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Document Type and Number:
Japanese Patent JPH0115330
Kind Code:
B2
Abstract:
A sheet metal workpiece is formed to have a plurality of relatively large diameter but relatively shallow cup-like depressions in a first draw operation, to have the shapes of the cup-like depressions changed in a subsequent draw operation and to form the base of the central cup-like depression into a secondary cup-like depression in a further draw operation.

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Inventors:
ROBAATO JEEMUSU DANKU
Application Number:
JP4574684A
Publication Date:
March 16, 1989
Filing Date:
March 12, 1984
Export Citation:
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Assignee:
PURESHIJON TSUURU ANDO GEEJI PTY LTD
International Classes:
B21D22/26; B21D13/10; B21D53/00; B65D19/00; B65D19/24



 
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