| 摘要 |
The press brake has a press cradle, which has an upper die across two frames. A ram which has a lower die, moves up and down to perform a bending operation on metal sheets. The upper ends of the beams attached by pins at the lower ends to the ram, are coupled by pins to ends of rotary links which are connected by pins to the press cradle. The rotary links are rotated in a fixed path by hydraulic cylinders rotatably provided on both frames to raise and lower the ram via the beams.
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