| 摘要 |
PROBLEM TO BE SOLVED: To prevent a sheet material from sagging and breaking into pieces even when a working shape containing points of discontinuity is formed on the sheet material. SOLUTION: When a working roller and a tool horn pass on points, at which a working shape becomes discontinuous, a controller 36 energizingly controls a working roller rotating motor 61 so as to reverse the direction of rotation of the working roller and a tool horn rotating motor 62 so as to reverse the direction of rotation of the tool horn. When the working shape is given from outside, the controller 36 rotatingly drives a working roller revolving motor 25, the working roller rotating motor 61, a working roller feeding motor 28, the tool horn rotating motor 62 and a tool horn feeding motor 61 on the basis of the working shape, the revolving radius of the working roller and the direction of rotation of the working roller. |
