1.1 Application：The detector is based on GB/T 2611-2007 "General Technical Requirements for Testing Machines", JB/T 9370-2015 "Technical Conditions for Torsional Testing Machines", JJG 139-2014 "Testing Machine Verification Regulations" and other commonly used national and industry testing machine standards . At the same time, refer to GB/T1231-2006 "Technical Conditions for Large Hexagon Bolts and Large Hexagon Nuts for Steel Structures", GB/T16823.1-2010 "Fastener Torque-Clamping Force Test", GB50205-2001 "Construction Quality of Steel Structure Engineering" "Acceptance Specification", GB/T 32076.2-2015 "Preload High Strength Bolted Structural Connection Pair", EN 14399.2-2005 "Preload High Strength Structural Bolt Assemblies. Part 2: Preload Suitability Test", ASTM A325M-2009 "Standard Specification for Heat Treated Steel Structural Bolts with Heat Treated Minimum Tensile Strength of 830Mpa", ASTM F3215/F3125M-15a "Heat Treated Minimum Tensile Strength of 120 ksi (830 MPa) and 150 ksi (1040 MPa) Standard Specification for Steel and Alloy Steel High Strength Structural Bolts with Inch and Metric Dimensions "AS/NZS1252:1996 "High Strength Bolts for Construction (Bolts with Nuts & Washers)" NB/T31082-2016 "Wind Turbine Towers It can be designed and manufactured according to relevant requirements such as High-strength Bolt Connection Pairs for Racks. It can detect, display and print the axial force, torque and torque coefficient of hexagonal head and double-head high-strength bolt connection pairs. When the axial force reaches the value specified in the standard, the detector will beep and record the peak value of the detection data. After the equipment stays for 1 second, it will automatically reverse and loosen the sample. At the same time, the detector will automatically calculate the torque according to the detected axial force and torque. The coefficient is automatically displayed; when a group of tests is completed, the detector automatically calculates the average axial force, average torque, average torque coefficient, standard deviation and coefficient of variation of N specimens;

1.2 Technical parameters and control methods：

1.2.1 Voltage: control system 220V AC; motor AC 380V

1.2.2 Total motor power: 5.0KW

1.2.3 Output speed: 0.1-4r/min

1.2.4 Axial force detection range: 100-1000kN

1.2.5 Torque detection range: 100-5000Nm

1.2.6 Large hexagon bolt specifications: M10\M12\M16\M20\M24\M27\M30\M36\M39

1.2.7 Bolt length: 30mm---350mm (≥2.5d)

1.2.8 Test accuracy: axial force ±1.0% torque ±1.0%

1.2.9 Torsion angle measurement range 0-1000° (unlimited)

1.2.10 Relative error of indication value of torsion angle ±1%

1.2.11 Relative error of torsion speed Within ±1.0% of the set value

1.2.12 Weight: about 2000kg

1.2.13 Customized measurement and control system*1(meet EN14399-2:2005(E) standard)

1.3 Control method:

1.3.1 The equipment can be controlled by any method such as setting the axial force, setting the torque, and setting the angle of rotation.

1.3.2 It has the function of setting initial torque→first target angle→second target angle, and then testing the torque value and axial force value under each target.