As elaborated by The Library of Manufacturing, metal spinning, also known as conventional spinning, is a process that involves forming an axis-symmetric part over a rotating mandrel. This method employs a tool with a rounded end or roller to apply force to a flat or preformed workpiece held between a mandrel and tail stock. The rotation of the apparatus, coupled with localized pressure from the tool, gradually shapes the sheet metal work over the mandrel, resulting in the desired form.
Metal spinning is commonly conducted cold, but warm or hot spinning can be employed in specific cases. The process is capable of producing large parts with diameters reaching up to 20 feet.
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