| 摘要 |
PROBLEM TO BE SOLVED: To improve finished accuracy of a work by accurately measuring the amount of springback and effectively utilizing it by determining the amount of the springback from difference between the bending angle of the work at the last time of driving and the bending angle in the unloaded state of the work and registering the amount of the springback. SOLUTION: When necessary bending work is completed, the work is demounted from the main body of a working machine. When the bending angle of the work is measured using a digital processor 71, the measured value of the angle is indicated on the indicators 77, 85. When the springback key of an operation unit 81 is pushed, the amount of the springback is calculated and determined from the bending angle in the last pressurized state and bending angle in the unloaded state with a control part 93, it is indicated on the data indicating part 89 and also stored and registered in the storage part of the control part 93. By looking at this indication, the operator knows the accurate amount of the springback without calculating by himself.
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