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Title:
【発明の名称】プレス成形装置
Document Type and Number:
Japanese Patent JP2543770
Kind Code:
B2
Abstract:
PURPOSE:To obtain press forming of good quality without producing strain at the four corners of a recessed part by drawing by projecting a punch from the surface of a lower die at a speed several times as fast as the descending speed of an upper die with a interlocked lever structure by descending motion of the upper die. CONSTITUTION:A sheet metal W is set on the lower die 12 and is made a blank in the holding state by lowering the upper die 10 and pressing the sheet metal W. Then, when the punch 11 of the upper die is lowered and is reached this side of several millimeters of the bottom dead center, the sheet metal W around a punch 13 is made almostly in the fixing state by being pressed against the lower die 12 with the punch 11 of the upper die and a acting rod 21 is brought into contact with a passive rod 18. At this port of time, the ascending motion of the punch 13 which is made to ascend at the speed several times as fast as the descending speed of the punch 11 of the upper die is started. The sheet metal W of the part where the sheet metal W is clamped with the punch 13 and a receiving member 14 is formed into the recessed part H with a required depth by the so-called drawing forming.

Inventors:
KIDA HIROSHI
Application Number:
JP22758789A
Publication Date:
October 16, 1996
Filing Date:
September 04, 1989
Export Citation:
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Assignee:
KANTO JIDOSHA KOGYO KK
International Classes:
B21D22/24; B21D24/00; (IPC1-7): B21D24/00; B21D22/24
Domestic Patent References:
JP62165013U
JP61107424U
Attorney, Agent or Firm:
Jiro Hirai