| 摘要 |
<p>A bending machine for helically bending an elongated workpiece (T) has at least three bending rollers (2) that, being rotatable integrally with respective supporting shafts (3) with parallel axes (y), co-operate in bending the elongated workpiece (T). Each bending roller (2) is arranged to shift along its own supporting shaft (3) by means of a prismatic coupling for a limited stroke and to swing by means of a rotary coupling for a limited amount of angular displacement along an arc of meridian with respect to the axis of the supporting shaft (3), so that each bending roller (2) is orientated coplanar to the elongated workpiece (T) that takes an inclined position on the basis of a desired helix pitch.</p> |
