Method and device for testing three-point bending performance of composite material

Abstract

The invention relates to the technical field of composite material testing, in particular to a three-point bending performance testing method of a composite material, which is applied to a three-point bending performance testing device of the composite material, and the device comprises two supporting point carriers, a mechanical arm, a sliding assembly and a loading head, the two supporting point carriers are used for placing a composite material to be tested in a three-point bending performance test, the sliding assembly is located on the periphery of the composite material on the supporting point carriers, the loading head is arranged above the two supporting point carriers, and the method comprises the steps that the composite material is moved to the two supporting point carriers through the mechanical arm; the composite material is driven to slide to a preset position on the supporting point carrier by moving the sliding assembly; and a bending load is applied to the loading point of the composite material through the loading head, so that the three-point bending performance test of the composite material is carried out. According to the technical scheme, the sample loading efficiency can be improved, and the accuracy of a test result is ensured.

Description

Technical Field

[0001] This invention relates to the field of composite material testing technology, and in particular to a method and apparatus for testing the three-point bending performance of composite materials. Background Technology

[0002] In tests that apply bending loads to composite materials for performance evaluation, the composite material needs to be placed at a predetermined position on a support carrier to ensure that the bending load is applied to the test area of ​​the composite material. In related technologies, the composite material is typically placed manually at the predetermined position on the support carrier. This results in low sample loading efficiency, and testers often rely on visual judgment to determine if the composite material is accurately placed. This can lead to a deviation between the actual position of the composite material and the predetermined position, causing the loading head to fail to align with the loading point of the composite material during subsequent testing, thus affecting the accuracy of the test results.

[0003] Therefore, there is an urgent need to provide a method and apparatus for testing the three-point bending properties of composite materials to solve the above-mentioned technical problems. Summary of the Invention

[0004] This invention provides a method and apparatus for testing the three-point bending properties of composite materials, which can improve the efficiency of sample loading and ensure the accuracy of test results.

[0005] In a first aspect, the present invention provides a method for testing the three-point bending performance of composite materials, applicable to a three-point bending performance testing device for composite materials. The device includes: two support point carriers, a robotic arm, a sliding component, and a loading head. The two support point carriers are used to hold the composite material to be tested in the three-point bending performance test. The sliding component is located around the composite material on the support point carriers. The loading head is positioned above the two support point carriers. The method includes: The robotic arm moves the composite material onto the two support point carriers. By moving the sliding component, the composite material is slid on the support point carrier to a preset position; A bending load is applied to the loading point of the composite material through the loading head to perform a three-point bending performance test on the composite material.

[0006] Secondly, the present invention provides a three-point bending performance testing device for composite materials, used to implement the above-mentioned three-point bending performance testing method for composite materials, the device comprising: Two support points are used to support the composite material to be tested in the three-point bending performance test; A robotic arm is used to move the composite material onto the two support point carriers; A sliding component is located around the composite material on the support point carrier, and is used to drive the composite material to slide on the support point carrier to a preset position; A loading head, positioned above the two support point carriers, is used to apply bending loads to the loading points of the composite material.

[0007] The present invention provides a method and apparatus for testing the three-point bending performance of composite materials, which can automatically grasp the composite material by a robotic arm and move it to the support carrier, and drive the composite material to move precisely to the preset position by a sliding component, thereby improving the efficiency of sample loading and ensuring the accuracy of subsequent test results. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 A flowchart of a three-point bending performance testing method for composite materials provided in an embodiment of the present invention; Figure 2 A schematic diagram of the structure of a three-point bending performance testing device for composite materials provided in an embodiment of the present invention; Figure 3 Another three-point bending performance testing device for composite materials is provided in this embodiment of the invention.

[0010] Figure label: 1-Supporting point carrier 1; 2-Load header; 3-Robotic arm; 4-First slider; 5 - Second slider; 6- Height adjustment component. Detailed Implementation

[0011] The solution provided by the present invention will now be described with reference to the accompanying drawings.

[0012] Figure 1 A flowchart of a three-point bending performance testing method for composite materials provided in an embodiment of the present invention is shown below. Figure 1As shown, a three-point bending performance testing device for composite materials includes: two support point carriers, a robotic arm, a sliding component, and a loading head. The two support point carriers are used to hold the composite material to be tested in the three-point bending performance test. The sliding component is located around the composite material on the support point carriers, and the loading head is positioned above the two support point carriers. The method includes: S1. The composite material is moved to the two support point carriers by a robotic arm; S2. The composite material is moved to a preset position on the support carrier by moving the sliding component; S3. Apply bending load to the loading point of the composite material through the loading head to perform a three-point bending performance test on the composite material.

[0013] In this embodiment, the three-point bending performance test of the composite material is completed by automatically loading the sample and automatically adjusting the position of the composite material on the test bench (two support point carriers). A robotic arm picks up the composite material to be tested from the area where the composite material is placed and moves it to the two support point carriers, allowing the composite material to rest on them. The support point carriers are equipped with sliding components. After the composite material is placed on the support point carriers, the sliding components push the composite material to move it to a preset position on its left and right sides and / or front and back sides. It is understood that at this preset position, the two preset support points on the composite material are in contact with the two support point carriers, and the preset loading point of the composite material is located directly below (aligned with) the loading head. A bending load is applied to the composite material by the loading head positioned above the support point carriers to perform the three-point bending performance test.

[0014] In one embodiment of the present invention, the device further includes: a driving mechanism disposed on the sliding component, the method comprising: The sliding component is driven to slide by a drive mechanism.

[0015] In this embodiment, the driving mechanism can be a motor-screw system, a cylinder, a linear motor, etc., which can drive the sliding component to slide.

[0016] In one embodiment of the present invention, the sliding component includes: a first slider and a second slider; a first track is disposed on two support point carriers; a second track is disposed below the two support point carriers; the number of first sliders is four, with two first sliders disposed on the first track of one support point carrier and located on both sides of the composite material; the number of second sliders is two, disposed on the second track and located on both sides of the composite material; the method includes: The composite material is pushed to slide on the first track by the first slider until the two preset support points of the composite material contact the two support carriers respectively, and then the sliding stops. The composite material is pushed along the second track by the second slider until the loading point is aligned with the loading head, at which point the sliding stops.

[0017] In this embodiment, the first and second tracks are perpendicular to each other. A first slider slides along the first track to move the composite material along the direction of the first track, and a second slider slides along the second track to move the composite material along the direction of the second track. On each track, a slider is provided on each side of the composite material to simultaneously move the composite material along that track. There are two first tracks, each set on a support point carrier, and each first track has two first sliders. There is one second track, located below the support point carrier, and the second track has two second sliders. The first sliders slide on the two first tracks, adjusting the position of the composite material along the direction of the first track, and the second sliders move on the second track, adjusting the position of the composite material along the direction of the second track.

[0018] In one embodiment of the present invention, applying a bending load to the loading point of the composite material via a loading head includes: The loading head moves toward the composite material at a preset rate to apply load forces to the loading point of the composite material.

[0019] In this embodiment, after the composite material moves to the preset position of the support point carrier, the loading head is located directly above the loading point and moves downward at a constant rate to apply bending load (force and bending moment) to the composite material, causing the composite material to bend and deform.

[0020] In one embodiment of the present invention, the end of the robotic arm is provided with a gripper, and the robotic arm moves the composite material onto two support point carriers, including: The composite material to be tested is grasped by a gripper; The composite material is moved to a carrier with two support points using a robotic arm; The composite material is released by the gripper, leaving it on the carrier at two support points.

[0021] In this embodiment, the end effector of the robotic arm is equipped with a gripper. The gripper grasps the composite material, and the robotic arm performs a transfer action to transport the composite material to a preset position on the support carrier. After reaching the preset position, the gripper releases the composite material, leaving it in the preset position for subsequent bending performance testing.

[0022] In one embodiment of the present invention, after the composite material slides to a preset position, the sliding component returns to the initial position of the sliding component.

[0023] In this embodiment, after the composite material reaches the preset position, the sliding component returns to its initial position, which facilitates the subsequent application of bending load to the composite material through the loading head.

[0024] In one embodiment of the present invention, the device further includes a clamping component disposed in the test area, and the method further includes clamping the composite material by the clamping component after the composite material reaches a preset position.

[0025] Furthermore, the present invention also provides a three-point bending performance testing device for composite materials, applied to the aforementioned three-point bending performance testing method for composite materials, comprising: Two support points are used to support the composite material to be tested in the three-point bending performance test; Robotic arm 3 is used to move the composite material onto a carrier with two support points; The sliding component is located around the composite material on the support point carrier and is used to drive the composite material to slide on the support point carrier to a preset position. Loading head 2, positioned above the two support point carriers, is used to apply bending loads to the loading points of the composite material.

[0026] In one embodiment of the present invention, a driving mechanism (not shown in the figure) is further included, which is disposed on the sliding component and is used to drive the sliding component to slide.

[0027] In one embodiment of the present invention, the sliding component includes: a first slider 4 and a second slider 5, a first track is provided on the two support point carriers 1, and a second track is provided below the two support point carriers 1; There are four first sliders 4. Every two first sliders 4 are set on the first track of a support point carrier 1 and are located on both sides of the composite material. They are used to push the composite material to slide on the first track until the two preset support points of the composite material contact the two support point carriers respectively. There are two second sliders 5, which are set on the second track and located on both sides of the composite material. They are used to push the composite material to slide on the second track until the loading point is aligned with the loading head 2.

[0028] In one embodiment of the present invention, the end of the robotic arm 3 is provided with a gripper for grasping composite materials.

[0029] In one embodiment of the present invention, a height adjustment component 6 is further included, disposed below the two support point carriers, for adjusting the height of the two support point carriers.

[0030] In this embodiment, the height adjustment component 6 is located below the support point carrier and can be fixedly connected to the second track. Through its own extension or transmission adjustment, the height of the two support point carriers can be adjusted.

[0031] In one embodiment of the present invention, the first slider 4 is a bolt, which is used to cause the composite material to be displaced along the first track direction by rotating the bolt.

[0032] In this embodiment, the first slider 4 is a bolt. By rotating the bolt clockwise or counterclockwise, the bolt is displaced along the first track direction using the principle of screw transmission, thereby pushing the composite material to move along the first track.

[0033] In one embodiment of the present invention, the two support point carriers are movable structures, used to adjust the distance between the support point carriers by sliding along the second track.

[0034] In this embodiment, the two support point carriers can slide along the second track to adjust the spacing between the two support point carriers to match the two preset support points on the composite material.

[0035] In one embodiment of the present invention, two support point carriers are fixed on a second track.

[0036] In this embodiment, when it is not necessary to adjust the distance between the two support point carriers, the support point carriers can be fixed on the second track by bolts to prevent the two support point carriers from moving.

[0037] It is understood that the above-described device embodiments and the method embodiments provided by the present invention are based on the same inventive concept and have the same beneficial effects. The beneficial effects of the same parts of the device embodiments will not be described in detail here.

[0038] In summary, the method and apparatus for testing the three-point bending properties of composite materials provided in this invention have the following technical advantages: The robotic arm can automatically grab composite materials and move them to the support carrier. The sliding component can then move the composite materials precisely to the preset position, improving the efficiency of sample loading and ensuring the accuracy of subsequent test results.

[0039] It should be noted that, in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0040] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is only used to illustrate the technical solution of the present invention, and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A method of testing the three-point bending properties of a composite material, characterized in that, The application discloses a three-point bending performance testing device for composite materials, and relates to the technical field of composite material testing. The device comprises two support point carriers, a mechanical arm, a sliding assembly and a loading head, the two support point carriers are used for placing the composite material to be tested in three-point bending performance testing, the sliding assembly is located around the composite material on the support point carriers, and the loading head is arranged above the two support point carriers. The method comprises the following steps: moving the composite material to the two support point carriers by the mechanical arm; 2. The method of testing the three-point bending performance of a composite material according to claim 1, wherein, sliding the composite material on the support point carriers to a preset position by moving the sliding assembly; applying bending load to the loading point of the composite material by the loading head to perform three-point bending performance testing of the composite material.

3. The method of testing the three-point bending performance of a composite material according to claim 1, wherein, The device further comprises a driving mechanism arranged on the sliding assembly, and the method comprises the following steps: sliding the sliding assembly by the driving mechanism. The sliding assembly comprises a first sliding block and a second sliding block, the two support point carriers are provided with a first track, the lower part of the two support point carriers is provided with a second track, the number of the first sliding blocks is four, every two first sliding blocks are arranged on the first track of one support point carrier and are located on the two sides of the composite material, the number of the second sliding blocks is two, and the second sliding blocks are arranged on the second track and are located on the two sides of the composite material, and the method comprises the following steps:

4. The method of testing the three-point bending performance of a composite material according to claim 1, wherein, sliding the composite material on the first track by the first sliding blocks until the two preset support points of the composite material are in contact with the two support point carriers respectively, and then stopping sliding; sliding the composite material on the second track by the second sliding blocks until the loading point is aligned with the loading head, and then stopping sliding.

5. The method of testing the three-point bending performance of a composite material according to claim 1, wherein, The step of applying bending load to the loading point of the composite material by the loading head comprises the following steps: moving the loading head to the composite material at a preset speed to apply load force on the loading point of the composite material. The end of the mechanical arm is provided with a gripper, the step of moving the composite material to the two support point carriers by the mechanical arm comprises the following steps: grabbing the composite material to be tested by the gripper; 6. The method of testing the three-point bending performance of a composite material according to claim 1, wherein, moving the composite material to the two support point carriers by the mechanical arm; releasing the composite material by the gripper so that the composite material remains on the two support point carriers.

7. A device for testing the three-point bending properties of a composite material, characterized in that The method comprises the following steps: after the composite material is slid to the preset position, the sliding assembly returns to the initial position of the sliding assembly. The device comprises the following components: two support point carriers used for placing the composite material to be tested in three-point bending performance testing; a mechanical arm used for moving the composite material to the two support point carriers; 8. The device for testing the three-point bending performance of a composite material according to claim 7, characterized in that, a sliding assembly located around the composite material on the support point carriers and used for sliding the composite material on the support point carriers to a preset position; a loading head arranged above the two support point carriers and used for applying bending load to the loading point of the composite material. The device further comprises the following components: A driving mechanism is arranged on the sliding assembly to drive the sliding assembly to slide.

9. The device for testing the three-point bending performance of a composite material according to claim 7, characterized in that, The end of the mechanical arm is provided with a gripper for grabbing the composite material.

10. The device for testing the three-point bending performance of a composite material according to claim 7, characterized in that, Further comprising: A height adjusting assembly is arranged below the two support point carriers to adjust the height of the two support point carriers.

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