| 摘要 |
PROBLEM TO BE SOLVED: To provide a friction pressure welding method which can perform gap control upon friction pressure welding with high precision. SOLUTION: The friction pressure welding method comprises a monitoring process observing the pressure welding state between a workpiece E1 and a workpiece E2. The monitoring process includes: a vibration detecting stage; and a determining stage. In the vibration detecting stage, elastic waves produced inside the workpiece E1 when one end face of the workpiece E1 and one end face of the workpiece E2 are abutted are detected by a vibration detecting sensor 4 fitted to the workpiece E1. In the determining stage, the wave intensities of the elastic waves detected by the vibration detecting sensor 4 are accumulated along a time series, and the accumulated value and previously acquired standard value are compared, thereby whether the gap amount between one end face of the workpiece E1 and one end face of the workpiece E2 is normal or not is determined. COPYRIGHT: (C)2009,JPO&INPIT
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