A quick clamp suitable for use in a closed environment

Abstract

The present invention belongs to the technical field of material performance testing, and discloses a quick clamp suitable for use in a closed environment, including two symmetrically arranged clamp assemblies, each of which includes a mounting platform and a clamping mechanism; the mounting platform includes a platform body, a slide baffle and a limit baffle; the clamping mechanism includes a clamping handle, a limit slider and a sample pressing block. The present invention is easy to operate, and can use a mechanical arm to automatically clamp the sample, avoiding manual operation in extreme environments, reducing contact with harmful substances, and effectively ensuring personal safety; because the sample can be clamped after the test conditions are applied, local stress caused by early fixation of the sample can be avoided, ensuring the accuracy of the test data; at the same time, the centering is good, the test process is safe, and the results are reliable.

Description

Technical Field

[0001] The present invention belongs to the technical field of material performance testing, and in particular, relates to a fixture suitable for use in closed environment testing conditions such as SEM. Background Art

[0002] With the rapid development of modern industries such as aerospace and nuclear power, the number of equipment in service under high-temperature vacuum environments and nuclear irradiation conditions has gradually increased. Due to the particularity of vacuum high-temperature environments and nuclear irradiation conditions, equipment materials are often inevitably damaged to varying degrees. If the equipment materials cannot withstand such harsh working conditions for a long time, it is easy to cause device and equipment failure, and in severe cases, lead to equipment leakage, component failure, nuclear pollution and other malignant accidents. Therefore, the safety performance evaluation and mechanical performance testing of materials in harsh environments are crucial.

[0003] Automated clamping devices are essential for testing material properties in closed extreme environments. Existing clamps usually have a single function and often require manual clamping. Manual clamping is not possible in closed environments such as high temperature and radiation. Some automated clamps also have cumbersome and complex operations, and the centering performance of clamping plate-shaped specimens and workpieces is poor, which often leads to unsatisfactory test results. Summary of the invention

[0004] The present invention aims to solve the technical problem of clamping devices in extreme environments such as high temperature, vacuum, and radiation, and provides a quick clamp suitable for use in a closed environment. The clamp is easy to operate and can be quickly clamped in conjunction with a robotic arm. The clamp can be used in a mechanical testing machine to perform mechanical loading tests on a variety of materials such as metal materials, polymer materials, and biomaterials.

[0005] In order to solve the above technical problems, the present invention is implemented through the following technical solutions:

[0006] A quick clamp suitable for use in a closed environment, comprising two symmetrically arranged clamp assemblies, each of which comprises a mounting platform and a clamping mechanism;

[0007] The mounting platform comprises a platform body, a slide block and a limit block; the platform body is provided with a sample mounting groove and a guide block slide groove; slide block blocks are respectively installed at both ends of the guide block slide groove, and a limit block is installed on the outer side of the guide block slide groove between the two slide block blocks;

[0008] The clamping mechanism comprises a clamping handle, a limit slide block and a sample clamping block; the clamping handle can make the intermediate shaft move linearly close to or away from the sample mounting groove by rotating the handle; the intermediate shaft of the clamping handle passes through the limit slide block and is fixedly connected to the sample clamping block; a connecting through hole is provided between the outer end surface and the inner end surface of the limit slide block, the connecting through hole allows the central shaft to pass through, and the limit slide block does not move with the intermediate shaft; a guide block is provided on the inner end surface of the limit slide block, the guide block is cooperatively connected with the guide block slide groove, so that the limit slide block can slide along the guide block slide groove; a clamping block accommodating groove is provided on the inner end surface of the limit slide block, and the clamping block accommodating groove matches the sample clamping block, so that the sample clamping block can be embedded in the limit slide block when the clamping handle is lifted, and move along the guide block slide groove with the limit slide block;

[0009] When the sample pressing block moves to the limit position of the limit baffle along with the limit slider, the sample pressing block is exactly opposite to the position of the sample installation slot. Thereafter, during the clamping process of the clamping handle, the sample pressing block moves along the middle axis of the clamping handle in a direction close to the sample installation slot. At the same time, the sample pressing block is separated from the pressing block accommodating groove of the limit slider and presses the plate-shaped sample to complete the clamping.

[0010] Furthermore, the platform body includes a testing machine mounting portion and a sample clamping portion which are integrally connected, the testing machine mounting portion is used to be connected to the testing machine, and the sample clamping portion is used to place a plate-shaped sample.

[0011] Furthermore, the sample installation groove matches the clamping portion of the plate-shaped sample and the sample pressing block.

[0012] Furthermore, the slide block and the limit block are both fixed to the platform body by means of hexagon socket flat screws.

[0013] Furthermore, the clamping handle is a cam mechanism, and the cam is rotated by rotating the handle to drive the intermediate shaft to move linearly.

[0014] Furthermore, the guide block is wedge-shaped with an outer width greater than an inner width, and the guide block sliding groove is configured as a wedge-shaped groove matching the guide block.

[0015] Furthermore, the sample pressing block is provided with a connecting threaded hole for threaded connection with the end of the intermediate shaft of the clamping handle.

[0016] The beneficial effects of the present invention are:

[0017] (i) The quick clamp provided by the present invention is suitable for use in a closed environment. It is easy to operate and can use a robotic arm to automatically clamp the sample, avoiding manual operation in extreme environments, reducing contact with harmful substances, and effectively ensuring personal safety;

[0018] (ii) The present invention provides a quick clamp suitable for use in a closed environment, which can compress the sample after the test conditions are applied, thereby avoiding local stress caused by premature fixation of the sample and ensuring the accuracy of the test data.

[0019] (III) The present invention provides a quick clamp suitable for use in a closed environment. The sample mounting groove clamps the plate-shaped sample, and the limit slider cooperates with the limit baffle to ensure good centering of the sample, ensure the safety of the test process, and ensure reliable results. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the three-dimensional structure of the quick clamp provided in the embodiment;

[0021] Figure 2 is a three-dimensional disassembly schematic diagram of the quick clamp provided in the embodiment;

[0022] Figure 3 is a front view of the quick clamp provided in the embodiment;

[0023] Figure 4 is a side view of the quick clamp provided in the embodiment;

[0024] Figure 5 is a schematic structural diagram of an installation platform in a quick clamp provided in an embodiment;

[0025] Figure 6 is a schematic structural diagram of a clamping assembly in a quick clamp provided in an embodiment;

[0026] Figure 7 is a schematic structural diagram of a limit slider in a quick clamp provided in an embodiment;

[0027] Figure 8 is a schematic diagram of the connection between the limit slider and the wedge-shaped platform in the quick clamp provided in the embodiment;

[0028] Fig. 9 It is a schematic diagram of the structure of the sample pressing block in the quick clamp provided in the embodiment.

[0029] In the above figure: 1: clamping handle, 101: intermediate shaft; 2: limiting slider, 201: connecting through hole, 202: guide block, 203: pressure block accommodating groove; 3: specimen pressure block; 301: connecting threaded hole, 202: guide block, 203: pressure block accommodating groove; 4: slideway baffle; 5: limiting baffle; 6: hexagon socket flat screw for fixing; 7: plate-shaped specimen; 8: platform body, 801: testing machine mounting part, 802: specimen clamping part, 803: specimen mounting groove, 804: guide block slide groove. DETAILED DESCRIPTION

[0030] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:

[0031] like Figures 1 to 4 As shown, this embodiment provides a quick clamp suitable for use in a closed environment, including two symmetrically arranged clamp assemblies, each of which includes a mounting platform and a clamping mechanism.

[0032] Combination Figure 5 As shown, the mounting platform includes a platform body 8 , a slide block 4 and a limit block 5 .

[0033] The platform body 8 includes an integrally connected testing machine installation part 801 and a sample clamping part 802. The testing machine installation part 801 is used to connect to the testing machine, and the sample clamping part 802 is used to place the plate-like sample 7, so as to complete the test actions such as tension and compression of the plate-like sample 7. The sample clamping parts 802 of the two fixture assembly platform bodies 8 are respectively provided with sample installation grooves 803 on the same side. The sample installation grooves 803 match the clamping part and the sample pressing block 3 of the plate-like sample 7, so that the clamping part and the sample pressing block 3 of the plate-like sample 7 can be clamped in the sample installation grooves 803. The sample clamping part 802 of the platform body 8 is also provided with a guide block slide groove 804. The guide block slide groove 804 is horizontally arranged and located between the testing machine installation part 801 and the sample installation groove 803 of the platform body 8, and is used to connect with the guide block 204 of the limit slider 2.

[0034] Each platform body 8 is equipped with two slideway baffles 4, which are respectively installed at both ends of the guide block slot 804 to prevent the guide block 204 of the limit slider 2 from slipping out of the guide block slot 804. The slideway baffles 4 can be fixed to the platform body 8 by hexagon socket flat screws 6.

[0035] Each platform body 8 is also equipped with a limit baffle 5, which crosses the guide block slot 804 and is installed on the platform body 8, and is used to limit the limit slider 2, so as to ensure that the sample pressing block 3 moving with the limit slider 2 is accurately positioned at the position facing the sample installation slot 803. The limit baffle 5 can be fixed to the platform body 8 by a hexagon socket flat screw 6.

[0036] like Figure 6 As shown, the pressing assembly includes a pressing handle 1, a limiting slider 2 and a sample pressing block 3.

[0037] The clamping handle 1 is a cam mechanism, and the cam is rotated by turning the handle to drive the intermediate shaft 101 to move linearly. When the handle is loosened, the intermediate shaft moves away from the plate-like sample 7; when the handle is clamped, the intermediate shaft 101 moves toward the plate-like sample 7.

[0038] like Figure 7As shown, a connecting through hole 201 is provided between the outer end surface and the inner end surface of the limit slider 2, and the connecting through hole 201 is used to allow the central axis 101 of the clamping handle 1 to pass through, and the limit slider 2 will not move with the intermediate axis 101 of the clamping handle 1. A guide block 202 is provided on the inner end surface of the limit slider 2, and the guide block 202 cooperates with the guide block slide groove 804 of the platform body 8, so that the limit slider 2 is connected to the platform body 8, and the guide block 202 can move horizontally in the guide block slide groove 804, as shown in FIG. Figure 8 As shown. As a preferred embodiment, the guide block 202 is designed to be a wedge-shaped with an outer width greater than an inner width, and the guide block slot 804 is also set to a matching wedge-shaped slot, which can ensure that the limit slider 2 moves horizontally along the guide block slot 804, and prevent the limit slider 2 from vertically separating from the platform body 8. The inner end surface of the limit slider 2 is provided with a pressure block accommodating groove 203, which matches the sample pressure block 3, so that the sample pressure block 3 can be embedded in the limit slider 2 when the clamping handle 1 is lifted, and move horizontally along the guide block slot 804 with the limit slider 2.

[0039] like Fig. 9 As shown, the sample pressing block 3 is provided with a connecting threaded hole 301, and the connecting threaded hole 301 is used to be threadedly connected with the end of the intermediate shaft 101 of the pressing handle 1, so that the sample pressing block 3 moves linearly with the intermediate shaft 101 of the pressing handle 1. When the pressing handle 1 is in a relaxed state, the sample pressing block 3 is lifted with the handle, and the outer end surface of the sample pressing block 3 contacts the bottom of the pressing block receiving groove 203 of the limiting slider 2, and the pressing handle 1 and the sample pressing block 3 can move horizontally along the guide block slide groove 804 with the limiting slider 2. During the pressing process of the pressing handle 1, the sample pressing block 3 moves with the intermediate shaft 101 of the pressing handle 1 toward the direction close to the plate-like sample 7, and the sample pressing block 3 is separated from the pressing block receiving groove 203 of the limiting slider 2 until the inner end surface of the sample pressing block 3 is pressed against the plate-like sample 7 to reach the working state, completing the clamping of the plate-like sample 7.

[0040] The test operation process of the above-mentioned quick clamp is as follows:

[0041] 1) Debug the fatigue testing machine, adjust the installation platform spacing of the two fixture components, and open the test software;

[0042] 2) Loosen the handle of the clamping handle 1, and push the limit slider 2 and the sample pressing block 3 to one side of the guide block slot 804 of the platform body 8 through the clamping handle 1;

[0043] 3) Manually place the plate-shaped sample 7 into the sample installation slot 803 of the platform body 8, align the corners of the plate-shaped sample 7 with the contour of the sample installation slot 803, and clamp it downward to ensure accurate centering.

[0044] 4) Push the limit slider 2 and the sample pressing block 3 again by pressing the handle 1 until the limit slider 2 contacts the limit stopper 5, that is, the limit slider 2 returns to its original position, and the sample pressing block 3 is now aligned with the position of the sample installation slot 803;

[0045] 5) Apply test conditions, such as vacuuming, heating, irradiation, etc., and wait for the test conditions to be met.

[0046] 6) After reaching the test conditions, the robot arm is controlled to squeeze the handle of the clamping handle 1, and the central axis 101 of the clamping handle 1 moves toward the direction close to the plate-like sample 7, driving the sample pressing block 3 to apply force evenly and clamp the plate-like sample 7.

[0047] 5) Set up the test plan and start the test.

[0048] Although the preferred embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific embodiments, which are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms of specific changes without departing from the scope of protection of the invention and the claims, all of which fall within the scope of protection of the present invention.

Claims

1. A quick clamp suitable for use in a closed environment, comprising two symmetrically arranged clamp assemblies, characterized in that: Each of the clamp assemblies comprises a mounting platform and a clamping mechanism; The mounting platform comprises a platform body, a slide block and a limit block; the platform body comprises an integrally connected test machine mounting portion and a sample clamping portion, the test machine mounting portion is used to be connected to the test machine, and the sample clamping portion is used to place a plate-shaped sample; the platform body is provided with a sample mounting groove and a guide block slide groove; slide block plates are respectively installed at both ends of the guide block slide groove, and a limit block plate is installed on the outer side of the guide block slide groove between the two slide block plates; The clamping mechanism comprises a clamping handle, a limiting slider and a sample pressing block; the sample installation groove matches the clamping portion of the plate-shaped sample and the sample pressing block; the clamping handle can make the intermediate shaft move linearly close to or away from the sample installation groove by rotating the handle; the intermediate shaft of the clamping handle passes through the limiting slider and is fixedly connected to the sample pressing block; a connecting through hole is arranged between the outer end face and the inner end face of the limiting slider, the connecting through hole allows the intermediate shaft to pass through, and the limiting slider does not move with the intermediate shaft; a guide block is arranged on the inner end face of the limiting slider, and the guide block is a wedge-shaped guide block with an outer width greater than an inner width; the guide block is connected with the guide block slide groove, and the guide block slide groove is arranged as a wedge-shaped guide groove matching the guide block, so that the limiting slider can slide along the guide block slide groove; a pressing block accommodating groove is arranged on the inner end face of the limiting slider, and the pressing block accommodating groove matches the sample pressing block, so that the sample pressing block can be embedded in the limiting slider when the clamping handle is lifted, and move along the guide block slide groove with the limiting slider; When the sample pressing block moves to the limit position of the limit baffle along with the limit slider, the sample pressing block is exactly opposite to the position of the sample installation slot. Thereafter, during the clamping process of the clamping handle, the sample pressing block moves along the middle axis of the clamping handle in a direction close to the sample installation slot. At the same time, the sample pressing block is separated from the pressing block accommodating groove of the limit slider and presses the plate-shaped sample to complete the clamping.

2. A quick clamp suitable for use in a closed environment according to claim 1, characterized in that: The slideway baffle and the limit baffle are both fixed to the platform body by means of hexagon socket flat screws.

3. The quick clamp suitable for use in a closed environment according to claim 1, characterized in that: The clamping handle is a cam mechanism, and the cam is rotated by rotating the handle to drive the intermediate shaft to move linearly.

4. The quick clamp suitable for use in a closed environment according to claim 1, characterized in that: The sample pressing block is provided with a connecting threaded hole for threaded connection with the end of the intermediate shaft of the pressing handle.

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