LBNJ-36 High-Strength Bolt Slip-Resistant Coefficient Torque Tightening Machine
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Description
Product Introduction:
The LBNJ-36 high-strength bolt slip‑coefficient tightening machine is a specialized testing device developed specifically for evaluating the slip‑coefficient of high‑strength bolts in steel‑structure projects. It fully complies with the testing standards set forth in the Code for Acceptance of Construction Quality of Steel Structures (GB 50205) and is primarily used for the precise pre‑tightening of slip‑test specimens of high‑strength bolted connections, as well as for the simultaneous measurement of axial force and torque. This equipment serves as a core, dedicated instrument for quality inspection of steel structures in construction projects, research institutes, and quality‑inspection agencies.
Working principle:
The working principle of the anti-slip coefficient tightening machine is that a motor-driven torque sensor performs the tightening operation on high-strength bolts. During the tightening process, the torque sensor continuously monitors changes in the bolt’s torque and axial force; this data is transmitted to the control system for processing. Based on pre‑set algorithms and data models, the control system calculates the bolt’s anti-slip coefficient—a critical parameter that helps assess the stability and safety of the bolted connection.
Product Features:
High precision: Utilizing high‑precision sensors and measurement technologies to ensure the accuracy of test results. User‑friendly operation: A intuitive interface and streamlined procedures make the instrument easy to use. High efficiency: Automated testing workflows and advanced data‑processing capabilities significantly enhance testing productivity. Broad applicability: Suitable for a wide range of applications requiring assessment of bolt slip‑resistance, such as structural engineering and bridge construction. Complies with the relevant standards specified in GB 50205‑2020.
Function:
Tightening function: It can tighten high-strength bolts of various specifications to achieve the specified axial force.
Unloading function: After completing the tightening test, the unloading operation can be performed conveniently.
Data Acquisition and Analysis: Real-time data are collected during the bolt tightening process, and the built-in analysis system processes this data to derive key parameters such as the slip resistance coefficient.
Features:
The speed adjustment is easy to tighten and can be flexibly configured to meet testing requirements.
Loading is smooth and precise, ensuring the reliability of test results.
Uninstallation is quick and convenient, improving testing efficiency.
It is suitable for high-strength bolts of various specifications and boasts strong versatility.
Technical Specifications:
| Parameter Category | Parameter content |
| Device Name | Anti-slip coefficient tightening machine |
| Bolt tightening specifications | M16 to M36 |
| Tighten the rotational speed. | 1~4 rpm |
| Deceleration Variable-Force Assembly – Torque-Variable Element | 1/20 rpm |
| Deceleration Variable-Force Assembly – Output Torque | 70 times |
| Deceleration Variable-Force Assembly – Output Torque and Speed | 1~4 rpm |
| Deceleration Variable-Force Assembly – Maximum Torque | 4000 N·m |
| Universal Transmission Unit | X‑ and Y‑axis cross‑adjustment enables precise positioning, ensuring accurate alignment between the test specimen and the power source. |
| Expand Workspace | It can be seamlessly integrated with the anti-slip coefficient tester, achieving user-friendly and intelligent operation. |
| Package dimensions | 1320×790×1480 mm |
| Package weight | 298 kg |
Installation and Commissioning
This machine shall be installed horizontally on a stable foundation. The testing machine shall be positioned at least 1.0 m away from the wall, and sufficient clearance and access space shall be provided around it to accommodate inspection and maintenance activities.
This equipment shall be operated in an environment free from corrosive media and vibration, with power supply voltage fluctuations not exceeding ±10% of the rated voltage. The electrical system of this equipment shall be equipped with a grounding safety protection device.
Usage Instructions and Operational Precautions
1. Before use, ensure that the machine is stable and that all joints on the specimen table move freely.
2. Check whether the motor is operating normally and whether the switch is functioning properly. Installation and commissioning.
This machine shall be installed horizontally on a stable foundation. The testing machine shall be positioned at least 1.0 m away from the wall, and sufficient clearance and access space shall be provided around it to accommodate inspection and maintenance activities.
This equipment shall be operated in an environment free from corrosive media and vibration, with power supply voltage fluctuations not exceeding ±10% of the rated voltage. The electrical system of this equipment shall be equipped with a grounding safety protection device.
Usage Instructions and Operational Precautions
1. Before use, ensure that the machine is stable and that all joints on the specimen table move freely.
2. Check whether the motor is operating normally and whether the switch is functioning properly.
Product Configuration:
| Serial number | Name | Unit | Quantity |
| 1 | Host | Taiwan | 1 |
| 2 | Hexagonal high-pressure air gun sleeve, 24 mm | one | 2 |
| 3 | Hexagonal high-pressure air gun sleeve, 27 mm | one | 2 |
| 4 | Hexagonal high-pressure air gun sleeve, 34 mm | one | 2 |
| 5 | Hexagonal high-pressure air cannon sleeve, 36 mm | one | 2 |
| 6 | Hexagonal high-pressure air cannon sleeve, 41 mm | one | 2 |
| 7 | Hexagonal high-pressure air cannon sleeve, 46 mm | one | 2 |
| 8 | Hexagonal high-pressure air cannon sleeve, 50 mm | one | 2 |
| 9 | Hexagonal high-pressure air cannon sleeve, 55 mm | one | 2 |
| 10 | Hexagonal high-pressure air cannon sleeve, 60 mm | one | 2 |
| 11 | 25-to-38 connecting shaft | one | 1 |
| 12 | 38-to-38 connecting shaft | one | 1 |
| 13 | Certificate of Conformity | portion | 1 |
| 14 | Product Manual | portion | 1 |
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Mobile:+86-15102211717
Whatsapp:+86-15102211717
E-mail:lbt@lbt.ltd
Address:Tianjin Jinghai Economic Development Zone