| 摘要 |
A method for producing workpieces wherein a substantially rotationally symmetrical workpiece (4, 9, 33), which has a workpiece axis (22), is tentered concentrically relative to an inner mandrel (3, 16) provided inside the workpiece (4, 9, 33), and is reshaped by a process of flow forming by radially applying external reshaping rollers (7). The wall thickness of the workpiece (4) is also reduced in at least some regions. The inner diameter (18, 41) of the workpiece (33) is enlarged by applying inner reshaping rollers (11) of an inner reshaping unit. The inner reshaping rollers (11) are arranged such that the roller axes of rotation and the enveloping cone (20) all intersect at one point on the workpiece axis (22). |
| 主权项 |
1. A method of reshaping a workpiece in which an essentially rotation-symmetrical workpiece (4, 9, 33) having a workpiece axis (22) is tensioned concentrically by means of an inner mandrel (3, 16) provided within the workpiece (4, 9, 33) and is reshaped by means of pressure cylinders by radial pressure from outer reshaping rollers (7), whereby the wall thickness of the workpiece (4) is reduced at least in sections,
wherein the inner diameter (18, 41) of the workpiece (33) is expanded by means of contact pressure from inner reshaping rollers (11) of an interior-shaping unit, whereby the inner reshaping rollers (11) are shaped such that each of an enveloping surface of a running surface defines a shell truncated cone (20), and wherein a tip of each shell truncated cone lies on a rotational axis of the inner reshaping rollers (11), whereby the inner reshaping rollers (11) are furthermore mounted such that their roller rotational axes and the shell truncated cones (20) all intersect at a point (21) along the workpiece axis (22), whereby the inner mandrel (3, 16) and the workpiece (4, 9, 33) are all rotationally driven about the workpiece axis (22) or the inner and/or outer reshaping rollers are rotationally driven, whereby an outer diameter of the workpiece (33) is reduced by contact pressure from the outer reshaping rollers (24) of the exterior-shaping unit, whereby the outer reshaping rollers (24) are shaped such that each shell surface of a running surface defines a truncated-cone shell (31) on the rotational axes (34) of the outer reshaping rollers (24), and wherein tips (35) of each truncated-cone shell (31) lie on the rotational axes (34) of the outer reshaping rollers (24), whereby the outer reshaping rollers (24) are further mounted such that their roller rotational axes (34) and the shell cone (31) all intersect at a single point (35) along the workpiece axis (22). |
