Fastener Torsion Testing Machine

The detector is designed and manufactured according to the requirements of GB/T16823.3 Fastener Torque Clamping Force Test, European Standard EN14399.2C, ISO16047, GB/T32076.2, JGJ 82 Technical Specification for High Strength Bolt Connection of Steel Structures, NB/T31082, GB/T1231, GB/T 50205 Standard for Acceptance of Construction Quality of Steel Structures and JB/T 9370 Technical Conditions for Torsion Testing Machines. It can detect the tightening axial force, tightening torque, torque coefficient, tightening angle, and total friction coefficient of the large hexagon high-strength bolt connection pair (M33-MM64). If one of the end face friction coefficient or thread friction coefficient is predicted, the system can also automatically calculate another friction coefficient. After a group of tests are completed, the tester automatically calculates the average axial force, average torque, average torque coefficient, average friction coefficient, standard deviation and coefficient of variation of N test pieces, displays and prints them. This equipment is mainly used for testing large steel structures and large wind power bolts.

This machine is accurate in testing, powerful in function, convenient in operation, stable and reliable. It is widely used in universities, research institutes, testing institutions, aerospace, military, metallurgy, machinery manufacturing, transportation construction, construction materials and other industries. The process qualification performance verification test of materials or products can be conducted.

 

The new generation - 2022 tester is a new high-strength bolt tester developed by our company according to the development trend of testing machine and market demand. In terms of product development and development, we have carried out the following product upgrades and product innovations:

● New external independent controller - the addition of independent external manual control unit provides a new solution for the measurement, control and operation of the testing machine. RS232 data transmission fully supports notebook computers, tablet computers and desktop computers; It is an important part of leading the development of testing machine technology;

● Equipment operation monitoring system --- with phase sequence, phase loss self inspection indication function, electrical overcurrent, overload and other protection functions, so that the equipment can operate safely and reliably;

● Sample clamping assembly --- the manual pushing and pulling adjustment is changed to servo motor electric debugging, which is more convenient to operate and greatly reduces the labor intensity;

● Power part ------ The cycloidal reducer is changed into a planetary gear reducer, which increases transmission efficiency, reduces energy consumption and reduces noise.

● Axial force testing system - front mounted axial force sensor directly detects the axial force value. This structure avoids the influence of such factors as fixture friction on the axial force value and is more accurate than the rear mounted axial force sensor in the world.

● Safety shield --- a full range of cold-rolled steel punched safety shield to prevent foreign matters from flying out during the test, which is convenient for operators to observe in real time while improving the protection level, and effectively guarantees the personal safety of testers.

 

The detector is mainly composed of host, measurement and control system, computer data processing system, test result output, etc.

(1) Host part

The host part consists of test platform, power output assembly, sample clamping assembly, test fixture and sheet metal protection assembly.

Test platform: it is welded by 45 # steel plate, stress is removed by aging, and is precisely processed by the machining center, thus laying a solid foundation for equipment accuracy

Power output assembly: the servo motor drives the planetary gear reducer to output power, which is stable and powerful, and the speed is controllable, ensuring that the test does not receive other external forces, thus ensuring the test accuracy

Sample clamping assembly: it is welded by 45 # steel plate, stress is removed through aging, and the machining center is precision machined to lengthen the body, thus ensuring the universality of the sample length. The tooling is self centered, without considering the error caused by the test clamping. The length of the sample is electrically adjusted, and the base movement is electrically controlled.

Test fixture: It is forged from special materials and processed by precision machine tools. The final quenching improves the strength, and the surface is blackened and rustproof, greatly improving the service life of the fixture.

Sheet metal protection assembly: through cold plate bending and surface spraying rust prevention treatment, personal safety is guaranteed and the equipment is more beautiful.

 

The external independent controller is a special controller for a new generation of static testing machine, which has been developed by our company for many years. It integrates measurement, control and transmission functions, highly integrates signal acquisition, signal amplification, data transmission and servo drive units, and adds external manual control units to provide a new solution for measurement, control and operation of the testing machine. USB data transmission fully supports notebook computers, tablet computers and desktop computers. It is an important part of leading the development of testing machine technology.

（3） Testing machine measurement and control software

The testing machine measurement and control software adopts DSP technology and neuron adaptive control algorithm to realize multiple closed-loop control modes such as constant rate test force, constant rate angle, constant rate strain, etc. The control mode can be arbitrarily combined and smoothly switched with network interface to realize data networking and remote control functions.

 

4、 Applicable standards

★ GB/T 2611-2007 General Technical Requirements for Testing Machines;

★ JB/T 7406.1-1994 Terminology of Testing Machine Material Testing Machine;

★ JB/T 9370-2015 Technical Conditions for Torsion Testing Machines;

★ JJG269-2006 Torsion Testing Machine;

★ GB/T16823.3-2010 Fastener Torque - Clamping Force Test;

★ JGJ 82-2011 Technical Specification for High Strength Bolt Connection of Steel Structures

★ GB/T 50205-2020 Code for Acceptance of Construction Quality of Steel Structures;

★ NB/T31082-2016 High strength Bolt Connection Sets for Wind Turbine Tower;

 

5、 Main technical parameters

√ Testing machine level: Level 1

√ Axial force range: 100-2500KN;

√ Indication value error of axial force measurement: better than ± 1% of indication value;

√ Repeated error of axial force measurement: better than ± 1% of the indication value;

√ Resolution of axial force sensor: 1/500000FS;

√ Torque range: 1000-30000Nm;

√ Torque measurement indication value error: better than ± 1% of the indication value;

√ Repetition error of torque measurement: better than ± 1% of the indicationvalue;

√ Resolution of torque sensor: 1/500000FS;

√ Angle measurement range: 0 - infinite;

√ Indication value error of angle measurement: better than ± 1% of indication value;

√ Repetition error of angle measurement: better than ± 1% of the indication value;

√ Angle resolution: 0.001 °;

√ Speed regulation range: 0.01-4r/min;

√ Speed indication value error: better than ± 1% of the indication value;

√ Acquisition frequency; 1000HZ;

√ Bolt specification: M33-MM64 (it can be extended to M16-M30 if the configuration is added);

√ Bolt length: 80-1200mm (can be customized according to requirements);

√ Control mode: computer

√ Display mode: computer LCD

√ Overall dimension of host (mm): 3600 * 950 * 1000;

√ Overall weight (kg): about 5000;

√ Total power (kW): 16.0;

√ Power supply: three-phase five wire system, 380V/50Hz.

 

（1）Host part

Project	Quantity	Texture of material
Workbench	1	45 #, welded
Servo motor	1 set	Domestic famous brand (imported optional)
Drive reducer	1	Speed Borrell or other famous brand Youxing reducer
Guide rail assembly	1	HIWIN
Test clamp assembly	1	45 #, welded
Fully enclosed protective cover	1 set	Cold rolled steel plate is processed and formed, and the full plastic spraying treatment is safe and durable

（2）Measurement and control electrical part

Project	Quantity	Brand
Controller	1 set	NAKE
Testing machine measurement and control software	1 set	NAKE
Strong current plate	1 set	NAKE
External hand-held control box	1 set	NAKE
Torsion sensor	1	NAKE
Axial force sensor	1	NAKE
Computer/Printer	Each 1	Lenovo desktop (optional laptop)

（3）Test accessories

Project	Quantity	Remarks
Force application sleeve	1 set	M33-M64
Anti rotation plugboard	1pair	M33-M64
Inner baffle	2 pairs	M33-M64
Outer baffle	1pair	M33-M64
Attached tools	1 set

1. We are a test equipment manufacturer!

2. We have a R & D design team to ensure that you get higher product quality and better prices!

3. We have our own parts processing workshop and product installation workshop, so we guarantee delivery for you as soon as possible!

4. Our company has a professional after-sales team, thoughtful and timely service, to ensure that all users have no worries!

5. Our product software upgrade is free for life, small fault maintenance is free for life!

6. We promise to reply to your inquiry/email as soon as possible.

 

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