Fatigue strength measuring tool for carbon-carbon part

Abstract

The utility model discloses a tool for measuring fatigue strength of a carbon-carbon part, which belongs to the related technical field of fatigue strength measurement and comprises a bottom plate, a mounting plate is arranged in the middle of the bottom plate, and the middle of the mounting plate is used for placing the carbon-carbon part; a plurality of mounting seats are arranged on the periphery of the mounting plate, knocking heads are hinged to the mounting seats, balls are movably arranged in the knocking heads, the knocking heads are connected with the lower ends of vertical rods, limiting blocks are arranged in the middles of the vertical rods, seat bodies are arranged at the upper ends of the vertical rods, springs are arranged on the upper portions of the vertical rods, and the springs are arranged between the vertical rods and the seat bodies. A rotating wheel is arranged at the upper end of the seat body; the upper plane of the rotating wheel is a high-low curved surface; the upper end of the seat body penetrates through the seat body and the rotating wheel and then is provided with a connecting block, a connecting seat is arranged in the connecting block, and a roller penetrates through the connecting seat and makes contact with the upper plane of the rotating wheel. The fatigue strength measuring tool is used for solving the technical problem that in the prior art, no special tool exists when the fatigue strength of the carbon-carbon part is measured, so that the measured result is inaccurate.

Description

Technical Field

[0001] The utility model belongs to the technical field related to fatigue strength measurement, in particular to a carbon-to-carbon part fatigue strength measurement tool. Background Art

[0002] Carbon-carbon parts are a type of carbon-based composite material reinforced with carbon fibers. They have excellent properties such as high strength, high stiffness, high heat resistance, high wear resistance, and high corrosion resistance. They are widely used in aerospace, nuclear energy, chemical industry, machinery, and other fields. During their service, carbon-carbon parts are often subjected to cyclic impact loads, which causes fatigue damage and affects their service life and reliability. Therefore, measuring and evaluating the fatigue strength of carbon-carbon parts is an important means to ensure their safety performance and extend their service life.

[0003] Fatigue strength refers to the maximum stress that a material can withstand without being damaged by an infinite number of alternating loads, which is called fatigue strength or fatigue limit. There are two main methods for measuring fatigue strength: direct measurement and indirect measurement. The direct measurement method refers to applying an alternating load to the specimen on a testing machine until the specimen breaks or reaches a specified number of cycles, recording the load and number of cycles, and drawing a fatigue curve to obtain fatigue strength. The indirect measurement method refers to using other mechanical properties of the material, such as elastic modulus, yield strength, fracture toughness, etc., to deduce fatigue strength through empirical formulas or theoretical models.

[0004] At present, there is no special tooling when fatigue strength measurement is performed on the above equipment, which causes inaccurate results. Therefore, a new type of carbon-carbon parts fatigue strength measurement tooling is urgently needed to solve the above problems. Utility Model Content

[0005] In view of the above problems, the utility model provides a carbon-carbon part fatigue strength measuring tool, which is used to solve the technical problem in the prior art that there is no special tool when measuring the fatigue strength of carbon-carbon parts, resulting in inaccurate measured results.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A carbon-carbon parts fatigue strength measuring tool comprises a base plate, a mounting plate is arranged in the middle of the base plate, and the middle of the mounting plate is used to place the carbon-carbon parts; a plurality of mounting seats are arranged around the mounting plate, a striking head is hingedly arranged on the mounting seat, a ball is movably arranged in the striking head, the striking head is connected to the lower end of a vertical rod, a limited position block is arranged in the middle of the vertical rod, a seat body is arranged at the upper end of the vertical rod, a spring is arranged at the upper part of the vertical rod, the spring is arranged between the vertical rod and the seat body, a rotating wheel is arranged at the upper end of the seat body, and the upper plane of the rotating wheel is a high and low curved surface; a connecting block is arranged on the upper end of the seat body after being respectively inserted into the seat body and the rotating wheel, a connecting seat is arranged in the connecting block, a roller is inserted in the connecting seat, and the roller contacts the upper plane of the rotating wheel.

[0008] Compared with the prior art, the utility model has the following beneficial effects: it provides a carbon-carbon part fatigue strength measurement tool, which can measure the fatigue strength of the carbon-carbon part by rotating the rotating wheel so that the four striking heads periodically apply impact force to the carbon-carbon part. The tool has the advantages of simple structure, convenient operation, high efficiency, high precision, good reliability, etc., and can effectively simulate the complex loads in actual working conditions.

[0009] As a further improvement of the above solution, the mounting seat includes a U-shaped block, and a waist-shaped block is arranged at the upper end of the U-shaped block.

[0010] The technical effect of the above improvement is: it is possible to more firmly fix the striking head, facilitate the articulation and movement of the striking head, and improve the flexibility and stability of the tooling.

[0011] As a further improvement of the above solution, the striking head includes a head body, one side of which is connected to a support block, and an insertion rod is provided on the support block, and the insertion rod is inserted into the waist-shaped block and movably connected.

[0012] The technical effect of the above improvement is: ensuring the accuracy of the movement trajectory and impact direction of the striking head, and improving the precision and reliability of the tooling.

[0013] As a further improvement of the above solution, the middle portion of the rotating wheel is arranged as a through hole structure, and the upper end of the seat body is arranged with a boss which is gap-matched with the rotating wheel.

[0014] The technical effect of the above improvement is: the structure of the rotating wheel and the seat body is limited, so that the rotating wheel can be positioned through the cooperation of the boss and the through hole, preventing the rotating wheel from shifting or loosening during rotation, and improving the stability and safety of the tooling.

[0015] As a further improvement of the above solution, the connecting block includes a block body, and a mounting column is arranged on the block body.

[0016] The technical effect of the above improvements is to improve the firmness and durability of the tooling.

[0017] As a further improvement of the above solution, the connecting seat includes a plug-in block and a pin body, a roller is inserted into the plug-in block, and the pin body is inserted into the mounting column.

[0018] The technical effect of the above improvement is: achieving the installation and fixation of the roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of the first perspective of the present invention.

[0020] Figure 2 It is a three-dimensional schematic diagram of the first perspective of the present invention.

[0021] In the figure: 1. bottom plate; 2. carbon-carbon part; 3. mounting seat; 301. U-shaped block; 302. waist-shaped block; 4. striking head; 401. head body; 402. supporting block; 403. interpenetrating rod; 5. vertical rod; 6. limiting block; 7. spring; 8. seat body; 9. rotating wheel; 10. roller; 11. connecting seat; 1101. plug-in block; 1102. pin body; 12. connecting block; 1201. block body; 1202. mounting column; 13. mounting plate; 14. sphere. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution, the technical solution is described in detail below in conjunction with the embodiments. The description in this section is only exemplary and explanatory and should not have any limiting effect on the protection scope of the present utility model.

[0023] See also Figure 1 to Figure 2 In a specific embodiment, a carbon-carbon part fatigue strength measuring tool comprises a base plate 1, a mounting plate 13 is arranged in the middle of the base plate 1, and the middle of the mounting plate 13 is used to place the carbon-carbon part 2; a plurality of mounting seats 3 are arranged around the mounting plate 13, a striking head 4 is hingedly arranged on the mounting seat 3, a ball 14 is movably arranged in the striking head 4, the striking head 4 is connected to the lower end of the vertical rod 5, a limiting block 6 is arranged in the middle of the vertical rod 5, a seat body 8 is arranged at the upper end of the vertical rod 5, a spring 7 is arranged at the upper part of the vertical rod 5, the spring 7 is arranged between the vertical rod 5 and the seat body 8, a rotating wheel 9 is arranged at the upper end of the seat body 8, and the upper plane of the rotating wheel 9 is a high and low curved surface; a connecting block 12 is arranged after the upper end of the seat body 8 is respectively inserted into the seat body 8 and the rotating wheel 9, a connecting seat 11 is arranged in the connecting block 12, a roller 10 is inserted in the connecting seat 11, and the roller 10 contacts the upper plane of the rotating wheel 9.

[0024] Specifically, the carbon-carbon part 2 is placed in the middle of the mounting plate 13, and then the rotating wheel 9 is rotated so that the high and low curved surface of its upper plane drives the roller 10 to change along the height, thereby pushing the connecting seat 11 and the connecting block 12 to move up and down, thereby driving the vertical rod 5 to move up and down alternately, and the spring 7 controls it to return to the lowest point, so that the striking head 4 periodically impacts the carbon-carbon part 2, and its impact fatigue strength is measured by continuously striking the carbon-carbon part 2.

[0025] like Figure 1 As shown, as a preferred embodiment of the above embodiment, the mounting seat 3 includes a U-shaped block 301, and a waist-shaped block 302 is provided at the upper end of the U-shaped block 301. The striking head 4 includes a head body 401, one side of the head body 401 is connected to the support block 402, and the support block 402 is provided with an insertion rod 403, and the insertion rod 403 is inserted in the waist-shaped block 302 and movably connected.

[0026] Specifically, the striking head 4 and the mounting seat 3 are connected in such a way that the insertion rod 403 is inserted into the waist-shaped block 302 for active connection.

[0027] like Figure 1 As shown, as a preferred embodiment of the above embodiment, the middle portion of the rotating wheel 9 is set as a through hole structure, and the upper end of the seat body 8 is provided with a boss which is gap-matched with the rotating wheel 9. Such a structure facilitates the rotation of the rotating wheel 9.

[0028] like Figure 1 As shown, as a preferred embodiment of the above embodiment, the connection block 12 includes a block body 1201, and a mounting column 1202 is provided on the block body 1201. As a preferred embodiment of the above embodiment, the connection seat 11 includes a plug-in block 1101 and a pin body 1102, and the plug-in block 1101 is inserted with a roller 10, and the pin body 1102 is inserted in the mounting column 1202. The structure of the connection block 12 and the connection seat 11 is to connect the roller 10.

[0029] It should be noted that, in this article, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Specific examples are used in this article to illustrate the principle and implementation of the technical solution of the utility model. The above examples are only used to help understand the method and core idea of ​​the utility model. The above are only preferred implementations of the utility model. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, for ordinary technicians in this technical field, without departing from the principle of the utility model, several improvements, modifications or changes can be made, and the above technical features can also be combined in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the protection scope of the utility model.

Claims

1. A carbon-carbon parts fatigue strength measurement tool, characterized in that: The invention comprises a bottom plate (1), a mounting plate (13) is arranged in the middle of the bottom plate (1), and the middle of the mounting plate (13) is used to place the carbon-carbon part (2); a plurality of mounting seats (3) are arranged around the mounting plate (13), a striking head (4) is hingedly arranged on the mounting seat (3), a ball (14) is movably arranged in the striking head (4), the striking head (4) is connected to the lower end of a vertical rod (5), a limiting block (6) is arranged in the middle of the vertical rod (5), a seat body (8) is arranged at the upper end of the vertical rod (5), and the vertical rod (5) is provided with a plurality of mounting seats (3) on the periphery of the mounting plate (13); a striking head (4) is hingedly arranged on the mounting seat (3), a ball (14) is movably arranged in the striking head (4), the striking head (4) is connected to the lower end of the vertical rod (5), a limiting block (6) is arranged in the middle of the vertical rod (5), and a seat body (8) is arranged at the upper end of the vertical rod (5). A spring (7) is arranged at the upper part of the rod (5), and the spring (7) is arranged between the vertical rod (5) and the seat body (8). A rotating wheel (9) is arranged at the upper end of the seat body (8), and the upper plane of the rotating wheel (9) is a high-low curved surface; a connecting block (12) is arranged at the upper end of the seat body (8) after being inserted into the seat body (8) and the rotating wheel (9), respectively, and a connecting seat (11) is arranged in the connecting block (12), and a roller (10) is inserted in the connecting seat (11), and the roller (10) contacts the upper plane of the rotating wheel (9).

2. A carbon-carbon parts fatigue strength measurement tool according to claim 1, characterized in that: The mounting seat (3) comprises a U-shaped block (301), and a waist-shaped block (302) is arranged at the upper end of the U-shaped block (301).

3. A carbon-carbon parts fatigue strength measurement tool according to claim 2, characterized in that: The striking head (4) comprises a head body (401), one side of the head body (401) is connected to a support block (402), an insertion rod (403) is arranged on the support block (402), and the insertion rod (403) is inserted into the waist-shaped block (302) for active connection.

4. A carbon-to-carbon parts fatigue strength measurement tool according to claim 1, characterized in that: The middle part of the rotating wheel (9) is arranged as a through hole structure, and the upper end of the seat body (8) is arranged with a boss which is clearance-matched with the rotating wheel (9).

5. The carbon-carbon parts fatigue strength measurement tool according to claim 1, characterized in that: The connection block (12) comprises a block body (1201), and a mounting column (1202) is arranged on the block body (1201).

6. A carbon-to-carbon parts fatigue strength measurement tool according to claim 5, characterized in that: The connecting seat (11) comprises a plug-in block (1101) and a pin body (1102), a roller (10) is inserted into the plug-in block (1101), and the pin body (1102) is inserted into the mounting column (1202).

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