Method and apparatus for producing a helical spring
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United States of America Patent
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Jan 4, 2005
Grant Date -
Aug 21, 2003
app pub date -
Feb 20, 2003
filing date -
Feb 21, 2002
priority date (Note) -
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Abstract
A method for producing a helical spring by coiling an element wire while feeding the wire, and performing an after-treatment includes at least a warm setting process. The method includes (1) providing a plurality of parameters for defining a desired configuration of a target helical spring, (2) performing a warm setting simulation for defining a change in configuration of a certain helical spring by applying thereto the warm setting process through a simulation, to determine a free height of a helical spring before the warm setting process on the basis of a free height of the target helical spring, (3) determining a configuration of the helical spring before the after-treatment, on the basis of at least the free height of the helical spring before the warm setting process and the plurality of parameters, (4) coiling the element wire on the basis of the configuration of the helical spring before the after-treatment to produce a coiled wire, and (5) applying the after-treatment to the coiled wire, to produce the target helical spring.
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