the cooperation of the first T-shaped groove 61 and the first T-shaped block 71. Then, the loading rod 6 is lowered by the press so that the loading head 7 at the bottom of the loading rod 6 fits against the upper surface of the rudder surface 4.

[0038] Step S6: Continue operating the press, lower the loading rod 6, and apply a vertically downward load to the rudder surface 4 to obtain rudder surface pressure data.

[0039] In this embodiment, with the loading head 7 in contact with the upper surface of the rudder surface 4, the press continues to operate, the loading rod 6 is lowered, and a vertically downward load is applied to the rudder surface 4 to obtain rudder surface pressure data, thereby completing the pressure test of the rudder surface 4 to be tested.

[0040] Although specific embodiments of the invention have been described in detail with reference to the accompanying drawings, this should not be construed as limiting the scope of protection of this patent. Various modifications and variations that can be made by a person skilled in the art without inventive effort within the scope described in the claims still fall within the scope of protection of this patent.

Claims

1. A split-type small control surface testing fixture, characterized in that: Includes a clamping platform (1) and a loading component; The clamping platform (1) has a clamping groove (11) in the middle of its upper surface. A base (3) is movably disposed in the clamping groove (11) through a clamping assembly (2). A limiting boss (32) for fixing the rudder surface (4) is provided on the base (3). The loading assembly includes a loading rod (6), the top end of which is clamped and connected to a press, and a loading head (7) is movably provided at the bottom end of the loading rod (6); the loading head (7) applies pressure to the rudder surface (4).

2. The split-type miniature control surface testing fixture according to claim 1, characterized in that: The bottom end of the loading rod (6) is provided with a first T-shaped groove (61), and the upper surface of the loading head (7) is provided with a first T-shaped block (71) that fits into the first T-shaped groove (61). The first T-shaped block (71) is embedded in the first T-shaped groove (61).

3. The split-type miniature control surface testing fixture according to claim 1, characterized in that: The base (3) includes a base plate (31), and a limiting boss (32) for fixing the rudder surface (4) is provided in the middle of the upper surface of the base plate (31); two limiting grooves (33) are opened at opposite ends of the base plate (31).

4. The split-type small control surface testing fixture according to claim 3, characterized in that: The limiting boss (32) has a limiting hole (34) on one side wall for inserting the rudder shaft on the rudder surface (4), and the limiting boss (32) above the limiting hole (34) has a first positioning hole (35) that acts on the rudder shaft on the rudder surface (4).

5. The split-type miniature control surface testing fixture according to claim 4, characterized in that: A second positioning hole (36) is provided on the substrate (31) located on one side of the limiting hole (34).

6. The split-type small control surface testing fixture according to claim 3, characterized in that: The clamping assembly (2) includes a second T-shaped block (21), a screw (22), and a nut (23); the second T-shaped block (21) is embedded in the clamping groove (11); One end of the screw (22) is connected to the second T-block (21), and the other end of the screw (22) passes through the clamping groove (11) and the limiting groove (33), and is screwed to the screw (22) by the nut (23) to fix the substrate (31) on the clamping platform (1).

7. A testing method based on the split-type small control surface testing fixture according to any one of claims 1-6, characterized in that, Includes the following steps: Step S1: Fix the clamping platform (1) on the working platform of the press, and clamp and connect the top end of the loading rod (6) to the output end of the press. Step S2: Place the base (3) on the clamping platform (1), and lower the loading rod (6) by press so that the bottom end of the loading rod (6) passes through the second positioning hole (36) to determine the relative position of the clamping platform (1) and the base (3); Step S3: Fix the clamping platform (1) and the base (3) by using the clamping assembly (2); Step S4: Raise the loading rod (6) using a press, insert the rudder shaft on the rudder surface (4) into the limiting hole (34), and fix the rudder surface (4) by inserting the positioning pin into the first positioning hole (35). Step S5: Place the loading head (7) at the bottom of the loading rod (6) and lower the loading rod (6) using a press so that the loading head (7) at the bottom of the loading rod (6) fits against the upper surface of the rudder surface (4); Step S6: Continue operating the press, lower the loading rod (6), and apply a vertically downward load to the rudder surface (4) to obtain the rudder surface pressure data.

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