B - Operations – Transporting – 30 – B
Patent
B - Operations, Transporting
30
B
B30B 15/00 (2006.01) B21D 24/02 (2006.01) B21D 24/14 (2006.01)
Patent
CA 2077510
A hydraulic cushioning apparatus for a press, having work-supporting pressure pins, hydraulic cylinders linked with the pressure pins, and a fluid passage connecting a hydraulic power supply to the hydraulic cylinders, to apply a preset hydraulic pressure to the cylinders. The apparatus includes a shut-off valve disposed in the fluid passage for connection and disconnection of the hydraulic power supply to and from the hydraulic cylinders, and a controller for controlling the shut-off valve such that the shut-off valve is closed before a movable die of the press comes into pressing contact with the workpiece, and is held in the closed position for at least a period which expires when the fluid in the hydraulic cylinders rises to the preset pressure level.
Kirii Kazunari
Minami Seiki
Ono Tsutomu
Gowling Lafleur Henderson Llp
Toyota Jidosha Kabushiki Kaisha
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