| 摘要 |
A method of discharge forming bulged articles comprising the steps of inserting a hollow tube-like metallic workpiece in an axially movable mold member, releasing an energy by high voltage discharge so that said movable mold member may be caused to move axially thereof toward a fixed mold member, and compressing said hollow tube-like workpiece axially thereof to cause a portion of the wall of the workpiece to expand outwardly whereby a tube-like article with a bulge can be produced.
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