Contrast block positioning structure

Abstract

The utility model belongs to aviation composite material workpiece nondestructive testing technical field discloses a contrast test block positioning structure. The contrast test block positioning structure includes detection groove body and the module assembly of leaning. Detection groove body is configured to accommodate coupling agent and contrast test block, the module assembly of leaning includes two symmetrical positioning structures, two positioning structures can be installed in the inside of detection groove body, and abut to the inner wall of detection groove body, when contrast test block is set up between two positioning structures, coupling agent can submerge the bottom surface of contrast test block. Detection groove body and the module assembly of leaning mutually cooperate, so that when contrast test block is set up between two positioning structures, coupling agent can submerge the bottom surface of contrast test block, ensure that there is no gap between contrast test block and positioning structure, thereby eliminate the situation that contrast test block bottom wave amplitude is reduced and waveform is deformed in the porosity curve collection process of contact type pulse reflection method due to the flow of coupling agent.

Description

Technical Field

[0001] This utility model relates to the field of non-destructive testing technology for aerospace composite material parts, and in particular to a comparative test block positioning structure. Background Technology

[0002] Porosity is one of the most common defects in the manufacturing process of carbon fiber composites. The presence of porosity reduces the mechanical properties of the material and accelerates the generation and propagation of microcracks. A porosity evaluation curve, plotted by comparing the ultrasonic attenuation value and porosity value of a test block, can be used to assess the porosity of composite parts and determine their quality.

[0003] In existing testing processes, the results of porosity assessment curve acquisition are easily affected by factors such as testing equipment and testing environment, resulting in errors. In the contact pulse reflection method, the coupling agent flows with the testing action. When the coupling agent flows to the pores between the comparison block and the testing table and forms coupling, some of the acoustic energy will continue to propagate along the table. This will cause a significant reduction in the bottom wave amplitude of the comparison block, or even waveform distortion, thus affecting the plotting of the porosity assessment curve. In addition, a complete set of porosity comparison blocks for a certain composite material usually contains multiple sets of blocks with different thicknesses and different porosity values. The current testing method collects data from each block one by one, which is inefficient. If automated equipment is used to collect data from multiple comparison blocks of the same / different thicknesses, the horizontal consistency of multiple testing surfaces cannot be guaranteed. Utility Model Content

[0004] The purpose of this invention is to provide a comparative test block positioning structure that can improve the accuracy of test block porosity evaluation curve acquisition and detection and the possibility of automated detection.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] The comparative test block positioning structure includes:

[0007] The testing tank is configured to hold the coupling agent and the control test block;

[0008] The template assembly includes two symmetrically arranged positioning structures, both of which can be installed inside the detection tank and abut against the inner wall of the detection tank. When the comparison test block is attached and placed between the two positioning structures, the coupling agent can submerge the bottom surface of the comparison test block.

[0009] Preferably, the detection tank is rectangular, and multiple template components are provided along the length of the detection tank, with each comparison test block corresponding to one of the template components.

[0010] Preferably, each of the two positioning structures has a support surface on the side closest to each other, and the two ends of the comparison test block can abut against the two support surfaces in a corresponding manner.

[0011] Preferably, the positioning structure includes:

[0012] The main body has a clearance groove at the bottom;

[0013] An adjusting bolt is rotatably mounted on the body, entering from the top of the body and exiting from the bottom of the clearance groove;

[0014] The movable block has a supporting surface on its top and a connecting part that is slidably disposed in the clearance groove in the vertical direction and screwed to the adjusting bolt. When the adjusting bolt rotates about its own axis, the movable block moves in the vertical direction.

[0015] Preferably, one of the main bodies is provided with a plurality of clearance grooves spaced apart in the horizontal direction, and both the adjusting bolt and the movable block are provided with a plurality of them.

[0016] Preferably, when the template assembly is installed inside the detection tank, the liquid level of the coupling agent is not lower than the supporting surface.

[0017] Preferably, each of the positioning structures is provided with a fitting surface, and the two end faces of the comparison test block can be fitted to the two fitting surfaces in a one-to-one correspondence.

[0018] Preferably, the contact surface is perpendicular to the support surface.

[0019] Preferably, the inner wall of the detection tank is provided with a sliding groove, and the positioning structure is provided with a limiting block, which can extend into the sliding groove and abut against the inner wall of the sliding groove.

[0020] Preferably, the coupling agent is configured as water.

[0021] The beneficial effects of this utility model are:

[0022] The test tank and the template assembly work together to ensure that when the comparison test block is placed between the two positioning structures, the coupling agent can submerge the bottom surface of the comparison test block, ensuring that there are no gaps between the comparison test block and the positioning structures. This eliminates the situation where the bottom wave amplitude of the comparison test block is severely reduced and the waveform is deformed during the porosity curve acquisition process of the contact pulse reflection method due to the flow of coupling agent. Attached Figure Description

[0023] Figure 1 This is a front view of the comparative test block positioning structure described in this utility model;

[0024] Figure 2 This is a side view of the comparative test block positioning structure described in this utility model;

[0025] Figure 3 This is a top view of the comparative test block positioning structure described in this utility model.

[0026] In the picture:

[0027] 100. Comparative test block;

[0028] 1. Testing tank;

[0029] 2. Template assembly; 21. Positioning structure; 210. Fitting surface; 211. Supporting surface; 212. Body; 213. Adjusting bolt; 214. Movable block. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0031] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0034] like Figures 1-3As shown, this utility model provides a comparative test block positioning structure for collecting and detecting the porosity evaluation curve of composite carbon fiber materials. The comparative test block positioning structure includes a detection tank 1 and a template assembly 2. The detection tank 1 is configured to contain a coupling liquid and a comparative test block 100. The template assembly 2 includes two symmetrically arranged positioning structures 21, both of which can be installed inside the detection tank 1 and abut against the inner wall of the detection tank 1. When the comparative test block 100 is fitted and mounted between the two positioning structures 21, the coupling liquid can submerge the bottom surface of the comparative test block 100.

[0035] The test tank 1 and the template assembly 2 work together so that when the comparison test block 100 is attached between the two positioning structures 21, the coupling liquid can submerge the bottom surface of the comparison test block 100, ensuring that there are no gaps between the comparison test block 100 and the positioning structure 21. This eliminates the situation where the bottom wave amplitude of the comparison test block 100 is severely reduced and the waveform is deformed during the porosity curve acquisition process of the contact pulse reflection method due to the flow of coupling agent.

[0036] Specifically, the detection tank 1 is rectangular, and multiple template components 2 are arranged along the length of the detection tank 1, with each comparison test block 100 corresponding to a template component 2. This arrangement allows for the simultaneous detection of multiple comparison test blocks 100 of the same or different thicknesses, thereby improving detection efficiency while ensuring detection accuracy.

[0037] Specifically, each of the two positioning structures 21 has a support surface 211 on its side closest to each other, allowing the two ends of the comparison test block 100 to abut against the two support surfaces 211 one-to-one. The support surfaces 211 eliminate the gap between the comparison test block 100 and the positioning structure 21, thereby ensuring the accuracy of the test and preventing severe reduction in the amplitude of the bottom wave and waveform distortion. It also ensures the horizontal consistency of the test surface, increasing the possibility of automated testing.

[0038] More specifically, each positioning structure 21 is provided with a mating surface 210, and the two end faces of the comparison test block 100 can be mated to the two mating surfaces 210 in a one-to-one correspondence. The above-mentioned mating surface 210 provides the comparison test block 100 with contact with the coupling agent while ensuring the stability of the comparison test block 100 during the testing process and preventing relative slippage.

[0039] Preferably, in this embodiment, the contact surface 210 abuts vertically against the support surface 211. This arrangement ensures that both the contact surface 210 and the support surface 211 can fit against the edges of both ends of the comparison test block 100.

[0040] More specifically, the positioning structure 21 includes a body 212, an adjusting bolt 213, and a movable block 214. The body 212 has a clearance groove at its bottom end; the adjusting bolt 213 is rotatably mounted on the body 212, entering from the top of the body 212 and exiting from the bottom of the clearance groove; a supporting surface 211 is located on the top of the movable block 214, which has a connecting part that is slidably positioned vertically within the clearance groove and screwed to the adjusting bolt 213. When the adjusting bolt 213 rotates around its own axis, the movable block 214 moves vertically. This configuration allows the height of the supporting surface 211 to be adjusted vertically, enabling simultaneous testing of various thickness comparison test blocks 100, providing strong versatility and high operational flexibility. Optionally, the positioning structure 21 may include, but is not limited to, polyethylene or aluminum alloy.

[0041] More specifically, a main body 212 is provided with multiple clearance grooves spaced apart in the horizontal direction, and multiple adjusting bolts 213 and movable blocks 214 are provided. The above configuration allows a main body 212 to support multiple comparison test blocks 100 simultaneously.

[0042] For example, in this embodiment, the movable block 214 is provided with two connecting parts spaced apart in the horizontal direction. Each connecting part is equipped with an adjusting bolt 213 and a relief groove to ensure the stability of the movable block 214.

[0043] More specifically, when the template assembly 2 is installed inside the test tank 1, the liquid level of the coupling agent is not lower than the support surface 211. This configuration ensures that the bottom surface of the comparison test block 100 is in complete contact with the coupling agent, thereby guaranteeing the accuracy of the test.

[0044] Specifically, a sliding groove is provided on the inner wall of the detection tank 1, and a limiting block is provided on the positioning structure 21. The limiting block can extend into the sliding groove and abut against the inner wall of the sliding groove. With the above arrangement, the sliding groove and the limiting block slide together to prevent relative sliding between the positioning structure 21 and the inner wall of the detection tank 1, thereby ensuring stability and detection accuracy.

[0045] For example, in this embodiment, the coupling agent is configured as water. In other embodiments, other coupling agents commonly used in the art may be selected according to the detection requirements, and no specific limitation is made here.

[0046] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. The comparative test block positioning structure is characterized by, include: The test tank (1) is configured to contain the coupling agent and the control test block (100); The template assembly (2) includes two symmetrically arranged positioning structures (21). Both positioning structures (21) can be installed inside the detection tank (1) and abut against the inner wall of the detection tank (1). When the comparison test block (100) is attached between the two positioning structures (21), the coupling agent can submerge the bottom surface of the comparison test block (100).

2. The comparative test block positioning structure according to claim 1, characterized in that, The detection tank (1) is rectangular. Multiple template components (2) are provided along the length of the detection tank (1). The comparison test block (100) corresponds one-to-one with the template component (2).

3. The comparative test block positioning structure according to claim 1, characterized in that, Each of the two positioning structures (21) has a support surface (211) on one side close to the other, and the two ends of the comparison test block (100) can abut against the two support surfaces (211) one by one.

4. The comparative test block positioning structure according to claim 3, characterized in that, The positioning structure (21) includes: The main body (212) has a clearance groove at the bottom; An adjusting bolt (213) is rotatably mounted on the body (212), entering from the top of the body (212) and exiting from the bottom of the clearance groove; The movable block (214) has a supporting surface (211) on its top. The movable block (214) has a connecting part that is slidably disposed in the clearance groove in the vertical direction and screwed to the adjusting bolt (213). When the adjusting bolt (213) rotates around its own axis, the movable block (214) moves in the vertical direction.

5. The comparative test block positioning structure according to claim 4, characterized in that, The main body (212) is provided with a plurality of clearance grooves spaced apart in the horizontal direction, and the adjusting bolt (213) and the movable block (214) are provided with a plurality of them.

6. The comparative test block positioning structure according to claim 3, characterized in that, When the template assembly (2) is installed inside the detection tank (1), the liquid level of the coupling agent is not lower than the support surface (211).

7. The comparative test block positioning structure according to claim 3, characterized in that, Each of the positioning structures (21) is provided with a fitting surface (210), and the two end faces of the comparison test block (100) can be fitted to the two fitting surfaces (210) in a one-to-one correspondence.

8. The comparative test block positioning structure according to claim 7, characterized in that, The bonding surface (210) is perpendicular to the supporting surface (211).

9. The comparative test block positioning structure according to any one of claims 1-8, characterized in that, The inner wall of the detection tank (1) is provided with a sliding groove, and the positioning structure (21) is provided with a limiting block. The limiting block can extend into the sliding groove and abut against the inner wall of the sliding groove.

10. The comparative test block positioning structure according to any one of claims 1-8, characterized in that, The coupling agent is configured as water.

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