Aviation thermoplastic bending property detection device and method

Abstract

The invention discloses an aviation thermoplastic bending performance detection device and method, the device comprises a base body, a temperature control mechanism is arranged above the base body to control the temperature of the environment of a detected sample, a supporting seat is arranged above the base body, the supporting seat is arranged to be bilaterally symmetrical about the center of the base body, and the supporting seat is arranged above the base body. The base body is used for supporting the left end and the right end of a detected sample, a bending and pressing mechanism is arranged above the base body and is used for carrying out a bending test on the detected sample, and an auxiliary resetting mechanism is arranged below the bending and pressing mechanism. According to the aviation thermoplastic bending property detection device, a temperature-adjustable detection environment is provided for a detected sample through the arrangement of the temperature control cover, the detected sample can be heated by heating the environment, and the detected sample is recovered to the original shape by matching with the auxiliary reset mechanism, so that the material state of the detected sample is better observed; and a clamping and locking mechanism capable of locking plastics with different shapes is arranged on the supporting seat, so that the application range of the device is widened.

Description

Technical Field

[0001] The present invention relates to the technical field of aviation thermoplastics detection, in particular to a device and method for detecting the bending properties of aviation thermoplastics. Background Art

[0002] To ensure that aviation thermoplastics meet subsequent performance requirements during manufacturing, their bending properties must be tested. By testing the plastic's bending changes and subsequent recovery capabilities, the plastic's applicable scenarios and usage environment can be determined. Currently, testing plastic bending properties generally involves applying pressure to the plastic and recording the changes.

[0003] Prior art 1 (application number CN202321314207.7, Chinese patent published on December 26, 2023) A plastic pipe heat bending resistance testing device, including a base plate, a support column is fixedly connected to the upper end of the base plate, a clamping mechanism is provided in the support column, the clamping mechanism is used to clamp and fix the plastic pipe, a protective cover is fixedly connected to the upper end of the base, a protective door is rotatably connected to the protective cover through a rotating shaft, explosion-proof glass is provided in the protective door, a guide column is fixedly connected to the protective cover, and a bending detection device is slidably connected to the circumferential surface of the guide column. This application controls the operation of an electric telescopic rod, which drives the sleeve upward at the delivery end of the electric telescopic rod, and the sleeve bends the pipe upward, thereby achieving the effect of testing the bending performance of the pipe. The detailed tensile force when the pipe is bent can be obtained through the action of a tension meter, making the data of the pipe bending performance test more accurate. Subsequently, by controlling the operation of the first motor, the first motor limits the installation block through the guide column, thereby achieving the effect of adjusting the position of the bending detection device, thereby achieving the effect of being able to perform bending tests at different positions of the plastic pipe, thereby improving the detection range of the equipment. Prior Art 2 (Application No. CN201920510845. 3. A Chinese patent published on April 24, 2020) A device for detecting the degree of bending of plastic pipe fittings, comprising a supporting base plate, support side plates are vertically and symmetrically arranged at both ends of the top of the supporting base plate, and support top plates are arranged on the tops of the two groups of support side plates, and support frames are symmetrically arranged at the lower ends of the inner side walls of the two groups of support side plates, and the inner ends of the two groups of support frames are provided with clamping mechanisms; the right end of the support frame is fixedly connected to a U-shaped support body, which is provided with a swinging gear disc and a rack mechanism, and a punch is provided at the lower end of the push rod, which can accurately apply force to the middle part of the plastic pipe fitting to be tested, making the detection process more unified and standardized, and the detection results more convincing.

[0004] Current detection devices are generally used to detect ordinary plastics. Thermoplastic plastics can recover after deformation when heated. Existing detection devices are not convenient for recovering the shape of plastics. The current detection method usually fixes the end of the plastic. When the sample being tested is compressed and deformed, it will generate a large tensile stress on the end, and will also cause the end of the sample being tested to undergo tensile deformation, affecting the bending detection effect. In addition, due to differences in shape and size of the samples being tested, the operation of a single limit mechanism is cumbersome and has a small scope of application. Summary of the Invention

[0005] The present invention aims to provide a device for testing the bending properties of aviation thermoplastics to address the challenges presented by the aforementioned background art. Current testing devices are typically designed for testing ordinary plastics. Since thermoplastics can recover after deformation due to heat, existing testing devices are not suitable for testing the recovery of plastics. Furthermore, due to differences in the shape and size of the tested samples, a single limiting mechanism is cumbersome to operate and has a limited scope of application.

[0006] To achieve the above object, the present invention provides the following technical solutions: A device for testing the bending performance of aviation thermoplastic plastics comprises a base, a temperature control mechanism is provided above the base for adjusting and controlling the testing temperature of the plastic, and a support seat is provided above the base, the support seat is symmetrically arranged about the center of the base to provide support for the left and right ends of the tested sample, and a bending pressing mechanism is provided above the base to perform a bending test on the tested sample, an auxiliary reset mechanism is provided below the bending pressing mechanism to assist in resetting the thermoplastic plastic after bending, a horizontal sliding structure is formed between the support seat and the base, and the tested sample drives the support seat to move adaptively when it is compressed and deformed, a mounting seat is provided above the support seat, and a clamping locking mechanism is provided on the inner side of the mounting seat, and the tested sample on the support seat is limited by the clamping locking mechanism, and a synchronous pressing mechanism is provided below the mounting seat to control the connection between the mounting seat and the support seat.

[0007] To further optimize this technical solution, the temperature control mechanism includes a temperature control cover and a protective door. The temperature control cover is arranged above the base body, a temperature control module is arranged inside the temperature control cover, and a protective door is arranged on the front side of the temperature control cover, and the protective door is made of transparent material.

[0008] To further optimize this technical solution, the bending and pressing mechanism includes a bending test block and a first telescopic push rod; The bending test block is arranged above the base, and the side of the bending test block is designed in an arc-shaped structure; The first telescopic push rod is fixed above the bending test block to control the movement of the bending test block.

[0009] Further optimizing the technical solution, the auxiliary reset mechanism includes a reset seat and a second telescopic push rod; A reset seat, arranged just below the bending test block; The second telescopic push rod is arranged below the reset seat to control the vertical movement of the reset seat.

[0010] To further optimize the technical solution, a guide seat is fixed above the base, the guide seat passes through the support seat and forms a sliding connection between the support seats, and balls are evenly distributed above the guide seat.

[0011] To further optimize the technical solution, a synchronous control mechanism is provided on the rear side of the support seat, and the support seats on the left and right sides above the base perform synchronous reverse movement under the action of the synchronous control mechanism.

[0012] Further optimizing this technical solution, the synchronous control mechanism includes a linkage plate, a transmission gear and a fixed block; The linkage plate is fixed on the rear side of the support seat, and the two sets of linkage plates are staggered in front and back; The transmission gear is arranged in the middle of the base body, and the transmission gear and the linkage plate are meshed and connected; The fixed block is fixed on the upper part of the base body. The transmission gear and the fixed block form a rotation connection. The linkage plate passes through the fixed block and forms a left-right sliding structure between the fixed blocks.

[0013] Further optimizing the technical solution, the clamping and locking mechanism includes a movable block, a first clamping surface, a second clamping surface, a movable shaft, a positioning groove, a positioning block and a return spring; A movable block is arranged on the inner side of the mounting seat; The first clamping surface is provided on the upper and lower sides of the movable block; The second clamping surface is provided on the left and right sides of the movable block; The movable shaft is installed at the front and rear ends of the movable block, and the movable block is rotatably connected to the mounting seat through the movable shaft; The positioning groove is opened on the surface of the movable block at equal angles with the center of the movable shaft as the center of the circle; The positioning block is connected to the positioning groove to position the movable block, and the end of the positioning block is designed in an arc shape; The return spring is connected to the positioning block to provide thrust for the positioning block, and a front-back sliding structure is formed between the positioning block and the mounting seat.

[0014] Further optimizing the technical solution, the synchronous pressing mechanism includes a mounting groove, a connecting groove, an extrusion block, a connecting head and a push-back mechanism; The mounting groove is provided above the support seat, and the mounting groove and the mounting seat form a nested connection; A connecting groove is provided below the mounting seat; The extrusion block is arranged inside and between the support base to form a front-to-rear sliding structure, and the rear side of the extrusion block is designed with an inclined structure. There are two groups of extrusion blocks, and the two groups of extrusion blocks are connected by a connecting plate to keep them moving synchronously; The connector is fixed to the front side of the extrusion block, and the front end of the connector passes through the front surface of the support seat, and the front end of the connector is designed to be an enlarged structure; The push-back mechanism is connected to the connector to control the movement of the connector.

[0015] Further optimizing this technical solution, the push-back mechanism includes a drive plate, a slide groove, a fixing seat, a control rod and a guide rod; A driving plate is arranged on the outside of the connector; The chute is provided inside the driving plate, and the connector is located inside the chute and forms a horizontal sliding connection between the chute; A fixing seat is provided on the rear side of the driving plate and is fixed above the base; A control rod passes through the driving plate and forms a threaded connection between the driving plate, and a rotational connection is formed between the control rod and the fixing seat; The guide rod is fixed on the front side of the fixing seat, and the guide rod passes through the driving plate and forms a front-to-back sliding structure.

[0016] A method for testing the bending properties of aviation thermoplastics, the method comprising: First, adjust the position of the support base according to the length of the plastic sample to be tested, change the horizontal spacing between the two groups of support bases, slide the support base along the guide base, remove the mounting base from the support base, and then place the sample on the support base so that the end of the sample is placed on the support base. Then install the mounting base on the support base. The mounting base is connected to the support base through the connecting groove. After the mounting base is inserted into the mounting groove, rotate the control rod to drive the driving plate to move. The driving plate drives the extrusion block to move through the connecting head. The extrusion block is inserted into the connecting groove, squeezing the connecting groove to drive the mounting base to move downward, so that the clamping surface on the movable block clamps the sample and presses the sample tightly. After the sample is fixed, the bending test block is controlled to move downward by the first telescopic push rod to extrude the sample and test its performance. After the bending test is completed, the sample is restored by thermoplasticity, the test environment is heated, and the reset seat is pushed upward by the second telescopic push rod to flatten the bent sample. At the same time, the support seat is adaptively moved outward. After completing the material inspection, the control rod is rotated in the opposite direction to control the drive plate to move forward. When the support seat moves, the connector will slide synchronously on the drive plate through the slide groove to release the extrusion limiting effect of the extrusion block on the connecting groove. Then the mounting seat is removed and the tested sample is removed from the support seat.

[0017] Compared with the prior art, the present invention has the following beneficial effects: (1) By setting up a temperature control cover, an adjustable temperature detection environment can be provided for the sample to be tested. The environment can be heated to heat the sample to be tested, and the auxiliary reset mechanism can be used to restore it to its original shape, so as to better observe the state of the sample to be tested. At the same time, a clamping and locking mechanism is set on the support seat, which can be applied to components of different shapes to increase the scope of application of the device.

[0018] (2) The support base is installed above the base, and the two groups of support bases can maintain synchronous opposite movement. On the one hand, the support length and end support position of the sample to be tested can be adjusted. On the other hand, the support base can move adaptively after the sample to be tested is compressed and deformed, so as to avoid the clamping part of the sample to be tested from being pulled off or deformed.

[0019] (3) A detachable connection is provided between the mounting base and the support base so that the mounting base can be disassembled and replaced. Different movable blocks can be used for different mounting bases, so that the device has more clamping surfaces, thereby providing a stable locking effect for samples of different shapes to be tested.

[0020] (4) The first clamping surface and the second clamping surface can be adjusted by rotating the movable block. The second clamping surface can be set to an arc structure with different curvatures, which can limit the position of tube-like samples of different sizes. At the same time, after the movable block is rotated, it can cooperate with the connection between the positioning block and the positioning groove to keep it in a stable state.

[0021] (5) The mounting base can be driven downward by squeezing the connecting groove through the squeezing block, so that the sample to be tested can be clamped, and the squeezing blocks in the two sets of support bases can be controlled to move synchronously through the drive plate, and the horizontal movement of the support base does not affect the movement of the drive plate, so that the two ends of the sample to be tested can be synchronously limited and locked, thereby improving the convenience of use of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the temperature control cover of the present invention; Figure 3 This is a schematic diagram of the top view of the substrate structure of the present invention; Figure 4 This is a schematic diagram of the rear view structure of the reset seat of the present invention; Figure 5 This is a schematic diagram of the three-dimensional structure of the support base of the present invention; Figure 6 This is a schematic diagram of the three-dimensional structure of the linkage plate of the present invention; Figure 7 This is a schematic diagram of the top view of the movable block of the present invention; Figure 8 This is a schematic diagram of the side cross-section structure of the mounting base of the present invention; Figure 9 This is a schematic diagram of the side cross-section structure of the support seat of the present invention; Figure 10 It is a schematic diagram of the top cross-sectional structure of the support seat of the present invention.

[0023] In the figure: 1. base; 2. temperature control cover; 3. protective door; 4. bending test block; 5. first telescopic push rod; 6. support seat; 7. guide seat; 8. linkage plate; 9. transmission gear; 10. fixed block; 11. mounting seat; 12. movable block; 13. first clamping surface; 14. second clamping surface; 15. movable shaft; 16. positioning groove; 17. positioning block; 18. reset spring; 19. mounting groove; 20. connecting groove; 21. extrusion block; 22. connecting plate; 23. connecting head; 24. driving plate; 25. slide groove; 26. fixed seat; 27. control rod; 28. guide rod; 29. ​​reset seat; 30. second telescopic push rod. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figures 1-10 , Embodiment 1: The present invention provides the following technical solutions: A device for testing the bending properties of aviation thermoplastics, comprising a base 1, a temperature control mechanism is provided above the base 1 to adjust and control the temperature of the sample to be tested, a support seat 6 is provided above the base 1, and the support seat 6 is symmetrically arranged with respect to the center of the base 1 to provide support for the left and right ends of the sample to be tested, a bending pressing mechanism is provided above the base 1 to perform a bending test on the sample to be tested, and an auxiliary reset mechanism is provided below the bending pressing mechanism to assist in resetting the sample to be tested after bending, the support seat 6 and the base A horizontal sliding structure is formed between the bodies 1. When the sample to be tested is compressed and deformed, the support seat 6 is driven to move adaptively. A mounting seat 11 is provided above the support seat 6. A clamping and locking mechanism is provided on the inner side of the mounting seat 11, which can limit the sample to be tested on the support seat 6, and a synchronous pressing mechanism is provided below the mounting seat 11 to control the connection between the mounting seat 11 and the support seat 6. The temperature control mechanism includes a temperature control cover 2 and a protective door 3. The temperature control cover 2 is provided above the base body 1, and a temperature control module is provided inside it, and a protective door 3 is provided on the front side of the temperature control cover 2, which is a transparent material.

[0026] During testing, the sample to be tested can be placed on the support seat 6. Before placement, the position of the support seat 6 can be adjusted according to the length of the sample, and the horizontal spacing between the two groups of support seats 6 can be changed. After the sample is placed, the mounting seat 11 is installed on the support seat 6 to limit and lock the sample. During testing, the test environment temperature can be adjusted through the temperature control module in the temperature control cover 2, and then the sample can be squeezed by the bending and pressing mechanism to observe its deformation.

[0027] Example 2: Based on Example 1, a bending downward pressing mechanism is disclosed, which includes a bending test block 4 and a first telescopic push rod 5. The bending test block 4 is arranged above the base 1, and the side of the bending test block 4 is designed with an arc-shaped structure. The first telescopic push rod 5 is fixed above the bending test block 4 and controls its movement. The auxiliary reset mechanism includes a reset seat 29 and a second telescopic push rod 30. The reset seat 29 is arranged just below the bending test block 4. The second telescopic push rod 30 is arranged below the reset seat 29 and controls its vertical movement. A guide seat 7 is fixed above the base 1. The guide seat 7 passes through the support seat 6 and is slidably connected thereto, and balls are evenly distributed above the guide seat 7. A synchronous control mechanism is provided on the rear side of the support seat 6. The support seats 6 on the left and right sides above the base 1 move synchronously in the opposite direction under the action of the synchronous control mechanism. The synchronous control mechanism includes a linkage plate 8, a transmission gear 9 and a fixed block 10. The linkage plate 8 is fixed to the rear side of the support seat 6. The two groups of linkage plates 8 are staggered front and back. The transmission gear 9 is arranged in the middle of the base 1, and the transmission gear 9 and the linkage plate 8 are meshed. The fixed block 10 is fixed above the base 1. The transmission gear 9 and the fixed block 10 are rotated. The linkage plate 8 passes through the fixed block 1 0 and the fixed block 10 form a left and right sliding structure, the clamping and locking mechanism includes a movable block 12, a first clamping surface 13, a second clamping surface 14, a movable shaft 15, a positioning groove 16, a positioning block 17 and a return spring 18, the movable block 12 is arranged on the inner side of the mounting seat 11, the first clamping surface 13 is arranged on the upper and lower sides of the movable block 12, the second clamping surface 14 is arranged on the left and right sides of the movable block 12, the movable shaft 15 is installed at the front and rear ends of the movable block 12, and the movable block 12 is rotatably connected with the mounting seat 11 through the movable shaft 15, the positioning groove 16 is opened on the surface of the movable block 12 at equal angles with the center of the movable shaft 15 as the center of the circle, the positioning block 17 is connected to the positioning groove 16 to position the movable block 12, and the end of the positioning block 17 is designed in an arc shape, the return spring 18 is connected to the positioning block 17 to provide thrust for the positioning block 17, and a front and rear sliding structure is formed between the positioning block 17 and the mounting seat 11.

[0028] The mounting seat 11 is connected to the support seat 6 through the connecting groove 20. Before placing the sample, the mounting seat 11 can be removed from the support seat 6, and the mounting seat 11 can be put back after the sample to be tested is placed. At the same time, the movable block 12 can be rotated and adjusted according to the sample shape, and the use of the first clamping surface 13 and the second clamping surface 14 can be adjusted. The clamping shapes of the first clamping surface 13 and the second clamping surface 14 are different, and can provide clamping for samples of different shapes. In addition, multiple groups of mounting seats 11 can be set, and each group of mounting seats 11 is equipped with different movable blocks 12 and clamping surfaces, which can achieve limit locking of more sample shapes. Subsequently, when the sample is pressed down for testing, the sample to be tested will bend and deform, and at the same time, it will drive the support seat 6 to move to adapt to the bending of the sample. When the sample needs to be restored by thermoplasticity later, the test environment can be heated, and the reset seat 29 can be pushed upward by the second telescopic push rod 30 to flatten the bent sample, and the support seat 6 can be adaptively moved outward.

[0029] Embodiment 3: Based on embodiment 2, a synchronous pressing mechanism is disclosed, including a mounting groove 19, a connecting groove 20, an extrusion block 21, a connecting head 23 and a push-back mechanism. The mounting groove 19 is provided above the support seat 6, and a nested connection is formed between the mounting groove 19 and the mounting seat 11. The connecting groove 20 is provided below the mounting seat 11. The extrusion block 21 is provided inside the support seat 6 and between the support seat 6 to form a front-to-back sliding structure, and the rear side of the extrusion block 21 is designed with an inclined structure, and two groups of extrusion blocks 21 are provided. The two groups of extrusion blocks 21 are connected by a connecting plate 22 to keep them moving synchronously. The connecting head 23 is fixed to the front side of the extrusion block 21, and the front end of the connecting head 23 passes through the front surface of the support seat 6, and the front end of the connecting head 23 is an enlarged structure. Design, the push-back mechanism is connected to the connecting head 23 to control the movement of the connecting head 23, and the push-back mechanism includes a driving plate 24, a slide 25, a fixed seat 26, a control rod 27 and a guide rod 28. The driving plate 24 is arranged on the outside of the connecting head 23, the slide 25 is opened inside the driving plate 24, the connecting head 23 is located inside the slide 25 and the slide 25 forms a horizontal sliding connection, the fixed seat 26 is arranged on the rear side of the driving plate 24, and the fixed seat 26 is fixed above the base 1, the control rod 27 passes through the driving plate 24 and the driving plate 24 to form a threaded connection, and the control rod 27 and the fixed seat 26 form a rotating connection, the guide rod 28 is fixed on the front side of the fixed seat 26, and the guide rod 28 passes through the driving plate 24 and the driving plate 24 to form a front and rear sliding structure.

[0030] After the mounting base 11 is inserted into the mounting groove 19, the control rod 27 can be rotated to drive the driving plate 24 to move. The driving plate 24 drives the squeezing block 21 to move through the connecting head 23. The squeezing block 21 is inserted into the connecting groove 20, squeezing the connecting groove 20, and driving the mounting base 11 to move downward, so that the clamping surface on the movable block 12 clamps the sample and presses the sample. When the fixation needs to be released later, the control rod 27 can be rotated in the opposite direction to control the driving plate 24 to move forward. When the support base 6 moves, the connecting head 23 will slide synchronously on the driving plate 24 through the slide groove 25.

[0031] The present invention also provides a method for testing the bending properties of aviation thermoplastics, comprising: First, adjust the position of the support base 6 according to the length of the plastic sample to be tested, change the horizontal spacing between the two groups of support bases 6, slide the support base 6 along the guide base 7, remove the mounting base 11 from the support base 6, and then place the sample on the support base 6 so that the end of the sample is mounted on the support base 6, and then install the mounting base 11 on the support base 6. The mounting base 11 is connected to the support base 6 through the connecting groove 20. After the mounting base 11 is inserted into the mounting groove 19, the control rod 27 is rotated to drive the driving plate 24 to move. The driving plate 24 drives the extrusion block 21 to move through the connecting head 23. The extrusion block 21 is inserted into the connecting groove 20, squeezing the connecting groove 20, driving the mounting base 11 to move downward, so that the clamping surface on the movable block 12 clamps the sample and presses the sample tightly; After the sample is fixed, the bending test block 4 is controlled to move downward by the first telescopic push rod 5 to extrude the sample and test its performance. After the bending test is completed, the sample is restored by thermoplasticity, the test environment is heated, and the reset seat 29 is pushed upward by the second telescopic push rod 30 to flatten the bent sample. At the same time, the support seat 6 is adaptively moved outward. After completing the material inspection, the control rod 27 is rotated in the opposite direction to control the drive plate 24 to move forward. When the support seat 6 moves, the connecting head 23 will slide synchronously on the drive plate 24 through the slide groove 25, releasing the extrusion limiting effect of the extrusion block 21 on the connecting groove 20, and then the mounting seat 11 is removed, and the tested sample is removed from the support seat 6.

[0032] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for testing the bending properties of aviation thermoplastics, comprising a substrate (1); Its characteristics are: A temperature control mechanism is provided above the base (1) to adjust and control the detection environment temperature of the detected sample, and a support seat (6) is provided above the base (1), and the support seat (6) is symmetrically arranged about the center of the base (1) to provide support for the left and right ends of the detected sample, and a bending and pressing mechanism is provided above the base (1) to perform a bending test on the detected sample, and an auxiliary reset mechanism is provided below the bending and pressing mechanism to assist the thermoplastic plastic to reset after bending. A horizontal sliding structure is formed between the support seat (6) and the base (1), and the detected sample drives the support seat (6) to move adaptively when it is compressed and deformed. A mounting seat (11) is provided above the support seat (6), and a clamping and locking mechanism is provided on the inner side of the mounting seat (11), and the detected sample on the support seat (6) is limited by the clamping and locking mechanism, and a synchronous pressing mechanism is provided below the mounting seat (11) to control the connection between the mounting seat (11) and the support seat (6).

2. The device for testing the bending properties of aviation thermoplastics according to claim 1, characterized in that: The temperature control mechanism comprises a temperature control cover (2) and a protective door (3); the temperature control cover (2) is arranged above the base (1); a temperature control module is arranged inside the temperature control cover (2); and a protective door (3) is arranged on the front side of the temperature control cover (2); the protective door (3) is made of a transparent material.

3. The device for testing the bending properties of aviation thermoplastics according to claim 1, characterized in that: The bending and pressing mechanism comprises a bending test block (4) and a first telescopic push rod (5); A bending test block (4) is arranged above the base (1), and the contact surface between the bending test block (4) and the sample to be tested is designed to be in an arc-shaped structure; The first telescopic push rod (5) is fixed above the bending test block (4) and controls its movement.

4. The device for testing the bending properties of aviation thermoplastics according to claim 3, characterized in that: The auxiliary reset mechanism comprises a reset seat (29) and a second telescopic push rod (30); A reset seat (29) is arranged directly below the bending test block (4); The second telescopic push rod (30) is arranged below the reset seat (29) and controls its vertical movement.

5. The device for testing the bending properties of aviation thermoplastics according to claim 1, characterized in that: A guide seat (7) is fixed above the base (1), the guide seat (7) passes through the support seat (6) and is in sliding connection therewith, and balls are evenly distributed above the guide seat (7).

6. The device for testing the bending properties of aviation thermoplastics according to claim 6, characterized in that: A synchronous control mechanism is provided on the rear side of the support seat (6), and the support seats (6) on the left and right sides above the base (1) move synchronously in the opposite direction under the action of the synchronous control mechanism; The synchronous control mechanism comprises a linkage plate (8), a transmission gear (9) and a fixed block (10); The linkage plates (8) are fixed to the rear side of the support seat (6), and the two sets of linkage plates (8) are staggered in front and back; A transmission gear (9) is arranged in the middle of the base (1), and a meshing connection is formed between the transmission gear (9) and the linkage plate (8); The fixed block (10) is fixed above the base (1), and a rotation connection is formed between the transmission gear (9) and the fixed block (10). The linkage plate (8) passes through the fixed block (10) and forms a left-right sliding structure with it.

7. The device for testing the bending properties of aviation thermoplastics according to claim 1, characterized in that: The clamping and locking mechanism comprises a movable block (12), a first clamping surface (13), a second clamping surface (14), a movable shaft (15), a positioning groove (16), a positioning block (17) and a return spring (18); A movable block (12) is arranged on the inner side of the mounting seat (11); A first clamping surface (13) is provided on the upper side of the movable block (12), and the first clamping surface (13) is a V-shaped clamping surface; The second clamping surface (14) is provided on the left and right sides of the movable block (12); the second clamping surface (14) is an arc-shaped clamping surface; A movable shaft (15) is mounted on the front and rear ends of the movable block (12), and the movable block (12) passes through the movable shaft (15) and is rotatably connected to the mounting seat (11); A positioning groove (16) is provided on the surface of the movable block (12) at equal angles with the center of the movable shaft (15) as the center of the circle; A positioning block (17) is connected to the positioning groove (16) to position the movable block (12), and the end of the positioning block (17) is designed to be an arc-shaped structure; The return spring (18) is connected to the positioning block (17) to provide a thrust for the positioning block (17). A front-to-back sliding structure is formed between the positioning block (17) and the mounting seat (11).

8. The device for testing the bending properties of aviation thermoplastics according to claim 1 or 7, characterized in that: The synchronous pressing mechanism comprises a mounting groove (19), a connecting groove (20), an extrusion block (21), a connecting head (23) and a push-back mechanism; The mounting groove (19) is provided above the support seat (6), and the mounting groove (19) and the mounting seat (11) form a nested connection; A connecting groove (20) is provided below the mounting seat (11); An extrusion block (21) is arranged inside the support seat (6) and forms a front-to-rear sliding structure therewith. The rear side of the extrusion block (21) is designed in an inclined structure. Two groups of extrusion blocks (21) are provided, and the two groups are connected by a connecting plate (22) so as to maintain synchronous movement. A connector (23) is fixed to the front side of the extrusion block (21), and the front end of the connector (23) passes through the front surface of the support seat (6), and the front end of the connector (23) is a convex structure; The push-back mechanism is connected to the connector (23) and controls its movement.

9. The device for testing the bending properties of aviation thermoplastics according to claim 8, characterized in that: The push-back mechanism comprises a drive plate (24), a slide groove (25), a fixing seat (26), a control rod (27) and a guide rod (28); A drive plate (24) is arranged on the outside of the connector (23); The chute (25) is provided inside the driving plate (24), and the connector (23) is located inside the chute (25) and forms a horizontal sliding connection between the chute (25); A fixing seat (26) is provided on the rear side of the driving plate (24), and the fixing seat (26) is fixed above the base (1); A control rod (27) passes through the drive plate (24) and is threadedly connected thereto, and a rotational connection is formed between the control rod (27) and the fixed seat (26); The guide rod (28) is fixed on the front side of the fixing seat (26), and the guide rod (28) passes through the driving plate (24) and forms a front-to-back sliding structure with the driving plate (24).

10. A method for testing the bending properties of aviation thermoplastics, the method being implemented using the apparatus according to any one of claims 1 to 9, characterized in that: The method comprises: First, adjust the position of the support base 6 according to the length of the plastic sample to be tested, change the horizontal spacing between the two groups of support bases 6, slide the support base 6 along the guide base 7, remove the mounting base 11 from the support base 6, and then place the sample on the support base 6 so that the end of the sample is mounted on the support base 6, and then install the mounting base 11 on the support base 6. The mounting base 11 is connected to the support base 6 through the connecting groove 20. After the mounting base 11 is inserted into the mounting groove 19, the control rod 27 is rotated to drive the driving plate 24 to move. The driving plate 24 drives the extrusion block 21 to move through the connecting head 23. The extrusion block 21 is inserted into the connecting groove 20, squeezing the connecting groove 20, driving the mounting base 11 to move downward, so that the clamping surface on the movable block 12 clamps the sample and presses the sample tightly; After the sample is fixed, the bending test block 4 is controlled to move downward by the first telescopic push rod 5 to extrude the sample and test its performance. After the bending test is completed, the sample is restored by thermoplasticity, the test environment is heated, and the reset seat 29 is pushed upward by the second telescopic push rod 30 to flatten the bent sample. At the same time, the support seat 6 is adaptively moved outward. After completing the material inspection, the control rod 27 is rotated in the opposite direction to control the drive plate 24 to move forward. When the support seat 6 moves, the connecting head 23 will slide synchronously on the drive plate 24 through the slide groove 25, releasing the extrusion limiting effect of the extrusion block 21 on the connecting groove 20, and then the mounting seat 11 is removed, and the tested sample is removed from the support seat 6.

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