Dieless forming apparatus

Details Dieless forming apparatus Dieless forming apparatus

1999-12-03

2000-11-28

Jones, David

Metal deforming

By application of fluent medium, or energy field

With actuated tool engaging work

72413, 724651, 724667, B21D 1120

Patent

active

061519383

ABSTRACT:
The present invention relates to an advanced forming apparatus for sheet blanks such as sheet metals or plastics, and in particular to a multi-purpose and multi-functional forming apparatus which can form sheets into products of various curved surface shape without using a die. The dieless forming apparatus includes an elastomer installed on one side of the sheet blank; a group of punches disposed at the opposite side of the blank, and having ends of various shapes applying a force to the formed material by movement; and a control unit controlling the movement of the press. In addition, a fluid may be filled in substitute for a part of the elastomer to evenly apply a force to the formed material, and a fluid control unit may be included to control a fluid pressure.

REFERENCES:
patent: 2280359 (1942-04-01), Trudel
patent: 2783815 (1957-03-01), Tegarden
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patent: 3748889 (1973-07-01), Miller et al.
patent: 4212188 (1980-07-01), Pinson
patent: 5490407 (1996-02-01), Doose
"Rubber-Pad Forming" (Metals Handbook, 9th edition, vol. 14, ASM, Metals Park, Ohio pp. 605-615).
C.H. Hamilton, "Superplastic Sheet Forming" (Metals Handbook, 9th edition, vol. 14, ASM, Metals Park, Ohio pp. 856-860).
Li Mingzhe, Liu Chunguo and Cai Zhongyi, "A Dieless Forming Technique for Sheet Metal", (Presented at International Conference held in Seoul, Korea on Jul. 8, 1999.

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