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Metal Spinning
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etal spinning is one of the oldest techniques
for the chipless production of circular hollow metal components. History records show that the Egyptians were metal spinning nearly
3,000 years ago, during the reign of the Pharaohs. Up until the First
World War, only nonferrous metals as gold, silver and brass were being spun.
Wartime needs, though, brought about new designs and stronger machines.
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etal spinning involves spinning a flat sheet
of metal -- usually in the shape of a disk -- at a controlled speed. A
"spinning mandrel" is used in stead of a clamping chuck. The mandrel
is made to the from that corresponds with the contour
of the part to be spun. A blank is placed between the mandrel and the tail
stock of the lathe. Spinning rollers or spinning tools are then used against
the blank with a series of axial movement. These movements are done with radial
or swivel strokes either by hand or auxiliary force. As the blank flows against
the mandrel the thickness can change.
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oday with new machines and better tooling,
most metals and alloys can be spun.
