In-situ compression test fixture
By adopting limit track suspension technology in the in-situ compression test fixture, the problem of increasing friction in the low temperature environment of traditional fixtures is solved, and more accurate and stable clamping operation and higher low temperature resistance are achieved.
Patent Information
- Application Number
- CN202420773029.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-15
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-04-15
AI Technical Summary
In the traditional in-situ compression test fixture under extreme conditions such as low temperature environments, the sliding track produces a large friction force, affecting the accuracy and stability of the fixture.
The limit track suspension technology is adopted to achieve non-contact movement of the clamping device through the magnetic repulsive suspension between the magnetic block and the base, and reduce friction.
Effectively reduce friction, improve the accuracy and stability of fixture movement, enhance low temperature resistance, and ensure the accuracy and repeatability of test data.
Smart Images
Figure CN222461180U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of test fixtures, in particular to an in-situ compression test fixture. Background Art
[0002] The in-situ compression test fixture is an important device for material mechanical property research and engineering applications. It can simulate the stress conditions under actual working conditions, perform compression tests on materials by applying pressure, and measure their mechanical property parameters. During the in-situ compression test, friction is an important influencing factor.
[0003] Traditional in-situ compression test fixtures usually use sliding rails to limit the range of motion of the clamping device. However, under extreme conditions such as low temperature environments, the sliding rails are prone to generate large friction, which poses challenges to the accuracy and stability of the fixture. The presence of friction may cause the fixture to move less smoothly, introduce additional errors, and affect the accuracy and repeatability of the test results.
[0004] To this end, we propose an in-situ compression test fixture. Utility Model Content
[0005] The utility model mainly solves the above-mentioned existing technical problems and provides an in-situ compression test fixture.
[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an in-situ compression test fixture, including a detachable box body, which is composed of an experimental box body and an upper and lower part of a sealing cover. Two groups of clamping devices are arranged inside the box body, and non-contact limiting rails are arranged at the bottom of the two groups of clamping devices. The clamping devices are driven by an electro-hydraulic servo controller arranged outside the box body to perform clamping operations on the two limiting rails.
[0007] Preferably, the clamping device includes a moving block and a base in the shape of a "J" at the bottom of the moving block. The limiting track includes a magnetic block located inside the base. The magnetic block and the base are suspended with magnetic repulsion. Adjacent ends of the two moving blocks are provided with docking grooves, and clamping blocks are provided at the openings of the two docking grooves.
[0008] Preferably, the clamp block comprises a T-shaped clamp baffle, the top of the movable block is threadedly connected with a bolt, one end of the clamp baffle is fixed inside the docking groove by the bolt, and the other end of the clamp baffle is provided with a row of anti-slip grooves.
[0009] Preferably, a transparent viewing window is inlaid on the top of the sealing cover.
[0010] Preferably, two groups of fixing holes are opened in the width direction of the experimental box body 1, and the top of the sealing cover is connected with a fixing block inserted into the fixing hole.
[0011] Preferably, two groups of thermal insulation layer bodies are installed at the inner edge of the experimental box body 1, and the thermal insulation layer bodies are made of polystyrene foam material.
[0012] Beneficial Effects
[0013] The utility model provides an in-situ compression test fixture, which has the following beneficial effects:
[0014] (1) This in-situ compression test fixture effectively reduces friction by adopting the limited track suspension technology, making the fixture movement smoother and more precise. The fixture moves in a suspended state without direct contact with the track surface, and the friction is significantly reduced; reducing friction not only makes the fixture movement smoother, but also improves the accuracy of the fixture movement. Excessive friction will introduce non-negligible errors, but the limited track suspension technology effectively eliminates this problem, allowing the fixture to reach the desired position and posture more accurately. Therefore, when conducting in-situ compression tests, this technology can ensure the accuracy and repeatability of test data.
[0015] The limited rail suspension technology brings more precise and stable clamping operation to the in-situ compression test fixture. By reducing friction, this technology improves the accuracy of fixture movement and enhances low temperature resistance, ensuring the accuracy and reliability of test results.
[0016] (2) The in-situ compression test fixture has enhanced low temperature resistance: The limited track suspension technology can maintain a stable working state in an extremely low temperature environment and is not easily affected by changes in ambient temperature. In contrast, the sliding track may cause material creep or increased friction due to low temperature, thereby affecting the movement stability of the fixture. The limited track suspension technology has stronger low temperature resistance and is suitable for testing needs in various extreme environments. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.
[0018] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.
[0019] Figure 1 This is a schematic diagram of the installation of the test fixture of the utility model;
[0020] Figure 2 This is a disassembled diagram of the fixture and the limit track in the test fixture of the utility model;
[0021] Figure 3 This is a schematic diagram of the internal structure of the experimental box of the utility model;
[0022] Figure 4 This is a disassembly diagram of the experimental box body 1 and the sealing cover of the utility model.
[0023] Legend:
[0024] 1. Experimental box body 1; 101. Fixing hole; 102. Insulation layer body; 2. Sealing cover; 201. Visual window; 202. Fixed block; 3. Electro-hydraulic servo controller; 5. Moving block; 501. Docking groove; 502. Base; 6. Magnetic block; 7. Fixture baffle; 701. Tooth groove. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0026] Example: In-situ compression test fixture, such as Figure 1-Figure 4 As shown, it includes a detachable box body, which consists of an experimental box body 1 and a sealing cover 2. Two sets of clamping devices are arranged inside the box body, and non-contact limiting rails are arranged at the bottom of the two sets of clamping devices. The clamping devices are driven by an electro-hydraulic servo controller 3 arranged outside the box body to perform clamping operations on the two limiting rails.
[0027] The clamping device includes a moving block 5 and a base 502 with a "J" shape at the bottom of the moving block 5. The limiting track includes a magnetic block 6 located inside the base 502. The magnetic block 6 and the base 502 are suspended with the same magnetic repulsion. The two adjacent ends of the two moving blocks 5 are provided with docking grooves 501, and the openings of the two docking grooves 501 are provided with clamping blocks. In the traditional in-situ compression test fixture, a sliding track is used to limit the movement range of the clamping device. However, in an extremely low temperature environment, the sliding track is prone to generate a large friction force, which affects the accuracy and stability of the fixture. In order to solve this problem, the limiting track suspension technology is introduced in this technical solution to achieve a more accurate and stable clamping operation.
[0028] Through the limited track suspension technology, the movement of the fixture is realized in a non-contact state. Compared with the traditional sliding track, it has the following improvements and advantages:
[0029] Reduced friction: Traditional sliding rails are prone to increased friction in extremely low temperature environments, resulting in less smooth movement of the fixture and possible introduction of additional errors. The limited rail suspension technology effectively reduces friction, making the fixture movement smoother and more precise. The fixture moves in a suspended state without direct contact with the track surface, significantly reducing friction.
[0030] Improved accuracy: Reducing friction not only makes the fixture movement smoother, but also improves the accuracy of the fixture movement. Excessive friction will introduce non-negligible errors, but the limited track suspension technology effectively eliminates this problem, allowing the fixture to reach the required position and posture more accurately. Therefore, when performing in-situ compression tests, this technology can ensure the accuracy and repeatability of the test data.
[0031] Enhanced low temperature resistance: The limited rail suspension technology can maintain a stable working state in extremely low temperature environments and is not easily affected by ambient temperature changes. In contrast, the sliding rail may cause material creep or increased friction due to low temperatures, thereby affecting the motion stability of the fixture. The limited rail suspension technology has stronger low temperature resistance and is suitable for testing needs in various extreme environments.
[0032] The limited rail suspension technology brings more precise and stable clamping operation to the in-situ compression test fixture. By reducing friction, this technology improves the accuracy of fixture movement and enhances low temperature resistance, ensuring the accuracy and reliability of test results.
[0033] The clamp block includes a T-shaped clamp baffle 7, and the top of the moving block 5 is threadedly connected with a bolt, and one end of the clamp baffle 7 is fixed to the inside of the docking groove 501 by the bolt, and the other end of the clamp baffle 7 is provided with a row of anti-slip tooth grooves 701; by installing the clamp block on the moving block 5 by threaded fixing, when the clamp block is worn out after a long-term clamping experiment, the bolts on the top of the moving block 5 can be directly removed, and the damaged clamp baffle 7 can be removed from the inside of the docking groove 501 and replaced with a new clamp baffle 7, which is convenient for disassembly and assembly and daily maintenance.
[0034] A transparent viewing window 201 is inlaid on the top of the sealing cover 2; by providing the transparent viewing window 201 on the top of the sealing cover 2, the clamping experimental state process inside the box can be observed anytime and anywhere.
[0035] Two groups of fixing holes 101 are opened in the width direction of the experimental box body 1, and the top of the sealing cover 2 is connected with a fixing block 202 inserted into the fixing hole 101.
[0036] Two sets of thermal insulation layer bodies 102 are installed at the inner edge of the experimental box 1 for insulation, and the thermal insulation layer bodies 102 are made of polystyrene foam material.
[0037] The working principle of this utility model:
[0038] Preparation: Place the sample in the test chamber, ensure that the sample is in an environment of minus 150 degrees Celsius, and then close the sealing cover 2.
[0039] Clamping operation: The clamping device starts to move through the drive of the electro-hydraulic servo controller 3. The clamp baffle 7 is fixed in the docking groove 501 to clamp the sample on both sides.
[0040] Limit rail suspension: The movement of the clamping device is realized on the non-contact limit rail. The magnetic block 6 is suspended in the base 502, which reduces the resistance of the clamping device and improves the accuracy. At the same time, the design of the clamp takes into account the expansion and contraction of materials in low temperature environments, and adopts appropriate materials and structures to ensure that stable clamping performance can be maintained at extremely low temperatures.
[0041] Compression test: The clamping device compresses the sample by applying pressure. The sample will show different physical property changes in an environment of minus 150 degrees Celsius, such as increased cold brittleness. The fixture can provide stable clamping and pressure loading at extremely low temperatures to ensure the accuracy of the test data.
[0042] Monitoring and observation: Through the transparent viewing window 201, the operator can observe the state of the clamping experiment at any time, including the deformation of the sample, etc. At the same time, the product can also be equipped with an external temperature sensor and a pressure sensor to monitor the temperature and pressure changes of the sample in real time.
[0043] Advantages of this product design:
[0044] Adapt to extreme low temperature environment: The fixture can work in an extremely low temperature environment of -150 degrees Celsius, adapting to the needs of changes in sample properties under low temperature and ensuring the authenticity and reliability of the test.
[0045] Precise control and stability: Through the design of the electro-hydraulic servo controller 3 and the limit rail, the fixture has precise motion control capabilities and remains stable during movement, reducing additional friction resistance and ensuring that the specimen is subjected to accurate and consistent pressure loading.
[0046] Superior clamping performance: The replaceability and maintenance convenience of the clamp baffle make the clamp more convenient and durable. At the same time, the design of the clamp takes into account the performance changes of materials in low temperature environments, adopts appropriate materials and structures, and maintains stable clamping performance.
[0047] Real-time monitoring function: The transparent viewing window 201 is externally equipped with monitoring equipment such as temperature sensors and pressure sensors connected to the inside of the box, so that the operator can observe the state changes of the sample in real time and obtain accurate test data.
[0048] In summary, the in-situ compression test fixture can provide a high-precision in-situ compression test environment at minus 150 degrees Celsius through its design advantages such as adaptability to extreme low temperature environments, precise control and stability, superior clamping performance, and real-time monitoring functions, ensuring the accuracy and reliability of the test results.
[0049] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.
Claims
1. An in-situ compression test fixture, comprising a detachable box, the box consisting of an experimental box (1) and a sealing cover (2), the characteristics of which are: Two groups of clamping devices are arranged inside the box body, and non-contact limiting tracks are arranged at the bottom of the two groups of clamping devices. The clamping devices are driven by an electro-hydraulic servo controller (3) arranged outside the box body to perform clamping operations on the two limiting tracks.
2. The in-situ compression test fixture according to claim 1, characterized in that: The clamping device comprises a moving block (5) and a base (502) with a "J" shape at the bottom of the moving block (5); the limiting track comprises a magnetic block (6) located inside the base (502); the magnetic block (6) and the base (502) are suspended in a manner of magnetic repulsion; adjacent ends of the two moving blocks (5) are provided with docking grooves (501); and the openings of the two docking grooves (501) are provided with clamping blocks.
3. The in-situ compression test fixture according to claim 2, characterized in that: The clamp block comprises a T-shaped clamp baffle (7), the top of the moving block (5) is threadedly connected with a bolt, one end of the clamp baffle (7) is fixed inside the docking groove (501) by the bolt, and the other end of the clamp baffle (7) is provided with a row of anti-slip tooth grooves (701).
4. The in-situ compression test fixture according to claim 1, characterized in that: A transparent viewing window (201) is inlaid on the top of the sealing cover (2).
5. The in-situ compression test fixture according to claim 1, characterized in that: The experimental box body (1) is provided with two groups of fixing holes (101) in the width direction, and the top of the sealing cover (2) is connected with a fixing block (202) inserted into the fixing hole (101).
6. The in-situ compression test fixture according to any one of claims 1 to 5, characterized in that: Two groups of thermal insulation layer bodies (102) are installed at the inner edge of the experimental box body 1 (1) for heat insulation. The thermal insulation layer bodies (102) are made of polystyrene foam material.