Coil spring forming method and forming device
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United States of America Patent
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Jul 17, 2018
Grant Date -
Jul 21, 2016
app pub date -
Sep 2, 2014
filing date -
Sep 26, 2013
priority date (Note) -
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Abstract
A method for forming a wire into a coil spring includes winding the wire around a coiling mandrel to form the wire into a cylindrical coil shape, clamping one end of the wire formed into the cylindrical coil shape, clamping an intermediate portion of the wire spaced from the clamped one end of the wire; and moving the clamped one end of the wire relative to the clamped intermediate position at least in an axis direction of the cylindrical coil shape, whereby a pigtail having a desired shape is formed.
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