500kN Steel Strand Relaxation Tester

Product introduction:

During the design process, the 600KN microcomputer-controlled tensile stress relaxation testing machine has absorbed the design concept and structural characteristics of famous relaxation testing machine companies such as Germany and Italy, and according to ISO 15630-3:2010, steel for the reinforcement and prestressing ofconcrete-Test methods-Part 3; Prestressing Steel, MOD. The machine is mainly used for relaxation test of prestressing Steel strand, metal wire and other materials, it can be used to test the relaxation strength of rebar and other metal wires under uniaxial tension. The design of the main engine and auxiliary equipment of the test machine uses the advanced technology of Shimadzu in Japan for reference, which has beautiful appearance, convenient operation and stable and reliable performance. The computer system controls the rotation of the servo motor through the star controller and the speed regulating system. After the deceleration system decelerates, the moving beam is driven forward and backward by the precision lead screw pair to complete the relaxation mechanical property test of the sample, no pollution, low noise, high efficiency, with a very wide speed range and beam moving distance. The machine is widely used in construction materials, aerospace, mechanical manufacturing and other industries of metal materials inspection and analysis, quality inspection departments is the ideal test equipment.

Main technical indicators:

1. Maximum test force: 500kN

2. Effective load measurement range: 50 ~ 500kN

3. Load measurement accuracy: better than ±1% of the indicated value

4. Test force error: ≤±0.5%

5. Load resolution: 0.01kN (full scale is not divided, load resolution remains unchanged)

6. Deformation measurement range: ≥25mm

7. Displacement measurement accuracy: better than ±1% of the indicated value

8. Temperature sensor accuracy: ±0.3℃

9. Resolution of temperature sensor: 0.1℃

10. Noise: ≤35dB

11. Loading speed: 100～5000N/S, set arbitrarily

12. Effective stroke: 200mm

13 Power supply: voltage 380V±10%, 220V±10%, 50HZ; power 5.0kW

1. Real-time plotting of the relationship curve between the remaining test force and time, and the change curve of temperature and time;

2. The stress relaxation performance of the specimen can be calculated for 1000 hours. The calculation method has double logarithmic and single logarithmic options, and the estimated data includes all data and data options corresponding to characteristic time points;

3. The loading rate can be set arbitrarily;

4. With constant load and constant displacement control functions;

5. It can automatically obtain the stress relaxation properties of the specimen (such as stress relaxation rate, relaxation stress, relaxation rate, etc.) and print out a complete test report and test curve;

6. It can quickly and accurately realize the digital calibration of the load, and has the function of overload protection;

7. Test conditions (sample environment, test conditions) are programmable;

8. It has the function of storing test results, and being able to view and traverse the test process;

9. Curve coordinate automatic adjustment function: When entering the test state, the system automatically adjusts the coordinate value. During the whole test process, it is always a complete curve.

10. The sample conditions can be automatically stored, automatically recalled, and can also be reset;

11. Data Picking: After the test, the mouse can be used to pick up the data on the test curve

1. One host of relaxation testing machine (including one set of four-column reaction force frame and one set of high-precision spoke-type sensor)

2. A pair of stretching clamps

3. High-precision displacement measuring device

4. High-precision electronic extensometer: original standard 100mm, maximum deformation 50mm

5. Special fixture for steel strand: Φ12.7, Φ15.2 each set

6. Optional fixture: high-strength tension ring with internal thread or stepped tension ring

1. The equipment adopts the closed-loop control of the control mode and the program control of the test process, and can switch between various control modes without impact. The computer automatically completes the control, data acquisition, display and storage of the test process (main parameters: test force, relaxation force, relaxation rate or logarithmic relaxation rate). After the test is completed, the data can be analyzed and processed, and printed out Test curve and test report, you can choose various test curves required by the standard (remaining test force or logarithmic residual force, relaxation force or logarithmic relaxation force, relaxation rate or logarithmic relaxation rate, temperature, etc. with time or logarithmic force can be drawn time curve).

2. The computer software is developed based on the Windows98/Windows2000/Windows XP/Win10 platform, with beautiful interface and convenient operation; the test force and deformation display are displayed by the configuration instrument, which is very eye-catching; the embedded database is convenient for data history traceability and networking requirements; report form The template operation is adopted, and users can master it with simple training. The whole software is highly encapsulated, easy to operate, and has comprehensive functions; there is a standard test program, and by pressing the shortcut key, the test system can be completed within 3-5 minutes according to the standard requirements. Load the steel strand with 70% or 80% of the nominal maximum force, and automatically start recording the test data within 1 minute, and automatically terminate the test when the set time is reached. The correlation coefficient between the test curve and the theoretical fitting curve is more than 99%, so the computer can calculate the test result of 1000 hours with the test data within 100 hours, and can also carry out 1000 hours of continuous test, which shortens the actual test time.

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