Strength detection device and strength detection method for empennage frame

Abstract

The invention discloses a strength detection device for an empennage frame, and the device comprises an empennage frame fixing assembly which is used for fixing an empennage frame workpiece in a detection process; the empennage frame detection assembly is used for providing pressure for the empennage frame workpiece and detecting the empennage frame workpiece; and the testing machine assembly is connected with the empennage frame detection assembly and is used for providing power and recording the pressure. According to the device provided by the invention, the stress state of the empennage frame under the actual working condition can be accurately reproduced, the test condition is ensured to be highly consistent with the real scene, and the detection result has higher engineering reference value; the empennage frame strength detection device in the structural form is simple in structure, reasonable in layout and convenient to operate, parts can be quickly mounted and dismounted, the pressure condition borne by the empennage frame in the working process is simulated, and the strength of the empennage frame is detected. The detection device is simple in manufacturing process and low in processing cost, and can visually distinguish the parts under the specified load and ensure the part form integrity, the assembly quality consistency and the part performance reliability after the parts are pressed.

Description

Technical Field

[0001] The present invention relates to the technical field of detection devices, and in particular to a strength detection device and a strength detection method for a fin frame. Background Art

[0002] In a certain aircraft, the fin frame needs to withstand a large force during the attitude control of the aircraft. To ensure product quality, it is necessary to simulate the pressure received by the fin frame during the working process, detect the strength of the fin frame, and prevent the deformation or even tearing failure of parts in subsequent work. Therefore, there is an urgent need for a strength detection device for the fin frame. Summary of the Invention

[0003] In view of this, the present invention provides a strength detection device for a fin frame, which uses a pressing block and a positioning sleeve, combined with an electronic universal testing machine, to simulate the pressure received by the fin frame during the working process and detect the strength of the fin frame. Specifically, it is a strength detection device and a strength detection method for a fin frame.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A strength detection device for a fin frame, comprising:

[0006] A fin frame fixing assembly for fixing the fin frame workpiece during the detection process;

[0007] A fin frame detection assembly for applying pressure to the fin frame workpiece for detection;

[0008] A testing machine assembly connected to the fin frame detection assembly to provide power and record the magnitude of the pressure.

[0009] As a further improvement of the above technical solution:

[0010] As an optimized solution of the above technical solution, the fin frame fixing assembly includes a bottom plate, a locking assembly disposed above the bottom plate, and a positioning sleeve disposed within the locking assembly, and the fin frame workpiece is sleeved on the positioning sleeve.

[0011] As an optimized solution of the above technical solution, the locking assembly includes support blocks and locking rings disposed on the upper surfaces of the front and rear ends of the bottom plate. The upper ends of the support blocks are arc-shaped, the positioning sleeve is placed within the arc at the upper end of the support blocks, and both ends of the locking ring are connected to the left and right sides of the upper end surface of the support block for locking the positioning sleeve.

[0012] As an optimized solution of the above technical solution, a positioning pin is disposed at the lower end of the bottom plate for connection with the test workbench.

[0013] As an optimized solution of the above technical solution, fixing waist holes are provided on the bottom plate and fixedly connected to the test workbench through bolts.

[0014] As an optimized solution of the above technical solution, the fin frame detection assembly includes a connecting plate, pressing blocks arranged at the left and right ends of the connecting plate, and a connecting head arranged at the middle position of the connecting plate for connecting with the testing machine assembly.

[0015] As an optimized solution of the above technical solution, a fixing nut is screwed on the upper end of the connecting head for fixing the connecting head to the testing machine assembly.

[0016] As an optimized solution of the above technical solution, the lower end of the connecting head and the connecting plate are installed in an inserted manner and fixed by inserting a shaft pin.

[0017] As an optimized solution of the above technical solution, the testing machine assembly includes a testing machine press head and a testing machine pull rod. A vertical installation hole is provided at the lower end of the testing machine press head, a main insertion fixing hole is provided horizontally on the testing machine press head, an inserted fixing hole is provided above the connecting head, the connecting head is installed in the installation hole and connected by inserting the testing machine pull rod into the main insertion fixing hole and the inserted fixing hole, and the upper end of the testing machine press head is connected to an electronic universal testing machine.

[0018] The present invention also provides a method for detecting the strength of a fin frame, including the following steps:

[0019] Step1: The bottom plate is connected to the test workbench through a positioning pin and fixed to the bottom plate through screws and a plurality of fixing waist holes;

[0020] Step2: The fin frame workpiece is sleeved in the positioning sleeve and placed on the arc surface at the upper end of the support block, and the locking ring is connected to both ends of the support block through screws, thereby fixing the upper end of the positioning sleeve and completing the fixing of the fin frame workpiece;

[0021] Step3: Insert the connecting head into the middle hole of the connecting plate and complete the fixing by inserting a shaft pin;

[0022] Step4: Screw the fixing nut into the upper end of the connecting head, insert the upper end of the connecting head into the vertical installation hole at the lower end of the testing machine press head, and insert the testing machine pull rod into the horizontal main insertion fixing, so that the connecting head is connected to the testing machine press head. Reverse-rotate the fixing nut so that the fixing nut contacts the lower section of the testing machine press head, thereby stably connecting the connecting head and the testing machine press head without shaking;

[0023] Step 5: Start the electronic universal testing machine. The upper workbench of the electronic universal testing machine drives the pressure block to slowly press on the fin frame. The upper workbench of the electronic universal testing machine continuously increases the pressure on the pressure block and transmits the pressure to the fin frame.

[0024] Step 6: Continuously observe the pressure value of the electronic universal testing machine. When the pressure value of the electronic universal testing machine is equal to or slightly greater than the working pressure of the fin frame, stop pressurizing, maintain the pressure for the specified time, and visually inspect that the fin frame has no deformation or damage, indicating that the strength is qualified; otherwise, it is unqualified.

[0025] Step 7: After Step 5, conduct a failure strength test on the fin frame. When the pressure value rises to the working pressure of the fin frame, change to a small continuous pressure increase until the pressure value of the electronic universal testing machine fluctuates. This instantaneous change amount is the failure strength value of the fin frame.

[0026] Compared with the existing technology, the beneficial effects of the present invention are as follows:

[0027] The device provided by the present invention can accurately reproduce the stress state of the fin frame under actual working conditions, ensure that the test conditions are highly consistent with the real scenario, and the test results have more engineering reference value.

[0028] Secondly, the strength detection device for the fin frame with this structural form has a simple structure, reasonable layout, and convenient operation. It can quickly install and disassemble parts, simulate the pressure condition of the fin frame during the working process, and test the strength of the fin frame.

[0029] This detection device has a simple manufacturing process and low processing cost. It can visually distinguish under the specified load, ensure the morphological integrity of the parts after being subjected to pressure, the consistency of the assembly quality, and the reliability of the component performance, and is suitable for popularization and application in this field. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic three-dimensional structure diagram of the whole of the present invention;

[0031] Figure 2 It is a schematic front view sectional structure diagram of the workpiece with a fin frame of the present invention.

[0032] Figure 3 It is a schematic side view sectional structure diagram of the workpiece with a fin frame of the present invention.

[0033] In the figure: 1. Base plate; 2. Support block; 3. Locking ring; 4. Positioning sleeve; 5. Positioning pin; 6. Fixed waist hole; 7. Connecting plate; 8. Pressure block; 9. Connector; 10. Fixed nut; 11. Axle pin; 12. Testing machine indenter; 13. Testing machine pull rod; 14. Mounting hole; 15. Main insertion fixing hole; 16. Inserted fixing hole; 17. Electronic universal testing machine; 18. Fin frame workpiece. DETAILED DESCRIPTION OF THE INVENTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0035] In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] As shown in the attached Figure 1 to the attached Figure 3 figures, the technical solution of this embodiment mainly includes two parts: one is the fixing part of the fin frame workpiece 18; the other is the pressure detection part of the fin frame workpiece 18.

[0038] One. The fixing part of the fin frame workpiece 18

[0039] The fixing part of the fin frame workpiece 18 is mainly used to fix the fin frame workpiece 18 to facilitate subsequent detection. Therefore, its structure is specifically as follows: a bottom plate 1, whose main function is to connect with the test workbench. Therefore, positioning pins 5 are provided on the lower surface of the bottom plate 1. The positioning pins 5 ensure that the center of the detection device is consistent with the center of the testing machine, and then it is installed and fixed on the testing machine workbench. At the same time, a number of fixing waist holes 6 are provided at the front and rear ends of the bottom plate 1, and thus it is connected to the test workbench through bolts to achieve the fixing effect with the testing machine workbench.

[0040] At the front and rear ends of the upper surface of the bottom plate 1, support blocks 2 are vertically arranged. The upper ends of the support blocks 2 are arc-shaped. At the same time, other shapes can be adopted. The main purpose is to make the two ends of the positioning sleeve 4 have the same shape. If a square or special shape is adopted, the shape can be adjusted. At the same time, a locking ring 3 is screwed to the upper end of the support block 2 through bolts. The locking ring 3 and the upper end of the support block 2 form a fixed space. Therefore, a positioning sleeve 4 is placed between the locking ring 3 and the support block 2. By adjusting the screwing depth of the bolts at both ends of the locking ring 3, positioning sleeves 4 of different sizes can be adapted;

[0041] The positioning sleeve 4 is mainly used to sleeved into the fin frame workpiece 18. After being sleeved, the fin frame workpiece 18 should be symmetrical left and right in the horizontal direction.

[0042] II. Pressure detection part of the fin frame workpiece 18

[0043] The pressure detection part of the fin frame workpiece 18 is mainly used to apply pressure to the fin frame workpiece 18 and is connected to an electronic universal testing machine 17 (only a part is shown in the attached drawing. Since it is a prior art and is well-known to those skilled in the art). Therefore, its structure is as follows:

[0044] A connecting plate 7 is used for connecting and installing components. Therefore, pressing blocks 8 are arranged at the left and right ends of the connecting plate 7. The lower surface of the pressing block 8 faces the fins on both sides of the fin frame workpiece 18. A connecting head 9 is inserted and installed at the middle position of the pressing block 8. A shaft pin 11 is inserted into the connecting plate 7 to fix the connecting head 9;

[0045] A fixing nut 10 is screwed above the connecting head 9, and an inserted fixing hole 16 is provided. Its main function is that the upper end of the connecting head 9 is inserted into the mounting hole 14 on the lower surface of the testing machine indenter 12, and there is a main inserted fixing hole 15 in the horizontal direction of the testing machine indenter 12. A testing machine pull rod 13 is inserted through the main inserted fixing hole 15 and the inserted fixing hole 16, so that the connecting head 9 is connected to the testing machine indenter 12. At the same time, the fixing nut 10 is screwed in the reverse direction, so that the fixing nut 10 contacts the testing machine indenter 12 to achieve a fixing effect, and there is no shaking and the overall stability is good.

[0046] As can be seen from the above, the overall structure is relatively simple, the installation is fast, and it is convenient to detect the strength of the fin frame workpiece 18.

[0047] The use process of this technical solution is as follows:

[0048] Step 1: The bottom plate 1 is connected to the test workbench through a positioning pin 5 and fixed to the bottom plate 1 through screws and a plurality of fixing waist holes 6;

[0049] Step 2: Sleeved the fin frame workpiece 18 on the positioning sleeve 4, and placed it within the arc surface at the upper end of the support block 2. Then connect the locking ring 3 to both ends of the support block 2 with screws, thereby fixing the upper end of the positioning sleeve 4 and completing the fixation of the fin frame workpiece 18.

[0050] Step 3: Insert the connector 9 into the middle hole of the connecting plate 7, and complete the fixation after inserting the shaft pin 11.

[0051] Step 4: Thread the fixing nut 10 onto the upper end of the connector 9, insert the upper end of the connector 9 into the vertical mounting hole 14 at the lower end of the testing machine indenter 12, and insert the testing machine pull rod 13 horizontally for main insertion and fixation, so that the connector 9 is connected to the testing machine indenter 12. Reverse-rotate the fixing nut 10 so that the fixing nut 10 contacts the lower cross-section of the testing machine indenter 12, thereby stably connecting the connector 9 to the testing machine indenter 12 without wobbling.

[0052] Step 5: Start the electronic universal testing machine 17. The upper workbench of the electronic universal testing machine 17 drives the pressing block 8 to slowly press on the fin frame. The upper workbench of the electronic universal testing machine 17 continuously increases the pressure on the pressing block 8 and transmits the pressure to the fin frame.

[0053] Step 6: Continuously observe the pressure value of the electronic universal testing machine 17. When the pressure value of the electronic universal testing machine 17 is equal to or slightly greater than the working pressure of the fin frame, stop pressurizing, keep the pressure stable for the specified time, and visually inspect that the fin frame has no deformation or damage, indicating that the strength is qualified; otherwise, it is unqualified.

[0054] In this technical solution, the failure strength of the fin frame can also be detected.

[0055] After Step 5, when the pressure value rises to the working pressure of the fin frame, change to a small continuous pressure increase until the pressure value of the electronic universal testing machine 17 fluctuates. This instantaneous change amount is the failure strength value of the fin frame.

[0056] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A strength detection device for a tail wing frame, characterized in that: include: A tail wing frame fixing assembly, used for fixing the tail wing frame workpiece (18) during the inspection process; A tail frame detection assembly is used to provide pressure to the tail frame workpiece (18) for detection; The test machine assembly is connected to the tail wing frame detection assembly to provide power and record the pressure.

2. The strength detection device of the tail wing frame according to claim 1, characterized in that: The tail wing frame fixing assembly comprises a base plate (1), a locking assembly arranged above the base plate (1), and a positioning sleeve (4) arranged in the locking assembly, and the tail wing frame workpiece (18) is sleeved on the positioning sleeve (4).

3. The strength detection device of the tail wing frame according to claim 2, characterized in that: The locking assembly comprises a support block (2) and a locking ring (3) which are arranged on the upper surfaces of the front and rear ends of the base plate (1); the upper end of the support block (2) is in the shape of an arc, and the positioning sleeve (4) is placed in the arc at the upper end of the support block (2); the two ends of the locking ring (3) are connected to the left and right sides of the upper end surface of the support block (2) for locking the positioning sleeve (4).

4. The strength detection device of the tail wing frame according to claim 2, characterized in that: A positioning pin (5) is provided at the lower end of the base plate (1) for connecting to the test workbench.

5. The strength detection device of the tail wing frame according to claim 2, characterized in that: The bottom plate (1) is provided with a fixing waist hole (6) which is fixedly connected to the test workbench by bolts.

6. The strength detection device of the tail wing frame according to claim 1, characterized in that: The tail wing frame detection assembly comprises a connecting plate (7), pressure blocks (8) arranged at the left and right ends of the connecting plate (7), and a connecting head (9) arranged at the middle position of the connecting plate (7) for connecting to a testing machine assembly.

7. The strength detection device of the tail wing frame according to claim 6, characterized in that: A fixing nut (10) is threadedly connected to the upper end of the connecting head (9) and is used to fix the connecting head (9) to the testing machine component.

8. The strength detection device for the tail wing frame according to claim 6, characterized in that: The lower end of the connector (9) is installed in an inserting manner with the connecting plate (7), and is fixed by inserting an axle pin (11).

9. The strength detection device for the tail wing frame according to claim 6, characterized in that: The testing machine assembly comprises a testing machine pressure head (12) and a testing machine pull rod (13); a vertical mounting hole (14) is arranged at the lower end of the testing machine pressure head (12); a main insertion fixing hole (15) is arranged horizontally on the testing machine pressure head (12); an inserted fixing hole (16) is arranged above the connecting head (9); the connecting head (9) is installed in the mounting hole (14) and inserted into the main insertion fixing hole (15) and the inserted fixing hole (16) through the testing machine pull rod (13) to complete the connection; the upper end of the testing machine pressure head (12) is connected to an electronic universal testing machine (17).

10. A method for testing the strength of a tail wing frame, characterized in that: The following steps are involved: Step 1, the base plate (1) is connected to the test workbench through the positioning pins (5), and the base plate (1) is fixed through screws and a plurality of fixing waist holes (6); Step 2, sleeve the tail wing frame workpiece (18) into the positioning sleeve (4), and place it in the arc surface of the upper end of the support block (2), and connect the locking ring (3) and the two ends of the support block (2) by screws, thereby fixing the upper end of the positioning sleeve (4), and completing the fixing of the tail wing frame workpiece (18); Step 3, insert the connector (9) into the middle hole of the connecting plate (7), and fix it by inserting the axle pin (11); Step 4. Screw the fixing nut (10) into the upper end of the connecting head (9), and insert the upper end of the connecting head (9) into the vertical mounting hole (14) at the lower end of the testing machine pressure head (12), and insert the testing machine pull rod (13) into the horizontal main insertion fixation, so that the connecting head (9) is connected to the testing machine pressure head (12), and the fixing nut (10) is rotated in the reverse direction, so that the fixing nut (10) contacts the lower section of the testing machine pressure head (12), thereby the connecting head (9) and the testing machine pressure head (12) are stably connected without shaking; Step 5, start the electronic universal testing machine (17), the upper working table of the electronic universal testing machine (17) drives the pressing block (8) to slowly press on the tail wing frame, the upper working table of the electronic universal testing machine (17) continuously increases the pressure on the pressing block (8), and transmits the pressure to the tail wing frame; Step 6, continuously observe the pressure value of the electronic universal testing machine (17), when the pressure value of the electronic universal testing machine (17) is equal to or slightly greater than the working pressure of the tail wing frame, stop pressurizing, stabilize the pressure for a specified time, visually observe that the tail wing frame has no deformation damage, which means the strength is qualified, otherwise it is unqualified; Step 7, after Step 5, the failure strength of the tail wing frame is tested. When the pressure value rises to the working pressure of the tail wing frame, the pressure is increased continuously in a small amplitude until the pressure value of the electronic universal testing machine (17) fluctuates. The instantaneous change is the failure strength value of the tail wing frame.

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