Patent ID: 8307683
Filing Date: 2012-11-13
Classification: B21F

Abstract:
1. An apparatus for manufacturing a coil spring comprising: a body; a pair of machining units disposed on the body to oppose each other at one end thereof, wherein each of the machining units comprises; a mandrel disposed in an upper central part of the body, the mandrel rotatably configured to wind a coil spring material around an outer circumference thereof; a mandrel motor disposed at the other end of the machining unit to provide a driving force for rotating the mandrel; and a guide roller part disposed movable along a length direction of the mandrel to guide the coil spring material to be wound around the mandrel, wherein two coil spring materials produced from a furnace are wound around the mandrels, respectively to produce two coil springs through one process, wherein each of the machining units further comprises: a chuck configured vertically movable and disposed at one end of the mandrel to fix one end of the coil spring material to the one end of the mandrel; and a first cylinder disposed at the one end of the mandrel perpendicular to a length direction of the mandrel to provide a driving force for moving the chuck vertically with respect to the length direction of the mandrel.