A tensile testing device for materials science

Abstract

This utility model discloses a tensile testing device for materials science, relating to the field of tensile testing technology. It includes: a testing frame; a counterweight box, vertically slidable on one side of the testing frame for holding counterweights; a connecting strip, one end of which is connected to the counterweight box, and the other end which passes over the top of the testing frame; and a connecting block, connected to the end of the connecting strip away from the counterweight box. In this design, after the experimental material is clamped by a fixing clamp, counterweights of a defined mass are placed sequentially inside the counterweight box. The spring elongation increases slowly, and the position of the counterweight box decreases slowly. When the spring elongation between the connecting block and the mounting block reaches its maximum, the connecting block contacts the inner surface of the connecting rod, restricting the upward movement of the connecting block. The spring elongation reaches its maximum and then stops changing, preventing excessive stretching of the test material or damage to the testing device. This provides a large buffer while protecting the device.

Description

Technical Field

[0001] This utility model relates to the technical field of tensile testing, specifically to a tensile testing device for materials science. Background Technology

[0002] In materials science research, the tensile properties of materials are one of the important indicators for evaluating material quality and characteristics. Tensile testing devices are used to conduct tensile tests on materials to obtain various mechanical property parameters during the tensile process. Existing tensile tests test the tensile limit of the material by making the material into a strip of a specific size and adding a counterweight. However, in use, the addition of a counterweight does not produce a visually obvious change, and the counterweight will fall when the experimental material breaks under heavy load, which can easily damage the device. Moreover, the greater the mass, the greater the damage.

[0003] Therefore, those skilled in the art have provided a tensile testing apparatus for materials science to address the problems raised. Utility Model Content

[0004] To address the aforementioned problems, this invention provides a tensile testing device for materials science.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A tensile testing device for materials science, comprising:

[0007] Test fixture;

[0008] The counterweight box is vertically slidable on one side of the test frame;

[0009] A connecting strip, one end of which is connected to the counterweight box, and the other end which wraps around the top of the test frame;

[0010] A connecting block, which is connected to the end of the connecting strip furthest from the counterweight box;

[0011] There are two connecting rods, symmetrically arranged, both of which are rotatably connected to the connecting block;

[0012] Link 2 is rotatably connected to link 1;

[0013] The mounting block is rotatably connected to the bottom ends of the two connecting rods, and the mounting block and the connecting block are connected by a spring. The bottom of the mounting block and the bottom of the test frame are both provided with fixing clips.

[0014] Two limiting frames are provided, symmetrically fixed on the connecting block, and the two limiting frames are in contact with the side of the test frame for positioning, so that the two fixing clamps are aligned.

[0015] In this process, after the experimental material is clamped by two fixed clamps, counterweights of a certain mass are placed in the counterweight box in sequence. When the spring extension between the connecting block and the mounting block reaches its maximum, the connecting block contacts the inner side of the connecting rod to restrict the upward movement of the connecting block. The counterweight box reaches the lowest point of its stroke, and a gap is left between the counterweight box and the bottom of the test frame.

[0016] Preferably, the two limiting frames are located at the bottom of the connecting block, and when the counterweight box is unloaded, the bottom of the limiting frames and the connecting block is below the rotation point of connecting rod one and connecting rod two.

[0017] Preferably, the connecting block is configured in the shape of an "I", with the top of the connecting block being narrower than the bottom and the bottom being wider than the top. The width of the top of the connecting block is less than the width of the test frame, and the width of the bottom of the connecting block is greater than the width of the test frame.

[0018] Preferably, the limiting frame is configured as an "L" shape, with two limiting frames surrounding and contacting the adjacent and opposite sides of the side where the connecting block is located on the test frame.

[0019] Preferably, the connecting block contacts the side of the test frame, and the portion of the connecting strip located on the side of the test frame is vertically arranged.

[0020] Preferably, the test frame is configured in a "T" shape, and the top of the test frame is provided with a roller with a track groove in the middle, and the connecting strip passes around the track groove of the roller.

[0021] Preferably, the bottom of the test frame is provided with a soft pad, which is located directly below the counterweight box, and the thickness of the soft pad is less than the gap between the counterweight box and the bottom of the test frame at the lowest point of the stroke.

[0022] Preferably, the side of the counterweight box is provided with a scale, and when the experimental material is held by the two clamps, the lower surface of the counterweight box is within the scale.

[0023] In summary, this utility model has the following beneficial technical effects:

[0024] 1. After the test material is clamped in the fixing clamp, counterweights of a certain mass are placed in the counterweight box in sequence. The spring elongation increases slowly, and the position of the counterweight box decreases slowly. When the spring elongation between the connecting block and the mounting block reaches its maximum, the connecting block contacts the inner side of the connecting rod and restricts the upward movement of the connecting block. The spring elongation reaches its maximum and no longer changes, thus avoiding excessive stretching of the test material or damage to the test device. It provides a large buffer while protecting the device.

[0025] 2. During the experiment, the length of the spring can change, and the height of the counterweight box gradually decreases, allowing for a direct observation of the changes in tension. When the load-bearing capacity of the experimental material is low, the spring breaks before its maximum deformation, providing a certain buffer. Furthermore, the larger the counterweight and the lower the height, the less impact the counterweight box and counterweight blocks have on the test frame when the load-bearing capacity of the experimental material is low. When the load-bearing capacity of the experimental material is high, the counterweight box is positioned lower when the spring reaches its maximum extension, resulting in a smaller impact when it falls from a lower position. Both methods effectively protect the test frame during use. Attached Figure Description

[0026] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0027] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0028] Figure 2 This is a side view structural diagram of the present invention;

[0029] Figure 3 This is a schematic diagram of the installation structure of the counterweight box of this utility model.

[0030] Explanation of reference numerals in the attached drawings: 1. Test frame; 2. Counterweight box; 3. Connecting bar; 4. Connecting block; 11. Roller; 12. Scale; 41. Link 1; 42. Link 2; 43. Mounting block; 44. Limiting frame. Detailed Implementation

[0031] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0032] A tensile testing device for materials science, referring to Figure 1-3 ,include:

[0033] Test fixture 1 serves as the supporting structure for the entire test device.

[0034] The counterweight box 2 is vertically slidable on one side of the test frame 1 and is used to hold counterweights. By adding counterweights of different masses into the counterweight box 2, the tensile force applied to the test material can be easily adjusted.

[0035] The connecting strip 3 is connected at one end to the counterweight box 2 and at the other end to the top of the test frame 1. The connecting strip 3 is used to transmit the weight of the counterweight box 2 and convert it into a tensile force on the test material.

[0036] Connecting block 4 is connected to the end of connecting strip 3 away from counterweight box 2.

[0037] There are two connecting rods 41, which are symmetrically arranged and are rotatably connected to the connecting block 4.

[0038] Link 2 42 is rotatably connected to link 1 41, and link 2 42 and link 1 41 are bent toward both sides of test frame 1 to form a "V" shape, which can be rotated and deformed as a whole by link 1 41 and link 2 42 under tension.

[0039] Mounting block 43 is rotatably connected to the bottom ends of the two connecting rods 42, and a spring connects mounting block 43 to connecting block 4. The spring not only buffers the change in tension to a certain extent, but also visually reflects the magnitude of the tension through the spring's elongation. Fixing clips are provided at the bottom of mounting block 43 and the bottom of test frame 1 to hold experimental materials. The experimental materials can be set into a long strip of a specific size for convenient tensile testing.

[0040] Two limiting brackets 44 are provided and symmetrically fixed to the connecting block 4. The two limiting brackets 44 are positioned in contact with the side of the test frame 1, aligning the two fixing clamp openings. The limiting brackets 44 ensure that the two fixing clamps are always in the correct position during the test, avoiding eccentric force on the test material due to positional deviation, thereby improving the accuracy of the test results and facilitating the initial installation of the material.

[0041] After the experimental material is clamped by two fixed clamps, counterweights of a certain mass are placed sequentially inside the counterweight box 2. The spring elongation increases slowly, and the position of the counterweight box 2 decreases slowly. When the spring elongation between the connecting block 4 and the mounting block 43 reaches its maximum, the inner side of the connecting block 4 contacts the connecting rod 41, restricting the upward movement of the connecting block 4. The spring elongation stops changing after reaching its maximum, preventing excessive stretching of the test material or damage to the testing device. This provides a large buffer while protecting the device. At this point, the counterweight box 2 reaches the lowest point of its stroke, and a small gap remains between the counterweight box 2 and the bottom of the test frame 1. When the experimental material breaks, the approximate tensile force range can be determined.

[0042] During the experiment, the length of the spring can change, and the height of the counterweight box 2 also changes, allowing for a direct observation of the changes in tension. When the load-bearing capacity of the experimental material is low, it breaks before the spring reaches its maximum deformation, providing a certain buffer. The larger the counterweight, the lower the height. Since the load-bearing capacity of the experimental material is low, the impact of the counterweight box 2 and the counterweight falling onto the test frame 1 is small. When the load-bearing capacity of the experimental material is high, the counterweight box 2 is positioned lower when the spring reaches its maximum extension, and it falls from a lower position, resulting in a smaller impact. In all cases, the test frame 1 can be protected during use.

[0043] Two limiting brackets 44 are located at the bottom of the connecting block 4. When the counterweight box 2 is unloaded, the limiting brackets 44 and the bottom of the connecting block 4 are below the rotation points of connecting rod 1 41 and connecting rod 2 42. In actual use, the width is greatest at the two rotation points of connecting rod 1 41 and connecting rod 2 42. When moving upwards from the bottom of the connecting block 4, the upward distance is greater, resulting in a larger change in the height of the counterweight box 2, which is more intuitive.

[0044] The connecting block 4 is designed in an "I" shape, narrower at the top and wider at the bottom. The top width of the connecting block 4 is less than the width of the test frame 1, while the bottom width is greater than the width of the test frame 1. This "I"-shaped design ensures structural strength while facilitating cooperation with the test frame 1 and allowing for better connection and coordination with connecting rod 41, connecting rod 42, and the limiting frame 44. This design also minimizes the space occupied by the top of the connecting block 4 and provides space for the installation of the limiting frame 44, resulting in a compact and stable structure.

[0045] The limiting frame 44 is set in an "L" shape. The two limiting frames 44 surround the adjacent sides and opposite sides of the side where the connecting block 4 is located on the test frame 1 and are in contact. They can limit the connecting block 4 from multiple directions to ensure that the connecting block 4 can go straight up and down along the test frame 1.

[0046] The connecting block 4 contacts the side of the test frame 1, and the portion of the connecting strip 3 located on the side of the test frame 1 is vertically positioned. This configuration allows for more direct and stable transmission of tensile force, reducing tensile force loss and directional deviation caused by factors such as the tilt of the connecting strip 3.

[0047] The test frame 1 is designed in a "T" shape, and the top of the test frame 1 is equipped with a roller 11 with a track groove in the middle. The connecting strip 3 passes around the track groove of the roller 11. The "T" shaped test frame 1 has a stable structure. The roller 11 can reduce the friction between the connecting strip 3 and the test frame 1, making the connecting strip 3 smoother in the process of transmitting tensile force, and also reducing the wear of the connecting strip 3.

[0048] A soft pad is installed at the bottom of the test frame 1, located directly below the counterweight box 2. The thickness of the pad is less than the gap between the counterweight box 2 and the bottom of the test frame 1 at the lowest point of its stroke. This pad can buffer the impact of material breakage, protect the bottom of the test frame 1 to some extent, and reduce noise generation.

[0049] The side of the counterweight box 2 is marked with a scale 12. When the experimental material is held by the two clamps, the lower surface of the counterweight box 2 is within the scale 12. The lowering position of the counterweight box 2 can be observed intuitively through the scale 12, so as to roughly judge the magnitude of the tensile force applied to the test material, which is convenient for the experimenter to operate and record data.

[0050] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A tensile testing device for materials science, characterized in that, include: Test fixture (1); The counterweight box (2) is vertically slidably positioned on one side of the test frame (1); The connecting bar (3) has one end connected to the counterweight box (2) and the other end wrapped around the top of the test frame (1); A connecting block (4) is connected to the end of the connecting strip (3) away from the counterweight box (2); There are two connecting rods (41) arranged symmetrically, both of which are rotatably connected to the connecting block (4); Linkage 2 (42) is rotatably connected to link 1 (41); The mounting block (43) is rotatably connected to the bottom ends of the two connecting rods (42), and the mounting block (43) and the connecting block (4) are connected by a spring. The bottom of the mounting block (43) and the bottom of the test frame (1) are both provided with fixing clips. Two limit frames (44) are provided and symmetrically fixed on the connecting block (4). The two limit frames (44) are in contact with the side of the test frame (1) for positioning, so that the two fixed clamping parts are aligned. In this process, after the experimental material is clamped by two fixed clamps, a counterweight of a certain mass is placed in the counterweight box (2) in sequence. When the spring extension between the connecting block (4) and the mounting block (43) reaches its maximum, the connecting block (4) contacts the inner side of the connecting rod (41) to restrict the connecting block (4) from moving upward. The counterweight box (2) reaches the lowest point of its stroke, and a gap is left between the counterweight box (2) and the bottom of the test frame (1).

2. The tensile testing device for materials science according to claim 1, characterized in that: The two limiting frames (44) are located at the bottom of the connecting block (4). When the counterweight box (2) is unloaded, the bottom of the limiting frame (44) and the connecting block (4) are below the rotation point of the connecting rod one (41) and the connecting rod two (42).

3. The tensile testing device for materials science according to claim 2, characterized in that: The connecting block (4) is set in the shape of "I", and the connecting block (4) is narrow at the top and wide at the bottom. The width of the top of the connecting block (4) is less than the width of the test frame (1), and the width of the bottom of the connecting block (4) is greater than the width of the test frame (1).

4. The tensile testing device for materials science according to claim 3, characterized in that: The limiting frame (44) is set in an "L" shape, with two limiting frames (44) surrounding and contacting the adjacent sides and opposite sides of the side where the connecting block (4) is located on the test frame (1).

5. A tensile testing device for materials science according to claim 4, characterized in that: The connecting block (4) contacts the side of the test frame (1), and the part of the connecting strip (3) located on the side of the test frame (1) is vertically set.

6. The tensile testing device for materials science according to claim 1, characterized in that: The test frame (1) is set in a "T" shape, and the top of the test frame (1) is provided with a roller (11) with a track groove in the middle, and the connecting strip (3) passes around the track groove of the roller (11).

7. A tensile testing device for materials science according to claim 1, characterized in that: The test frame (1) is provided with a soft pad at the bottom, which is located directly below the counterweight box (2). The thickness of the soft pad is less than the gap between the counterweight box (2) and the bottom of the test frame (1) at the lowest point of the stroke.

8. A tensile testing device for materials science according to claim 1, characterized in that: The side of the counterweight box (2) is provided with a scale (12). When the experimental material is held by two fixed clamps, the lower surface of the counterweight box (2) is within the scale (12).

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