| 摘要 |
A workpiece (1) is pulled by grippers (4), and stretch formed over a former (2). During this process, a force is applied to the surface of the workpiece (1) by a rolling tool (7), carried at one end of a hydraulic ram (6). At its other end, the hydraulic ram (6) has a roller (8) which follows a contour of a reaction surface (5), to react the force applied to the workpiece (1) at the rolling tool (7). A robotic device (10) operates under the control of a computer (22) to move the hydraulic ram (6) into any desired position, so as to apply a force via the rolling tool (7) to the surface of the workpiece (1), at any desired position and/or orientation. Also disclosed in the specification is a method and apparatus for inhibiting buckling during stretch forming of a workpiece. |
