Fixture for adhesive bonding peel test of composite material

Abstract

The application discloses a kind of composite material bonding peel test clamps, comprising: main frame, angle adjusting structure, fixed roller and movable roller, wherein the main frame includes right-angle frame and arc-shaped frame connected with the right-angle frame, the angle adjusting structure is installed in one side of the main frame, one end is rotationally connected on the right-angle frame by first pivot, the other end can rotate around the arc-shaped frame and can be fixed with it, the first pivot and the center of the arc-shaped frame correspond with the position of coincidence, the fixed roller is fixedly arranged on the other side of the main frame and is coaxially arranged with the first pivot, the movable roller is rotationally arranged on the second pivot fixedly connected with the angle adjusting structure.The composite material bonding peel test clamp, structure is reasonable, it is convenient to adjust, can assist testing machine to simulate the peeling test of bonding component under different angles.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of composite material bonding performance detection and research, and particularly provides a clamp for composite material bonding peel test, which is installed on a testing machine for use. BACKGROUND

[0002] Composite materials have the characteristics of high strength / density, high elastic modulus / density, good damping and shock absorption, good designability, good environmental and climate resistance, good fatigue resistance, high material structure consistency, low thermal expansion coefficient and high damage safety.

[0003] Bonding is one of the main connection methods of composite parts, and two or more composite parts are bonded into an integral part through a film material, and the quality of bonding directly affects the performance of the entire part.

[0004] Peel test is a common detection method for bonding quality, and detection methods such as floating roller peel, drum peel, 180° peel and 90° peel are commonly used to detect bonding performance, however, due to the fact that composite parts bonded together will be subjected to loads in different directions in different working environments, the traditional peel test method cannot reflect the bonding performance of the bonded parts in the actual working environment.

[0005] Therefore, it is an urgent problem to be solved to provide a new clamp for composite material bonding peel test, which can cooperate with the testing machine to simulate bonding peel tests at different angles. SUMMARY

[0006] In view of this, the present application aims to provide a clamp for composite material bonding peel test to solve the problem that the existing clamp for bonding peel test cannot reflect the bonding performance of the bonded parts in the actual working environment, that is, it cannot assist in simulating bonding peel tests at different angles.

[0007] The technical scheme provided by the present application is: the fixture for composite material bonding peel test, comprising: main frame, angle adjusting structure, fixed roller and movable roller, wherein, the main frame comprises a right-angle frame and an arc-shaped frame connected with the right-angle frame, the main frame as a whole is in the shape of a quarter circle, the middle part is a hollow area, the arc-shaped frame is provided with angle scale, the angle adjusting structure is installed on one side of the main frame, one end is rotatably connected to the right-angle frame through a first rotating shaft, the other end can rotate around the arc-shaped frame and can be fixed thereto, the first rotating shaft coincides with the center of the arc-shaped frame, the fixed roller is fixedly arranged on the other side of the main frame and coaxially arranged with the first rotating shaft, the movable roller is rotatably arranged on a second rotating shaft, the second rotating shaft passes through the hollow area of the main frame and is fixedly connected with the angle adjusting structure, and the movable roller and the fixed roller are used to support the test sample to be tested placed thereon.

[0008] Preferably, the angle adjusting structure comprises a strip-shaped plate and a fastening plate, wherein the fastening plate is connected to one end of the strip-shaped plate, the inner side is matched with the outer periphery of the arc-shaped frame, a threaded hole is arranged on the fastening plate, and the angle adjusting structure can be fixed through the bolt matched with the threaded hole.

[0009] Further preferably, a strip-shaped hole is arranged on the strip-shaped plate, the strip-shaped hole is located on a straight line with the first rotating shaft, and the second rotating shaft is locked through the bolt passing through the strip-shaped hole.

[0010] Further preferably, a pointer mark matched with the angle scale on the arc-shaped frame is arranged on the fastening plate.

[0011] Further preferably, the first rotating shaft passes through the right-angle frame, and the free end is provided with internal threads, the fixed roller is matched with the first rotating shaft, and is fastened through the bolt matched with the internal threads of the first rotating shaft.

[0012] Further preferably, the fixture for composite material bonding peel test further comprises a limiting structure for limiting the test sample to be tested, preventing it from moving along the axial direction of the first rotating shaft or the second rotating shaft and falling off during the test.

[0013] Further preferably, the free end of the second rotating shaft is provided with internal threads, the limiting structure comprises a first connecting rod and a second connecting rod connected perpendicularly, the first connecting rod is fastened to the free end of the second rotating shaft through a bolt, and a roller is arranged on the second connecting rod and is pressed against the upper surface of the test sample to be tested.

[0014] Further preferably, a connecting beam is further arranged on the top of the main frame for connecting with the upper chuck of the testing machine.

[0015] Further preferably, the composite material bonding peel test fixture further comprises an upper chuck connectable with a crossbeam of a testing machine and a lower chuck connectable with a base of the testing machine, the upper chuck is detachably connected with the connecting beam through a positioning pin, the lower chuck is arranged at a lower part of the main frame in a spaced manner and coaxially arranged with the upper chuck, and the lower chuck comprises a base and a split chuck block connected with the base through the positioning pin.

[0016] Further preferably, the positioning pin comprises a first square rod and a second square rod and a third square rod hinged at two ends of the first square rod.

[0017] The composite material bonding peel test fixture provided by the present application has a reasonable structure, is convenient to adjust, and can assist the testing machine to simulate the peel test of the bonding component at different angles. BRIEF DESCRIPTION OF DRAWINGS

[0018] The present application will be further explained in detail below in combination with the drawings and embodiments:

[0019] Figure 1 The structure diagram of the composite material bonding peel test fixture provided by the present application is shown in the figure;

[0020] Figure 2 The exploded view of the composite material bonding peel test fixture provided by the present application is shown in the figure;

[0021] Figure 3 The diagram of the 90-degree peel test using the composite material bonding peel test fixture provided by the present application is shown in the figure;

[0022] Figure 4 The diagram of the 90-degree peel test using the composite material bonding peel test fixture provided by the present application is shown in the figure; Figure 3 The diagram of the 90-degree peel test using the composite material bonding peel test fixture provided by the present application is shown in the figure;

[0023] Figure 5 The diagram of the 120-degree peel test using the composite material bonding peel test fixture provided by the present application is shown in the figure;

[0024] Figure 6 The exploded view of the upper chuck is shown in the figure;

[0025] Figure 7 The exploded view of the lower chuck is shown in the figure;

[0026] Figure 8 The structure diagram of the positioning pin is shown in the figure. DETAILED DESCRIPTION

[0027] The present application will be further explained in detail below in combination with the drawings and embodiments:

[0028] As Figures 1 to 5As shown in the present application provides a kind of fixture for composite material bonding peel test, comprising: main frame 1, angle adjusting structure 2, fixed roller 3 and movable roller 4, wherein the main frame 1 includes right angle frame 11 and the circular arc frame 12 connected with the right angle frame 11, the main frame 1 overall is a quarter of circular shape, middle part is hollow area, angle scale is provided on the circular arc frame 12, the angle adjusting structure 2 is installed in one side of the main frame 1, one end is rotatably connected to the right angle frame 11 by first pivot 31, the other end can rotate around the circular arc frame 12 and can be fixed therewith, the first pivot 31 and the circular center position of the circular arc frame 12 coincide, the fixed roller 3 is fixedly arranged on the other side of the main frame 1 and coaxially arranged with the first pivot 31, the movable roller 4 is rotatably arranged on the second pivot 41, the second pivot 41 passes through the hollow area of the main frame 1 and is fixedly connected with the angle adjusting structure 2, and the movable roller 4 and the fixed roller 3 are used to support the sample 10 to be tested placed above them.

[0029] The use method of the fixture for composite material bonding peel test is as follows: when peel test is to be done, first adjust the angle adjusting structure, fix it after reaching the specified angle, then fix the fixture on the upper clamp head of the testing machine, place the sample to be tested above the fixed roller and the movable roller, and clamp the end of the flexible adhesive object in the sample into the lower clamp head of the testing machine, then according to the different load directions of the bonded parts in different working environments, separate the upper and lower clamp heads by the testing machine to simulate the peel test at different angles.

[0030] As an improvement of the technical solution, Figure 2 As shown, the angle adjusting structure 2 includes a strip-shaped plate 21 and a fastening plate 22, wherein the fastening plate 22 is connected to one end of the strip-shaped plate 21, the inner side is matched with the outer periphery of the circular arc frame 12, and a threaded hole is provided thereon, and the angle adjusting structure 2 can be fixed by a bolt matched with the threaded hole.

[0031] As an improvement of the technical solution, Figure 2 As shown, a strip-shaped hole 211 is provided on the strip-shaped plate 21, the strip-shaped hole 211 is located on a straight line with the first pivot 31, and the second pivot 41 is locked by a bolt passing through the strip-shaped hole 211. By adjusting the position of the second pivot in the length direction of the strip-shaped hole, the distance between the fixed roller and the movable roller can be adjusted, thereby preventing the whole sample from bending and deforming during the peel test, and in addition, when the sample length is short, the distance between the fixed roller and the movable roller can be reduced to ensure smooth testing.

[0032] As an improvement of the technical solution, Figures 1 to 3 And Figure 5As shown, the fastening plate 22 is provided with a pointer mark matched with the angular scale on the arc-shaped frame 12, through which the peeling angle can be accurately adjusted, preferably, the arc-shaped frame is provided with an angular scale ranging from 90 degrees to 180 degrees, wherein, as shown in Figure 1 、 Figure 3 when the pointer mark indicates 90 degrees, the sample to be tested arranged above the fixed roller and the movable roller is arranged vertically to the separation direction of the upper and lower clamping heads of the testing machine, further preferably, the line connecting the centers of the first rotating shaft and the second rotating shaft is in a straight line with the pointer mark, and during the test, the sample is always parallel to the straight line.

[0033] As an improvement of the technical scheme, as shown in Figure 2 the first rotating shaft 31 penetrates through the right-angle frame 11, and the free end is provided with an internal thread, the fixed roller 3 is matched with the first rotating shaft 31, and is fastened through the bolt matched with the internal thread of the first rotating shaft 31.

[0034] As an improvement of the technical scheme, as shown in Figures 1 to 5 the composite material bonding peeling test fixture further comprises a limiting structure 5 for limiting the sample to be tested, preventing it from moving along the axial direction of the first rotating shaft 31 or the second rotating shaft 41 and falling off during the test.

[0035] As an improvement of the technical scheme, as shown in Figure 2 the free end of the second rotating shaft 41 is provided with an internal thread, the limiting structure 5 comprises a first connecting rod 51 and a second connecting rod (not shown in the figure) connected vertically, the first connecting rod 51 is fastened to the free end of the second rotating shaft 41 through a bolt, a roller 52 is sleeved on the second connecting rod, and is pressed against the upper surface of the sample to be tested 10, preferably, a gasket 9 is arranged between the first connecting rod and the second rotating shaft 41.

[0036] As an improvement of the technical scheme, as shown in Figure 1 the top of the main frame 1 is further provided with a connecting beam 13 for connecting with the upper clamping head of the testing machine.

[0037] As an improvement of the technical scheme, as shown in Figures 3 to 5 the composite material bonding peeling test fixture further comprises an upper clamping head 6 connectable with the cross beam of the testing machine and a lower clamping head 7 connectable with the base of the testing machine, the upper clamping head 6 is detachably connected with the connecting beam 13 through a positioning pin 8, the lower clamping head 7 is arranged at the lower part of the main frame 1 in a spaced manner and coaxially with the upper clamping head 6, and the lower clamping head 7 comprises a base 71 and a split clamping block 72 connected with the base 71 through a positioning pin 8.

[0038] Specifically, as shown in Figure 6As shown, the upper chuck 6 comprises a top mount 61, a first upper chuck body 62 and a second upper chuck body 63, the lower part of the top mount 61 is fixedly connected with a slot 611, the first upper chuck body 62 and the second upper chuck body 63 are identical in structure, and the upper parts are correspondingly provided with semicircular connecting columns matched with the slot 611, and the lower parts are correspondingly provided with clamping blocks connected with the semicircular connecting columns, the inner sides of the clamping blocks are correspondingly provided with square grooves matched with the connecting beam 13, the upper parts of the first upper chuck body 62 and the second upper chuck body 63 are connected with the top mount 61 through positioning pins 8, and the lower parts are connected with the connecting beam 13 through positioning pins 8. Figure 7 As shown, the base 71 of the lower chuck is provided with a slot, the split clamping blocks are identical in structure, and after clamping the unglued end of the flexible adherend, the split clamping blocks can be inserted into the slot and locked through positioning pins 8, preferably, the positions of the split clamping blocks clamping the unglued end of the flexible adherend are provided with knurls to increase the clamping friction force of the two.

[0039] As an improvement of the technical scheme, as shown in the figure, Figure 8 As shown, the positioning pin 8 comprises a first square rod 81 and a second square rod 82 and a third square rod 83 hinged at both ends of the first square rod 81, when locked through the positioning pin, first, one of the second square rod and the third square rod is in a straight line with the first square rod, and after being inserted into the positioning hole and installed in place, the second square rod and the third square rod are rotated to be perpendicular to the first square rod, so as to prevent the positioning pin from falling off during the test, preferably, the two ends of the positioning pin are round heads, so as to be inserted into the positioning hole.

[0040] The detailed description of the embodiments of the present application is written in a progressive manner, and the differences between the various embodiments are emphasized, and the similar parts can be referred to each other.

[0041] The embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the present application.

Claims

1. A jig for use in a composite adhesive bond peel test, characterised in that, The composite material adhesive stripping test fixture comprises a main frame (1), an angle adjusting structure (2), a fixed roller (3) and a movable roller (4), wherein the main frame (1) comprises a right-angle frame (11) and an arc-shaped frame (12) connected with the right-angle frame (11), the main frame (1) is in the shape of a quarter of a circle as a whole, the middle part is a hollow area, the arc-shaped frame (12) is provided with an angle scale, the angle adjusting structure (2) is installed on one side of the main frame (1), one end is rotatably connected to the right-angle frame (11) through a first rotating shaft (31), the other end is rotatable around the arc-shaped frame (12) and can be fixed thereto, the first rotating shaft (31) coincides with the position of the center of the arc-shaped frame (12), the fixed roller (3) is fixedly arranged on the other side of the main frame (1) and coaxially arranged with the first rotating shaft (31), the movable roller (4) is rotatably arranged on a second rotating shaft (41), the second rotating shaft (41) penetrates through the hollow area of the main frame (1) and is fixedly connected with the angle adjusting structure (2), the movable roller (4) and the fixed roller (3) are used for supporting a test sample (10) to be tested placed thereon, the angle adjusting structure (2) comprises a strip-shaped plate (21) and a fastening plate (22), wherein the fastening plate (22) is connected to one end of the strip-shaped plate (21), the inner side is matched with the outer periphery of the arc-shaped frame (12), a threaded hole is arranged on the fastening plate (22), the angle adjusting structure (2) can be fixed through a bolt matched with the threaded hole, the composite material adhesive stripping test fixture further comprises a limiting structure (5) for limiting the test sample to be tested, preventing the test sample from moving along the axial direction of the first rotating shaft (31) or the second rotating shaft (41) and falling off during the test. A strip-shaped hole (211) is arranged on the strip-shaped plate (21), the strip-shaped hole (211) is located on a straight line with the first rotating shaft (31), and the second rotating shaft (41) is locked through a bolt penetrating through the strip-shaped hole (211).

2. The fixture for adhesive bond peel testing of composite materials according to claim 1, characterized in that: A pointer mark is arranged on the fastening plate (22) and matched with the angle scale on the arc-shaped frame (12).

3. The fixture for adhesive bond peel testing of composite materials according to claim 1, characterized in that: The first rotating shaft (31) penetrates through the right-angle frame (11) and is provided with an internal thread at the free end, the fixed roller (3) is matched and sleeved on the first rotating shaft (31) and is fastened through a bolt matched with the internal thread of the first rotating shaft (31).

4. The fixture for adhesive bond peel testing of composite materials according to claim 1, characterized in that: The free end of the second rotating shaft (41) is provided with an internal thread, the limiting structure (5) comprises a first connecting rod (51) and a second connecting rod connected perpendicularly, the first connecting rod (51) is fastened to the free end of the second rotating shaft (41) through a bolt, and a roller (52) is sleeved on the second connecting rod and pressed against the upper surface of the test sample (10) to be tested.

5. The fixture for adhesive bond peel testing of composite materials according to claim 1, characterized in that: A connecting beam (13) is further arranged on the top of the main frame (1) and used for connecting with an upper chuck of a testing machine.

6. The fixture for adhesive bond peel testing of composite materials according to claim 1, characterized in that: ​ 7. The fixture for adhesive bond peel testing of composite materials according to claim 6, characterized in that: Also included are an upper chuck (6) connectable with a cross beam of the testing machine and a lower chuck (7) connectable with a base of the testing machine, the upper chuck (6) being detachably connected with the connecting beam (13) through a positioning pin (8), the lower chuck (7) being arranged in a spaced manner at a lower portion of the main frame (1) and coaxially arranged with the upper chuck (6), the lower chuck (7) comprising a base (71) and a split chuck block (72) connected with the base (71) through the positioning pin (8).

8. The fixture for adhesive bond peel testing of composite materials according to claim 7, characterized in that: The positioning pin (8) comprises a first square rod (81) and a second square rod (82) and a third square rod (83) hinged at two ends of the first square rod (81).

Images