1. Product overview of microcomputer controlled high-strength bolt tension and torsion testing machine

     Computer-controlled high-strength bolt tension and torsion testing machine, which uses the latest generation of German technology to detect the axial tension of high-strength bolts during torsion, and can detect the pre-tightening force, torsion breaking force, yield axial force, torque, and yield of high-strength bolts. Torque, maximum torque, torsion angle, torque coefficient, and torque/axial force-torsion angle, torque/axial force-time and other test curves.

The machine adopts horizontal floor structure, computer software automatic control, precision test and test system, Taiwan imported AC servo control motor and Taiwan imported AC servo drive, high torque reducer, Taiwan imported precision high rigidity linear guide, high precision two-way torsion sensor The high-precision axial sensor detects torque and axial force. It has the characteristics of large host rigidity, stable and reliable performance, uniform loading and no impact, accurate data collection and control, accurate experimental data, high degree of automation, and long service life. The whole process of preloading, loading, unloading and resetting is controlled by the computer. It is an ideal test for quality supervision, scientific research institutes, wind power photovoltaic, factories and mining enterprises, construction machinery, colleges and universities, power towers, petrochemicals, bridges and dams. equipment.

2. The main parameters of the microcomputer controlled high-strength bolt tension and torsion testing machine

1. The following parameters can be tested:

1) Torque coefficient K;

2) Real-time test of bolt rotation angle θ;

3) Real-time test of torque value T;

4) Real-time test of bolt axial force value F;

5) Real-time detection of axial force, torque, pre-tightening force, ultimate clamping force, tightening torque, yield tightening torque, torsion angle and other indicators;

2. The computer-specific software has the following functions:

1) Torque/axial force-time curve;

2) Torque/axial force-angle curve;

3) Angle/torsion angle-time curve, etc.;

3. Computer software functions also have:

1) Database connection function, you can upload data and connect to the database;

2) Automatically edit and print reports, such as material model, number, batch, operator, date, select required data result, print data and curve, only print data list or only print curve, etc., powerful functions;

3) The test process reproduction function, which can reproduce any stored curve for playback;

4) Automatic analysis of test data and curves, manual intervention, free choice of automatic or manual analysis;

5) A special point on the curve can be analyzed to carry out special analysis of materials;

3. Computer-controlled high-strength bolt tensile and torsion testing machine applicable standards

1. GB/T2611-2007 "General Technical Requirements for Testing Machines"

2. JB/T9370—2007 "Technical Conditions for Torsion Testing Machines"

3. GB/T16823.3-2010 "Tightening test method for threaded fasteners"

4. GB/T1231-2006 "Technical conditions for high-strength large hexagon head bolts, large hexagon nuts and washers for steel structures"

5. GB/T3632-2008 "Torsion shear type high strength bolt connection pair for steel structure"

6.      BS EN14399-2:2005《High-strength structural bolting assemblies for preloading—Part 2: Suitability test for preloading》

Fourth, the main technical indicators of the microcomputer controlled high-strength bolt tension and torsion testing machine

1. Maximum torque: 500N.m

2. Measuring range: 10-500N.m

3. Maximum axial pressure: 200kN

4. Measuring range of axial force: 4-200kN

5. Relative error of test torque indication: better than ±1% of indicated value

6. Torque measurement indication error: better than ±1% of indication

7. Torque repeatability of testing machine: ≤1%

8. Axial force repeatability of testing machine: ≤1%

9. Torque resolution: better than ±1/300000 yards, the whole process is not divided, the resolution remains unchanged

10. Axial force resolution: better than ±1/300000 yards, the whole process is not divided, the resolution is unchanged

11. Coaxiality accuracy between two fixtures: ≤Φ0.2mm

12. Measuring range of torsion angle: 0～unlimited

13. Torsion angle accuracy: ≤0.1°

14. Relative error of torsion angle measurement: within ±1%

15. Torsion speed: 3～360°/min, arbitrarily set, stepless speed regulation

16. Power supply voltage: AC220V±10% 50Hz 

17. Torsion direction: forward and reverse