| 主权项 |
1. A method of applying traction forces to a surface of a work piece through at least two grips comprising,
contacting the work piece with the at least two grips over two or more contact regions along which the surfaces of the work piece and the at least two grips are substantially conformal and where the at least two grips and the work piece exert normal forces on each other, where at least two traction forces are transmitted to the work piece, wherein contact between the at least two grips and the work piece occurs at two or more rollers, balls, or tractor elements which are pressed onto the surface of the work piece and are driven so as to apply the at least two traction forces to the work piece, where the at least two traction forces act in opposing directions and stretch an entire cross-section of the work piece over a stretching region; and simultaneously plastically deforming the stretching region to bend the work piece to have a radius along at least one of a yaw axis, a pitch axis, and a roll axis. |
