apparatus for manufacturing a coil spring, manufacturing methods and set coil spring production of the coil spring

摘要

To provide a manufacturing apparatus of the coil spring which can be easily produced a coil spring for orthodontic treatment having a uniform spring constant within the range of 100 30N / m. A center hole 14a and the support member 12 of the insertion hole 12b is inserted into one end of a wire wound shaft fixing member 21 of the wire wound around axis 20 of the male screw 14 screwed the wire wound around shaft 20 into the internal thread 13a of the support member 13 By fixed to the support member 12, and fixing one end of the wire 16 to the wire fixing portion 12a of the support member 12. Spiral wire 16 to the wire winding shaft 20 by rotating the external thread 14 by the rotation mechanism, while imparting a predetermined tension by the tension applying mechanism to the other end of the wire 16 via the wire guide portion 15b of the wire guide member 15 to produce a coil spring by winding in.BACKGROUND 12