Optimization of high-strength bolt connection pair detection | force collar LJZ‑1000P microcomputer-controlled high-strength bolt detector

The key to the quality of steel structure engineering lies in the performance of high-strength bolt connection pairs. Whether the axial force, torque and torque coefficient of bolts reach the standard directly determines the safety and reliability of steel structure buildings. LJZ‑1000P microcomputer-controlled high-strength bolt detector, independently developed by Jinan Collar Testing Machine, is specially designed for testing hexagonal and torsional shear high-strength bolt connection pairs, and is widely used in steel structure factories, third-party testing institutions, engineering quality inspection laboratories and scientific research units in universities.

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Overview of equipment functions
This equipment introduces international advanced technology, adopts cycloidal pinwheel reducer for automatic loading, and is matched with high-precision linear guide rail; The software supports the full Chinese interface and can expand the English language version. Applicable samples:

M12‑M36, a large hexagon-head high-strength bolt connection pair: testing axial force, torque and torque coefficient.
Torsion-shear type high-strength bolt connection pair M16‑M30: Testing axial force (with torsion-shear wrench)
The whole process of the equipment is controlled by a microcomputer, which automatically completes the tightening, loosening and resetting of bolts, and the intelligent pop-up window prompts during the test process, which is simple and convenient to operate. When the axial force reaches the standard set value, the system automatically collects and saves the test data; The computer automatically calculates the average axial force, average torque, average torque coefficient, standard deviation and variation coefficient, and draws the axial force curve and torque curve in real time. Integrated parameter setting, instrument calibration, data query, report printing, fully meet the laboratory testing process.

Implement national standards
GB/T 10128 "Metal Room Temperature Torsion Test Method"
GB/T 1231‑2024 "High Strength Hexagon Bolt, Hexagon Nut and Washer for Steel Structure"
GB/T 3632‑2008 "Torsional Shear Type High Strength Bolt Connection for Steel Structures"
Core structural characteristics
Horizontal ergonomic host structure, safe and labor-saving test operation; The torsion test module is equipped with linear guide rail, which makes the specimen clamping and adjusting fast and convenient; Foolish measurement and control software, start the whole set of tests with one button, and lower the threshold for personnel operation; The bottom of the main engine is integrated with a toolbox, and all kinds of fixture accessories are neatly stored; The reducer is uniformly and smoothly loaded to ensure the consistency, repeatability and authenticity of the test data.

Above: software main interface | test real-time curve interface | test output report interface The software displays the data of torque, axial force, rotation angle and time in real time; After the test, the standardized test report is generated directly, and the curves and charts are output synchronously, which can be printed and filed directly.

Key technical parameters
project

Technical indicators

Axial force detection range

20‑1000kN

Torque detection range

50‑5000Nm

accuracy class

Grade 1/1% better than the indicated value

Applicable bolt specifications

M12～M36

Applicable length of bolt

60～350mm

repeatability

0.5%

Relative resolution

0.25%

rotation speed

0‑4r/min (usually 0.5‑2r/min)

control system

LLG‑TESTING Special Measurement and Control System

Overall size of main engine

2030×1250×600mm

Overall weight

850kg

Above: Full set of fixture, dynamic torque sensor, and high-strength sleeve fittings. Complete fixture kit: bolt clamping plate, head clamping plate, anti-rotation clamping plate, gravity sleeve, internal and external baffles, covering M12‑M36 full-size bolt detection, and the test can be carried out at hand. The power unit adopts Dongling servo drive system+two-stage cycloidal pinwheel reducer, ocean high-precision torque and axial force sensors, and the quality of core components is stable, which is suitable for long-term continuous test operation.

About us | Jinan Liling Testing Machine Co., Ltd.
Jinan Liling Testing Machine is a professional mechanical test equipment manufacturer integrating R&D, production and sales. The factory covers an area of 30,000m2 and has a complete machining and assembly workshop. With ISO9001, CE and other system certification, a number of utility model patents. Products serve domestic scientific research institutes, building steel structures, rail transit and aerospace industries, and are also exported to overseas markets such as Russia, Brazil and India. Insisting on the ingenious manufacturing of testing machines, we can provide customers with one-stop services of equipment customization, fixture customization, on-site installation and debugging, and technical training.