Application of Pneumatic Tools

Pneumatic tools are much lighter than electric tools because they use air motors and their power weight ratio is much higher than that of electric tools. Moreover, because of the natural heat dissipation of the gas flow, the pneumatic tools will not generate heat even if they are used continuously, and their safety is also high. These advantages make pneumatic tools widely used. As we all know, the drill used for aircraft maintenance greatly exceeds the civil requirements, mainly because of its high concentricity. The drilled holes must be of high quality.
1. Air drill
1.1 Gun type air drill is widely used in Z, and it can be used for horizontal drilling or downward drilling on the floor, skin and other parts, and even a master can use a large drill to deburr.
Comparison between high speed drilling and low speed drilling
The main structure of the air drill is pneumatic motor+reduction gear+output drill chuck. The high-speed drill has low reduction ratio and high speed. It is mainly used for drilling holes with small torque, such as soft composite materials and small holes. The low-speed drill is mainly used for drilling holes with large torque, such as hard titanium alloy, stainless steel and large holes, due to its high reduction ratio and large output torque. Of course, it is better to add auxiliary handles when encountering very hard materials, To avoid danger.
The two kinds of drilling and cutting cannot be mixed. Using a low-speed drill to drill soft materials will lead to low efficiency, but will not cause serious consequences. Using a high-speed drill to drill hard materials will be more troublesome, which may lead to grinding the drill bit, not dying, or even dangerous if you throw your hand away.
1.2 Elbow air drill is mainly used in places that are difficult to reach
1.3 Thread drills are used in narrow and inaccessible places,
1.4 Combined air drill, strictly speaking, is the application of modular idea in air drill. The operator can freely combine the required drill, which can turn 30 degrees, turn 180 degrees, and turn 360 degrees. It is convenient to adapt to the corners of the aircraft.
2 Pneumatic riveter (also called air hammer)
This tool is familiar to everyone. Once you enter the hangar, you can hear the sound of clattering clattering clattering. In fact, the purpose of the riveter is far more than just driving rivets. With a shovel head, you can shovel glue, add a needle head, and remove rust. When the alignment is bad, you can also use it as a hammer. Of course, you can only knock on metal parts, and don't knock on composite materials, otherwise the consequences will be serious.
In fact, the structure of the riveter is very simple, that is, the air source drives the striking block to move back and forth in the chamber. Similar to air drill, riveters can also be divided into short stroke and long stroke. Short stroke riveters have high strike frequency but low force, and are mainly used for small rivets or light knocks. Long stroke riveters have long stroke and low frequency, but they have high force and low sound, and can be used for some large rivets or places requiring strong force.
3. Pneumatic rivet gun
Pop rivet, often encountered in structural repair
4. Pneumatic rivet press
5. Pneumatic grinder is mainly used for local operations, such as anti-corrosion, corner grinding, etc. Some experts use it to grind drill bits
6. Grinding machine, mainly used for material removal in large area
There is a kind of turbocharged grinder, which weighs only 2 kg and reaches 3 horsepower. It has high efficiency and light volume, and can be used in narrow spaces. The only disadvantage is that the price is on the high side, which is about twice that of similar products.
The amount of this tool is large, and the physical paint removal before the aircraft is leased out and the surface treatment after the composite material repair are indispensable. There is a polishing machine that has its own dust collector, which can absorb the dust generated by polishing by using the Venturi principle. However, the disadvantage is that the polishing efficiency drops after the air flow is divided, and it is generally used for minor repairs and minor repairs in the field. It is not easy to use when the workload is heavy.