FRICTION WELDING

摘要

Portable friction welding apparatus comprises a drive motor (20) for causing relative rotation between a pair of workpieces (70, 71). An auxiliary energy store such as the flywheel (29) is mounted coaxially to a drive shaft (20') of the drive motor. The two workpieces may be urged together in response to movement of the motor (20) relatively to its supporting casing (1, 2). The flywheel (29) is adapted to provide sufficient energy such that the resultant resistive torque between the workpieces (70, 71) on initial contact is reduced to be substantially the same as or less than the driving torque of the drive means.