| 摘要 |
PURPOSE:To bend whole periphery of opening of a work by one process by making bend dies or punches provided opposedly on the periphery of an opening movable in horizontal direction, pressing them by an elastic member in the direction away from the periphery of the opening, and moving them by lowering of an upper die against the pressing force of the elastic member. CONSTITUTION:Bend dies 8, 13 and bend punches 9, 14 that press form the periphery 7, 15 of opening of a work are provided on a pad 5. The bend die 13 and bend punch 14 positioned opposedly on the periphery 15 of the opening 3 of the work are made movable in horizontal direction, and force is applied in the direction to part them from the periphery 15 by an elastic body 16 such as a spring etc. A cam face 22 is provided further. The cam face is operated by a cam driver 26 provided in the upper die 23 and moves the bend die 13 and bend punch 14 in the direction to press the periphery against the pressing force of the elastic body 16 when the upper die 23 is lowered. |
