Friction drilling is a method that is used for making holes in metal. This process involves pushing the material out of the way using the heat that comes from friction. The process is also known as flow drilling or thermal drilling and based on some properties and behavior that can also be seen in the friction welding.
Drilling flow differs from other methods in that it helps to increase the cross section of thin-walled tubes much easier. The principle is quite simple. As mentioned earlier, you will need solid metal and friction. The heat from the friction of the hardened bit brings the metal to its melting point and using the pressure from the milling machine, which makes it the perfect hole.
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