Calibration tool for horizontal compression-shear testing machine

Abstract

The utility model relates to the technical field of calibration tools, and provides a calibration tool for a horizontal compression-shear testing machine, which comprises a first mounting plate used for abutting against a compression-shear surface of the compression-shear testing machine, a mounting stop block arranged in the middle of the first mounting plate, a plurality of pressure sensors respectively arranged on two sides of the mounting stop block, and a plurality of pressure sensors respectively arranged on the two sides of the mounting stop block. The pressure stop block abuts against the pressure sensor, and the second mounting plate is arranged above the pressure stop block and used for abutting against the other compression-shear face of the compression-shear testing machine. By means of the technical scheme, the problem that in the prior art, a sensor of a horizontal compression-shear testing machine needs to be calibrated after being detached is solved.

Description

Technical Field

[0001] This utility model relates to the field of calibration tooling technology, specifically to a calibration tooling for a horizontal compression shear testing machine. Background Technology

[0002] Traditional calibration methods often require disassembling the sensor from the compression-shear testing machine and transporting it to specialized calibration equipment. This process involves complex disassembly steps, which can easily damage the sensor's connections and sensitive elements. For example, it may cause loose connections or slight displacement of internal sensitive elements, thus affecting the sensor's subsequent performance and lifespan. Moreover, reinstalling the sensor requires a significant amount of time for debugging to ensure accurate installation and normal operation. The entire process is cumbersome, time-consuming, and labor-intensive, greatly increasing labor costs.

[0003] Regarding the calibration environment, since the sensor is disassembled and calibrated on a calibration bench, the environment differs significantly from the actual working environment of the compression-shear testing machine. For example, the pressure application method, transmission path, and the influence of surrounding mechanical structures are completely different. This means that when the calibrated sensor is reinstalled in the testing machine, measurement deviations may occur due to the change in operating conditions. It cannot be guaranteed that it will be able to measure accurately under actual working conditions, resulting in a significant reduction in the reliability of the calibration results and making it difficult to meet the requirements for accurate data in scientific research and high-precision engineering quality testing.

[0004] In terms of efficiency and timeliness, traditional calibration methods are lengthy and complicated. Especially in scenarios where testing machines need to be calibrated frequently, such as when the accuracy requirements of tests at different stages of scientific research projects are constantly changing, or when a large number of test pieces are rapidly tested in industrial production, calibration according to traditional procedures often delays subsequent tests or inspections and cannot guarantee that the testing machine is always available, which seriously affects the overall work efficiency.

[0005] Furthermore, traditional calibration methods often rely on single sensor monitoring, which can only acquire pressure information at limited locations and cannot comprehensively reflect the pressure distribution in various areas of the horizontal compression-shear testing machine during the compression-shear process. This makes it insufficiently precise in judging the measurement accuracy of the testing machine and in detecting potential problems. It is difficult to detect and locate subtle faults in sensors, such as sensitivity drift, zero-point offset, and deterioration in linearity, which in turn affects the accuracy of the entire compression-shear testing machine measurement system, reduces the quality of test data, and is also not conducive to effective maintenance and performance assurance of the testing machine.

[0006] Furthermore, under traditional calibration methods, the lack of a stable installation structure to ensure the stability of the relative positions of each component during the calibration process makes it easy for external vibrations, loose installation, and other factors to cause deviations in pressure transmission, resulting in calibration errors. Moreover, the repeatability of calibration operations is poor, and the results of each calibration may fluctuate significantly, making it difficult to achieve the expected calibration effect and hindering the maintenance of long-term stable and accurate measurement performance of the testing machine. Utility Model Content

[0007] This invention proposes a calibration fixture for a horizontal compression-shear testing machine, which solves the problem in related technologies that the sensor calibration of a horizontal compression-shear testing machine requires disassembly before calibration.

[0008] The technical solution of this utility model is as follows:

[0009] A calibration fixture for a horizontal compression-shear testing machine includes:

[0010] The first mounting plate is used to abut against one of the compression-shear surfaces of the compression-shear testing machine.

[0011] The mounting block is located in the middle of the first mounting plate.

[0012] A plurality of pressure sensors are provided, and the plurality of pressure sensors are respectively disposed on both sides of the mounting block.

[0013] A pressure stop block is provided, which abuts against the pressure sensor.

[0014] The second mounting plate is disposed above the pressure stop and is used to abut against another pressure-shear surface of the pressure-shear testing machine.

[0015] As a further technical solution, it also includes:

[0016] A fixing bolt is used to connect the first mounting plate, the mounting block, the pressure block, and the second mounting plate into a whole.

[0017] As a further technical solution, it also includes:

[0018] The positioning pins are a plurality of pins, which are disposed on the first mounting plate, and the pressure sensor is disposed on the positioning pins.

[0019] As a further technical solution, the first mounting plate has a plurality of mounting holes, and the positioning pin is disposed in the mounting holes.

[0020] As a further technical solution, the mounting block is located in the middle of the first mounting plate and the second mounting plate, and a plurality of pressure sensors are symmetrically arranged along the mounting block.

[0021] As a further technical solution, the second mounting plate has two limiting parts, which are symmetrically arranged along the mounting block.

[0022] As a further technical solution, an installation space is formed between the two limiting parts, the pressure block is located in the installation space, and the two end faces of the pressure block are aligned with the two end faces of the pressure sensor.

[0023] As a further technical solution, the pressure sensor has a first mounting groove, and the positioning pin extends into the first mounting groove and abuts against the bottom of the first mounting groove.

[0024] As a further technical solution, the ultimate load of the positioning pin is less than the standard load of the pressure sensor.

[0025] As a further technical solution, the first mounting plate has a second mounting groove, and the mounting block is disposed in the second mounting groove.

[0026] The working principle and beneficial effects of this utility model are as follows:

[0027] In this invention, by directly comparing the output value of the pressure sensor with the value of the compression-shear testing machine's own sensor, potential deviations in the sensor can be detected in real time and intuitively. Since both measures pressure simultaneously under identical operating conditions, any discrepancies in the values ​​can be quickly identified. Whether it's sensor sensitivity drift, zero-point offset, or linear degradation due to long-term use, these issues can be precisely pinpointed. Operators can then promptly adjust or repair the testing machine's sensor, ensuring the accuracy of the entire compression-shear testing machine's measurement system, improving the quality of test data, and meeting the high-precision data requirements of scientific research and engineering quality testing.

[0028] Unlike traditional methods that require disassembling sensors, transporting them to specialized calibration equipment, undergoing complex installation, debugging, and calibration processes, and then reinstalling them on the testing machine, this calibration fixture allows for quick initiation of the calibration process simply by mounting the fixture on the testing machine and connecting the wiring. This significantly reduces the time and labor costs required for calibration. In time-sensitive industrial production testing processes or research projects where frequent calibration of the testing machine is necessary, this fixture enables timely and efficient calibration, ensuring the testing machine is always ready for use, preventing delays in subsequent testing, and improving overall work efficiency.

[0029] Frequent disassembly of sensors can cause wear, loosening, or even damage to their connection points and sensitive elements, shortening their lifespan and affecting the overall reliability of the compression-shear testing machine. This calibration fixture avoids unnecessary sensor disassembly, reducing physical damage caused by disassembly, ensuring long-term stable sensor operation, and lowering the frequency of sensor replacement. This not only saves on sensor purchase costs but also allows the testing machine to maintain good performance for extended periods, reducing downtime for maintenance due to sensor failures, increasing the effective operating time of the testing machine, and saving equipment maintenance costs for enterprises and research institutions. Attached Figure Description

[0030] The preferred embodiments will be described below in a clear and easy-to-understand manner, in conjunction with the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages and implementation methods of this utility model.

[0031] Figure 1 This is a schematic diagram of the structure of this utility model;

[0032] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of BB;

[0033] In the figure: First mounting plate-1, mounting hole-101, second mounting groove-102, mounting stop-2, pressure sensor-3, first mounting groove-301, pressure stop-4, second mounting plate-5, limiting part-501, mounting space-502, fixing bolt-6, positioning pin-7. Detailed Implementation

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0035] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0036] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0038] Reference Figures 1-2 This is the first embodiment of the present invention, which proposes a calibration fixture for a horizontal compression-shear testing machine, including a first mounting plate 1 for contacting one compression-shear surface of the compression-shear testing machine, a mounting block 2 disposed in the middle of the first mounting plate 1, a plurality of pressure sensors 3 disposed on both sides of the mounting block 2, a pressure block 4 abutting against the pressure sensors 3, and a second mounting plate 5 disposed above the pressure block 4 for contacting the other compression-shear surface of the compression-shear testing machine.

[0039] In this embodiment, the mounting block 2 is located in the middle of the first mounting plate 1, providing a stable mounting base for the pressure sensor 3. Simultaneously, the pressure block 4 abuts against the pressure sensor 3. This structural design ensures that pressure is effectively transmitted to the sensor and remains stable during transmission. During operation of the compression-shear testing machine, even under external impact or vibration, the tight and stable contact between components prevents deviations in pressure transmission, ensuring that the pressure sensor 3 receives an accurate and stable pressure signal. This reduces measurement errors caused by structural instability, creating favorable conditions for precise calibration of the testing machine and contributing to the long-term stability of calibration results. The first mounting plate 1 abuts against one compression-shear surface of the compression-shear testing machine, and the second mounting plate 5 abuts against the other compression-shear surface. This dual-mounting-plate configuration allows the calibration fixture to be securely mounted on the testing machine, forming a stable load-bearing frame. When subjected to compression and shear forces, the entire fixture will not easily shake or shift, ensuring the fixed relative positions of the components during calibration. This allows key components such as pressure sensor 3 to remain in an accurate working state, improving the accuracy and repeatability of the calibration operation, ensuring that each calibration achieves the expected results, and reducing calibration errors caused by factors such as unstable installation. Several pressure sensors 3, located on both sides of the mounting block 2, allow for monitoring of pressure from multiple points. When the horizontal compression and shear testing machine is operating, pressure sensors 3 at different locations can capture pressure changes in various areas, providing a more comprehensive and detailed reflection of the pressure distribution during the compression and shear process compared to a single sensor. Unlike existing technologies that require removing the sensors for calibration on a calibration table, this calibration fixture allows the two compression and shear surfaces of the compression and shear testing machine to abut against the first mounting plate 1 and the second mounting plate 5, respectively, enabling the sensors to be calibrated in their actual installation and operating state. This means that the pressure application method, transmission path, and the influence of the surrounding environment are highly similar to those during normal use, avoiding differences between the detection and usage states caused by disassembly for calibration.

[0040] By directly comparing the output value of pressure sensor 3 with the value of the compression-shear testing machine's own sensor, potential deviations in the sensor can be detected in real time and intuitively. Since both are measuring pressure simultaneously under identical operating conditions, any discrepancies in the values ​​can be quickly identified. Whether it's sensor sensitivity drift, zero-point offset, or linear degradation due to long-term use, these issues can be accurately pinpointed. Operators can then promptly adjust or repair the testing machine's sensors, ensuring the accuracy of the entire compression-shear testing machine's measurement system, improving the quality of test data, and meeting the high-precision data requirements of scientific research and engineering quality testing.

[0041] Unlike traditional methods that require disassembling sensors, transporting them to specialized calibration equipment, undergoing complex installation, debugging, and calibration processes, and then reinstalling them on the testing machine, this calibration fixture allows for quick initiation of the calibration process simply by mounting the fixture on the testing machine and connecting the wiring. This significantly reduces the time and labor costs required for calibration. In time-sensitive industrial production testing processes or research projects where frequent calibration of the testing machine is necessary, this fixture enables timely and efficient calibration, ensuring the testing machine is always ready for use, preventing delays in subsequent testing, and improving overall work efficiency.

[0042] Frequent disassembly of sensors can cause wear, loosening, or even damage to their connection points and sensitive elements, shortening their lifespan and affecting the overall reliability of the compression-shear testing machine. This calibration fixture avoids unnecessary sensor disassembly, reducing physical damage caused by disassembly, ensuring long-term stable sensor operation, and lowering the frequency of sensor replacement. This not only saves on sensor purchase costs but also allows the testing machine to maintain good performance for extended periods, reducing downtime for maintenance due to sensor failures, increasing the effective operating time of the testing machine, and saving equipment maintenance costs for enterprises and research institutions.

[0043] Furthermore, it also includes fixing bolts 6, which are used to connect the first mounting plate 1, the mounting block 2, the pressure block 4, and the required second mounting plate 5.

[0044] In this embodiment, the fixing bolts 6 connect the first mounting plate 1, the mounting block 2, the pressure block 4, and the second mounting plate 5 together, forming a tight and stable overall structure. During the operation of the horizontal compression-shear testing machine, forces in various directions are generated. This connection method using fixing bolts 6 can effectively resist these external forces and prevent loosening or displacement between components. When the testing machine applies a large compression-shear force, each component can still maintain its accurate relative position, allowing the pressure to be transmitted stably along the expected path. This ensures that the pressure sensor 3 receives an accurate pressure signal, thereby improving the accuracy of calibration and ensuring the smooth progress of calibration work. It is especially suitable for long-term, high-intensity calibration operations.

[0045] Furthermore, it also includes positioning pins 7, of which there are several, and the several positioning pins 7 are set on the first mounting plate 1, and the pressure sensor 3 is set on the positioning pins 7.

[0046] In this embodiment, several positioning pins 7 are disposed on the first mounting plate 1, providing a precise installation positioning reference for the pressure sensor 3. When installing the pressure sensor 3, the operator only needs to place the sensor in the position defined by the positioning pins 7 to ensure that the installation position is highly consistent each time, avoiding sensor position deviation caused by manual installation errors. The accuracy of the sensor position is crucial for calibration work, because only when the position is fixed and accurate can the received pressure signal truly reflect the actual pressure of the testing machine, thereby ensuring the accuracy of the comparison with the value of the testing machine's built-in sensor, improving calibration accuracy, and reducing measurement errors caused by different installation positions. This is especially significant in calibration operations with high precision requirements.

[0047] The positioning pin 7 ensures that the pressure sensor 3 remains stably positioned throughout the calibration and operation of the testing machine, preventing easy displacement or shaking. Even under external impact or vibration during horizontal compression-shear testing, the positioning pin 7 maintains the accurate orientation of the pressure sensor 3 to receive and transmit pressure signals, guaranteeing the stability and reliability of the measurement data. This contributes to obtaining more accurate and repeatable calibration results, providing a strong basis for judging the accuracy of the testing machine's sensors.

[0048] With the locating pin 7, the installation of pressure sensor 3 becomes much simpler and faster. Operators no longer need to use complex measuring tools to repeatedly confirm the sensor's installation position; they simply align the sensor with the locating pin 7 and place it, significantly reducing installation time and improving the overall assembly efficiency of the calibration fixture. For situations requiring frequent fixture installation and disassembly, such as when calibrating multiple testing machines in rotation or reinstalling the fixture after regular maintenance, this convenient installation method saves considerable manpower and time costs, enabling calibration work to be carried out more efficiently.

[0049] Furthermore, the first mounting plate 1 has a plurality of mounting holes 101, and the positioning pin 7 is disposed in the mounting holes 101.

[0050] In this embodiment, the positioning pin 7 is placed within the mounting hole 101, providing a precise and fixed mounting position for the positioning pin 7 itself. This allows the positioning pin 7 to more accurately and reliably position the pressure sensor 3, ensuring that the pressure sensor 3 is always in the ideal position during installation. Compared to simply placing it on the surface of the first mounting plate 1, this method of embedding it into the mounting hole 101 greatly reduces the potential positional displacement of the positioning pin 7 caused by minor external interference such as slight collisions or vibrations, thereby ensuring the high accuracy of the pressure sensor 3's position. This allows the pressure signal received by the pressure sensor 3 during calibration to more accurately reflect the actual pressure of the testing machine, further improving the calibration accuracy. This is especially suitable for high-precision testing scenarios with stringent calibration accuracy requirements.

[0051] The design of the locating pin 7 embedded in the mounting hole 101 creates a tighter connection between it and the first mounting plate 1, enhancing the overall structural strength of the calibration fixture. When the testing machine applies compressive and shear forces, the entire fixture needs to work together to bear and transmit these forces. The locating pin 7 within the mounting hole 101 can better participate in the force transmission process, cooperating with the first mounting plate 1 and other components such as the mounting stop 2 and pressure stop 4 to ensure that the force is transmitted more evenly and smoothly within the fixture. This avoids the risk of component damage caused by excessive local stress, improves the overall ability of the fixture to withstand external forces, and extends the service life of the calibration fixture.

[0052] Furthermore, the mounting block 2 is located in the middle of the first mounting plate 1 and the second mounting plate 5, and several pressure sensors 3 are symmetrically arranged along the mounting block 2.

[0053] In this embodiment, several pressure sensors 3 are symmetrically arranged along the mounting block 2, enabling precise measurement of pressure from multiple symmetrical positions during the operation of the horizontal compression-shear testing machine. This symmetrical layout effectively captures pressure changes at corresponding positions during the compression-shear process, avoiding omissions or deviations in local pressure monitoring due to uneven distribution of measurement points. For example, when the testing machine applies compression-shear force, the data acquired by the symmetrically arranged pressure sensors 3 can be mutually verified and compared. If an abnormal value is found in a sensor on one side, it is easy to determine that there is a problem with pressure transmission in the corresponding area, thereby more accurately grasping the true pressure distribution and improving calibration accuracy, which is especially significant for calibration work requiring high-precision pressure data.

[0054] The mounting block 2 is located in the center, and the symmetrical pressure sensors 3 on both sides can effectively monitor the pressure uniformity across the entire calibration fixture. Ideally, the values ​​measured by the pressure sensors 3 at the symmetrical positions on both sides should be similar. If there is a large difference, it means that there may be uneven stress on the shear surface of the testing machine, or a deviation in the pressure transmission mechanism of the calibration fixture itself. This symmetrical pressure monitoring can promptly detect pressure imbalances and ensure that the pressure is evenly distributed across the entire fixture and the shear surface of the testing machine. This is crucial for ensuring the reliability of the calibration results and the subsequent normal operation and accurate measurement of the testing machine, thus ensuring the scientific validity and effectiveness of the pressure-related data during the test.

[0055] Because the mounting block 2 is located in the center, when the testing machine applies a compressive-shear force, the pressure is transmitted relatively evenly outward from the mounting block 2. The pressure sensors 3, symmetrically arranged on both sides, and surrounding components such as the pressure blocks 4, work together better under this uniform force distribution, jointly bearing and dispersing external forces. This avoids problems such as excessive deformation or damage to components caused by concentrated force on one side or in a localized area. The entire calibration fixture structure is more stable under this symmetrical and uniform force distribution mode, reducing instability factors such as shaking and displacement caused by external forces, ensuring that the pressure sensor 3 can accurately measure pressure in a stable environment.

[0056] The data output by the symmetrically arranged pressure sensors 3 is naturally comparable. During data analysis, operators can directly compare the data from sensors at corresponding positions on both sides. If the data are basically consistent, it indicates that the pressure distribution is uniform and the calibration fixture is working properly. If there is a significant difference, the difference can be quickly focused on to investigate whether it is caused by a faulty sensor, a loose connection, or a problem with the pressure-shear surface of the testing machine. This greatly simplifies the scope and difficulty of troubleshooting, improves the efficiency of finding and solving problems, ensures the smooth progress of calibration work, and reduces the impact of prolonged troubleshooting on the normal use of the testing machine.

[0057] Furthermore, the second mounting plate 5 has two limiting parts 501, which are symmetrically arranged along the mounting block 2.

[0058] Furthermore, an installation space 502 is formed between the two limiting parts 501, and the pressure block 4 is located in the installation space 502. The two end faces of the pressure block 4 are aligned with the two end faces of the pressure sensor 3.

[0059] In this embodiment, an installation space 502 is formed between the two limiting parts 501 to accommodate the pressure stop 4, making the structure of the entire calibration fixture more compact and reasonable. The layout between the components is more compact, reducing unnecessary space occupation. While ensuring the normal functioning of each component, the overall appearance of the calibration fixture is more regular, facilitating storage and transportation. The pressure stop 4 is located within the installation space 502, forming a tightly connected integral structure together with the limiting parts 501 and other components. During the operation of the horizontal compression-shear testing machine, the components can work together. The pressure stop 4 can stably cooperate with the pressure sensor 3. When pressure is transmitted, the force is accurately transmitted to the pressure sensor 3 through their tight contact, realizing the orderly transmission of force within the entire fixture. This avoids problems such as poor force transmission and structural instability caused by loose connections or unreasonable layout between components, improving the overall collaborative working ability of the calibration fixture and ensuring the smooth progress of calibration work. The two end faces of the pressure stop 4 are aligned with the two end faces of the pressure sensor 3. This design ensures precise alignment during pressure transmission. When the pressure applied by the testing machine is transmitted to the pressure stop 4 through relevant components, the pressure can be applied vertically and evenly to the pressure sensor 3 due to the alignment of the end faces. This avoids measurement errors caused by pressure application point offset or uneven force. In this way, the pressure signal received by the pressure sensor 3 can accurately reflect the actual pressure situation, improving the accuracy of pressure measurement during calibration. This also helps to more accurately compare and analyze the output value of the pressure sensor 3 with the value of the testing machine's built-in sensor, thereby accurately determining the accuracy of the testing machine's sensor.

[0060] During pressure transmission, this aligned structure ensures that the pressure is evenly distributed on the contact surface between the pressure baffle 4 and the pressure sensor 3. Whether in the horizontal or vertical direction, the pressure is evenly transmitted to all parts of the pressure sensor 3, preventing excessive local pressure from damaging the sensor. It also ensures that the pressure values ​​received by each pressure sensor 3 are more consistent and stable, facilitating an accurate overall assessment of the pressure conditions under which the calibration fixture is subjected. This provides a strong guarantee for reliable calibration results, and is particularly suitable for calibration operations requiring high pressure uniformity.

[0061] Furthermore, the pressure sensor 3 has a first mounting groove 301, and the positioning pin 7 extends into the first mounting groove 301 and abuts against the bottom of the first mounting groove 301.

[0062] In this embodiment, the positioning pin 7 extends into the first mounting groove 301 of the pressure sensor 3 and abuts against the bottom of the groove, providing a more precise positioning method for the pressure sensor 3. Compared to relying solely on external positioning references, this embedded positioning structure can firmly fix the pressure sensor 3 in a preset accurate position, almost eliminating the possibility of sensor position displacement caused by external factors such as slight vibrations or shaking during tooling handling. This ensures that the position of the pressure sensor 3 is highly consistent after each installation, thereby guaranteeing stable and accurate data when measuring pressure. This greatly improves the accuracy of pressure measurement during calibration and plays a crucial role in the precise calibration of sensors in horizontal compression-shear testing machines.

[0063] Furthermore, the ultimate load of the locating pin 7 is less than the standard load of the pressure sensor 3.

[0064] In this embodiment, the locating pin 7 serves to position the pressure sensor 3 and assist in transmitting force within the entire calibration fixture. Setting its ultimate load to be less than the sensor's standard load means that under normal calibration operations and potential abnormal pressure fluctuations, as long as the pressure sensor 3 continues to function normally and does not exceed the standard load, the locating pin 7 will not deform or break due to excessive force. For example, when the testing machine experiences a brief pressure shock or a sudden increase in pressure due to a malfunction, the locating pin 7 can safely operate within its ultimate load range because the sensor's standard load can accommodate higher pressure values. This avoids damage to its structural integrity due to overload, ensures the stability of the calibration fixture structure, reduces the risk of fixture failure due to damage to the locating pin 7, extends the service life of the calibration fixture, and enables it to reliably serve the calibration work of the horizontal compression-shear testing machine for a long period.

[0065] If the locating pin 7 is damaged due to overload, its originally precise positioning function will be affected, which may cause the pressure sensor 3 to shift position, thereby affecting the accuracy of pressure measurement and the precision of the entire calibration process. By limiting its ultimate load to less than the sensor's standard load, the structural stability of the locating pin 7 can be effectively maintained, ensuring that it can always accurately position the pressure sensor 3, guaranteeing that the sensor is in the correct working position, and ensuring the accuracy of the pressure transmission path and measurement results. This is especially important for high-precision calibration operations, helping to continuously obtain reliable and accurate calibration data.

[0066] Furthermore, the first mounting plate 1 has a second mounting groove 102, and the mounting block 2 is disposed in the second mounting groove 102.

[0067] In this embodiment, the second mounting slot 102 provides a clear and precise reference for the mounting block 2. When assembling the calibration fixture, the operator only needs to place the mounting block 2 into the second mounting slot 102 to ensure that it is in the preset accurate position, avoiding positional deviations that may occur during manual installation. This precise positioning is crucial for the correct installation and functionality of subsequent components of the entire calibration fixture. Because the mounting block 2 is accurately positioned, related components such as the pressure sensor 3 and pressure block 4 can be accurately laid out according to design requirements, thereby ensuring the accuracy of the pressure transmission path and improving the precision of the calibration work. This is especially suitable for applications with high calibration accuracy requirements.

[0068] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A calibration fixture for a horizontal compression-shear testing machine, characterized in that, include: The first mounting plate (1) is used to abut against one of the compression-shear surfaces of the compression-shear testing machine. The mounting block (2) is located in the middle of the first mounting plate (1). Pressure sensors (3), there are several pressure sensors (3), and the several pressure sensors (3) are respectively arranged on both sides of the mounting block (2). A pressure stop (4) is provided to abut against the pressure sensor (3). The second mounting plate (5) is disposed above the pressure stop (4) and is used to abut against another pressure shear surface of the pressure shear tester.

2. The calibration fixture for a horizontal compression-shear testing machine according to claim 1, characterized in that, Also includes: Fixing bolt (6) is used to connect the first mounting plate (1), the mounting block (2), the pressure block (4) and the second mounting plate (5) into a whole.

3. The calibration fixture for a horizontal compression-shear testing machine according to claim 1, characterized in that, Also includes: Positioning pins (7), there are several positioning pins (7), several positioning pins (7) are set on the first mounting plate (1), and the pressure sensor (3) is set on the positioning pins (7).

4. The calibration fixture for a horizontal compression-shear testing machine according to claim 3, characterized in that, The first mounting plate (1) has a plurality of mounting holes (101), and the positioning pin (7) is disposed in the mounting holes (101).

5. The calibration fixture for a horizontal compression-shear testing machine according to claim 1, characterized in that, The mounting block (2) is located in the middle of the first mounting plate (1) and the second mounting plate (5), and a plurality of pressure sensors (3) are symmetrically arranged along the mounting block (2).

6. The calibration fixture for a horizontal compression-shear testing machine according to claim 1, characterized in that, The second mounting plate (5) has a limiting part (501), and there are two limiting parts (501) symmetrically arranged along the mounting block (2).

7. The calibration fixture for a horizontal compression-shear testing machine according to claim 6, characterized in that, An installation space (502) is formed between the two limiting parts (501), and the pressure block (4) is located in the installation space (502). The two end faces of the pressure block (4) are aligned with the two end faces of the pressure sensor (3).

8. The calibration fixture for a horizontal compression-shear testing machine according to claim 3, characterized in that, The pressure sensor (3) has a first mounting groove (301), and the positioning pin (7) extends into the first mounting groove (301) and abuts against the bottom of the first mounting groove (301).

9. The calibration fixture for a horizontal compression-shear testing machine according to claim 3, characterized in that, The ultimate load of the positioning pin (7) is less than the standard load of the pressure sensor (3).

10. A calibration fixture for a horizontal compression-shear testing machine according to claim 1, characterized in that, The first mounting plate (1) has a second mounting groove (102), and the mounting block (2) is disposed in the second mounting groove (102).

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