| 摘要 |
A welding method in the manufacture of an accumulator comprising a cover with a ball welded onto the periphery of an opening formed through the cover, comprises welding the ball onto the cover of the accumulator by placing the ball ( 1 ) in contact with the periphery of an opening ( 2 ) formed through a metal part ( 3, 11 ) preferably of aluminum, and then welding the ball, preferably of aluminum or steel, onto the periphery of the opening using a laser emitting a beam with an annular cross-section ( 4 ).
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