| 摘要 |
Laser beam welding apparatus for effecting a weld along a part-circular path, the apparatus is intended for use in welding end flanges to semicylindrical shells to form semi-cylindrical journal bearings, particularly those having a flange at each end. The apparatus includes a laser source (11) and pair of rotatably mounted housings (17) each supporting a laser nozzle (18), one on each side of a center line (32). Either nozzle (18) can be selected for operation by moving a mirror (13) in and out of the laser beam as is necessary when welding a flange at each end of the shell. Workpieces are held in jigs (39) in jig means (38) and are accommodated by moving the housings (17) towards and away from the center line (32). Welds of different radii may be achieved by moving the nozzle (18) radially with respect to the axis of rotation of the housings (17).
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