Peeling test device for detecting fiber metal layer composite plate

Abstract

The invention relates to the technical field of stripping detection of composite plates, in particular to a stripping test device for detecting a fiber metal layer composite plate. Comprising a supporting base, a first guide rail is installed on the top of the supporting base, a first sliding frame is slidably arranged on the first guide rail, a lead screw motor is installed on the first guide rail, and a lead screw of the lead screw motor is in threaded connection with the first sliding frame. By arranging the rotating mechanism composed of the first motor, the gear and the fan-shaped rack, the second guide rail, the second sliding frame and the second clamp can be driven to integrally and stably rotate, so that continuous adjustment of a sample clamping angle is realized, and the design breaks through the limitation that a traditional stripping test device only supports a fixed angle; according to the method, the non-fixed angle composite load possibly borne by the fiber metal layer composite plate in actual service can be simulated, the bonding performance and the failure behavior of an interface of the fiber metal layer composite plate in a multi-axial stress state are comprehensively evaluated, and the testing flexibility, the application range and the engineering reference value are remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of composite board detection peeling, and particularly relates to a peeling test device for fiber metal laminates composite board detection. BACKGROUND

[0002] As an advanced lightweight high-strength composite material, fiber metal laminates have been widely used in aerospace, rail transportation, shipbuilding and high-end automobiles, etc. due to their high toughness, impact resistance, high specific strength, high specific modulus, excellent fatigue resistance and corrosion resistance. Such materials are usually composed of alternating metal sheets and fiber reinforced resin layers by hot pressing and curing process. The excellent comprehensive performance of the material depends largely on the bonding quality of the interface between the layers. Therefore, accurate evaluation of the interfacial adhesion strength and its failure behavior under different load conditions is of great significance for the design optimization, process improvement and service life prediction of the composite board.

[0003] Peeling test is one of the most common and direct mechanical test methods for evaluating the interfacial adhesion performance of fiber metal laminates. The basic principle is that one end of the fiber layer of the sample is pre-peeled, then the pre-peeled fiber layer is turned over 180 degrees and clamped in the upper clamp, and the metal layer of the sample is fixed in the lower clamp. When the testing machine is running, it is equivalent to continuously pulling the peeled "fiber layer" away from the metal layer, and the peeling data during this process is measured. Based on the measured data, the uniformity, stability and failure mode of the interfacial adhesion can be comprehensively evaluated. At present, the standardized peeling test is mainly classified according to different peeling angles, including 180° peeling test and 90° peeling test, etc. However, as a typical heterogeneous multilayer material system, the interface of fiber metal laminates may be subjected to complex angle composite loads during actual service. Single fixed angle peeling test cannot fully reflect the interfacial response characteristics under multi-axial stress state. The existing test devices generally only support the above standard angles, lack the ability to continuously adjust the peeling angle, limit the multidimensional study of interfacial mechanical behavior, and cannot meet the demand of interface performance evaluation of new fiber metal laminates under complex working conditions. SUMMARY

[0004] Therefore, the present application provides a peeling test device for fiber metal laminates composite board detection, which can solve the problem of the lack of continuous adjustable peeling angle in the existing peeling test device, which limits the multidimensional study of interfacial mechanical behavior and cannot meet the demand of interface performance evaluation of new fiber metal laminates under complex working conditions.

[0005] The technical scheme of the present application is: a kind of fiber metal layer composite board detection is peeled off test device, including support seat, first guide rail is installed on the top of support seat, first sliding frame is slidably arranged on first guide rail, screw rod motor is installed on first guide rail, the screw rod of screw rod motor is connected with first sliding frame by screwing, first clamp for clamping fiber layer is installed on first sliding frame, fixed frame is installed on support seat, sector gear is rotatably arranged on fixed frame, rotating mechanism is arranged on fixed frame, rotating mechanism is used to drive sector gear to rotate, second guide rail is installed on sector gear, second sliding frame is slidably arranged on second guide rail, first spring is connected between second sliding frame and second guide rail, second clamp for clamping metal layer is installed on second sliding frame, connecting rope is connected between first sliding frame and second sliding frame, guide mechanism for guiding connecting rope is installed on first guide rail.

[0006] As a preferred technical scheme of the present application, the rotating mechanism includes a first motor and a gear, the first motor is installed on the fixed frame, the output shaft of the first motor is connected with the gear, and the gear is engaged with the sector gear.

[0007] As a preferred technical scheme of the present application, the guide mechanism includes a guide wheel, a connecting frame and a limiting wheel, the guide wheel for guiding the connecting rope is rotatably installed on the second guide rail, the connecting frame is installed on the first guide rail, and the limiting wheel is rotatably connected to the connecting frame.

[0008] As a preferred technical scheme of the present application, it further includes a detection mechanism, the detection mechanism includes a vision sensor and a control box, the vision sensor and the control box are installed on the second guide rail, and the vision sensor is used to detect the posture of the fiber layer.

[0009] As a preferred technical scheme of the present application, it further includes a centering mechanism, the centering mechanism includes a centering rod, a bidirectional screw rod, a transmission member and a second motor, the centering rod is slidably arranged on the second sliding frame, two bidirectional screw rods are rotatably arranged on the second sliding frame, the centering rods on both sides are respectively screwed with the two ends of the bidirectional screw rods, the transmission member is arranged between the ends of the two bidirectional screw rods, the transmission member is used for transmission between the two bidirectional screw rods, the second motor is installed on the side surface of the second sliding frame, and the output shaft of the second motor is connected with one of the bidirectional screw rods.

[0010] As a preferred technical scheme of the present application, it further includes a protective sleeve, the protective sleeve is installed on the centering rod, and the protective sleeve is used to protect the sample.

[0011] As a preferred technical scheme of the present application, the limiting mechanism is further provided, which comprises a connecting plate, a rotating rod, a roller, a second spring, a mounting frame, a clamping block and a third spring, the connecting plate is mounted on the second guide rail, the rotating rod is rotatably arranged on the connecting plate, the roller is rotatably arranged on the rotating rod, the roller is used for limiting the sample, the second spring is connected between the rotating rod and the second guide rail, the mounting frame is further mounted on the second guide rail, the clamping block is slidably arranged on the mounting frame, the clamping block is used for limiting the rotating rod, and the third spring is connected between the clamping block and the mounting frame.

[0012] As a preferred technical scheme of the present application, the folding plate is further provided, which is connected between the first sliding frame and the first guide rail, and is used for shielding the inner side of the first guide rail.

[0013] Beneficial effects: 1. The rotating mechanism composed of the first motor, the gear and the sector rack is arranged, so that the second guide rail, the second sliding frame and the second clamp can be driven to stably rotate as a whole, so that the continuous adjustment of the clamping angle of the sample is realized. This design breaks through the limitation of the traditional peeling test device which only supports fixed angle, can simulate the non-fixed angle composite load that the fiber metal laminated plate may bear in actual service, comprehensively evaluates the bonding performance and failure behavior of the interface under multi-axial stress state, and significantly improves the flexibility, application range and engineering reference value of the test.

[0014] 2. The first sliding frame and the second sliding frame are flexibly connected by the connecting rope, and the reset action of the first spring is matched, so that in the peeling process, when the upper clamp drives the fiber layer to move upward, the second sliding frame is pulled along the second guide rail through the connecting rope, so that the second clamp clamping the metal layer is synchronously adjusted in position, so that the spatial position of the peeling point is dynamically maintained unchanged. This mechanism effectively avoids the problem that the peeling angle changes due to the movement of the clamp, ensures the stability of the peeling angle in the whole test process, and improves the accuracy and repeatability of the test data.

[0015] 3. The detection mechanism composed of the visual sensor and the control box is provided, which can monitor the posture of the fiber layer peeling section and intuitively feedback through the display, so that the operator can accurately adjust; at the same time, the centering mechanism driven by the bidirectional screw rod, the centering rod and the second motor is provided, which can automatically adjust the transverse position and inclination of the sample in the clamp, ensure that the sample is clamped vertically and centered, reduce human error, improve the consistency and efficiency of clamping, and lay a foundation for obtaining reliable test results. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present application.

[0017] Figure 2 It is a schematic diagram of the three-dimensional structure of the screw rod motor, the first clamp and the fixing frame of the present application.

[0018] Figure 3 It is the perspective structural schematic view of the rotating mechanism of the application.

[0019] Figure 4 It is the perspective structural schematic view of the second sliding frame, the first spring and the second clamp of the application.

[0020] Figure 5 It is the perspective structural schematic view of the guiding mechanism of the application.

[0021] Figure 6 It is the perspective structural schematic view of the connecting frame and the limiting wheel of the application.

[0022] Figure 7 It is the perspective structural schematic view of the detecting mechanism of the application.

[0023] Figure 8 It is the perspective structural schematic view of the centering mechanism of the application.

[0024] Figure 9 It is the perspective structural schematic view of the centering rod, the bidirectional screw rod and the protective sleeve of the application.

[0025] Figure 10 It is the perspective structural schematic view of the limiting mechanism of the application.

[0026] Figure 11 It is the perspective structural schematic view of the mounting frame, the clamping block and the third spring of the application.

[0027] Marked in the figure: 1 - support seat, 101 - metal layer, 102 - fiber layer, 2 - first guide rail, 3 - first sliding frame, 4 - screw rod motor, 5 - first clamp, 6 - fixed frame, 7 - fan-shaped rack, 801 - first motor, 802 - gear, 9 - second guide rail, 10 - second sliding frame, 11 - first spring, 12 - second clamp, 13 - connecting rope, 1401 - guide wheel, 1402 - connecting frame, 1403 - limiting wheel, 1501 - visual sensor, 1502 - control box, 16 - centering rod, 17 - bidirectional screw rod, 18 - transmission part, 19 - second motor, 20 - protective sleeve, 21 - connecting plate, 22 - rotating rod, 23 - roller, 24 - second spring, 25 - mounting frame, 26 - clamping block, 27 - third spring, 28 - folding plate. DETAILED DESCRIPTION

[0028] The application will be described in detail below in combination with the drawings and specific embodiments, but not as the limitation of the application.

[0029] Embodiment: a kind of fiber metal layer composite board detection is stripped with test device, refer to Figures 1-7As shown, the device includes a support base 1; it also includes a first guide rail 2, a first sliding frame 3, a lead screw motor 4, a first clamp 5, a fixing frame 6, a sector rack 7, a rotating mechanism, a second guide rail 9, a second sliding frame 10, a first spring 11, a second clamp 12, a connecting rope 13, and a guiding mechanism; the first guide rail 2 is mounted on the top of the support base 1; the first sliding frame 3 is slidably mounted on the first guide rail 2; the lead screw motor 4 is mounted on the top of the first guide rail 2, and the lead screw of the lead screw motor 4 is threadedly connected to the first sliding frame 3, and the lead screw motor 4 is used to drive the first sliding frame 3 to move up and down; the first clamp 5 is mounted on the first sliding frame 3, and the first clamp 5 is used to clamp the fiber layer 102 of the sample; the top of the support base 1 is mounted with... A fixed frame 6 is located in front of the first guide rail 2; a sector rack 7 is rotatably mounted on the upper side of the fixed frame 6; a rotating mechanism is provided on the fixed frame 6 to drive the sector rack 7 to rotate; a second guide rail 9 is mounted on the front side of the sector rack 7; a second sliding frame 10 is slidably mounted on the second guide rail 9; two first springs 11 are connected between the bottom of the second sliding frame 10 and the bottom of the second guide rail 9; a second clamp 12 is mounted on the upper left side of the second sliding frame 10 to clamp the metal layer 101 of the sample; a connecting rope 13 is connected between the upper side of the first sliding frame 3 and the bottom of the second sliding frame 10; a guiding mechanism for guiding the connecting rope 13 is mounted on the first guide rail 2.

[0030] See Figure 3 As shown, the rotating mechanism includes a first motor 801 and a gear 802; the first motor 801 is mounted on the lower side of the fixed frame 6; the gear 802 is connected to the output shaft of the first motor 801, and the gear 802 meshes with the sector rack 7.

[0031] See Figure 5 and Figure 6 As shown, the guiding mechanism includes a guide wheel 1401, a connecting frame 1402, and a limiting wheel 1403; the guide wheel 1401 is rotatably mounted on the lower side of the second guide rail 9, and the connecting rope 13 passes under the guide wheel 1401. The guide wheel 1401 is used to guide the connecting rope 13; the connecting frame 1402 is mounted on the lower left side of the first guide rail 2; two limiting wheels 1403 are rotatably connected to the front side of the connecting frame 1402, and the connecting rope 13 passes between the two limiting wheels 1403. The limiting wheels 1403 are used to limit the connecting rope 13. The position between the two limiting wheels 1403 and the hinge point between the fixing frame 6 and the fan-shaped rack 7 are on the same straight line.

[0032] See Figure 7As shown, the detection mechanism further comprises a vision sensor 1501 and a control box 1502; the vision sensor 1501 is mounted on the left upper side of the second guide rail 9 and is used to detect the posture of the fiber layer 102; the control box 1502 is mounted on the top of the second guide rail 9; the vision sensor 1501 is electrically connected with the control box 1502; the control box 1502 can be electrically connected with a display; the control box 1502 can display information through the display so as to be observed by an operator.

[0033] Referring to Figure 8 and Figure 9 As shown, the centering mechanism further comprises a centering rod 16, a bidirectional screw rod 17, a transmission member 18 and a second motor 19; the centering rod 16 is symmetrically and slidably arranged on the left lower side of the second sliding frame 10; the number of the centering rod 16 is four; the two bidirectional screw rods 17 are rotatably arranged on the left lower side of the second sliding frame 10; the two bidirectional screw rods 17 are distributed in an up-down manner; the front two centering rods 16 are respectively threadedly connected with the front ends of the two bidirectional screw rods 17; the rear two centering rods 16 are respectively threadedly connected with the rear ends of the two bidirectional screw rods 17; the transmission member 18 comprises a synchronous wheel and a synchronous belt; the rear end of each of the two bidirectional screw rods 17 is provided with a synchronous wheel; the synchronous belt is wound between the two synchronous wheels; the synchronous wheel and the synchronous belt are used for transmission between the two bidirectional screw rods 17; the second motor 19 is mounted on the front lower side of the second sliding frame 10; the output shaft of the second motor 19 is connected with the front end of the upper bidirectional screw rod 17.

[0034] In use, first, a part of the fiber layer 102 of a sample is separated from the metal layer 101 (the sample is composed of the fiber layer 102 and the metal layer 101); then, the upper end of the sample metal layer 101 is placed into the clamping area of the second clamp 12 and the sample is located between the front and rear centering rods 16; then, the upper bidirectional screw rod 17 is driven to rotate by the second motor 19, so as to drive the lower bidirectional screw rod 17 to rotate through the transmission member 18, so that the bidirectional screw rod 17 drives the front and rear centering rods 16 to approach each other, so as to drive the sample to be centered by the front and rear centering rods 16, so as to adjust the position and the inclination of the sample and ensure that the sample is in a vertical ground state; after the sample is adjusted, the second clamp 12 clamps the upper end of the metal layer 101, so as to clamp the metal layer 101; then, the upper bidirectional screw rod 17 is driven to reverse by the second motor 19, so as to drive the lower bidirectional screw rod 17 to reverse through the transmission member 18, so that the bidirectional screw rod 17 drives the front and rear centering rods 16 to move away from each other and reset; then, the separated part of the fiber layer 102 is bent upwards; the end of the separated part of the fiber layer 102 is placed into the clamping area of the first clamp 5 (as shown in FIG. 1B). Figure 7As shown in the figure, the operator can know the inclination of the separated part of the fiber layer 102 according to the detection result, and adjust the inclination of the separated part of the fiber layer 102 by fine adjustment, until the separated part of the fiber layer 102 is perpendicular to the ground, then the first clamp 5 clamps the end of the separated part of the fiber layer 102, thus the preparation of the sample is completed.

[0035] Then, the angle of the peeling test is adjusted according to the requirement, the first motor 801 drives the gear 802 to rotate counterclockwise, the gear 802 drives the sector rack 7 to rotate clockwise, thus the second guide rail 9, the second sliding frame 10 and the second clamp 12 rotate clockwise, and the sample rotates clockwise, so as to adjust the angle of the peeling test, until the angle of the peeling test is adjusted to the required angle, then the first sliding frame 3 moves up driven by the lead screw motor 4, the first sliding frame 3 drives the first clamp 5 to move up, thus the first clamp 5 pulls the separated part of the fiber layer 102 up, and the peeling test of the sample is carried out, at the same time, the first sliding frame 3 pulls the second sliding frame 10 to move to the side close to the guide wheel 1401 through the connecting rope 13, the first spring 11 is compressed, thus the second clamp 12 and the sample move to the side close to the guide wheel 1401 driven by the second clamp 12, so as to adjust the position of the peeling point (the peeling point is the point where the fiber layer 102 separates from the metal layer 101), to ensure that the position of the peeling point is unchanged, so as to ensure that the angle of the peeling test is always at the required angle; after the peeling test of the sample is completed, the first sliding frame 3 moves down to reset driven by the lead screw motor 4, the first sliding frame 3 drives the first clamp 5 to move down to reset, and the first sliding frame 3 releases the connecting rope 13, so that the first spring 11 returns to the original state, thus the first spring 11 drives the second sliding frame 10 to move to the side away from the guide wheel 1401 to reset, thus the second clamp 12 moves to the side away from the guide wheel 1401 to reset driven by the second clamp 12, and the second sliding frame 10 straightens the connecting rope 13, then the first clamp 5 and the second clamp 12 are controlled to release the fiber layer 102 and the metal layer 101 respectively, and the fiber layer 102 and the metal layer 101 are taken off, finally the first motor 801 drives the gear 802 to rotate clockwise to reset, the gear 802 drives the sector rack 7 to rotate counterclockwise to reset, thus the second guide rail 9, the second sliding frame 10 and the second clamp 12 rotate counterclockwise to reset.

[0036] Referring to Figure 9 As shown in the figure, the four central rods 16 are provided with protective sleeves 20 at the left ends, and the protective sleeves 20 are used for protecting the sample.

[0037] When the centering rod 16 is used to center the sample, the protective sleeve 20 can prevent the centering rod 16 from leaving marks on the surface of the sample, thereby protecting the surface of the sample.

[0038] Referring to Figure 10 and Figure 11 Further, as shown in , the limiting mechanism comprises a connecting plate 21, a rotating rod 22, a roller 23, a second spring 24, a mounting bracket 25, a clamping block 26, and a third spring 27. The connecting plate 21 is installed on the left upper front side of the second guide rail 9. The rotating rod 22 is rotatably arranged on the connecting plate 21. The roller 23 is rotatably arranged at the lower end of the rotating rod 22, and is used to limit the sample. The second spring 24 is connected between the right upper side of the rotating rod 22 and the left upper front side of the second guide rail 9. The mounting bracket 25 is installed on the front upper side of the second guide rail 9. The clamping block 26 is slidably arranged on the rear lower side of the mounting bracket 25, and is used to limit the rotating rod 22. The left rear side of the clamping block 26 is inclined, so that the rotating rod 22 can move by pressing the clamping block 26 through the inclined surface. Two third springs 27 are connected between the front side of the clamping block 26 and the mounting bracket 25.

[0039] When the upper end of the metal layer 101 is clamped by the second clamp 12, the rotating rod 22 is pulled counterclockwise, the second spring 24 is compressed, the rotating rod 22 drives the roller 23 to contact the sample, when the rotating rod 22 contacts the inclined surface of the clamping block 26, the rotating rod 22 will press the clamping block 26 to move forward, the third spring 27 is compressed, when the rotating rod 22 passes the clamping block 26, the third spring 27 returns to its original state, the third spring 27 drives the clamping block 26 to move backward to reset, so that the clamping block 26 clamps the rotating rod 22, thereby limiting the rotating rod 22 and the roller 23 (as shown in Figure 10 ). In this way, by contacting the sample with the roller 23, the sample can be limited by the roller 23, preventing the sample from arching and affecting the data of the sample peeling test. After the sample completes the peeling test, the clamping block 26 is pulled forward again, the third spring 27 is compressed, the clamping block 26 releases the rotating rod 22, when the clamping block 26 releases the rotating rod 22, the second spring 24 returns to its original state, the second spring 24 drives the rotating rod 22 to rotate clockwise to reset, thereby driving the roller 23 to reset, finally releasing the clamping block 26, the third spring 27 returns to its original state, the third spring 27 drives the clamping block 26 to move backward to reset.

[0040] Referring to Figure 1 , the folding plate 28 is further provided. The folding plate 28 is connected between the top of the first sliding frame 3 and the upper side of the first guide rail 2, and is also connected between the bottom of the first sliding frame 3 and the lower side of the first guide rail 2. The folding plate 28 is used to shield the inner side of the first guide rail 2.

[0041] By setting the folding plate 28, when the first sliding frame 3 moves up and down, the folding plate 28 on both sides of up and down can adaptively extend or shorten, so as not to affect the movement of the first sliding frame 3, and the inside of the first guide rail 2 is shielded by the folding plate 28, which can prevent foreign objects from being stuck in the inside of the first guide rail 2 to affect the movement of the first sliding frame 3.

[0042] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A peel test device for testing fiber-metal composite panels, comprising a support base (1), characterized in that, A first guide rail (2) is mounted on the top of the support base (1). A first sliding frame (3) is slidably mounted on the first guide rail (2). A lead screw motor (4) is mounted on the first guide rail (2). The lead screw of the lead screw motor (4) is threadedly connected to the first sliding frame (3). A first clamp (5) for clamping the fiber layer (102) is mounted on the first sliding frame (3). A fixed frame (6) is mounted on the support base (1). A sector rack (7) is rotatably mounted on the fixed frame (6). A rotating mechanism is provided on the fixed frame (6). The rotating mechanism is used to drive the sector rack. The rack (7) rotates, and a second guide rail (9) is installed on the fan-shaped rack (7). A second sliding frame (10) is slidably arranged on the second guide rail (9). A first spring (11) is connected between the second sliding frame (10) and the second guide rail (9). A second clamp (12) for clamping the metal layer (101) is installed on the second sliding frame (10). A connecting rope (13) is connected between the first sliding frame (3) and the second sliding frame (10). A guide mechanism for guiding the connecting rope (13) is installed on the first guide rail (2).

2. The peel test device for testing fiber-metal composite panels as described in claim 1, characterized in that, The rotating mechanism includes a first motor (801) and a gear (802). The first motor (801) is mounted on the fixed frame (6). The gear (802) is connected to the output shaft of the first motor (801). The gear (802) meshes with the sector rack (7).

3. The peel test device for testing fiber-metal composite panels as described in claim 1, characterized in that, The guiding mechanism includes a guide wheel (1401), a connecting frame (1402), and a limiting wheel (1403). The guide wheel (1401) for guiding the connecting rope (13) is rotatably mounted on the second guide rail (9). The connecting frame (1402) is mounted on the first guide rail (2), and the limiting wheel (1403) is rotatably connected to the connecting frame (1402).

4. The peel test device for testing fiber-metal composite panels as described in claim 1, characterized in that, It also includes a detection mechanism, which includes a vision sensor (1501) and a control box (1502). The vision sensor (1501) and the control box (1502) are installed on the second guide rail (9). The vision sensor (1501) is used to detect the posture of the fiber layer (102).

5. The peel test device for testing fiber-metal composite panels as described in claim 1, characterized in that, It also includes a centering mechanism, which includes a centering rod (16), a two-way lead screw (17), a transmission component (18), and a second motor (19). The centering rod (16) is symmetrically slidably arranged on the second sliding frame (10). Two two-way lead screws (17) are rotatably arranged on the second sliding frame (10). The centering rods (16) on both sides are threaded to the two ends of the two-way lead screws (17). A transmission component (18) is arranged between the ends of the two two-way lead screws (17). The transmission component (18) is used to transmit power between the two two-way lead screws (17). The second motor (19) is installed on the side of the second sliding frame (10). The output shaft of the second motor (19) is connected to one of the two-way lead screws (17).

6. The peel test device for testing fiber-metal composite panels as described in claim 5, characterized in that, It also includes a protective sleeve (20), which is installed on the centering rod (16) and is used to protect the sample.

7. The peel test device for testing fiber-metal composite panels as described in claim 1, characterized in that, It also includes a limiting mechanism, which includes a connecting plate (21), a rotating rod (22), a roller (23), a second spring (24), a mounting bracket (25), a locking block (26), and a third spring (27). The connecting plate (21) is mounted on the second guide rail (9), and the rotating rod (22) is rotatably mounted on the connecting plate (21). The roller (23) is rotatably mounted on the rotating rod (22). The roller (23) is used to limit the sample. The second spring (24) is connected between the rotating rod (22) and the second guide rail (9). The mounting bracket (25) is also mounted on the second guide rail (9). The locking block (26) is slidably mounted on the mounting bracket (25). The locking block (26) is used to limit the rotating rod (22). The third spring (27) is connected between the locking block (26) and the mounting bracket (25).

8. The peel test device for testing fiber-metal composite panels as described in claim 1, characterized in that, It also includes a folding plate (28), which is connected between the first sliding frame (3) and the first guide rail (2). The folding plate (28) is used to shield the inside of the first guide rail (2).

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