Coil spring forming apparatus and coil spring formed thereby
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United States of America Patent
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Jan 1, 2013
Grant Date -
Mar 4, 2010
app pub date -
Nov 1, 2007
filing date -
Nov 6, 2006
priority date (Note) -
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Abstract
A coil spring forming apparatus including a core bar 2 which rotates around an axis thereof and on which a wire material W fed from a wire material-feeding means is wound; a clamping portion 22 which rotates integrally with the core bar 2 and grips an end of the wire material W on the core bar 2; and first guide rollers 30 and second guide rollers 40 for guiding the wire material W onto the core bar 2; wherein the first guide rollers 30 and the second guide rollers 40 are provided so as to move independently from each other in parallel with the axis of the core bar 2, and a coil spring formed by the above coil spring forming apparatus.
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