plug drawing

plug drawing

[′pləg ‚drȯ·iŋ]
(metallurgy)
Drawing tubing over a plug or mandrel and through a die simultaneously to reduce diameter and thickness and to produce a smooth symmetrical bore surface.
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Typical cold-drawing methods for subject merchandise include, but are not limited to, drawing over mandrel, rod drawing, plug drawing, sink drawing and similar processes that involve reducing the outside diameter of the tubing with a die or similar device, whether or not controlling the inside diameter of the tubing with an internal support device such as a mandrel, rod, plug or similar device.