Tensile testing device

Abstract

The utility model discloses a tensile testing device which comprises a base and a movable plate, side frames are fixedly connected to the two sides of the top end of the base, a top frame is fixedly connected to the top ends of the side frames, a protection structure is fixedly connected to one end of the top frame, and a pressure sensor is installed at the bottom end of the movable plate. When the clamping blocks are used for clamping a product, the buffering strips are used for buffering clamping, due to the fact that the traction base and the adjusting screw rod are of a sliding structure, when the product moves and slips due to stretching, the two sets of clamping blocks move in the product slipping direction along the guide grooves under the action of friction force, the clamping force is further increased, and the clamping effect is further improved. Due to the fact that the high-frame-rate camera dynamically monitors the scales in real time, the marking distance of the product at any moment in the stretching process can be dynamically measured, and the marking distance at the moment of disconnection is included. Therefore, the interference of the tensile fixture on the degree of freedom of the sample in the tensile process can be eliminated, so that the tensile force and the broken marking displacement data can be accurately measured.

Description

TECHNICAL FIELD

[0001] The utility model relates to tensile testing device technical field, especially tensile testing device. BACKGROUND

[0002] Flexible / elastic / plastic material after production, for testing its quality and performance, often need sampling detection, and use corresponding test tool to test each performance, and tensile testing device is for the tensile performance of product detection, through the way of clamping product both ends and limit stretching performance test.

[0003] Therefore, the patent specification with the publication number CN218885617U discloses a kind of tensile testing device, including test table, test table top is equipped with tensile testing structure, tensile testing structure contains: driving piece, threaded rod, moving seat, tension sensor, first clamping seat, second clamping seat, fixed seat, ratchet wheel, two clamping assemblies, winding wheel and fixed assembly, the utility model relates to steel wire production technical field, the beneficial effect of the case is: the technical scheme adopts tensile testing structure, when tensile testing is carried out to steel wire, first, one end of steel wire is fixed by first clamping seat and second clamping seat one end of steel wire, then, the other end of steel wire can be fixed using fixed assembly, and after fixing is finished, winding wheel can be rotated, so that steel wire remains tight, facilitate testing, compared with traditional clamping fixture, with good steel wire both ends fixed effect, so as to have use safety and operating stability and other characteristics.The above-mentioned tensile testing device has good convenience when being used, but still some problems exist:

[0004] The above-mentioned tensile testing device has good convenience when being used, but still some problems exist: Utility model content

[0005] The utility model aims at providing a kind of tensile testing device, to solve the defect that the deviation of existing tensile testing device test is prone to due to clamping reason.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a tensile testing device, including a base and a movable plate. Side frames are fixedly connected to both sides of the top of the base, and a top frame is fixedly connected to the top of the side frames. A clamping mechanism is installed at the middle position of the top of the base. The clamping mechanism includes a support frame, a guide groove, a clamping block, a baffle, a traction seat, an adjusting screw, a buffer strip, a spring, and a high frame rate camera. The support frame is installed at the middle position of the top of the base. A movable plate is provided on the inner side of the top frame. A protective structure is fixedly connected to one end of the top frame, and a pressure sensor is installed at the bottom of the movable plate.

[0007] In use, clamp the product at both ends to the upper and lower clamping mechanisms respectively. Then connect the stretching device to the computer via a dedicated wiring harness so that the test data of the stretching device can be transmitted in real time. Then start the stretching device so that the moving plate drives the upper clamping mechanism to move and stretch the product during the movement. The stretching data is monitored in real time by the pressure sensor.

[0008] Preferably, a guide groove is provided at the bottom inside the support frame, and a clamping block is installed inside the guide groove. Baffles are installed inside both sides of one end of the support frame. A traction seat is installed at the top of the clamping block. An adjusting screw is slidably connected inside the top of the traction seat. A buffer strip is slidably connected inside one side of the clamping block. A spring is fixedly connected to one side of the buffer strip. A high frame rate camera is installed on one side of the bottom of the moving plate. The stretching length is monitored in real time by the high frame rate camera, thereby reducing monitoring errors.

[0009] Preferably, the clamping blocks are symmetrically distributed inside the guide groove, and the adjusting screw is threadedly connected to the inside of the support frame, so that the two ends of the product can be stably clamped.

[0010] Preferably, several buffer strips are provided inside one side of the clamping block, and the several buffer strips are evenly distributed on one side of the clamping block to avoid excessive clamping force that could damage the product.

[0011] Preferably, the protective structure includes a support plate, a sliding groove, a connecting plate, a connecting rod, a limiting frame, a slider, and a fastening screw. The support plate is fixedly connected to one end of the top frame. The sliding groove is provided inside the support plate. A connecting plate is provided at one end of the support plate. A connecting rod is fixedly connected to one end of the connecting plate. A limiting frame is fixedly connected to one end of the connecting rod. A slider is fixedly connected to the other end of the connecting plate. A fastening screw is fixedly connected to one end of the slider. The limiting frame prevents the product from breaking and causing personal injury due to excessive swinging and hitting.

[0012] Preferably, the groove and the slider have a sliding structure, and the limiting frame is located at the vertical center line of the base, so that the product passes through the inside of the limiting frame.

[0013] Preferably, the connecting plate is perpendicular to the connecting rod.

[0014] Compared with existing technologies, the advantages of this utility model are: the buffer strip buffers the clamping force while the high frame rate camera monitors the stretching length in real time, and the limit frame prevents the product from breaking and hitting the staff.

[0015] 1. When the clamping blocks clamp the product, the buffer strip cushions the clamping. Since the traction seat and the adjusting screw have a sliding structure, when the product is displaced and slips due to stretching, the two sets of clamping blocks move along the guide groove in the direction of product slippage under the action of friction, and further increase the clamping force.

[0016] Furthermore, because the high frame rate camera dynamically monitors the scale in real time, it can dynamically measure the distance of the markings at any moment during the stretching process, including the distance of the markings at the instant of breakage. This eliminates the interference of the stretching fixture on the sample's degrees of freedom during the stretching process, thereby accurately measuring the tensile force and the displacement data of the markings after breakage.

[0017] 2. Tighten the limiting frame at the front end of the support plate with the fastening screw and corresponding nut, and make the product pass through the inside of the limiting frame. When the product breaks, the limiting frame will greatly reduce the swinging and whipping amplitude when the product breaks. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0019] Figure 2 This is a three-dimensional structural diagram of the clamping mechanism of this utility model;

[0020] Figure 3 This is a partial cross-sectional view of the clamping mechanism of this utility model.

[0021] Figure 4 This is a three-dimensional partial disassembly diagram of the clamping mechanism of this utility model;

[0022] Figure 5 For the present utility model Figure 1 Enlarged cross-sectional view of a portion of point A in the middle section;

[0023] Figure 6 For the present utility model Figure 1 Enlarged cross-sectional view of section B in the middle section;

[0024] Figure 7 This is a three-dimensional partial structural diagram of the protective structure of this utility model.

[0025] In the diagram: 1. Base; 2. Side frame; 3. Top frame; 4. Moving plate; 5. Clamping mechanism; 501. Support frame; 502. Guide groove; 503. Clamping block; 504. Baffle; 505. Traction seat; 506. Adjusting screw; 507. Buffer strip; 508. Spring; 509. High frame rate camera; 6. Protective structure; 601. Support plate; 602. Slide groove; 603. Connecting plate; 604. Connecting rod; 605. Limiting frame; 606. Slider; 607. Fastening screw; 7. Pressure sensor. Detailed Implementation

[0026] 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.

[0027] Please see Figures 1-7 This utility model provides a tensile testing device, including a base 1 and a movable plate 4. Side frames 2 are fixedly connected to both sides of the top of the base 1, and a top frame 3 is fixedly connected to the top of the side frames 2. A movable plate 4 is arranged inside the top frame 3, and a pressure sensor 7 is installed at the bottom of the movable plate 4. A clamping mechanism 5 is installed at the middle position of the top of the base 1. The clamping mechanism 5 includes a support frame 501, a guide groove 502, a clamping block 503, a baffle 504, a traction seat 505, an adjusting screw 506, a buffer strip 507, a spring 508, and a high frame rate camera 509. The support frame 501 is installed at the middle position of the top of the base 1. A guide groove 502 is opened at the lower part of the inside of the support frame 501, and a pressure sensor 7 is installed inside the guide groove 502. The clamping block 503 and the support frame 501 are equipped with baffles 504 on both sides of one end. The top of the clamping block 503 is equipped with a traction seat 505. The top of the traction seat 505 is slidably connected with an adjusting screw 506. The inside of one side of the clamping block 503 is slidably connected with a buffer strip 507. The side of the buffer strip 507 is fixedly connected with a spring 508. A high frame rate camera 509 is installed on one side of the bottom of the moving plate 4. The clamping blocks 503 are symmetrically distributed inside the guide groove 502. The adjusting screw 506 is threadedly connected to the inside of the support frame 501. Several buffer strips 507 are provided inside one side of the clamping block 503, and the several buffer strips 507 are evenly distributed on one side of the clamping block 503.

[0028] See attached document Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5When using the stretching device, the two ends of the product are clamped at the upper and lower clamping mechanisms 5 respectively. The stretching device is then connected to a computer via a dedicated wiring harness, enabling real-time transmission of test data. The stretching device is then activated, causing the moving plate 4 to move the upper clamping mechanism 5, stretching the product during this movement. The stretching data is monitored in real-time by the pressure sensor 7. To prevent excessive clamping force from damaging the product, or insufficient clamping force from causing product displacement and affecting the test, two sets of clamping blocks 503 are installed inside the guide groove 502. Rotating the adjusting screw 506 causes it to press against the traction seat 505, thus pushing the clamping blocks 503. This allows the two sets of clamping blocks 503 to slide along the inclined surfaces on both sides of the guide groove 502. The product is clamped in a clamping device, and elastically sliding buffer strips 507 are installed on the clamping surfaces of the clamping blocks 503. The buffer strips 507 on the contact surfaces of the two sets of clamping blocks 503 are staggered. When the clamping blocks 503 clamp the product, the buffer strips 507 buffer the clamping force to avoid excessive clamping force. When the clamping force is small, since the traction seat 505 and the adjusting screw 506 have a sliding structure, when the product is displaced and slips due to stretching, the friction force causes the two sets of clamping blocks 503 to move along the guide groove 502 in the direction of product slippage, further increasing the clamping force. If the product breaks due to clamping, the high frame rate camera 509 can dynamically monitor the scale in real time and dynamically measure the distance of the mark at any moment during the stretching process, including the distance of the mark at the moment of breakage. This can eliminate the interference of the stretching fixture on the degree of freedom of the sample during the stretching process, thereby accurately measuring the tensile force and the displacement data of the mark after breakage.

[0029] A protective structure 6 is fixedly connected to one end of the top frame 3. The protective structure 6 includes a support plate 601, a slide groove 602, a connecting plate 603, a connecting rod 604, a limiting frame 605, a slider 606, and a fastening screw 607. The support plate 601 is fixedly connected to one end of the top frame 3. The slide groove 602 is provided inside the support plate 601. A connecting plate 603 is provided at one end of the support plate 601. A connecting rod 604 is fixedly connected to one end of the connecting plate 603. A limiting frame 605 is fixedly connected to one end of the connecting rod 604. A slider 606 is fixedly connected to the other end of the connecting plate 603. A fastening screw 607 is fixedly connected to one end of the slider 606. The slide groove 602 and the slider 606 have a sliding structure. The limiting frame 605 is located at the vertical center line of the base 1. The connecting plate 603 is perpendicular to the connecting rod 604.

[0030] See attached document Figure 1 , Figure 6 and Figure 7When the product is subjected to a tensile test by the tensile device, if the product breaks due to excessive tensile force, the product will quickly and irregularly whip and swing once it breaks due to its good flexibility and elasticity. In order to avoid injury to personnel, a limiting frame 605 is installed at the front end of the support plate 601 by tightening the fastening screw 607 and the corresponding nut, and the product passes through the inside of the limiting frame 605. When the product breaks, the limiting frame 605 limits and blocks the product, which greatly reduces the amplitude of the whipping and swinging when the product breaks.

[0031] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A tensile testing device, comprising a base (1) and a movable plate (4); Its features are: Both sides of the top of the base (1) are fixedly connected to side frames (2), and the top of the side frames (2) is fixedly connected to a top frame (3). A clamping mechanism (5) is installed at the middle position of the top of the base (1). The clamping mechanism (5) includes a support frame (501), a guide groove (502), a clamping block (503), a baffle (504), a traction seat (505), an adjusting screw (506), a buffer bar (507), a spring (508), and a high frame rate camera (509). The support frame (501) is installed at the middle position of the top of the base (1). A movable plate (4) is provided on the inner side of the top frame (3), and a protective structure (6) is fixedly connected to one end of the top frame (3); A pressure sensor (7) is installed at the bottom of the movable plate (4).

2. The tensile testing device according to claim 1, characterized in that: A guide groove (502) is provided at the bottom inside the support frame (501). A clamping block (503) is installed inside the guide groove (502). Baffles (504) are installed inside both sides of one end of the support frame (501). A traction seat (505) is installed at the top of the clamping block (503). An adjusting screw (506) is slidably connected inside the top of the traction seat (505). A buffer strip (507) is slidably connected inside one side of the clamping block (503). A spring (508) is fixedly connected to one side of the buffer strip (507). A high frame rate camera (509) is installed on one side of the bottom of the moving plate (4).

3. The tensile testing device according to claim 1, characterized in that: The clamping blocks (503) are symmetrically distributed inside the guide groove (502), and the adjusting screw (506) is threadedly connected to the inside of the support frame (501).

4. The tensile testing device according to claim 1, characterized in that: The buffer strips (507) are arranged in a plurality of them inside one side of the clamping block (503), and the plurality of buffer strips (507) are distributed at equal intervals on one side of the clamping block (503).

5. A tensile testing device according to claim 1, characterized in that: The protective structure (6) includes a support plate (601), a slide groove (602), a connecting plate (603), a connecting rod (604), a limiting frame (605), a slider (606), and a fastening screw (607). The support plate (601) is fixedly connected to one end of the top frame (3). The support plate (601) has a slide groove (602) inside. One end of the support plate (601) is provided with a connecting plate (603). One end of the connecting plate (603) is fixedly connected with a connecting rod (604). One end of the connecting rod (604) is fixedly connected with a limiting frame (605). The other end of the connecting plate (603) is fixedly connected with a slider (606). One end of the slider (606) is fixedly connected with a fastening screw (607).

6. A tensile testing device according to claim 5, characterized in that: The groove (602) and the slider (606) have a sliding structure, and the limiting frame (605) is located at the vertical center line of the base (1).

7. A tensile testing device according to claim 5, characterized in that: The connecting plate (603) is perpendicular to the connecting rod (604).

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