Thin plate tensile tool

Abstract

The utility model relates to the technical field of test tools, and particularly discloses a thin plate tensile tool which comprises a pull head, a panel, a bottom plate, an interlayer gasket, a thin plate and a pressing block, the pull head and the panel are square, a through hole is formed in the middle of the pull head, a self-plugging rivet can penetrate through the through hole, and the panel, the thin plate and the bottom plate are sequentially stacked and locked through screws. The thin plate is clamped by the face plate and the bottom plate, the bottom plate and the face plate are used for clamping the thin plate, a via hole with the size larger than that of the interlayer gasket is formed in the middle of the face plate, the interlayer gasket is arranged between the pull head and the thin plate, the pull head, the interlayer gasket and the thin plate are riveted and fixed through the self-plugging rivet, and the diagonal line of the pull head and the diagonal line of the face plate form an included angle of 45 degrees. The four corners of the pull head and the four corners of the panel are staggered, pressure can be applied from the positions of the four corners of the pull head and the four corners of the panel by using the pressing block, so that the pulling force borne by the self-plugging rivet and the thin plate is uniform, the tensile property of the rivet on the thin plate can be tested, the structure is compact, the operation is convenient, and the reliability is high.

Description

Technical Field

[0001] This utility model relates to the field of experimental tooling technology, specifically to a tooling for tensile testing of thin plates. Background Technology

[0002] Blind rivets, also known as pop rivets or driven rivets, are a type of rivet used for single-sided riveting, commonly used for riveting between sheet metal parts. They are widely used in the aerospace field. During the production of these rivets, their tensile strength needs to be tested. The test is conducted according to the requirements of the national standard GB / T3098.18-2004 "Mechanical Properties of Fasteners - Test Method for Blind Rivets". A test fixture is used to rivet two test plates or test bushings of the same thickness together to form a rivet specimen. The riveted specimen is then mounted on a testing machine, and a load is continuously applied until the specimen fails. The maximum load value is recorded as the maximum tensile load of the rivet. Existing testing methods... A fixture, such as the one disclosed in patent CN217358983U, is used for fatigue testing of blind rivets. It includes a fatigue testing connection fixture, fatigue testing connecting bolts, fatigue testing threaded sleeves, a blind rivet, and a fatigue washer. Two fatigue testing threaded sleeves are placed opposite each other. The fatigue washer is placed between the two fatigue testing threaded sleeves. The blind rivet passes through the two fatigue testing threaded sleeves and the fatigue washer and is riveted into the two fatigue testing threaded sleeves. Two fatigue testing connecting bolts are connected to the two fatigue testing threaded sleeves respectively. Two fatigue testing connection fixtures are also connected to the two fatigue testing connecting bolts respectively. This testing fixture is used to test the maximum tensile load of the rivet and cannot test the tensile strength of the rivet on thin plates. Utility Model Content

[0003] To address the shortcomings of existing technologies, the technical problem solved by this utility model is to provide a tooling for testing the tensile strength of thin plates, thereby solving the problem that existing rivet testing fixtures cannot test the tensile strength of rivets on thin plates.

[0004] To solve the above problems, the technical solution adopted by this utility model is: a tooling for tensile strength of thin plates, including a pull head, a front panel, a bottom plate, a sandwich gasket, a thin plate, and a pressure block. The pull head and the front panel are square, and the pull head has a through hole in the middle through which a blind rivet can pass. The front panel, the thin plate, and the bottom plate are stacked in sequence and locked with screws so that the thin plate is clamped by the front panel and the bottom plate. The front panel has a through hole in the middle with a size larger than that of the sandwich gasket. The sandwich gasket is placed between the pull head and the thin plate. The blind rivet rivets fix the pull head, the sandwich gasket, and the thin plate together. The diagonal of the pull head and the diagonal of the front panel are set at a 45° angle. The pressure block has four triangular prisms evenly distributed on it, and the space in the middle of the four triangular prisms can accommodate the pull head and the front panel.

[0005] Furthermore, the screw is a countersunk flathead screw.

[0006] Furthermore, countersunk holes are evenly distributed at the four corners of the panel, through holes corresponding to the countersunk holes are provided on the thin plate, and threaded holes corresponding to the countersunk holes are provided on the bottom plate. Screws pass through the panel and the thin plate and engage with the threaded holes on the bottom plate to lock them in place.

[0007] Furthermore, the interlayer gasket is provided with positioning protrusions, and the pull head and panel are provided with positioning grooves that cooperate with the positioning protrusions.

[0008] Furthermore, the positioning protrusions and positioning grooves are evenly distributed.

[0009] The beneficial effects of this solution are as follows: Compared with the prior art, this utility model uses a panel and a base plate to clamp the thin plate and uses screws to lock it, which makes it convenient to replace the thin plate. The pull head is set at a 45° angle with the diagonal of the panel, which makes it convenient to apply tension using the pressure block. It can ensure that the rivet is subjected to uniform force and can test the tensile performance of the rivet on the thin plate. It has a compact structure, is easy to operate, and has high reliability. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0011] Figure 2 This is a schematic diagram showing the positions of the zipper pull and the panel of this utility model;

[0012] Figure 3 This is a schematic diagram of the blind rivet structure of this utility model;

[0013] Figure 4 This is a schematic diagram of the pressing block of this utility model;

[0014] Figure 5 This is a schematic diagram illustrating the use of the pressure block of this utility model;

[0015] In the diagram: 1-zipper pull, 2-panel, 3-base plate, 4-layer gasket, 5-thin plate, 6-pickle rivet, 7-screw, 8-pressure block. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Implementation, for example, attached Figures 1 to 4As shown: A tooling for tensile strength of thin plates includes a pull head 1, a face plate 2, a base plate 3, a sandwich gasket 4, a thin plate 5, and a pressure block 8. The pull head 1 and the face plate 2 are square. The pull head 1 has a through hole in the middle through which a pop rivet 6 can pass. The face plate 2, the thin plate 5, and the base plate 3 are stacked sequentially and locked together with screws 7, so that the thin plate 5 is clamped by the face plate 2 and the base plate 3. The base plate 3 and the face plate 2 clamp the thin plate 5, making it easy to replace the thin plate 5. The face plate 2 has countersunk holes evenly distributed at its four corners. The thin plate 5 has through holes corresponding to the countersunk holes. The base plate 3 has threaded holes corresponding to the countersunk holes. The screws 7 pass through the face plate 2 and the thin plate 5 and engage with the threaded holes on the base plate 3 to lock together, ensuring stable clamping of the thin plate 5. The face plate 2 has a through hole in the middle that is larger than the sandwich gasket 4. The sandwich gasket 4 is placed between the pull head 1 and the thin plate 5. The pop rivet 6 holds the pull head... 1. The interlayer gasket 4 and the thin plate 5 are riveted together. The diagonal of the pull head 1 and the diagonal of the panel 2 are set at a 45° angle, so that the four corners of the pull head 1 and the panel 2 are staggered. The pressure block 8 is evenly distributed with four triangular prisms. The space in the middle of the four triangular prisms can accommodate the pull head 1 and the panel 2 and is used to apply load to the pull head 1 and the panel 2. The interlayer gasket 4 is provided with positioning protrusions. The pull head 1 and the panel 2 are provided with positioning grooves that cooperate with the positioning protrusions. Before riveting, the positioning protrusions are engaged with the positioning grooves. The even distribution of the positioning protrusions and positioning grooves ensures uniform force distribution, thereby ensuring that the staggered angle of the pull head 1 and the panel 2 is accurate. Pulling force can be applied from the four corners of the pull head 1. When pulling force is applied, the rivet is evenly stressed. The screw 7 is a flathead countersunk screw 7, which can be installed and removed with a flathead screwdriver, making disassembly convenient.

[0018] The specific implementation process is as follows:

[0019] During testing, a rivet gun is used to rivet the pop rivets 6. The pop rivets 6 rivet the pull head 1, the interlayer gasket 4, and the thin plate 5 to form a test piece, ensuring that the four corners of the pull head 1 and the panel 2 are staggered. Figure 5 As shown, a pressure block 8 is placed on the worktable of the universal testing machine with the triangular prism facing upwards. The specimen is placed on the triangular prism, with the four corners of the pull head 1 corresponding to the four triangular prisms. The four corners of the panel 2 are located between two adjacent triangular prisms. Another pressure block 8 is placed on top of the specimen, with the four triangular prisms of the pressure block 8 corresponding to the four corners of the panel 2. The testing machine is started to apply pressure to the two pressure blocks 8, which actually applies tension to the pull head 1 and the panel 2, and then applies tension to the mandrel 6 and the thin plate 5 until the specimen is damaged. The tensile force value at the time of damage is recorded, which is the tensile strength of the mandrel 6 on the thin plate. The specimen can be tested upside down. By setting the pressure block 8, the specimen can be positioned, and the load can be applied from the four corners of the pull head 2 and the panel 2 to ensure that the specimen is subjected to uniform force. The pressure is converted into tension, which facilitates the test operation. The fixture has a compact structure, is easy to operate, and has high reliability.

[0020] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A tooling for tensile strength of thin plates, characterized in that: The device includes a slider, a front panel, a base plate, a sandwich gasket, a thin plate, and a pressure block. The slider and front panel are square, with a through hole in the center of the slider for a blind rivet to pass through. The front panel, thin plate, and base plate are stacked sequentially and locked together with screws, clamping the thin plate between the front panel and base plate. The front panel has a through hole in the center, larger than the sandwich gasket. The sandwich gasket is placed between the slider and the thin plate. The blind rivet secures the slider, sandwich gasket, and thin plate together. The diagonal of the slider and the diagonal of the front panel form a 45° angle. The pressure block has four triangular prisms evenly distributed on it, with the space in the center of each prism accommodating the slider and front panel.

2. The tooling for tensile testing of thin plates according to claim 1, characterized in that: The screw is a flathead countersunk screw.

3. The tooling for tensile testing of thin plates according to claim 1, characterized in that: The panel has countersunk holes at its four corners, the thin plate has through holes corresponding to the countersunk holes, and the base plate has threaded holes corresponding to the countersunk holes. Screws pass through the panel and the thin plate and engage with the threaded holes on the base plate to lock them in place.

4. The tooling for tensile testing of thin plates according to claim 1, characterized in that: The interlayer gasket is provided with positioning protrusions, and the pull head and panel are provided with positioning grooves that cooperate with the positioning protrusions.

5. The tooling for tensile testing of thin plates according to claim 4, characterized in that: The positioning protrusions and positioning grooves are evenly distributed.

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