Thin film tensile strength detection fixing clamp

Abstract

The utility model discloses a film tensile strength detection stationary fixture, relates to film stationary fixture technical field, including tensile testing machine, moving plate and clamping subassembly, the clamping subassembly includes crossbeam and two chuck, the opposite side of two chuck is equipped with the groove, the bottom end center of crossbeam is fixedly equipped with the magnet block A, the magnet block A is equipped with the magnet block B, and the magnet block B is equipped with the magnet block B; a magnetic attraction block B is attracted to the bottom end of the magnetic attraction block A through magnetic force, and the bottom end of the magnetic attraction block B is fixedly connected with a fixing frame. The clamping positions of the upper end and the lower end of the thin film are fixed and aligned, the accuracy and repeatability of tensile strength detection are improved, the next thin film is rapidly fixed when multiple groups of thin films are tested, the operation convenience is improved, and the time for replacing thin film samples when the multiple groups of thin films are tested is shortened. The problems that the centering performance is poor when the thin film samples are clamped, and the accuracy and repeatability of sample inspection are poor due to the fact that clamping positions possibly have deviation when multiple thin film samples are detected are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of film fixing fixtures, in particular to a film tensile strength detection fixing fixture. Background Art

[0002] A tensile fixture is a key component for measuring the tensile mechanical properties of materials. During the test, a film sample is secured at each end with a fixed fixture. The fixture is then connected to a tensile testing machine, which stretches the sample through the fixture. The measurement data is collected and controlled by a computer using high-precision, highly sensitive instrumentation. Ultimately, the film sample's tensile strength, elastic modulus, elongation, and other mechanical properties are determined.

[0003] Existing fixed clamps require manual adjustment of the distance before clamping the film sample by aligning both ends of the sample with the clamp. This results in poor centering of the sample during clamping, potentially causing deviation between the upper and lower ends of the sample, affecting subsequent tensile strength testing. Furthermore, when testing multiple film samples, the sample clamping positions may deviate, affecting the accuracy and repeatability of the test. Utility Model Content

[0004] The main purpose of the utility model is to provide a film tensile strength detection fixture, which can effectively solve the technical problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A fixing fixture for testing the tensile strength of a thin film includes a tensile testing machine, a movable plate and a clamping assembly. The clamping assembly includes a crossbeam and two clamps. A groove is provided on opposite sides of the two clamps. A magnetic block A is fixedly installed at the center of the bottom end of the crossbeam. The bottom end of the magnetic block A is adsorbed with a magnetic block B by magnetic force. The bottom end of the magnetic block B is fixedly connected to a fixing frame. A fixed roller is fixedly installed inside the fixing frame. An adsorption assembly is provided between the fixed roller and the fixing frame.

[0007] As a further solution of the present invention, the adsorption assembly includes a plurality of adsorption holes, and the plurality of adsorption holes are opened at the top position of the surface of the fixed roller. A filter is provided at the top of the adsorption hole, and a piston head is slidably installed inside the fixed roller, and one end of the piston head is fixedly connected to a moving rod.

[0008] As a further solution of the present invention, a sliding groove is provided inside the fixing frame, a limit block is slidably installed in the sliding groove, the top of the limit block is fixedly connected to a sliding rod, and a spring is fixedly connected between the top of the limit block and the top of the sliding groove.

[0009] As a further solution of the present invention, a plurality of limiting grooves are provided on the surface of the movable rod, the cross section of the limiting grooves is a right-angled triangle structure, and the limiting grooves are adapted to the limiting blocks.

[0010] As a further solution of the present invention, adsorption holes are opened on both sides of the surface of the fixed roller, and the number of the limiting grooves and adsorption holes is the same and they are distributed in an array with the same spacing between the arrays.

[0011] As a further solution of the present invention, the groove is a semicircular structure, and its diameter is larger than the diameter of the fixed roller.

[0012] As a further solution of the present invention, the clamping assembly includes a cylinder, there are two cylinders, which are fixedly mounted on the movable plate and the tensile testing machine respectively, two connecting rods 1 are rotatably mounted on the cylinder, and connecting rod 2 is rotatably mounted on the two connecting rods 1, a crossbeam is fixedly mounted between the two connecting rods 2, a chuck is fixedly mounted on the bottom end of the connecting rod 2, and one side of the chuck is slidably mounted in the guide groove.

[0013] The beneficial effects of the utility model are as follows:

[0014] By arranging the groove, magnetic block A, magnetic block B, fixing frame, fixing roller and adsorption assembly, the film clamping position is fixed and aligned up and down each time, and the test of multiple film samples is faster and more convenient, which effectively improves the stability of the clamping position and the convenience of replacing multiple film samples;

[0015] By setting up the adsorption component, one side of the film must be aligned with one end of the fixed roller when the film is adsorbed, thereby fixing the position of the film and being able to clamp samples of different sizes, effectively improving the practicality of the clamping component. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a film tensile strength testing fixture of the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of a clamping assembly of a film tensile strength testing fixture of the present invention;

[0018] Figure 3 This is a schematic diagram of the overall structure of an adsorption component of a film tensile strength testing fixture of the present invention;

[0019] Figure 4 This utility model is a film tensile strength test fixture Figure 3 Schematic diagram of the cross-section structure;

[0020] Figure 5This is a schematic diagram of the disassembled structure of the adsorption component of a film tensile strength detection fixing fixture of the present invention.

[0021] In the figure: 1. Tensile testing machine; 2. Moving plate; 3. Clamping assembly; 4. Groove; 5. Magnetic block A; 6. Magnetic block B; 7. Fixed frame; 8. Fixed roller; 9. Adsorption assembly; 10. Adsorption hole; 11. Piston head; 12. Moving rod; 13. Limiting groove; 14. Sliding groove; 15. Limiting block; 16. Sliding rod; 17. Spring; 31. Cylinder; 32. Connecting rod 1; 33. Connecting rod 2; 34. Beam; 35. Chuck; 36. Guide groove. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] See also Figure 1 - Figure 5 A film tensile strength testing fixture includes a tensile testing machine 1, a movable plate 2, and a clamping assembly 3. There are two clamping assemblies 3, one is fixedly mounted on the bottom end of the tensile testing machine 1, and the other is fixedly mounted on the movable plate 2. The movable plate 2 can drive the clamping assembly 3 to move, thereby adjusting the distance between the two clamping assemblies 3, so that the film sample is clamped without applying additional tension in the vertical direction. The clamping assembly 3 includes a crossbeam 34 and two chucks 35, and the chucks 35 play the role of clamping the film. Grooves 4 are provided on opposite sides of the two chucks 35. A magnetic block A5 is fixedly mounted at the center of the bottom end of the crossbeam 34. The bottom end of the magnetic block A5 is magnetically adsorbed with a magnetic block B6. It can be quickly installed and detached by magnetic attraction, and the film is light in weight and will not affect the fixation of the magnetic attraction. The bottom end of the magnetic block B6 is fixedly connected to a fixing frame 7, and a fixed roller 8 is fixedly installed inside the fixing frame 7. An adsorption component 9 is arranged between the fixed roller 8 and the fixing frame 7 for fixing the film. The fixed position is determined and there will be no offset. The convenience and centering of the fixation can effectively make the tensile test results of the film more accurate.

[0024] See also Figure 4 - Figure 5The adsorption component 9 includes a plurality of adsorption holes 10, and the plurality of adsorption holes 10 are opened at the top position of the surface of the fixed roller 8. A filter is provided at the top of the adsorption hole 10, so that when the adsorption hole 10 adsorbs the film, the film will not be displaced to the inside of the adsorption hole 10 due to the existence of negative pressure to form a depression. The film is always in a flat state when it is adsorbed. A piston head 11 is slidably installed inside the fixed roller 8. The piston head 11 is in close contact with the inner surface of the fixed roller 8, so that after the film seals the adsorption hole 10, negative pressure can be formed on the inside of the fixed roller 8, thereby adsorbing the film. One end of the piston head 11 is fixedly connected to a moving rod 12, which passes through one side surface of the fixed frame 7 and is slidably connected to the fixed frame 7 for controlling the position of the piston head 11.

[0025] A sliding groove 14 is provided within the fixed frame 7, within which a limit block 15 is slidably mounted. The bottom end of the sliding groove 14 has an opening, through which a portion of the limit block 15 can pass. The opening acts as a limiter, preventing the limit block 15 from disengaging from the sliding groove 14. A sliding rod 16 is fixedly connected to the top of the limit block 15. The top of the sliding rod 16 extends through the top surface of the fixed frame 7, allowing the position of the limit block 15 to be adjusted by manually moving the sliding rod 16. A spring 17 is fixedly connected between the top of the limit block 15 and the top of the sliding groove 14, securing the limit block 15 in place under the action of the spring 17's elastic force. The spring 17 is sheathed on the surface of the sliding rod 16, enhancing the stability of the spring 17 during operation.

[0026] A plurality of limit grooves 13 are provided on the surface of the movable rod 12. The cross section of the limit groove 13 is a right-angled triangle structure. The limit groove 13 is adapted to the limit block 15. The right-angled triangle structure ensures that the movable rod 12 will not be affected by the limit block 15 when moving outward, and after the movement is completed, the movable rod 12 is limited and will not rebound.

[0027] Adsorption holes 10 are provided on both sides of the surface of the fixed roller 8. When the film is adsorbed and fixed, one side of the film must be aligned with one end of the surface of the fixed roller 8, thus fixing the film in place. The number of limiting grooves 13 and the number of adsorption holes 10 are the same, and they are arranged in an array with uniform spacing. This allows for more precise movement of the piston head 11 during each movement and makes it easier to control the number of adsorption holes 10 that generate negative pressure.

[0028] See also Figure 2 The groove 4 is a semicircular structure with a diameter larger than that of the fixed roller 8. The groove 4 can accommodate the fixed roller 8, so that the bottom end of the chuck 35 can clamp the film, and the fixed roller 8 will not affect the operation of the chuck 35 during clamping.

[0029] The clamping assembly 3 includes a cylinder 31. There are two cylinders 31, which are fixedly mounted on the movable plate 2 and the tensile testing machine 1 respectively. Two connecting rods 32 are rotatably mounted on the cylinder 31, and connecting rods 33 are rotatably mounted on the two connecting rods 32. A crossbeam 34 is fixedly mounted between the two connecting rods 33, and a chuck 35 is fixedly mounted on the bottom end of the connecting rod 33. One side of the chuck 35 is slidably mounted in the guide groove 36. The cylinder 31 can be used to control the approach and distance of the two chucks 35, thereby controlling the clamping and relaxation of the film by the chuck 35. This is a prior art and will not be described in detail.

[0030] The utility model is a film tensile strength detection fixture, and its operating principle is:

[0031] By aligning one side of the film sample with the contact surface of the fixed roller 8 and the fixed frame 7, the film sample is evenly covered on the surface of the fixed roller 8. By pulling the movable rod 12, the movable rod 12 will squeeze the limit block 15 when moving, so that the limit block 15 moves up along the sliding groove 14. The limit block 15 will not prevent the movable rod 12 from moving, thereby driving the piston head 11 to move along the inside of the fixed roller 8. Since the film covers the adsorption hole 10, the adsorption hole 10 is blocked, so that the part covered by the film is in a sealed state, and the piston head 11 moves to put it in a negative pressure state. The fixed roller 8 adsorbs and fixes the film. After adsorbing and fixing the other side of the film, the moving rod 12 is stopped. The limit block 15 moves down under the elastic force of the spring 17 and is clamped in the limit groove 13, which plays a limiting role to prevent the film from detaching from the fixed roller 8 due to the displacement of the piston head 11 caused by the negative pressure.

[0032] Through the magnetic attraction between magnetic blocks A5 and B6, the film-mounted holder 7 is installed between the two clamping assemblies 3. By activating the cylinder 31, the chuck 35 clamps the film, and the film is then subjected to a tensile test. During the experiment, another film can be fixed to the fixed roller 8, making it more convenient to test multiple film samples. After the test, the sliding rod 16 is pulled to disengage the limit block 15 from the guide groove 36, and the movable rod 12 is pushed inward, causing the piston head 11 to move inward, contacting the negative pressure, and the film can be removed.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A film tensile strength testing fixture, comprising a tensile testing machine (1), a movable plate (2) and a clamping assembly (3), characterized in that: The clamping assembly (3) includes a crossbeam (34) and two clamps (35), and grooves (4) are provided on opposite sides of the two clamps (35). A magnetic block A (5) is fixedly installed at the center of the bottom end of the crossbeam (34), and a magnetic block B (6) is adsorbed on the bottom end of the magnetic block A (5) by magnetic force. The bottom end of the magnetic block B (6) is fixedly connected to a fixed frame (7), and a fixed roller (8) is fixedly installed inside the fixed frame (7). An adsorption assembly (9) is provided between the fixed roller (8) and the fixed frame (7).

2. A film tensile strength testing fixture according to claim 1, characterized in that: The adsorption assembly (9) includes a plurality of adsorption holes (10), and the plurality of adsorption holes (10) are opened at the top of the surface of the fixed roller (8). A filter is provided at the top of the adsorption hole (10). A piston head (11) is slidably installed inside the fixed roller (8), and one end of the piston head (11) is fixedly connected to a moving rod (12).

3. A film tensile strength testing fixture according to claim 2, characterized in that: A sliding groove (14) is provided inside the fixing frame (7), a limiting block (15) is slidably installed in the sliding groove (14), a top end of the limiting block (15) is fixedly connected to a sliding rod (16), and a spring (17) is fixedly connected between the top end of the limiting block (15) and the top end of the sliding groove (14).

4. A film tensile strength testing fixture according to claim 3, characterized in that: A plurality of limiting grooves (13) are provided on the surface of the moving rod (12). The cross section of the limiting grooves (13) is a right-angled triangle structure. The limiting grooves (13) are adapted to the limiting blocks (15).

5. A film tensile strength testing fixture according to claim 4, characterized in that: Adsorption holes (10) are provided on both sides of the surface of the fixed roller (8), and the number of the limiting grooves (13) and the adsorption holes (10) is the same and they are all distributed in an array with the same spacing between the arrays.

6. The film tensile strength testing fixture according to claim 1, characterized in that: The groove (4) is a semicircular structure, and its diameter is larger than the diameter of the fixed roller (8).

7. The film tensile strength testing fixture according to claim 1, characterized in that: The clamping assembly (3) includes a cylinder (31), wherein there are two cylinders (31) fixedly mounted on the movable plate (2) and the tensile testing machine (1), respectively; two connecting rods (32) are rotatably mounted on the cylinder (31); connecting rods (33) are rotatably mounted on the two connecting rods (32); a crossbeam (34) is fixedly mounted between the two connecting rods (33); a chuck (35) is fixedly mounted on the bottom end of the connecting rod (33); and one side of the chuck (35) is slidably mounted in a guide groove (36).

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