Patent ID: 9205483
Filing Date: 2015-12-08
Classification: B21C,B21F,Y10T

Abstract:
1. A method for manufacturing a coil spring from a wire, comprising the steps of: holding a spool of the wire with a mounting brace, wherein the spool has a spool axis and the mounting brace is configured to rotate perpendicular to the spool axis, wherein the mounting brace is rotatably coupled to a reference fixture via a mechanical coupling device; dispensing the wire from the spool along a feed direction to a coil-spring winder; forming the wire fed into the coil-spring winder into a coil spring having a plurality of turns; and passively rotating the mounting brace relative to the mechanical coupling device about a holding axis and independent of the spool to reduce a torque acting about a cross section of the wire when dispensing the wire from the spool wherein the holding axis is orthogonal to a rotational axis of the spool.