Analysis on the selection of pneumatic torque wrench

Impact wrench, also known as pneumatic wrench, is mainly a tool that provides high torque output with small compressed air consumption. It uses a continuous power source to accelerate the rotation of an object with a certain mass, and then immediately collides with the output shaft, thus obtaining a relatively large torque output. Pneumatic wrenches are widely used in many industries, such as automobile repair, heavy equipment maintenance, product assembly, major construction projects, and any other place where high torque output is required. The general pneumatic wrench is not applicable to the fastening of soft connection mounting parts with ceramic and plastic fastening parts.
Pneumatic wrenches are generally divided into two types, one is the conventional impact wrench, the other is the pulse pneumatic wrench. The difference between the two is that the former can not set the torque, and the latter can. Pneumatic torque wrench belongs to the latter.
2、 Choose the right tools to do things:
First of all, make sure that the selected pneumatic wrench has the correct torque required to complete the operation. There are different torque requirements for removing screws of various specifications In the following table, you can easily find the appropriate size to disassemble each bolt size category, and try to select the pneumatic wrench tool with green corresponding parameters.
We can generally select the appropriate pneumatic wrench according to different application situations.
1. 1/2 pneumatic wrench refers to the square drive head of the connecting sleeve with a side length of 1/2 inch (12.7mm). This is a relatively small air cannon, suitable for removing the screws on the car tires.
2. 3/4 medium air gun, with large torque strength and moderate weight, is made of high nickel alloy steel, with strong design, and is specialized in the unloading of bolts for automobile maintenance industry, shipbuilding, metallurgy and mining, oil field, railway and heavy machinery.
3. 1-inch pneumatic wrench, equipped with 1-inch square drive head, has greater torque. Generally, it is suitable for the removal of screws on large cars, trucks and buses.
3、 Operation and maintenance tips
1. The correct air supply system is required. In this way, the product can be used longer and better. Make sure that the compressed air entering the wrench pneumatic motor: safe, clean and dry air with atmospheric pressure of 6.0 bar. Otherwise, it may/will inevitably lead to dangerous situations such as transmission system failure, overspeed, rupture, output torque error, etc.
2. Before operating the machine, be sure to check whether there is enough lubricating oil in the oil cup of the triplet. In case of lack or lack of lubrication, the wear speed of the blades of the pneumatic motor will be accelerated, resulting in reduced tool performance and increased maintenance work.
3. In order to ensure the torque output size, the pneumatic wrench has the required size of the diameter of the connecting air pipe. The general size of the 1/2 pneumatic wrench is 3/8in/10mm, to ensure that all hoses and other connecting devices are correctly sized and firmly installed; Do not use damaged, worn or aged air hoses and other connecting devices; It is recommended to install an emergency shutdown valve on the gas supply line and let others know its installation position.
4. Pay attention to the position of the reversing switch before operation, so as to understand the rotation direction during operation. Then adjust the power adjustment knob to the appropriate position. 1 is small. The more the number, the greater the output torque. The output power of forward or reverse rotation can be further adjusted. The power level indication of conventional pneumatic impact wrench is only for reference and does not represent specific power. 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.
5. Pay attention to the balance and stability of body posture during use, and do not operate the tool too far. In the process of opening and operating tools, please prevent and be alert to sudden changes in torque and force during movement. If the hose fails or the connection is broken, an air safety device with appropriate size can be installed on the upper flow of the hose, and a stabilizing device can be used to prevent the hose from swinging through any hose connection without shutting off the inside of the hose.
6. This tool is a torque tool with reaction arm. The huge torque generated by the machine is absorbed by the reaction arm. Therefore, it is necessary to find a support point with sufficient strength for the reaction arm during operation. In view of safety considerations, when the machine is working, it is necessary to stay away from the working range of the reaction arm, otherwise, it will probably/inevitably cause huge personal injury.
7. It is not allowed to dismantle the parts in the tool arbitrarily. It not only affects safety but also may damage tools. If the tool is faulty, cannot reach its original function and cannot be used again, it should be checked and maintained by the manufacturer or professional personnel immediately.
8. Regularly check and maintain tools and add pneumatic lubricating oil!