MECHANICAL PRESS DEVICE

摘要

A single- and double-acting mechanical press device capable of press-forming large-sized blanks under high pressure in a usage manner of single-acting type despite being double-acting type. A mechanical press device provided with a driving section (14) for vertically moving outer slides (8) and an inner slide (9) disposed inside the same with a predetermined timing, wherein a lifting/lowering plate (10) is fixed to the lower end surface of the outer slide (8)in opposed relation to the lower surface of the inner slide (9), the lower surface being provided with an upper die (7) and a lower die (3) positioned below the lower surface thereof for pressing. Further, installed in the upper surface of the lifting/lowering plate (10) is first fluid pressure cylinder (11) adapted to be contracted by a pressing force during lowering caused by the inner slide (9). Further, disposed between the outer slides (8) and the driving section (14) are second fluid pressure cylinders (12) which, when the first fluid pressure cylinders (11) are contracted by a pressing force caused by the inner slide (9), are extended in operative association therewith by the pressure of a pressure fluid supplied from the first fluid pressure cylinders (11), thereby pressing the outer slides (8) downward.