A drone leading edge test piece bending test tool

Abstract

The utility model discloses a kind of bending test tool of unmanned vehicle front edge test piece in the technical field of static bending test, including mounting seat, the lower end of mounting seat is provided with support, mounting seat is fixedly connected with mounting frame, mounting frame is fixedly connected with connecting plate on it, connecting plate is bolted with fixed end rib on it, reinforcing rib is arranged between connecting plate and mounting seat, test assembly is provided on mounting seat, loading end rib is bolted on test assembly. The utility model is provided with mounting seat and test assembly and other structures, under the premise of meeting extremely high strength and rigidity, the purpose of low cost, short cycle, easy manufacturing is realized, not only provide excellent bending resistance, compression resistance and torsional resistance, ensure that tool is not deformed under huge load, guarantee test data accurate, so that high-precision test results are obtained while, economic and production efficiency can be taken into account.

Description

Technical Field

[0001] This utility model relates to the field of static bending test technology, and in particular to a bending test fixture for a UAV leading edge test piece. Background Technology

[0002] With the development of aviation technology and the continuous innovation of aircraft design concepts, new aircraft have increasingly higher requirements for the performance of their leading edges. For example, high-speed aircraft need to have better thermal shock resistance and aeroelastic performance in their leading edges. This requires accurate simulation of their bending stress during actual flight to optimize design, ensure flight safety, and provide experimental basis for the commissioning of equipment installed on the leading edges.

[0003] During flight, the leading edge of an aircraft is subjected to a complex combination of aerodynamic loads, structural vibration loads, and temperature changes. Traditional test fixtures struggle to accurately simulate these complex load conditions, leading to significant discrepancies between test results and actual flight conditions. However, existing technologies have some problems: the existing UAV leading edge test piece bending test fixture has the problems of complex manufacturing process and large number of parts required, resulting in a long manufacturing cycle; at the same time, its manufacturing cost is high, and the cost of the traditional leading edge test piece bending test fixture is several times that of the improved design, making it difficult to meet the test requirements of low cost and short cycle, and the installation process may be cumbersome, with poor overall practicality and economy. Therefore, we propose a UAV leading edge test piece bending test fixture. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a bending test fixture for UAV leading edge test specimens. The purpose of this utility model is achieved as follows: A bending test fixture for UAV leading edge test specimens includes a mounting base, a bracket at the lower end of the mounting base, a mounting frame fixedly connected to the mounting base, a connecting plate fixedly connected to the mounting frame, a fixed end rib bolted to the connecting plate, a reinforcing rib between the connecting plate and the mounting base, a test component mounted on the mounting base, a loading end rib bolted to the test component, and a test specimen installed between the loading end rib and the fixed end rib.

[0005] Optionally, the mounting base has a mounting groove, the test component is installed in the mounting groove, and a support rod is fixedly installed on the mounting base.

[0006] Optionally, the test assembly includes a hydraulic jack and an adjusting component. One end of the hydraulic jack is hinged to a triangular seat, which is fixedly connected to a mounting groove. The other end of the hydraulic jack is hinged to a first connecting seat, which is connected to a loading short rib bolt. A rib plate is provided on the first connecting seat.

[0007] Optionally, the adjusting component includes a connecting shaft with a through groove and a connecting block, which is threadedly connected to the connecting shaft.

[0008] Optionally, the number of the connecting blocks is two, and the two connecting blocks are symmetrically distributed.

[0009] Optionally, one of the connecting blocks is hinged with a rectangular seat, which is bolted to the mounting slot, and the other connecting block is hinged with a second connecting seat, which is bolted to the loading end rib.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. By setting up structures such as mounting bases and test components, the goal of low cost, short cycle and easy manufacturing is achieved while meeting the requirements of extremely high strength and rigidity. On the one hand, the mounting frame and test components are integrated into modules to simplify the installation process and reduce costs. On the other hand, the use of square steel pipes as the main structure not only provides excellent bending, compressive and torsional resistance, but also ensures that the tooling does not deform under huge loads and guarantees the accuracy of test data. This allows for the acquisition of high-precision test results while taking into account economy and production efficiency.

[0011] 2. From the hinges at both ends of the hydraulic jack, to the symmetrical thread adjustment of the connecting blocks on the adjusting component, and finally to the hinged connection with the rectangular seat and the second connecting seat at the loading end, the entire system forms a highly flexible floating loading system. It can actively absorb and compensate for various minor errors and angle changes generated during the manufacturing, installation and deformation of the test piece under load, ensuring that the loading force always acts vertically and accurately on the predetermined path, and completely eliminating the additional bending moment and stress concentration caused by rigid connection. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the overall structure provided by this utility model.

[0014] Figure 2 This is a schematic diagram of the experimental component structure provided by this utility model.

[0015] Figure 3 This is a schematic diagram of the connection structure of the test piece provided by this utility model.

[0016] In the diagram: 1. Mounting base; 11. Mounting groove; 12. Support rod; 2. Bracket; 3. Mounting frame; 31. Connecting plate; 32. Reinforcing rib; 4. Fixed end rib; 5. Test component; 51. Hydraulic jack; 52. Adjusting component; 5201. Connecting shaft; 5202. Through groove; 5203. Connecting block; 53. Triangular seat; 54. First connecting seat; 55. Rib plate; 56. Rectangular seat; 57. Second connecting seat; 6. Loading end rib; 7. Test piece. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] like Figures 1 to 3 The UAV leading edge test specimen bending test fixture shown includes a mounting base 1, a bracket 2 at the lower end of the mounting base 1, a mounting frame 3 fixedly connected to the mounting base 1, a connecting plate 31 fixedly connected to the mounting frame 3, a fixed end rib 4 bolted to the connecting plate 31, a reinforcing rib 32 between the connecting plate 31 and the mounting base 1, a test component 5 on the mounting base 1, a loading end rib 6 bolted to the test component 5, and a test specimen 7 installed between the loading end rib 6 and the fixed end rib 4.

[0019] Furthermore, by modularly designing and integrating core components such as the installation frame 3 and the test component 5, the manufacturing process is simplified, the number of purchased parts is greatly reduced, and the manufacturing cycle is significantly shortened. Moreover, the convenient layout and connection method of the test component 5 effectively reduces manufacturing costs, while achieving fast and easy installation. Through the comprehensive advantages of low cost, short cycle and easy installation, the inherent defects of traditional tooling in terms of cost, cycle and installation convenience are overcome. First, the mounting base 1, bracket 2 and mounting frame 3 in the overall structure are all made of square steel pipe structure by overlapping. Square steel pipe has excellent bending resistance, compressive strength and torsional resistance, providing the tooling with extremely high structural strength and rigidity, ensuring that it can withstand huge loading forces during the test without deforming itself, thereby ensuring the accuracy and reliability of the test data. Secondly, its cross-sectional shape and structure are stable, and the force is balanced in all directions, which effectively improves the overall resistance to instability and ensures the safety of the test. In addition, the flat surface of the square steel pipe and the overlapping manufacturing process make assembly methods such as bolt connection simple and quick, greatly simplifying the manufacturing process and reducing processing costs. While ensuring strength, its structure is relatively lightweight, making it easy to handle and install.

[0020] Specifically, the mounting base 1 has a mounting groove 11, the test component 5 is installed in the mounting groove 11, and a support rod 12 is fixedly installed on the mounting base 1.

[0021] Furthermore, the concave structure of the mounting groove 11 can effectively prevent the test component 5 from shifting or sliding under severe bending loads, firmly constraining the load in the predetermined direction, and ensuring the purity and accuracy of force transmission. At the same time, with the support rod 12 fixed, a stable support structure is formed, which further enhances the vibration and impact resistance of the test component 5 during the test, ensures the rigidity of the entire loading system, prevents measurement errors caused by micro-movements, and thus ensures the smooth progress of the test and the reliability of the results.

[0022] Specifically, the test component 5 includes a hydraulic jack 51 and an adjusting component 52. One end of the hydraulic jack 51 is hinged to a triangular seat 53, which is fixedly connected to the mounting groove 11. The other end of the hydraulic jack 51 is hinged to a first connecting seat 54, which is connected to a loading short rib bolt. A rib plate 55 is provided on the first connecting seat 54.

[0023] Furthermore, firstly, one end of the hydraulic jack 51 is hinged with a triangular seat 53. The triangular seat 53 has a stable structure and is fixed to the mounting groove 11, providing a fixed fulcrum for the jack and ensuring the initial stability of the loading force. The other end of the hydraulic jack 51 is also hinged to the first connecting seat 54. This gives the loading system universal adaptability. During the test, the surface of the leading edge of the test piece 7 may not be absolutely flat, or complex elastic deformation may occur. The hinge allows the first connecting seat 54 to automatically make small adjustments to its posture according to the actual situation, ensuring that the loading force always acts perpendicularly to the predetermined direction of the loading rib, avoiding additional bending moment or component force caused by angular deviation, thereby ensuring the purity and accuracy of the test loading. Meanwhile, the rib plate 55 significantly enhances the bending strength of the first connecting seat 54, preventing it from deforming and failing under the action of huge concentrated force.

[0024] Specifically, the adjusting component 52 includes a connecting shaft 5201, a through groove 5202 on the connecting shaft 5201, a connecting block 5203 on the connecting shaft 5201, the connecting block 5203 being threadedly connected to the connecting shaft 5201, and there are two connecting blocks 5203, which are symmetrically distributed.

[0025] Furthermore, by turning the connecting block 5203 to move synchronously towards or away from each other along the through groove 5202, the effective length of the connecting shaft 5201 can be precisely adjusted, thereby controlling the working stroke or preload of the hydraulic jack 51. This not only provides a stable and reliable locking force, ensuring that the adjusted position will not loosen under vibration or load, but also the symmetrical distribution of the two connecting blocks 5203 can effectively counteract the additional eccentric force or torque that may be generated during the tightening process, ensuring the stability and coaxiality of the connecting shaft 5201 under force, and avoiding jamming or skewness caused by unilateral adjustment.

[0026] Specifically, a rectangular seat 56 is hinged to one connecting block 5203 and bolted to the mounting groove 11; a second connecting seat 57 is hinged to another connecting block 5203 and bolted to the loading end rib 6.

[0027] Furthermore, the adjusting component 52 is upgraded from a simple length fine-tuning mechanism to a precision mechanism capable of absorbing errors, actively adapting, and accurately centering. The bolt fixing of the rectangular seat 56 to the mounting groove 11 provides a stable reference for the entire system, while the hinge between the rectangular seat 56 and the adjusting component 52 allows the adjusting component 52 to have a certain angular adjustment space during installation, thereby easily compensating for minor positional deviations that may occur during manufacturing or assembly, ensuring smooth initial installation. During the test loading process, when the loading end rib 6 tilts at an angle due to force or deformation, the hinge structure allows the second connecting seat 57 to swing freely, thereby automatically eliminating additional stress caused by deformation of the test piece 7 or uneven installation, ensuring that the load output by the hydraulic jack 51 is always accurately transmitted along the preset direction, avoiding additional bending moments or stress concentrations caused by rigid connections, which not only improves measurement accuracy but also greatly protects the test piece 7 and the loading equipment itself.

[0028] The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A bending test fixture for a UAV leading edge test piece, comprising a mounting base (1), characterized in that: The lower end of the mounting base (1) is provided with a bracket (2), the mounting base (1) is fixedly connected with a mounting frame (3), the mounting frame (3) is fixedly connected with a connecting plate (31), the connecting plate (31) is bolted with a fixing end rib (4), the connecting plate (31) and the mounting base (1) are provided with a reinforcing rib (32), the mounting base (1) is provided with a test component (5), the test component (5) is bolted with a loading end rib (6), and the loading end rib (6) and the fixing end rib (4) are installed with a test piece (7).

2. The bending test fixture for the leading edge test piece of an unmanned aerial vehicle (UAV) according to claim 1, characterized in that: The mounting base (1) has a mounting groove (11), the test component (5) is installed in the mounting groove (11), and a support rod (12) is fixedly installed on the mounting base (1).

3. The bending test fixture for the leading edge test piece of an unmanned aerial vehicle (UAV) according to claim 1, characterized in that: The test assembly (5) includes a hydraulic jack (51) and an adjusting component (52). One end of the hydraulic jack (51) is hinged to a triangular seat (53), which is fixedly connected to the mounting groove (11). The other end of the hydraulic jack (51) is hinged to a first connecting seat (54), which is connected to a loading short rib bolt. A rib plate (55) is provided on the first connecting seat (54).

4. The bending test fixture for the leading edge test piece of an unmanned aerial vehicle (UAV) according to claim 3, characterized in that: The adjusting component (52) includes a connecting shaft (5201), a through groove (5202) is provided on the connecting shaft (5201), and a connecting block (5203) is provided on the connecting shaft (5201), and the connecting block (5203) is threadedly connected to the connecting shaft (5201).

5. The bending test fixture for the leading edge test piece of an unmanned aerial vehicle (UAV) according to claim 4, characterized in that: The number of the connecting blocks (5203) is two, and the two connecting blocks (5203) are symmetrically distributed.

6. The bending test fixture for the leading edge test piece of an unmanned aerial vehicle (UAV) according to claim 5, characterized in that: A rectangular seat (56) is hinged to one of the connecting blocks (5203), and the rectangular seat (56) is bolted to the mounting groove (11). A second connecting seat (57) is hinged to the other connecting block (5203), and the second connecting seat (57) is bolted to the loading end rib (6).

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