The technique friction welding is use to bond materials, more particularly thermoplastics and metals with a strong bond. By using friction to heat the surfaces and in that way to join them.
The video that you are about to see will give you a close insight into the process. In it, you will have the chance to see how this automated machine joins the axle ends to rear end housing. As you will be able to see, the ends are clampe into rotating chucks, just as you will find on the industrial lathe.
Then, they are move into a position which is quite near the ends of the housing. Next, they spin up the chunks to a high rotational speed. As soon as they are pressed inward by using the friction in order to heat and clean the metal on the two parts just to create a solid and clean weld.
After the rotation stop, the pressure is applied inward and by so doing. It allows the weld to cure as the metals themselves cool. Often, this procedure is more preferred over typical MIG or TIG welding. Since the heat is confine to a smaller part, it reduces the stress on the metals. This method is considerably faster and quite repeatable.