| 摘要 |
<p>A method and apparatus are disclosed for forming a barrel coil spring(10). The apparatus according to the invention has a rotatable head(24), and clamping device (48,50) to attach one end of the coil spring to the rotatable head, a forming die head(34) with at least one forming die(58) which may be inserted between adjacent coils of the spring near said one end such that a forming die bears against an inner surface of a coil, a first rotating device to rotate the head in a first direction about an axis substantially coincident with the longitudinal axis of the coil spring, and a second rotating device to rotate the forming die head in a second direction, opposite to that of the first direction, about an axis substantially coincident with the longitudinal axis of the coil spring. The method according to the invention has the steps of attaching an end of the coil spring to a rotatable head, inserting at least one forming die between adjacent coils so as to bear against an inner surface of a coil, rotating the rotatable head in a first direction about a first axis substantially coincident with the longitudinal axis of the coil spring, and rotating the at least one forming die in a second direction, opposite to that of the first direction, about an axis substantially coincident with the longitudinal axis of the coil spring.</p> |
