2. Controlled friction
2.1 Principle
Developed first, controlled friction welding involves welding on a direct-drive machine, i.e. one in which the motor supplies the friction torque directly during the heating-up phase.
Such a machine schematically comprises (figure 2 a ) :
a rotating chuck attached to a spindle driven by the motor via a clutch and brake;
a non-rotating chuck or vice, coaxial with the first, associated with an approaching table and capable of exerting friction and forging forces on the assembly.
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Controlled friction
Inertial friction
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