Introduction to the principle of pneumatic torque wrench

Pneumatic torque wrench is a torque wrench with high-pressure air pump as the power source. It is a torque multiplier with three or more layers of revolving gears driven by one or two powerful pneumatic motors. Torque is controlled by adjusting the gas pressure. In order to allow specific torque demand setting, each tool is equipped with a special air pressure comparison chart and calibration report for torque. And for further application, the pneumatic torque wrench can be matched with the torque sensor at the same time, so that the output torque is more accurate. After obtaining the required torque, use the appropriate loop system to manually or automatically shut down the air supply.

The pneumatic torque wrench is a hand-held rotating pneumatic tool, which can accurately set the torque to complete the locking or dismantling of nuts and bolts; The control part is realized by the voltage regulator and power management system, and the mechanical part adopts the planetary gear reducer [1]. The operation of the pneumatic torque wrench is quiet - less than 85dB (A), absolutely without impact, reducing the damage to tools, sleeves and locked objects. These two factors can make the operators of tools comfortable, reduce fatigue, and improve safety. The maximum torque can reach 300000 N.m.  

The pneumatic torque wrench provides accurate torque control - the repeatability is ± 5%, equipped with sensor+solenoid valve switch, and the repeatability can reach ± 2%. Pneumatic torque wrench is widely used in many fields, such as aerospace, mining, petrochemical, railway, construction, heavy vehicle assembly and maintenance, heavy equipment loading and unloading, especially in product production and assembly line, especially in occasions where large torque is required, due to its small size, light weight, large output power per unit weight, large torque output, small reaction force, small environmental pollution and low cost. Classification: Pneumatic wrenches are generally divided into two categories, one is conventional impact wrenches, the other is pulse pneumatic wrenches. The difference between the two is that the former can not set the torque, while the latter can. The pneumatic torque wrench belongs to the latter.