| 摘要 |
A roll forming machine includes a frame supporting a conical drive roll rotatable on a fixed axis, and a conical pinch roll rotatable and movable transversely and angularly toward and away from the drive roll. Transversely movable and angularly adjustable forming rolls are disposed on opposite sides of the pinch and drive rolls, operable to selectively bend a workpiece frictionally held between the pinch and drive rolls and moved by their counter-rotation. The drive and pinch rolls rotate the workpiece about a transverse axis as they move the workpiece through the machine, enabling a consistent and accurate bending of workpieces to desired conical geometries. The machine can employ elongate drive and pinch rolls with guides to selectively place the workpieces along the rolls, to controllably vary the ratio of small-end to large-end radii in shaped pieces. Alternative versions feature a single forming roll, and rolls that alternatively serve the pinching and forming functions. |
