1. Tubes and tool joints are welded using inertia or friction welding . 2. In Direct Drive Friction welding the drive motor and chuck are connected. 3. Friction welding provides a " full strength " bond with no additional weight.4. Another advantage of friction welding is that it allows dissimilar materials to be joined. 5. Lubrication is therefore required between the center and workpiece to prevent friction welding from occurring. 6. The work of friction is used to mix and join materials such as in the process of friction welding . 7. The "'seizure resistance "'is the ability of a material to resist friction welding . 8. Friction welding is also used with thermoplastics, which act in a fashion analogous to metals under heat and pressure.9. In Inertia Friction Welding the drive motor is disengaged, and the work pieces are forced together by a friction welding force. 10. In Inertia Friction Welding the drive motor is disengaged, and the work pieces are forced together by a friction welding force.
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