Tension test device for material detection

Abstract

The invention relates to the technical field of material tension testing, in particular to a tension testing device for material detection, which solves the problems generated when a material is mounted on a clamp of an existing tension testing device and comprises a rack, the clamp is mounted on the rack and used for clamping the material, and a driving device is arranged on the rack and used for driving the material to rotate. The two clamps are used for driving the clamps to move so as to adjust the distance between the two clamps, a force value measurer is mounted on each clamp and measures the tension value of a material, a clamping groove is formed in each clamp, a position-adjustable clamping plate is arranged on one side in each clamping groove, a mounting plate is arranged on the other side in each clamping groove, and the mounting plates are used for mounting the material. The clamping plate is adjusted to be close to the mounting plate, and the clamping plate and the mounting plate are matched for clamping materials. A protruding limiting edge is arranged on the end face of the side, facing the clamping plate, of the mounting plate and used for limiting the mounting position of the end of the material so as to control the length, clamped by the clamping plate and the mounting plate, of the material, and the position of the limiting edge can be adjusted and used for adjusting the length, clamped by the clamping plate and the mounting plate, of the material.

Description

Technical Field

[0001] The present invention relates to the technical field of material tensile testing, and specifically to a tensile testing device for material detection. Background Art

[0002] In the fields of modern industry and scientific research, the accurate detection of material properties is a key link to ensure product quality and promote technological innovation. As an important technical branch spanning multiple disciplines such as mechanical manufacturing, aerospace, construction engineering, and automotive industry, the core goal of the material detection field is to quantitatively analyze the mechanical, physical, and chemical properties of materials through scientific means. Tensile testing, as one of the most basic and widely used means in material detection, aims to accurately obtain key mechanical property indexes such as the tensile strength, yield strength, and elongation rate of materials by simulating the behavior of materials under tensile loads. These data are not only the core basis for material research and development selection, but also important references for product structure design and process optimization.

[0003] The basic principle of existing tensile testing is to install the material to be tested on the clamps on both sides of the tensile testing device, fix and clamp both ends of the material through the clamps, and then apply a linear tensile load through the driving mechanism. During this process, load and displacement data are collected synchronously, and finally the mechanical response of the material is analyzed through data processing. In the actual operation process, to ensure the standardization and repeatability of the test, the staff needs to pre-cut or intercept the material into specimens with specific geometric dimensions in advance, such as common bar-shaped material specimens. Among them, the test length of the specimen is one of the key parameters affecting the test results.

[0004] However, the existing tensile testing devices have certain defects in the actual operation process. Currently, the clamps lack a device for limiting the position of the material, and it is impossible to accurately limit the length of the material installed in the clamps, which results in the uncertainty of the length of the unclamped part of the material between the two clamps during the test. For example, when the material is clamped longer by the two clamps on both sides, the reserved length of the material stretched in the middle will become shorter; conversely, when the clamping on both sides is too short, the reserved length of the material in the middle will become longer. Suppose the clamping length on both sides is 2 cm, and the reserved length in the middle is 10 cm; when the clamping length on both sides becomes 1 cm, the reserved length in the middle becomes 11 cm. This difference in the reserved length will have a serious impact on the tensile value during the tensile test of the material, easily causing a large error in the tensile test results, thereby reducing the accuracy of the tensile test. A large amount of experimental data shows that for every 1 cm increase in the gauge fluctuation range, the error rate of the tensile test results can increase by 5%-8%. Therefore, it is urgent to develop a tensile testing device that can accurately limit the installation position length of the material to improve the accuracy and reliability of the material tensile test. Summary of the Invention

[0005] (1) Technical Problems to be Solved

[0006] In view of the deficiencies of the prior art, the present invention provides a tensile test device for material detection, which solves the problems that occur when the material is installed on the fixture of the existing tensile test device.

[0007] (II) Technical solution

[0008] To achieve the above object, the present invention provides the following technical solution: A tensile test device for material detection, comprising a frame, on which relatively arranged fixtures are installed for clamping the material, a driving device is arranged on the frame for driving the fixture to move to adjust the distance between the two fixtures, a force value measuring device is installed on the fixture, and when the driving device drives the fixture to move, the force value measuring device measures the tensile force value of the material. There is a clamping groove inside the fixture, on one side of the clamping groove, there is a position-adjustable clamping plate, and on the other side, there is a mounting plate for mounting the material. By adjusting the clamping plate to make it approach the mounting plate, the two cooperate to clamp the material; on the end face of the mounting plate facing the clamping plate, there is a protruding limiting edge for defining the mounting position of the end of the material to control the length of the material clamped by the clamping plate and the mounting plate, and the position of the limiting edge is adjustable for adjusting the length of the material clamped by the clamping plate and the mounting plate.

[0009] Further, a threaded rod is installed on the mounting plate, the threaded rod is connected to the limiting edge, and the position of the limiting edge is adjusted by rotating the threaded rod.

[0010] Further, a mounting block is fixedly arranged on the end face of the other side of the mounting plate, the threaded rod is rotatably connected to the mounting block, a connecting block is fixedly arranged on the limiting edge, the connecting block is threadedly connected to the threaded rod, a through groove for the connecting block to pass through is opened on the mounting plate, a screwing block for rotating the threaded rod is arranged on the threaded rod, and a scale for the limiting edge to refer to is marked on the mounting plate.

[0011] Further, a clamping assembly is installed on the limiting edge, and the clamping assembly is used for clamping one end of the material.

[0012] Further, the clamping assembly is hinged to the limiting edge, and the clamping assembly rotates in a fan shape with the hinge position as the axis with the plane where the mounting plate is located as the reference to adjust the clamping position of the clamping assembly.

[0013] Further, the clamping assembly includes a support frame, a support shaft slidably connected to the support frame, and a spring that provides elastic force to the support shaft. An abutting block is provided at the end of the support shaft facing the mounting plate. A spring is provided between the abutting block and the support frame, and the spring is sleeved outside the support shaft. The elastic force of the spring causes the abutting block to abut against the mounting plate for clamping the material. A hand-held block is fixedly provided at the other end of the support shaft. A connecting shaft is mounted on the limiting edge, and the support frame is rotatably connected to the connecting shaft. A positioning cylinder is provided on the limiting edge. The abutting block enters the positioning cylinder for positioning the abutting block. The positioning cylinder is semicircularly arranged.

[0014] Further, the mounting plate is movably mounted in the clamping groove, and the mounting plate can be moved out of the clamping groove by moving the mounting plate.

[0015] Further, the mounting plate and the fixture are connected by a connecting component.

[0016] Further, the connecting component includes a mounting frame fixedly provided on the mounting plate and a connecting piece provided on the mounting frame. An installation groove for the mounting frame to move is provided on the fixture. A sliding groove is provided on the inner wall of the installation groove, and the connecting piece is installed in the sliding groove and can move in the sliding groove.

[0017] Further, a magnet for adsorbing the mounting plate is installed in the clamping groove of the upper fixture. The magnet adsorbs the mounting plate to fix the mounting plate.

[0018] (III) Beneficial effects

[0019] Compared with the prior art, the present invention provides a tensile test device for material detection, which has the following beneficial effects:

[0020] In this tensile test device for material detection, through the setting of the limiting edge on the mounting plate, the end of the material can be accurately abutted against the limiting edge, clearly defining the length of the material clamped by the clamping plate and the mounting plate. It effectively avoids the fluctuation of the clamping length caused by manual installation deviation, ensures that the clamping lengths at both ends of the material are consistent in the same batch or different batches of tests, and eliminates the test errors caused by the gauge difference from the source.

[0021] For example, after the limiting edge accurately controls the installation position of the material end, the clamping lengths of the two side fixtures are strictly standardized, and then the reserved length (i.e., the gauge) in the middle of the material not clamped between the two fixtures remains constant. For example, when the limiting edge is set to a clamping length of 1 cm, the middle gauge of all specimens is 10 cm, and when the limiting edge is set to a clamping length of 0.5 cm, the middle gauge of all specimens is 11 cm. It makes the stress and strain calculations during the tensile test based on a unified standard, greatly reducing the tensile value error caused by inconsistent gauges, and significantly improving the accuracy and reliability of the test results.

[0022] The position can be adjusted by means of a limit, so that the length of the end of the material clamped can be freely set according to the test requirements. Without replacing the fixture or performing complex operations, the switching of different clamping lengths can be quickly achieved, meeting the needs of diverse test scenarios, improving the practicality of the device, simplifying the operation process, and facilitating the tensile test of materials of multiple specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional structure schematic diagram of the present invention;

[0024] Figure 2 It is a three-dimensional structure schematic diagram of the fixture of the present invention, where the fixture is the lower fixture;

[0025] Figure 3 It is a front view structure schematic diagram of the fixture of the present invention, where the fixture is the lower fixture;

[0026] Figure 4 It is a three-dimensional structure schematic diagram of the fixture of the present invention, where the mounting plate moves upward;

[0027] Figure 5 It is a three-dimensional structure schematic diagram of the fixture of the present invention, where the mounting plate is flipped;

[0028] Figure 6 It is a three-dimensional structure schematic diagram of the fixture of the present invention, where the mounting plate is attached to the outer wall of the fixture;

[0029] Figure 7 It is a cross-sectional structure schematic diagram of the fixture of the present invention;

[0030] Figure 8 It is a three-dimensional structure schematic diagram of the fixture of the present invention, where the fixture is the upper fixture;

[0031] Figure 9 It is a three-dimensional structure schematic diagram of the fixture of the present invention, where the fixture is the upper fixture and the mounting plate is in the clamping groove;

[0032] Figure 10 It is a first three-dimensional structure schematic diagram of the mounting plate of the present invention, where the connecting member is a shaft body;

[0033] Figure 11 It is a second three-dimensional structure schematic diagram of the mounting plate of the present invention;

[0034] Figure 12 It is a side view structure schematic diagram of the mounting plate of the present invention;

[0035] Figure 13 It is a three-dimensional structure schematic diagram of the mounting plate of the present invention, where the connecting member is a slider;

[0036] Figure 14 of the present inventionFigure 5 The structural schematic diagram of the partial enlargement at position A shown in

[0037] Figure 15 For the present invention Figure 8 The structural schematic diagram of the partial enlargement at position B shown in

[0038] Figure 16 For the present invention Figure 11 The structural schematic diagram of the partial enlargement at position C shown in

[0039] In the figure: 1. Controller; 2. Base; 3. Frame; 4. Fixture; 5. Force value measurer; 6. Mounting seat; 7. Connecting seat; 8. Sensor; 9. Limit block; 10. Clamping groove; 11. Clamping plate; 12. Mounting plate; 13. Limit edge; 14. Mounting groove; 15. Chute; 16. Mounting frame; 17. Connecting piece; 18. Lead screw; 19. Threaded rod; 20. Connecting block; 21. Through groove; 22. Mounting block; 23. Screwing block; 24. Pushing block; 25. Connecting shaft; 26. Support frame; 27. Support shaft; 28. Block; 29. Spring; 30. Hand-held block; 31. Positioning cylinder; 32. Guide rod; 33. Screwing cap; 34. Groove 1; 35. Magnet; 36. Groove 2; 37. Magnet; 38. Dust cover. Specific embodiments

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0041] The existing tensile test device for material testing includes a controller 1 and a frame 3. Fixtures 4 are oppositely arranged on the frame 3. The fixtures 4 are used to clamp the material to be tested. A driving device is also arranged on the frame 3. The driving device is used to drive the fixtures 4 to move to adjust the distance between the two fixtures 4 (such as a motor and a lead screw cooperating to drive the fixtures 4 to move, or a hydraulic cylinder driving the fixtures 4 to move), and a force value tester is installed on the fixtures 4. When the driving device drives the fixtures 4 to move, the force value measurer 5 can measure the tensile force value of the material.

[0042] In the existing tensile testing device for material detection, a base 2 is provided at the bottom of the frame 3. The base 2 is fixedly connected to one of the clamps 4 through a mounting seat 6, and the other clamp 4 is connected to the driving device through a connecting seat 7. Moreover, a force value measuring device 5 is installed between the connecting seat 7 and this clamp 4. This tensile testing device for material detection can achieve a single-end driving mode where one side clamp 4 is fixed and the other side clamp 4 moves, and it can also support a double-end driving mode where both side clamps 4 are simultaneously driven. When the driving device works, the force value measuring device 5 can measure the tensile force value of the material in real time.

[0043] The controller 1 can precisely control the movement of the driving device and can simultaneously receive the force value data transmitted by the force value measuring device 5. The controller 1 is equipped with a display screen, which can display the force value transmitted by the force value measuring device 5 in real time, record and store it, facilitating the operator to view and analyze the test data at any time.

[0044] The driving device is usually installed inside the frame 3. Usually, a telescopic dust cover 38 is provided outside the frame 3. This dust cover 38 is used to shield the driving device, which can effectively prevent dust, debris, etc. from entering, playing a role in dust prevention and protection, ensuring the normal operation of the driving device, and thus ensuring the measurement accuracy.

[0045] Since the clamp 4 installed on the connecting seat 7 can move, a sensor 8, such as a photoelectric sensor, a travel switch, etc., can be installed on the connecting seat 7, and limit blocks 9 are provided on both sides of the frame 3. When the sensor 8 approaches the limit block 9, it will transmit a signal to the controller 1, and the controller 1 will control the driving device to stop working, thereby limiting the movement range of the movable clamp 4.

[0046] The above content is a structural statement of the existing tensile testing device for material detection, aiming to facilitate technicians to clearly understand the structure of the existing tensile testing device. The above examples do not limit the driving method, setting method, etc. The description of this existing structure does not affect the definition of the protection scope of the innovative content of the present invention in the following text.

[0047] Please refer to Figure 1 As shown, in a tensile testing device for material detection of the present invention, a clamping groove 10 is provided inside the clamp 4. On one side of the clamping groove 10, a position-adjustable clamping plate 11 is provided, and on the other side, a mounting plate 12 is installed. Among them, the mounting plate 12 can be used as a reference carrier for material installation to install the material to be tested; the clamping plate 11 can be driven to move through a manual or automatic adjustment mechanism, and the clamping plate 11 can move closer to or away from the mounting plate 12; when the clamping plate 11 moves closer to the mounting plate 12, the two cooperate with each other to achieve firm clamping of the material by applying an appropriate clamping force.

[0048] As Figures 2 - 9As shown, a convex limiting edge 13 is provided on the end surface of the mounting plate 12 facing the clamping plate 11, and the limiting edge 13 and the clamping plate 11 are designed with a staggered layout. When the clamping plate 11 moves toward the mounting plate 12 and is completely fitted, the limiting edge 13 and the clamping plate 11 do not interfere with each other, which not only ensures the tight clamping effect of the clamping plate 11 and the mounting plate 12 on the material, but also prevents the limiting edge 13 from being clamped between the two and affecting the clamping stability. The limiting edge 13 plays a role in accurately limiting the installation position of the end of the material. When the material is installed on the mounting plate 12, its end abuts against the limiting edge 13, thereby determining the installation position of the material in the clamping groove 10, thereby limiting the length of the material clamped by the clamping plate 11 and the mounting plate 12. Further, the position of the limiting edge 13 can be adjusted by an adjustment component, for example, by using the threaded rod 19 or the slide rail slider described in detail below to achieve the position movement of the limiting edge 13 along the surface of the mounting plate 12. By flexibly adjusting the position of the limit edge 13, the length of the material being clamped can be accurately controlled according to different test requirements, thereby improving the adaptability of the test device to materials of different specifications and different test requirements, and ensuring the accuracy and reliability of the test results.

[0049] The moving drive modes of the clamp 11 are divided into manual and automatic. Automatic adjustment can use power components such as electric telescopic rods and hydraulic cylinders to accurately control the displacement of the clamp 11 through a control system. Manual adjustment can use a lead screw 18 connected to the clamp 4 through a thread. One end of the lead screw 18 is connected to the clamp 11 through a bearing to achieve rotational connection, and the other end extends to the outside of the clamp 4 and is equipped with a screw cap 33. The operator drives the lead screw 18 to rotate axially by rotating the screw cap 33, and uses the principle of threaded transmission to make the clamp 11 move linearly along the direction of the mounting plate 12, so that the clamp 11 is close to the mounting plate 12 or away from the mounting plate 12, thereby achieving fine adjustment of the material clamping force.

[0050] In order to further improve the stability and guiding accuracy of the movement of the clamp 11, a guide rod 32 is fixedly installed on the back of the clamp 11, and the other end of the guide rod 32 passes through the side plate of the clamp 4 and forms a sliding fit with the guide hole on the side plate. The cooperation between the guide rod 32 and the guide hole can effectively suppress the deflection and shaking of the clamp 11 during movement, ensuring that the clamp 11 always moves smoothly along the preset track.

[0051] As shown in Figures 10 and 13, the adjustment of the position of the limit edge 13 is preferably carried out by rotating the threaded rod 19. A rotatable threaded rod 19 is installed on the mounting plate 12. The threaded rod 19 is in threaded driving connection with the limit edge 13. Using the screw drive principle of the threaded rod 19, the limit edge 13 can be linearly displaced along the surface of the mounting plate 12 by rotating the threaded rod 19. This adjustment method has the characteristics of linear and stepless adjustment, that is, the operator can achieve a slight change in the position of the limit edge 13 through a small rotation angle, avoiding the step error of traditional snap-type or gear-type adjustments and significantly improving the adjustment accuracy.

[0052] From the perspective of operation convenience, the adjustment process of rotating the threaded rod 19 can be achieved only by hand-twisting. A screwing block 23 can be fixedly arranged on the threaded rod 19, and the operation can be directly completed by rotating it with the hand. Or the end of the threaded rod 19 can be connected to the rotating end of the motor. The motor can be a servo motor or a stepper motor. The motor is fixedly installed on the mounting plate 12 through a motor base, and the position of the limit edge 13 is adjusted electrically. Whether manual or electric adjustment is adopted, no complex disassembly or assembly steps are required, greatly simplifying the adjustment process. In addition, the self-locking characteristic of the threaded rod 19 can ensure that the limit edge 13 remains stable after being adjusted to the target position, avoiding displacement due to vibration or external force during the test, thus ensuring the consistency of the material clamping length. Adjustment through the threaded rod 19 takes into account adjustment accuracy, operation convenience and structural stability.

[0053] In the specific implementation manner of adjusting through the threaded rod 19, a mounting block 22 is arranged on the other end face of the mounting plate 12 through a fixing structure (such as welding, bolt fastening, etc.). The mounting block 22 provides a rotational support basis for the threaded rod 19, enabling the threaded rod 19 to rotate about its axis. A connecting block 20 is fixedly arranged at the edge position of the limit edge 13 by welding or screw connection. The inner hole of this connecting block 20 is machined with an internal thread matching the external thread of the threaded rod 19, thus forming a threaded transmission pair with the threaded rod 19. A through slot 21 is opened on the mounting plate 12 corresponding to the moving path of the connecting block 20. The width of the through slot 21 is adapted to the size of the connecting block 20, allowing the connecting block 20 to penetrate the mounting plate 12 and move along the slot, and also limiting the sway of the connecting block 20. The screwing block 23 is arranged at one end of the threaded rod 19. The surface of the screwing block 23 can be designed with anti-slip lines or concave-convex structures to facilitate the user to rotate the threaded rod 19 by applying force with the hand. Scale lines and corresponding values are clearly marked on the surface of the mounting plate 12 (such as one side of the through slot 21 or beside the moving track of the limit edge 13). The scale is based on the fixed end of the mounting plate 12 as the reference zero point, used to accurately reflect the moving distance or position of the limit edge 13, providing an intuitive adjustment reference for the user.

[0054] A clamping assembly is installed on the limiting edge 13, which is used to clamp and fix one end of the material, improving the stability of one end of the material after it is installed on the mounting plate 12. Since the clamping assembly is installed on the limiting edge 13, the clamping assembly can move synchronously with the limiting edge 13, ensuring that the clamping assembly can effectively clamp the material when the limiting edge 13 is in different positions.

[0055] The clamping assembly can adopt structures such as clips or elastic metal sheets. The clamping assembly can have its own clamping function. For example, a clip is used to clamp the material; it can also cooperate with the mounting plate 12 to achieve the clamping function. For example, an elastic metal sheet is used to cooperate with the mounting plate 12 for clamping. In the normal state, the end or one side of the metal sheet remains in contact with the surface of the mounting plate 12. When the material is placed between the metal sheet and the mounting plate 12, the metal sheet deforms due to its own elasticity and forms a cooperation with the mounting plate 12 through the elastic force, thereby applying a clamping force to the material and realizing the stable fixation of the material. Utilizing the elastic deformation characteristics, the metal sheet can adapt to materials of different thicknesses and complete the clamping without additional operations, combining convenience and stability.

[0056] The clamping assembly is connected to the limiting edge 13 in a hinged manner. The clamping assembly rotates with the hinge position as the axis based on the plane where the mounting plate 12 is located. Its rotation trajectory forms a fan-shaped area in the plane where the mounting plate 12 is located. According to the material clamping requirements, the clamping assembly can be rotated to any angular position to achieve precise clamping of the material in different orientations (such as horizontal, vertical, or oblique). This fan-shaped rotation design makes the adjustment of the clamping assembly more flexible, adapts to the multi-angle fixation scenarios of materials, and further improves the applicability and operation convenience of the device. It significantly improves the practicality and application range of the device, especially suitable for complex working conditions that require fixing different areas of the material.

[0057] Such as Figure 11 、 12, as shown in FIGS. 14 and 16, the present invention further provides a specific embodiment of a clamping assembly. The clamping assembly includes a support frame 26, a support shaft 27, and a spring 29. The support shaft 27 is slidably connected to the support frame 26 and can move smoothly in a straight line on the support frame 26. A contact block 28 is provided at the end of the support shaft 27 facing the mounting plate 12 to increase the force-bearing area. The spring 29 is sleeved outside the support shaft 27 (the support shaft 27 provides a guiding function for the movement direction of the spring 29) and is located between the contact block 28 and the support frame 26 to provide elastic force for the support shaft 27. Under the action of the elastic force of the spring 29, the contact block 28 always abuts against the mounting plate 12. When clamping a material is required, the material is placed between the contact block 28 and the mounting plate 12, and the elastic force of the spring 29 is used to tightly press the contact block 28 against the material, thereby achieving effective clamping of the material. A hand-held block 30 is fixedly provided at the other end of the support shaft 27, which is convenient for an operator to manually operate the support shaft 27, and the distance between the contact block 28 and the mounting plate 12 is controlled by pulling or pushing the hand-held block 30, thereby realizing the insertion and removal of the material.

[0058] As Figure 11 shown, a connecting shaft 25 is installed on the limiting edge 13, and the support frame 26 is rotatably connected to the connecting shaft 25. This enables the clamping assembly to rotate around the connecting shaft 25 as the axis, thereby adjusting the angle of the clamping assembly to adapt to materials of different shapes and sizes and different clamping requirements. The operator can rotate the clamping assembly to a suitable position according to the actual situation to clamp different parts of the material.

[0059] As Figure 11 shown, a positioning cylinder 31 is provided on the limiting edge 13. When the clamping assembly is not required to be used for clamping, the contact block 28 can be rotated to the position of the positioning cylinder 31 and the contact block 28 can be inserted into the positioning cylinder 31. The positioning cylinder 31 can position the contact block 28 and fix the contact block 28 at a specific position, preventing it from shaking or rotating randomly and ensuring the stability of the clamping assembly. The positioning cylinder 31 is provided in a circular or semi-circular shape. In the present invention, a semi-circular shape is preferably used. This semi-circular positioning cylinder facilitates the entry and exit of the contact block 28 from the opening on one side of the cylinder, making the operation more convenient, fast, and improving the operation efficiency.

[0060] The present invention further improves the installation method of the mounting plate 12. The mounting plate 12 is installed in the clamping groove 10 in a movable manner. Through operations such as translation and rotation, the mounting plate 12 can be moved out of the clamping groove 10. When facing materials such as rubber belts and plastic sheets that are soft and easy to bend or fold, in the traditional installation method, the internal space of the clamping groove 10 is relatively small, so that the operator is limited by the small space of the clamping groove 10 when accurately installing the material on the mounting plate 12. It is difficult to lay or fix such easily deformed materials flatly and accurately on the surface of the mounting plate 12, and it is easy to cause problems such as material wrinkles and position offset, which affects the accuracy of installation and further affects the effect of subsequent precise detection.

[0061] After the mounting plate 12 is moved out of the clamping groove 10, the operating space is not restricted by the clamping groove 10: the operator can more easily lay and align the materials in an open environment, and conveniently install the materials on the mounting plate 12. For example, the stretch of the rubber belt can be adjusted more intuitively to ensure that the edge of the end of the material is completely aligned or abutted against the limit edge 13; for thin materials such as rubber belts and plastic sheets, the inconvenience of installation caused by the obstruction of the inner wall of the clamping groove 10 can also be avoided. It can be directly flatly attached to the mounting plate 12 and preliminarily fixed by structures such as clamping components. After the material is positioned and fixed on the mounting plate 12, the mounting plate 12 is moved back into the clamping groove 10 to achieve a stable fit between the mounting plate 12 and the clamping groove 10. It solves the technical problem of accurately installing easily deformable materials in a small space, significantly improves the convenience of operation and the accuracy of material installation, and is particularly suitable for application scenarios with high requirements for installation flatness and position accuracy.

[0062] Furthermore, Figures 2 - 10 As shown, the mounting plate 12 and the clamp 4 are movably connected via a connecting assembly, which enables the mounting plate 12 to be moved out of the clamping groove 10 by translation or rotation. The main function of the connecting assembly is to ensure that the mounting plate 12 does not separate from the clamp 4 when it is removed through its limiting function, so as to avoid loss or falling. While giving the mounting plate 12 the flexibility of "being able to be removed from the clamping groove 10", the connecting assembly realizes reliable limiting and support of the mounting plate 12 through physical structural constraints, and provides precise guidance for the "removal-installation-movement" operation process, ensuring that the mounting plate 12 can be quickly reset to the preset position in the clamping groove 10 each time it is moved into the clamping groove 10, thereby improving operation efficiency and installation accuracy.

[0063] like Figure 10 and 13As shown in the figure, the specific implementation of the connecting component. The connecting component includes a mounting bracket 16 and a connecting piece 17. Specifically: The mounting bracket 16 is fixed to the back of the mounting plate 12 by welding or bolts. A connecting piece 17 (such as a shaft body, a slider, a roller or a boss) that is connected to the mounting bracket 16 extends outward from the mounting bracket 16. A mounting groove 14 adapted to the mounting bracket 16 is provided at the corresponding position of the fixture 4. Slide grooves 15 are machined on both sides of the inner wall of the mounting groove 14. The connecting piece 17 is embedded in the slide groove 15 to form a sliding pair. When operation is required, the mounting plate 12 drives the mounting bracket 16 to translate or rotate slightly along the slide groove 15, so that the mounting plate 12 gradually moves out of the clamping groove 10. At this time, the connecting piece 17 always moves within the slide groove 15 and is blocked by the limiting structure at the end of the slide groove 15 to prevent the entire mounting bracket 16 from detaching from the fixture 4. This design not only utilizes the guiding function of the slide groove 15 to ensure the stability of the movement trajectory of the mounting plate 12, but also prevents it from falling through mechanical limiting, and at the same time provides an open space for material installation. After the material is fixed, the mounting plate 12 can be accurately reset along the original slide groove 15 trajectory. The precise machining dimensions of the slide groove 15 ensure the positioning accuracy when the mounting plate 12 returns, solving the problem that the traditional fixed structure is difficult to operate in a narrow space, and is especially suitable for the flat installation requirements of easily deformable materials such as rubber bands and plastic sheets.

[0064] It should be noted that the installation position of the threaded rod 19 on the mounting plate 12 is aligned with the mounting groove 14, and the threaded rod 19 can enter the mounting groove 14, so that the end face of the mounting plate 12 is closely attached to the inner wall of the fixture 4, ensuring the stability of the mounting plate 12.

[0065] In the existing tensile test device for material detection, the distribution states of the fixtures 4 are diverse. Commonly seen are vertical distribution up and down, horizontal distribution left and right, etc. For the installation and setting methods of the fixtures 4 at different positions, it is necessary to carry out adaptive design and description of the installation method of the mounting bracket 16 used for the mounting plate 12 to meet the diverse installation requirements.

[0066] When the opposite fixtures 4 are vertically distributed up and down, the connecting piece 17 of the connecting component can adopt a combined structure of a shaft body and a slide groove 15: The shaft body is correspondingly embedded in the slide groove 15. As Figures 4 - 6 shown in the movement direction of the mounting plate 12, after the mounting plate 12 is moved out of the clamping groove 10, the shaft body can rotate in the slide groove 15, driving the mounting plate 12 to flip around the shaft body, so that the mounting plate 12 abuts against the outer wall of the fixture 4 (the top wall, the bottom wall or the side wall). The outer wall of the fixture 4 provides stable support for the mounting plate 12 and provides a reliable operation platform for material installation.

[0067] Translate it to the open space above or beside the fixture 4. At this time, the shaft body still moves along the track of the chute 15 to ensure that the mounting plate 12 does not separate from the fixture 4. After the material is installed, operate the mounting plate 12 in the reverse direction to make its shaft body fall back along the chute 15. The outer wall at the top or side of the fixture 4 contacts the mounting plate 12 to form a stable support structure, providing a reliable operation platform for material installation. This design realizes the flexible flipping and positioning of the mounting plate 12 between the vertically distributed fixtures 4 through the rotational cooperation of the shaft body and the chute 15, and uses the self-structure of the fixture 4 to provide support force, which not only expands the operation space but also ensures the stability during the installation process, especially suitable for the material installation scenario where the fixture 4 operates in the vertical direction.

[0068] When installing the mounting plate 12 through the cooperation of the connecting piece 17 and the chute 15, as Figures 8 - 9 shown, the mounting plate 12 installed on the upper fixture 4 will be affected by gravity, causing the mounting plate 12 to fall downward from the chute 15. Therefore, a magnetic attraction fixing structure can be set in the clamping groove 10 of the upper fixture 4: as Figure 8 and 15 shown, specifically, a groove 34 is opened on the inner wall of the clamping groove 10, and a magnet 35 (such as a permanent magnet) is embedded in the groove 34; the mounting plate 12 is made of steel or iron sheets are fixed at the corresponding positions on the surface. When the mounting plate 12 returns to the preset position in the clamping groove 10, the magnet 35 adsorbs the mounting plate 12 through magnetic force to offset the influence of gravity and achieve gapless fixing. This design utilizes the fast adsorption characteristic of magnetic force, without the need for additional manual locking operations, which can not only ensure that the mounting plate 12 is stable and does not displace during the test process, but also facilitate quick disassembly and assembly, especially suitable for the installation scenario in the vertical direction (such as the vertically distributed fixtures 4), improving the reliability and operation efficiency of the device.

[0069] As Figure 8 shown, when the mounting plate 12 is removed from the clamping groove 10 of the upper fixture 4, in order to ensure that it can still obtain stable support during the operation, a magnetic attraction fixing structure can be added to the outer wall of the fixture 4. Specifically, a groove 36 is opened on the outer wall of the fixture 4, and a magnet 37 is embedded inside the groove 36. The mounting plate 12 can be made of steel or iron sheets are fixed at the corresponding positions on its surface. When the mounting plate 12 is removed from the clamping groove 10, the operator brings it close to the outer wall of the fixture 4, and the magnetic force generated by the magnet 37 quickly adsorbs the mounting plate 12, making it closely fit on the surface of the fixture 4. Through this magnetic attraction connection method, the fixture 4 can provide stable support for the mounting plate 12, avoiding its shaking or displacement during operations such as material installation and adjustment, which may affect the installation accuracy.

[0070] In addition to the above-mentioned magnetic fixing structure to achieve stable installation of the mounting plate 12, other positioning devices can also be used to meet the positioning of the mounting plate 12. For example, the mechanical snap-fit device achieves rapid disassembly and assembly and precise positioning through the engagement of elastic claws and slots; the positioning pin structure uses conical or cylindrical pins to insert into corresponding pin holes to provide reliable circumferential and axial limits; the wedge block positioning system uses the friction and extrusion force generated by the wedging angle to enhance the vibration resistance of the mounting plate 12. These positioning devices can be flexibly configured according to load intensity, operating frequency and environmental conditions to ensure that the fixing effect of the mounting plate 12 is safe and reliable.

[0071] As another implementation method, in order to fix the mounting plate 12 removed from the slide slot 15 of the upper clamp 4, it is not only necessary to rely on the magnetic fixing structure, but also possible to change the matching mode between the connecting component and the slide slot 15 to ensure the stability of the mounting plate 12 after it is removed. Specifically, the connecting member 17 of the shaft body used above is replaced with a slider or boss structure that precisely matches the slide slot 15: the outer dimensions of the slider or boss are closely fitted with the inner wall of the slide slot 15, and a very small sliding gap is reserved between the two to ensure smooth movement of the mounting plate 12 while providing effective limit.

[0072] When the mounting plate 12 slides downward from the clamping groove 10, the slider or boss is constrained by the side wall of the slide groove 15, which limits its rotation or displacement. This mechanical limit method allows the mounting plate 12 to remain in a stable vertical state after being moved out of the clamping groove 10, preventing the mounting plate 12 from rotating, deflecting or shaking after being moved out of the clamping groove 10. The operator can directly install the material on the surface of the mounting plate 12 in the vertical direction. The inner wall of the slide groove 15 and the slider / boss are tightly against each other to provide reliable support for the mounting plate 12, ensuring the position accuracy and stability during the material installation process.

[0073] When the relative clamps 4 are horizontally distributed left and right, when the connection member 17 is a slider or a boss, it can be directly installed with the slide groove 15. During use, the mounting plate 12 can be installed on the mounting plate 12 by simply sliding it out of the clamping groove 10. In addition to the above-mentioned matching mode of the slider boss and the slide groove 15, the mounting plate 12 can also adopt other sliding connection structures to realize the operation of moving the mounting plate 12 out and in from the clamping.

[0074] In order to facilitate the movement of the mounting plate 12 in the clamping groove 10 and to facilitate the quick removal and inward movement of the mounting plate 12, a shifting block 24 is provided on the side wall of the mounting plate 12. The shifting block 24 can be fixed to the mounting plate 12 by means of integral molding, bolts, etc., and the surface is treated with anti-slip grains to effectively increase the friction when the finger contacts the shifting block 24. During operation, the user can apply force to the shifting block 24 through fingers or tools to achieve smooth sliding of the mounting plate 12.

[0075] In summary, for the tensile test device for material detection, before use, determine the clamping length of the material end according to the test requirements. By rotating the threaded rod 19 on the mounting plate 12, adjust the limit edge 13 to the target position.

[0076] Put one end of the material into the clamping groove 10 of the fixture 4, and make the material end closely abut against the limit edge 13 to determine the clamping reference. Or remove the mounting plate 12 from the clamping groove 10, closely abut the material end against the limit edge 13 and install it flat on the mounting plate 12, and then use the clamping assembly to initially clamp one end of the material. Then move the mounting plate 12 to the preset position in the clamping groove 10.

[0077] At this time, move the clamping plate 11 towards the mounting plate 12 until the clamping plate 11 and the mounting plate 12 cooperate to complete the stable clamping of the material. Repeat the above steps to install the other end of the material to another fixture 4 to ensure uniform clamping force at both ends.

[0078] Start the driving device, control the two fixtures 4 to move smoothly away from each other in opposite directions. At this time, the force value measuring device 5 collects the tensile force data of the material in real time and synchronously transmits the measurement result to the controller 1. The staff can monitor the tensile force change curve in real time through the controller 1 interface until the material reaches fracture or the preset tensile force threshold, and the test automatically stops.

[0079] Read and record the final tensile test result on the controller 1. After the test, use the driving device to reset the fixture 4 to the initial position, move the clamping plate 11 away from the mounting plate 12 to take out the material, and clean the clamping groove 10 and the mounting plate 12 to prepare for the next test.

[0080] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tensile testing device for material detection, comprising a frame (3), on which a pair of oppositely arranged clamps (4) are installed for clamping the material, a driving device is arranged on the frame (3) for driving the clamps (4) to move to adjust the distance between the two clamps (4), a force value measurer (5) is installed on the clamp (4), and when the driving device drives the clamp (4) to move, the force value measurer (5) measures the tensile force value of the material, characterized in that: The fixture (4) is internally provided with a clamping groove (10). On one side within the clamping groove (10), there is a clamping plate (11) with adjustable position, and on the other side, there is a mounting plate (12). The mounting plate (12) is used for mounting materials. By adjusting the clamping plate (11) to approach the mounting plate (12), the two cooperate to clamp the materials. On the end face of the mounting plate (12) facing the clamping plate (11), there is a protruding limiting edge (13) for defining the mounting position of the end of the material to control the length of the material clamped by the clamping plate (11) and the mounting plate (12), and the position of the limiting edge (13) is adjustable for adjusting the length of the material clamped by the clamping plate (11) and the mounting plate (12).

2. The tensile test device for material detection according to claim 1, characterized in that: A threaded rod (19) is mounted on the mounting plate (12). The threaded rod (19) is connected to the limiting edge (13), and by rotating the threaded rod (19), the position of the limiting edge (13) is adjusted.

3. The tensile testing device for material detection according to claim 2, wherein: On the end face of the other side of the mounting plate (12), there is a fixedly arranged mounting block (22). The threaded rod (19) is rotatably connected to the mounting block (22). A connecting block (20) is fixedly arranged on the limiting edge (13). The connecting block (20) is threadedly connected to the threaded rod (19). A through groove (21) for the connecting block (20) to penetrate through is formed on the mounting plate (12). A screwing block (23) for rotating the threaded rod (19) is arranged on the threaded rod (19). Scales for the limiting edge (13) to refer to are marked on the mounting plate (12).

4. The tensile test device for material detection according to claim 1 or 2, characterized in that: A clamping assembly is mounted on the limiting edge (13). The clamping assembly is used for clamping one end of the material.

5. The tensile test device for material detection according to claim 4, wherein: The clamping assembly is hinged to the limiting edge (13). Based on the plane where the mounting plate (12) is located, the clamping assembly makes a sector-shaped rotation with the hinge position as the axis to adjust the clamping position of the clamping assembly.

6. The tensile test device for material detection according to claim 5, characterized in that: The clamping assembly includes a support frame (26), a support shaft (27) slidably connected to the support frame (26), and a spring (29) for providing elastic force to the support shaft (27). At the end of the support shaft (27) facing the mounting plate (12), there is an abutting block (28). A spring (29) is arranged between the abutting block (28) and the support frame (26), and the spring (29) is sleeved outside the support shaft (27). The elastic force of the spring (29) makes the abutting block (28) abut against the mounting plate (12) for clamping the material. A hand-held block (30) is fixedly arranged at the other end of the support shaft (27). A connecting shaft (25) is mounted on the limiting edge (13). The support frame (26) is rotatably connected to the connecting shaft (25). A positioning cylinder (31) is arranged on the limiting edge (13). The abutting block (28) enters the positioning cylinder (31) for positioning the abutting block (28), and the positioning cylinder (31) is arranged in a semi-circular shape.

7. The tensile test device for material detection according to claim 1, characterized in that: The mounting plate (12) is movably mounted in the clamping groove (10). By moving the mounting plate (12), the mounting plate (12) can be moved out of the clamping groove (10).

8. The tensile test device for material detection according to claim 7, wherein: The mounting plate (12) and the fixture (4) are connected through a connecting component.

9. The tensile test device for material detection according to claim 8, wherein: The connection component includes a mounting bracket (16) fixedly arranged on the mounting plate (12), and a connecting piece (17) arranged on the mounting bracket (16). An installation groove (14) for the mounting bracket (16) to move is formed in the fixture (4). A sliding groove (15) is formed in the inner wall of the installation groove (14). The connecting piece (17) is installed in the sliding groove (15), and the connecting piece (17) can move in the sliding groove (15).

10. The tensile test device for material detection according to any one of claims 7-9, characterized in that: A magnet (35) for adsorbing the mounting plate (12) is installed in the clamping groove (10) of the upper fixture (4). The magnet (35) adsorbs the mounting plate (12) to fix the mounting plate (12).

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