Detection device and detection method for low-temperature mechanical property of reinforcing steel bar

Abstract

The invention discloses a reinforcing steel bar low-temperature mechanical property detection device, and relates to the technical field of reinforcing steel bar detection. The reinforcing steel bar low-temperature mechanical property detection device comprises a machine base, an inverted-U-shaped machine frame is fixedly connected to the top face of the machine base, a detection box is installed on the machine frame, a lower jaw is fixedly installed on the bottom face in the detection box, an upper jaw is movably connected to the top face in the detection box, and a lifting beam is slidably connected to the interior of the machine frame. The side, close to the detection box, of the lifting beam is fixedly connected with a stretching rod, and the end, close to the detection box, of the stretching rod slidably penetrates through the detection box and is fixedly connected with the upper jaw. The method has the advantages that an engineer can better design and evaluate the safety of the structure, the operation is simple and convenient, the detection method has clear steps, the equipment operation is relatively simple, the technical requirements on operators are reduced, and the detection efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of steel bar detection, and in particular to a detection method for a steel bar low-temperature mechanical property detection device. Background Art

[0002] In many cold regions, the use environment of steel bars is often in a low temperature state. However, the mechanical properties of steel bars will change at low temperatures, which may have a significant impact on the safety and reliability of engineering structures. Traditional steel bar mechanical property testing is usually carried out at room temperature, which is difficult to accurately reflect the actual performance of steel bars in low temperature environments.

[0003] At present, although there are some detection methods and equipment for low temperature environments, there are problems such as low detection accuracy, complex operation, and high cost. Therefore, the development of a device and method specifically for low-temperature tensile testing of steel bars is of great significance to ensure the quality and safety of engineering construction in cold regions. Utility Model Content

[0004] The purpose of the invention is to solve at least one of the technical problems existing in the prior art and to provide a detection method for a steel bar low-temperature mechanical properties detection device, which can solve the problems of low measurement accuracy, complex operation and high cost.

[0005] To achieve the above-mentioned purpose, the invention provides the following technical solutions: a device for testing the low-temperature mechanical properties of steel bars, comprising a machine base, the top surface of the machine base is fixedly connected to an inverted "U"-shaped frame, a test box is installed on the frame, a lower jaw is fixedly installed on the bottom surface of the test box, an upper jaw is movably connected to the top surface of the test box, a lifting beam is slidably connected to the inside of the frame, a stretching rod is fixedly connected to the side of the lifting beam close to the test box, an end of the stretching rod close to the test box slides through the test box and is fixedly connected to the upper jaw, the lifting beam is driven by an external oil cylinder, and a pressure plate is fixedly installed on the top surface of the machine base.

[0006] Preferably, a method for testing the low-temperature mechanical properties of steel bars comprises the following method steps: S1: equipment inspection, checking whether the various components of the tensile testing device are intact, including the clamp, sensor, and control system. Ensure that the equipment can operate normally and the accuracy meets the requirements, and check the low-temperature environment control equipment, such as a cryogenic box or a liquid nitrogen container, to ensure that it can stably provide the required low-temperature environment;

[0007] S2 Sample preparation: Select representative samples from the steel bars to be tested. The length and diameter of the samples should meet the requirements of relevant standards. Perform surface treatment on the samples to remove rust, oil and impurities to ensure that the surface of the samples is flat and smooth.

[0008] S3 Environmental preparation: Place the tensile testing device on a stable and horizontal workbench and ensure that the surrounding environment is free of vibration and strong magnetic field interference. According to the test requirements, set the low-temperature environment control equipment to the required low-temperature temperature and stabilize it for a period of time to ensure that the entire test environment reaches a stable low-temperature state.

[0009] S4 installs the sample, installs the processed sample on the fixture of the tensile testing device, ensures that the sample is clamped firmly and the axis of the sample is consistent with the tensile direction;

[0010] S5 sets parameters, according to the specifications of the sample and the test requirements, sets corresponding parameters in the control system of the tensile testing device, such as the tensile speed and the maximum tensile force;

[0011] S6 starts the test, starts the tensile testing device, and stretches the sample at a set speed in a low temperature environment. During the test, the tensile force and deformation parameters of the sample are monitored in real time and recorded;

[0012] S7 Observe the phenomenon. During the test, observe the deformation and fracture characteristics of the sample, and record the fracture position and fracture mode of the sample;

[0013] S8 ends the test. When the sample breaks or reaches the set maximum tensile force, the tensile testing device is stopped and the broken sample is taken out for further observation and analysis.

[0014] Preferably, data processing and result analysis are performed after S1-S8 are completed.

[0015] Preferably, the data processing draws a tension-deformation curve based on the recorded tension and deformation data, and calculates the yield strength, tensile strength, and elongation mechanical performance indicators of the sample.

[0016] Preferably, the result analysis compares the mechanical performance indicators at low temperature with those at normal temperature, analyzes the impact of low temperature on the mechanical properties of steel bars, and determines whether the mechanical properties of steel bars in a low temperature environment meet the requirements of relevant standards based on the test results.

[0017] Preferably, a test report is written after the data processing and result analysis.

[0018] Preferably, the test report should include the purpose of the test, the test method, the test results, and the result analysis. The report should clearly give the mechanical performance indicators of the steel bars in a low temperature environment and determine whether they meet the standard requirements.

[0019] Preferably, the test report should be signed by the test personnel and stamped with the official seal of the testing unit.

[0020] Compared with the prior art, the invention has the following beneficial effects:

[0021] 1. The detection method of the low-temperature mechanical properties detection device of steel bars can accurately evaluate: the detection device and method can accurately measure the mechanical properties of steel bars in low-temperature environments, provide reliable data support for engineering construction in cold areas, and help engineers better design and evaluate the safety of structures. At the same time, it is easy to operate: the detection method has clear steps and the equipment operation is relatively simple, which reduces the technical requirements for operators and improves detection efficiency.

[0022] 2. The detection method of the low-temperature mechanical properties detection device of steel bars. The equipment and detection method are stable and reliable: through strict equipment inspection and environmental preparation, it is ensured that the detection process is carried out in a stable low-temperature environment, which improves the stability and reliability of the detection results.

[0023] 3. The detection method of the low-temperature mechanical properties detection device of steel bars can carry out data processing and result analysis after detection, and can conduct comparative analysis: the mechanical performance indicators at low temperature can be compared with those at normal temperature, so as to gain an in-depth understanding of the influence of low temperature on the performance of steel bars, provide a basis for improving steel bar materials and engineering design, and thus ensure the quality: it helps to ensure that the quality of steel bars used in cold areas meets the standard requirements, and reduce engineering quality problems and safety hazards caused by insufficient steel bar performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The invention is further described below in conjunction with the accompanying drawings and embodiments:

[0025] Figure 1 It is a schematic diagram of the structure of the device body of the invention.

[0026] Figure numerals: 1, machine base; 2, frame; 3, detection box; 4, upper jaw; 5, lower jaw; 6, pressure plate; 7, lifting beam; 8, stretching rod. DETAILED DESCRIPTION

[0027] This section will describe in detail the specific embodiments of the invention. The preferred embodiments of the invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the invention, but it cannot be understood as a limitation on the scope of protection of the invention.

[0028] In the description of the invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the invention.

[0029] In the description of the invention, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0030] In the description of the invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meaning of the above terms in the invention based on the specific content of the technical solution.

[0031] See also Figure 1 The invention provides a technical solution: a steel bar low temperature mechanical property testing device, comprising a machine base 1, the top surface of the machine base 1 is fixedly connected with an inverted "U"-shaped frame 2, a test box 3 is installed on the frame 2, a lower jaw 5 is fixedly installed on the bottom surface of the test box 3, an upper jaw 4 is movably connected to the top surface of the test box 3, a lifting beam 7 is slidably connected to the inside of the frame 2, a stretching rod 8 is fixedly connected to the side of the lifting beam 7 close to the test box 3, an end of the stretching rod 8 close to the test box 3 slides through the test box 3 and is fixedly connected to the upper jaw 4, the lifting beam 7 is driven by an external oil cylinder, and a pressure plate 6 is fixedly installed on the top surface of the machine base 1;

[0032] Furthermore, a method for testing the low-temperature mechanical properties of steel bars includes the following method steps: S1: equipment inspection, checking whether the various components of the tensile testing device are intact, including the clamp, sensor, control system, etc. Ensure that the equipment can operate normally and the accuracy meets the requirements, check the low-temperature environment control equipment, such as a cryogenic box or a liquid nitrogen container, to ensure that it can stably provide the required low-temperature environment;

[0033] S2 Sample preparation: Select representative samples from the steel bars to be tested. The length and diameter of the samples should meet the requirements of relevant standards. Perform surface treatment on the samples to remove rust, oil and other impurities to ensure that the surface of the samples is flat and smooth.

[0034] S3 Environmental preparation: Place the tensile testing device on a stable and horizontal workbench and ensure that the surrounding environment is free of vibration and strong magnetic field interference. According to the test requirements, set the low-temperature environment control equipment to the required low-temperature temperature and stabilize it for a period of time to ensure that the entire test environment reaches a stable low-temperature state.

[0035] S4 installs the sample, installs the processed sample on the fixture of the tensile testing device, ensures that the sample is clamped firmly and the axis of the sample is consistent with the tensile direction;

[0036] S5 sets parameters, according to the specifications of the sample and the test requirements, sets corresponding parameters in the control system of the tensile testing device, such as the tensile speed and the maximum tensile force;

[0037] S6 starts the test, starts the stretching test device, and stretches the sample at a set speed in a low temperature environment. During the test, the sample's tension, deformation and other parameters are monitored in real time and recorded;

[0038] S7 Observe the phenomenon. During the test, observe the deformation and fracture characteristics of the sample, and record the fracture position and fracture mode of the sample.

[0039] S8 ends the test. When the sample breaks or reaches the set maximum tensile force, the tensile testing device is stopped and the broken sample is taken out for further observation and analysis.

[0040] Furthermore, after S1-S8, data processing and result analysis are performed;

[0041] Among them, data processing, based on the recorded tension and deformation data, draw the tension-deformation curve and calculate the mechanical properties of the sample such as yield strength, tensile strength, elongation, etc.

[0042] Among them, the result analysis compares the mechanical performance indicators at low temperature with those at room temperature, analyzes the impact of low temperature on the mechanical properties of steel bars, and judges whether the mechanical properties of steel bars in low temperature environment meet the requirements of relevant standards based on the test results;

[0043] Furthermore, the test report is written after data processing and result analysis;

[0044] The test report should include the test purpose, test method, test results, and result analysis. The report should clearly state the mechanical performance indicators of the steel bars in a low temperature environment and determine whether they meet the standard requirements.

[0045] Among them, the test report should be signed by the test personnel and stamped with the official seal of the testing unit;

[0046] Furthermore, the scheme can accurately evaluate: the detection device and method can accurately measure the mechanical properties of steel bars in low temperature environments, provide reliable data support for engineering construction in cold regions, and help engineers better design and evaluate the safety of structures. At the same time, the operation is simple: the detection method has clear steps and the equipment operation is relatively simple, which reduces the technical requirements for operators and improves the detection efficiency;

[0047] Furthermore, the equipment and testing method are stable and reliable: through strict equipment inspection and environmental preparation, the testing process is ensured to be carried out in a stable low-temperature environment, which improves the stability and reliability of the test results;

[0048] Furthermore, data processing and result analysis after testing can enable comparative analysis: the mechanical performance indicators at low temperature can be compared with those at normal temperature, in order to gain a deeper understanding of the impact of low temperature on steel performance, provide a basis for improving steel materials and engineering design, and thus ensure quality: it helps to ensure that the quality of steel bars used in cold areas meets standard requirements and reduce engineering quality problems and safety hazards caused by insufficient steel performance.

[0049] The embodiments of the invention are described in detail above with reference to the accompanying drawings, but the invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the spirit of the invention.

Claims

1. A steel bar low temperature mechanical property testing device, comprising a machine base (1), characterized in that: The top surface of the machine base (1) is fixedly connected to an inverted "U"-shaped frame (2), an inspection box (3) is installed on the frame (2), a lower jaw (5) is fixedly installed on the bottom surface of the inspection box (3), an upper jaw (4) is movably connected to the top surface of the inspection box (3), a lifting beam (7) is slidably connected to the inside of the frame (2), a stretching rod (8) is fixedly connected to the side of the lifting beam (7) close to the inspection box (3), an end of the stretching rod (8) close to the inspection box (3) slides through the inspection box (3) and is fixedly connected to the upper jaw (4), the lifting beam (7) is driven by an external oil cylinder, and a pressure plate (6) is fixedly installed on the top surface of the machine base (1).

2. A method for testing the low temperature mechanical properties of steel bars, characterized in that: It includes the following method steps: S1 Equipment inspection: Check whether all parts of the tensile testing device are intact, including the fixture, sensor, and control system. Ensure that the equipment can operate normally and the accuracy meets the requirements. Check the low-temperature environment control equipment, such as the cryogenic box or liquid nitrogen container, to ensure that it can stably provide the required low-temperature environment; S2 Sample preparation: Select representative samples from the steel bars to be tested. The length and diameter of the samples should meet the requirements of relevant standards. Perform surface treatment on the samples to remove rust, oil and impurities to ensure that the surface of the samples is flat and smooth. S3 Environmental preparation: Place the tensile testing device on a stable and horizontal workbench and ensure that the surrounding environment is free of vibration and strong magnetic field interference. According to the test requirements, set the low-temperature environment control equipment to the required low-temperature temperature and stabilize it for a period of time to ensure that the entire test environment reaches a stable low-temperature state. S4 installs the sample, installs the processed sample on the fixture of the tensile testing device, ensures that the sample is clamped firmly and the axis of the sample is consistent with the tensile direction; S5 sets parameters, according to the specifications of the sample and the test requirements, sets corresponding parameters in the control system of the tensile testing device, such as the tensile speed and the maximum tensile force; S6 starts the test, starts the tensile testing device, and stretches the sample at a set speed in a low temperature environment. During the test, the tensile force and deformation parameters of the sample are monitored in real time and recorded; S7 Observe the phenomenon. During the test, observe the deformation and fracture characteristics of the sample, and record the fracture position and fracture mode of the sample; S8 ends the test. When the sample breaks or reaches the set maximum tensile force, the tensile testing device is stopped and the broken sample is taken out for further observation and analysis.

3. A method for detecting low temperature mechanical properties of steel bars according to claim 2, characterized in that: After the completion of S1-S8, data processing and result analysis are performed.

4. A method for detecting low temperature mechanical properties of steel bars according to claim 3, characterized in that: The data processing is to draw a tension-deformation curve based on the recorded tension and deformation data, and calculate the yield strength, tensile strength and elongation mechanical performance indicators of the sample.

5. A method for detecting low temperature mechanical properties of steel bars according to claim 3, characterized in that: The result analysis compares the mechanical performance indicators at low temperature with those at normal temperature, analyzes the impact of low temperature on the mechanical properties of steel bars, and determines whether the mechanical properties of steel bars in a low temperature environment meet the requirements of relevant standards based on the test results.

6. A method for detecting low temperature mechanical properties of steel bars according to claim 3, characterized in that: After the data processing and result analysis, a test report is written.

7. A method for detecting low temperature mechanical properties of steel bars according to claim 6, characterized in that: The test report should include the purpose of the test, the test method, the test results, and the analysis of the results. The report should clearly give the mechanical properties of the steel bars in a low temperature environment and determine whether they meet the standard requirements.

8. A method for detecting low temperature mechanical properties of steel bars according to claim 6, characterized in that: The test report should be signed by the tester and stamped with the official seal of the testing unit.

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